A method and system are introduced for recognizing cognitive engagement in classrooms by utilizing multimodal data. Associated modalities of cognitive engagement are learned from visual and audio data. This approach involves constructing a multidimensional representation model for cognitive engagement that includes behaviors, emotions, and speech. To identify engagement, three distinct deep learning models are employed: You Only Look Once version 8 (Yolov8) for analyzing body posture, Efficient Network (EfficientNet) for facial expressions, and Text Convolution Neural Network (TextCNN) for speech text. These models are trained and refined with the aid of student engagement surveys, leading to a decision-making process that integrates the results from the different modalities. Additionally, a dataset and a data annotation system are developed for engagement recognition. This innovative method aims to achieve detailed engagement recognition, addressing various perception needs in real-world applications.
A high-speed CMOS pixel detector is provided, which includes a plurality of super pixel modules, where each super pixel module includes an array of N×M super pixel cells and a digital readout logic circuit connected to the N×M super pixel cells, and data is output between the super pixel modules via asynchronous control logic; and peripheral modules, including at least an EoC module, a peripheral readout module, and a peripheral data transmission module connected in sequence, where the EoC module is connected to the super pixel modules. This application adopts a structure in which a plurality of super pixel cells are integrated, allowing for upgrading of a serial sparse readout mode to a parallel sparse readout mode, thereby greatly improving a readout rate, enabling a plurality of pixels to share resources, and reducing pixel dimensions.
Disclosed are an emotional evolution method and terminal for a virtual avatar in educational metaverse. By collecting expression data and audio data of the virtual avatar, and performing emotional feature extraction based on the expression data and the audio data; fusing an extracted sound emotional feature with an extracted expression emotional feature by using an emotional feature fusion model, and performing emotion recognition on a multi-modal emotional feature fusion result obtained by fusion to obtain an emotional category corresponding to the multi-modal emotional feature fusion result; labeling the multi-modal emotional feature fusion result based on a semantic vector of the emotional category to generate an emotional evolution sequence; and driving the virtual avatar to perform emotional expression according to a target emotional evolution pattern extracted from the emotional evolution sequence, a unified and united multi-modal emotional feature fusion result is formed, the emotional self-evolution of the virtual avatar is achieved.
Disclosed are training method and system for autism language barrier based on adaptive learning scaffold, and the method includes the following steps: analyzing and assessing the state of the user before training to obtain an analysis result, and generating an initialized training path based on the analysis result; obtaining training question information, predicting a question-answering correct rate of the user based on user information and training question information, constructing a proximal development zone, and adding training questions that meet the accuracy requirements to the proximal development zone; updating the initialized training path, classifying the training questions in the proximal development zone, adding the classified training questions to the main training task or branch training task, and the user will perform learning and training according to the training task. The disclosure may recommend a suitable training path, and formulate training tasks that are suitable for the user's ability level.
Disclosed are a semantic reasoning method and a terminal for a learning target in an education metaverse. The method includes receiving a description text of a learning target, segmenting the description text into a lexical item sequence, extracting an entry from the lexical item sequence, extracting a semantic lexical item based on the entry, and mapping the semantic lexical item into a first word vector. By capturing the semantic feature vector in the word vector, the subject and knowledge points in the learning target are obtained by reasoning, the target knowledge points of the learning target are determined and positioned, and the association relationship between the target knowledge points is obtained, so that the semantic information of the learning target can be fully mined, and the accuracy of the learning target extraction can be improved. It matches with the corresponding teaching scene based on the learning targets.
The present invention belongs to the technical field of computer vision. Provided are a facial expression recognition method and system based on multi-cue associative learning. The recognition method comprises: inputting a pre-recognized facial image into a student model and/or a teacher model for facial expression recognition. A training method comprises: cropping a global facial sample image to obtain an upper half facial sample image and a lower half facial sample image; extracting cue features; acquiring adjacency matrices corresponding to the upper half facial sample image, the lower half facial sample image and the global facial sample image; fusing associated semantics by using a feature-level attention mechanism, so as to acquire the teacher model; supervising training of the teacher model by using a cross-entropy loss; and supervising training of the student model by using label distillation, KL divergence and a cross-entropy loss. In the present invention, associated cues are used to enhance the learning ability of a model, so as to solve the problem of expression recognition in natural scenarios.
The present disclosure provides a non-contact fatigue detection system and method based on rPPG. The system and method adopt multi-thread synchronous communication for real-time acquisition and processing of rPPG signal, enabling fatigue status detection. In this setup, the first thread handles real-time rPPG data capture, storage and concatenation, while the second thread conducts real-time analysis and fatigue detection of rPPG data. Through a combination of skin detection and LUV color space conversion, rPPG raw signal extraction is achieved, effectively eliminating interference from internal and external environmental facial noise; Subsequently, an adaptive multi-stage filtering process enhances the signal-to-noise ratio, and a multi-dimensional fusion CNN model ensures accurate detection of respiration and heart rate. The final step involves multi-channel data fusion of respiration and heartbeats, succeeding in not only learning person-independent features for fatigue detection but also detecting early fatigue with very high accuracy.
Provided are an HSL protein, a gene encoding an HSL protein, a recombinant vector, a transgenic cell, a composition, use thereof in improving herbicide resistance of crops, and a method for improving herbicide resistance of crops.
C12N 15/29 - Gènes codant pour des protéines végétales, p. ex. thaumatine
C12N 15/82 - Vecteurs ou systèmes d'expression spécialement adaptés aux hôtes eucaryotes pour cellules végétales
C12Q 1/68 - Procédés de mesure ou de test faisant intervenir des enzymes, des acides nucléiques ou des micro-organismesCompositions à cet effetProcédés pour préparer ces compositions faisant intervenir des acides nucléiques
9.
Three-dimensional (3D) integrated teaching field system based on flipped platform and method for operating same
This application relates to teaching applications of virtual reality technology, and provides a three-dimensional (3D) integrated teaching field system based on a flipped platform and a method for operating the same. The system includes a device deployment module, a teaching resource matching module, an acquisition and processing module and an edge computing module. The method includes spatial division of the 3D comprehensive teaching field system in an offline classroom, device deployment, edge computing, holographic display, data acquisition, motion positioning, and construction of a teaching interactive environment.
G09B 5/06 - Matériel à but éducatif à commande électrique avec présentation à la fois visuelle et sonore du sujet à étudier
G06T 17/00 - Modélisation tridimensionnelle [3D] pour infographie
G06T 7/246 - Analyse du mouvement utilisant des procédés basés sur les caractéristiques, p. ex. le suivi des coins ou des segments
G06T 7/70 - Détermination de la position ou de l'orientation des objets ou des caméras
G06V 40/16 - Visages humains, p. ex. parties du visage, croquis ou expressions
G06V 40/20 - Mouvements ou comportement, p. ex. reconnaissance des gestes
G06V 20/70 - Étiquetage du contenu de scène, p. ex. en tirant des représentations syntaxiques ou sémantiques
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G09B 5/14 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves permettant une communication individuelle entre le professeur et l'élève
G09B 5/10 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves tous les postes d'élèves étant capables de présenter la même information simultanément
Disclosed are a non-contact fatigue detection method and system. The method comprises: sending a millimeter-wave (mmWave) radar signal to a person being detected, receiving an echo signal reflected from the person, and determining a time-frequency domain feature, a non-linear feature and a time-series feature of a vital sign signal; acquiring a facial video image of the person, and performing facial detection and alignment on the basis of the facial video image, for extracting a time domain feature and a spatial domain feature of the person's face; fusing the determined vital sign signal with the time domain feature and the spatial domain feature of the person's face, for obtaining a fused feature; and determining whether the person is in a fatigued state by the fused feature. By fusing the two detection techniques, the method effectively suppressing the interference of subjective and objective factors, and improving the accuracy of fatigue detection.
A61B 5/00 - Mesure servant à établir un diagnostic Identification des individus
A61B 5/05 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiquesMesure utilisant des micro-ondes ou des ondes radio
G06V 40/16 - Visages humains, p. ex. parties du visage, croquis ou expressions
A61B 5/0205 - Évaluation simultanée de l'état cardio-vasculaire et de l'état d'autres parties du corps, p. ex. de l'état cardiaque et respiratoire
11.
MILLIMETER-WAVE (mmWave) RADAR-BASED NON-CONTACT IDENTITY RECOGNITION METHOD AND SYSTEM
Disclosed are a millimeter-wave (mmWave) radar-based non-contact identity recognition method and system. The method comprises: emitting an mmWave radar signal to a user to be recognized, and receiving an echo signal reflected from the user; performing clutter suppression and echo selection on the echo signal, and extracting a heartbeat signal; segmenting the heartbeat signal beat by beat, and determining its corresponding beat features; and comparing the beat features of the user with the beat feature sets of a standard user group; if the beat features of the user matches one of the beat feature set in the standard user group, the identity recognition being successful; otherwise, being not successful. According to the method, the use of a heartbeat signal for identity recognition has high reliability, and the use of an mmWave radar technology for non-contact identity recognition has high flexibility and accuracy.
The present invention provides a non-contact fatigue detection system and method based on rPPG. The system and method use multi-thread synchronous communication, and achieve, for real-time detection requirements, the real-time acquisition and processing of an rPPG signal and the synchronous detection of a fatigue state on the basis of a python threading multi-thread module. A first thread is used for capturing, storing and splicing rPPG data in real time; and a second thread is used for achieving real-time analysis of rPPG data and fatigue detection. On the basis of the combination of skin detection and LUV color space conversion, rPPG original signal extraction is achieved, and the interference of environment noise inside and outside a face is eliminated; secondly, the signal-to-noise ratio is increased by means of adaptive multi-stage filtering, and the high-precision detection of respiration and heart rates is achieved by means of a multi-dimensional fusion CNN model; and finally, on the basis of respiration and heart rate multi-channel data fusion, high-precision fatigue classification is achieved.
The present invention discloses construction method and system of a descriptive model of classroom teaching behavior events. The construction method includes steps as the followings: acquiring classroom teaching video data to be trained; dividing the classroom teaching video data to be trained into multiple events according to utterances of a teacher by using a voice activity detection technology; and performing multi-modal recognition on all events by using multiple artificial intelligence technologies to divide the events into sub-events in multiple dimensions, establishing an event descriptive model according to the sub-events, and describing various teaching behavior events of the teacher in a classroom. The present invention divides a classroom video according to voice, which can ensure the completeness of the teacher's non-verbal behavior in each event to the greatest extent. Also, a descriptive model that uniformly describes all events is established by extracting commonality between different events, which can not only complete the description of various teaching behaviors of the teacher, but also reflect the correlation between events, so that the events are no longer isolated.
G06V 20/40 - ScènesÉléments spécifiques à la scène dans le contenu vidéo
G10L 25/78 - Détection de la présence ou de l’absence de signaux de voix
G10L 25/57 - Techniques d'analyse de la parole ou de la voix qui ne se limitent pas à un seul des groupes spécialement adaptées pour un usage particulier pour comparaison ou différentiation pour le traitement des signaux vidéo
G06V 10/774 - Génération d'ensembles de motifs de formationTraitement des caractéristiques d’images ou de vidéos dans les espaces de caractéristiquesDispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant l’intégration et la réduction de données, p. ex. analyse en composantes principales [PCA] ou analyse en composantes indépendantes [ ICA] ou cartes auto-organisatrices [SOM]Séparation aveugle de source méthodes de Bootstrap, p. ex. "bagging” ou “boosting”
G06V 40/20 - Mouvements ou comportement, p. ex. reconnaissance des gestes
Provided are a facial expression recognition method and system combined with an attention mechanism. The method comprises: detecting faces comprised in each video frame in a video sequence, and extracting corresponding facial ROIs, so as to obtain facial pictures in each video frame; aligning the facial pictures in each video frame on the basis of location information of facial feature points of the facial pictures; inputting the aligned facial pictures into a residual neural network, and extracting spatial features of facial expressions corresponding to the facial pictures; inputting the spatial features of the facial expressions into a hybrid attention module to acquire fused features of the facial expressions; inputting the fused features of the facial expressions into a gated recurrent unit, and extracting temporal features of the facial expressions; and inputting the temporal features of the facial expressions into a fully connected layer, and classifying and recognizing the facial expressions.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06V 10/24 - Alignement, centrage, détection de l’orientation ou correction de l’image
G06V 10/62 - Extraction de caractéristiques d’images ou de vidéos relative à une dimension temporelle, p. ex. extraction de caractéristiques axées sur le tempsSuivi de modèle
G06V 10/77 - Traitement des caractéristiques d’images ou de vidéos dans les espaces de caractéristiquesDispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant l’intégration et la réduction de données, p. ex. analyse en composantes principales [PCA] ou analyse en composantes indépendantes [ ICA] ou cartes auto-organisatrices [SOM]Séparation aveugle de source
G06V 10/80 - Fusion, c.-à-d. combinaison des données de diverses sources au niveau du capteur, du prétraitement, de l’extraction des caractéristiques ou de la classification
G06V 10/82 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant les réseaux neuronaux
G06V 20/40 - ScènesÉléments spécifiques à la scène dans le contenu vidéo
G06V 40/16 - Visages humains, p. ex. parties du visage, croquis ou expressions
G06V 10/774 - Génération d'ensembles de motifs de formationTraitement des caractéristiques d’images ou de vidéos dans les espaces de caractéristiquesDispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant l’intégration et la réduction de données, p. ex. analyse en composantes principales [PCA] ou analyse en composantes indépendantes [ ICA] ou cartes auto-organisatrices [SOM]Séparation aveugle de source méthodes de Bootstrap, p. ex. "bagging” ou “boosting”
15.
AUTOMATIC CLASSIFICATION METHOD AND SYSTEM OF TEACHING VIDEOS BASED ON DIFFERENT PRESENTATION FORMS
The present disclosure belongs to the technical field of artificial intelligence, and discloses an automatic classification method and system of teaching videos based on different presentation forms, which with three convolutional neural network models, may accurately locate the information required for teaching video classification by two self-trained YOLOV4 target detection neural network models and human body key point detection technology, solves the problem that the background and character features of teaching videos do not change significantly, and improves the accuracy of feature extraction. The structure of the self-built convolutional neural network models is suitable for classification of Interview type and Head type teaching videos. The depth of the network is just appropriate compared with several classical video classification algorithms, which reduces the energy consumption of computer hardware. Using other related image data sets preprocessed as the required training sets breaks through the bottleneck in data sets of teaching video.
G06V 10/764 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant la classification, p. ex. des objets vidéo
G06V 10/44 - Extraction de caractéristiques locales par analyse des parties du motif, p. ex. par détection d’arêtes, de contours, de boucles, d’angles, de barres ou d’intersectionsAnalyse de connectivité, p. ex. de composantes connectées
G06V 10/82 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant les réseaux neuronaux
G06V 20/40 - ScènesÉléments spécifiques à la scène dans le contenu vidéo
G06V 40/16 - Visages humains, p. ex. parties du visage, croquis ou expressions
16.
Method and terminal for generating simulated voice of virtual teacher
Disclosed are a method and a terminal for generating simulated voices of virtual teachers. Real voice samples of teachers are collected and converted into text sequences, and a text emotion polarity training set and a text tone training set are constructed according to the text sequences; a lexical item emotion model is constructed based on lexical items in the text sequences and is trained by using the emotion polarity training set, and word vectors, an emotion polarity vector, and a weight parameter are obtained by training; and the similarity between the word vector and the emotion polarity vector is calculated, and emotion features are extracted according to a similarity calculation result, a conditional vocoder is constructed according to the voice styles and emotion features to generate new voices with emotion changes. The method and the terminal contribute to satisfying the application requirements of high-quality virtual teachers.
G10L 15/22 - Procédures utilisées pendant le processus de reconnaissance de la parole, p. ex. dialogue homme-machine
G10L 15/26 - Systèmes de synthèse de texte à partir de la parole
G10L 13/10 - Règles de prosodie dérivées du texteIntonation ou accent tonique
G10L 25/63 - Techniques d'analyse de la parole ou de la voix qui ne se limitent pas à un seul des groupes spécialement adaptées pour un usage particulier pour comparaison ou différentiation pour estimer un état émotionnel
G10L 25/18 - Techniques d'analyse de la parole ou de la voix qui ne se limitent pas à un seul des groupes caractérisées par le type de paramètres extraits les paramètres extraits étant l’information spectrale de chaque sous-bande
G10L 13/033 - Édition de voix, p. ex. transformation de la voix du synthétiseur
G06F 40/284 - Analyse lexicale, p. ex. segmentation en unités ou cooccurrence
Provided in the present invention is a high-efficiency and low-toxicity DNA and RNA lipid delivery carrier. In order to enrich the types of nucleic acid drug delivery carriers, improve the in-vivo delivery and expression effects of the nucleic acid drug and reduce the toxicity and side effects, a new ionizable lipid compound having a special structure is provided in the present invention. The compound has a good binding effect with a negatively-charged nucleic acid, which effectively prevents the premature degradation of the nucleic acid by a nuclease in a cell and facilitates the passage of a liposome loaded with the nucleic acid through a cell membrane. Effective degradation and rapid removal can be achieved, the toxicity and side effects of the nucleic acid drug are reduced, and a nucleic acid drug delivery carrier truly having a high transfection efficiency, a high expression level and a low toxicity can be formed.
C07C 229/16 - Composés contenant des groupes amino et carboxyle liés au même squelette carboné ayant des groupes amino et carboxyle liés à des atomes de carbone acycliques du même squelette carboné le squelette carboné étant acyclique et saturé ayant un seul groupe amino et un seul groupe carboxyle liés au squelette carboné l'atome d'azote du groupe amino étant lié de plus à des atomes de carbone acycliques ou à des atomes de carbone de cycles autres que des cycles aromatiques à six chaînons à des atomes de carbone de radicaux hydrocarbonés substitués par des groupes amino ou carboxyle, p. ex. acide éthylènediaminetétra-acétique, acides iminodiacétiques
A61K 47/18 - AminesAmidesUréesComposés d’ammonium quaternaireAcides aminésOligopeptides ayant jusqu’à cinq acides aminés
A61K 9/19 - Préparations médicinales caractérisées par un aspect particulier à l'état particulaire, p. ex. poudres lyophilisées
A61K 31/7105 - Acides ribonucléiques naturels, c.-à-d. contenant uniquement des riboses liés à l'adénine, la guanine, la cytosine ou l'uracile et ayant des liaisons 3'-5' phosphodiester
A61K 31/713 - Acides nucléiques ou oligonucléotides à structure en double-hélice
18.
STROKE ORDER RECOGNITION METHOD AND SYSTEM FOR HANDWRITTEN CHINESE CHARACTER IMAGE
A stroke order recognition method and system for a handwritten Chinese character image. The stroke order recognition method comprises: a preprocessing step, a first stroke order matching step, a second stroke order matching step, and a stroke segment fusion step. The stroke order recognition method is for static handwritten Chinese character images, which avoids the distortion of writing experiences on electronic devices. On the basis of an eight-neighborhood direction encoding rule, illegitimate direction encoding of different types of strokes is provided, and matching weights in the first stroke order matching step are calculated according to the illegitimate direction encoding; first stroke order matching and second stroke order matching is performed on a handwritten Chinese character, which may ensure that each stroke segment in the handwritten Chinese character has a matching stroke order; stroke segment fusion is achieved by means of an eight-neighborhood encoding chain of different stroke segments and legitimate direction encoding of different strokes; and by means of the stroke order recognition method, the accuracy of stroke order recognition in a static handwritten Chinese character image may be effectively improved.
G06V 30/244 - Division des suites de caractères en groupes avant la reconnaissanceSélection des dictionnaires utilisant des propriétés graphiques, p. ex. le type d’alphabet ou la police
A method for operating a comprehensive stereoscopic teaching field system. The method comprises: collecting depth data of a real teaching space, teacher point cloud data, and teaching voice information by means of a sensor (1); on the basis of an edge cloud, realizing basic architecture calculation and caching of virtual teaching space data storage, transmission and rendering (2); establishing a virtual teaching space database model by using a spatial index structure of an R tree, so as to realize distributed data storage (3); generating, by means of positioning and tracking an action of a user, a personalized virtual avatar which is updated in real time (4, 5); and pushing a virtual teaching space image to teacher and student display terminals by using a 5G link and by means of encoding, uploading, 5G rendering, and decoding technology (9). The requirement for multiple teaching scenarios in remote virtual teaching is met, and a new intelligent teaching environment is constructed.
G09B 9/00 - Simulateurs pour l'enseignement ou l'entraînement
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
20.
VIDEO KNOWLEDGE POINT EXTRACTION METHOD AND DEVICE
A video knowledge point extraction method and device, relating to the field of a combination of a natural language processing technology and educational data mining. The method comprises: sequentially inputting subtitles into a BERT model for coding to generate semantic vectors; calculating a cosine similarity between any two semantic vectors, and constructing a semantic similarity table with subtitle indexes; linearly converting the semantic similarity table into a visible binary image; using a boundary detection method to find out a common lower boundary on a diagonal line of the binary image; turning over the binary image in a manner of being perpendicular to the diagonal line of the binary image to find out a common upper boundary; and combining the common upper boundary and the common lower boundary in a pairwise nearest mode, providing subtitle segmentation suggestions, and extracting video knowledge points. The problem of difficulty in segmentation of existing videos with complex picture organization forms is solved.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
A method and system for measuring non-verbal behavior of a teacher. The measurement method comprises: performing three-dimensional modeling on a classroom, analyzing two-dimensional image information of a teaching video, and calculating three-dimensional coordinates and Euler angles of the teacher's head in each frame of the video to obtain line-of-sight point data of the teacher, and projecting a line-of-sight point in a three-dimensional modeled classroom space to visualize the line-of-sight point of the teacher. The attention distribution of the teacher when teaching is understood by means of analyzing the dispersion and coverage of the line-of-sight point of the teacher; the teaching video is grouped every five frames, head movements of the teacher are analyzed by means of using the Euler angles of the teacher's head, and different teaching behaviors corresponding to continuous head movements are identified, thereby clarifying the teaching style and classroom atmosphere of the teacher.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
22.
METHOD AND SYSTEM FOR CONSTRUCTING CLASSROOM TEACHING BEHAVIOR EVENT DESCRIPTION MODEL
The present invention discloses a method and system for constructing a classroom teaching behavior event description model. The construction method comprises the following steps: acquiring classroom teaching video data to be trained; using a voice activity detection technology to divide the classroom teaching video data to be trained into multiple events according to an utterance of a teacher; and using multiple artificial intelligence technologies to perform multi-modal identification on all events, dividing the events into sub-events under multiple dimensions, and establishing, according to the sub-events, the event description model which describes various teaching behavior events of the teacher in the classroom. The present invention can ensure, to the greatest extent possible, the integrity of non-verbal behavior of the teacher in each event by dividing the classroom video according to the voice; and construct the description model that can uniformly describe all events by extracting the commonality between different events. The invention can not only describe the various teaching behavior of the teacher, but also reflect the association between events such that events are not isolated.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
23.
TRIAZOLE SULFONAMIDE DERIVATIVE CONTAINING OXIME ETHER FRAGMENTS, PREPARATION METHOD THEREFOR AND APPLICATION THEREOF, AND BACTERICIDE AND APPLICATION THEREOF
A triazole sulfonamide derivative containing oxime ether fragments, a preparation method therefor and an application thereof, and a bactericide and an application thereof. The derivative has a structure represented by formula (I). The compound has a significantly better control effect against plant diseases, such as downy mildew, downy blight, blight, and late blight, than the prior art at a relatively low concentration.
A non-contact fatigue detection method and system. The method mainly comprises: sending a millimeter-wave radar signal to a person to be subjected to detection, receiving an echo signal reflected from said person, and determining a time-frequency domain feature, a non-linear feature and a timing feature of a vital sign signal (S101); acquiring a facial video image of said person, and performing facial detection and alignment on the basis of the facial video image, so as to extract a time domain feature and a space domain feature of the face of said person (S102); fusing the time-frequency domain feature, the non-linear feature and the timing feature of the vital sign signal with the time domain feature and the space domain feature of the face of said person, so as to obtain a fused feature (S103); and inputting the fused feature into a classifier to perform fatigue state recognition of said person, and determining whether said person is in a fatigued state (S104). By means of the method, two detection techniques are fused, thereby effectively suppressing the interference of subjective and objective factors, and improving the accuracy of fatigue detection.
A triazole sulfonamide derivative containing alkenyl fragments represented by formula (I), a preparation method therefor and an application thereof, and a bactericide comprising the derivative and an application thereof. The derivatives have significantly better effects than the prior art against downy mildew, downy mildew, blight, late blight and other oomycete plant diseases at relatively low concentrations, such as cucumber downy mildew, soybean phytophthora, tomato late blight, potato late blight, eggplant downy mildew, citrus foot rot, pumpkin blight, grape downy mildew, etc.
The present invention relates to the field of application of information technology in teaching. Provided is a method for fusing multiple locomotion mechanisms in a hybrid reinforcement teaching scene, comprising: (1) normalization processing; (2) locomotion perception; and (3) locomotion fusion. In the present invention, according to interaction needs in a reinforcement teaching scene, locomotion information acquisition and locomotion position and range transformation in virtual and real teaching environment spaces are established to achieve locomotion normalization processing; a locomotion response policy and a prompt-based perception enhancement method are designed, and fusion processing for multiple locomotion mechanisms is achieved by means of transition between transfer points and transfer scenes and multiple feedback settings, thereby solving the problem that a user may be disoriented in a locomotion process in a hybrid reinforcement teaching environment, and facilitating satisfying the requirement for the effect of multiple mechanism fusion in the hybrid enhanced teaching scene.
A method for operating a comprehensive three-dimensional teaching field, including: collecting, by a sensor, a depth data of a real teaching space, point cloud data of a teacher and voice data of the teacher; performing calculation and caching of an architecture for data storage, transmission and rendering of a virtual teaching space based on edge cloud; building a database model of the virtual teaching space by using a R-tree spatial index structure to realize distributed data storage; generating a virtual avatar model updating in real time by positioning and tracking an action of a user; displaying an image of the virtual teaching space on terminals of the teacher and a student through encoding, uploading, 5G rendering and decoding by using a 5G link.
G09B 7/02 - Dispositifs ou appareils d'enseignement à commande électrique procédant par questions et réponses du type où l'élève doit donner une réponse à la question posée, ou bien où la machine donne une réponse à la question posée par l'élève
G06T 7/70 - Détermination de la position ou de l'orientation des objets ou des caméras
G10L 15/02 - Extraction de caractéristiques pour la reconnaissance de la paroleSélection d'unités de reconnaissance
G10L 15/22 - Procédures utilisées pendant le processus de reconnaissance de la parole, p. ex. dialogue homme-machine
H04L 41/12 - Découverte ou gestion des topologies de réseau
H04N 13/344 - Affichage pour le visionnement à l’aide de lunettes spéciales ou de visiocasques avec des visiocasques portant des affichages gauche et droit
H04N 13/383 - Suivi des spectateurs pour le suivi du regard, c.-à-d. avec détection de l’axe de vision des yeux du spectateur
G06V 40/16 - Visages humains, p. ex. parties du visage, croquis ou expressions
G06V 40/20 - Mouvements ou comportement, p. ex. reconnaissance des gestes
G06V 40/70 - Biométrique multimodale, p. ex. combinaison d’informations de modalités biométriques distinctes
G06T 17/20 - Description filaire, p. ex. polygonalisation ou tessellation
G06T 17/00 - Modélisation tridimensionnelle [3D] pour infographie
G06V 10/762 - Dispositions pour la reconnaissance ou la compréhension d’images ou de vidéos utilisant la reconnaissance de formes ou l’apprentissage automatique utilisant le regroupement, p. ex. de visages similaires sur les réseaux sociaux
H04N 5/247 - Disposition des caméras de télévision
G06T 13/40 - Animation tridimensionnelle [3D] de personnages, p. ex. d’êtres humains, d’animaux ou d’êtres virtuels
G10L 21/0232 - Traitement dans le domaine fréquentiel
G10L 15/30 - Reconnaissance distribuée, p. ex. dans les systèmes client-serveur, pour les applications en téléphonie mobile ou réseaux
H04L 67/10 - Protocoles dans lesquels une application est distribuée parmi les nœuds du réseau
G01S 17/89 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour la cartographie ou l'imagerie
G01B 21/18 - Dispositions pour la mesure ou leurs détails, où la technique de mesure n'est pas couverte par les autres groupes de la présente sous-classe, est non spécifiée ou est non significative pour mesurer la profondeur
Provided in the present invention are a student collaboration state assessment method and system based on electroencephalogram data. The method comprises: determining electroencephalogram data and a vectorized behavior sequence or the electroencephalogram data during a collaborative learning process of a student, wherein the electroencephalogram data is collected by using an electroencephalogram sensor; and inputting the electroencephalogram data and the vectorized behavior sequence or the electroencephalogram data into a trained classifier to classify the state of the collaborative learning of the student, wherein the state of collaborative learning comprises interactive learning, constructive learning, active learning and passive learning, and the classifier is constructed on the basis of a long short-term memory (LSTM) network, and is used for classifying the state of the collaborative learning of the student according to the electroencephalogram data and the vectorized behavior sequence during the collaborative learning process of the student. In the present invention, a brain-computer interface and machine learning technology are used, and the state of the collaborative learning of a student is automatically monitored. Compared with a traditional method for determining the state of a student by means of observation by a teacher, the present invention is more scientific and efficient.
A 5G strong interactive remote delivery teaching system based on a holographic terminal and a working method thereof, the remote delivery teaching system comprising a data acquisition module, a data transmission module, a 5G cloud rendering module, a natural interaction module, a holographic display module, and a teaching service module; the working method comprises: by means of recording and playback collection devices and sensors, collecting in real time diversified teaching behaviour and holographic images of a lecturer in a lecture hall; implementing data transmission between a classroom terminal, a cloud server, and a rendering cluster via a 5G network link; subjecting data such as audio and video streams and holographic images to processes such as cloud decoding, scene matching, GPU real-time rendering, and cloud encoding, and pushing the rendered holographic images to a holographic display terminal of the classroom terminal, thus helping to meet the needs of remote delivery teaching and providing a new holographic presentation method and form of interaction for the delivery classroom.
G09B 5/10 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves tous les postes d'élèves étant capables de présenter la même information simultanément
G09B 5/14 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves permettant une communication individuelle entre le professeur et l'élève
30.
METHOD FOR GENERATING SENSE OF REALITY OF VIRTUAL OBJECT IN TEACHING SCENE
The present invention belongs to the teaching application field of mixed reality technology, and provides a method for generating a sense of reality of a virtual object in a teaching scene. The method comprises: (1) perception of teaching space: collecting depth data of a teaching space, and sensing changes of a scene object in the field of view in real time; (2) generation of realistic virtual object: realizing an illumination effect of fusion of virtuality and reality by collecting the illumination intensity in the teaching scene, and generating a shadow effect of the virtual object in real time by using ShadowMap; and (3) generation of reality effect by dynamic interaction: by means of settings of interaction prompts for the target of the line of sight and virtual hands, guiding the teacher to complete real-time interaction with the virtual object by using a multi-modal algorithm. The method of the present invention proposes a solution including environment perception, object generation and dynamic interaction, and establishes a set of teaching environment perception solutions including depth data collection, spatial awareness and environment understanding, so as to support the generation and real-time interaction of a realistic virtual object.
The present invention relates to the field of biomedicine, and discloses a pyrazolopyrimidine compound, a pharmaceutical composition, and an application therefor, the oxygen-containing substituted pyrazolopyrimidine compound having the structure shown in formula (I). The oxygen-containing substituted pyrazolopyrimidine compound having the structure shown in formula (I) provided in the present invention or a pharmaceutically acceptable salt, a stereoisomer, a geometric isomer, a tautomer, a nitrogen oxide, a hydrate, a solvate, a metabolite, or a prodrug thereof demonstrate excellent inhibitory activity against TRK kinase, and demonstrate good anti-tumour activity at the animal level.
A millimeter-wave radar-based non-contact identity recognition method and system. The method comprises: transmitting a millimeter-wave radar signal to a user to be recognized, and receiving an echo signal reflected from said user (S101); performing clutter suppression and echo selection on the echo signal, and then extracting a heart rate signal of said user (S102); segmenting the heart rate signal of said user into a beat frequency signal, and determining a corresponding beat frequency feature of said user (S103); and comparing the beat frequency feature of said user with beat frequency features of a standard user group; if the beat frequency feature of said user matches a beat frequency feature of one standard user in the standard user group, the identity recognition for said user being successful; otherwise, the identity recognition for said user being not successful (S104). According to the method, the use of a heart rate signal for identity recognition has high reliability, and the use of a millimeter wave radar technology for non-contact identity recognition has high flexibility and accuracy.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
Provided are a facial expression recognition method and system combined with an attention mechanism. The method comprises: detecting faces comprised in each video frame in a video sequence, and extracting corresponding facial ROIs, so as to obtain facial pictures in each video frame; aligning the facial pictures in each video frame on the basis of location information of facial feature points of the facial pictures; inputting the aligned facial pictures into a residual neural network, and extracting spatial features of facial expressions corresponding to the facial pictures; inputting the spatial features of the facial expressions into a hybrid attention module to acquire fused features of the facial expressions; inputting the fused features of the facial expressions into a gated recurrent unit, and extracting temporal features of the facial expressions; and inputting the temporal features of the facial expressions into a fully connected layer, and classifying and recognizing the facial expressions. According to the present invention, the hybrid attention module is embedded into a convolutional neural network and a recurrent neural network, thereby improving the accuracy rate of facial expression recognition.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
34.
MILLIMETER WAVE RADAR-BASED NON-CONTACT REAL-TIME VITAL SIGN MONITORING SYSTEM AND METHOD
A millimeter wave radar-based non-contact real-time vital sign monitoring system and method. The monitoring system comprises: a millimeter wave transceiving module (1), a real-time signal acquisition module (2), a real-time signal processing module (3), and a visualization module (4). The millimeter wave transceiving module (1) is used for transmitting millimeter waves and receiving echo signals thereof; the real-time signal processing module (3) is used for extracting respiratory signals and heart rate signals by means of clutter suppression; and the visualization module (4) is used for performing waveform fitting on the respiratory signals and heart rate signals, and displaying, by means of a visual interface, the position, respiration, and heart rate of a subject in real time. The clutter suppression effectively overcomes the effect of environmental noise, such that the accuracy of the monitoring system is improved. In addition, the respiratory signals and heart rate signals are fitted by means of an iterative algorithm to visually display relevant waveforms and monitoring results.
A61B 5/0507 - Détection, mesure ou enregistrement pour établir un diagnostic au moyen de courants électriques ou de champs magnétiquesMesure utilisant des micro-ondes ou des ondes radio utilisant des micro-ondes ou des ondes térahertz
A61B 5/0205 - Évaluation simultanée de l'état cardio-vasculaire et de l'état d'autres parties du corps, p. ex. de l'état cardiaque et respiratoire
35.
Method for generating sense of reality of virtual object in teaching scene
A method for generating sense of reality of a virtual object in a teaching scene includes perception of a teaching space, generation of sense of reality of a virtual object and generation of real effect of dynamic interaction. The method is specifically performed through steps of collecting depth data of the teaching space; perceiving changes of a scene object in a field of view in real time; collecting a light intensity in the teaching scene to realize a virtual-real fused lighting effect; generating a shadow effect of the virtual object in real time by using ShadowMap; and guiding a teacher to use a multi-modal algorithm to complete a real-time interaction with the virtual object by setting interactive prompts of a sight target and a virtual hand.
G06T 19/00 - Transformation de modèles ou d'images tridimensionnels [3D] pour infographie
G09B 5/06 - Matériel à but éducatif à commande électrique avec présentation à la fois visuelle et sonore du sujet à étudier
G09B 5/10 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves tous les postes d'élèves étant capables de présenter la même information simultanément
G06F 3/01 - Dispositions d'entrée ou dispositions d'entrée et de sortie combinées pour l'interaction entre l'utilisateur et le calculateur
A learning interest discovery method for an online learning community, which relates to text mining technology in the field of computer technology natural language processing, comprising: acquiring multi-dimensional behavior and text information generated by a learner in an online learning community (A000); combining a domain knowledge named entity word and a learning emotion word to perform text word segmentation (A001); on the basis of a timing-emotion-topic text modeling algorithm, mining the probability distribution of a topic of interest related to emotion and timing information (A002); identifying a learner's learning interests and non-learning interests on the basis of a semantic similarity calculation method (A003); and outputting a learning interest label and the weight thereof according to an application scenario (A004). The method can effectively discover a learner's learning interests, significantly improve the interpretability and accuracy of the learning interests, and help to provide a personalized learning service for the learner.
In the technical field of plant protection, a microemulsion formulation containing clacyfos herbicide, a preparation method therefor, and the use thereof are disclosed. The microemulsion formulation comprises clacyfos, an environment-friendly solvent and a surfactant. The microemulsion formulation has a particle radius of 0.01 μm to 0.1 μm and a pH value of 5 to 7. The microemulsion formulation containing clacyfos herbicide has good dispersibility, small particle size and strong permeability, being a novel green and environment-friendly pesticide formulation.
A01N 25/30 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, caractérisés par leurs formes, ingrédients inactifs ou modes d'applicationSubstances réduisant les effets nocifs des ingrédients actifs vis-à-vis d'organismes autres que les animaux nuisibles caractérisés par les agents tensio-actifs
A01N 57/22 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, contenant des composés organiques du phosphore comportant des liaisons phosphore-carbone contenant des radicaux aromatiques
A method for generating a high-precision and microscopic virtual learning resource includes acquisition of high-definition specimen images, generation of a 3D model of a surface a specimen and interactive display of a microscopic virtual learning resource.
A fusion method for movements of a teacher in a teaching scene includes normalization, motion perception and fusion of movements. According to interaction needs in an enhanced teaching scene, this application establishes a moving information collection and a conversion of moving position and range to realize the normalization of movement.
Disclosed in the present application are a device and method for degrading gaseous pollutants by using an electrochemical method. The device for degrading gaseous pollutants by using an electrochemical method comprises an electrochemical reactor. The electrochemical reactor comprises a power supply, a first electrode, a second electrode, a proton exchange membrane, a first gas flow channel and a second gas flow channel, wherein the proton exchange membrane is arranged between the first electrode and the second electrode, the first electrode is arranged in the first gas flow channel, the second electrode is arranged in the second gas flow channel, and both the first electrode and the second electrode are porous conductive adsorption material electrodes which are loaded with a metal oxide catalyst.
B01D 53/32 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par effets électriques autres que ceux prévus au groupe
A61L 9/16 - Désinfection, stérilisation ou désodorisation de l'air utilisant des phénomènes physiques
41.
ANTI-TUMOR VACCINE MOLECULE, PREPARATION METHOD THEREFOR AND USE THEREOF
A61K 39/385 - Haptènes ou antigènes, liés à des supports
A61K 39/00 - Préparations médicinales contenant des antigènes ou des anticorps
A61K 47/69 - Préparations médicinales caractérisées par les ingrédients non actifs utilisés, p. ex. les supports ou les additifs inertesAgents de ciblage ou de modification chimiquement liés à l’ingrédient actif l’ingrédient non actif étant chimiquement lié à l’ingrédient actif, p. ex. conjugués polymère-médicament le conjugué étant caractérisé par sa forme physique ou sa forme galénique, p. ex. émulsion, particule, complexe d’inclusion, stent ou kit
Disclosed are an electrode used for degrading a gas-phase organic pollutant, a preparation method therefor, and a device for degrading a gas-phase organic pollutant. The preparation method for an electrode used for degrading a gas-phase organic pollutant comprises the following steps: providing a material containing a monatomic metal, and a carbon material electrode; and coating the material containing the monatomic metal on the surface of the carbon material electrode, and drying same to obtain the electrode used for degrading the gas-phase organic pollutant.
A device and method for removing a gaseous pollutant by means of electro-Fenton catalytic oxidation. The device comprises an electrochemical reactor (100); the electrochemical reactor (100) comprises a power source, an anode (10), a cathode (20), a proton exchange membrane (50), an anode airflow channel (30), and a cathode airflow channel (40); the proton exchange membrane (50) is provided between the anode (10) and the cathode (20); the anode (10) is provided in the anode airflow channel (30); the cathode (20) is provided in the cathode airflow channel (40); the cathode (20) is a porous conductive adsorbent material electrode for loading a transition metal catalyst. The method comprises the following steps: introducing air containing the gaseous pollutant into the cathode airflow channel (40), introducing water or air containing water vapor into the anode airflow channel (30), and applying a direct current voltage of 0.5V-36V between the anode (10) and the cathode (20).
Disclosed in the present application are a method and device for removing gaseous pollutants by using an anode-cathode synchronous electrochemical method. The device for removing the gaseous pollutants comprises an electrochemical reactor; the electrochemical reactor comprises a power supply, an anode, a cathode, a proton exchange membrane, an anode airflow channel, and a cathode airflow channel; the proton exchange membrane is provided between the anode and the cathode; the anode is provided in the anode airflow channel; the cathode is provided in the cathode airflow channel; the anode is a first porous conductive adsorption material electrode loaded with a metal oxide catalyst; the cathode is a second porous conductive adsorption material electrode loaded with an iron-containing catalyst.
B01D 53/72 - Composés organiques non prévus dans les groupes , p. ex. hydrocarbures
B01D 53/32 - Séparation de gaz ou de vapeursRécupération de vapeurs de solvants volatils dans les gazÉpuration chimique ou biologique des gaz résiduaires, p. ex. gaz d'échappement des moteurs à combustion, fumées, vapeurs, gaz de combustion ou aérosols par effets électriques autres que ceux prévus au groupe
45.
METHOD AND DEVICE FOR CONSTRUCTING MULTI-SPATIAL FUSED LEARNING ENVIRONMENT
A method and a device for constructing a multi-spatial fused learning environment. The method comprises: pre-defining a plurality of spaces included in a multi-spatial fused learning environment and construction parameters of each space learning environment; constructing each said spatial semantic network model; acquiring a learning subject association event and a learning environment association event, to construct a learning subject-oriented multi-spatial data fusion model having consistent semantic levels; constructing a learning scene-based integrated embodied model; and setting the learning environment construction parameters for the learning subject according to the integrated embodied model. The present invention is able to dynamically construct, in a customized manner, a multi-spatial fused learning environment for a learning subject.
The present invention relates to the field of biomedicine, and discloses a pyrazolopyrimidine compound, a pharmaceutical composition, and an application therefor, the oxygen-containing substituted pyrazolopyrimidine compound having the structure shown in formula (I). The oxygen-containing substituted pyrazolopyrimidine compound having the structure shown in formula (I) provided in the present invention or a pharmaceutically acceptable salt, a stereoisomer, a geometric isomer, a tautomer, a nitrogen oxide, a hydrate, a solvate, a metabolite, or a prodrug thereof demonstrate excellent inhibitory activity against TRK kinase, and demonstrate good anti-tumour activity at the animal level.
Disclosed are a mutant protoporphyrinogen oxidase in tobacco mitochondria and a coding gene and a use thereof. The mutant is a protein derived from SEQ ID NO: 1 by subjecting, a non-polar amino acid of at least one position of position 353, position 356 and position 372 in an amino acid sequence depicted by SEQ ID NO: 1, to substitution, deletion or addition of one or more amino acids without altering enzyme activity. Encoding the mutant gene into a target plant enables the target plant to acquire a resistance to a PPO enzyme inhibitor (herbicide) without overly affecting a catalytic activity of the enzyme. Therefore, the mutant and the coding gene thereof are useful for cultivating a plant with herbicide resistance.
The disclosure discloses a fingerprint positioning method in a smart classroom, which is specifically: firstly, performing Gaussian filtering and taking the average value on a wireless signal strength value RSSI in the fingerprint database; then finding the neighbor point closest to the signal strength of the to-be-measured point; finally, the Euclidean distance is used as the weight reference, and the weighted center of mass is obtained for the nearest neighbor points. The weight index is introduced as an index of the weight, and the coordinates of the to-be-tested node are obtained. The disclosure has a higher positioning accuracy, smaller positioning error fluctuations and greater environmental adaptability.
G01S 11/06 - Systèmes pour déterminer la distance ou la vitesse sans utiliser la réflexion ou la reradiation utilisant les ondes radioélectriques utilisant des mesures d'intensité
G01S 5/02 - Localisation par coordination de plusieurs déterminations de direction ou de ligne de positionLocalisation par coordination de plusieurs déterminations de distance utilisant les ondes radioélectriques
H04W 4/33 - Services spécialement adaptés à des environnements, à des situations ou à des fins spécifiques pour les environnements intérieurs, p. ex. les bâtiments
H04W 4/80 - Services utilisant la communication de courte portée, p. ex. la communication en champ proche, l'identification par radiofréquence ou la communication à faible consommation d’énergie
H04W 4/021 - Services concernant des domaines particuliers, p. ex. services de points d’intérêt, services sur place ou géorepères
H04W 4/02 - Services utilisant des informations de localisation
H04W 8/00 - Gestion de données relatives au réseau
H04W 64/00 - Localisation d'utilisateurs ou de terminaux pour la gestion du réseau, p. ex. gestion de la mobilité
49.
Method and system for analyzing educational big data on basis of maps
The disclosure discloses a method for analyzing educational big data on the basis of maps. The method includes acquiring educational resource data and storing the educational resource data into databases according to certain data structures; constructing theme map layers for each analysis theme, classifying and indexing data according to the analysis themes, and superimposing the theme map layers onto base maps to form data maps; analyzing data of the theme map layers according to the analysis themes and acquiring theme analysis results; extracting the data of the multiple theme map layers in target regions, fusing the data and acquiring region analysis results; acquiring learning preference of users; combining the learning preference of the users according to content of user requests and searching the region analysis results in response to the user requests. The disclosure further discloses a system for analyzing the educational big data on the basis of the maps.
G06F 16/00 - Recherche d’informationsStructures de bases de données à cet effetStructures de systèmes de fichiers à cet effet
G06F 16/9537 - Recherche à dépendance spatiale ou temporelle, p. ex. requêtes spatio-temporelles
G06F 16/9535 - Adaptation de la recherche basée sur les profils des utilisateurs et la personnalisation
G09B 5/12 - Matériel à but éducatif à commande électrique avec présentation individuelle d'une information à une pluralité de postes d'élèves différents postes étant capables de présenter des informations différentes simultanément
50.
Classroom teaching cognitive load measurement system
The invention provides a classroom cognitive load detection system belonging to the field of education informationization, which includes the following. A task completion feature collecting module records an answer response time and a correct answer rate of a student when completing a task. A cognitive load self-assessment collecting module quantifies and analyzes a mental effort and a task subjective difficulty by a rating scale. An expression and attention feature collecting module collects a student classroom performance video to obtain a face region through a face detection and counting a smiley face duration and a watching duration of the student according to a video analysis result. A feature fusion module fuses aforesaid six indexes into a characteristic vector. A cognitive load determining module inputs the characteristic vector to a classifier to identify a classroom cognitive load level of the student.
G09B 19/00 - Enseignement non couvert par d'autres groupes principaux de la présente sous-classe
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
G06K 9/62 - Méthodes ou dispositions pour la reconnaissance utilisant des moyens électroniques
In the technical field of plant protection, a microemulsion formulation containing clacyfos herbicide, a preparation method therefor, and the use thereof are disclosed. The microemulsion formulation comprises clacyfos, an environmentally friendly solvent and a surfactant. The microemulsion formulation has a particle radius of 0.01-0.1 microns and a pH value of 5-7. The microemulsion formulation containing clacyfos herbicide has good dispersibility, small particle size and strong permeability, being a novel green and environmentally friendly pesticide formulation.
A01N 57/22 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, contenant des composés organiques du phosphore comportant des liaisons phosphore-carbone contenant des radicaux aromatiques
The present invention relates to the field of pesticide bactericides, and disclosed are a pyrazinamide compound, a preparation method therefor and an application thereof, and a bactericide. The compound has a structure as shown in formula (I), formula (II) or formula (III). According to the present invention, the pyrazinamide compound having a novel structure is designed by introducing a pyrazine ring fragment in NNF-0721 and a diphenyl ether fragment having wide bioactivity, and the pyrazinamide compound can be used as a novel succinate dehydrogenase inhibitor or bactericide.
PREPARATION METHOD FOR MONODISPERSED AMINATED NANO-DIAMOND COLLOID SOLUTION, SECONDARY DISPERSION PROCESS THEREFOR, AND APPLICATION THEREOF IN CELL LABELING
Provided is a preparation method for a monodispersed aminated nano-diamond colloid solution, comprising: under the condition of room temperature, mixing purified nano-diamond powder, ammonium chloride, and sodium chloride; then placing the mixture in a ball mill for dry ball milling; and washing the ball-milled mixture with deionized water, and performing ultrasonic dispersion and centrifuging to obtain the monodispersed aminated nano-diamond colloid solution. Also provided is a secondary dispersion process for a monodispersed aminated nano-diamond colloid solution, comprising the following steps: drying the aminated nano-diamond colloid solution to obtain aminated nano-diamond powder; and under an ultrasonic or shearing effect, redispersing the aminated nano-diamond powder in a solvent. Also provided is an application of the monodispersed aminated nano-diamond solution prepared according to the preparation method in cell labeling.
The present invention relates to the field of agricultural fungicides. Disclosed are a fused heterocycle structure-containing compound, a preparation method therefor and applications thereof, and a fungicide. The fused heterocycle structure-containing compound has the structure as represented by formula (1), formula (2), or formula (3). The compound of the present invention provides excellent control effects with respect to plant diseases caused by various oomycetous pathogens such as Phytophthora infestans, Phytophthora capsica, Pythium ultimum, Phytophthora nicotianae, Phytophthora litchi, and Pseudoperonospora cubensis, is obviously better than conventional oomycosis control agent dimethomorph, and has great market development prospects.
C07D 471/02 - Composés hétérocycliques contenant des atomes d'azote comme uniques hétéro-atomes du système condensé, au moins un cycle étant un cycle à six chaînons avec un atome d'azote, non prévus dans les groupes dans lesquels le système condensé contient deux hétérocycles
C07D 417/04 - Composés hétérocycliques contenant plusieurs hétérocycles, au moins un cycle comportant des atomes de soufre et d'azote comme uniques hétéro-atomes du cycle, non prévus par le groupe contenant deux hétérocycles liés par une liaison directe de chaînon cyclique à chaînon cyclique
The present invention relates to a method for removing hexavalent chromium from water bodies by sodium oxalate-modified zero-valent iron. The method comprising the steps: soaking zero-valent iron in a sodium oxalate solution for a period of time; and washing and drying to obtain the sodium oxalate-modified zero-valent iron; and then treating water bodies with the sodium oxalate-modified zero-valent iron to remove the heavy metal pollutant hexavalent chromium from the water bodies. Compared with other chemical or physical methods for treating the zero-valent iron, the processing technology of the sodium oxalate-modified zero-valent iron is simple and easy to implement, and also has advantages of high efficiency, no pollution and environmental friendliness.
C02F 1/68 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par addition de substances spécifiées, pour améliorer l'eau potable, p. ex. par addition d'oligo-éléments
C02F 1/70 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par réduction
C02F 101/22 - Chrome ou composés du chrome, p. ex. chromates
C02F 1/52 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par floculation ou précipitation d'impuretés en suspension
C02F 103/06 - Eau souterraine contaminée ou eau de lessivage
C02F 103/10 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de carrières ou d'activités minières
C02F 103/26 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant du traitement de plantes ou de parties de celles-ci
56.
CLASSROOM TEACHING COGNITIVE LOAD MEASURING SYSTEM
The present invention relates to the education informatization field, and provides a classroom cognitive load measuring system, comprising: a task completion degree feature collection module, configured to record a question answering response duration and question answering accuracy of a student when completing a task; a cognitive load self-rating collection module, configured to quantitatively analyze psychological effort degree and task subjective difficulty of the student; an expression and attention feature collection module, configured to collect a classroom performance video of the student and count a smiling duration and a fixation duration of the student according to a video analysis result; a feature fusion module, configured to fuse the six indexes into a feature vector; and a cognitive load determining module, configured to send the feature vector into a classifier to identify a classroom cognitive load level of the student. By means of the present invention, a cognitive load of the student in a classroom can be objectively, quickly, and accurately rated, thereby helping a teacher to improve organization and presentation modes of learning materials, reducing external cognitive loads caused thereby, and improving the teaching effect.
G06K 9/00 - Méthodes ou dispositions pour la lecture ou la reconnaissance de caractères imprimés ou écrits ou pour la reconnaissance de formes, p.ex. d'empreintes digitales
57.
FINGERPRINT-BASED POSITIONING METHOD AND SYSTEM FOR SMART CLASSROOM
,, calculating a weighted centroid of the neighboring nodes having the nearest signal strengths, introducing a weight index as an index of said weight, and obtaining coordinates of the node to undergo detection. The invention has high positioning precision, less fluctuations in positioning errors, and favorable environmental adaptivity.
A map-based method for analyzing educational big data, comprising: acquiring educational resource data and storing same into a database according to a certain data structure; constructing a theme map layer for each analysis theme, classifying and indexing data according to an analysis theme, loading the data to a corresponding theme map layer, and superimposing the theme map layer onto a base map to form a data map; analyzing data of the theme map layer according to the analysis theme and acquiring a theme analysis result; extracting data of multiple theme map layers in a target region, fusing the data and acquiring a region analysis result; acquiring learning preferences of users; and combining the learning preferences of the users according to the content of user requests and searching the region analysis result so as to respond to the user requests. By means of educational data being classified and analyzed according to different theme requirements, the present method may solve part of the problems of current educational data being disorderly and of the relative deficiency of accurate analysis, and educational data may thus be utilized and analyzed.
The present invention relates to an organic synthesis field, and discloses a 1-(8-arylnaphthyl)phosphine ligand and a preparation method therefor, and a phosphine gold complex and the use. The ligand is represented by the following formula (1), wherein each of two R"s is independently selected from phenyl or cyclohexyl, and M is selected from a substituted or unsubstituted heteroaryl, or a substituted or unsubstituted aryl; a heteroatom of the heteroaryl is a nitrogen atom, and the substituent of the heteroaryl is selected from at least one of methyl, methoxy, trifluoromethyl, -Cl and -Br; and the substituted aryl is represented by the following formula (2). In the present invention, the 1-(8-arylnaphthyl)phosphine ligand can be directly prepared, the method is simple, and the defect of a preparation method of the 1-(8-arylnaphthyl)phosphine ligand in the prior art that an applicable range of a substrate is narrow is overcome, a new 1-(8-arylnaphthyl)phosphine ligand is prepared, and the method provided by the present invention has a high yield.
C07C 45/26 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés par hydratation de liaisons triples carbone-carbone
C07C 45/61 - Préparation de composés comportant des groupes C=O liés uniquement à des atomes de carbone ou d'hydrogènePréparation des chélates de ces composés par des réactions ne créant pas de groupe C=O
C07C 49/782 - Cétones comportant un groupe cétone lié à un cycle aromatique à six chaînons polycycliques
60.
PYRAZOLE AMIDE COMPOUND, APPLICATION THEREOF, AND MICROBICIDE
A pyrazole amide microbicide, having a structural formula of N-[2-[2-bromo-4-(trifluoromethyl)phenoxy]phenyl]-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxamide. The microbicide has significant control effect against soybean rust, corn rust, wheat powdery mildew, and cucumber powdery mildew.
C07D 231/14 - Composés hétérocycliques contenant des cycles diazole-1, 2 ou diazole-1, 2 hydrogéné non condensés avec d'autres cycles comportant deux ou trois liaisons doubles entre chaînons cycliques ou entre chaînons cycliques et chaînons non cycliques avec des hétéro-atomes ou avec des atomes de carbone comportant trois liaisons à des hétéro-atomes, avec au plus une liaison à un halogène, p. ex. radicaux ester ou nitrile, liés directement aux atomes de carbone du cycle
The present invention relates to the field of pesticides. Disclosed are a pyrazole amide compound and an application thereof, and a fungicide. The pyrazole amide compound has a structure as represented by the following formula (I). The pyrazole amide compound provided by the present invention has significant control effects on soybean rust, corn rust, wheat powdery mildew, cucumber powdery mildew, and rice sheath blight even at low concentrations. (I)
C07D 231/14 - Composés hétérocycliques contenant des cycles diazole-1, 2 ou diazole-1, 2 hydrogéné non condensés avec d'autres cycles comportant deux ou trois liaisons doubles entre chaînons cycliques ou entre chaînons cycliques et chaînons non cycliques avec des hétéro-atomes ou avec des atomes de carbone comportant trois liaisons à des hétéro-atomes, avec au plus une liaison à un halogène, p. ex. radicaux ester ou nitrile, liés directement aux atomes de carbone du cycle
A mass calibration kit and a calibration method for a low-mass area of a high-resolution mass spectrometer in negative ion mode. The mass calibration kit comprises semiconductor nanometer material suspension, a free fatty acid standard solution and a MALDI sample target cleaning liquid. The mass calibration method comprises: adjusting a voltage difference between a sample target of the mass spectrometer and a slit to be 20 V; dripping the semiconductor nanometer material suspension on the surface of the sample target till a solvent is completely volatilized and dried; dripping the free fatty acid standard solution on the surface of a semiconductor nanometer material till the solvent is completely volatilized and dried; and putting the sample target in the mass spectrometer for mass calibration, wherein calibration coefficients obtained after the instrument calibration can be used for correcting a sample mass spectrometric detection result. The calibration kit can effectively correct a low-mass area of a MALDI mass spectrometer in negative ion mode; mass spectrum signals are free of background interference; accurate measurement of the mass of a small molecule compound can be realized; and a relative error is less than 6 ppm.
A determination method for interface photoelectron migration and material photocatalytic activity and a four-dimensional micro-imaging analyzer are provided. The four-dimensional micro-imaging analyzer comprises a sample target (1), a laser device (2), a slit (3), an extraction electrode (4), a hexapole (5), a quadrupole (6), a time-of-flight mass analyzer (7), a detector (8), and a device (9) for supplying voltage to the sample target (1), the slit (3), the extraction electrode (4), and the hexapole (5). The method exploits the tunneling effect generated on photogenerated electrons by a semiconductor material under laser irradiation, as well as the capture principle for electron acceptor modules, to determine the mass-to-charge ratio and ion signal intensity of interface migration photogenerated electrons captured by the electron acceptor modules, or of the product of a photochemical reaction induced by the electron acceptor modules capturing interface migration photogenerated electrons, thus obtaining photocatalytically active sites, and, via image reconstruction, obtaining microscopic imaging of the photocatalytically active sites. In the present invention photocatalytically active sites of semiconductor materials can be determined, while at the same time, the degree of difficulty of a photochemical reaction occurring on electron acceptor modules and the product of such a photochemical reaction can be determined.
G01N 21/63 - Systèmes dans lesquels le matériau analysé est excité de façon à ce qu'il émette de la lumière ou qu'il produise un changement de la longueur d'onde de la lumière incidente excité optiquement
64.
BACTERICIDAL COMPOUND, BACTERICIDAL COMPOSITION AND PREPARATION, AND APPLICATIONS THEREOF
The present invention relates to the field of agricultural bactericides. Disclosed are a novel bactericidal compound having significant effects in plant disease control, a bactericidal composition and preparation comprising the bactericidal compound, and applications thereof. The structure of the bactericidal compound is as represented by formula (1). The compound provided in the present invention has significant effects in plant disease control, specifically, the compound provided in the present invention has significant control effects for cucumber downy mildew.
A mass correction kit and a correction method for a low-mass area of a high-resolution mass spectrometer in negative ion mode. The mass correction kit comprises semiconductor nanometer material suspension, a free fatty acid standard solution and an MALDI sample target cleaning liquid. The mass correction method comprises: adjusting a voltage difference between a sample target of the mass spectrometer and a slit to be 20 V; dropping the semiconductor nanometer material suspension on the surface of the sample target till a solvent is completely volatilized and dried; dropping the free fatty acid standard solution on the surface of a semiconductor nanometer material till the solvent is completely volatilized and dried; and putting the sample target in the mass spectrometer for mass correction, wherein correction coefficients obtained after the instrument correction can be used for correcting a sample mass spectrometric detection result. The correction kit can effectively correct a low-mass area of an MALDI mass spectrometer in negative ion mode; mass spectrum signals are free of background interference; accurate measurement of the mass of a small molecule compound can be realized; and a relative error is less than 6 ppm.
An image acquisition semiconductor film for a high-resolution mass-spectral imaging system, and a preparation method and an application. The image acquisition semiconductor film for the high-resolution mass-spectral imaging system is prepared by using the following method: weighing semiconductor nanometer particles, putting the semiconductor nanometer particles into a muffle furnace for burning first, further grinding by using an agate mortar, and uniformly dispersing the semiconductor nanometer particles so as to obtain semiconductor nanometer powder; and finally, pressing the semiconductor nanometer powder in a tablet press so as to obtain the semiconductor film. By using the laser-induced tunnel electron capture principle of a semiconductor nanometer material, a sample is molecularized and ionized without background interference; the limitation of a conventional MALDI substrate is overcome; the semiconductor film is simple and easy to obtain, is stable in mass-spectral signal, has a uniform and smooth surface, generates no background interference, and can be used for fingerprint analyzing and animal and plant tissue slice analyzing; and the semiconductor film is particularly applied to accurate mass-spectral imaging of small molecular substances, so that mass control and industrialization can be performed conveniently.
Disclosed are a pyrazole amide compound containing diphenyl ether as represented by formula I and/or formula II, application thereof in the prevention and treatment of rice sheath blight and cucumber powdery mildew, and pesticide composition containing the compound. The pyrazole amide compound of the present invention containing diphenyl ether as represented by formula I and/or formula II, and a bactericide containing the pyrazole amide compound as an active ingredient have good prevention and treatment effects on rice sheath blight and cucumber powdery mildew.
C07D 231/12 - Composés hétérocycliques contenant des cycles diazole-1, 2 ou diazole-1, 2 hydrogéné non condensés avec d'autres cycles comportant deux ou trois liaisons doubles entre chaînons cycliques ou entre chaînons cycliques et chaînons non cycliques avec uniquement des atomes d'hydrogène, des radicaux hydrocarbonés ou des radicaux hydrocarbonés substitués, liés directement aux atomes de carbone du cycle
Disclosed in the invention are a O,O-dialkyl-alpha (substituted phenoxybutanoyloxy) hydrocarbyl phosphonic acid ester having herbicidal activity and preparation method thereof, and the use thereof as an active ingredient of herbicides. The compound of the invention has a structure as shown by general formula (I), wherein R represents H or C1-C5 alkyl; R1 represents H, C1-C5 alkyl, C1-C5 substituted alkyl, phenyl, furanyl, pyridyl or substituted phenyl; and X and Y represent H, halogen, C1-C4 alkyl, substituted alkyl, alkoxy or nitro, with X and Y being the same or different. The compound of the invention has significant inhibitory effects on the growth of monocotyledons or dicotyledons, and can be used as an effective ingredient of herbicides.
C07F 9/655 - Composés hétérocycliques, p. ex. contenant du phosphore comme hétéro-atome du cycle comportant des atomes d'oxygène, avec ou sans atomes de soufre, de sélénium ou de tellure, comme uniques hétéro-atomes du cycle
A coumarin derivative. The coumarin derivative (1) is shown in formula (1), wherein R1 is one of pentafluoroethyl and heptafluoropropyl, and R2 is one of trifluoromethyl, methyl, cyan, pyridine ring group shown in formula (5), and benzothiazole ring group shown in formula (6). Further provided are an application of the coumarin derivative in detection of elastase activity, an elastase detection method, and a detection kit used for detection of elastase activity.
C07D 311/18 - Benzo [b] pyrannes non hydrogénés dans le carbocycle avec des atomes d'oxygène ou de soufre liés directement en position 2 non hydrogénés dans l'hétérocycle substitués autrement qu'en position 3 ou 7
C09K 11/06 - Substances luminescentes, p. ex. électroluminescentes, chimiluminescentes contenant des substances organiques luminescentes
C07D 403/06 - Composés hétérocycliques contenant plusieurs hétérocycles, comportant des atomes d'azote comme uniques hétéro-atomes du cycle, non prévus par le groupe contenant deux hétérocycles liés par une chaîne carbonée ne contenant que des atomes de carbone aliphatiques
Substituted phenoxyethyl (isopropyl) acyloxyalkyl phosphonate comprising phosphorusheterocyclic ring and having herbicidal activity, and preparation therefor
2 represents H, methyl, and methyl only if R in the general formula I is 1-sulfo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl as phosphorusheterocyclic ring; X and Y represent H, halogen, C1-C4 alkyl or trifluoromethyl, and X and Y are the same or different. The compounds according to the present invention may be used as active component of dicotyledonous broadleaf weed herbicides.
A01N 57/36 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, contenant des composés organiques du phosphore comportant du phosphore comme chaînon d'un cycle
C07F 9/6571 - Composés hétérocycliques, p. ex. contenant du phosphore comme hétéro-atome du cycle comportant des atomes de phosphore, avec ou sans atomes d'azote, d'oxygène, de soufre, de sélénium ou de tellure, comme hétéro-atomes du cycle comportant des atomes de phosphore et d'oxygène comme uniques hétéro-atomes du cycle
Disclosed is a derivative of 2-methyl-4-amino-5-（substituted-1H-1,2,3-triazol）methyl pyrimidine of general formula I and microbicidal activity thereof. In the formula, R1 represents hydrogen, I; X represents O or NH; Y represents phenyl of substituted phenyl, benzoyl or substituted benzoyl, phenyloxyacetyl or substituted phenyloxyacetyl; the substituents on the phenyl rings which Y involves are: H, halogen, nitro, cyano, CF3, C1~4 alkyl, methoxyl, C1~2 carboxyl or carboxylic ester groups; any position of phenyl rings can be mono- or multi-substituted by identical or different substituents. The compound has a significant inhibition effect on cucumber bacterial angular leaf spot, tomato bacterial leaf spot, cucumber brown blot, cucumber downy mildew, rice sheath blight, Gibberella saubinetii, Altemaria solani, Botrytis cinerea, Alternaria alternata and Colletotrichum orbiculare and it can be used as an effective ingredient of microbicides.
C07D 403/06 - Composés hétérocycliques contenant plusieurs hétérocycles, comportant des atomes d'azote comme uniques hétéro-atomes du cycle, non prévus par le groupe contenant deux hétérocycles liés par une chaîne carbonée ne contenant que des atomes de carbone aliphatiques
SUBSTITUTED PHENOXYETHYL(ISOPROPYL)ACYLOXYALKYL PHOSPHONATE COMPRISING PHOSPHORUSHETEROCYCLIC RING AND HAVING HERBICIDAL ACTIVITY, AND PREPARATION THEREFOR
A substituted phenoxyethyl(isopropyl)acyloxyalkyl phosphonate comprising phosphorusheterocyclic ring and having herbicidal activity, with a general formula of I, wherein R represents 5,5-dimethyl-1,3,2-dioxaphosphorinan-2-one-2-yl, or 1-oxo- 1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl, or 1-sulfo-1-phospha-2,6,7-trioxabicyclo 2,6,7-trioxabicyclo[2,2,2]octan-4-yl; R1 represents H, C1-C4 alkyl, phenyl, furyl, pyridyl, or phenyl substituted with methyl, methoxyl, nitro or chloro; R2 represents H, methyl, and methyl only if R in the general formula I is 1-sulfo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl as phosphorusheterocyclic ring; X and Y represent H, halogen, C1-C4 alkyl or trifluoromethyl, and X and Y are the same or different. The compounds according to the present invention may be used as active component of dicotyledonous broadleaf weed herbicides.
A01N 57/36 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, contenant des composés organiques du phosphore comportant du phosphore comme chaînon d'un cycle
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