Applied Mechanics and Materials Vol. 610

Abstract: Development of logistics enterprises have gradually become the bottleneck restricting the rapid development of e-commerce, As a rapid developing domain, logistic enterprise should serve to various kind of companies whose business requirement always change frequently. Under these circumstance ,this paper put forward an idea about logistics cloud platform based on SOA architecture ,which use IT relevant technology to achieve an IT systems which can quick response, efficient reuse and easy to be adaptive to accommodate the business need. In order to meet service characteristics of logistics enterprises, an iBOS (intelligence Business Operating System) is designed and implemented to achieve the rapid development of logistics business, customized service and other functions.

Abstract: In this paper, a joint resource allocation scheme for energy-efficient communication in cooperative orthogonal frequency division multiple (OFDM) networks based on subcarrier pairing (SP) is studied. The problem aimed at maximizing the system energy efficiency (EE) is formulated into a mixed-integer nonlinear programming (MINLP) problem. To solve the complex MINLP problem, we simplify the optimizing model as a typical fractional programming problem by defining the equivalent channel gain, thus Dinkelbach’s method consisting of outer iterations and inner iterations can be used to find the optimal solution to the MINLP problem proposed in polynomial time. Simulation results show that the proposed scheme can improve the system EE and ensure the quality of service (QoS) of users.

Abstract: In order to improve the prediction accuracy of busy telephone traffic, this study proposes a busy telephone traffic prediction method that combines wavelet transformation and least square support vector machine (lssvm) model which is optimized by particle swarm optimization (pso) algorithm. Firstly, decompose the pretreatment of busy telephone traffic data with mallat algorithm and get low frequency component and high frequency component. Secondly, reconfigure each component and use pso_lssvm model predict each reconfigured one. Then the busy telephone traffic can be achieved. The experimental results show that the prediction model has higher prediction accuracy and stability.

Abstract: The paper presents energy-efficiency opportunistic multicast routing protocol (EOMR) for the multicast energy consumption minimization problem in wireless sensor networks. The protocol divides the network into single grids, so each node determines their own coordinates according to the grid, which they locate in a certain period of time. The nodes only need to know the topology of their own grid, instead of the topology of the entire network. Nodes in the same grid determine the priority in light of the upstream and downstream links metrics, and use the opportunistic routing to send messages to the next hop. The destinations calculate the optimal path in accordance with the hops and links cost, and transmission acknowledgement to source along the optimal path selected. If all nodes in the current grid transmission messages failure, the neighbor grids are in charge of retransmission. The results of simulation show that, compared with traditional multicast routing, EOMR is effective in reducing the consumption of links cost, so that it improves the link reliability and reduces the delay.

Abstract: Subway train positioning technology is one of the key technologies, however when red band appears in dispatch center, train ground communication fails and other issues, you need a back-up emergency systems to provide train position information for the station dispatchers in order to arrange train route. This paper describes a back-up system for positioning subway trains. The system is a combination of vehicle and ground subway train assisted positioning system, it can fast and accurate get the location information of subway trains, to provide protection of safe and efficient operation for the subway trains.

Abstract: In order to realize the fusion of secure real-time location of vehicles and reliable communication with the outside world, a vehicle location and communication system was designed based on BeiDou Navigation Satellite System. The embedded Linux operating system platform was proposed with ARM processor S5PV210 as the core. On the basis of open source graphical user interface library QT, BDS was utilized to realize vehicle positioning and short message, GSM for car phone and SMS. The experiments show that the functions are achieved, such as vehicle positioning, car phone, short message and so on.

Abstract: In view of the difficulty of designing a high-order linear phase filter with prototype parameters directly, this paper proposes a new approach to rapidly construct a high order linear phase filter through cascading two same low-order linear phase filters. A twelve-order HTSC cascaded linear phase filter is fabricated on YBCO/LaAlO3/YBCO substrate with the dimension of 44.1mm ×31.4mm. The measured result shows that the filter has a 56 MHz passband at a center frequency of 1993 MHz. The minimum insertion loss in the passband is 0.59 dB. The group delay variation in passband is less than 5 ns over 78.5% of the filter bandwidth which is in good agree with the simulation result.

Abstract: Based on the antenna experiment hardware, an antennas design and testing system is achieved by use of Visual Basic and Flash software development tools. The paper introduces the antenna experiment hardware and antenna pattern and input impedance measurement methods, discusses the overall structure of the system and software design. Take the helical antenna as an example demonstrates the system application in antenna simulation, design, and measurement procedure. The application shows that the self-developed system with interactive, practical and realistic which has been applied to the curricular experimental teaching and extra-curricular innovation, and achieved good results.

Abstract: Through the discussion of the mobile IPv6 intrusion detection model, analysis of mobile IPv6 communication technology, the solutions are given to prevent mobile IPv6 network intrusion behavior for providing the security policy.

Abstract: Route map based on car navigation, multi-point navigation of the same area in different locations and voice navigation with voice broadcast was studied. Achieved an overall system with car navigation map information distribution and voice broadcast using GPS positioning methods MapXtreme technology and improved ant colony optimization based on occasional algorithm. The system solved navigation problems of the shortest path between two points, the shortest time, the optimal K paths and multi-point route planning, as well as the voice-based navigation problems. The whole system worked well and could meet the travel navigation requirements of travelers and relevant departments.