Applied Mechanics and Materials Vols. 668-669

Abstract: In this paper, Firstly, the follower jamming and the jamming ellipse are introduced; After studying the jamming ellipse and combining the mathematical model of FH signal, the mathematical model of follower jamming is built; the performance of FH communication under the follower jamming is analyzed; Finally, the anti-jamming measures of follower jamming are proposed, In the future research, these can supply the foundation for the feature extraction of the follower jamming identification.

Abstract: The development of Internet of things eventually depends on the strength of industry chain. It is crucial for Internet of things that all parties in industry chain make progress together and develop synergistically. In this way, Internet of things can be developed more powerfully and widely. Therefore, the research on problems about synergistic development of the industry chain in Internet of things is significant for our country’s industry of internet of things to develop soundly, stably and continuously. The thesis applies the method of fuzzy comprehensive evaluation based on value net, to evaluate the industry chain in Internet of things in three levels, including management synergy, operational synergy and synergy between products and applications. Then the thesis analyzes the results of the evaluation in order to promote the research in relevant fields as a reference.

Abstract: At the information age, the traditional GIS has already can't satisfy people's demand for real-time access to geographic information, such as typhoon weather phenomenon change at any time. Based on ArcGIS Server platform and Java technology, the typhoon information query system of B/S architecture has been designed. The system can complete the space mapping service release and attribute information query, spatial orientation, motion path of dynamic display, for the typhoon weather forecasters and the public provide real-time access information query platform. At the same time, aiming at common bottlenecks in Web GIS application, the paper puts forward the optimization of the data and the establishment of cache. Experiments show that these two methods in reading speed and response speed figure have improved significantly.

Abstract: Multi-Protocol Label Switching has provided a perfect framework for the joint optimization of IP service. Satellite interconnection becomes an important candidate for the construction of next generation satellite network. This paper aims at researching satellite MPLS network. Two typical simulation scenarios are simulated in OPNET to test label switching, label distribution and quality of service(QoS)[1] guarantee of satellite MPLS network. Finally, the feasibility of satellite MPLS network and its capability of improving QoS are verified.

Abstract: In view of the fixed communication facilities damaged and unable to work for the rain or snow disaster in the mountains area, the emergency communication system based on the mobile Internet of things (M-IoT) is proposed. To ensure the safety and liquidity of the rescue line and effectively deliver rescue personnel and materials, the proposed system can be used to real-time monitor the bridge collapse, the landslide and the dammed lake. At first, the network construction of the proposed M-IoT is described in detail. Then, this question, how to realize the effective transmission of sensing information in mountain disaster emergency communication system, is discussed. Finally, the network performance is gotten by OPNET software establishing simulation model. The results show that the proposed system has strong ability of network information transmission and can meet the demand of mountain disaster emergency communication support.

Abstract: With the existence of traditional SOC chip, the encryption and decryption speed and low power cannot meet the computing needs of the modern diversity, then we present a heterogeneous multi-core system which designed based on shared memory on the Xilinx Virtex-5 platform. This paper is in-depth research about heterogeneous multi-core password architecture, static task partitioning, scheduling strategy and the communication mechanism between cores. The three cores systems are designed and builded based on shared memory to realize ZUC algorithm which generates a stream cipher on virtex-5 platform. The three microblaze cores are responsible for inter-core communication, the implementation of ZUC algorithm and articulating IC card to read keys. Through the design of three cores system, give full play to the hardware, software and computer architecture parallelism at all levels to improve the performance of the algorithm to achieve high performance green computing.

Abstract: With the rapid development of wireless communication and wireless sensor network, there are a large number of application requirements of indoor positioning service, so it is very significant to the study of indoor positioning technology. The paper studied the indoor real-time location technology of ZigBee and designed the real-time positioning system, which included gateway, reference node, and blind node, monitoring software of computer and RSSI location algorithm. STM32 was used to control the gateway, which was integrated with ZigBee module and WiFi module. Reference node and blind node were communicated through CC2530.Monitoring system calculated the blind nodes’ coordinate based on the improved three edge location algorithm. Using computer simulate it, the results show that this method has low consumption, the characteristics of high precision, and has certain practical value.

Abstract: Mobile IPv6 is an extension of traditional IP that can provide mobility support at the network layer.The article lists the status of IPv6 network to analyze the technical characteristics of the next-generation network.Problem to be solved on the IPv6 network mobility conditions and the implementation of mobility.This dissertation researches the mechanism of Mobile IPv6 deeply and analyzes all phases of communication in detail.Formed a set of network solutions in the network provided by the internet server provider.

Abstract: While solving problems concerning routing selection, admission control, and service flow QoS guarantee etc., researchers are required to analyze the network and solve the QoS performance metrics. To address the requirements rising from different network problems, this paper is trying to build a model of the network node ‘adaptive living’ and to find solutions by network calculus. This model reflects the real-time service capability of network node as adapting to the change of environment, the change of network topology and service need. In the future, it can be widely used in solving problems of network performance analysis.

Abstract: With rapid information technology development, the accumulation of data and applications are becoming more and more urgent. Data is growing faster and faster, so "massive, explosive growth," words just can't describe today's data growth, data mining from the knowledge or information is found in the repository, which has special meaning for humans to deal with these data provide a convenient and effective way. Between big data and data mining technologies have an inseparable relationship.