Advanced Materials Research Vols. 926-930

Abstract: . Fire-control radar network can not only improve the tracking accuracy of the system, but also can take some peculiar mode of networking against enemy reconnaissance aircraft. As opposed to the real test, simulation has a huge advantage in terms of the timeliness and the economy. In this paper, build a netted fire-control radar counter-surveillance network simulation system, and study the main features and workflow of the fusion control center and dispatch center, some key issues are discussed, such as map load and online estimated probability of intercept.

Abstract: With the advent of 4G, OFDM has an increasingly important role in the life of the system. This paper discusses the design simulation of the OFDM communication system, including coding, modulation, IFFT, synchronization, demodulation and decoding modules studied and discussed and cyclic prefix based on training symbol for OFDM system in time and frequency synchronization and phase synchronization algorithm and its performance, then introduced the SCME channel attributes. And those who have the OFDM system in AWGN channel and SCME channel emulation, and performance analysis, consistent with the theoretical performance.

Abstract: Energy conservation is the primary goal for MAC protocol design in Wireless sensor networks. Based on the analysis of the existing low-duty-cycle S-MAC algorithms and the structural features of hierarchy WSN , an adaptive duty-cycle MAC protocol is proposed,which is integrated M/M/1/n queuing system. The new protocol can predict data throughput of next period based on the node’s queue model and then adjust the duty-cycle to achieve energy conservation. Analysis and simulation results show that, compare with S-MAC,the MAC protocol based on M/M/1/n saves about 48% energy, reduces latency by 21% and improves throughput by 33% in a cross topology network,which effectively prolongs the network lifetime.

Abstract: Taking the designed magnetorheological finishing system as the research target, the design method for lower PLC program of the system was introduced firstly, and the main control functions were introduced, including the MCP control, the hand vein control, the move axis control, the alarm control, the circulatory system control and the auxiliary function control of the machine tool. Then, the upper software system integration method was introduced, including the structure of upper software program, the state transition between the control functions and project preparation and performance optimization for the polishing solution. The designed human-computer interface can guarantee high-precision machining of machine tools.

Abstract: RF front-end is an important part of the communication system. It realizes the functions such as low noise amplifier application, filtering and mixing, completes the conversion between the IF signal and the RF signal, and ensures effective communication system flexibility and versatility. In the paper, according to the superheterodyne structure, a receiver RF front-end has been designed. The total gain of the link circuit is more than 100 dB, with 50 dB AGC range, the center frequency is 750 MHz with 100MHz bandwidth, local oscillator (LO) signal with frequency 935MHz is generated by PLL and the stability is-82dBc/Hz@1KHz.

Abstract: With more and more public attention and rapid development of computer and information technology, it is necessary for comprehensive games being equipped with sports training information management system. In this paper, this system carries on collecting ,analyzing, and diagnosing the correlative training information of the athlete, and image analysis and real-time feedback of the technical action, in order to strengthen the high efficient management and training mode for sports team supporting by computer information technology. With the support of this system,the coach can pay more attention to athlete's individual character in proceeding the training, so as to avoid that high level athlete appear the phenomenon that the achievement stagnates for a long time.

Abstract: With popularity of Internet technology in international trade, the demand of electronic commerce information services keeps expanding, and the platform of electronic commerce information services has become key factor in the international trade information management in China to optimize the operation mode of international trade, increase trade opportunities and improve the international competitiveness under global economy integration and information society development .In this paper, the content and characteristics of electronic commerce information service are firstly analyzed ,combined with current situation of information management in international trade and enterprises' Internet infrastructure construction in China, it is proposed to construct an single-window platform, including the national common interface of data exchange, the common data exchange service platform for import and export enterprises, banking, logistics companies and government, and industry cooperative operation platform related to domestic and international trade activities.

Abstract: Digital museum is an important trend in the development of museums in recent years, and virtual reality technology in the digital museum is one of the most important issues in museum construction and it has broad development prospects. This paper aims to research into two kinds of key virtual reality technologies: image-based 360 degree panoramic display and 3D modeling technology, exploring various kinds of virtual museums based on these two technologies. It discusses the advantages and limitations of the various kinds of VDMs and proposes the design of the Virtual Museum based on 360 - degree panorama, web 3D technology and 3D modeling technology. And its application in the design of Xiamen Overseas Chinese Museum has obtained good results.

Abstract: As people for the need on more security, traditional fixed video surveillance cannot satisfied with people’s varying requirements. This paper demonstrates the framework of a set of mobile video surveillance which support CDMA2000/TD-SCDMA/WCDMA network, RTP protocol is chosen as the transport protocol and H.264 is chosen as the video compression standard. Select RTCP protocol gather packet loss fraction parameter that controls the transmission rate of RTP traffic. We analyze RTP/RTCP protocol and media data transmission process in video surveillance system; discuss the current video transmission method in video surveillance system, the problem of packet loss while transporting video data, and extract packet process of RTP packet.

Abstract: Data will be an important resource, including Animal Husbandry, including many of the industry, and even determine the success or failure of an industry. Animal Husbandry management is the behavior of large amount of data, improve the management level of all walks of life requires a lot of long-term data analysis and preparation. The rapid development of China's Animal Husbandry ,but the level of information to stay in the primary stage, the further development of Animal Husbandry, the information necessary to overcome this problem. In this paper, data mining, data warehouse and other new technologies in Animal Husbandry management, large-scale farming, and the government has brought the latest regional regulatory and other management tools and data analysis for the industry to promote mining.