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International Conference on Advanced Information Networking and Applications (AINA)

作者： Chao-Tung Yang Kuan-Wei Cheng Kuan-Ching Li High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung Taiwan

ISBN: (纸本)0769522491

In this paper, a parallel loop self-scheduling scheme for heterogeneous PC cluster systems is proposed. Though the proposed scheme does allow users to choose parameters before the execution initialization phase, there are still weaknesses that motivate us to go further with new improvements in that scheme. For instance, a decision on a fixed and monotonous parameter can easily lead to invalid schedule by using previous input information. Thus, it is proposed in this paper a new scheme, where the scheduling parameter can be adjusted dynamically and fit into most widely available computer systems, in order to provide higher overall performance.

关键词： Processor scheduling Dynamic scheduling Load management Master-slave Concurrent computing Distributed computing Clustering algorithms Runtime computer science Scheduling algorithm

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On implementation of an enhanced and integrated parallel programming Web-based toolkit

On implementation of an enhanced and integrated parallel pro...

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International Conference on Information Technology: Research and Education (ITRE)

作者： Kuan-Ching Li Chao-Tung Yang Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung Taiwan High Performance Computing Laboratory Department of Computer Science and Infnmation Engineering Tunghai University Taichung Taiwan

ISBN: (纸本)0780389328

The computing power provided by high performance and low cost PC-based clusters and grid computing platforms are attractive and they are equal or superior to supercomputers and mainframes. In parallel, discussions on how to obtain more computing power from these computing platforms become an interesting issue. The development of applications for these high-performance computing platforms is complicated for several reasons: the complexity of applications themselves, which combines aspects of super computing and distributed computing, and by the need to achieve higher performance. This paper describes the design rationale and implementation of a parallel programming Web-based toolkit, to ease the parallel programming learning process, with the use of Web-based interface. The toolkit has widely been used in MPI parallel programming courses (both in graduate and undergraduate levels) and industry trainings.

关键词： parallel programming Concurrent computing Application software Distributed computing Grid computing High performance computing Visualization computer science Supercomputers Industrial training

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Enhancing Temporal Alignment with Autoencoder Regularization

Enhancing Temporal Alignment with Autoencoder Regularization

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International Joint Conference on Neural Networks

作者： Liquan Nie Yuanyuan Wang Xiang Zhang Xuhui Huang Zhigang Luo Science and Technology on Parallel and Distributed Processing Laboratory College of Computer National University of Defense Technology Department of Basic Courses Army Officer Academy Department of Computer Science and Technology College of Computer National University of Defense Technology

ISBN: (纸本)9781509006212

Temporal alignment aligns two temporal sequences and is quite challenging due to drastic differences among temporal sequences and source data from different views. Canonical time warping (CTW) has shown great potential in temporal alignment tasks because it can reduce data redundancy by transforming high-dimensional data to a lower-dimensional subspace via canonical correlation analysis (CCA). However, CTW cannot uncover the underlying nonlinear structure embedded in the dataset. In this paper, we propose an autoencoder regularized canonical time warping method (AECTW) to overcome this drawback. Specifically, AECTW enhances lower-dimensional representation of each sequence by incorporating an autoencoder regularization, meanwhile reveals the nonlinear structure of features by explicit nonlinear transformation. By these strategies, AECTW significantly boosts CTW in temporal alignment tasks. Experiments on both synthetic data and two practical human action datasets demonstrate that AECTW outperforms the representative DTW-based methods.

关键词： NONLINEAR STRUCTURES data redundancy Dataset synthetic data Alignment Warping Structural properties Canonical Religious Missions Data sources

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Kinematic Characteristics and Dynamics Analysis of the Tetrahedral Deployable Mechanism Based on the Screw Theory

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Jiqiren/Robot 2020年第1期42卷 21-28and38页

作者： Han, Bo Han, Yuanyuan Xu, Yundou Zheng, Dong Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China Department of Mathematics and Computer Science Hengshui University Hengshui053000 China

In order to solve the modeling and analysis problems of the kinematics and dynamics of the spaceborne tetrahedral space deployable antenna, a kinematics and dynamics characteristics analysis method based on screw theory is established. Firstly, configuration and geometric characteristics of the 3RR-3RRR tetrahedral deployable mechanism are analyzed, its screw constrained topology diagram is obtained based on screw theory, and its degree of freedom (DOF) is calculated to be only one. Then, the kinematics analysis of the mechanism is conducted, the velocities of the components are obtained through the combinatorial operation of kinematic twists, and the Jacobian matrix of this mechanism is also obtained. The 6-dimensional acceleration of each component is expressed by the screw derivative, and the angular accelerations and centroid linear accelerations of the node disks and rods are deduced. Finally, the dynamic equation is established based on the Newton-Euler equation and the principle of virtual work, and the numerical calculation and simulation verification are carried out. The simulation results are completely consistent with the numerical results, which verifies the correctness of the kinematics and dynamics characteristics analysis method based on screw theory. Every parameter has clear physical meanings in the analysis based on the proposed method, and the analysis process is easy to program due to its stylization and is suitable for the analysis of such spatial deployable mechanisms. © 2020, science Press. All right reserved.

关键词： Screws

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An Automated Method for Neuronal Spike Source Identification

An Automated Method for Neuronal Spike Source Identification

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International Joint Conference on Neural Networks 2003

作者： Santiago, Roberto A. McNames, James Burchiel, Kim Lendaris, George G. NW Compl. Intelligence Laboratory System Science Portland State University Portland OR United States Biomed. Signal Processing Laboratory Electrical and Computer Engineering Portland State University Portland OR United States Department of Neurological Surgery Oregon Health Sciences University Portland OR United States

Analysis of microelectrode recordings (MER) of extracellular neuronal activity has gained increasing interest due to potential improvements to surgical techniques involving ablation or placement of deep brain stimulators, as is common in the treatment of Parkinson's disease. Critical to these procedures is the identification of different brain structures such as the globus pallidus internus (GPI). Evidence suggests that the spike trains from individual neurons contain enough information to identify the brain structure in which they are located. For the work reported here, spike train data gathered during surgical procedure from multiple patients is used. Using a moving window sampling approach, a novel feature extraction method for spike trains was developed. This method is then used in combination with a support vector classification algorithm. Results strongly indicate that the sampling methods reported here are able to extract the necessary information for highly accurate spike source identification.

关键词： Neurosurgery

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Design issues of a novel toolkit for parallel application performance monitoring and analysis in cluster and grid environments

Design issues of a novel toolkit for parallel application pe...

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International Symposium on parallel Architectures, Algorithms and Networks (ISPAN)

作者： Kuan-Ching Li Hsiao-Hsi Wang Chiou-Nan Chen Chun-Chieh Liu Chia-Fu Chang Chia-Wen Hsu Sheng-Shiang Hung Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung Taiwan Laboratory of Bioinformatics and Computational Biology Department of Computer Science National Tsing Hua University Hsinchu Taiwan

The low-cost and availability of network of workstations have made them attractive solution for high performance computing. Striking progress of network technology in enabling high-performance global computing, with the utilization of cluster and grid technologies, in which computational and data resources in a local or wide area network are transparently employed to solve large-scale problems. In this paper, we present implementation and design rationale of Visuel toolkit for performance measurement and analysis of parallel applications, in cluster and grid environments. Most of performance visualization tools available today for high-performance platforms show solely system performance data (e.g., CPU load, memory usage, network bandwidth, server average load), and thus, being suitable for visualisation of computing platform system activities. The Visuel toolkit, is Web-based interface designed to show performance activities of all computing nodes of a cluster or grid computing platform involved in the execution of a parallel application, such as CPU load level and memory usage of each computing node. In addition, this toolkit is able to display comparative performance data visualizations generated from a number of executions of an application under investigation, analyzing the performance of different implementations. Evaluations using this toolkit show that it outperforms in easing the process of investigation and implementation of parallel applications, in effective way.

关键词： Monitoring Performance analysis Grid computing computer networks Data visualization High performance computing computer interfaces Concurrent computing Availability Workstations

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Type Synthesis of Ring Truss Deployable Antenna Mechanism Based on Screw Theory

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Yuhang Xuebao/Journal of Astronautics 2019年第7期40卷 831-841页

作者： Han, Bo Xu, Yun-Dou Han, Yuan-Yuan Yao, Jian-Tao Zhao, Yong-Sheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China Department of Mathematics and Computer Science Hengshui University Hengshui053000 China

Based on the screw theory, the type synthesis of the ring truss deployable antenna mechanism is studied. Firstly, the constrained synthesis method based on the screw theory is briefly introduced, and the deployment principle of the ring truss deployable antenna mechanism is analyzed. Then, the ring truss mechanism is divided into two parts, the upper ring edge and the lower ring edge, the ring truss mechanism can be obtained by constructing the ring edge mechanisms and connecting the upper and lower ring edges. Furthermore, the prismatic joint (P) ARE used to describe the movement characteristics of each node, the analysis and synthesis of the ring edge mechanisms are carried out by the constraint synthesis method based on the screw theory, 16 kinds of constraint branch mechanisms are obtained, and two kinds of constraint branch mechanisms are selected through analysis and optimization. The ring edge link mechanisms are obtained by combining the constraint branch mechanisms, and four ring truss deployable mechanisms are obtained through different connection combinations. Finally, three-dimensional models are built in Solidworks software for the four kinds of ring truss deployable mechanisms, and the deployable features of the four mechanisms are verified by the movement simulation. The research provides a new idea for the synthesis of the deployable antenna mechanisms, and the ring truss mechanisms obtained have a good application prospect in the field of space deployable antenna. © 2019, Editorial Dept. of JA. All right reserved.

关键词： computer software

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Who Should Review this Pull-Request: Reviewer Recommendation to Expedite Crowd Collaboration

Who Should Review this Pull-Request: Reviewer Recommendation...

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Asia-Pacific Conference on Software Engineering

作者： Yue Yu Huaimin Wang Gang Yin Charles X. Ling National Laboratory for Parallel and Distributed Processing College of Computer National University of Defense Technology Changsha China Department of Computer Science The University of Western Ontario London Ontario Canada

Github facilitates the pull-request mechanism as an outstanding social coding paradigm by integrating with social media. The review process of pull-requests is a typical crowd sourcing job which needs to solicit opinions of the community. Recommending appropriate reviewers can reduce the time between the submission of a pull-request and the actual review of it. In this paper, we firstly extend the traditional Machine Learning (ML) based approach of bug triaging to reviewer recommendation. Furthermore, we analyze social relations between contributors and reviewers, and propose a novel approach to recommend highly relevant reviewers by mining comment networks (CN) of given projects. Finally, we demonstrate the effectiveness of these two approaches with quantitative evaluations. The results show that CN-based approach achieves a significant improvement over the ML-based approach, and on average it reaches a precision of 78% and 67% for top-1 and top-2 recommendation respectively, and a recall of 77% for top-10 recommendation.

关键词： Communities Rails Training Software Encoding Mathematical model Social network services

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Configuration Design and Mobility Analysis of the Scissors Overconstrained Double-Ring Truss Deployable Antenna Mechanism

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Jiqiren/Robot 2019年第3期41卷 362-371and383页

作者： Han, Bo Han, Yuanyuan Xu, Yundou Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China Department of Mathematics and Computer Science Hengshui University Hengshui053000 China

Based on the overconstrained scissors mechanism unit, a scissors overconstrained double-ring truss deployable antenna mechanism is constructed as a support mechanism for the satellite antenna. Firstly, the configuration mechanism and overconstraint characteristics of the scissors overconstrained double-ring truss mechanism are analyzed, and the units of the whole truss mechanism are decomposed. Then, the geometric conditions for the ring structure of the scissors overconstrained double-ring truss mechanism are derived in consideration of the effects of joint size. Furthermore, the screw constraint topology of the decomposed mechanism units is drawn based on the graph theory and screw theory, and the mobilities of the closed-loop deployable mechanism unit and the double-ring truss mechanism are analyzed. The result shows that the mobility of the whole double-ring truss mechanism is the same as that of the closed-loop deployable mechanism, with only one mobility. Finally, a simulation model of the double-ring truss deployable antenna mechanism is built, the deploying process of the whole double-ring truss is simulated, and the deployable feature is verified. The proposed scissors overconstrained double-ring truss deployable antenna mechanism has only one mobility, its kinematic joints are all revolute joints, and the movement form is simple. © 2019, science Press. All right reserved.

关键词： Screws

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Decision tree construction for data mining on grid computing environments

Decision tree construction for data mining on grid computing...

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International Conference on Advanced Information Networking and Applications (AINA)

作者： Chao-Tung Yang Shu-Tzu Tsai Kuan-Ching Li High-Performance Computing Laboratory Department of Computer Science and Information Engineering Tunghai University Taichung Taiwan Parallel and Distributed Processing Center Department of Computer Science and Information Management Providence University Taichung Taiwan

ISBN: (纸本)0769522491

In this paper, the authors presented the grid-based decision tree architecture, with the intention of applying it to both parallel and sequential algorithms. Also, it is shown that, based on the scope and model of data mining applied in the grid environment as well as user equivalent perspective, grid roles can be categorized into three types. It was aimed, through these definitions, to help software developers define clear system processes and differentiate the application scope for software applications. To fulfill the architecture, an existing parallel decision tree algorithm was first applied (the SPRINT algorithm) to the grid environment. The performance and differences in many other areas are compared using datasets of different sizes. The experimental results will be used for future reference and further development.

关键词： Decision trees Data mining Grid computing computer architecture Clustering algorithms Concurrent computing Distributed computing computer science Application software Chaos

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