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335results about "Chemical data visualisation" patented technology

Method, device and equipment for identifying isomerism graph and property of molecular spatial structure

The invention discloses a method and a device for identifying isomerism graph and property corresponding to a molecular space structure, and machine equipment. The method comprises the following steps: carrying out feature description containing a topological structure on a heterogeneous graph to generate feature information; through sampling the isomerism graph and the feature information, generating a feature vector, corresponding to a key node, on a topological structure contained in the isomerism graph; performing aggregation processing on the feature vectors to generate graph representation vectors corresponding to the isomerism graphs; and according to the graph representation vector, performing classification processing on the isomerism graph to obtain a classification prediction result. Therefore, the identification of the graphical representation corresponding to the heterogeneous graph, such as the molecular spatial structure, can be realized through the neural network, the analysis and processing performance related to the isomerism graph is effectively improved, the neural network is not limited to the classification and identification of network data any more, and the application scene is greatly expanded.
Owner:TENCENT TECH (SHENZHEN) CO LTD +1

Multi-dimensional predicting method for strength of braided ceramic base composite material

The invention provides a multi-dimensional predicting method for strength of a braided ceramic base composite material. Firstly a parameterization method is used for establishing a braided ceramic base composite material single-cell model which comprises yarns and a matrix, and then period grid dividing is performed. Afterwards a mesomechanics method is used for simulating the mechanics behavior of the yarn unit. Furthermore a strain conversion matrix is used for converting a yarn element stiffness matrix from a local coordinate system to an integral coordinate system. Finally through applyingan increment type periodic boundary condition, a micro-stress and a strain field of a single cell are calculated. A volume averaging method is used for obtaining a microscopic stress and strain of the braided ceramic base composite material. If a failure unit band which penetrates through the single cell is formed, failure of the braided ceramic base composite material is determined, and the single-cell average stress is the strength of the braided ceramic base composite material. According to the multi-dimensional predicting method, the multidimensional analysis method in which macrography and mesography are combined is utilized. The strength of the braided ceramic base composite material can be accurately predicted without dependence to a large number of experiments with time consumption and high cost.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Method for evaluating damage and fatigue life of microscopic-macroscopic scale sheet metal forming process model

The invention discloses a method for evaluating damage and fatigue life of a microscopic-macroscopic scale sheet metal forming process model. According to the method of the invention, a microscopic plastic constitutive model is established and macro geometry is coupled; furthermore sheet metal forming process simulation is performed; based on sheet metal forming process simulation, a microscopic-macroscopic coupling fatigue damage model is established for performing fatigue life simulation; a sheet metal forming process and a fatigue failure mechanism are researched, thereby supplying theoretical guidance and technology optimization basis for engineering application. Sheet metal forming process material performance and plastic deformation evolution distribution are researched in a microscopic aspect. Influence and contribution degree of microscopic characteristics such as crystal grain size and orientation distribution and precipitated phase distribution to the sheet metal forming process are researched. Furthermore the macroscopic model and process researching fatigue damage are coupled, and the component fatigue life is evaluated. The invention provides the reliable high-efficiency calculating model and the evaluating method. Establishment of the related model and the algorithm has important science innovation and high engineering application value.
Owner:SICHUAN UNIV

Molecular attribute determination method and device, electronic equipment and storage medium

The invention discloses a molecular attribute determination method and device, electronic equipment and a storage medium, belonging to the technical field of molecules. The method comprise the following steps: S1, representing molecular attribute data of each labeled molecule and molecular structure data of each unlabeled molecule by using molecular topological structure diagrams; S2, inputting the molecular topological structure diagrams of all the labeled and unlabeled molecules into a pre-constructed teacher model, and training all the molecular topological structure diagrams by utilizing semi-supervised learning to obtain parameters of a teacher model; S3, migrating the parameters of the teacher model to a pre-constructed student model; S4, adjusting the student model by using labeledmolecules; S5, using the adjusted student model to assign labels to all the unlabeled molecules to obtain a labeled molecule set; S6, feeding back the labeled molecular set to the teacher model; and S7, repeatedly executing the steps S2 to S6 until the teacher model and the student model are both converged, and predicting molecular attributes by utilizing the converged student model. According tothe invention, the attributes of unknown molecules can be accurately predicted.
Owner:UNIV OF SCI & TECH OF CHINA
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