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A Lie-group Approach for Solving Backward Two-dimensional Nonlinear Klein-gordon Equation

Procedia Engineering 2014年 79卷 590-598页

作者： Chih-Wen Chang Chia-Chen Kuo National Center for High-Performance Computing No. 22 Keyuan Rd. Central Taiwan Science Park Taichung City 40763 Taiwan National Center for High-Performance Computing No. 7 R&D 6th Rd. Hsinchu Science Park Hsinchu City City 30067 Taiwan

In this paper, the backward two-dimensional nonlinear Klein-Gordon equation is solved by using a Lie-group approach. Because the solution does not continuously depend on the presented data, the inverse problem is famous for seriously ill-posed. A numerical example of the backward nonlinear Klein-Gordon equation demonstrates that this method is applicable, and the computational cost is quite cheap. Although the recovery of a presently wave is from the final time and under a large noise imposed on the final time data, this algorithm still works effectively and accurately. These numerical results are rather important in the computations of backward nonlinear Klein-Gordon equation.

关键词： Nonlinear Klein-Gordon equation Backward wave problem Inverse problem Strongly ill-posed problem Backward group preserving scheme (BGPS).

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Covariance based fish tracking in real-life underwater environment

Covariance based fish tracking in real-life underwater envir...

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International Conference on Computer Vision Theory and applications, VISAPP 2012

作者： Spampinato, Concetto Palazzo, Simone Giordano, daniela Kavasidis, Isaak Lin, Fang-Pang Lin, Yun-Te Department of Electrical Electronics and Computer Engineering University of Catania Viale Andrea Doria 6-95125 Catania Italy National Center of High Performance Computing No. 7 R and D 6th Rd. Hsinchu Science Park Hsinchu City Taiwan

ISBN: (纸本)9789898565044

In this paper we present a covariance based tracking algorithm for intelligent video analysis to assist marine biologists in understanding the complex marine ecosystem in the Ken-ding sub-tropical coral reef in Taiwan by processing underwater real-time videos recorded in open ocean. One of the most important aspects of marine biology research is the investigation of fish trajectories to identify events of interest such as fish preying, mating, schooling, etc. This task, of course, requires a reliable tracking algorithm able to deal with 1) the difficulties of following fish that have multiple degrees of freedom and 2) the possible varying conditions of the underwater environment. To accommodate these needs, we have developed a tracking algorithm that exploits covariance representation to describe the object's appearance and statistical information and also to join different types of features such as location, color intensities, derivatives, etc. The accuracy of the algorithm was evaluated by using hand-labeled ground truth data on 30000 frames belonging to ten different videos, achieving an average performance of about 94%, estimated using multiple ratios that provide indication on how good is a tracking algorithm both globally (e.g. counting objects in a fixed range of time) and locally (e.g. in distinguish occlusions among objects).

关键词： Fish

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Incorporating daily rainfall to derive at-site hourly depth-duration-frequency relationships

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Journal of Hydrologic Engineering 2009年第9期14卷 992-1001页

作者： Wu, Shiang-Jen Tung, Yeou-Koung Yang, Jinn-Chuang National Center for High-Performance Computing 7 R and D 6th Rd. Hsinchu 30076 Taiwan Dept. of Civil and Environmental Engineering Hong Kong Univ. of Science and Technology Clear Water Bay Kowloon Hong Kong Dept. of Civil Engineering National Chiao-Tung Univ. 1001 University Rd. Hsinchu 300 Taiwan

Two models are herein presented to derive at-site hourly based rainfall depth-duration-frequency (ddF) relationships by incorporating daily rainfall information. The model development is motivated by the desire to utilize daily rainfall data that are in existence prior to the conversion from a manned gauge to an automatic one for improving the establishment of hourly based rainfall ddF relation at the site. The performance of the proposed models is assessed by comparing the rainfall ddF relationships derived from the conventional method using solely annual maximum rainfalls of various durations. Hourly rainfall data at Hong Kong Observatory over the period of 1884-1990 are used to demonstrate the application of the two proposed models and to examine their performance. results from the numerical experiments show that the two proposed models, which incorporate daily rainfall data, are capable of producing more accurate and reliable rainfall ddF relationships than the conventional method solely on the basis of annual maximum hourly rainfalls. © 2009 ASCE.

关键词： rain

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The problems and the solutions of the metacomputing experiment in SC99 8th

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8th International Conference on high performance computing and Networking, HPCNEurope 2000

作者： Pickles, Stephen Costen, Fumie Brooke, John Gabriel, Edgar Müller, Matthias resch, Michael Ord, Stephen Manchester Computing The University of Manchester Oxford Road ManchesterM13 9PL United Kingdom High Performance Computing Center Stuttgart Allmandring 30 StuttgartD-70550 Germany N.R.A.L. Jodrell Bank Macclesfield CheshireSK11 9DL United Kingdom

ISBN: (纸本)9783540675532

An intercontinental network of supercomputers spanning more than 10000 miles and running challenging scientific applications was realized at the Supercomputing’99 (SC’99) conference in Portland, Oregon, USA using PACX-MPI and ATM PVCs. In this paper, we describe how we constructed the heterogeneous cluster of supercomputers, the problems we confronted in terms of multi-architecture and the way several applications handled the specific requirements of a metacomputer. © Springer-Verlag Berlin Heidelberg 2000.

关键词： Supercomputers

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Implement the PIC-MCC simulation of ECr plasma source on PC cluster with drBL, an effective approach to integrate PC cluster

Implement the PIC-MCC simulation of ECR plasma source on PC ...

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9th IEEE International Workshop on Cellular Neural Networks and their applications, CNNA

作者： Shiau, J.H. Hu, Y. Lin, T.L. Huang, K.L. Department of Engineering and System Science National Tsing Hua University 101 Section 2 Kuang Fu Road Hsinchu 30013 Taiwan National Center for High-Performance Computing 7 R and D Rd. VI Hsinchu Sci. Park Hsinchu 30077 Taiwan

A parallel 2d3v PIC-MCC (particle-in-cell plasma simulations and Monte Carlo collisions) code is developed with message passing language PVM to simulate the electron cyclotron resonance plasma source in this research. This code has been run on a PC cluster with a cluster system we developed called "diskless remote Boot in Linux (drBL)", which is a centralized boot and management environment. By using drBL, it's easier for us to integrate some PCs to a cluster system. Once we have some computing power, with the grid technology, we can harvest more by sharing the computing resources with others. This is a new approach to harvest more computing power. With the PIC-MCC simulation of ECr plasma source, the results and benchmark for different cluster architectures are given and discussed.

关键词： Plasma sources

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A new bio-inspired location search algorithm for peer to peer network based Internet telephony 06

A new bio-inspired location search algorithm for peer to pee...

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Bio-Inspired Models of Network, Information and computing Systems, BIONETICS

作者： Sachin Kulkarni Niloy Ganguly Geoffrey Canright Andreas deutsch Department of Computer Science and Engineering Indian Institute of Technology Kharagpur Kharagpur India R&D Telenor Oslo Norway Center for Information Services High Performance Computing Dresden Germany Center for Information Services and High Performance Computing (ZIH) TU-Dresden Dresden

ISBN: (纸本)9781424404636

In this paper, we propose a p2p network based location search algorithm which can be used to establish connections in Internet telephony. By using the location search algorithm, the caller can identify the peer it is calling. The algorithm is based upon the concept of gradient search and is applicable upon unstructured networks. It is inspired by a biological phenomenon called haptotaxis. The algorithm performs at par with dHT-based location search algorithms, however it is much more robust than such structured algorithms. We also present some initial analysis to explain the reason behind the superiority of the algorithm

关键词： Peer to peer computing Internet telephony Protocols Network address translation robustness Algorithm design and analysis Costs Computer science high performance computing Biology computing

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Video query using temporal signature and similarity matching

Video query using temporal signature and similarity matching

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2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012

作者： Lo, Shi-Wei Lin, Fang-Pang National Center for High-performance Computing No. 7 R and D 6th Rd. Hsinchu Science Park Hsinchu City Taiwan Department of Biomedical Engineering and Environmental Sciences National Tsing Hua University No. 101 Section 2 Kuang-Fu Road Hsinchu Taiwan

ISBN: (纸本)9783037856123

Large amount of video data is stored and distributed in wide variety of application. due to the fast video material increases, manage and query of video become more and more important. In this paper, we address a temporal signature representation and similarity model to retrieval the similar video within database by video query. Experimental results on real date are presented. The experimental results show that the statistical approach permits accurate query of video clip, in particular, the performance of the approach was found extremely satisfactory with determine all similar video in database. © (2013) Trans Tech Publications, Switzerland.

关键词： Video recording

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New driving method for triode CNT-FEd 16

New driving method for triode CNT-FED

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16th International Vacuum Microelectronics Conference, IVMC 2003

作者： Lee, Chun-Tao Lan, Yung-Chiang Tsui, Bing-Yue Lee, Cheng-Chung ERSO ITRI Sec. 4 195-4 Chung Hsing Rd. Chutung Hsinchu Taiwan National Center for High-performance Computing Science Park 7 R and D Rd. VI Hsinchu Taiwan Department of Electronics Engineering Institute of Electronics National Chiao-Tung University Hsinchu Taiwan

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Simulation of 3d flow in a fish-bone-type fishway

Simulation of 3D flow in a fish-bone-type fishway

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3rd IASTEd International Conference on Environmental Modelling and Simulation, EMS 2007

作者： Chang, Wen-Yi Lee, Lung-Cheng Lien, Ho-Cheng Lin, Fang-Pang Tsai, Whey-Fong Lai, Jihn-Sung Tan, Yih-Chi National Center for High-Performance Computing No. 7 R and D Rd. VI Hsinchu Science Park Hsinchu 30076 Taiwan Hydrotech Research Institute Department of Bioenvironmental Systems Eng. National Taiwan University Taipei City 106 Taiwan WG-ENV ICID. SG Chinese Taipei Committee

ISBN: (纸本)9780889866829

A 3d two-phase flow numerical model based on the large eddy simulation is developed to deal with the free surface problems by using the surface capturing method. This numerical model is employed for simulations of 3d flow fields in a fish-bone-type fishway. The specific flow patterns induced by fish-bone-type obstructions at the bottom of the channel is illustrated. For assessment of fishway suitability, comparisons of flow fields at different swimming speeds of fishes are made to investigate the potential influences of the flow fields on the migration behaviors of fishes.

关键词： Fishways

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Investigation of Plaque Effects on Cardiovascular Stent System

Investigation of Plaque Effects on Cardiovascular Stent Syst...

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The 4th International Conference on Bioinformatics and Biomedical Engineering(第四届IEEE生物信息与生物医学工程国际会议 iCBBE 2010)

作者： Heng-Chuan Kan Computational Application Division National Center for High-performance Computing No.28 Nan-Ke 3 rd Rd. Hsin-Shi Tainan County 74147 Taiwan R.O.C.

A 3d composite stent model, which consists of thestent, plaque, and artery wall, is generated to characterize stenttransient expansion and deflection behavior using Finite ElementMethod (FEM) approach. Two types (flat and central-thicker) ofplaque models have been employed to evaluate the geometricaleffects of atherosclerotic artery on the cardiovascular stentdeployment system. Simulation results demonstrated that theartery wall sustained a higher value of stress near the distal endof stent for both plaque models. In addition, the dog-boningfactor increased significantly (more than 20-fold) and arteryinjury index was much higher for the central-thicker ***, the effects resulted from the foreshortening,recoil rate and expansion rate were much less profound for bothplaque models. However, the expansion rates for both plaquemodels did not meet the requirement of clinical *** study to include plaque rupture mechanics forovercoming the shortcoming of the current models is currentlyproceeding.

关键词： Cardiology Arteries Stress Injuries Finite element methods Solid modeling Computer applications Character generation Predictive models design automation

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