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An Energy-Aware Coverage Based Node Scheduling Scheme for Wireless Sensor Networks

An Energy-Aware Coverage Based Node Scheduling Scheme for Wi...

引用

The 9th International Conference for Young Computer Scientists(第九届国际青年计算机大会)

作者： Jinxia Liu Naijie Gu Songsong He Dept. of Computer Science and Technology University of Science and Technology of China Hefei Anhui 230027 China Anhui Province Key Laboratory of Computing and Communication Software Hefei Anhui 230027 China

A fundamental issue in wireless sensor network is to extend network lifetime while maintaining network coverage and connectivity. Protection for sensors themselves is another important concern. An Energyaware Coverage based Node Scheduling scheme (ECNS) is proposed to provide protection for sensors and guarantees network connectivity and desired coverage level. ECNS enables each node to decide whether it is eligible to turn off to conserve energy through local information exchange with its neighbors. Simulation results show that ECNS improves network performance with respect to energy conservation, load balance and network lifetime.

关键词： Sensor network coverage network connectivity lifetime node scheduling scheme.

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Directed differential evolution based on directional derivative for numerical optimization problems

Directed differential evolution based on directional derivat...

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International Conference on Hybrid Intelligent Systems (HIS)

作者： Jun Zhang Wenjian Luo School of Computer Science and Technology University of Science and Technology Hefei Anhui China Anhui Province Key Laboratory of Software Engineering in Computing and Communication University of Science and Technology Hefei Anhui China

Differential Evolution is one kind of Evolutionary Algorithms, which has been successfully applied to solve many optimization problems. In this paper, a directed differential mutation (DDM), which utilizes the directional derivative to decide a suitable search direction and a proper mutation step size, is proposed. It is merged into the classical DE to form a new algorithm, named directed differential evolution (DDE). The performance of the DDE is tested on 23 classical problems for numerical optimization. The experimental results demonstrate that the performance of the DDE outperforms the classical DE on most functions.

关键词： Optimization Vectors Equations Hybrid intelligent systems Algorithms Programming Maintenance engineering

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A real-time schedule method for aircraft landing scheduling problem based on cellular automaton 09

A real-time schedule method for aircraft landing scheduling ...

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2009 World Summit on Genetic and Evolutionary Computation, 2009 GEC Summit - 1st ACM/SIGEVO Summit on Genetic and Evolutionary Computation, GEC'09

作者： Shenpeng, Yu Xianbin, Cao Maobin, Hu Wenbo, Du Jun, Zhang Department of Computer Science and Technology University of Science and Technology of China Hefei 230026 86-551-3601545 China Anhui Province Key Laboratory of Software in Computing and Communication Hefei 230026 China School of Engineering Science University of Science and Technology of China Hefei 230026 86-551-3600127 China School of Electronic and Information Engineering Beihang University Beijing 100083 China

ISBN: (纸本)9781605583266

The Aircraft Landing Scheduling (ALS) problem is a typical hard multi-constraint optimization problem. In real applications, it is not most important to find the best solution but to provide a feasible landing schedule in an acceptable time. We propose a novel approach which can effectively solve the ALS while satisfying the real-time need. It consists of two steps: (i) Use CA to simulate the landing process in the terminal airspace and to find a considerably good landing sequence;(ii) a simple Genetic Algorithm associated with a Relaxation Operator is used to obtain a better result based on the CA result. Experiments have shown that our method is much faster and suitable for real-time ALS problem compared with traditional optimization methods. For all the 13 data sets, the proposed approach can find satisfactory solutions in less than 2 seconds. Copyright 2009 ACM.

关键词： Cellular automata

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A qualitative modeling and simulation method based on cloud model

A qualitative modeling and simulation method based on cloud ...

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International Conference on Modeling, Simulation and Applied Optimization (ICMSAO)

作者： Chenxi Shao Kelü Sun Zhenzhong Shao Computer Science and Technology Department University of Science and Technology of China Hefei China Anhui Province Key Laboratory of Software in Computing and Communication Hefei China Jianghuai Automobile Company Limited Hefei China

ISBN: (纸本)9781467358125

Qualitative simulation is effective methods processing incomplete knowledge, how to represent qualitative knowledge and reduce spurious behaviors is its research emphasis. Contraposing the limitations of existing methods representing qualitative knowledge and filtering spurious behaviors, an approach is proposed to qualitatively model and simulate on the basis of normal cloud model. In this research, the cloud numeric characteristics and cloud measurement are introduced into this approach; consequently, it can more accurately assess the qualitative knowledge, and expand the variables expression and quantity space; meanwhile, it is constructed the means of modeling and simulation by adopting more amply portraying the system status, more intuitively transforming status and more accurately filtering spurious behaviors. Furthermore, in simulation algorithm, cloud measurement indices are employed to significantly select the successor status which can not be determined by existing constraint means. The results of simulation example demonstrate that our approach effectively improves the ability to filter spurious behaviors, and it is a feasible method.

关键词： Uncertainty Coordinate measuring machines Computational modeling Entropy Measurement uncertainty Numerical models Size measurement

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Airborne moving vehicle detection for urban traffic surveillance

Airborne moving vehicle detection for urban traffic surveill...

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International Conference on Intelligent Transportation

作者： Renjun Lin Xianbin Cao Yanwu Xu Chuangxian Wei Hong Qiao Anhui Province Key Laboratory of Software Computing and Communication University of Science and Technology Hefei China University of Manchester Institute of Science and Technology UK Institute of Automation Chinese Academy and Sciences Beijing China

At present, moving vehicle detection on airborne platform has been an important technology for urban traffic surveillance. In such a situation, most commonly used methods (e.g. image subtraction) could hardly work well because of some additional difficulties such as slow movement of vehicles and jam. This paper proposed a new moving vehicle detection method named MVD-RD for airborne urban traffic surveillance. First, the non-road regions are extracted using road detection technique. Secondly, the non-road regions with no vehicles are removed according to their size. As a result of this two-stage regions shrinkage, the detection area reduces a lot. Finally, to the reduced area, image subtraction is used to get all moving regions and then moving vehicles can be accurately filtered in a simple way. The experimental results show that, compared with traditional image subtraction methods used in airborne moving vehicle detection, the proposed MVD-RD method achieves much better performance in detection rate, false alarm rate, and detection speed.

关键词： Vehicle detection Surveillance Road vehicles Cameras Road transportation Layout Intelligent transportation systems Optical filters Intelligent vehicles Air transportation

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Constructing the Voronoi Diagram of Planar Point Set in Parallel

Constructing the Voronoi Diagram of Planar Point Set in Para...

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International Conference on Computational Intelligence and software Engineering (CiSE)

作者： Lanfang Dong Yuan Wu Shanhai Zhou Anhui Province Key Laboratory of Software In Computing and Communication College of computer science and technology University of Science and Technology Hefei China College of computer science & technology University of Science and Technology Hefei China

By researching Voronoi diagram, parallel algorithm, and divide-and-conquer method, we present a special data structure(change doubly-connected list little) for Voronoi diagram generation in parallel. In this paper we also present two proposal, they are one processor gradually to merge and 22-merger on the parallel machine, the experiment results show that the present algorithm runs faster than the serial program. By analyzing the various results, we should choose the most suitable number of processors according to the point set scale. At last, we can conclude that gradually merger with one processor is better proposal for Voronoi diagram parallel generation.

关键词： Data structures Educational institutions Computer science Parallel algorithms Proposals Switches Merging Concurrent computing Parallel machines Geography

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An Evolutionary Support Vector Machines Classifier for Pedestrian Detection

An Evolutionary Support Vector Machines Classifier for Pedes...

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2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： D. Chen X.b. Cao Y.w. Xu H. Qiao Department of Computer Science and Technology University of Science and Technology Hefei China Anhui Province Key Laboratory Software Computing and Communication Hefei China Institute of Automation Chinese Academy and Sciences Beijing China

In a pedestrian detection system, a classifier is usually designed to recognize whether a candidate is a pedestrian. Support vector machines (SVM) has become a primary technique to train a classifier for pedestrian detection. However, it is hard to give the best training model which has a tremendous effect to the performance of a SVM classifier. In this paper, we design special code/decode scheme and evaluation function for a training model firstly; and then use genetic algorithm to optimize key parameters which represent the SVM training model. Therefore a most suitable SVM classifier can be obtained for pedestrian detection. Experiments have been carried out in a single camera based pedestrian detection system. The results show that the evolutionary SVM classifier has a better detection rate; moreover, RBF kernel is more suitable than polynomial kernel when chosen in an evolutionary SVM classifier for pedestrian detection

关键词： Support vector machines Support vector machine classification Kernel Genetic algorithms Decoding Design optimization Cameras Intelligent robots Computer science Laboratories

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Practical privacy-preserving mixing protocol for Bitcoin

Practical privacy-preserving mixing protocol for Bitcoin

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International Conference on Computer Supported Cooperative Work in Design

作者： Qianqian Chang Lin Xu Lei Zhang Shanghai Key Laboratory of Trustworthy Computing East China Normal University China Science and Technology on Communication Security Laboratory Chengdu China Ministry of Education Engineering Research Center of Software/Hardware Co-Design Technology and Application China

The privacy of Cryptocurrencies are of great concern in various fields. Researches has shown that pseudonyms, which are used in Bitcoin, only provide weak privacy. The privacy of users may be put at risk under deanonymization attacks. The exisiting schemes typically require a trusted-third party to achieve anonymity, however this usually faces a single-point fault. In addition, existing schemes suffer from high communication complexity and impracticality. This paper proposes a practical privacy-preserving mixing protocol for Bitcoin to achieve unlink-ability of input and output address of transactions. Compared to existing schemes, our protocol improves practicality. The communication complexity of our protocol is linearly related to the number of peers. Moreover, our protocol is scalable as it works not only for Bitcoin, but also for other cryptocurrencies.

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The self-adaption strategy for parameter ε in ε-MOEA

The self-adaption strategy for parameter ε in ε-MOEA

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Congress on Evolutionary Computation

作者： Min Zhang Wenjian Luo Xingxin Pei Xufa Wang Nature Inspired Computing and Application Laboratory Department of Computer Science and Technology University of Science and Technology China Anhui Key Laboratory of software in Computing Communication University of Science and Technology China University of Science and Technology of China Hefei Anhui CN Nature Inspired Computing and Application Laboratory Department of Computer Science and Technology of China University of Science and Technology China

A novel self-adaption strategy for the parameter epsiv in epsiv-MOEA is proposed in this paper based on the analyses of the relationship between the value of epsiv and the maximum number of non-dominated solutions. Then this novel strategy is applied in epsiv-MOEA and tested on 10 common benchmark functions. The experimental results demonstrate that even if without the good initial value for the parameter s, epsiv-MOEA with this self-adaption strategy (named Algorithm 1) is able to approximately obtain the expected number of non-dominated solutions, which are very close to and uniformly distributed on the Pareto-optimal front. Furthermore, the genetic drift phenomenon in Algorithm 1 is discussed Two cases of genetic drift are pointed out, and one case can be fixed up by a simple approach proposed in this paper.

关键词： Evolutionary computation

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The Frequency-Time Pre-Allocation in Unlicensed Spectrum Based on the Games Learning

The Frequency-Time Pre-Allocation in Unlicensed Spectrum Bas...

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International Conference on Cognitive Radio Oriented Wireless Networks and communications

作者： Kun Han Jinlong Li Ping Zhu Xufa Wang Anhui Province Key Laboratory of Software in Computing and Communication Department of Computer Science and Technology University of Science and Technology Hefei China Department of Computer Science and Technology University of Science and Technology of China Hefei China

ISBN: (纸本)9781424408146;1424408156

In the wireless network of finite spectrum resource, some communication users probably do not allocate the spectrum so that their communication should be delayed. Thus it is necessary to arrange the communication time of the systems when we allocate the communication frequency. We construct a frequency-time spectrum model and propose a joint pre-allocation in a two-dimension space. Through the distributed games learning algorithm, each system could obtain its communication schedule, which makes the bandwidth utilization achieve a quite high level and arranges the global communication time as short as possible. The experiments show that our results have obvious superiorities in both bandwidth utilization and temporal performance relative to other allocation algorithms.

关键词： Frequency Radio spectrum management Resource management Wireless networks Bandwidth Delay Laboratories Computer networks Computer science Scheduling algorithm

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