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231results about How to "Reduce modeling time" patented technology
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Physical three-dimensional model automatic modeling method
The present invention discloses a physical three-dimensional model automatic modeling method which comprises the following steps of (1) collecting a turntable point cloud and a modeling object point cloud, and carrying out real-time registration to obtain a mixed point cloud of an object and a turntable, (2) carrying out point cloud pretreatment to obtain the surface point cloud of a model object with a bottom surface point, (3) carrying out surface reconstruction to obtain the three-dimensional surface model of the object, (4) carrying out model simplification treatment on the three-dimensional surface model, and establishing the three-dimensional simplified surface model of the object, (5) carrying out texture mapping on the three-dimensional simplified surface model, and (6) carrying out model rendering on the three-dimensional model which is subjected to texture mapping to generate a two-dimensional image. The method has the advantages that the system operation is stable and reliable, the automation is realized in the operation process, a rebuilding effect is good, and the application needs of different simulation scenes can be satisfied by a built multi-granularity three-dimensional model.
Owner:BEIHANG UNIV
Urgent collection method based on credit score and urgent collection device thereof
InactiveCN106952155ABeneficial technical effectImprove the effect of collectionFinanceRisk levelData dredging
The invention discloses an urgent collection method based on the credit score and an urgent collection device thereof. The urgent collection method comprises the steps of collecting urgent collection object credit information, processing the collected credit information, establishing a credit risk scoring model, predicting the overdue debt collection probability and performing the targeted urgent collection strategy. The risk level can be automatically judged according to the urgent collection score result so that the urgent collection strategy of the client can be reasonably determined, the urgent collection effect can be enhanced and the bad debt loss can be reduced. Data mining acts as the analysis technology so that the modeling time can be saved and the data support can be provided for the urgent collection industry. Besides, user information can also be updated in real time, the urgent collection risk score can be more accurately predicted, the most appropriate urgent collection strategy can be performed and the urgent collection task efficiency can be enhanced.
Owner:深圳前海纵腾金融科技服务有限公司
Cultivation method of Cyp gene knocked-out rats, and preparation method of liver microsome of the rats
ActiveCN106148416ADiverse in vitro modelsImprove transfer abilityMicroinjection basedFermentationHepaticaMicro injection
The invention provides a cultivation method of Cyp gene knocked-out rats, and a preparation method of liver microsome of the rats. The Cyp gene knock-out herein includes Cyp single gene knock-out and Cyp multiple gene knock-out. In the method, firstly a Cyp gene knocked-out rat is constructed by means of a CRISPR / Cas system, which includes selection of a knocked-out target site, in-vitro synthesis and transcription of sg RNA and Cas9m RNA, preparation of a pseudopregnant female rat, in-vitro micro-injection and transplanting of a single-cell embryo, and cultivation of the rat, and finally, a homozygote Cyp gene knocked-out rat can be cultured. Furthermore, the liver of the Cyp gene knocked-out rat is extracted and is subjected to homogenization and differential centrifugation to prepare the liver microsome of the rat in Cyp gene deletion. The invention also provides an application of the Cyp gene knocked-out rats and the liver microsome thereof in study on drug metabolism.
Owner:EAST CHINA NORMAL UNIV
Bridge three-dimensional model construction method based on BIM
InactiveCN106934163ARealize parameterizationAchieve standardizationGeometric CADDesign optimisation/simulationComputer scienceTemplate library
The present invention discloses a bridge three-dimensional model construction method based on the BIM. The method comprises the following steps: dividing objects of an whole structure of the bridge, and classifying the objects of the bridge in a normative manner; subdividing the bridge components into elements and primitives, parameterizing the elements and primitives, and formulating a parameter table corresponding to the geometric dimensions; carrying out assembly and positioning on the three-dimensional model of the bridge components, determining and defining element control points and relative spatial position relationships, assembling the elements into components, storing the components into an component template library, and establishing component control points; extracting three-dimensional route information of the project, and determining stake marks and the design elevation of the route; and assembling the component three-dimensional model, based on the route information, using positioning parameters to determine the location of the component model, and calling the type method, so that parametric assembly can be automatically carried out between components. According to the method disclosed by the present invention, by optimizing the bridge model, parameterization and standardization of the bridge components are realized, the modeling time is shortened, and the design efficiency and quality are improved.
Owner:HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD
Three-dimensional modeling method and system
The invention provides a three-dimensional modeling method and a three-dimensional modeling system. The method comprises the following steps of: layering data according to resolution, and blocking the data of each layer; selecting data blocks to be displayed, and establishing block area models; and splicing all the block area models to form a complete three-dimensional model. In the method, the modeling data is layered and blocked, and the data blocks displayed on a back surface and outside a window can be discarded and only the data blocks to be displayed are modeled by the processing of multi-resolution pyramid establishment and blocking, thereby reducing a data volume in a modeling process, reducing the complexity of an algorithm and saving the modeling time.
Owner:CHINA DIGITAL VIDEO BEIJING
A method to generate a springback compensation surface based on mesh mapping of the edge lines or section lines of curved surfaces
InactiveCN101546349AReduce modeling timeShorten the development cycleSpecial data processing applicationsLine segmentMesh model
The present invention is a method to generate a springback compensation surface based on mesh mapping of the edge lines or section lines of curved surfaces. In this method, firstly, the edge lines of each surface in the geometric model of a part are selected and discretized into small segments. For larger surfaces, some section lines may be selected from the middle of the surfaces; secondly, after the position of the geometric model matches the position of mesh model, the points of intersection between the segments and the mesh will be found; thirdly, based on the one-to-one correspondence between springback compensation mesh and the pre-compensation mesh, the positions of the nodes on edge lines of the springback mesh are found; lastly, these nodes are fit into edge lines. Through these edge line segments, springback compensation surfaces can be established and the time for generation of springback compensation surface can be reduced.
Owner:HUNAN UNIV
Wind vibration simulation method of 220kV power transmission line tower line coupled system
InactiveCN105740549AFast form findingDisaster loss reductionData processing applicationsDesign optimisation/simulationElement modelSimulation
The invention discloses a wind vibration simulation method of a 220kV power transmission line tower line coupled system. The wind vibration simulation method comprises the following steps: 1: establishing a finite element model of the power transmission line tower line coupled system; 2: carrying out formfinding on the power transmission line tower line coupled system; 3: carrying out wind load calculation on the power transmission line tower line coupled system; 4: carrying out damping calculation on the power transmission line tower line coupled system; and 5: carrying out wind vibration response calculation and data extraction analysis. The wind vibration simulation method establishes a fine and accurate finite element model of the power transmission line tower line coupled system, and considers the influence of structural damping during wind vibration simulation calculation. The wind vibration simulation method is suitable for carrying out wind vibration analysis on a power transmission line of an area where wind damage frequently happens. On the basis, the power transmission line is subjected to local reinforcement and wind damage early warning to minimize the disaster loss.
Owner:XI AN JIAOTONG UNIV +2
Finite element passenger restraint system model based on modularized modeling and modeling method thereof
ActiveCN106294939AImprove optimization matching efficiencyReduce modeling timeDesign optimisation/simulationSpecial data processing applicationsSteering wheelModularity
The invention discloses a finite element passenger restraint system model based on modularized modeling. The finite element passenger restraint system model comprises a safety belt model, a safety air bag model, a seat model, an instrument board model, a steering wheel model, a finite element dummy model, a vehicle floor model and a windshield glass model. A modeling method comprises the following steps of (1) obtaining related property parameters of each component part; (2) benchmarking the property parameters of each restraint submodel; (3) respectively storing each restraint submodel and the finite element dummy model as independent modules; (4) rigidizing an edge mesh unit of each restraint submodel; (5) creating the contact between a dummy and each restraint submodel, and related control cards, so as to complete modeling; (6) properly adjusting the model established in step (5), simulating and analyzing. The finite element passenger restraint system model and the modeling method have the advantages that the modularized benchmarking and management on the restraint system simulation model can be realized, the submodels of the restraint system can be optimized and replaced, and the purpose of improving simulation accuracy and matching efficiency of the restraint system is realized.
Owner:重庆铁力士科技有限公司
Visual modeling editor for constructing system model
ActiveCN105302532AOperationalVersatilitySpecific program execution arrangementsSoftware systemSimulation
The invention discloses a system meta-model based visual modeling editor for constructing a system model. The editing of the system model and a system view is finished by taking a hierarchical model, an interface model, an algorithm model, a process model, a transmission model and a corresponding view as editing objects through a hierarchical editor, an interface editor, an algorithm editor, a process editor and a transmission editor. A visual system modeling tool with the advantages of computability, universality and usability is provided for various fields. The system model and the system view constructed by the editor are explicit in structure, adjustable in hierarchy and controllable in modeling granularity, and have computable full consistency. Methods are unified, so that top-down analysis design and bottom-up integration are convenient, and the editor is suitable for modeling various systems including software systems and information systems in various application environments. The modeling method is simple and complete in visual modeling, so that even personnel in general fields can independently and easily edit the system model and the system view.
Owner:CHENGDU PUZHONG SOFTWARE CO LTD
Modeling method for integrated broadband equivalent circuit model for tower valve layer of ultra-high-voltage direct current converter valve
ActiveCN106547990AAccurately reflect transient voltageReduce modeling timeSpecial data processing applicationsCAD numerical modellingTransient analysisUltra high voltage
The invention belongs to the electromagnetic transient analysis field in an electric power system, and particularly relates to a modeling method for a broadband equivalent model for performing analysis on a tower interlamination transient voltage of an ultra-high-voltage direct current converter valve. The modeling method specifically comprises the steps of taking a valve layer as a unit, and establishing a key component lumped parameter equivalent model in the valve layer and a valve layer terminal capacitor model; enabling the key component lumped parameter equivalent model in the valve layer and the valve layer terminal capacitor model to be connected according to an actual electrical connection condition of the valve tower to obtain the final the broadband equivalent model for performing transient voltage analysis on the tower interlamination of the ultra-high-voltage direct current converter valve. By considering the influence on the valve interlamination voltage distribution from the key component parameters in the valve and shielding cover stray capacitance parameters under a voltage effect, the integrated broadband equivalent circuit model is applicable to perform accurate and efficient analysis on the tower interlamination transient voltage of the ultra-high-voltage direct current converter valve under various kinds of voltages.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
Automobile suspension DMU (diesel multiple unit) model parameterization design method
ActiveCN104573162AReduce modeling timeQuick updateSpecial data processing applicationsEngineeringWorkload
The invention provides an automobile suspension DMU (diesel multiple unit) model parameterization design method. A hard point meter is used for driving point and line models of all components of a suspension, a point and line DMU model of the suspension is built by using the point and line models of the components, the point and line DMU model drives the suspension components to move, and a DMU model of a suspension system is formed. When the method provided by the invention is implemented, during the design change on hard points, the DMU model of the suspension system can be changed only through changing the hard point meter, during the design change on the component structure, new components are used for replacing the original components, the re-building of the DMU model is not needed, the response time on the DMU checking after the design change is obviously shortened, and the workload of engineers is reduced.
Owner:GUANGZHOU AUTOMOBILE GROUP CO LTD
Numerical simulation method of planar solid oxide fuel cells
InactiveCN106295082AReduce modeling timeCoupling method is simpleDesign optimisation/simulationSpecial data processing applicationsOxide3d image
The invention discloses a numerical simulation method of planar solid oxide fuel cells. The method includes the steps that 1, performance parameters of planar solid oxide fuel cells are globally defined; 2, 3D simulation models of planar solid oxide fuel cells are established according to geometric dimensions of cells inside a battery pack, physical fields are selected for the 3D simulation models as required, known parameters are input to the physical fields, and 3D simulation models with physical field parameters are obtained; 3, mesh generation is conducted on the 3D simulation models with the physical field parameters, stable-state solving is then conducted, stable-state operational data is obtained, post-processing is conducted on the stable-state operational data, and the required condition curves or 3D images are obtained. According to the method, parameterized structural design is conducted on SOFC, rapid modeling is achieved, and the efficiency of SOFC optimization design is improved.
Owner:HUAZHONG UNIV OF SCI & TECH
Public opinion event detection method, device and device
ActiveCN109299258ATimely PR handlingReduce modeling timeEnergy efficient computingText database clustering/classificationText categorizationData science
A method for detect public opinion event Installations and equipment, The methods include: On the basis of a large number of data training in the source domain, the text classification model that candetect public opinion in the corresponding domain is obtained by using a small amount of data from other domains to carry out re-migration training, and the basic model is used as the text classification model for public opinion detection in the source domain. Obtaining a text classification model of a target domain to which an event to be detected belongs from the obtained plurality of text classification models, The public opinion of the event to be detected is analyzed, and the probability value of the public opinion event belonging to the target domain is analyzed. According to the resultof the comparison between the probability value and the corresponding predetermined threshold, whether the event to be detected is the public opinion event of the target domain is judged, and then thepublic opinion event is processed in a timely manner. This scheme can not only reduce the modeling time, but also avoid the impact of low data volume in the corresponding domain on the model public opinion detection accuracy.
Owner:PING AN TECH (SHENZHEN) CO LTD
Short-term wind power prediction method and system based on deep learning network
ActiveCN112348292AImproving the accuracy of short-term power forecastingReduce modeling timeForecastingNeural architecturesAtmospheric sciencesWind power
The invention provides a short-term wind power prediction method and system based on a deep learning network. The short-term wind power prediction method comprises the steps of obtaining numerical weather forecast data of an area where to-be-predicted wind power is located; inputting the numerical weather forecast data into a pre-trained deep learning mapping model to obtain a predicted value of the wind power, wherein the deep learning mapping model comprises a corresponding relationship between the numerical weather forecast data and the wind power prediction value; and forming a grid by thenumerical weather forecast data according to positions, wherein each grid point in the grid comprises a plurality of weather parameters. According to the invention, the short-term power prediction precision of the wind power plant can be improved, meanwhile, the modeling time of the regional wind power prediction model can be shortened, and required computing resources and manpower resources arereduced.
Owner:CHINA ELECTRIC POWER RES INST
Coal slime flotation clean coal ash content prediction method based on deep learning
PendingCN111753912AReduce modeling timePrediction is accurateCharacter and pattern recognitionFlotationStochastic gradient descentData set
The invention discloses a coal slime flotation clean coal ash content prediction method based on deep learning. The method comprises the following steps: assembling an image acquisition hardware system; collecting a coal slime flotation froth image and corresponding ash content data; dividing the data set into nine types according to the + / -0.5 interval of the gray unit digit, and performing dataenhancement; adopting a resnet50 network to extract foam surface features, adopting a random gradient descent process to update parameters and softmax function classification, obtaining a high accuracy rate through multiple times of iterative training of a model, and finally making suggestions for on-site working conditions according to prediction results. Compared with manual subjective observation operation, the method has the following advantages: representative high-order abstract detail features can be automatically extracted along with continuous optimization of the model; and in addition, compared with a traditional method, the method has the following advantages: the modeling time is greatly shortened, high-order abstract features are extracted through a convolutional network, a training sample input into the model is more real, an obtained prediction result is more accurate, and the method has an important guiding effect on flotation field production.
Owner:CHINA UNIV OF MINING & TECH
A Visual Modeling Editor for Constructing System Models
ActiveCN105302532BComputableIntegrityIntelligent editorsSpecific program execution arrangementsSoftware systemSimulation
A visual modeling editor for constructing a system model on the basis of a system meta-model comprises a hierarchy editor, an interface editor, an algorithm editor, a flow editor and a transmission editor as components, and completes editing of the system model and system views by taking a hierarchy model, an interface model, an algorithm model, a flow model, a transmission model and corresponding views respectively as edited objects, thus a versatile and easy-to-use visual system modeling tool is provided for a wide variety of fields. The system model and system views are executable, clear in structure, adjustable in hierarchy and controllable in modeling granularity; the modeling method facilitates not only top-down analysis and design, but also bottom-up integration, and also is applicable to the modeling of various system software systems and information systems; the modeling method is simple and totally visual in modeling, and even a person skilled in the art can edit the system model and system views independently and easily.
Owner:CHENGDU PUZHONG SOFTWARE CO LTD
Aircraft safety warning system based on virtual technology
InactiveCN102254465AReal alarm statusEasy to operateCosmonautic condition simulationsSimulatorsFlight dynamicsMarine navigation
The invention discloses an aircraft safety warning system based on a virtual technology. The theory of airborne safety warning equipment is mainly used. Designs of a flight dynamics model and instrument control of a B737-NG aircraft are realized by using an ActiveX technology. A cabin of the system is designed by imitating a Boeing aircraft. An instrument can be enlarged and reduced. A steering wheel, a thrust rod and other operation equipment can be freely controlled. The system has the characteristics of really displaying a three-dimensional view and the geography. The system can not only realize the function of manually operating the aircraft to enter various types of alarm states, but also realize the functions of freely setting through a faculty machine so as to enable the aircraft to automatically enter various types of alarm states, and then enable the student machine to do the alarm clearing practice. The simulation of the virtual-real-time interactive aircraft cabin is realized. The imitation of human virtual complex control behaviours is realized. The system realizes the unification of the display of a virtual aircraft target queue on a virtual B737-800 navigation display instrument in the simulation of a TCAS (Traffic Collision Avoidance System) system and the display of the same in a vision system. The system disclosed by the invention has the advantages of being simple for operation, convenient for setting, real for alarm image and friendly in human-computer interface.
Owner:CIVIL AVIATION FLIGHT UNIV OF CHINA
Method for establishing human tumor xenotransplantation model cultured in vitro
ActiveCN109090039AOptimize inoculation conditionsReduce apoptosisAnimal husbandryHuman tumorApoptosis
The invention relates to the field of human xenotransplantation model research, in particular to a method for establishing a human tumor xenotransplantation model cultured in vitro. The establishing method includes the following steps: (1) collecting a tumor tissue sample; (2) placing a tumor tissue in a culture solution; (3) completing the preparation for low-temperature transportation and treatment; (4) cutting the tumor tissue into grain size in a sterile operating table; (5) cleaning the tumor tissue and then placing the tumor tissue in a hole plate 48 for culture; (6) detecting tissue apoptosis by in situ end labeling method; (7) selecting immunocompromised NCG mice to perform anesthesia and skin treatment; (8) implanting the cultured tumor tissue into the renal capsule of the mice; (9) completing modeling after 3 months. According to the invention, tumor tissue blocks are selected for modeling for the xenotransplantation model, which is beneficial to preserving the histopathological and genetic characteristics of primary tumors; and moreover, the obtained tumor tissue are cultured in vitro, which is beneficial to tumor typing and clinical practice; the addition of PD 98059 and artificial matrix glue can greatly reduce tissue apoptosis, which is beneficial to improving the success rate of transplantation.
Owner:广州长峰生物技术有限公司
Water conservancy and hydropower engineering BIM family library construction method
The invention provides a water conservancy and hydropower engineering BIM family library construction method, which takes Revit family library construction as guidance and combines the characteristicsof water conservancy and hydropower engineering, and comprises the following steps: step 1, carrying out entity splitting; 2, carrying out model file naming on each split independent part; 3, defining a family category, and before selecting a family sample plate, determining whether the family category belongs to electrical equipment, pipe fittings or mechanical equipment; step 4, manufacturing family parts; step 5, carrying out plane expression setting, which comprises view setting, plane expression, material setting and electromechanical connecting part setting; 6, a family library is established, after family components are manufactured, the quality of the manufactured family components can be distinguished through availability testing and debugging, and finally the debugged family components are classified into the family library; and step 7, applying the family library to the construction technical case, testing compatibility and reusability, debugging according to the satisfaction condition, and finally classifying the debugged family components into the family library.
Owner:娄鹏
A multi-classifier fusion method based on PCA dimension reduction
ActiveCN109447099AReduce modeling timeExperimental effect is goodCharacter and pattern recognitionForward selectionClassifier fusion
The invention discloses a multi-classifier fusion method based on PCA dimension reduction. A feature selection method is applied to the data feature set, involving (step-forward selection method and)a principal component analysis method, and the method constructs a few new features to replace the original features to model, and the stacking algorithm is also applied to the multi-classifier to obtain the optimal classification effect at present in the identity authentication experiment of the user mouse behavior. The multi-classifier fusion method solves the problem that the dimension of the characteristic space of the user mouse behavior is too much when the identity authentication based on the user mouse behavior exists in the prior art.
Owner:XIAN UNIV OF TECH
Visual software modeling method for constructing software view on basis of software meta view
ActiveCN105320504AComputableClear structureGeometric CADVisual/graphical programmingGranularityUsability
Owner:CHENGDU PUZHONG SOFTWARE CO LTD
Fault diagnosis method for rotor system based on principal component analysis and broad learning
ActiveCN110243590AReduce complexityReduce modeling timeMachine gearing/transmission testingCharacter and pattern recognitionKernel principal component analysisLinear correlation
The invention discloses a fault diagnosis method for a rotor system based on principal component analysis and broad learning. Principal component analysis is used for carrying out dimension reduction on a feature matrix formed after feature extraction, the linear correlation between the data is reduced, redundant attributes are eliminated, and a low-dimensional matrix capable of retaining the essential features is obtained; and then the matrix is input into a broad learning system for fault identification, and the fault classification task of the rotor system is completed. According to the method in the invention, the principal component analysis and the broad learning system are introduced into the fault diagnosis and identification of the rotor system, through the method, the fault classification complexity can be effectively reduced, the data modeling time can be greatly shortened, the fault identification efficiency of the rotor system can be improved, therefore, the fault diagnosis task of the rotor system can be efficiently completed, the practicability is good, and the method is worthy of popularization.
Owner:CIVIL AVIATION UNIV OF CHINA
Common software modeling method for building software model based on software meta-model
ActiveCN105278936AComputableClear structureSoftware designVisual/graphical programmingTop down analysisSoftware system
Owner:CHENGDU PUZHONG SOFTWARE CO LTD
3D scanning technology and MR technology-based building structure demolition method
ActiveCN107391793AReasonable stepsHigh precisionGeometric CADDesign optimisation/simulationMixed realityData information
The invention discloses a 3D scanning technology and MR technology-based building structure demolition method. The method comprises the steps of setting scanning points according to features of an existing building structure, scanning a building by using a three-dimensional laser scanner, splicing data information of different scanning points, rubbing a building structure model, and reversely building a BIM of members; performing format conversion on the model and importing the model into 3D 3S stress analysis software for performing stress analysis to form an internal force envelope diagram and a combined displacement diagram corresponding to the building structure; integrating the internal force envelope diagram and the combined displacement diagram, and forming a building structure demolition scheme in the BIM; and by utilizing an MR technology, superposing the building structure demolition scheme formed in the BIM to a building entity for performing simulation. According to the 3D scanning technology and MR technology-based building structure demolition method provided by the invention, the steps are reasonable; through simulative analysis, the demolition scheme is optimized; by utilizing visual disclosure of the MR technology, the construction safety is ensured, the construction cycle is controlled, and the construction cost is reduced.
Owner:CHINA CONSTR FIRST BUILDING GRP CORP LTD +1
Layered multi-domain visible security operation and maintenance method based on graph database
ActiveCN107579855ASolve the problem of difficult security operation and maintenanceImprove agilityData switching networksSpecial data processing applicationsInformation layerStructural relation
The invention discloses a layered multi-domain visible security operation and maintenance method based on a graph database. The method comprises the steps of firstly dividing security operation and maintenance into a basic security layer, a security analysis layer and a threat information layer; meanwhile, dividing the function of each layer into a single or multiple domains, wherein the basic security layer is divided into a network topology domain, a system service domain, a personal information domain and a security strategy domain, the security analysis layer is divided into a dependence domain, a network security domain and a user security domain, and the threat information layer is composed of a corresponding threat information standard domain; then converting structural relation andattribute features of each domain to a corresponding UML graph, and meanwhile deploying sensors with corresponding functions at specified network positions for collecting data needed by each domain;then mapping the UML graph to the graph database via a corresponding API; and at last, achieving visible security operation and maintenance through querying and analyzing data of the graph database. According to the method provided by the invention, a graph database technology is combined with security operation and maintenance, so that difficulty of security operation and maintenance is reduced,and analysis efficiency of security operation and maintenance is improved.
Owner:GUILIN UNIV OF ELECTRONIC TECH
BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction
ActiveCN107974945AImprove efficiency and accuracyReduce modeling time and difficultyBridge erection/assemblyRigid frameContinuous beam
The invention relates to a BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction. The BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction comprises the steps of A, extracting the related property value of a main beam; B, extracting the corresponding coordinate value of the mileage pile number of each node according to road center line; C, establishing a file of main beam segmental node information according to the values obtained in the step A and B; D, establishing a main beam parametric family file according to the shape and design parameters of the cross section of the main beam; E, integrating an BIM model of a variable cross-section continuous beam, whichsatisfies cantilever casting construction segment, in a software according to the file of main beam segmental node information, which is established in the step C, and the main beam parametric familyfile, which is established in the step D. The BIM modeling method based on variable cross-section rigid frame bridge continuous beam cantilever casting construction has the advantages that the BIM model of the variable cross-section continuous beam, which satisfies cantilever casting construction segment, is automatically established by inputting parameters; the reverse modeling efficiency and accuracy are greatly enhanced; and the method can be used again in the follow-up similar projects so that the modeling time and difficulty are greatly reduced.
Owner:CHINA 19TH METALLURGICAL CORP
Method and apparatus for calculating rotational inertia of multi-body dynamic model and vehicle body model
ActiveCN106446370ACalculation of moment of inertia is fastImprove accuracyGeometric CADDesign optimisation/simulationDynamic modelsMoment of inertia
The invention discloses a method and an apparatus for calculating rotational inertia of a multi-body dynamic model and a vehicle body model. The method comprises the following steps of obtaining a tire stress state of a vehicle in a static condition to serve as a wheel load of each wheel of the vehicle; obtaining basic parameters of the vehicle; calculating a centroid position of a multi-body complete vehicle model of the vehicle according to the wheel load of each wheel of the vehicle, and calculating complete vehicle rotational inertia of the vehicle according to the basic parameters of the vehicle; and calculating the rotational inertia of the vehicle body model of the vehicle according to the centroid position of the multi-body complete vehicle model of the vehicle and the complete vehicle rotational inertia. According to the method, the rotational inertia of the vehicle body model of the vehicle can be quickly calculated, so that the modeling duration is shortened and the accuracy of the vehicle body model is improved.
Owner:BAIC MOTOR CORP LTD
Method for establishing transistor noise model capable of scaling along with offset
InactiveCN107609269AHigh precisionSimple resultSpecial data processing applicationsSmall-signal modelEngineering
The invention relates to the technical field of semiconductor integrated circuit manufacture, and discloses a method for establishing a transistor noise model capable of scaling along with offset. Themethod comprises the following steps that: measuring the direct current IV features of a transistor, selecting a direct current IV model, and using the direct current IV model to fit tested direct-current IV data to obtain an accurate direct-current IV model; on the basis of the accurate direct-current IV model, calculating the small signal model parameter of the transistor to obtain the small signal model of the transistor; on the basis of the accurate direct current IV model, obtaining the noise current sources of the drain electrode and the grid electrode of the transistor, and correlationthereof; and importing the drain electrode noise current source and the grid electrode noise current source of the transistor and the correlation thereof into the small signal model of the transistor, and calculating four noise parameters of the transistor. Therefore, a modeling process is greatly simplified, modeling time is greatly shortened, the method is simple and efficient, is high in accuracy and is easy in expansion.
Owner:CHENGDU HIWAFER SEMICON CO LTD
Scorecard modeling method and apparatus, computer device and storage medium
The embodiment of the application discloses a scorecard modeling method and device, a computer device and a storage medium. The method comprises the following steps: obtaining customer data; Countingmissing values corresponding to each of the variable data, and processing the variable data according to preset processing rules corresponding to the missing values to obtain sample data; Extracting afeature vector matrix corresponding to a preset number of principal components according to the sample data based on a preset principal component extraction rule; Based on a logistic regression model, performing modeling training according to the feature vector matrix to complete modeling of the scorecard. By extracting principal components instead of manual grouping which is the most time-consuming in the traditional modeling process, the method optimizes the modeling flow, greatly shortens the modeling time and improves the modeling efficiency.
Owner:深圳市牛鼎丰科技有限公司
,Method of importing CAD data based on GIS into SWMM
ActiveCN108959598AReduce human measurement errorShorten the timeSpecial data processing applicationsICT adaptationWater storageData ingestion
The invention relates to the technical field of rainwater drainage, in particular to a method of importing CAD data based on GIS into SWMM. The method includes the following steps: step 1, pre-processing CAD data, deleting and classifying the data before importing so as to be used by GIS; step 2, conducting data verification to verify whet that topological relationship between the node and the pipeline is correct; step 3, conducting GIS data extraction and calculation: including node data extraction, pipeline data extraction, catchment data extraction; step 4, importing that data into the SWMMmodel; step 5, carrying out result and parameter analysis: testing and simulating the imported model. The method has the beneficial effects of saving the SWMM modeling time of the CAD and GIS data sources, improving the model data precision, reducing the human error, realizing the lossless conversion and realizing the parameter determination of the node bottom hole elevation, the characteristic width of the catchment area, the average slope, the water storage quantity of the depression, the impermeability percentage and the like.
Owner:SHENYANG JIANZHU UNIVERSITY
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