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16th International Vacuum Microelectronics Conference, IVMC 2003

作者： Lin, Ming-Chieh Chung, Hao-Ming Chuu, der-San NanoScience Research Team Department of R and D National Center for High-Performance Computing Science-Based Industrial Park 7 R and D RD. VI Hsinchu Taiwan Department of Electrophysics National Chiao Tung University Hsinchu Taiwan

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Maximum local scour depth at bridge piers under unsteady flow

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Journal of Hydraulic Engineering 2009年第7期135卷 609-614页

作者： Lai, Jihn-Sung Chang, Wen-Yi Yen, Chin-Lien 158 Chow Shan Road Taipei 106 Taiwan National Center for High-Performance Computing No. 7 R and D 6th Rd. Hsinchu Taiwan Department of Civil Engineering Hydrotech Research Institute NTU 158 Chow Shan Road Taipei 106 Taiwan

The temporal effect of hydrograph on local scour depth is investigated under clear-water scour condition. By analyzing the characteristics of scour-depth evolutions at bridge piers for different rising hydrographs, a relation for estimating the maximum scour depth in uniform sediment is proposed. In the relation, the flow unsteadiness effect is taken into account by an unsteady flow parameter combining the peak-flow intensity and time-to-peak factors. For nonuniform sediment with d84 employed as the effective sediment size, this relation can yield reasonably good results of the maximum scour depth under rising hydrograph. © 2009 ASCE.

关键词： Scour

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Quasistationary States of an Electron in Open Quantum dots 5

Quasistationary States of an Electron in Open Quantum Dots

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5th Pacific rim Conference on Lasers and Electro-Optics, CLEO/Pacific rim 2003

作者： Lin, Ming-Chieh Chuu, der-San NanoScience Research Team Department of R&D National Center for High-Performance Computing 7 R&D Rd. VI Science-Based Industrial Park Hsinchu300 Taiwan Department of Electrophysics National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)0780377664

The quasistationary states of an electron in a spherically N-layered open quantum dot are investigated. A novel complex eigen-solver is presented to determine both the resonance positions Er and the corresponding lifetimes τ of the system. In this eigen-solver, the wave functions are expressed in terms of the Whittaker functions with complex arguments, and the effective-mass Schrödinger equation is solved analytically. The quasistationary states in terms of the complex eigen-energies, Ek-ih/(2π), are extracted numerically in the complex plane by Newton's method. All the quasistationary states of the system can be determined via this eigen-solver. For illustration, the numerical calculations are carried out for the HgS/CdS/HgS multi-layered quantum dot. Both the energy levels and the lifetimes of the quasistationary states are found as functions of the geometric parameters of the system. The lifetime of an electron in such a system is very sensitive to the geometric characteristics. © 2003 IEEE.

关键词： Mercury compounds

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The Chinese speech emotion interaction and recognition on internet

The Chinese speech emotion interaction and recognition on in...

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11th IASTEd International Conference on Internet and Multimedia Systems and applications, IMSA 2007

作者： Chen, Kuen-Meau Wang, Ming-Jen Niu, Hsueh-Wen Chiang, Ku-Ching National Center for High-Performance Computing Hsinchu Science Park No.7 R and D Rd. VI Hsinchu 30076 Taiwan National Tsing Hua University 101 Kuang-Fu Road Hsinchu 30076 Taiwan

ISBN: (纸本)9780889866782

In this paper, we attempt to establish a communication environment of emotions and select six emotions-joy, surprise, anger, sadness, fear and neutral. With the speech recognition, the researcher analyzes the changes and reactions of emotions in speeches and applies them in the online games or Internet digital speech communication while establishing the system structure of real time transmission speech emotions. As emotions differ in each person, the researcher does not select the regular single person speech materials that do not offer sufficient recognition. Instead, the researcher adopts multi-person speech as training materials and locates the feature combination with the highest recognition rate and recognition rates of different emotions.

关键词： Speech communication

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Three-dimensional simulation of the femto-second pulsed laser interacting with a nitrogen molecule

Three-dimensional simulation of the femto-second pulsed lase...

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作者： Lee, Y.-M. Jiang, T.-F. Su, Z.-Y. Wu, J.-S. Computational Application Division National Center for High-Performance Computing 7 R and D Road VI Hsinchu 30076 Taiwan Institute of Physics National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu 30010 Taiwan Department of Mechanical Engineering National Chiao Tung University 1001 Ta-Hsueh Road Hsinchu 30010 Taiwan

Interaction of femto-second pulsed laser with a nitrogen molecule at various angles is investigated numerically in the present study. We propose a three-dimensional time-dependent Schrödinger equation (TdSE) solver using finite volume method (FVM) with single-active-electron (SAE) assumption. We construct the model potential by combining the soft-Coulomb potential and Yukawa potential and fitting both the first ionization energy and orbital type of highest-occupied molecular orbital (HOMO) of a N2 molecule. The ratio of simulated maximum (χ=0°) to minimum (χ=90°) ionization yield is 1.9 and it agrees more favorably with the converted experimental data (2.3-3.3) than the MO-AdK model does (10.0). This shows that the proposed model potential in the 3d TdSE solver can faithfully predict the ionization of a nitrogen molecule under strong pulsed laser incidence and is a very useful tool for future application in similar analysis of more complicated molecules. © 2010 Elsevier B.V. All rights reserved.

关键词： Pulsed lasers

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A power-aware cloud architecture with smart metering

A power-aware cloud architecture with smart metering

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International Workshop on Scheduling and resource Management for Parallel and distributed Systems

作者： Tu, Che-Yuan Kuo, Wen-Chieh Teng, Wei-Hua Wang, Yao-Tsung Shiau, Steven National Center for High-Performance Computing No. 7 R and D Rd. Hsinchu Taiwan Engineering Science Dept. National Cheng Kung University No.1 University Road Tainan City 701 Taiwan

ISBN: (纸本)9780769541570

With the growing interest of cloud computing and carbon emission reduction, how to build energy efficient cloud architecture becomes a crisis issue for service providers. In this paper, we propose a power-aware cloud architecture based on drBL (diskless remote Boot in Linux), cpufreqd and xenpm. We also introduce a low-cost smart metering system based on open hardware Arduino board. Composing with existing technique, such as dynamic Voltage Frequency Scaling (dVFS), ACPI, diskless design and rAM disk storage, our experiment results show that this architecture will reduce energy consumption from 4 to 11% when running CPUintensive applications. In conclusion, this paper reveals that service providers could benefit from diskless design and rAM disk storage if their applications are CPU-intensive. © 2010 IEEE.

关键词： Cloud computing architecture

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Violations of the v-representability condition underlying Kohn-Sham density-functional theory

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Physical review A 2024年第2期110卷 L020802-L020802页

作者： Egor Trushin Jannis Erhard Andreas Görling Lehrstuhl für Theoretische Chemie Erlangen National High Performance Computing Center (NHR@FAU) Martensstraße 1 D-91058 Erlangen Germany

Electronic structure methods based on the Kohn-Sham (KS) formalism of density-functional theory are ubiquitously and highly successfully used in physics, chemistry, and materials science. Whether the KS formalism is universally applicable is, however, an open question because it is not known whether a KS model system exists for all physical electron systems. This is the question of whether electron densities of real physical systems are always noninteracting v-representable. Here we give indications that this is not always the case. To that end, we calculated highly accurate electron densities of first and second row atoms with a partially filled p shell by high-level quantum chemistry methods and by full configuration interaction and then tried to determine the effective KS potential by KS inversion. Except for nitrogen and phosphorus this was only possible for an occupation pattern violating the Aufbau principle. This means that the resulting wave function is not a ground state of the KS Hamiltonian operator and therefore not a valid KS wave function, which indicates that the KS formalism is not always applicable. Strategies to avoid the presented v-representability problem are discussed.

关键词： density functional theory First-principles calculations Quantum chemistry methods

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discussion of "Flow intensity parameter in pier scour experiments" by Gonzalo Simarro, Luis Teixeira, and António H. Cardoso

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Journal of Hydraulic Engineering 2009年第2期135卷 154-155页

作者： Lai, Jihn-Sung Chang, Wen-Yi Yen, Chin-Lien Hydrotech Research Institute Dept. of Bioenvironmental Systems Engineering National Taiwan Univ. 158 Chow Shan Rd. Taipei 106 Taiwan National Center for High-Performance Computing No. 7 R and D 6th Rd. Science Park Hsinchu Taiwan

The article presents a perspective about the paper entitled 'Flow Intensity Parameter in Pier Scour Experiments,' by Gonzalo Simarro, Luis Teixeira and António H. Cardoso. The author states that the issue is attributable to flow depth effect, which should be taken into account to improve the correlation in all series. He implies that under clear-water scour condition in uniform sediment with steady flow, the equilibrium scour depth is related to the flow depth, sediment size and flow intensity.

关键词： ArTICLES (Published materials) SPECTrUM analysis SCOUrS PArAMETEr estimation COrrELATION (Statistics) EQUILIBrIUM

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research on the multidimensional educational review strategy Based on MOOCs Integrated by the multidimensional learning theory

Research on the multidimensional educational review strategy...

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2015 World Congress on Engineering and Computer Science, WCECS 2015

作者： Ming, Li Ju, Zhang Jingzhong, Zhang Lian, Chen High Performance Computing Application R and D Center Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Automated Reasoning and Cognition Key Laboratory of Chongqing Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing China Laboratory for Automated Reasoning and Programming Chengdu Institute of Computer Applications Chinese Academy of Sciences Chengdu China

ISBN: (纸本)9789881925367

Through a detailed analysis of the theoretical basis for MOOCs in terms of educational learning theories, this paper attempts at finding the corresponding relationship between the theories and MOOCs, which not only theoretically explains the reasons why MOOCs exceed all the previous education models, but also empirically proves it with voluminous facts and data. The author conducts this research in the hope of enlightening the online education platform of other types. Besides, this paper provides the model framework and strategy to multidimensional educational review based on MOOCs. The model and strategy are applicable not only to MOOCs, the large-scale online education, but also to various online education platforms.

关键词： E-learning

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Moldable job scheduling for HPC as a service

Moldable job scheduling for HPC as a service

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8th FTrA International Conference on Future Information Technology, FutureTech 2013

作者： Huang, Kuo-Chan Huang, Tse-Chi Tsai, Mu-Jung Chang, Hsi-Ya Department of Computer Science National Taichung University of Education No. 140 Min-Shen Road Taichung Taiwan National Center for High-Performance Computing Hsinchu Science Park No. 7 R and D 6th Rd. Hsinchu Taiwan

ISBN: (纸本)9783642408601

As cloud computing emerges and gains acceptance, more and more software applications of various domains are transforming into the SaaS model. recently, the concept of HPC as a Service (HPCaaS) was proposed to bring the traditional high performance computing field into the era of cloud computing. One of its goals aims to allow users to get easier access to HPC facilities and applications. This paper deals with related job submission and scheduling issues to achieve such goal. Traditional HPC users in supercomputing centers are required to specify the amount of processors to use upon job submission. However, we think this requirement might not be necessary for HPCaaS users since most modern parallel jobs are moldable and they usually could not know how to choose an appropriate amount of processors to allow their jobs to finish earlier. Therefore, we propose a moldable job scheduling approach which relieves HPC users' burden of selecting an appropriate number of processors and can achieve even better system performance than existing job scheduling methods. The experimental results indicate that our approach can achieve up to 75% performance improvement than the traditional rigid processor allocation method and 3% improvement than previous moldable job scheduling methods. © 2014 Springer-Verlag.

关键词： Cloud computing

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