119 results about "Transient analysis" patented technology

The invention discloses a fire fighting system intelligent management method and device based on intelligent property management, and relates to the technical field of data management. The intelligent management method and device for the fire fighting system based on the intelligent property management comprises the following steps: S1, dynamically triggering and collecting a multi-source fire fighting data set through multiple protocols, and temporarily storing the multi-source fire fighting data set at the edge in a normalized manner; s2, constructing an event full-period window and a ternary association index of the event, the time sequence data and the original message; s3, performing double-track storage of the semantic analysis data and the original message, and constructing multi-dimensional index association; s4, reconstructing a visual playback alarm process through edge cloud increment synchronization and a multi-dimensional time sequence chain; and S5, performing transient analysis, protocol upgrading and responsibility evidence obtaining based on the cloud data collaborative link and the original message data set. According to the method, the complete acquisition of the fire-fighting data and the reproducibility of the event process are effectively improved, and the problem that in the prior art, only polling recording of single-point alarm is carried out, and an original message is discarded, so that the transient process and message-level evidence is lost is solved.

The invention belongs to the field of photovoltaic technology, and discloses a mountain photovoltaic array load analysis method considering a shielding effect, which comprises the following steps of: performing transient analysis (numerical method) on a photovoltaic array under the action of wind load, and then emphatically analyzing a first row of photovoltaic windward side and photovoltaic panels on the outermost periphery of the array; the pulsating pressure under the wind load is obtained, then whether the photovoltaic supports in the areas are intensified or not is evaluated and analyzed on the basis of the end, and the fatigue effect of the supports is mainly considered; and the other one is the influence of the shielding effect of the first row of photovoltaic panels on the back row of photovoltaic panels on the windward side of the array, so that the mountain photovoltaic array load can be accurately analyzed.

The invention relates to the technical field of new energy grid-connected control, in particular to a fault stage transient stability analysis method and system for a following-constructed network type converter series-parallel system, and the method comprises the steps: enabling a constructed network type converter to be equivalent to a controlled voltage source series impedance, enabling a following network type converter to be equivalent to a controlled current source, and enabling the controlled current source to be equivalent to a controlled voltage source series impedance; the whole series-parallel system is equivalent to a scene in which double voltage sources and a single current source are jointly connected in parallel to a PCC point, and a series-parallel system model is constructed; according to the series-parallel system model, respectively representing an active power coupling term of the network-building type converter and a voltage coupling term of the network-following type converter under the condition of considering parallel connection of the network-following type converter and the network-building type converter; according to the coupling term, remodeling an active loop control structure of the network-constructing converter and a phase-locked loop synchronization structure of the network-following converter, and obtaining a transient analysis model of the series-parallel system considering the coupling term; the transient stability of the hybrid system in the power grid fault stage is analyzed through the transient analysis model, and the influence on the transient stability is effectively represented.

The invention discloses a series-parallel system transient stability analysis and fault ride-through control method considering current limiting, and belongs to the field of power fault analysis. In order to reveal an action mechanism of a current amplitude limiting and converter coupling effect on the transient synchronization stability of the hybrid system, the method comprises the following steps: firstly, considering the influence of control mode switching of a constructed network type converter, and establishing a transient analysis model of the hybrid system considering a current amplitude limiting link; then, based on a phase plane method, analyzing an action rule of converter control parameters on system transient stability, determining an optimal active power reference value and a saturation current phase angle of the grid-forming converter during a fault period, and proposing a fault ride-through control strategy according to the optimal active power reference value and the saturation current phase angle; and finally, verifying the correctness of theoretical analysis and the effectiveness of the proposed control strategy through multi-working-condition simulation.

A calculation method for a transformer winding considering a frequency-dependent loss, comprising: according to simulation requirements, defining key parameters calculated by using a finite-difference time-domain (FDTD) algorithm; constructing an equivalent flat wire model in an FDTD grid; calculating frequency-dependent internal impedance per unit length of a flat wire; and on the basis of a vector fitting method and a time-domain convolution calculation method, substituting the frequency-dependent internal impedance into a time-domain equation of the FDTD algorithm for updating and iterative solving, so as to obtain an electromagnetic field calculation result. In the present invention, on the basis of the vector fitting method and time-domain convolution calculation, the impact of the frequency-dependent characteristics of an electromagnetic field distributed in a conductor on an electromagnetic transient process is accurately considered during the FDTD time-domain solving, so that the calculation accuracy and efficiency of conventional FDTD algorithms and even conventional cross-scale modeling techniques can be significantly improved, thereby carrying out the targeted electromagnetic transient analysis on the reliability, safety, and predictability of transformers, and achieving the early detection of potential faults and defects, or formulating targeted maintenance plans and repair schemes.

The invention discloses a transient stability analysis method, device and system for a new energy power system, and belongs to the technical field of new energy power generation, and the method comprises the steps: setting a network-type converter of the new energy power system as a voltage source in a normal state, and switching the network-type converter into a current source in a fault state; and representing a first transient analysis model corresponding to the grid-forming converter and a second transient analysis model corresponding to the grid-forming converter by using a curved surface, thereby determining respective power angle stable regions of the two converters, analyzing actual power angles of the new energy power system when different power grid voltages drop, observing power angle swing tracks of the converters, and calculating the power angle stability of the new energy power system. And therefore, transient weak converters corresponding to different power grid voltage sags can be accurately reflected. Compared with the prior art, the method can accurately describe the power angle stable areas of the grid-forming converters, simulates the new energy power system under various fault conditions, provides a powerful basis for preventing system instability in advance, and improves the operation reliability of the new energy power system.

The invention relates to a segmented fusion SPICE to IBIS model conversion method and system, and the method comprises the steps: obtaining data, precisely extracting voltage / current curve data from a simulation result of SPICE simulation, carrying out the transient analysis, guaranteeing that a finally generated IBIS model can accurately reflect the electrical behavior of the SPICE model, increasing the voltage / current sampling point density of DC scanning in the SPICE simulation, and obtaining the electrical behavior of the SPICE model. Particularly, in a non-linear severe change region, a segmentation interval is adaptively adjusted according to curvature change, so that the accuracy of curve data extraction is ensured; a compensation item is added in a [Model] section of the IBIS model to compensate the packaging parasitic effect, the accuracy of model conversion is improved, meanwhile, simulation data under the multi-PVT condition is compressed through PCA, redundant information is reduced, the model generation efficiency is improved, and high-precision and high-efficiency conversion from the SPICE model to the IBIS model is achieved.

The invention relates to the technical field of monitoring modeling, in particular to an electrostatic precipitation smoke emission dynamic modeling method based on multi-parameter coupling analysis, which comprises the following steps: calculating electric field rate and acceleration through sliding window difference, judging electric field abrupt change trigger parameter adjustment, normalizing particle size and charge density, and mapping disturbance intensity index. And calculating response delay and a gradient field to generate a disturbance coefficient, transferring a model weight when the disturbance exceeds a threshold value, performing fitting reconstruction, and performing regression weight reverse normalization to output a steady-state parameter group. According to the method, electric field dynamic characteristics are captured through equal-interval sampling in combination with a sliding window, an acceleration super-threshold model is constructed through second-order difference, a dynamic adjustment mechanism is triggered, particle size and charge density are normalized, disturbance intensity is mapped through linear interpolation, speed and density abrupt change are quantized through gradient weighting, and weight transfer and a least square method are introduced to reconstruct parameters. The transient analysis capability and robustness of the model are improved, and high-precision synchronous mapping of the emission trend and the equipment state is realized.

The application provides a floor grinding machine gear box guide plate structure parameter optimization design method, which is used for determining the optimal values of three radial clearances between the guide plate and the gear tooth top. Firstly, a parameterized gear box model containing clearance as a variable is constructed, and a gear oil stirring loss theoretical model is established based on the boundary layer theory and the fluid resistance theory; taking the maximum lubrication efficiency as the target and the oil stirring power loss not exceeding the set threshold as the constraint condition, a central composite design method is used to select representative sample points in the design space; through computational fluid dynamics simulation, a moving particle semi-implicit method is used for splash lubrication transient analysis to obtain performance data of each point; based on the simulation data, a high-precision proxy model is constructed; finally, under the condition of meeting the oil stirring power loss constraint condition, the maximum lubrication efficiency is taken as the target for optimization solving to obtain the optimal clearance combination. The method realizes the quantitative design from parameters to performance, and effectively replaces the traditional trial and error method.

The application provides an electromigration reliability non-uniform discrete equivalent circuit modeling method and system, adopts an equivalent circuit-based method to analyze electromigration stress evolution of a general complex interconnection structure, fully considers a thermal field effect in a model, realizes stress analysis equivalent circuit modeling under multi-physical field coupling, and solves the problem of waste of computing resources in processing large-span interconnection structures by using a traditional uniform discrete method, avoids unnecessary transient simulation on an immortal interconnection tree, reduces the computing load of full-chip-level analysis, and realizes efficient and high-precision transient analysis of electromigration reliability of a large-scale interconnection network under multi-physical field coupling effects.

The invention relates to the technical field of industrial data analysis, and discloses an original data feature analysis system in water meter detection, comprising: a pulse data aggregation unit for acquiring an original pulse time sequence; the time sequence difference processing unit is used for receiving the original pulse time sequence and executing first-order difference operation to generate a first-order time sequence difference value sequence; the feature decoupling shunting unit is used for executing logic locking by using a monitoring carrier environment baseline scalar, and dividing a first-order time sequence difference value sequence into a steady state processing channel and a transient analysis channel; the intrinsic mode mapping unit is used for pre-storing intrinsic mode feature vectors; the transient distortion judgment unit is used for extracting the frequency domain feature vector, executing orthogonal projection mapping with the intrinsic mode feature vector and outputting an effective transient distortion tensor, the problem of feature information entropy collapse of the high-frequency pulse sequential sequence in the dimensionality reduction aggregation process is solved, and a semantic gap between an information processing domain and a physical design domain is eliminated.

The application discloses a temperature rise determination method and determination device of a dry-type transformer. The temperature rise determination method of the dry-type transformer comprises the following steps: establishing a geometric model of the dry-type transformer; wherein the geometric model is determined by heat sources in the dry-type transformer; performing transient analysis on internal natural convection of the dry-type transformer according to the geometric model, and determining temperature change conditions of specific points in the dry-type transformer under different load rates; determining a transient temperature rise model of the specific points according to the change conditions, wherein the temperature rise model is a corresponding relationship model of temperature rise values of the specific points, load rates and working time; and determining the temperature rise values of the specific points in the working process of the dry-type transformer according to the transient temperature rise model, so that simulation images can be easily obtained through simulation software, and the temperature rise distribution conditions of the dry-type transformer under different load rates can be quickly obtained.

The invention belongs to the technical field of transient analysis of a new energy grid-connected system, and particularly relates to a transient overvoltage analysis method of a direct-driven wind power grid-connected system under an asymmetric fault, which comprises the following steps: acquiring three-phase asymmetric voltage and current, and constructing a positive and negative sequence dq control model of positive and negative sequence bisynchronization of a direct-driven wind power plant station; establishing a mapping relation with a symmetric component method, and determining a positive-sequence dynamic reactive current increment and a negative-sequence current suppression coefficient according to a converter control strategy; establishing sequence network boundary conditions under various asymmetric faults; enabling the direct-driven wind power plant to be equivalent to a frequency-related controlled sequence impedance source, and obtaining equivalent sequence impedance of the wind power plant; establishing a sequence network equation considering wind power dynamic support; calculating the current and sequence voltage of the fault point, and obtaining a three-phase voltage through symmetric component inverse transformation; and an overvoltage coefficient is calculated, and a quantitative relational expression between the overvoltage coefficient and the negative-sequence current suppression coefficient is established and applied. The method provides theoretical support for parameter setting and capacity planning of the wind power integration system.

The invention provides a mechanical arm event trigger control transient analysis and trigger controller design method based on response characteristics. The mechanical arm event trigger control transient analysis and trigger controller design method comprises the following steps that 1, a mechanical arm input and output response model is constructed; 2, system input serves as a piecewise function, and a trigger control transient relation is analyzed; and step 3, proposing a new time constraint event triggering strategy to avoid a sesame phenomenon. According to the method, the transient process is combined, the time constraint condition is introduced, the mechanical arm event triggering control strategy is established, the false triggering frequency is reduced, the sesame phenomenon is avoided, and the communication overhead is reduced.

The invention relates to the field of photovoltaic grid-connected management and control, in particular to an intelligent grid-connected management and control method and platform for a photovoltaic power station, and the method comprises the following steps: collecting the operation information of a target photovoltaic power station, carrying out the transient analysis, and constructing a transient operation state set; performing continuous time tracking on the transient operation state set to generate a photovoltaic evolution track; performing comprehensive change frequency analysis on the photovoltaic evolution track to obtain a change frequency matrix; synchronously acquiring operation parameters of a power grid side; performing grid-connected risk assessment on a change frequency matrix according to the power grid side operation parameters, and generating a grid-connected risk assessment value; grid-connected risk assessment is carried out based on the grid-connected risk assessment value, and when it is judged that the target photovoltaic power station meets the direct grid-connected condition, synchronous grid-connected processing is executed; when it is judged that the target photovoltaic power station does not meet the direct grid connection condition, grid connection power modulation is carried out, and intelligent grid connection management and control processing is completed. According to the invention, the safety and stability of photovoltaic power station grid connection are effectively improved.

The invention discloses a parallel solving method and system for a system of linear equations of an electric power system based on a Woodbury theory, and belongs to the technical field of large-scale electric power system computation.The method comprises the steps that a coefficient matrix of a network equation of the electric power system is obtained and subjected to block representation; performing truncated singular value decomposition on the non-diagonal block coupling matrix, and realizing low-rank decomposition through an Arnoldi iterative algorithm; carrying out inversion on the coefficient matrix based on a Woodbury matrix identical equation, and carrying out parallel calculation on each block sub-matrix and an intermediate variable; and solving the system of linear equations by using the inversed matrix. According to the method, the low-rank characteristic and parallel computing advantages of the inter-region coupling matrix of the power system are fully utilized, the solving efficiency of the large-scale linear equation set is remarkably improved, and the method is suitable for transient analysis, real-time simulation and other high-performance computing scenes of the power system.

The invention is suitable for the technical field of power system detection, and provides a grounding detection method and device and terminal equipment, and the method comprises the steps: obtaining the starting recording data of two protection devices under the conditions that a grounding fault occurs in an electrical primary system and the two protection devices start a protection mechanism; and then, under the condition that the steady-state phase voltages of the two protection devices are determined to be in a normal state according to the initial three-phase voltage effective values and the initial synchronous voltage effective values of the two protection devices, if it is detected that at least one of the two protection devices has voltage abrupt change, transient analysis is started. And finally, according to the head wave voltage data after the transient analysis of the two protection devices is started, determining an abnormal protection device with neutral point offset in the two protection devices. According to the method, the abnormal protection device with neutral point offset can be accurately positioned from the two protection devices, so that the detection efficiency is improved.

The application discloses an arc grounding overvoltage suppression simulation method and system based on a grounding fault point fast transfer technology, and belongs to the technical field of overvoltage suppression simulation. The application solves the problem of a large deviation between simulation results and actual values of a traditional arc grounding overvoltage suppression simulation method and system; an arc grounding overvoltage suppression simulation system circuit is built in an electromagnetic transient analysis software, and device parameters in the simulation system circuit are determined according to a general empirical formula and a conductor length; a MODEL module with an arc simulation model constructed according to a fitting equation between an arc and time is built, and device connection is performed on pins of the MODEL module; simulation is performed according to the set arc grounding overvoltage suppression simulation system circuit, and a MODEL module is adopted to control a fast grounding switch to send a closing instruction. The application effectively improves arc grounding overvoltage suppression simulation precision, and can be applied to arc grounding overvoltage suppression.

The invention provides a transient lubrication analysis method and system for a floating bush of a high-pressure fuel pump under the synergistic effect of cam shaft bending-torsional vibration and multiple friction pairs in order to solve the problems that the reliability, the efficiency and the service life of an engine are reduced due to the fact that a coupling mechanism of cam shaft vibration and floating bush lubrication in a marine diesel engine oil supply mechanism is not clear. Belongs to the technical field of high-pressure fuel pump camshafts. According to the method, a cam shaft bending-torsional vibration model integrating bending-torsional deformation is constructed, the synergistic effect of multiple friction pairs of a cam-roller and a floating bush is combined, a parallel transient lubrication analysis strategy is adopted, iterative solution including mechanical and thermal balance is carried out on each friction pair, oil film characteristic parameters are fed back to the bending-torsional vibration model to update boundary conditions, and the bending-torsional vibration of the cam shaft is obtained. And dynamic coupling convergence of system vibration and lubrication states is realized through time-marching iteration, and complete transient analysis of the cam-roller-roller pin system is completed. The method is suitable for designing a camshaft system of a marine diesel engine oil supply mechanism, and the operation stability of equipment can be effectively improved.

The application discloses a time delay calculation method, an electronic device and a storage medium, and comprises the following steps: constructing a reduced-order model of an interconnection line corresponding to a driver model and a receiver model, wherein the reduced-order model is provided with an impedance function corresponding to the driver model and a transfer function corresponding to the driver model and the receiver model; determining a driver output voltage waveform by using a preset step length and the impedance function; taking the driver output voltage waveform as input, determining a receiver input voltage waveform by using a preset time delay voltage threshold and the transfer function; determining an input conversion time corresponding to the receiver model by using the driver output voltage waveform and the receiver input voltage waveform, and then determining a time delay calculation result; that is, the application determines the corresponding driver output voltage waveform and the corresponding receiver input voltage waveform by using transient analysis combined with a composite current source model, and then analyzes and accurately calculates the time delay, so that the accuracy of the time delay calculation result can be effectively improved.

The invention discloses a full-power offshore wind turbine generator modular full-electromagnetic transient test method, which comprises the following steps: constructing a full-power fan monomer model, performing equivalent amplification on a fan internally adopting a multi-module parallel structure through a multiplication unit module based on the monomer model, obtaining an equivalent fan model, and establishing a working condition test module, by adjusting an input signal of an external power grid voltage source, the voltage amplitude, frequency and phase are controlled, and steady-state and fault working conditions under different power grid conditions are simulated; and finally, a control signal input and output relation is specified between the equivalent fan model and the working condition test module, so that modularized and extensible full-electromagnetic transient test is realized. According to the method, integrated, rapid and high-precision simulation of the single fan and multi-airport station-level modeling is realized, the modeling efficiency and example reusability are improved, and a standardized and modularized engineering technical scheme is provided for electromagnetic transient analysis of the wind turbine generator.

The invention relates to the technical field of product design and simulation, in particular to a sealing rubber strip abrasion state simulation evaluation method, device and equipment and a medium, and the method comprises the steps that geometric data of the section of a sealing rubber strip and the section of a corresponding metal plate are acquired, and a corresponding finite element analysis model is established based on the geometric data; applying a displacement amount corresponding to the target direction to the finite element analysis model to generate a corresponding pre-pressing analysis result, and adjusting the finite element analysis model according to the pre-pressing analysis result; and on the basis of the adjusted finite element analysis model, applying a movement speed to a sheet metal section rigid body to generate a corresponding dynamic transient analysis result, and evaluating the wear state of the sealing rubber strip according to the transient analysis result. Therefore, the problems that in the prior art, temporary remedial measures are generally adopted only after abrasion occurs, and the abrasion resistance cannot be fundamentally improved are solved.

The invention discloses an electric vertical take-off and landing aircraft demisting one-dimensional and three-dimensional coupling transient simulation analysis method, and belongs to the technical field of CFD simulation analysis, and the method specifically comprises the steps: firstly, building a one-dimensional simulation model S1 and a three-dimensional CFD simulation model S2; thirdly, coupling simulation is established for the one-dimensional simulation model S1 and the three-dimensional CFD simulation model S2, real-time circulation interaction of simulation data of the one-dimensional simulation model S1 and the three-dimensional CFD simulation model S2 is formed, demisting transient analysis is carried out, and the evaporation condensation flow process of a water mist layer on the surface of the windscreen of the aircraft is simulated; and then, whether the demisting performance of the air conditioning system meets the design requirement or not is evaluated according to the demisting transient analysis result. According to the method, the simulation requirement of the vertical take-off and landing aircraft in the internal and external circulation demisting function can be met, the actual demisting process is simulated, and the accuracy of demisting transient simulation analysis is improved.

This invention discloses a power grid risk early warning method based on digital twins, belonging to the field of power grid risk early warning technology. The method includes: firstly, integrating data from the power grid energy management system, production management system, and information security system to construct a digital twin base for the primary system physical model, the secondary system mechanism model, and associated operating modes; then, considering the virtual automatic voltage control constraint calculation baseline situation; subsequently, injecting hypothetical equipment faults, and linking the execution of electromechanical transient analysis, relay protection action prediction, standby automatic transfer action prediction, and power flow recalculation to form a predictive topology; further, combining power source backtracking and dynamic voltage difference calculation at both ends after virtual disconnection of tie switches, identifying single-source risks, risks from the same upstream power source, and risks of double circuits on the same pole. This method achieves unified extrapolation of power grid operating status, secondary device actions, and structural risks, improving the completeness, foresight, and targeted level of risk identification and response.

This invention discloses an efficient transient analysis method for electromagnetic-thermal-fluid multiphysics fields on integrated chips. Focusing on electromagnetic, thermal, and fluid fields as core research objects, and centering on typical scenarios of full electromagnetic-thermal-fluid coupling, it systematically integrates the governing equations, boundary conditions, and constitutive relations of each physical field to construct a unified set of coupled partial differential equations. Under the premise of verifying and satisfying the stability conditions of all physical field discretization schemes, simultaneous numerical solutions for the multiphysics fields are achieved through FDTD. This invention, through multi-faceted synergistic optimization, achieves comprehensive adaptation to complex structures, providing reliable technical support for solving various complex engineering multiphysics coupling problems.

This application relates to a strategy for improving the transient synchronization stability of a heterogeneous parallel system of VSG and GFL-ESS, including: obtaining the main circuit of the heterogeneous parallel system of VSG and GFL-ESS; determining the equivalent circuit structure of the heterogeneous parallel system of VSG and GFL-ESS based on the main circuit of the heterogeneous parallel system of VSG and GFL-ESS; constructing a transient analysis model of the heterogeneous parallel system of VSG and GFL-ESS based on the equivalent circuit structure of the heterogeneous parallel system of VSG and GFL-ESS; and determining the stable operation feasible region of the heterogeneous parallel system of VSG and GFL-ESS based on the transient analysis model. This application can, after a voltage drop in the distribution network, control the GFL-ESS to absorb active and reactive currents, thereby achieving transient power angle stability of the VSG while limiting its output current amplitude, ensuring stable grid-connected operation of the VSG during fault periods.

The invention discloses a lightning arrester regulation and control method and system based on transformer transient analysis and a medium. Relates to the technical field of transformer insulation. Performing transient analysis according to the full-wave intrusion simulation test process and the chopping intrusion simulation test process to construct a transformer full-wave intrusion transient set and a transformer chopping intrusion transient set; monitoring the overvoltage invading the transformer in real time, and for the overvoltage belonging to full-wave invasion, generating an inductance suppression strategy of the lightning arrester according to the full-wave invasion transient set of the transformer; according to the scheme, when the lightning arrester is conducted, the currently generated inductance suppression strategy is executed, insulation protection is performed on the transformer based on the lightning arrester provided with an adjustable inductance suppression unit used for suppressing sudden change of current, and the inductance suppression strategy of the lightning arrester is generated according to a transformer full-wave intrusion transient set and a transformer cut-wave intrusion transient set. Dynamic regulation and control of suppression intensity of current abrupt change are realized, and the problem of insulation matching mismatch between the transformer and the lightning arrester due to static characteristics of the lightning arrester is solved.

The invention relates to a steady transient analysis method and system for a submarine observation network power supply system, and belongs to the technical field of submarine observation networks. The method comprises the following steps: establishing a junction box converter system equivalent model, and carrying out cathode constant-voltage submarine observation network power supply system modeling by using the junction box converter system equivalent model so as to carry out stable and transient analysis on the submarine observation network power supply system; the junction box current transformation system equivalent model is an improved junction box current transformation system equivalent model, and the improvement is that an input side positive electrode of the junction box current transformation system is grounded, and an input side negative electrode is connected to a negative electrode constant-voltage seabed observation network submarine cable. The input side positive electrode of the junction box conversion system is grounded, and the input side negative electrode is connected to the negative electrode constant-voltage submarine observation network submarine cable, so that the loop impedance between the shore-based power supply output polarity and the junction box electric energy conversion system is calculated, and the influence on the overall stable transient analysis of the constant-voltage submarine observation network power supply system is further reduced; and the stable transient analysis requirement in the modeling of the power supply system is met.

This invention provides a non-uniform discrete equivalent circuit modeling method and system for electromigration reliability. It employs an equivalent circuit-based approach to analyze the electromigration stress evolution of general complex interconnect structures, fully considering thermal field effects in the model. This achieves equivalent circuit modeling for stress analysis under multi-physics coupling. Furthermore, by using an adaptive mesh method with non-uniform spatial discretization and a steady-state / quasi-steady-state filtering mechanism, it solves the problem of wasted computational resources in traditional uniform discretization methods when dealing with large-span interconnect structures, and avoids unnecessary transient simulations of immortal interconnect trees, reducing the computational load of full-chip-level analysis. This enables efficient and high-precision transient analysis of the electromigration reliability of large-scale interconnect networks under multi-physics coupling effects.

The application provides a myocardial microsphere transient analysis method and device. The method comprises the following steps: obtaining a myocardial microsphere video, using a segmentation method to obtain a myocardial microsphere region of each frame in the myocardial microsphere video, determining the position of all myocardial microspheres of each frame according to the myocardial microsphere region obtained by each frame, finding corresponding myocardial microspheres between frames according to the nearest distance of myocardial microspheres between frames, selecting a reference frame and calculating a jumping strength and a jumping speed by using a frame difference method and a maximum value projection method, and generating a jumping strength curve and a jumping speed curve respectively, determining each wave peak according to the jumping curve, calculating a frequency according to the wave peak, and performing transient analysis on each wave peak. The myocardial microsphere region in the video is extracted by using the segmentation method to be analyzed separately, and the effect of simultaneously analyzing multiple myocardial microsphere videos can be achieved. The maximum value projection of the frame difference method result is obtained first, then the reference frame is automatically selected, and then the frame difference method result is multiplied by the maximum value projection, so that the noise can be suppressed.