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320 results about "Static model" patented technology

Static model. The static model describes the structure of a distributed parameter system, i.e. its state at a specific time instant. The description of qualitative states in a distributed parameter model is more complex than in a lumped parameter model, regardless of whether an object-based or a field-based ontology is used.

System for monitoring secondary circuit model on line in real time based on protection device

The invention belongs to the technical field of power systems and discloses a system for monitoring a secondary circuit model on line in real time based on a protection device. The system comprises a network communication module, a model resolution module, a graph generation module, a model storage module and a real-time comparison module, wherein the model resolution model is connected with the graph generation module and the model storage module and outputs a substation configuration description (SCD) static model and a resolved configured IED description (CID) on-line model respectively; the real-time comparison module is connected with the network communication module and the model storage module, receives a generic object oriented substation event (GOOSE) real-time model, a verified SCD static model and a resolved CID on-line model, compares and outputs a comparison result to the network communication module, and the comparison result is uploaded to a background system to realize real-time on-line monitoring. By the system, a phenomenon that a virtual terminal and a secondary circuit of the protection device make mistakes due to SCD file modification, CID configuration errors, secondary circuit real-time connection obstacles corresponding to GOOSE messages and the like can be timely found, so that operational risks of a substation are reduced.
Owner:福建永福数字能源技术有限公司

Secondary circuit closed loop monitoring system based on GOOSE input end mapping mechanism

InactiveCN103618384ARealize secondary circuit closed-loop monitoringCircuit arrangementsVirtual terminalElectric power system
The invention provides a secondary circuit closed loop monitoring system based on a GOOSE input end mapping mechanism in the technical field of power systems. The secondary circuit closed loop monitoring system comprises a network communication module, a model analyzing module, a pattern generating module, a real-time comparing module and a data storage module. The model analyzing module analyzes SCD files from the network communication module, outputs an obtained static model of an IED device virtual terminal/virtual circuit to the pattern generating module, maps a GOOSE message feature value and a GOOSE input terminal to mapping definitions of a corresponding MMS model object, and outputs the mapping definitions to the real-time comparing module. According to an IED device standard drawing template prestored in the data storage module and the static model of an IED device virtual terminal/virtual circuit in the model analyzing module, by means of a template matching technology, the pattern generating module carries out matching on the IED device standard drawing template to generate an IED device secondary circuit diagram, and output the IED device secondary circuit diagram to the data storage module for visual display. According to the system, abnormal conditions of a secondary circuit and abnormal situations of a GOOSE control block, a dataset, goIDs and other key content can be found timely according to abnormality of a GOOSE message. Secondary circuit closed loop monitoring based on the GOOSE input end mapping mechanism is achieved, and reliable technical guarantee is provided for safe operation of an intelligent substation.
Owner:SHANGHAI YIHAO AUTOMATION CO LTD

Method for designing jointless track of long and large bridge girder longitudinal butt plate type ballastless track for high-speed railway

InactiveCN102789531AFully consider longitudinal resistanceFully consider lateral stiffnessRailway tracksBridge structural detailsEngineeringSlurry
The invention relates to a method for designing a jointless track of a long and large bridge girder longitudinal butt plate type ballastless track for a high-speed railway. According to the method provided by the invention, ANSYS software is utilized to establish a latitude vertical space coupling statics model of the jointless track of the long and large bridge girder longitudinal butt plate type ballastless track for the high-speed railway, and ABAQUS software is utilized to establish a space coupling kinetic model. According to the method, the compositions of systems such as a steel rail, a fastener, track plates, a slurry placement layer, bed plates, a sliding layer, a consolidation mechanism, high-strength extruded sheets and L-shaped side check blocks, and structures such as supporting layers on a subgrade soil body and a road foundation and the action of high-speed vehicles are taken into full consideration, and friction factors of sliding layers on different bridge or friction plates, the longitudinal resistance of the fastener, the temperature difference of the bridge girder, the temperature difference of a ballastless track structure, the elastic modulus of the slurry placement layer and the like are calculated, so that the stress and deformation of the track and the bridge girder are obtained. The method provided by the invention is suitable for the design and computational check of the jointless track of the long and large bridge girder longitudinal butt plate type ballastless track for the high-speed railway, and providing service for the design calculation as well as conservation and maintenance of the high-speed railway.
Owner:BEIJING JIAOTONG UNIV

A simulation system and method for a paas cloud platform

The invention discloses an emulation system for a PaaS (Platform-as-a-service) cloud platform. A static model comprises a node model, a topology model, a link model, an application model and a user model, wherein the node model is used for determining computing resources, communication resources and application deployment conditions; the topology module is used for determining role definition of each node and topology connecting conditions; the link model is used for determining communication link attribute of the node; the application model is used for determining computing resource spending, communication resource spending and time delay for application logic and application processing; the user model is used for determining user requirement distribution and user requirement achieving conditions; the dynamic model comprises a control model, a protocol model and an event model, wherein the control model is used for determining operation logic and layout relationship of application and node as well as selecting a mode of processing nodes for business request after reaching the business request; the protocol model is used for determining an interacting framework of the PaaS cloud platform; and the event model is used for determining dynamic events with uncertainty generated in a PaaS cloud platform operating process. The invention discloses an emulation method based on the system. According to the emulation system for the PaaS cloud platform and the emulation method for the PaaS cloud platform disclosed by the invention, emulation load conditions of the node in the PaaS cloud platform can be determined.
Owner:BEIJING UNIV OF POSTS & TELECOMM

Calculation method for driving axle gear dynamic characteristics considering main speed reducer housing

The invention relates to a calculation method for driving axle gear dynamic characteristics considering a main speed reducer housing. The calculation method comprises the steps of (1) defining an overall coordinate system, (2) building an axis finite element model, (3) building a nonlinear bearing model, (4) building a gear mechanical model, (5) building a dimension reduction finite element model of the main speed reducer housing, (6) building a static model of a driving axle main speed reducer gear transmission system, (7) calculating bearing stiffness formed during static balance, (8) building a dynamic model of the driving axle main speed reducer gear transmission system, (9) calculating natural vibration characteristics of the driving axle main speed reducer gear transmission system, and (10) calculating the driving axle main speed reducer gear dynamic characteristics. According to the calculation method for the driving axle gear dynamic characteristics considering the main speed reducer housing, the gear transmission system dynamic model comprising the main speed reducer housing is built through a finite element method and a modal comprehensive method, the mutual effect of the main speed reducer housing and the transmission system is considered, the driving axle gear dynamic characteristics considering the effect of the main speed reducer housing can be accurately and efficiently calculated, and the calculation method can be widely applied to calculation and analysis of the dynamic characteristics of various gear transmission structures comprising housing bodies.
Owner:TSINGHUA UNIV +1

A method and device for generating a depth map for stereoscopic planar video

The invention discloses a depth map generation method for plane video three-dimensional conversion, comprising the following steps of: segmenting a current frame image based on scene static model distribution to obtain segmented regions, marking pixels and clustering the pixels to different regions to generate a static model depth map of the current frame image; selecting characteristic points ofthe current frame image and a reference frame image, calculating a motion vector of a moving object, and performing motion analysis on the motion vector to obtain motion analysis result of the current frame image and the reference frame image; generating a dynamic model depth map of the current frame image according to the segmented regions of the current frame image and the motion analysis result of the current frame image and the reference frame image; and adaptively fusing the static model depth map and the dynamic model depth map of the current frame image. The invention further disclosesa depth map generation device for plane video three-dimensional conversion. With the method and the device, a static model and a dynamic model of a scene are fused, a stereoscopic video with more vivid effect can be obtained, and better stereoscopic effect can be achieved.
Owner:TSINGHUA UNIV

Method and device for generating dynamic alarm threshold value of parameters of refining process

The invention provides a method and a device for generating a dynamic alarm threshold value of parameters of a refining process, and relates to the technical field of petroleum refining fault monitoring. The method comprises the following steps of obtaining historic data of the parameters of a refining process production device; determining initial historic training data of the parameters according to the length of a sliding window and the step length, and updating historic training data for once every other step length time from the initial historic training data; forming normalized historic training data; carrying out kernel density estimation on each parameter, and generating a probability density function of the parameters; determining a probability distribution function of each parameter; determining an alarm threshold value corresponding to each parameter according to the probability distribution function of each parameter and a preset alarm threshold confidence degree. According to the method for generating the dynamic alarm threshold value of the parameters of the refining process, provided by the invention, the dynamic alarm threshold value of the parameters can be obtained, and the problems that because a static model parameter threshold value method is adopted at present, and the alarm threshold value of the parameters is artificially regulated, false alarm or leakage alarm can be easily caused, and the sensitivity of abnormal monitoring can be easily reduced can be solved.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
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