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95 results about "Atomic coordinates" patented technology

Atomic coordinate files are the data files that specify three-dimensional (3D) molecular structures. At a minimum, they must specify the positions of each atom in space, typically with X, Y and Z Cartesian coordinates, and the chemical element each atom represents.

Systems and methods for polymer sequence prediction

Systems and methods for polymer sequence prediction are provided. Atomic coordinates for at least the main chain atoms of a polypeptide comprising a plurality of residues is obtained and used to encode the residues into residue feature sets. Each residue feature set comprises, for the respective residue and for each neighboring residue within a nearest neighbor cutoff, an indication of secondary structure, a relative solvent accessible surface area of backbone atoms, and cosine and sine values of backbone dihedrals; a Cα to Cα distance of each neighboring residue; and an orientation and position of each neighboring residue backbone relative to the backbone residue segment of the respective residue. A residue in the plurality of residues is identified, and the corresponding residue feature set is inputted into a neural network comprising at least 500 parameters, thus obtaining a plurality of probabilities, including a probability for each naturally occurring amino acid.
Owner:ZYMEWORKS BC INC

Method for obtaining hydrogen solubility in slag through molecular dynamics simulation

The invention discloses a method for obtaining hydrogen solubility in slag based on microstructure analysis, and belongs to the field of high-temperature melt physical property characterization. The method comprises the following steps: determining initial components of a simulation system; establishing an initial structure model of the water molecule-containing slag system; determining a potential function for describing the simulation system; simulation calculation parameters are set, LAMMPS software is operated for simulation calculation, and simulation result data such as an atomic coordinate file and free energy of a simulation system are obtained; the atomic coordinate file is imported into visual software for statistical analysis and visual processing, and microstructure information of the slag is obtained; and calculating the hydrogen solubility of the slag according to simulation result data such as free energy. According to the method, the microstructure information of the atomic scale of the slag and the hydrogen solubility of the slag are calculated by adopting a molecular dynamics simulation method, so that the blank of experimental data can be filled, theoretical guidance is provided for controlling the hydrogen content of the slag, and a theoretical foundation is laid for controlling the hydrogen content of the molten steel.
Owner:NORTHEASTERN UNIV CHINA

Characterization of interactions between compounds and polymers using pose ensembles

Systems and methods for characterizing an interaction between a compound and a polymer include obtaining a plurality of sets of atomic coordinates. Each set of atomic coordinates comprises the compound bound to the polymer in a corresponding pose in a plurality of poses. Each respective set of atomic coordinates, or an encoding thereof, is sequentially inputted into a neural network, to obtain a corresponding initial embedding as output, thereby obtaining a plurality of initial embeddings. Each initial embedding corresponds to a set of atomic coordinates in the plurality of sets of atomic coordinates. An attention mechanism is applied to the plurality of initial embeddings, in concatenated form, to obtain an attention embedding. A pooling function is applied to the attention embedding to derive a pooled embedding. The pooled embedding is inputted into a model to obtain an interaction score of the interaction between the compound and the polymer.
Owner:ATOMWISE INC

Method for simulating and regulating rare earth ion clusters in laser glass based on molecular dynamics and application of method

The invention belongs to the field of glass material research, and discloses a method for regulating and controlling rare earth ion clusters in laser glass based on molecular dynamics simulation and application of the method. Based on given glass components, density and atomic number, an initial amorphous structure model M0 is constructed; based on a molecular dynamics theory, performing high-temperature melting quenching simulation on the initial amorphous structure model M0, and constructing a glass structure model M; calculating glass microstructure parameters and designing rare earth ion cluster parameters based on atomic coordinate information of the glass structure model M; establishing a glass component-microstructure mathematical model and a microstructure-rare earth ion cluster mathematical model based on the glass components, the microstructure parameters and the rare earth ion cluster parameters; based on the model, regulation and control on the agglomeration degree of the rare earth ions in the glass are realized. According to the method, the problem that the rare earth ion clusters in the laser glass cannot be quickly and effectively regulated and controlled due to the fact that the rare earth ion clusters in the glass are difficult to quantitatively describe by experimental means is solved.
Owner:SOUTH CHINA UNIV OF TECH

Multi-scale automatic analysis method for atomic structure of amorphous material

The invention relates to the technical field of computers, in particular to a multi-scale automatic analysis method for an amorphous material atomic structure. Comprising the following steps: S1, taking a reactant as an initial unit, and obtaining a cluster unit of a reaction product based on first principle molecular dynamics simulation; s2, carrying out unit cell construction on the cluster unit, and optimizing unit cell parameters and atomic coordinates of the cluster unit through calculation according to a first principle to obtain unit cell units; s3, spatial stacking is carried out on the unit cell units, unit cell parameters and atomic coordinates of the unit cell units are optimized through calculation according to a first principle, and supercell units are obtained; s4, performing first principle molecular dynamics simulation on the supercell unit to obtain an accurate machine learning potential function; s5, carrying out cell expansion construction on the supercell unit, carrying out molecular dynamics simulation by using an accurate machine learning potential function, and obtaining an amorphous material atomic structure; and S6, packaging the steps S1 to S5 into an automatic workflow. The method is high in efficiency and small in error.
Owner:NINGBO DIGITAL TWIN (EASTERN UNIV OF TECH) RES INST

Nucleic acid full-atom structure generation method and device, electronic equipment and storage medium

The invention provides a nucleic acid full-atom structure generation method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring an initial nucleic acid sequence containing a random sequence and a noise-added initial full-atom coordinate; inputting the initial nucleic acid sequence and the initial full-atom coordinate into a trained diffusion model to obtain a generated nucleic acid sequence and a generated full-atom coordinate output by the diffusion model; wherein the diffusion model is obtained based on sample nucleic acid structure training. According to the nucleic acid full-atomic structure generation method and device, the electronic equipment and the storage medium, the sequence and the full-atomic coordinates are diffused at the same time by applying the diffusion model, and the nucleic acid full-atomic structure generation method and device have the capacity of generating nucleic acid full-atomic coordinates from the beginning and controllably generating the nucleic acid full-atomic coordinates. In addition, a single model is used for completing the work of separately designing a plurality of models in the past, the design process is more concise, and the result is more credible.
Owner:ANHUI YUANGOU BIOTECHNOLOGY CO LTD

Wafer doping control method based on intelligent feedback regulation

The invention relates to the technical field of semiconductor manufacturing, and discloses a wafer doping control method based on intelligent feedback adjustment, and the method comprises the steps: carrying out the atomic scale imaging of the surface of a wafer, so as to recognize a target doping site, and generating an atomic coordinate mapping graph, secondly, inputting the atomic coordinate mapping graph into a multi-scale simulation model to generate an initial process parameter set, and processing the initial process parameter set by combining a transformer model with a reinforcement learning algorithm to obtain a dynamic process data matrix; performing optimization processing on the dynamic process data matrix through a cross-material process migration graph neural network to obtain a process parameter migration mapping relation, comparing measured data with a multi-scale model prediction result through closed-loop feedback iteration, and outputting a corrected process parameter migration mapping relation and a multi-scale model updating instruction; according to the wafer doping method, the stability, the consistency and the yield of the wafer doping process are improved, and high accuracy and high uniformity of wafer doping are realized.
Owner:ZHEJIANG LISHUI XIN WAFER SEMICON TECH CO LTD

Method for identifying molecular structure and constructing reaction network based on atomic coordinates

The invention discloses a method for identifying a molecular structure and constructing a reaction network based on atomic coordinates, and belongs to the technical field of material simulation. According to the method for recognizing the molecular structure based on the atomic coordinates, by obtaining trajectory data, atoms outside a box are converted into atoms inside the box through minimum mirror agreement; grids are divided according to a space truncation radius, potential bonding atoms are accurately screened, and redundancy of distance calculation between every two atoms of the whole system is avoided; atomic clusters are quickly divided in combination with depth-first search, and molecular structure recognition is achieved. The method only depends on basic data such as atomic coordinates and does not depend on a simulation software post-processing module, and the limitation that only a single simulation system is adapted in the prior art is broken through. According to the method for constructing the reaction network, molecular structure description is compared frame by frame, and invalid reactions are offset and filtered through positive and negative reactions to obtain net reactions; counting the net reaction times to determine the reaction probability so as to quantify the tendency of the reaction; and constructing a reaction network by taking the molecular structure as a node and the reaction frequency as an edge weight.
Owner:ROCKET FORCE UNIV OF ENG

Three-dimensional molecular structure generation method, device, equipment and storage medium

Embodiments of the present application provide a three-dimensional molecular structure generation method, device, equipment and storage medium, at least applied to the field of artificial intelligence and the field of drug synthesis, wherein the method comprises: obtaining atomic type noise and atomic coordinate noise at a current time step; constructing a full connection adjacency matrix based on the atomic type noise; performing three-dimensional isometry processing on the atomic type noise, the atomic coordinate noise and the full connection adjacency matrix to obtain a molecular structure distribution average value at the current time step; generating a molecular structure of the molecule iteratively based on the molecular structure distribution average value at the current time step to obtain a molecular representation of the molecule; and constructing the three-dimensional molecular structure through the molecular representation. Through the present application, the efficiency of three-dimensional molecular structure generation can be accelerated and cumulative errors can be avoided, so as to accurately generate a three-dimensional molecular structure of an effective molecule.
Owner:TENCENT TECHNOLOGY (SHENZHEN) CO LTD

Molecular property prediction method, system, device and equipment

The invention relates to the field of artificial intelligence, in particular to a molecular property prediction method, system, device and equipment, and the method comprises the steps: firstly obtaining 3D molecular structure data containing atomic coordinate information; according to the set radius alpha and the filling value sigma, zero-dimensional, one-dimensional and two-dimensional simplex structures are extracted, and substructure position coding information is calculated; then, taking one-dimensional and two-dimensional simplex structures as atomic feature indexes, and fusing atomic topology and atomic features; on the basis of zero-dimensional simplex structure and substructure position coding, obtaining pairing position coding information of an atom-simplex pair; inputting the fused atomic features and pairing position coding information into a multi-head self-attention module to generate global molecular features; and finally, obtaining a molecular property prediction result according to the global molecular characteristics. According to the method, the defect of processing fine-grained substructure information in the prior art can be effectively solved, and the 3D molecular property prediction performance is greatly improved.
Owner:SUZHOU CITY UNIV

A visualization system for large-scale quantum chemistry

The present invention relates to the fields of chemistry and materials science, and discloses a visualization system for large-scale quantum chemistry, which calculates the energy information of each structure in the calculation system, and finds the minimum-energy structure in the system as the optimized structure by means of gradient descent, and displays the structures before and after optimization in the form of an atomic coordinate matrix for easy visualization; at the same time, it can also obtain information such as charge density, differential charge density tensor, difference tensor, etc. according to the energy information of the structure, and draw visual images by using these information.
Owner:UNIV OF SCI & TECH OF CHINA

Molecular motion trajectory generation method, device, terminal and storage medium

The present invention discloses a method, device, terminal and storage medium for generating molecular motion trajectories, and relates to drug discovery technology. The method comprises: using a pre-trained generative model, generating the atomic coordinate information of several subsequent frames frame by frame for the atomic category sequence of the target protein-ligand complex and the atomic coordinate information of the first frame; the pre-trained generative model is trained based on the escape trajectory of an existing protein-ligand complex; and generating the molecular motion trajectory of the target protein-ligand complex according to the atomic category sequence of the target protein-ligand complex and the atomic coordinate information of all frames. The present invention simulates the molecular motion trajectory by adopting a paradigm of generating coordinates frame by frame by a generative model, and learns the inter-frame coordinate evolution law of the ligand in the process of escaping the protein pocket through the existing escape trajectory. In the inference stage, it is only necessary to input the atomic category sequence and the atomic coordinate information of the initial state of the first frame, and the atomic coordinate information of the subsequent frames can be iteratively generated quickly and accurately.
Owner:GUANGDONG-HONG KONG-MACAO GREATER BAY AREA DIGITAL ECONOMY RESEARCH INSTITUTE (INTERNATIONAL ADVANCED TECHNOLOGY APPLICATION PROMOTION CENTER (SHENZHEN)

Wafer doping control method based on intelligent feedback adjustment

The application relates to the technical field of semiconductor manufacturing, and discloses a wafer doping control method based on intelligent feedback adjustment, which comprises the following steps: atomic scale imaging is performed on the surface of a wafer to identify target doping sites and generate an atomic coordinate mapping diagram, the atomic coordinate mapping diagram is input into a multi-scale simulation model to generate an initial process parameter set, a dynamic process data matrix is obtained by combining a transformer model with a reinforcement learning algorithm to process the initial process parameter set, then, the dynamic process data matrix is optimized by a cross-material process migration graph neural network to obtain a process parameter migration mapping relationship, and measured data and multi-scale model prediction results are compared through closed-loop feedback iteration and output of a corrected process parameter migration mapping relationship and a multi-scale model update instruction. The application improves the stability, consistency and yield of wafer doping processes, and realizes high precision and high uniformity of wafer doping.
Owner:ZHEJIANG LISHUI XIN WAFER SEMICON TECH CO LTD

Method for screening local vibration mode of atomic system

The invention discloses a method for screening local vibration modes of an atomic system. The method comprises the following steps of: 1, acquiring an atomic structure file, a target atomic coordinate file and a feature vector file containing a real part and an imaginary part of vibration displacement of each atom; 2, analyzing the coordinate file to extract lattice basis vectors, atomic coordinates and element information; 3, fusing the real parts of the feature vectors to generate a total vibration vector file of each atom in a frequency domain; step 4, generating visual vibration data based on the atomic structure and the total vibration vector; 5, setting an incident light direction, extracting a vibration component in the direction, and generating a transitional vibration vector in combination with the coordinate file; step 6, selecting frequency and fusing transitional vectors to generate Raman / infrared spectrogram data; and step 7, optimizing the spectrogram through Gaussian broadening to complete screening. According to the invention, vector synthesis can be carried out on the displacement of each atom in each direction under different frequencies and visual display is carried out, so that atom vibration can be observed more visually.
Owner:YANCHENG INST OF TECH

Method for determining resolution of RNA heterogeneity in three-dimensional structure of RNA

The invention discloses a method for determining RNA heterogeneity in a three-dimensional structure of RNA, which comprises the following steps: S3, purifying folded RNA, freezing, preparing a sample, vitrifying, and evaluating under a freezing electron microscope to obtain a carrier net with optimal ice thickness and uniform particle size and distribution; s4, the grid carries out small-amount data collection, data processing is paused after two-dimensional (2D) classification is completed so as to carry out preliminary evaluation, if the preliminary evaluation has obvious RNA characteristics, large-scale cryoelectron microscope data collection and subsequent data processing are carried out so as to solve RNA heterogeneity, and if the preliminary evaluation does not have obvious RNA characteristics, large-scale cryoelectron microscope data collection and subsequent data processing are carried out so as to solve RNA heterogeneity; if not, trying different RNA preparation and / or vitrification conditions to obtain an optimized RNA sample, carrying out small-amount data collection again until obvious RNA characteristics exist, carrying out large-scale cryoelectron microscope data collection, and then carrying out data processing to solve RNA heterogeneity; and S5, most RNA experiences conformational changes when executing functions, and the conformational changes are separated more effectively by combining a standard cryoelectron microscope data processing flow and a three-dimensional classification algorithm. The present invention assists in implementing cryo-EM structure assays, assisted by a cryo-EM data processing flow, to parse RNA dynamics and conformational variations, and an RNA modeling algorithm to generate atomic coordinates based on a medium to high resolution cryo-EM density map.
Owner:SICHUAN UNIV

Implementation of density functional theory on quantum computing through meta generalized gradient approximation

The disclosure relates generally to methods and systems for implementation of density functional theory on quantum computing through meta generalized gradient approximation (meta GGA). Conventional methods implement DFT simulations on classical processors which is time consuming. The present disclosure provides a quantum circuit for computing the direct matrix efficiently on a quantum processor. Initially, a plurality of atomic coordinates of each atom of a chemical compound whose one or more properties are to be extracted, are obtained. Electron integrals, a core Hamiltonian, and a collocation matrix are computed from the plurality of atomic coordinates. The core Hamiltonian is diagonalized to obtain an initial density matrix of the chemical compound. The initial density matrix is further updated iteratively until a convergence criteria is satisfied using the meta GGA to obtain a final density matrix. The final density matrix is used to extract the one or more properties of the chemical compound.
Owner:TATA CONSULTANCY SERVICES LTD

Method for automatically analyzing atomic structure of amorphous material on multiple scales

The present application relates to the technical field of computers, and relates to a kind of amorphous material atomic structure multiscale automatic analysis method. Including: step S1: with reactant as initial unit, based on first principle molecular dynamics simulation obtains the cluster unit of reaction product;Step S2: the cluster unit is constructed, and its cell parameters and atomic coordinates are optimized using first principle calculation, to obtain cell unit;Step S3: the cell unit is stacked in space, and its cell parameters and atomic coordinates are optimized using first principle calculation, to obtain supercell unit;Step S4: the supercell unit is simulated by first principle molecular dynamics, to obtain accurate machine learning potential function;Step S5: the supercell unit is constructed by cell expansion, and the molecular dynamics simulation is carried out using accurate machine learning potential function, to obtain amorphous material atomic structure;Step S6: steps S1 to S5 are packaged into automation workflow. The method is efficient, and the error is small.
Owner:NINGBO DIGITAL TWIN (EASTERN UNIV OF TECH) RES INST

A method and device for initial path insertion of transition state based on homogeneous coordinate transformation matrix

ActiveCN117352076BAccurate insertion pointAccurate interpolationInternal combustion piston enginesChemical processes analysis/designCoordinate changeChemical reaction
A method and device for inserting points in the initial path of a transition state based on a homogeneous coordinate change matrix, the method comprising: S1. Structural optimization of the initial state and final state of a chemical reaction, obtaining reasonable structural files of the initial state and final state of the reaction and placing them under the current path of the script; S2. Identifying the structural files of the initial and final states of the reaction, the reaction atom serial numbers, the total number of insertion points in the transition state, and the number of steps in the activation stage; S3. Reading and dividing the atomic coordinate data in the structural file, and storing the atomic coordinates in the form of a two-dimensional array, namely an IS coordinate matrix and a FS coordinate matrix; S4. Calculating the atomic coordinate data of each step of the reaction in the activation stage; S5. Calculating the atomic coordinate data of each step of the reaction in the reaction stage; S6. Linearly interpolating all atoms to obtain the original atomic coordinate data of the transition state; S7. Overwriting the original transition state coordinate data with the atomic coordinate data of the activation stage and the atomic coordinate data of the reaction stage to generate the final initial path of the transition state.
Owner:ZHEJIANG UNIV OF TECH

Molecular dynamics simulation method for tensile testing of heterogeneous composition refractory CuNb amorphous alloy

The present invention describes a molecular dynamics simulation method for tensile testing of a refractory CuNb amorphous alloy with heterogeneous components. The specific steps are: establishing a CuNb crystal alloy model with uniform component distribution; using an EAM potential function to describe the atomic interaction between Cu and Nb; simulating the process of rapid heating and rapid cooling of the model to obtain a uniform CuNb amorphous alloy model, and outputting atomic coordinates; shearing and combining uniform amorphous alloy models with different atomic ratios to establish a series of amorphous alloy tensile models with different component distributions; performing tensile simulation on the amorphous alloy tensile model to output atomic information under different strains; visualizing the atomic information under different strains to output the deformation morphology, strain cloud map, stress cloud map and atomic cluster distribution map of the amorphous alloy tensile model under different strains; revealing the plastic deformation mechanism of the refractory CuNb amorphous alloy and the influence mechanism of component distribution on the tensile deformation of the refractory CuNb amorphous alloy.
Owner:CHINA UNIV OF MINING & TECH

A multi-descriptor and coordinate reversible mapping atomic clustering analysis method and system

The application relates to a multi-descriptor and coordinate reversible mapping atomic clustering analysis method and system, which comprises the following steps: inputting a set of multiple descriptors representing atomic arrangement characteristics; selecting single descriptor data or comprehensive descriptor data obtained by multi-descriptor weighted combination according to system characteristics by a user; performing clustering analysis on the selected descriptor data, and generating descriptor data grouping and a sample index set corresponding to each group; extracting the Coulomb matrix of each sample in each group from the set of multiple descriptors based on the sample index set of each group, forming a Coulomb matrix subset of each group and respectively calculating the Coulomb matrix mean value; and applying a multi-dimensional scaling algorithm to reduce the Coulomb matrix mean value of each group to a three-dimensional space to generate corresponding three-dimensional atomic coordinates of each group. Compared with the prior art, the application improves the analysis capability of atomic or molecular arrangement characteristics in the data of simulation outputs such as molecular dynamics.
Owner:SHANGHAI UNIV

Training method and device of crystal property prediction model and computer device

The application relates to a training method and device of a crystal property prediction model and a computer device. The method comprises the following steps: obtaining a sample crystal and a property label corresponding to the sample crystal; the sample crystal comprises a plurality of sample atoms; determining respective atomic coordinates of each sample atom, and determining orbital characteristics of the sample atoms according to the atomic coordinates; determining respective atomic potential energies of the sample atoms according to the orbital characteristics, and determining a predicted property corresponding to the sample crystal according to the atomic potential energies; training the crystal property prediction model according to the difference between the predicted property and the property label, stopping when a first training stop condition is reached, and obtaining a trained crystal property prediction model; and the trained crystal property prediction model is used to determine the property of the crystal. The method can improve the accuracy of predicting the property of the crystal.
Owner:SHENZHEN INST OF ARTIFICIAL INTELLIGENCE & ROBOTICS FOR SOC +1

Intelligent prediction method of covalent crystal structure based on topological assembly of molecular motifs

The application discloses a kind of covalent crystal structure intelligent prediction method based on molecular unit topological assembly, by regarding molecular unit as rigid body and using hybrid gene coding system, topological connection and geometric pose decoupling are realized, compared with traditional atomic coordinate random search, the application can keep the internal configuration of molecule stable during evolution, avoid the collapse of geometric configuration of complex molecule during search process, and improve the calculation efficiency of large-scale, non-spherical molecular system;The method does not depend on specific empirical parameters, and can cover the structure prediction of fullerene polymer, covalent organic framework and complex porous material through general topological assembly logic, and has strong cross-field universality.
Owner:NANJING UNIV OF SCI & TECH

Method, system, medium, terminal and program product for acquiring electron density information based on machine learning

PendingCN122264002AQuantum computersPhysical realisationHeterojunctionQuantum transport
The application provides an electron density information acquisition method, system, medium, terminal and program product based on machine learning. The method comprises the following steps: first, constructing a real differential density according to a real electron density and a reference electron density; inputting atomic species, atomic coordinates, cell information and uniform grid definition information of a target structure into a machine learning model for training, and taking the real differential density as a supervision target during the training to construct a differential density prediction model; deploying the constructed differential density prediction model to output a predicted differential density of a to-be-tested complex structure according to to-be-tested complex structure information; and performing a recovery operation on the output predicted differential density to obtain total electron density information of the to-be-tested complex structure. The application can acquire electron density information of a complex structure with high precision and high efficiency, and stably support downstream calculations such as photoelectric properties and quantum transport of heterostructures, interface structures and device structures.
Owner:SHANGHAI TECH UNIV

Protein binding conformation prediction method and system

The invention relates to a protein binding conformation prediction method and system. The protein binding conformation-based prediction method comprises the following steps: acquiring a static structure file of a target protein, and extracting atomic information to construct a residue index table; performing standardization processing on the atomic coordinates in the residue index table, and calculating a distance matrix between the residue pairs based on the standardized atomic coordinates; based on the conformation sampling data and the residue index table, obtaining a residue motion freedom degree through adaptive weighting calculation and correlation correction; a dynamic distance threshold value is obtained based on the residue motion freedom degree; converting the distance matrix into a binary contact graph based on the dynamic distance threshold, obtaining the contact frequency of the residue pair, and constructing a contact frequency matrix; extending the residue motion degree of freedom into a symmetric matrix, and fusing the contact frequency matrix and the symmetric matrix to obtain an initial dynamic probability matrix; performing normalization processing and probability propagation on the initial probability matrix in sequence to obtain a dynamic probability matrix; protein binding conformations are predicted based on the dynamic probability matrix.
Owner:DIVAMICS INC

Molecular motion trail generation method and device, terminal and storage medium

The invention discloses a molecular motion trail generation method and device, a terminal and a storage medium, and relates to a drug discovery technology. The method comprises the following steps: generating atomic coordinate information of a plurality of subsequent frames frame by frame according to an atomic category sequence of a target protein-ligand compound and atomic coordinate information of a first frame through a pre-trained generation model; the pre-trained generation model is obtained by training based on the escape trajectory of the existing protein-ligand compound; and according to the atom category sequence of the target protein-ligand compound and the atom coordinate information of all frames, generating a molecular movement track of the target protein-ligand compound. According to the method, a normal form of generating coordinates frame by frame is adopted to simulate a molecular motion track, and an inter-frame coordinate evolution rule of a ligand in an escape protein pocket process is learned through an existing escape track. In the reasoning stage, the atomic coordinate information of the subsequent frames can be rapidly and accurately iteratively generated only by inputting the atomic category sequence and the atomic coordinate information of the initial state of the first frame.
Owner:GUANGDONG-HONG KONG-MACAO GREATER BAY AREA DIGITAL ECONOMY RESEARCH INSTITUTE (INTERNATIONAL ADVANCED TECHNOLOGY APPLICATION PROMOTION CENTER (SHENZHEN)

Molecular dynamics calculation methods and systems based on quantum simulation

This invention discloses a molecular dynamics calculation method and system based on quantum simulation. The method first applies a discrete quantum Fourier transform to the atomic coordinates of the molecular system, mapping the original plane wave basis to a system containing only O(N) atoms. 2 The invention constructs a plane-wave bibasic quantum mechanics equation; then, it constructs and solves the electronic structure Hamiltonian on a quantum computer to obtain the ground state energy. This quantum energy is combined with the classical empirical potential energy according to predetermined weighting coefficients to calculate the total synthesized energy, from which the atomic forces are determined. The integration time step is then adaptively adjusted based on a comparison of the quantum energy change between consecutive time steps with a preset threshold. This adaptive mechanism shortens the time step to ensure accuracy when quantum effects are significant, and lengthens the step to improve efficiency when changes are gradual. This invention significantly reduces Hamiltonian complexity, balancing quantum accuracy and classical efficiency, and is applicable to various fields such as drug screening, materials design, and catalytic reaction simulation.
Owner:TIANJIN UNIV

A method for analyzing glass phase separation based on molecular dynamics simulation

The present invention discloses a method for analyzing glass phase separation based on molecular dynamics simulation. The method comprises the following steps: constructing an amorphous initial structure model of the glass; selecting a potential function for the interaction forces between the atoms of the glass according to the types of the initial glass atoms, and performing correction processing to obtain a corrected potential function; using the corrected potential function to evolve the amorphous initial structure model into a glass structure, and collecting the atomic coordinate information of the glass structure; inputting the atomic coordinate information into the visualization software VMD to obtain a glass phase separation structure diagram, and further obtaining the microscopic structure information of the glass phase separation. Based on the molecular dynamics theory, the present invention obtains the structural phase separation information at the atomic level of the glass through the molecular dynamics simulation method, makes up for the deficiency that the experimental research cannot achieve the atomic-level structure analysis, helps to more accurately understand the glass structure phase separation behavior, and regulates the glass phase separation.
Owner:SOUTH CHINA UNIV OF TECH

A method for constructing a molecular dynamics model of monolayer molybdenum disulfide containing point defects

The invention discloses a method for constructing a molecular dynamics model of monolayer molybdenum disulfide containing point defects. First, an atomic coordinate is obtained by constructing a molecular dynamics model of defect-free monolayer molybdenum disulfide through the open-source software LAMMPS. Secondly, the coordinate relationship between defective atoms is obtained by analyzing the atomic defect forms of six kinds of point-defect molybdenum disulfide, and a program for processing the atomic coordinates of six kinds of point-defect molybdenum disulfide is obtained through programming according to the coordinate relationship between atoms. Finally, the atomic coordinates of defect-free monolayer molybdenum disulfide are imported into the program for operation, and a molecular dynamics model of monolayer molybdenum disulfide with specific defects and specific defect concentrations is obtained, providing a reference for the modeling of point-defect molybdenum disulfide in the study of various properties of monolayer defective molybdenum disulfide at the nanoscale.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method for exploring influence of electromagnetic waves on protein structure directly based on molecular dynamics simulation

The invention discloses a method for exploring the influence of electromagnetic waves on a protein structure directly based on molecular dynamics simulation. The method comprises the following steps: acquiring target protein from a protein database; constructing a simulation system; adding a protein force field and a water molecule model; solvent molecules and ions are added to neutralize system charges, and energy minimization treatment is carried out; pre-balancing is carried out under the NVT ensemble and the NPT ensemble; performing molecular dynamics simulation on the simulation system, and storing an atomic coordinate trajectory; and performing post-processing on the track file, extracting distance time sequence data between atoms or residues, screening out atom pairs or residue pairs meeting conditions, performing Fourier transform analysis, and judging whether the possibility of resonance with the electromagnetic wave with the specific frequency exists or not. According to the method, the interaction between the protein and the electromagnetic field can be revealed under the atomic resolution without consumption of experimental materials, and an efficient and reliable molecular-level theoretical basis is provided for evaluating the biological effect of environmental electromagnetic radiation.
Owner:SHANGHAI UNIV OF MEDICINE & HEALTH SCI