Papers by Keyword: Network Model

Abstract: In this paper the mass flow distribution in zig-zag cooled power transformer windings is shown to play a crucial factor to accurately predict the winding temperature. In order to enable thermo-hydraulic network models for transformer design, new correlations are derived for combining and dividing T-junctions and elbow configurations. Good correspondence is achieved in comparison with CFD simulation results for a zig-zag cooled power transformer winding.

Abstract: This paper introduces the importance of power load forecasting, and makes forecasting based on the power load values collected in Botou City within a week. The conclusion shows that the accuracy of PSO - ELMAN network forecasting results is much higher than that of PSO - BP network forecasting results.

Abstract: The rapid development of economy and science and technology is quite obvious, which makes cars becoming more and more widely into the general family life. With the rapid development of economics and technology; the number of vehicles has largely increased. In this paper, there is the basic organizational framework for intelligent transportation, intelligent transportation network proposed model and its data storage structure, and the important influence on optimal path trajectory intelligent transportation planning. This paper analyzes intersection road network in the distribution based on computer graphics language, type and grade roads. The dynamic mathematical model of single vehicle is used vehicle planning algorithm based on period, effectively avoided the traffic road, reduce vehicle travel cost, improve the real-time effect and accuracy of the vehicle dynamic path. We hope the results and researches could combine with reality in order to reduce traffic congestion.

Abstract: The TTCAN network protocols have been achieved based on the MPC5121e microprocessor in embedded real-time operating system VxWorks. The optimal solution is calling the callback function of the interrupt service routine to complete the CAN network data transmission and using the auxiliary clock to calculate the local time offset.

Abstract: Firstly this paper analyzes the status quo of Chinese underground pipeline management system. Secondly by the use of network data model in grid points set space, the space grid search algorithm and operability analysis algorithm squib are proposed. Finally the water pipe burst pipes analysis of experiments is designed from which the search of the upstream shut-off valve and analysis burst pipes in affected area are realized. Data bottlenecks brought by the vector data in the practical application are solved.

Abstract: With the expansion of private network scale, the shared resource is very rich in its internal. How does the P2P network extend to the private network, and conduct good integration of the resources becomes a much valuable research subject. The paper puts forward a new P2P network model, and describes the network organization mode, the cooperation relations between the nodes, and node join and exit algorithm in detail. The model has highly self-organized and scalability in private internal network; it does not need public network nodes involved in.

Abstract: In view of the phenomenon that the affected area is broader, more severe losses and more difficult to relief in the urban agglomeration after major natural disasters,it is proposed that transport system reliability calculation method which based on BP neural network model.First of all,analyze the urban transport system network after a disaster, using the weight contribution rate analysis method to extract the key nodes in the network; Second, re-integrating the extracted nodes and establishing a new road network model which based on BP neural network;Then, using the cut set algorithm computing network reliability, and combined with the extent of damage of the road network after a disaster, putting forward the calculation method of urban agglomeration road network reliability after disasters; Finally, for example as changsha-zhuzhou-xiangtan urban agglomeration, examining the authenticity of the method.

Abstract: In the planning and operation of distribution network, flow calculation and optimal flow is the hot issue for many experts and scholars to study. In network reconfiguration, service restoration and capacitor configuration, it needs hundreds even thousands times of power flow calculation. So it is very important to propose a suitable optimization algorithm. Based on the three-phase model we proposed hybrid particle swarm algorithm to calculate the three-phase power flow. The method uses the superposition principle. The distribution network is divided into two network models, one is the pure radial network without cyclic structure, and another is the pure cyclic network without radiation structure. We do iterative calculation respectively using hybrid particle algorithm, getting the calculation results. The hybrid algorithm is a new reference for the future optimization of power flow calculation in this paper.

Abstract: Sneak circuit analysis method is moving to intelligent and automation direction, the method based on network flow simulation has some representation. With the expansion of the circuit system topology and the increasement of the component's amount, the analysis time increases and the efficiency is difficult to be guaranteed. To solve this situation, the circuit system can be divided into some blocks for analysis. Based on the network flow simulation model, the adjacency matrix of circuit system is established. The analysis matrix of circuit system is obtained by the simplification of the adjacency matrix; use the analysis matrix as the network model for circuit system partition analysis. Select appropriate point from the network cutting point as the partition point, the circuit system can be divided into some sub-blocks by removing these points. Circuit system stratified analysis principle is proposed; determine the division method and analysis objectives of each convention level. This method can correctly analysis sneak circuit problem for circuit system, effectively reduce the analysis time and improve the analysis efficiency. It can be taken as an effective complement of sneak circuit analysis method based on network flow simulation for engineering application.

Abstract: The pedestrian comfort and safety level in mass transit stations is now attracting more and more attention in the past few years for the reason that the congested pattern in stations resulted from complex pedestrian activities including using the ticket add value machine, buying a ticket, shopping, waiting for services etc. Thus multi-directional pedestrian flows interact with each other and finally formed a relatively complex pedestrian distribution. To evaluate the crowdedness of the station for the convenient of crowd control, the crowded pedestrians are simulated with a heterogeneous network model in combined with a collision avoidance model. Based on the network model, a spatial configuration related station network is constructed, on which pedestrian flow can be formulized. At last, a station flow scenario is simulated and discussed with the formulized model to evaluate the complex activities induced crowdedness in metro station.