The Wireless Sensor Networks (WSNs) are composed of sensor nodes that are deployed in remote and hostile environments to sense, process and communicate vital information to the base station. Due to the stringent constraints on the resources in the sensor nodes, it is essential to optimally devise the WSN operational paradigms, to minimize the resource overhead. Since, communications costs alway...

The Wireless Sensor Networks (WSNs) are composed of resource starved sensor nodes that are deployed to sense, process and communicate vital information to the base station. Due to the stringent constraints on the resources in the sensor nodes on one hand and due to the communications costs being always significantly higher than the data processing costs, the WSNs typically, employ in-network pr...

This paper divides the execution process of command post system into four stages: information acquisition, processing, decision control and response execution. It combines multilayer complex networks with a phased-mission system. Most studies have only evaluated reliability systems. evaluates optimizes In order to improve mission success rate maximize system, this provides multitasking node cri...

Ad-hoc Network is new paradigm of wireless communication for mobile host. In MANETs some of the nodes do not take part in forwarding packets to other nodes to conserve their resources such as energy, bandwidth and power. The nodes which act selfishly to conserve their resources are called selfish nodes. The selfish nodes are engaged to reduce data availability and produce high communication cos...

We present SGuard, a new fault-tolerance technique for distributed stream processing engines (SPEs) running in clusters of commodity servers. SGuard is less disruptive to normal stream processing and leaves more resources available for normal stream processing than previous proposals. Like several previous schemes, SGuard is based on rollback recovery [18]: it checkpoints the state of stream pr...

The multi-threaded implementation presented in the previous column (July/August, 2003) sets the stage for the distributed processing implementation to be presented in this column. Please see the previous two columns for the details regarding the TSP best-first branch and bound algorithm that forms the basis for the work that shall be described in this column. Class Node is unchanged from the si...

The traditional way of museum exhibition is physical exhibition, which essentially restricted by the venue, time, space, and display conditions no longer applicable to form modern exhibits. Therefore, with development a large number technologies such as information technology, wireless sensor technology image processing cultural relics also tends be more intelligent intelligent. Based on this, ...

We introduce novel localization techniques for wireless image sensor networks. Based on visual observations between the image sensor nodes or simultaneous observations of a moving object by several nodes, the proposed schemes employ simple image processing functions to obtain angular bearing information between the nodes in a neighborhood and solve for the node positions. We will first propose ...

Wireless ad-hoc network contains many wireless nodes. Each node may have a low battery power. When energy of any node is exhausted, the failed nodes cannot relay the data to other nodes during transmission processing. It will cause wireless network leaks. Thus, the other nodes will be burdened with increased transmission processing. It is important to optimization research of replacement of nod...