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For wireless sensor networks (WSNs), many factors, such as mutual interference of wireless links, battlefield applications and nodes exposed to the environment without good physical protection, result in the sensor nodes being more vulnerable to be attacked and compromised. In order to address this network security problem, a novel trust evaluation(More)
In wireless sensor networks (WSNs), there are numerous factors that may cause network congestion problems, such as the many-to-one communication modes, mutual interference of wireless links, dynamic changes of network topology and the memory-restrained characteristics of nodes. All these factors result in a network being more vulnerable to congestion. In(More)
A limit DV-hop (LDV-hop) algorithm is put forward based on comprehensive analysis of DV-hop localization algorithms, in order to satisfy the characters of low cost and low power in WSNs. The least hop number between nodes and landmarks is counted firstly and the distance in hops is then computed. Finally the coordinates of nodes are determined. LDV-hop(More)
In light of the problems of low recognition efficiency, high false rates and poor localization accuracy in traditional pipeline security detection technology, this paper proposes a type of hierarchical leak detection and localization method for use in natural gas pipeline monitoring sensor networks. In the signal preprocessing phase, original monitoring(More)
A standalone DC microgrid integrated with distributed renewable energy sources, energy storage devices and loads is analyzed. To mitigate the interaction among distributed power modules, this paper describes a modeling and control design procedure for the distributed converters. The system configuration and steady-state analysis of the standalone DC(More)
A Self-adaption Link-quality Detection Algorithm(SLDA) is proposed to implement the Data Collecting in Opportunistic Sensor Network. The new scheme adopts Self adaptive Link-quality Detection strategy to measure the real time link quality weight factor (LQWF), and combines energy consumption model of mobile nodes to predict optimal transmission path for(More)
Localization is one of the supporting technologies in wireless sensor networks. In this paper, a novel SL-R distributed algorithm is formally described, designed, implemented and evaluated. The algorithm includes two stages. In first stage, sampling is carrying out based on received anchor information and the initial position estimate of sensor node comes(More)