Recently there have been growing interests in the applications of wireless sensor networks. Innovative techniques that improve energy efficiency to prolong the network lifetime are highly required. Clustering is an ef...
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The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated ...
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ISBN:
(纸本)0769529097
The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated data gathering on sensor networks;coverage-preserving data gathering in wireless sensor networks;tasks allocation for real-time applications in heterogeneous sensor networks;communication optimization algorithms based on extend data flow graph;study on distributing pattern of shared data in CC-NUMA system;a novel algorithm for load balancing in distributed systems;a replication and cache based metadata management system for data grid;new synchronization scheme between audio and video;a new scheme for off-line signature verification using DWT and fuzzy net;and new kind of hybrid filter based on the peak-and-valley filter and PCNN.
distributed Intrusion Detection System (DIDS) is one of important devices for information security. In this field, how to improve detection rate is one of key issues. In this paper, the importance of event sequence in...
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ISBN:
(纸本)9780769529431
distributed Intrusion Detection System (DIDS) is one of important devices for information security. In this field, how to improve detection rate is one of key issues. In this paper, the importance of event sequence in time is presented. Then, we discuss three factors, i.e. timestamp precision, time synchronization and network delay, which effect detection rate on the view of event sequence in time. On the three aspects, timestamp precision is the key to keep internal event sequence, time synchronization is the base of correcting event sequence among computers, and that network delay makes time-series analysis not true. Accordingly, we address some methods, i.e. raising timestamp precision, active self-adapting time synchronization algorithm and state turnabout mechanism. Experiments indicate that anyone of three measures can elevate detection performance to a certain extent. If they all are adopted, better detection results are revealed
Targeted immunization has been studied as an applicable measure for network epidemics. Unless global information is collected, existing targeted strategies are short of strength in organizing a potent structure to spr...
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ISBN:
(纸本)0769529097
Targeted immunization has been studied as an applicable measure for network epidemics. Unless global information is collected, existing targeted strategies are short of strength in organizing a potent structure to spread the vaccines fleetly. We propose a novel dynamic immunization mechanism, called OnRipple, to propagate vaccines in Susceptible-Infected-Removed (SIR) epidemiological model. With a light-weighted, scalable and distributed framework and an "axis" structure, OnRipple builds-up an effective overlay network. Thus, nodes have essential sampling information of the whole network and targeted immunization can be easily implemented. Nodes are also able to radiate vaccines to both nearby and distant participants almost at the same time. We analyze the performance of this strategy by simulations on small-world networks. On average, OnRipple is 34% faster than traditional targeted immunization. It is proven to be flexible and effective in large-scale peer-to-peer (P2P) networks and scale-free networks.
The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated ...
详细信息
ISBN:
(纸本)0769529097
The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated data gathering on sensor networks;coverage-preserving data gathering in wireless sensor networks;tasks allocation for real-time applications in heterogeneous sensor networks;communication optimization algorithms based on extend data flow graph;study on distributing pattern of shared data in CC-NUMA system;a novel algorithm for load balancing in distributed systems;a replication and cache based metadata management system for data grid;new synchronization scheme between audio and video;a new scheme for off-line signature verification using DWT and fuzzy net;and new kind of hybrid filter based on the peak-and-valley filter and PCNN.
The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated ...
详细信息
ISBN:
(纸本)0769529097
The proceedings contain 542 papers. The papers discussed include: research on threshold denoising of FPRGA;study on heuristic algorithm for dynamic scheduling problem of earth;lifetime optimized methods of correlated data gathering on sensor networks;coverage-preserving data gathering in wireless sensor networks;tasks allocation for real-time applications in heterogeneous sensor networks;communication optimization algorithms based on extend data flow graph;study on distributing pattern of shared data in CC-NUMA system;a novel algorithm for load balancing in distributed systems;a replication and cache based metadata management system for data grid;new synchronization scheme between audio and video;a new scheme for off-line signature verification using DWT and fuzzy net;and new kind of hybrid filter based on the peak-and-valley filter and PCNN.
The distributed video coding (DVC) is a new coming video compression technology that utilizes a different computing complexity mode from the traditional video codec. As a new paradigm there are some fundamental and ha...
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ISBN:
(纸本)0769529097
The distributed video coding (DVC) is a new coming video compression technology that utilizes a different computing complexity mode from the traditional video codec. As a new paradigm there are some fundamental and hard questions in DVC that are not sufficiently addressed, for example the complexity balance between DVC encoder and decoder. This will be an important factor for some promising real time applications. In this context, this paper studies the factors which affect the decoding complexities of turbo code based DVC especially focuses on quantization, side information and turbo code bit rates. Analyzing and simulation results show that precise side information will decrease the turbo decoding complexity, large reductions in computations can be traded against relatively small increases in bit rate, and uniform quantizer possesses the advantage than the non-uniform quantizer in computation load at a expense of a little decrease in rate distortion performance.
Reducing communication overhead is extremely important for parallelizing compiler to generate efficient codes for distributed memory machines. In this paper a redundant parallel execution model (RPEM) is used as the m...
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ISBN:
(纸本)0769529097
Reducing communication overhead is extremely important for parallelizing compiler to generate efficient codes for distributed memory machines. In this paper a redundant parallel execution model (RPEM) is used as the model for target programs. The extend data flow graph is introduced, and optimization algorithms based on the data-flow analysis are discussed. The overhead of data flow analysis can be reduced by performing analysis on the extend data flow graph. The analysis helps to reduce the redundant communication overhead. These optimization algorithms are able to perform inter-loop and inter-procedure analysis. Experimental results prove that these optimizations algorithms are effective in reducing both the number of communications and the communication volume.
The topological properties of Peer-to-Peer (P2P) overlay networks are critical factors that dominate the performance of these systems. The P2P networks need a topology with arbitrary size and degree, while the Kautz d...
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ISBN:
(纸本)0769529097
The topological properties of Peer-to-Peer (P2P) overlay networks are critical factors that dominate the performance of these systems. The P2P networks need a topology with arbitrary size and degree, while the Kautz digraph is a topology with good properties such as constant degree and optimal network diameter O(log(d) n). In this paper, We describe that KZCAN is a navel P2P network with constant expected degree. It is based on an overlay network preserving Kautz digraph connections dynamically, and on a distributed hash table (DHT) supporting efficient publish and search procedures. KZCAN shows that the DHT scheme with constant expected degree and can achieve log(d)(n/(d+1))+1 diameter. The routing length of KZCAN is shorter than CAN or D2B with the same degree when the P2P network is large scale.
How to, eliminate redundant communications is a key issue in developing, parallelizing compilers for distributed' memory, machines. An important way, to) improve the, performance of the code generated by paralleli...
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ISBN:
(纸本)0769529097
How to, eliminate redundant communications is a key issue in developing, parallelizing compilers for distributed' memory, machines. An important way, to) improve the, performance of the code generated by parallelizing compiler in distributed memory systems is to eliminate as much communications as possible. This paper investigates algorithms for generating communications code from previously published work and modifies them to eliminate redundant communications. Based on the mathematical model of symbolic coefficient linear inequalities the revisited formal specification of communications sets are presented and the corresponding improved algorithms are given. Experimental results indicate that the new algorithms can reduce communication messages and improve the performance of parallelized code significantly.
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