Taking the wireless automatic monitoring for a super long earth-rock dam on Shifosi Liao River trunk stream as the research background, the GPS dam deformation monitoring system based on the GPRS wireless communication technology is studied and developed. The wireless acquisition of GPS raw data and...

The evaluation of node importance is the main research direction in public opinion field, which is much significant to accurately find out the influent nodes for the propagation and evolution of public opinion, furthermore to effective control and predict public opinion situation and in-time guide it....

Localization algorithms continue to be a challenging and important topic in wireless sensor networks (WSNs). To efficiently exploit the normal distribution for range-free localization, we propose two weighted centroid localization algorithms called Positioning Based on Normal Distribution and Positioning...

Considering propagation characteristics of rumor on complex networks, this paper presents a rumor propagation model on complex network with Repast simulation platform. We introduce the structure and the main class library of Repast simulation platform. Then we build an efficient model based on the multi-agent...

Gazetteer service is one of the basic functions ofÿWeb map services, and the search efficiency and accuracy is very important to the user experience. Traditional approach is based on full-text indexing technology. The ranking of search results is mainly based onÿthe relevance of the search keywords....

In the current satellite communication systems, the multi-beam satellite system has been widely used. This paper analyses the typical fixed multi-beam system and designs a simulation program called DRA for beam forming. The beam can have any directivity, and can eliminate interference with the null steering...

Satellite terminal distributed phased array antenna system has a lot of advantages such as good reliability and flexibility. The delay of a signal when it arrives at the receiving end is not the same. Thus in order to combine the signals effectively, it is necessary to align the multiplexed signals in...

In this paper, the traditional LMS algorithm is extended to the real-time multi-reference point algorithm. The adaptive tracking beam is obtained by the mean square error and the minimum optimization criterion. Finally, this paper presents a switching proposal of the tracking beam. In order to better...

Coset coding is a typical method of secure coding in physical layer security. This paper focuses on coset coding based on the random linear codes in binary symmetric channel. While analyzing system security, we derive the formula of eavesdropper's equivocation and proposed a novel code extending algorithm...

The so-called spread OFDM(S-OFDM) system is designed to resist frequency-dependent attenuation by using Walsh-Hadamard (WH) code for spreading the frequency-domain OFDM symbols in the transmitter, and linear detectors, like ZF or MMSE, are usually used to recover the signals in the receiver. In this...

Aiming at the problem of rapid processing of real - time data in intelligent dispatching, a new method for calculating the information flow of distribution network monitoring is proposed. Access the distribution network monitoring data by publishing subscriptions, combining the topology parallel model...

In this paper, we analyze the performance of a delay-tolerable cognitive radio network at the call level, where secondary users detect and opportunistically access the channel resources when no primary users present. An ongoing secondary user using a channel may switch to another channel with some routing...