نتایج جستجو برای: sensors network
تعداد نتایج: 750789 فیلتر نتایج به سال:
We focus on the problem of energy-efficient convergecast in sensor networks. This problem identifies the energy-latency tradeoff during convergecast. Whenever a group of sensors communicate an event of interest, the latency involved in delivering such messages to the base station should be minimized. Since the sensors are constrained by limited power and are mostly idle, it is important that th...
In this article we explain the architecture for the environment and sensors that has been built for the European project URUS (Ubiquitous Networking Robotics in Urban Sites), a project whose objective is to develop an adaptable network robot architecture for cooperation between network robots and human beings and/or the environment in urban areas. The project goal is to deploy a team of robots ...
Wireless Integrated Network Sensors (WINS) provide distributed network and Internet access to sensors, controls, and processors embedded in equipment, facilities, and the environment. WINS combine sensor technology, signal processing, computation, and wireless networking capability in an integrated system. Integrated circuit technology now enables construction of sensors, radios, and processors...
One of the most important and basic problems in Wireless Sensor Networks (WSNs) is the coverage problem. The coverage problem in WSNs causes the security environments is supervised by the existing sensors in the networks suitably. The importance of coverage in WSNs is so important that is one of the quality of service parameters. If the sensors do not suitably cover the physical environments th...
The characteristic requirement that Intelligent Transportation Systems have for information on the transport network can often be satisfied by the wealth of available data gathered by statically deployed sensors, such as induction loops. Data derived from dynamically deployed sensors, for example, GPS sensors mounted on probe vehicles travelling on the network, can capture additional informatio...
The sensor network localization problem with distance information is to determine the positions of all sensors in a network, given the positions of some of the sensors and the distances between some pairs of sensors. A definition is given for a sensor network in the plane to be “sequentially localizable.” It is shown that the graph of a sequentially localizable network must have a “bilateration...
The sensors in the wireless sensor network are resource constraint devices. The sensors are powered by batteries which is the most critical resource with the sensors. The limited battery limits the lifetime of the entire network. Due to more workload, some nodes die quickly which can affect the connectivity and coverage of the network. So the residual energy with remaining nodes gets wasted. Re...
We present an approach to provide Intrusion Detection Systems (IDS) facilities into Wireless Sensors Networks (WSN). WSNs are usually composed of a large number of low power sensors. They require a careful consumption of the available energy in order to prolong the lifetime of the network. From the security point of view, the overhead added to standard protocols must be as light as possible acc...
The positioning of sensors in Wireless Sensor Network WSN affects coverage, communication cost and resource management.In non-deterministic deployment, mobility feature of the mobile ad-hoc network can be best exploited to reposition the sensors so as to achieve the best network coverage. The Uncovered Region Exploration Algorithm (UREA) is one such algorithm proposed in [1] for redeployment of...
We describe a stochastic network interdiction model for locating sensors that detect nuclear material. A nuclear material smuggler selects a path through a transportation network that maximizes the probability of avoiding detection. An interdictor installs sensors to minimize that maximum probability. We formulate this problem as a bi-level stochastic mixed-integer program, and then focus on a ...
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