Applied Mechanics and Materials Vols. 713-715

Abstract: This paper makes study on the adjacent frame difference and algorithm realization of SOM i8dentification after improvement, of which it includes motion detection, target identification; the realized video surveillance module makes up the intelligent video surveillance that can reconstruct platform. Motion detection module adopts algorithm of adjacent frame difference after improvement, which can correctly mark the motion object. Target identification module adopts self-mapping nerve net after improvement, it is easier for hardware realization, and meanwhile the accuracy rate of identification is equal to classical algorithm.

Abstract: This paper puts forwards the problems during the process of conformance test based on the enhanced finite state machine and looks for the description method of the state machine for protocol. Through the analysis of model based on test principle, the protocol conformance testing will be applied based on the enhanced finite state machine test. Through comparing with the traditional test method, study how to design model for protocol, and through executing model produced test, verify the advantage and applicability of model based testing method by testing cases.

Abstract: In order to meet the needs of the construction information industry base, enhance their ability to serve the community, and improve scientific research projects of market-oriented level, then develop family-oriented and school-based intelligent monitoring software system, the development of new products in the smart camera and mobile video surveillance and development of new technologies are developed. It is considered that the electronic information industry needs to develop intelligent monitoring technology industry, the video compression technology and the use of mobile and existing wireless networks are made, such as efforts are used to complete the smart cameras and mobile video surveillance system development, so the development of application research has implemented the front of video surveillance intelligence information collection, transmission of video signals in real time, real-time wireless video signal transmission and other tasks.

Abstract: In this paper, on basis of DPMZM (Dual-Parallel Mach-Zehnder Modulator), an approach for microwave photonic frequency conversion using DSSC(double-sideband suppressed-carrier) and balance detection is demonstrated. DSSC and balance detection were used to realize high harmonic suppression, and achieve frequency conversion signal with high power and high spectrum purity. In addition, theoretical analysis and simulation results show that the optimal modulation index is m1=2, m2=1.81, and the harmonic suppression is greater than 30dB.

Abstract: The effect evaluation of video surveillance system is important for the effect of expected protection on the system. A comprehensive effect evaluation index system of video surveillance system is established. The Principal Component Analysis (PCA) method is applied on the established index system to obtain a new evaluation index system. It is proved in instances that the effect evaluation method of video surveillance system with the application of the index system is capable of evaluating the video surveillance system effectively and quantitatively. The protective effect of the video surveillance system is evaluated objectively on the basis of the new index system with the PCA.

Abstract: Urban water supply pipe network is an important part of municipal infrastructure systems, is the basis for the survival and development of the city. How to guarantee the safety operation of the water supply pipe network, to reduce water supply pipe network leakage rate, to prevent explosion occurred, and fundamentally improve the water supply pipe network operation management level, become the water supply enterprise high attention and urgent problem to be solved. Therefore, this paper studies monitoring system of water supply pipe network based on GPRS. First, the characteristics and the importance of the water supply pipe network, so using GPRS technology. Then, detailing the characteristics and advantages of GPRS technology. Secondly, introduces the composition of the urban water supply pipe network monitoring system. Finally, the realization of specific functions will be described. Application of monitoring system for real-time monitoring, fully guaranteed the security of the water supply system.

Abstract: An execution system of distributed performance testing is designed in this paper, which provides a mechanism of node communication, test script deployment, test scheduling, execution-driving and test result collection in distributed environment. A workload model is established, by which testers can describe the performance testing requirement. A performance testing framework is given, which simulates user behaviors in real environment based on virtual users so as to generate workload from the system under test (SUT). It can control the execution of virtual users by TTCN-3 standard interface. After executing the performance testing, test report is generated by extracting log. A method of generating performance test-case is studied by reusing functional test scripts. By executing performance testing on an online bookstore, this paper demonstrates the availability of the method of reusing TTCN-3 functional test scripts and the capability of distributed performance testing system established.

Abstract: Many traditional tremor sensors are in direct contact with the human body, we tried a new non-contact manner, using the ZigBee standard protocol stack, and constitutes a wireless sensor network (Wireless Sensor Network, WSN), so that it can meet the pathological signal acquisition under low power consumption. In this experiment the main object is to capture the tremor signal from the surface of Parkinson's patients, as well as the feasibility of this new approach. Taking into account the reliability of the data and the transmission efficiency of the whole system, we use the structure of the ZigBee-based star network, and in the receiving terminal to achieve a variety of interfaces to facilitate the transfer, storage and use of other systems and data access.

Abstract: Unbounded browsing software is an application worked in Internet client. It uses a custom encryption protocol to break the traditional network filtering. In this paper, we can detect this application through classifying the Ultra Surf T mode (TCP packets) packets and using SPID. The experimental results show that we can effectively reduce the false alarm rate and detect the application accurately by classifying the Ultra Surf T mode (TCP packets) packets and using SPID.

Abstract: Environmental function matrix computing can provide aircraft data support for guidance instrument systematic error compensation to promote the precision. There were two ways to calculate the environmental function matrix, telemetry data direct computing method and telemetry data iterative computing method. A new iterative computing method with tracing data was put forward. The three methods were compared by using simulated data to do the experiment .It could be concluded that the precision of the tracing data iterative computing method was the best of three methods.