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International Conference on computer Supported Cooperative Work in Design

作者： Adriana S. Vivacqua Marcos S. Ferreira Jano M. de Souza PPGI/DCC-IM-Department of Computer Science Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil PESC-COPPE-Graduate School of Engineering Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil

Meetings take a large amount of time, and frequently, meeting facilitators are called in to help steer the meeting in the right direction. Unfortunately, facilitation is still something of an art. To assist facilitators, the thinkLet technique has been proposed. Through the use of thinkLets, facilitators may plan the meeting beforehand, deciding which activities to perform at each point. However, designing a meeting is not an easy task, especially for novice facilitators. In this paper we present AgendBuilder, a system to assist the design of meetings, electronic or otherwise, using thinkLets and compatibility rules. The system helps facilitators select and link thinkLets together in and orderly fashion, designing the meeting in the process.

关键词： Process design Meeting planning Collaborative work computer science Design engineering Art Decision making Productivity Scheduling Monitoring

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On some recent advances in synchronization and control of Complex Networks

On some recent advances in synchronization and control of Co...

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IEEE International Symposium on Circuits and systems (ISCAS)

作者： Jinhu Lü Guanrong Chen Mario di Bernardo School Electrical & Computer Engineering RMIT University Australia LSC Acad. Mathematics & System Science Chinese Academy and Sciences Beijing China Department of Electronic Engineering City University of Hong Kong Hong Kong China Department of Engineering Mathematics University of Bristol Bristol UK

The aim of this paper is to introduce the special session on Recent Advances in Complex Networks: Theories and Applications at ISCAS 2010 by giving a brief outline of the subject and presenting some recent advances in a field of our own interest, i.e., Control and Synchronization of Complex Networks, with special attention to adaptive synchronization and control strategies.

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Hybrid uniform distribution of particle swarm optimizer

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IEICE Transactions on Fundamentals of Electronics, Communications and computer sciences 2010年第10期E93-A卷 1782-1791页

作者： Zhang, Junqi Tan, Ying Ni, Lina Xie, Chen Tang, Zheng Department of Computer Science and Technology Key Laboratory of Embedded System and Service Computing Ministry of Education Qingdao China Tongji University Shanghai 200092 China Key Laboratory of Machine Perception Ministry of Education Qingdao China Department of Machine Intelligence School of Electronics Engineering and Computer Science Peking University Beijing 100871 China College of Info Sci and Engi Shandong University of Science and Technology Qingdao China Department of Intellectual Information Systems Engineering University of Toyama Toyama-shi 930-8555 Japan

Particle swarm optimizer (PSO) is a stochastic global optimization technique based on a social interaction metaphor. Because of the complexity, dynamics and randomness involved in PSO, it is hard to theoretically analyze the mechanism on which PSO depends. Statistical results have shown that the probability distribution of PSO is a truncated triangle, with uniform probability across the middle that decreases on the sides. The "truncated triangle" is also called the "Maya pyramid" by Kennedy. However, very little is known regarding the sampling distribution of PSO in itself. In this paper, we theoretically analyze the "Maya pyramid" without any assumption and derive its computational formula, which is actually a hybrid uniform distribution that looks like a trapezoid and conforms with the statistical results. Based on the derived density function of the hybrid uniform distribution, the search strategy of PSO is defined and quantified to characterize the mechanism of the search strategy in PSO. In order to show the significance of these definitions based, on the derived hybrid uniform distribution, the comparison between the defined search strategies of the classical, linear decreasing weight based PSO and the canonical constricted PSO suggested by Clerc is illustrated and elaborated. Copyright © 2010 The Institute of Electronics, Information and Communication Engineers.

关键词： Probability distributions

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Method for universal combat platform simulator based on domain component model

Method for universal combat platform simulator based on doma...

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International Conference on Information science and engineering (ICISE)

作者： Shufen Liu Weifeng Xu JinHong Zhao Jun Peng Xiaodi Zhang Department of Computer Science and Technology Jilin University Changchun China System Engineering Research Institute China State Shipbuilding Corporation Beijing China Linjiang City People's Procuratorate Baishan China

A method for universal combat platform simulator development based on domain model and component technology is proposed. On the high abstraction level, domain model can be used to obtain demand model in the special domains, based on which different business objects should be mapped to different components. Basic Framework describes the combat platform commonness and provides its variety extensions in which corresponding components can be integrated into the simulator. In this way, all kinds of combat platform simulators can be developed. This method is capable to capture domain commonness and control variability successfully. For this reason, the reusability and interoperability of a military simulation software are both greatly improved.

关键词： Business Computational modeling Object oriented modeling Data models Software Data processing Human computer interaction

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Face annotation for online personal videos using color feature fusion based face recognition

Face annotation for online personal videos using color featu...

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IEEE International Conference on Multimedia and Expo (ICME)

作者： Jae Young Choi Konstantinos N. Plataniotis Yong Man Ro Image and Video System Laboratory Korea Advanced Institute of Science and Technology Daejeon South Korea The Edward S Rogers Sr Department of Electrical and Computer Engineering University of Toronto Toronto ONT Canada

This paper proposes a novel weighted feature fusion in color face recognition (FR) to automatically annotate faces in personal videos. In the proposed FR method, multiple face images (belonging to the same subject) are clustered from a sequence of video frames. To facilitate a complementary effect on improving annotation performance, the grouped faces are combined using the proposed weighted feature fusion. In addition, we make effective use of facial color feature to cope with decrease in annotation performance due to a low-resolution face in personal videos. To evaluate the effectiveness of proposed FR method, more than 40,000 video frames for 10 real-world personal videos are collected from an existing online video sharing website. Experimental results show that the proposed FR method significantly improves annotation performance obtained using conventional grayscale image based FR methods.

关键词： Face Videos Image color analysis Feature extraction Training Power capacitors Accuracy

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CantorSim: Simplifying Acceleration of Micro-architecture Simulations

CantorSim: Simplifying Acceleration of Micro-architecture Si...

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International Symposium on Modeling, Analysis and Simulation of computer and Telecommunication systems (MASCOTS)

作者： Zhibin Yu Hai Jin Jian Chen Lizy K. John Service Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China Department of Electrical and Computer Engineering University of Texas Austin Austin TX USA

Many techniques have been developed to accelerate micro-architecture simulation since it is becoming increasingly urgent as the complexity of workloads and simulated processors increases. However, most of popular techniques need profiles or trial simulations to determine parameters before real simulations. When the number of dynamic instructions of workloads such as SPEC CPU2006 is huge, the profiles or trial simulations often take a long time. What's worse, any changes of benchmarks need to repeat the above work. This paper proposes a novel approach based on fractals to solve this problem. It employs the generation procedure of trisection Cantor Set, a classic fractal, to select instructions simulated in detail. We implement a simulator named CantorSim using the trisection Cantor fractal approach. The simulator is evaluated with benchmark programs from SPEC CPU2000 and SPEC CPU2006. We show that our approach is micro-architecture independent as the same parameter value for a single program yields similar results on processors with different configurations. The unified analytical model used to determine sampling parameters for different benchmarks indicates the proposed approach can save a lot of time for preparing parameters. On the other hand, for SPEC CPU2000 and SPEC CPU2006, CantorSim is slightly faster than SMARTSim. The validated average CPI relative errors of the SPEC CPU2000 and SPEC CPU2006 are 3.2% and 2.2% respectively. Therefore, our proposed approach can simplify acceleration of simulations significantly without sacrificing speed and accuracy.

关键词： Fractals Benchmark testing Acceleration Computational modeling Accuracy Predictive models Program processors

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Object rigidity and reflectivity identification based on motion analysis

Object rigidity and reflectivity identification based on mot...

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IEEE International Conference on Image Processing

作者： Di Zang Paul R. Schrater Katja Doerschner Department of Computer Science and Engineering University of Minnesota USA Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji China National Research Center of Magnetic Resonance and Department of Psychology Bilkent University Turkey

Rigidity and reflectivity are important properties of objects, identifying these properties is a fundamental problem for many computer vision applications like motion and tracking. In this paper, we extend our previous work to propose a motion analysis based approach for detecting the object's rigidity and reflectivity. This approach consists of two steps. The first step aims to identify object rigidity based on motion estimation and optic flow matching. The second step is to classify specular rigid and diffuse rigid objects using structure from motion and Procrustes analysis. We show how rigid bodies can be detected without knowing any prior motion information by using a mutual information based matching method. In addition, we use a statistic way to set thresholds for rigidity classification. Presented results demonstrate that our approach can efficiently classify the rigidity and reflectivity of an object.

关键词： Optical imaging Adaptive optics Mutual information Shape computer vision Integrated optics Object recognition

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An active uplink photonic antenna

An active uplink photonic antenna

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Asia-Pacific Conference on Applied Electromagnetics, APACE

作者： N. F. Nanyan Siti Zaiton Mohd Hashim R. Ngah Y. Rahayu T. Prakoso Wireless Communication Centre Faculty of Electrical Engineering Universiti Teknologi Malaysia Johor Malaysia Department of Software Engineering Faculty of Computer Science & Information System Universiti Teknologi Malaysia Malaysia Faculty of Mechanical Engineering Universiti Malaysia Pahang Kuantan Pahang Malaysia

This paper presents a wideband photonic antenna consisting the laser diode, matching circuit, RF amplifier and microstrip patch antenna are fabricated and connected together to perform in uplink system. Laser driver is used to supply the dc biasing for the laser. Lastly, the LD-matching circuit, RF amplifier and antenna were arrange together and connected to perform the wireless uplink system. The simulated and measured results are presented and discussed. These results show useful photonic antenna design that achieves relatively wide bandwidth and has potential to be applied in RoF technology.

关键词： Photonics Microstrip antennas Antenna measurements Frequency measurement Diode lasers Microstrip

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Enhanced weakly trained frontal face detector for surveillance purposes

Enhanced weakly trained frontal face detector for surveillan...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Wael Louis K. N. Plataniotis Yong Man Ro Multimedia Laboratory Edward S. Rogers Department of Electrical and Computer Engineering University of Toronto Toronto Canada Image and Video System Laboratory Korea Advanced Institute of Science and Technology Daejeon South Korea

Face detection is becoming popular in surveillance applications; however, the need of enormous size face/non-face dataset, large number of features, and long training time are persistent problems. This paper claims that only a subset of the total number of features conserves the major power to detect faces; hence, this subset is capable to detect faces with high detection rate. The proposed detector fuses the results of two classifiers where one is trained with only 40 Haar-like features and the other is trained with only 50 LBP Histogram features. A pre-processing stage of skin-tone detection is applied to reduce the false positive rate. The detector is examined on real-life low-resolution surveillance sequence. Conducted experiments show that the proposed detector can achieve a high detection rate and a low false positive rate. Also, it outperforms Lienhart detector and tolerates wide range of illumination and blurring changes.

关键词： Feature extraction Face Detectors Histograms Pixel Training Face detection

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Reduction Criteria for Probabilistic Models with Spatial Restrictions on States

Reduction Criteria for Probabilistic Models with Spatial Res...

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International Conference on Networks Security, Wireless Communications and Trusted Computing, NSWCTC

作者： Niu Jun Guosun Zeng Embedded System and Service Computing Key Laboratory Ministry of Education Shanghai China College of Information Engineering Zhejiang Business and Technology Institute Ningbo China Department of Computer Science and Technology University of Tongji Shanghai China

ISBN: (纸本)9781424465972;9780769540115

Partial order reduction techniques have been used to combat the state explosion problem in model checking procedures for concurrent systems with probabilistic behaviors. There are some results that give criteria on applying partial order reduction for verifying quantitative time properties and reward-based properties on actions. However, there are many situations that reward-based properties are expressed on states rather than on actions because actions are triggered in no time and the quantities can not be obtained easily. This paper presents reduction criteria for a probabilistic temporal logic that allows specification of restrictions on quantitative measures given by spatial resources function for the states of the considered system and provides the proof of the correctness.

关键词： Explosions computer networks Concurrent computing Embedded computing Educational technology Probabilistic logic Communication system security computer security Information security Wireless communication

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