Applied Mechanics and Materials Vols. 416-417

Abstract: Recent work has shown the full duplex transmission scheme to allow nodes to send and receive in the same frequency at the same time. In this paper, we investigate the impact of analog cancellation error on the bit error rate (BER) performance of full duplex wireless communication system. Considering the transmission delay error, amplitude error and phase error of analog cancellation, we derive the analytic BER expression of binary phase shift keying (BPSK) in additive white Gaussian noise (AWGN) channel. The analysis results show that BER generally decreases with timing and amplitude error decreases for fixed signal to interference rate (SIR). Compared with the ideal analog cancellation system, the performance loss 0.3dB when the phase error is 0.0001 degree, carrier frequency is 800MHz and SIR is 100dB.

Abstract: The ordinary cloud system is confronted with various threats in trust and security perspective, which have influenced the extensive use of cloud system. Aiming at the defects in the trusted secure design of the ordinary cloud system frame, a trusted secure cloud system has been designed.

Abstract: with the rapid development and wide application of wireless networking technology, Information security issues are increasingly prominent manifested by more and more attention. The article describes the schema of the data monitoring platform separate from the data layer, network layer and presentation layer three levels,focuses on platform of intelligent back-end database structure, and proposed specific measures to ensure platform security,to ensure the information security of computer networks, so as to give full play role of computer networks.

Abstract: The reliability of computer interlocking system security has a close tie with many aspects such as the data information transmission accuracy of the entire system. If the reliability of the system security is not high, security-related accidents will be very easily caused in enterprises and bring about huge losses to enterprises, so study on the design of computer interlocking system security's reliability is of great significance. In this paper, based on the introduction to the basic functions and composition of computer interlocking system, several factors influencing the design of computer interlocking system security's reliability are analyzed from both hardware and software, and finally several design plans targeted at how to improve the reliability of security are proposed.

Abstract: WebService is a service oriented architecture technology, application services to support different platform interactive operation. Although can use the open XML standards to publish, coordination and configure the web application, there are practical problems to be solved on the Web Services in both technology and application level. WebService based on the SOAP data exchange protocol and HTTP communication protocol , Its security is one of the practical considerations, This paper discusses how to build secure WebService access from the control point of access model strategy, implementation of WebService security communication.

Abstract: With the increasing types of goods and materials as well as the frequency of in-out stock, warehouse, as the key link of supply chain management, is mainly responsible for managing goods and materials efficiently in a unified manner. In order to realize completely automatic and wireless management, this paper introduces ZigBee into warehouse management according to the practical situation. It gives a brief account of the basic functions of smart warehouse management system and makes an overall design of the SWMS based on ZigBee. It also verifies its feasibility by testing the performance of the actual system.

Abstract: Internet of Things has received more and more attention, due to a wide range of potential applications. In this paper, we propose a secure data aggregation framework for the Internet of Things. It is based on fully homomorphic encryption. Moreover, this is a form of encryption where any specific algebraic operation performed on the raw sensor data is equivalent to the same algebraic operation performed on the cryptographic sensor data.

Abstract: DEM construction quality directly affects a variety of applications based on DEM and terrain analysis. Giving the error in measured data, interpolation methods affect the quality of DEM. Therefore, for a certain district, choosing a better interpolation method is very important. In this paper, we constructed new DEM by three interpolation methods (inverse distance weight, spline, Kriging) on the real DEM data of loess tableland. By comparing this new DEM with the original DEM and analyzing this new DEM, we can get a better choice of interpolation for DEM construction and terrain analysis for a certain district.

Abstract: Aiming at the current situation that the sales decisions of real estate are difficult to be made by the decision maker due to the lack of information during the decision-making process, a decision support model based on the UML modeling language and decision support theories has been proposed in this paper, which designs the modules and system sequence in the decision support system according to the acquisition, operation and output of real estate information. Targeting at the new decision support model, specific implementation steps have been put forward, modeling with UML to provide system modeling mode for the future real estate enterprise.

Abstract: Electrical and mechanical engineering is the main object of industrial science and technology research, which greatly promotes the reform and development of industrial science and technology. Open system is a term widely used in the fields of computer system structure, computer system, computer software and communication system, as well as the main representation of multi-function application of information technology. This thesis first of all makes an introduction of the application characteristics of open system. It then makes an analysis of the development trend of electrical and mechanical engineering and the process of electrical and mechanical open system information exchange based on it, so as to contribute to the following researches.