To act an appropriate response for intelligent system, it is necessary to obtain sufficient information as possible. Wireless sensornetworks technology is one of possible solutions that can provide intelligent system...
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To act an appropriate response for intelligent system, it is necessary to obtain sufficient information as possible. Wireless sensornetworks technology is one of possible solutions that can provide intelligent system with sensing information of specific task. However, a large number of data transmissions for a long period of time might cause sensor node to lose its functionality. This is because sensor nodes have the restriction of energy, computing capability, and communication bandwidth. Therefore, data aggregation mechanism is one of possible solutions to prolong the life time of sensor nodes. In this paper, we present an automatic routing scheme for data aggregation using geographic information. Clustering the entire interesting field and chaining interesting nodes with " virtual link " of which " virtual path " is composed are proposed. The simulation results show that the proposed method can effective save transmission energy and bandwidth utilization.
By interacting with external sensors, smartphones can gather high-fidelity data on the surrounding environment to develop various environment-aware, personalized applications. In this work we introduce the sensor virt...
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By interacting with external sensors, smartphones can gather high-fidelity data on the surrounding environment to develop various environment-aware, personalized applications. In this work we introduce the sensor virtualization module (SVM) which virtualizes external sensors so that smartphone applications can easily utilize a large number of sensing resources. Implemented on the Android platform, our SVM simplifies the management of external sensors by abstracting them as virtual sensors to provide the capability of resolving conflicting data requests from multiple applications and also mashing-up sensing data from different sensors to create new customized sensors. We envision our SVM to open the possibilities of designing novel personalized smartphone applications.
The development of ambient intelligence environments has become a complex task and faces several challenges due to improved sensing possibilities and new fields of application, like detecting activities of daily livin...
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At present retrieval methods in remote sensing image database are mainly based on spatial-temporal information. The increasing amount of images to be collected by the ground station of earth observing systems emphasiz...
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ISBN:
(纸本)0819446637
At present retrieval methods in remote sensing image database are mainly based on spatial-temporal information. The increasing amount of images to be collected by the ground station of earth observing systems emphasizes the need for database management with intelligent data retrieval capabilities. The purpose of the proposed method is to realize a new content based retrieval system for remote sensing images database with an innovative search tool based on image similarity. This methodology is quite innovative for this application, at present many systems exist for photographic images, as for example QBIC and IKONA, but they are not able to extract and describe properly remote image content. The target database is set by an archive of images originated from an X-SAR sensor (spaceborne mission, 1994). The best content descriptors, mainly texture parameters, guarantees high retrieval performances and can be extracted without losses independently of image resolution. The latter property allows DBMS (Database Management System) to process low amount of information, as in the case of quick-look images, improving time performance and memory access without reducing retrieval accuracy. The matching technique has been designed to enable image management (database population and retrieval) independently of dimensions (width and height). Local and global content descriptors are compared, during retrieval phase, with the query image and results seem to be very encouraging.
Wireless sensornetworks have gained importance in various domains due to their rapid development in the past years. However, their greatest limitation remains energy. The lifetime of the sensor network depends on the...
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ISBN:
(纸本)9781424426737
Wireless sensornetworks have gained importance in various domains due to their rapid development in the past years. However, their greatest limitation remains energy. The lifetime of the sensor network depends on the amount of energy consumption that reflects the amount of data processing done locally in the sensor network. Limited energy resource to the sensor becomes an obstacle for its applications. Research efforts have been focused on energy saving techniques. This paper proposes a technique that determines the redundancy of the nodes and manages to maintain the degree of coverage with the minimum of sensors that are active. The algorithm gains its effectiveness by choosing in each moment the optimal sensor that offers the best coverage. Experimental results are presented to show the efficiency of the method in prolonging the network lifetime with minimum losing of coverage.
The proceedings contain 53 papers. The topics discussed include: robust web service provisioning through on-demand replication;modelling and maintenance of very large database schemata using meta-structures;SOM-Based ...
ISBN:
(纸本)9783642011115
The proceedings contain 53 papers. The topics discussed include: robust web service provisioning through on-demand replication;modelling and maintenance of very large database schemata using meta-structures;SOM-Based dynamic image segmentation for sign language training simulator;agile software solution framework: an analysis of practitioners's perspectives;facilitating interorganisational collaboration via flexible sharing of rapidly developed web applications;sales forecasting using an evolutionary algorithm based radial basis neural network;micro implementation of join operation at clustering nodes of heterogeneous sensornetworks;facilitating reuse of code checking rules in static code analysis;achieving adaptively through strategies in a distributed software architecture;improving product usage monitoring and analysis with semantic concepts;and using GA and KMP algorithm to implement an approach to learning through intelligent framework documentation.
The increased need for mobility has led to transportation problems like congestion, accidents and pollution. In order to provide safe and efficient transport systems great efforts are currently being put into developi...
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We address the problem of optimizing the detection performance of sensornetworks under communication constraints on the common access channel. Our work helps understanding tradeoffs between sensor network parameters ...
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We address the problem of optimizing the detection performance of sensornetworks under communication constraints on the common access channel. Our work helps understanding tradeoffs between sensor network parameters like number of sensors, degree of quantization at each local sensor, and SNR. Traditionally, this problem is tackled using asymptotic assumptions on the number of sensors, an approach that leads to the abstraction of important details such as the structure of the fusion center. We adopt a non-asymptotic approach and optimize both, the sensing and the fusion sides with respect to the probability of detection error. We show that the optimal fusion rule has an interesting structure similar to the majority-voting rule. In addition, we study the convergence with respect to the number of sensors of the performance of the fusion rule. We show that convergence is SNR dependent and that, in low-SNR environments, asymptotics may require a large number of sensors.
With recent advances in wireless communication and low cost, low power sensors are enabling the deployment of large-scale and collaborative wireless sensor network (WSN), which performs different tasks using the subse...
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This paper presents a Bayesian multi-sensor tracking strategy for a network of autonomous underwater vehicles (AUVs) for the purpose of anti-submarine warfare (ASW). A bistatic configuration and the corresponding acou...
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