Applied Mechanics and Materials Vols. 462-463

Abstract: With the rapid development of Internet, today's society has entered the Internet era, computer network provides a powerful driving force for social and economic development. Improve the students' management level by means of network technology, has a far-reaching significance to the construction of first-class college. This paper focuses on the management system of student information development of college analysis the current situation of college student management work and the construction goal in the future, the student information management system development significance is discussed. Based on the analysis of the technical characteristics of C/S model and B/S model, and according to the characteristics of Guangxi Agricultural-vocational Technique College learn internet system, the software architecture using B/S model the whole system; to improve the treatment efficiency of development scheme by using stored procedures and triggers; on ASP.NET technology and workflow technology are studied; and discusses how to use ADO.NET to access the database using ASP.NET technology to realize the method. This paper adopts XML technology to realize data exchange, the formation of a standard data exchange platform, make the system more open and extensible.

Abstract: In-network caching is one of the key aspects of content-centric networks (CCN), while the cache replacement algorithm of LRU does not consider the relation between the contents of the cache and its neighbor nodes in the cache replacement process, which bring worthless cache block in the cache and reduce the efficiency of the cache. An enhanced LRU cache replacement strategy has been proposed, which can replace the cache block in time that is not requested from other nodes and improve the rate of effective utilization of the cache space. Simulation results show that the A-LRU strategy increases cache hit rate, shortens the data request delay and improves overall network performance, verifies the validity of the A-LRU strategies in CCN.

Abstract: By employing the ASCII type communication protocols between MCU and KingView provided by WellinTech Inc, basing on the analysis of COM port setting and command format of read-write operation between MCU and the KingView, this paper design a read-write operation on floating point data program with C programming language and realize the real-time communication between MCU and KingView successfully, which improved the accuracy and scope of data transmitted between them. Data definition and some key subprograms like serial ports initialization, read floating point data from MCU, write floating point data to MCU are provided in the paper. It has high portability and application value.

Abstract: Pulsed interference signal and pure frequency continuous wave (CW) jamming signal have the same effect on performance of bit error rate (BER). Due to equivalence, we can effectively simplify the complex of the direct sequence spread spectrum (DSSS) communication system. The equivalence will be simulated by the software SystemView in systematic level.

Abstract: The magnetic multiple input algorithms of Wireless Power Transmission (WPT) system as well as many multiple overlapping coils structures in the transmitter side are proposed for the coal mine Internet of the Things (IOT) nodes. Different phase shifts cases for the input signal are considered to study their effect on the efficiency. Simulation results showed that the axial component of magnetic induction resulted from the multiple overlapping coils structure has preferable homogeneous distribution over the traditional single input coil. The proposed system achieved an efficiency value of 60 % for a receiver placed 40 cm away from a 4 coils transmitter comparing to an efficiency value of 50% for the same distance using a single coil transmitter. Simulation results shows that the proposed model is well adapted for the movable charging mode for the IOT nodes in coal mine.

Abstract: Firstly, this paper analyzed the characteristics of the quality signal of the products in B2C e-commerce enterprise based on a large number of documents. And then, according to the game theory, it proposed a risky avoidance model of the quality signal selection of the products of e-commerce enterprises under asymmetry information. Lastly, it summarized several strategies about the quality of the products of signal selection in B2C e-commerce enterprises based on this model.

Abstract: Informatization is an inevitable trend in the world development. Accounting informatization is an important part of enterprise informatization. Focusing on the connotation of accounting informatization, this paper firstly analyzes the current situation of the accounting information in China. Then it points out the existing problems of accounting informatization in China. These problems include lack of understanding of the nature and importance of accounting informatization, lower overall quality of accounting personnel and the lack of integrated talents, realizing information resources sharing with difficulty, blind investment in accounting informatization construction and poor universality and standardization of financial software, and threatened data security. Finally it puts forward the corresponding countermeasures to promote the healthy development of accounting informatization in China.

Abstract: For solving the dynamic addition and removal problems of group-based agents at run-time, PAHIS is developed by analysis and mplementation. Category role, group roles, virtual organisation role, and dynamics rules are conducted in analysis. A self-organising ring-based architectural model has been employed to organise middle agents in implementation. PAHIS is implemented by using C and Socket and can be used as an infrastructure of agent-based hybrid intelligent systems.

Abstract: Presents mapping rules of a real-time system graphics design model to system calls and C++ application framework under Windows CE platform, based on research and analysis for an abstraction executive of real-time software and Windows CE, including the mapping rules of task, semaphore, interrupt and alarm object. The principles of communication between real-time objects and mapping methods are given.

Abstract: During the process of the Smart Grid systems construction, the Safe Access Platform has an increasing important role. Not only could it meet the demand that people of power system can telecommute, but also provides different level of security mechanisms for various smart devices, such as Hand-hold Terminal System PDA, Ultra Mobile Personal Computer (UMPC) and Wireless Data Acquisition Terminal. Determining how to guarantee the internal security and meet the security requirements of access control based on roles is an important subject. The paper presents a new network access control system (NAC system) based on roles. According to the security metrics of the network access equipment (NAE), the NAC system has been designed and implemented to provide different safety strategies for different application scenarios. Besides, 802.1x and L2-IP are discussed specially as the most important key techniques of the implementation of the system.