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The current distribution in aluminum reduction cells is of great significance, but currently adopted simple detection methods and analytical tools can not meet the need for its current distribution on-line monitoring. The paper, based on the principle of anode and cathode equal-distance voltage measurement, with successful integration of advanced wireless sensors network technology and dynamic web...
Self-deployment is one of the main research issues in wireless mobile sensor networks. It determines quality of service of networks, such as coverage and connectivity. In this paper, we present a distributed self-deployment algorithm by distance and orientation control (DOC). Distance control tries to keep the distance among sensor nodes equal to the ideal distance in equilateral triangle grid deployment,...
Recent advances in wireless communications and electronics have promoted the development of wireless sensor networks (WSN) for a wide variety of applications. The size and power constraints of sensor nodes are the main concerns in the design of robust and efficient routing protocols. Consequently, various approaches, such as data-centric approach, hierarchical approach and location-based approach,...
This research aims to develop a new sensor-based localization technique which is exclusively used for forest fire detecting systems. Our algorithm addresses three key criteria of forest fire detecting systems deployed in nature, which are: low complexity, high efficiency and low power consumption, by the 2 features: estimating a grid-based output and adopting an event-triggering mechanism. The algorithm's...
Accurate clock synchronization is essential in the operation of Sensor Networks. Algorithms for clock synchronization generally rely on estimators of the relative offset and frequency of two different clocks. Sensor Networks have limited power resources so it is important that these estimators not be too computationally intensive. For this reason a number of least squares-based estimators have been...
In this paper, the patterns for k-coverage (2≤k≤4) based on optimal l-connectivity (3≤l≤6) patterns are deeply discussed and a series of deployment patterns for k-coverage and l-connectivity are proposed under different ratios of sensor communication range (denoted by Rc) over sensing range (denoted by Rs) for Wireless Sensor Networks (WSNs). The patterns proposed are based on regular graphs and have...
Currently, there are some classical routing protocols for WSNs (Wireless Sensor Networks) such as LEACH [3] and PEGASIS [5]. However, most of these routing protocols do not consider the communication range and cannot guarantee the connectivity of the network. In this paper, we propose an improved routing protocol called CECS (Connectivity-guaranteed and Energy-efficient Clustering Scheme) which has...
In this paper we focus on the survivability of wireless sensor network and develop a model to evaluate the tradeoffs between the cost of defense mechanisms for wireless sensor network and the resulting expected survivability after a network attack. We demonstrate the model through simulations its effectiveness in mitigating such attacks. Our analysis of the impact of these attacks versus the adversary's...
There are two states in event-driven wireless sensor network, one is non-event state, and the other is event state. In non-event state, the network traffic is very small and the requirement for real-time performance of network is not strict. However, in event state the traffic is large, the critical information would be lost once the link quality goes bad without responding timely. This paper does...
The communications are interrupted by the hidden terminals in the traditional MAC protocols when the nodes?? power is asymmetric in WSN networks. On the basis of S-MAC the improved protocol is proposed. Node judges whether the power asymmetric nodes are occurred in the vicinity of it according to the link state with neighborhood nodes. Then neighborhood nodes broadcast bandwidth reservation (BRES)...
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