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910 results about "Computational analysis" patented technology

Method for real-time visualization of BGP analysis and trouble-shooting

The present invention comprises a multi-tier system. Major goals of the system are to 1) clearly visualize BGP dynamics and alert/report important deviation of BGP dynamics to avoid overwhelming the operators with too much information and 2) analyze the root cause of the problems by using a multi-tier approach, with a light-computational analysis and high-level classification for a real-time problem identification followed by a more rigorous off-line analysis for a further and more detailed trouble shooting. An example embodiment is provided that comprises four modules. The first module comprises a distributed family of collectors in charge of collecting real-time network information. The second module filters out non-relevant prefixes and extracts and profiles key features of the network information. The third module monitors BGP activity from both an Internet-AS and single-AS perspectives by displaying the data in real time and highlighting major shifts or divergence from historical baselines with comprehensive layouts. The forth module is run off-line to focus on a few relevant events that are selected through the first three modules. This is usually a time-consuming phase of the process due to the different temporal and/or spatial correlation that must be run across several sets of data. During this phase, the system can spend more time to better identify the real cause of the problem.
Owner:THE BOEING CO

Line loss lean comprehensive management system and method

The invention relates to a line loss lean comprehensive management system and a line loss lean comprehensive management method. Relevant line loss data dispersed at automation systems are integrated so as to establish a uniform line loss databank and eliminate line loss information isolated island. The data is read on line so as to calculate the line loss, and the conventional line loss calculation is changed into on-line statistics and calculation from afterwards statistics and calculation, so that the real-time property in line loss analysis is enhanced. The line loss situation of an electric power bureau is calculated in the overall angle, the calculation and analysis on the line loss cover all voltage grades of a power grid, and the comprehensiveness and the completeness in line loss calculation and analysis are ensured. By adopting the on-line calculation mode, the situation that in the past the calculation and analysis can only be carried out on typical days is changed, the line loss analysis does not change along with the change of the season and the external environment any longer, the calculation result is more accurate and real, the situation that in the past only the line loss result is singly and roughly analyzed is changed, the working cost is lowered, and the working efficiency is improved.
Owner:STATE GRID SHANDONG ELECTRIC POWER

Transmission line malfunction visualized report method and system based on Web and GIS

The invention discloses a transmission line malfunction visualized report method and system based on a Web and a GIS. The system comprises a web server side (1), a switch (2) and a client side (3). The web server side (1) is used for acquiring transmission line malfunction information, locating a malfunction to a specific tower, and providing Web services by combining a satellite map. The switch (2) is used for enabling the web server side (1) and the client side (3) to be connected. The client side (3) is used for visualized displaying of the transmission line malfunction. After electric transmission lines of a power grid break down, the system is triggered to work, the Web service side locates the malfunction tower position and generates an XML file after malfunction information computational analysis, and provides Web services to the client side (3) to carry out visualized displaying of the malfunction information. According to the transmission line malfunction visualized report method and system based on the Web and the GIS, the transmission line malfunction information is displayed visually in real time, the visual cognition degree of power transmission network malfunctions is improved, the capacities that power enterprise personnel display important information in a large amount of power system data and monitor the states of the power grid can be improved, and the reliability of the system is guaranteed.
Owner:STATE GRID CORP OF CHINA +1

Large steam turbine-generator set rotor crack fault real-time diagnosis method

The invention discloses a large steam turbine-generator set rotor crack fault real-time diagnosis method belonging to the filed of mechanical vibration state monitoring and fault diagnosis. Necessary computational analysis and judgment for vibration data are carried out by collecting the vibration signal of a rotor shaft of a steam turbine. The shaft vibration base frequency vibration amplitude and double frequency vibration amplitude at both sides of the rotor are computed in real time and the shaft vibration base frequency vibration amplitude is validated in real time so that the shaft vibration base frequency vibration amplitude at any side of the rotor is judged whether to be larger than vibration amplitude threshold value. Combined with least square method and product-moment correlation coefficient calculating method, real-time quantitative computational analysis, such as incremental validation of the shaft vibration base frequency vibration amplitude and incremental validation of double frequency vibration amplitude of shaft vibration, is carried out on the vibration data of shaft vibration base frequency. Based on the quantitative computational analysis and combined with each verification result, on-line diagnosis of the generator set whether to have rotor crack fault is automatically carried out in real time. The method has the advantages of scientific method and reliable conclusion, and on-line monitoring and fault diagnosis can be automatically realized in real time.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)

True stress-true strain computation model and test system

InactiveCN101319977AAccurate performance characteristics of mechanical behaviorExpress mechanical behavior characteristicsSpecial data processing applicationsStrength propertiesVisual technologySoftware system
The invention researches the substantive characteristics of material deformation to aim at the practical problem of measuring real stress-real strain and discloses a real stress-real strain calculating model and a practical testing system: 1, based on the analysis on the deformation of a tension specimen, taking a unit body the special part of which is provided with characteristics as the object for the stress-strain analysis, building a unique full-deformation unit model, firstly solving the theory analysis problem of real stress-real strain, establishing a theory foundation and building a novel real stress-real strain calculating formula: Sigma i is equal to 4Fi/Pi d<2>I and Epsilon is equal to (d<2>0/d<2>i) minus 1; 2, adopting a machine visual technology and an image processing method to develop a practical software system and a practical hardware system that are compatible with the machine visual technology and the image processing method, and realizing the direct non-contact real stress-real strain measuring in real meaning; 3, the testing system includes a light source (1), CCD camera (2), an image acquisition card (3), a data acquisition card (4) and a material testing machine (5); 4,the software includes image capturing program, load data acquisition program and comprehensive calculation analysis program.
Owner:HARBIN INST OF TECH

Method for splicing and integrating models in real-time simulation system of large power system

The invention belongs to the field of simulation and computational analysis on power systems, particularly relating to a method for splicing and integrating models in a real-time simulation system of a large power system. The method is characterized in that the online calculating data of an intranet is reserved completely, an extranet is supplemented with offline data, and through integrating an offline model (which is not consistent in time and space) with online data, integrated data which is complete in modeling and consistent with the actual conditions of the power system can be provided in seconds or minutes. The method comprises the following steps: firstly, splicing and checking the online data, and carrying out grandstream verification on the online data so as to judge whether the online data is available; then, on the basis of intelligently setting up an online/offline data mapping table, supplementing the equivalent part of the extranet in the online data with the corresponding offline data; and finally, after adjusting the boundary connection and boundary grandstream, carrying out topology analysis and grandstream calculation on the whole network, thereby obtaining a model which can be used for the calculation of a large real-time simulation system.
Owner:CHINA ELECTRIC POWER RES INST +2

Design method of seamless turnouts on elevated station of longitudinally, transversely and vertically coupled high-speed railway

ActiveCN101699449ADetailed structural designDetailed designSpecial data processing applicationsCouplingEngineering
The invention discloses a design method of seamless turnouts on an elevated station of a longitudinally, transversely and vertically coupled high-speed railway, belonging to the fields of railway engineering technology application and design. The design method comprises the following steps: by considering the factors of the structure of a bridge, the arrangement mode of supporting seats and the structure types of rails and considering the actual conditions of displacement coupling among towing points and the influence of the longitudinal displacement of steel rails on the transverse deformation of tongue rails, making a basic assumption; using three-dimensional beam elements to simulate the steel rails; establishing non-uniform beam elements according to the actual cross sections for tongue rails and point rails; modeling according to the actual cross section attributes for steel rails; and using a finite element method to complete corresponding computational analysis according to different working conditions of the seamless turnouts on the bridge. The invention really reflects the mutual coupling action of the bridge, the rails and the turnouts, obtains more accurate results, meets the actual conditions, has high efficiency and strong flexibility, is suitable for design and computational check of various seamless turnouts or turnout groups on the bridge, and provides a reliable tool for the design of the seamless turnouts on the bridge.
Owner:北京协同创新轨道交通研究院有限公司

System and method for structural analysis of indirect dry cooling tower

The invention relates to a power station indirect dry cooling system, and provides a system and a method for structural analysis of an indirect dry cooling tower based on APDL (ANSYS Parametric Design Language). The method comprises the following steps of: 1) according to geometric outside dimension of the indirect cooling tower, defining geometric parameters of the indirect cooling tower, and establishing a parameterized geometric model of the indirect cooling tower; 2) defining the unit type, real constants and material constants of the indirect cooling tower; 3) defining unit meshing size, performing self-adapting meshing division, and establishing a finite element model of the indirect cooling tower; 4) respectively applying parameterized loading for the indirect cooling tower under five loading working conditions (dead load, live load, wind load, temperature load and earthquake load) and performing computational analysis; and 5) performing combination of loading working conditions, and extracting computed results. Through the application of the system, the full process control of the indirect cooling tower from modeling to calculation can be realized. Meanwhile, the indirect cooling tower can be optimally designed by adjusting the value of each parameter. A large amount of repeated work is avoided, and the efficiency of structural analysis and design can be greatly improved.
Owner:DATANG BEIJING ENERGY MANAGEMENT

System and method for monitoring safety of dangerous chemical transport in real time

The invention discloses a system and a method for monitoring the safety of dangerous chemical transport in real time. The system comprises a sensor system, an intelligent vehicular terminal and a dangerous chemical transport monitoring center. The sensor system is connected with the intelligent vehicular terminal, and the intelligent vehicular terminal is connected with the dangerous chemical transport monitoring center. The method includes that the intelligent vehicular terminal receives state data transmitted from the sensor system and displays the various state data of dangerous chemicals in real time, so that a driver can check the state data; a data computational analysis expert system of the dangerous chemical transport monitoring center analyzes and judges state information and outwardly transmits alarm signals if abnormal conditions occur, so that the driver can be timely reminded of handling the abnormal conditions. The system and the method have the advantages that information the dangerous chemicals, a transport vehicle for the dangerous chemicals and the driver can be monitored in real time, over-speed driving and drunk driving are particularly prevented, accidents due to drunk driving and over-speed driving of the driver and the abnormal conditions of the dangerous chemicals in dangerous chemical transport procedures can be timely and effectively prevented, and the safety of dangerous chemical transport can be improved.
Owner:ZHANGJIAGANG MEIHE ELECTRONICS TECH

Method for achieving power grid light storage system capacity configuration and optimization distribution

The invention discloses a method for achieving power grid light storage system capacity configuration and optimization distribution. The method for achieving the power grid light storage system capacity configuration and the optimization distribution includes the following steps: (1) a photovoltaic electricity generation grid-connected system model is established; (2) the model is conducted with load flow calculation, and whether power grid operation meets constraint conditions is judged; if the power grid operation meets the constraint conditions, a next step is conducted; and if the power grid operation does not meet the constraint conditions, the step (1) is returned to, and a power grid parameter is modified; (3) initial emulating calculation is conducted to obtain an index value before energy storage system access; (4) N access points of an energy storage system are conducted with emulating calculation, so that an index value after the access is obtained; (5) an index of each access point is conducted with normalization processing, so that an objective subfunction is generated; (6) N objective functions with variable balance coefficients are obtained through the generated objective subfunction; (7) an assessment result is obtained through objective function computational analysis; and (8) the assessment result is conducted with optimal value choices. According to the method for achieving the power grid light storage system capacity configuration and the optimization distribution, a power grid is provided with fast active and reactive power support. The power grid voltage stability level is improved, and the network loss is lowered. Besides, the accuracy and the generality are improved.
Owner:STATE GRID CORP OF CHINA +2
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