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60 results about "Functional similarity" patented technology

Functional Similarity Matrix (FunSimMat) Abstract The Functional Similarity Matrix (FunSimMat) is a comprehensive database providing various precomputed functional similarity values for proteins in UniProtKB and for protein families in Pfam and SMART.

Method for identifying key proteins in protein-protein interaction network

The invention discloses a method for identifying key proteins in a protein-protein interaction network. According to the method, an undirected graph G is constructed according to the protein-protein interaction data, and the edge clustering coefficient of the graph is calculated. Compared with the prior art, the method provided by the invention has the advantages of combining the gene expression profile data and the gene function annotation information data on the basis of considering the topological structure characteristics of the protein-protein interaction network, and integrating three groups of data to predict the key proteins, so that the influence caused by the data noise of a single data source on the prediction correctness can be effectively decreased, and the key proteins in the network can be predicted through the key protein characteristics embodied by three types of data, such as the edge clustering coefficient in the protein-protein interaction network, the Pearson's correlation coefficient of the gene expression value and the gene function similarity index. According to the method, the identification correctness of the key proteins in the protein-protein interaction network can be remarkably improved, and abundant key proteins can be predicted once, so that the problem that the biological experiment method is high in cost and time-consuming is solved.
Owner:EAST CHINA JIAOTONG UNIVERSITY

Diffusion tensor imaging white matter fiber clustering method

The invention provides a diffusion tensor imaging white matter fiber clustering method. The method includes the steps of pre-processing original rsf magnetic resonance imaging (MRI) data and the original diffusion tensor imaging (DTI) data, registering the pre-processed rsf MRI data into a DTI space, respectively conducting fiber tracking and brain tissue segmentation on the pre-processed DTI data, conducting fiber projection on white matter fiber which can not reach grey matter or exceed a grey matter surface in a white matter fiber obtained by DTI, then calculating functional similarities among the white matter fiber, obtaining a matrix of the similarities and clustering by adopting an affine spread clustering algorithm. Fiber bundle has functional independence, accuracy without need to relay on of a genetic linkage map and require complicated registration.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method and system for predicting drug-target protein interaction relationship based on decision template

ActiveCN106709272ASolve the problem of sparseness (that is, the number of positive samples is small)Improve forecast accuracyBiostatisticsSpecial data processing applicationsProtein targetDecision taking
The invention discloses a method and a system for predicting a drug-target protein interaction relationship based on a decision template. Multiple similarity characteristic combinations are formed in combination with existing drug compound molecular structure similarity, drug ATC annotation similarity, target protein sequence similarity and function similarity through proposing two new target protein similarity measurement policies, namely, GO ontology annotation-based and pathway function mapping-based similarity measurement; and the drug-target protein interaction relationship is predicted by adopting a KNN classification algorithm based on a hypothesis that similar drugs easily interact with similar target proteins. According to the method and the system, a decision template fusion-based policy is proposed; multiple similarity measurement-based classifier prediction results are subjected to decision level fusion; the problem that a known drug-target protein interaction relationship is relatively sparse is effectively solved in combination with concepts of super target proteomes and super drug groups; the prediction precision is improved; and the method and the system can be used for realizing target protein prediction of new drugs or drug prediction of new target proteins.
Owner:XI'AN PETROLEUM UNIVERSITY

Drug repurposing based on deep embeddings of gene expression profiles

PendingUS20190114390A1Confirming pharmacologic similarityAccurately and effectively pharmacological similarityChemical property predictionMicrobiological testing/measurementPattern recognitionProtein target
A deep learning model measures functional similarities between compounds based on gene expression data for each compound. The model receives an unlabeled expression profile for a query perturbagen including transcription counts of a plurality of genes in a cell affected the query perturbagen. The model extracts an embedding of the expression profile. Using the embedding of the query perturbagen and embeddings of known perturbagens, the model determines a set of similarity scores, each indicating a likelihood that a known perturbagen has a similar effect on gene expression as the query perturbagen. The likelihood, additionally, provides a prediction that the known perturbagen and query perturbagen share pharmacological similarities. The similarity scores are ranked and, from the ranked set, at least one candidate perturbagen is determined to be pharmacologically similar to the query perturbagen. The model may further be applied to determine similarities in structure and biological protein targets between perturbagens.
Owner:BIOAGE LABS INC

Function module detecting method based on node domination capacity similarity

The invention discloses a function module detecting method based on node domination capacity similarity. The function module detecting method mainly solves the problem that in the prior art, sparse function modules cannot be mined in directed network data effectively. According to the technical scheme, the function module detecting method comprises the steps that directed control relationships between nodes are analyzed on the basis of network maximum matching; a node control region and an observation region are used for depicting the capacity magnitude of a density-unrelated node directional domination network; node function similarity is measured from the aspect of the control process of a domination system, a maximum matching enumeration method based on the Markov random sampling process is provided, and domination capacity similarity is calculated; the domination capacity similarity is applied to clustering analysis of a directed network to find out control-relationship-related sparse function modules through detection. The function module detecting method based on the node domination capacity similarity has the advantage that detection results are not affected by weight noise of data and can provide tool support for discovery of knowledge in directed sparse network data.
Owner:XIDIAN UNIV

lncRNA-miRNA-disease association method based on fusion similarity

The invention discloses an lncRNA-miRNA-disease association method based on fusion similarity. The method comprises the following steps: constructing an lncRNA-miRNA-disease network; calculating the functional similarity of the fused lncRNA; calculating and integrating disease semantic similarity; obtaining a weight matrix of the miRNAs between the miRNA-lncRNAs and a weight matrix of the miRNAs between the miRNA-diseases according to a weight distribution algorithm; obtaining a miRNA-lncRNA association score matrix according to the fused lncRNA with similar functions, the miRNA-lncRNA adjacency matrix and the weight matrix of miRNA-lncRNA between the miRNA-lncRNAs; integrating the disease semantic similarity, the miRNA-disease adjacency matrix and the weight matrix of miRNAs among miRNA-diseases to obtain a miRNA-disease association score matrix; integrating the two incidence matrixes to obtain an incidence score matrix Smld; and predicting the Smld by using the prediction model. Theunknown incidence relation hidden under the data is revealed through the multi-aspect data relation.
Owner:QIQIHAR UNIVERSITY

User portrait inference method and device based on spatio-temporal movement data representation learning

An embodiment of the invention provides a user portrait inference method and device based on spatio-temporal movement data representation learning. The method comprises the following steps: acquiringa plurality of users and place data accessed by the users, representing the similarity of a user space-time mode by side length weights of the users, representing the functional similarity of the places by side length weights of the places, and representing the frequency of the places accessed by the users by side length weights of the users and the places to obtain a mobile network with reservedsemantics; obtaining a user representation vector when the preset target function is minimum, inputting the user representation vector into a preset machine learning classification model, and obtaining an inference result of the user portrait; wherein the target function is constructed according to the three types of side length weights, the user representation vector and the place representationvector. According to the method, a large amount of feature generation and feature screening do not need to be carried out manually, the model training efficiency is high, the labor cost is effectivelysaved, the model performance can be effectively guaranteed, and then accurate user attribute inference based on mobile data is achieved.
Owner:北京清鹏智能科技有限公司

Target PPIs drug property prediction method and device based on protein interaction network

The invention provides a target PPIs drug property prediction method based on a protein interaction network. The method at least comprises the following steps: S1, detecting the interaction relationship of interaction protein structural domains in the PPI network; S2, detecting a drug small molecule binding pocket on the surface of interaction protein in the PPI network; S3, obtaining a GO function similarity score of the interactive protein in the PPI network; S4, screening out PPIs meeting the following conditions at the same time to serve as drug therapy targets: protein interaction relationship pairs have structural domain interaction; in the protein interaction relationship pair, at least one protein surface has a small molecule drug binding pocket; at least two of the GO function categories of the interaction proteins of the protein interaction relationship pair have significant similarity, and the GO function categories comprise GO BP, GO MF and GO CC. According to the method, three strict mutually independent standards are adopted to comprehensively explore and discover the target PPI, false positive interaction is systematically eliminated, more reliable PPIs are selectedas drug targets, and the calculation result better conforms to objective reality.
Owner:上海源兹生物科技有限公司

A method for predicting disease-related metabolites by adopting double random walk

The invention discloses a method for predicting disease-related metabolites by adopting double random walk. The method comprises the following steps: firstly, calculating semantic similarity of a disease by utilizing the semantic information of the disease, and calculating functional similarity of the metabolites according to the relationship between the disease and the metabolites; secondly, according to the known metabolite-disease relationship, calculating Gaussian kernel action spectrum similarity of the disease and the metabolites respectively; thirdly, constructing a final disease similarity network based on the semantic similarity of the disease and the Gaussian kernel action spectrum similarity of the disease, and constructing a final metabolite similarity network based on the function similarity of the metabolites and the Gaussian kernel action spectrum similarity of the metabolites; and finally, constructing a two-part heterogeneous network based on the disease similarity, the metabolite similarity and the known metabolite-disease relationship network, and predicting the disease-related metabolites in the heterogeneous network by utilizing a double random walk method. Tests prove that the method disclosed by the invention can predict the disease-related metabolites, provides a basis for biological experiments and improves diagnosis and treatment level of the disease.
Owner:SHAANXI NORMAL UNIV

Similarity of binaries

A computer implemented method of estimating a similarity of binary records comprising executable code, comprising converting a first binary record and a second binary record to a first intermediate representation (IR) and a second IR respectively, decomposing each of the first IR and the second IR to a plurality of strands which are partial dependent chains of program instructions, calculating a probability score for each of the plurality of strands of the first IR to have an equivalent counterpart in the second IR by comparing each strand of the first IR to one or more strands of the second IR, adjusting the probability score for each strand according to a significance value calculated for each strand and calculating a similarity score defining a functional similarity between the first IR and the second IR by aggregating the adjusted probability score of the plurality of strands.
Owner:TECHNION RES & DEV FOUND LTD

IncRNA and disease association prediction method fusing heterogeneous network and graph neural network

The invention relates to the field of data mining in bioinformatics, in particular to an lncRNA and disease association prediction method fusing a heterogeneous network and a graph neural network. The method mainly comprises the following steps: (1) collecting related data; (2) calculating the semantic similarity of the disease, the target similarity of the disease, the sequence similarity of the lncRNA and the functional similarity of the lncRNA; (3) constructing a heterogeneous network net1 by using DDSsem, LLSfun, LDA, LMA and DMA; and constructing a heterogeneous network net2 by using the DDStar, the LLSseq, the LDA, the LMA and the DMS; (4) constructing a neural network model with an attention mechanism, extracting topological structure features in the network by an encoder part through GCN, and fusing the features between nodes, between graphs and between layers by using the attention mechanism; (5) constructing and training a BP neural network; (6) predicting by using the trained BP neural network; and (7) performing an experiment to verify the performance of the prediction model.
Owner:HUNAN UNIV
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