Applied Mechanics and Materials Vols. 373-375

Abstract: With the continuous advance of mobile Internet applications and deepening of the mobile node based multicast applications are rapidly expanding, which prompted about IP multicast technology moves towards greater efficiency requires rapid expansion. This detailed analysis of the current source mobile support the technical characteristics of the pros and cons of various options, from mobile multicast nature of the fundamental dilemma facing the Institute and gives a general conclusion. Meanwhile, according to the technical characteristics of the mobile anchor point MAP, as a starting point, the initial build a more comprehensive source mobile multicast algorithm, given the basic principles and operation points, so show a good efficacy with, the extension movement of multicast frame shape.

Abstract: Aircraft climbing problem is a typical hard multi-constraint optimization problem. In real applications, it is not most important to find the best solution but to provide a feasible climbing schedule in an acceptable time. Scheduling aircraft climbing is a complex task encountered by most of the control towers. In this paper, we study the aircraft climbing problem in the multiple runway case. This paper proposes a method based on neural network which can effectively solve the aircraft climbing problem while satisfying the real-time need.

Abstract: Taking into account the gradually expanded scale of large interconnected power system, especially the UHV synchronous grid successfully puts into operation. Traditional centralized computing will encounter the bottleneck of hardware computing power. A protection setting online checking hybrid parallel algorithm based on P2P is proposed. Peer-to-peer communications using P2P network technology to achieve inter-regional information fast interactive. The design of MPI+OpenMP hybrid parallel programming models and algorithms is emphatically introduced. Online checking two levels parallel of process-level and thread-level is achieved through the parallel analysis of online checking. Finally, the hybrid parallel algorithm was tested and compared based on P2P technology distributed parallel computing platform. The results show that the proposed algorithm is correct and effective.

Abstract: The article aims at making scientific and accurate prediction of the current flow of passagers based on its characteristics, which is nonlinear and is influenced by various factors. Clustering is used to make classification of IC card data.Then ARMA prediction model is installed and the model parameter is worked out through matrix method and revised by the method of particle filtering. Resampling is also conducted through genetic optimization. The data of rail transit of Chongqing City of June, 2012 is used to make verification.The result shows that the prediction of optimize parameters through the method of particle filtering is close to the real values. The MAE is 0.8154,MAPE is 1.755,so this method in our article can make the prediction of passenger flow volume more accurately.

Abstract: A new hybrid intelligent technique is proposed to evaluate photovoltaic cell model parameters in this paper. The intelligent technique is based on a hybrid of genetic algorithm (GA) and LevenbergMarquardt algorithm (LMA). In the proposed hybrid intelligent technique, the GA firstly searches the entire problem space to get a set of roughly estimated solutions, i.e. near-optimal solutions. Then the LMA performs a local optima search in order to carry out further optimizations. An example has been used to demonstrate the evaluation procedure in order to test the performance of the proposed approach. The results show that the proposed technique has better performance than the GA approach in terms of the objective function value, the computation time and the reconstructed I-V curve shape.

Abstract: With the increasing numbers of passengers, it is very difficult for ticket selling work. In this paper, the design of auto ticket selling system is an information management system integrated by wireless asynchronous communication technology, video and image process technology, data encryption and large scale database technology. By using this system, the passengers can search the information and buy tickets automatically to reduce the passengers' waiting time. It has been applied to one passenger station in Liaoning province, and it has a good effect.

Abstract: The article introduces essential method to realize the high accuracy and velocity FIR filter by FPGA. Proposes the FIR filter optimization scheme design of serial shifts based on FPGA. Avoided the shortcoming of the traditional parallel algorithm module taking the massive hardware resources . And give 11-order and 8-bits low pass filter design as the specific research object. Realized the partial functions which the traditional numeral FIR filter cannot.May adjusts the filter exponent number conveniently and suits different application.

Abstract: Active Front Steering (AFS) is an important application to improve the stability of the vehicle, and the driver characteristic is also an important factor for the vehicle stability. In this article, a driver-behavior-based prediction control algorithm for AFS is proposed. According to the informed road trajectory, the ideal preview driver model is introduced to predict the future steering wheel angle. Based on this, a two-degree-of-freedom (2DOF) reference vehicle model and a PID controller are used to generate active steering control. The algorithm is verified by Carsim and Matlab/Simulink co-simulation, and the results show that trajectory tracking of the vehicle can be guarantee and driver manipulation duty can be reduced.

Abstract: The cluster technology is used more and more widely in fields of oil exploration, aerospace engineering, biological engineering, etc, the application requirements of different type nodes make cluster system harder and harder to manage in the cluster environment. In the paper, with the conception of cluster technology, applying xCAT+shell and Qt platform in Linux, the cluster deployment system has been designed and implemented to configure and distribute centrally different types of nodes in the cluster.

Abstract: The paper is based on PSCAD/EMTDC. The basic structure and operation principle of DFIG are analyzed and the mathematical model of DFIG is established, based on which the control system of rotor-side and grid-side converters is set up. The stator flux-oriented vector control is adopted for rotor-side converter. The no-load grid connection is realized before cutting in and control strategy is switched after grid connection successfully. DFIG can meet grid connection condition quickly with the control strategy and is connected to grid with no current shock nearly. The output of active and reactive power can be regulated respectively.