共查询到20条相似文献，搜索用时 390 毫秒
1.
The interconnection network used in a multiprocessor system provides an effective mechanism for the data exchange between the processors and is one of the dominating factors of performance of the system. The fault tolerance of an interconnection network can be measured by the probability that the network keeps functional in the presence of failures. The authors examine the fault tolerance of four regular interconnection networks (i.e. hypercube, crossed cube, Moius cube, and locally twisted cube) with the probabilistic approach. Experimental results show that all these interconnection networks display excellent fault tolerance. Moreover, the crossed cube enjoys the highest probabilistic of connectivity among them. 相似文献
2.
A new principle and scheme of a Feeder Automation based system protection using the channel of communication is proposed. The conjoint protection devices exchanging fault signal with direction information and the fault can be cleared instantly. These information can hel Pto isolate the fault zone and restructure the network rapidly. The recover is used for instantaneous faults. The optical MODEM disjoins the SCADA communication and Boolean signals functions using coding technology. So the fault flags can be exchanged rapidly peer-to-peer and special optical cables are not needed. Frames between optical MODEM are sent automatically. This scheme presented is successful through physical simulation experiment and has operated for about two years in a real distribution network. 相似文献
3.
A type of handhold computer that has been researched successfully is introduced as the application case and practical usage effect about fault tolerance technology in the machine. At the meantime, it can be as a usage for reference while the same type of machine brings in fault tolerance technology in order to increase its reliability. So, it has greater availability and extended character. 相似文献
4.
Some results are presen ted which related fault-tolerance degrees of a multibussystem with the con nectivity of the bipartite graph induced by the system. Using the best con nectivi-ty bipartitegraph. we also present two classes of multibus systems which have the best degree of busfault tolerance and the best degree of bus-processor fault toferance as well as better degree of proces-sor fault tolerance. 相似文献
5.
A novel method for power transmission line monitoring and fault diagnosis is proposed based on non linear frequency response analysis. The power line carrier signal has been used for on line monitoring of power transmission line. As the non linear frequency response function describes the system inherent characterization, different frequency response patterns corresponding to different operation states of transmission line can be established. Based on the analysis of transmission line characteristics of fault modes, various fault features can be extracted, thereby achieve online monitoring and fault diagnosis on transmission line. Simulation experiments show the effectiveness of the proposed method. 相似文献
6.
This paper centers on the study of intelligentized fault lineselection when the small current grounding electric system is grounded in single-phase. Based on the known theories and methods of groundingline-selection, we propose a comprehensive neural-based intelligentized processing plan, which offers a new approach to improving accuracy rate of fault line selection andevaluating various arithmeticfor grounding protection in practice. 相似文献
7.
Aiming at insufficiency exists in the process of machinery fault diagnosis at present, the paper takes consider of the application of information fusion technology in fault diagnosis to make fault diagnosis effectively. The applications of information fusion methods based on neural network, the Bayesian theory and the D-S theory are discussed in detail. Example is also given to explain the validity of information fusion technology in diagnosis analysis. 相似文献
8.
Under the pointview of epistemology and generalized information theory, fault diagnosis can be regarded as the state identification process by dint of various cognitive tools. Therefore, information Entropy can be employed to explain the transfer of information during identifying the faults. The mathematical deduction of information Entropy is given and the idea of Multi-Symtom Domains Comprehensive Feature Knowledge to solve fault diagnosis problems caused by insufficient knowledge and lower cognitiving ability for complex knowledge system is presented. 相似文献
9.
For fuzziness classific boundry of fault diagnosis of rotating machinery and traditional neural network algorithms difficulted to solve contradiction between application problems example scale and netwok scale,a methord of self-learning fuzzy spiking neural network is put forward. The methord overcomes unavailability of cluster analysis on classific boundry of fault diagnosis of rotating machinery by species encoding of pulse sequence and unsupervised learning. The method shows that it effectively solves boundary fuzziness problem on fault diagnosis of rotating machinery,and greatly improves efficiency of fault diagnosis. 相似文献
10.
Once fault occurs on the optical cable, it will seriously impair communication. In order to solve the terrible result caused by faults, the system implements the management of the spatial database of the optical cable and the information along it and location fault spots with celerity and legitimacy, according to the spatial and environmental characteristics on geographic distribution of the optical cable network and based on GIS, as it displays the multimedia information around the fault spot, such as landform and physiognomy. Combining the buffer with path analysis function of GIS, the system searches for the optimum path to the fault spot on the optical cable, and also gives emergency schemes to dispose the fault. This application has gained a satisfactory result for effectively managing communication optical cable resources, shortening the repair time, and diminishing the loss caused by faults. 相似文献
11.
On the basis of fault diagnosis expert system, the rough set theory is introduced. Knowledge representation system table is taken as a major tool to reduce the rules of expert system in which unnecessary properties are eliminated. The redundancy of fault diagnosis information is revealed. The complexity of fault diagnosis expert system's structure is also reduced. The decision making rules are given finally. 相似文献
12.
The governing system of hydraulic turbine generator plays an important role in power system. It is significant to find out the faults of governing system and remove them quickly. This paper sets up a new fault diagnosis model of the hydraulic turbine generator governing system with the advanced ANN (artificial neural net). This 17-in-13-out model consists of three layers. It is proved that this model can find the fault accurately. 相似文献
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14.
GPS/DR is a low-cost and high-reliability navigation facility. A federated Kalman filter was designed to real- ize the optimal synthesis of GPS/DR integrated land vehicle navigation system, and its algorithm is presented. A field test was performed. The theoretical analysis and the experiment results both show that, by using this federated Kahnan filter, the positioning accuracy and fault tolerance capability of the GPS/DR integrated navigation system can be greatly improved. 相似文献
15.
Considering traditional current protection cannot satisfy the micro-grid, a system protection solution for the micro-grid is proposed. In this solution, the failure message with direction information can be exchanged among the adjacent protection units, so the fault coverage can be determined and the fault can be quickly cleared. By analyzing the movement of the protection in three kinds of fault conditions in the micro-grid that contains three branches and two micro-power based on inverter, the method has been proved that the fault can be quickly cleared and the protection has the same protection strategies for both islanded and grid-connected operation. 相似文献
16.
Heping Wan Yinke Wei Jiali Qian Yunlei Gao Jing Wen Bin Yi Chaozhi Ma Jinxing Tu Tingdong Fu Jinxiong Shen 《Euphytica》2018,214(10):190
Soil salinization has a major effect on crop yield. Seed germination is a crucial prerequisite for the successful cultivation of rapeseed in saline soils. Limited information is available about rapeseed salt tolerance at germination stage. Here, we carried out an association mapping of salt tolerance QTLs at seed germination stage. We evaluated salt tolerance of 214 rapeseed inbred lines at germination stage, and the 60 K Brassica Infinium® SNP array was used to genotype the association panel. Finally, a total of 110 single nucleotide polymorphisms (SNPs) were associated with three salt tolerance indices and these SNPs were integrated into 44 QTLs. In addition, 56 possible candidate genes were located in or near the genomic region where the above QTLs were mapped. Thus, our results provide valuable information for understanding the genetic control of rapeseed salt tolerance at germination stage and may facilitate marker-based breeding for rapeseed salt tolerance. 相似文献
17.
An algorithm of fault section diagnosis based on topology identification for distribution networks is presented. By decomposing the topologic matrix which describing the distribution network into two parts,one part only contain the complex coupling factor ,and the other ignore the complex coupling factor. Using this method, the fault zones in distribution network can be identified and isolated efficiently, and the vertexes of the zones can also be identified automatically. This approach adapts to the changefully network structures. 相似文献
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19.
CAI Jing zhi 《保鲜与加工》2003,(4):93-95
With the development and application of information and internet and virtual instrument technology ,the virtual globular company based on internet arises .To study remote state monitoring, remote fault detection and diagnosis about large scale, complicated and integrative equipment become very important. In the whole fault diagnosis system , the detecting ,data acquisition is original ,processing; transform and extracting features with the signal detected is a key factor. The theories and methods used in mechanical fault diagnosis is stated. The application of signal process and its feature extracting methods is introduced which are time domain, frequency domain and time frequency domain analysis, in state monitoring and fault diagnosis with its signal analysis. The processing method of random time variant special signal is given also. 相似文献
20.
C. L. A. Leakey 《Euphytica》1973,22(1):132-140
Summary This short review attempts to collect information on Xanthomonas pathogens of beans that is of importance to attempts to breed for tolerance. Sources of immunity are not yet recognized, but tolerance has been reported in several genetic stocks. All inheritance of tolerance so far reported has been quantitative. Some different pathotypes are already recognized and indications are that more of these will be found as they are looked for. Different inoculation methods may be appropriate for detecting different sorts of host tolerance. 相似文献