85results about How to "Simplify the simulation process" patented technology

The invention provides a method for simulating a wind-wave coupling load value of a lower structure of a large-span bridge, which solves the multiple coupling problems of interaction of the environment and the structure from the three aspects of coupling of the wind and the wave, coupling of the wind and the structure and coupling of the wave and the structure in a simulation process. The method comprises the following steps of firstly, implementing synchronous coupling simulation in time domains of two random processes of the wind and the wave through coupling of a pulse wind speed spectrum and a wave frequency spectrum; secondly, implementing coupling simulation of the wind and the structure through the pulse wind speed spectrum of the peripheral wind field of a Reynolds stress tensor correction structure; lastly, implementing coupling simulation of the wave and the structure through an MacCamy-Fuchs diffraction theory. The method comprehensively applies a computational fluid dynamics (CFD) method, a fast Fourier transform (FFT) method, a proper orthogonal decomposition (POD) method and a frequency interpolation method, and the method has the advantages of high computational efficiency, simple simulation process and clear physical significance and can be popularized to simulation of the wind-wave coupling load value of the other ocean-like structures.

The invention relates to an equipment automation design and development platform and discloses a method for realizing online configuration, running and debugging of an algorithm. The integration of a programming development environment based on an IEC61131-3 control policy comprises distributed algorithm scheduling of algorithm block packaging, data driving and event triggering, and online configuration, running and debugging of the algorithm are controlled. The method comprises the following steps of (1) basic algorithm block running; (2) basic algorithm block packaging; (3) program running; (4) data driving; and (5) event triggering. The method has diversity, flexibility and reliability, ensures the adaptability, usability and stability of an algorithm program, and enables the extension of industrial algorithm libraries in multiple fields to be very convenient. Through designing institutes, device manufacturers, engineering companies and industrial users, expert knowledge and engineering experience are extracted, control algorithm libraries in the multiple fields are continuously enriched, and professional personalized demands in the multiple fields are met.

The invention relates to the technical field of traffic simulation, in particular to a real-time traffic simulation analysis system and method based on internet big data. The real-time traffic simulation analysis system comprises a data storage module, a data processing module, a simulation management module and a user terminal module, wherein the data storage module is used for preparing and storing the internet big data, and the data storage module is used for receiving the information from the internet big data, a detector, an artificially designed simulation scheme and the simulation basicdata; the input data comprises the static data and the dynamic data, and the data processing module is used for data preprocessing, data analysis, data fusion and data conversion. According to the present invention, the traditional OD backstepping, shortest circuit solving and other methods are broken through, the simulation process is simplified, the authenticity and accuracy of simulation are improved, and the problems that in the prior art, traffic simulation can be achieved only by depending on the historical and offline data, and a simulation core model and algorithm cannot form the benign interaction with the big data, are solved.

The invention discloses a mixing degree extracting method for a missile-borne non-ideal staring spotlight SAR(synthetic aperture radar). The method comprises the following steps of: computing a vertical distance h between a underground wave beam centre intersection distance and a ground distance through a given initial height H0 and initial mixing degree M0; determining an ideal staring point formed in the wave beam centre according to a known starting point, incident angle and squint angle; determining a trace point position corresponding to a staring point by combining the incident angle and the squint angle according to a known non-ideal staring coordinate, directional speed and time the non-ideal staring point appears; computing the mixing degree according to the obtained trace point height; and respectively mapping the ground non-ideal staring points onto a missile movement trace according to the obtained result, and respectively computing the corresponding mixing degree so as tofit the corresponding time-varying mixing degree expression M(t)=f(t). The mixing degree extracting method can be effectively applied to various complex missile traces, simplifies the simulation process, and lays a foundation for subsequent system performance analysis and imaging quality analysis and compensation.

The invention provides a vibration test simulation system and method for a slender aircraft, and aims to realize simulation of a random vibration test and improve simulation efficiency. The system comprises a preprocessing module, a finite element modeling module, a condition setting module, an analysis calculation module, a result processing module and a test database; and software involved by the five modules and the test database is integrated in the simulation system. The method comprises the steps of selecting aircraft, vibration table and clamp geometric models, writing a simulation algorithm file in a .m format, determining a control spectrum, inputting known data of the spectrum, and establishing model correction standards; processing the geometric models, the simulation algorithm file and the known data of the control spectrum; performing finite element modeling on the geometric models; setting a control mode and control point positions; reversely calculating a load loaded to the vibration table model; verifying the reversely calculated load; and performing comparison on mean square root errors between response spectrum type data and control spectrum type data of monitoring points to obtain an optimal control point position.

The invention relates to a simulation method and system for a flexible direct current power transmission device. The method comprises the following steps that: obtaining the reactance and the voltageof a bridge arm, the capacitance of a submodule and a submodule number in the bridge arm; on the basis of the reactance of the bridge arm, the capacitance of the submodule, the submodule number in thebridge arm and a pre-established modularized multi-level current converter model, simulating the flexible direct current power transmission device, and obtaining flexible current and electromechanical transient state operation characteristics under different working conditions of a direct current power grid; and constructing the pre-established modularized multi-level current converter model through a main circuit parameter, an alternating current side equivalent voltage source control quantity and a direct current side controllable current source control quantity.

The invention discloses an oil-gas well shaft corrosion simulation evaluation system. The oil-gas well shaft corrosion simulation evaluation system comprises an oil casing pipe evaluation module, a corrosion coupon module, a scaling evaluation module, an electrochemical corrosion probe module and a double-layer circulation pipeline, wherein the oil casing pipe evaluation module, the corrosion coupon module, the scaling evaluation module and the electrochemical corrosion probe module are all connected with the double-layer circulation pipeline; the oil casing pipe evaluation module is used forfluid scouring simulation of an oil casing pipe and an inner coating of the oil casing pipe; the corrosion coupon module is used for dynamic scouring corrosion simulation of fluid; the scaling evaluation module is used for scaling simulation of the oil casing pipe; and the electrochemical corrosion probe module is used for electrochemical corrosion simulation of the oil casing pipe. The oil-gas well shaft corrosion simulation evaluation system can simulate the corrosion scaling factors such as the fluid flow speed, pressure and temperature in the shaft environment, can be used for conducting oil casing pipe corrosion rate testing, corrosion behavior and corrosion mechanism research, anti-corrosion measure effect evaluation, corrosion inhibitor optimization, scale inhibitor optimization, non-compatible fluid scaling condition research and the like, and provides an effective evaluation means for anti-corrosion and anti-scaling work of an oil-gas well.

The invention provides a traffic noise dynamic simulation method by combining a cellular automaton traffic flow model. The method is suitable for dynamic simulation calculation of road traffic noise. The method comprises a traffic flow simulation module, a vehicle noise discharge calculation module and a noise propagation attenuation calculation module, wherein the traffic flow simulation module is realized through the cellular automaton traffic flow model. The method comprises the following calculating steps: carrying out dynamic simulation on road traffic flow through the traffic flow simulation module; inputting vehicle type, speed and accelerated speed obtained through traffic flow simulation into the vehicle noise discharge calculation module to carry out vehicle noise discharge calculation, and meanwhile, inputting vehicle position parameter obtained through traffic flow simulation into the noise propagation attenuation calculation module to calculate attenuation amount; and finally, obtaining a noise value of a receiving point by combining the calculation results of the vehicle noise discharge calculation module and the noise propagation attenuation calculation module. The method greatly simplifies traffic flow simulation process and has the advantages of small calculation amount and accurate and reliable simulation calculation result.

The invention discloses a signal control crossing traffic noise probability prediction method based on Monte Carlo simulation. The method is suitable for dynamic simulation calculation of traffic noise at a signal control crossing for a pedestrian to cross a street. A calculation process is as follows: firstly, a Monte Carlo simulator of a traffic flow of a signal control crossing is used to simulate a data set formed by parameters including vehicle numbers, vehicle types, positions and speeds of a road at a series of time points; then the data is input into a vehicle noise discharge probability model, and a vehicle noise source intensity and a position data set are obtained; and finally, with a noise propagation attenuation calculating model combined, noise values of a series of receiving points are obtained, so that the noise probability distribution is obtained through statistics. The method substantially simplifies the process of traffic flow simulation, is simple in modeling and small in computational complexity, and generates accurate and reliable simulation calculation results.

The invention belongs to the technical field of aircraft simulation, and particularly relates to a method for determining the dynamic response of an elastic aircraft. The method comprises the following steps: S1, determining the aerodynamic resistance, lift force and pitching moment of a rigid body of the aircraft at the current moment; S2, determining modal coordinate dynamic response of elastic vibration of the aircraft according to the gust speed; S3, determining rigid body aerodynamic force correction caused by elastic deformation of the aircraft according to the modal coordinate dynamic response; S4, correcting the aerodynamic resistance, the lift force and the pitching moment of the rigid body in the step S1 based on the aerodynamic force correction of the rigid body to obtain corrected aerodynamic resistance, lift force and pitching moment of the aircraft; and S5, performing dynamic response solution on the aircraft according to the corrected aerodynamic resistance, lift force and pitching moment of the aircraft, updating the aerodynamic attack angle, elevator skewness and gust speed at the next moment based on a solution result, and returning to the step S1 for iterative calculation until simulation is finished. According to the invention, the simulation precision is improved.

The embodiment of the invention discloses a bogie rapid simulation method and device, which are used for simplifying the simulation process of the bogie and improving the simulation efficiency and accuracy. The method provided by the embodiment of the invention comprises the steps that firstly, standard and normative working condition content of the bogie industry is obtained; then, the standard working condition contents are packaged; rapid simulation pretreatment is performed on the bogie, so that a bogie rapid simulation preprocessing result is automatically generated, and then after the simulation report template submitted by the user is received, key information, related to the bogie rapid simulation preprocessing result, in the simulation report template can be obtained and used forbeing combined with the bogie rapid simulation preprocessing result to automatically generate a simulation report of a bogie.

The invention relates to a virtual maintainability simulation method based on depth perception gesture recognition. The method comprises the following steps: 1) building of a hardware environment; 2)data preparation; 3) realization of a functional layer; and 4) realization of an interactive layer. The method adopts non-wearable deep perception gesture recognition interaction equipment, so that auser can perform natural, visual and high-precision gesture interaction according with natural use habits of a human body, and the method can be used for more people without difference. In the aircraft design stage, maintainability simulation is conducted on all shipping spaces of an aircraft through the method, simulation operation can be directly conducted on a design digital model in a human-in-loop mode in the virtual reality environment, the maintainability simulation process is greatly simplified, and efficiency is improved; and by defining operation steps and operation gestures, the problems of high interaction randomness and low interaction precision of real-time maintainability simulation of the human in the loop are solved, and the practicability and accuracy of the real-time maintainability simulation of the human in the loop are improved.

The invention provides a system and a method for testing a bearer independent call control (BICC) service under an access network-free condition. The method comprises the following steps that: a calling audio/video session initiation protocol (SIP) terminal sends an SIP calling invitation message; an R4 simulation test platform converts the SIP calling invitation message into a BICC initial address message, sends the BICC initial address message to a tested BICC service system and establishes a 3G-224M media passage of the tested BICC service system for a calling user; the R4 simulation test platform continues establishing an RTP media passage of the calling audio/video SIP terminal; and the R4 simulation test platform bridges the established RTP media passage and the 3G-224M media passage. The system and the method belong to the field of network communication and can test various BICC service products under a TD or WCDMA network-free condition according to the simulation and media display of various calling/answering states by calling and called audio/video SIP terminals. Therefore, test cost is saved and high expandability is achieved.

The invention discloses a liquid-solid phase continuous form prediction method for a reflow soldering BGA group welding spot . Influence of coupling factors such as liquid-solid phase change of the welding spots, PCB thermal deformation and temperature field change of the welding spots on the forms of the BGA group welding spots is considered, so that the forms of the BGA group welding spots are accurately simulated and predicted, and the form prediction precision of the BGA group welding spots is improved. The reflow soldering BGA group solder joint liquid-solid phase continuous form prediction method is provided by taking the BGA group solder joint containing the PCB as an example, the method has the advantages of high simulation precision and simple simulation process, the simulation result is matched with empirical data, and the method has reasonability and effectiveness.

The embodiment of the invention provides a remote sensing imaging simulation method and a device, which relate to the technical field of computer simulation and are used for simulating the imaging result of a satellite optical sensor. The method includes: acquiring a first image; Determining a downsampling region in the first image according to downsampling parameters and imaging mode parameters of the optical sensor; Performing down-sampling processing on pixels in the down-sampling area to obtain a second image; The second image is adjusted according to the imaging mode parameters to obtaina remote sensing imaging simulation image based on the imaging mode parameters. The method can simplify the simulation process of satellite remote sensing imaging and reduce the cost and difficulty ofsatellite remote sensing imaging simulation.

The invention relates to a semiconductor structure and a preparation method of the semiconductor structure and belongs to the field of a semiconductor device. The semiconductor structure comprises a semiconductor substrate, an epitaxial layer, a first diffusion region, an oxidation layer, a polycrystalline silicon layer and an insulation layer, wherein the semiconductor substrate has the first semiconductor type, the epitaxial layer is covered on the surface of the semiconductor substrate, the first diffusion region is positioned in the epitaxial layer and has the second semiconductor type, the oxidation layer is arranged on the surface of the first diffusion surface, and in addition, the surface of the oxidation layer is basically aligned with the surface of the epitaxial layer, the polycrystalline silicon layer is positioned on the surface of the epitaxial layer and covers the partial oxidation layer surface, the partial epitaxial layer surface and the exposed first diffusion surface, and the insulation layer is positioned on the exposed oxidation layer surface, the exposed epitaxial surface and the polycrystalline silicon layer surface. Through the adoption of the RESURF technology, a low-doping first doping region is arranged in the semiconductor structure, and during the PN junction reverse deflection, the PN junction can realize the uniform load bearing through the RESURF technology. In addition, the thick oxidation layer can also be used for effectively improving the breakdown voltage of the PN junction. Meanwhile, the semiconductor structure provided by the invention has the advantages that the structure is simple, and the process is simple and convenient.

The invention discloses a method for arranging reinforcing ribs in a long-span tunnel lining model in a geomechanical model test. The method comprises the steps of calculating parameters of the reinforcing ribs in a secondary lining model, prefabricating a secondary lining model mold, pouring a concrete equivalent material in a pouring cavity and the like. According to the method for arranging thereinforcing ribs in the long-span tunnel lining model in the geomechanical model test, through a similar equivalent scaling design method, the parameters such as the reinforcing rib reinforcement ratio and the reinforcing rib section area matched with a secondary lining prototype are obtained through calculation according to a mechanical model, a prefabricating device of a tunnel secondary liningscaling model is developed, arrangement of the reinforcing ribs in the secondary lining model is achieved, the prepared model truly simulates a concrete material of a tunnel site, and the accuracy ofa mechanical test is ensured; and according to the scheme, the action mechanism of steel bars in the lining can be simply and efficiently simulated, an arranging device for the steel bar similar materials is manufactured through the method, and the device is accurate in steel bar positioning, easy to disassemble, low in manufacturing cost and capable of being widely applied to tunnel lining modeltests.

The invention discloses a crack simulation calibration device based on fracture mechanics and optical fiber sensing, and relates to the field of engineering structure health monitoring. The invention aims to solve the problem that the stress of a crack cannot be detected due to lack of a device for simulating the crack of an engineering material in the prior art. An upper test plate and a lower test plate are in lap joint in the vertical direction, the lap joint position is used for simulating a crack, a fixed support is fixed to one side face of the lower test plate, an R-direction sliding table is arranged on the fixed support, a Y-direction sliding table is arranged on the R-direction sliding table, a Z-direction sliding table is arranged on the Y-direction sliding table, and the Z-direction sliding table is fixedly connected with one side face of the upper test plate; an optical fiber sensor is used for sensing the strain or wavelength change caused by the gap generated by the upper test plate and the lower test plate; and optical fiber sensing equipment is used for receiving and displaying strain or wavelength of the optical fiber sensor, and is also used for establishing displacement generated by at least one of the Z-direction sliding table, the Y-direction sliding table and the R-direction sliding table and a strain or wavelength change relationship corresponding to the displacement. The device is used for crack simulation and calibration.

The invention discloses a heterogeneous network dynamic system level simulation method based on a physical layer abstraction algorithm. Aiming at the heterogeneous network fusion of an LTE (Long Term Evolution) honeycomb mobile communication network and the next generation high-speed wireless local area network based on a Wi-Fi wireless transmission standard protocol 802.11n, link simulation of a complex physical layer is simplified by using the physical layer abstraction algorithm and abstracted into a simple unitary parametric function, details of the physical layer protocol are shielded, and 802.11n and LTE different physical layers are abstracted into a uniform air interface model to be used as an across-layer module. The heterogeneous network dynamic system level simulation method based on the physical layer abstraction algorithm, provided by the invention, realizes dynamic system level simulation and greatly lowers operation complexity.