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IEEE International Conference on Networking, architecture and Storage

作者： Cai, Songsong Yang, Yongqiang Lin, Chuanwen Liu, Qi Key Laboratory of Computer System and Architecture Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China Graduate University of Chinese Academy of Sciences Beijing China Dept. of Computer Science and Technology University of Science and Technology of China Hefei China Loongson Technology Corporation Limited Beijing China

ISBN: (纸本)9780769545097

In Java programs, it needs to use the information of the method type to resolve the virtual method dynamically, which restricts the performance greatly. Currently, the solution is mainly the technique of inline caching, which can be divided into two categories: monomorphic inline caching and polymorphic inline caching. Because of the simple implementation of monomorphic inline caching, it is more commonly used, but it cannot resolve the problem of frequently seeing different types of objects at one call site. Although polymorphic inline caching can solve this problem, it is costly. This paper presents the CAM hardware table, proposes a virtual method invoking mechanism based on software and hardware co-design. It solves the problem of frequently seeing different types of objects at one call site, and does not introduce additional overhead. The experimental evaluation shows that it improves the cached hit rate from 13.3% to 76.4% and improves 16.2% performance of the virtual test;it improves the performance of SPECjvm98 by 6.4% on average. © 2011 IEEE.

关键词： Virtual reality

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High-Performance Reverse Time Migration on GPU

High-Performance Reverse Time Migration on GPU

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computer Science Society (SCCC) International Conference Chilean FLAGGED

作者： Javier Cabezas Mauricio Araya-Polo Isaac Gelado Nacho Navarro Enric Morancho José M. Cela Computer Sciences - Programming Models Barcelona Supercomputing Center (BSC) Barcelona Spain Computer Applications in Science and Engineering dept. Barcelona Supercomputing Center (BSC) Barcelona Spain Department of Computer Architecture Universitat Politècnica de Catalunya Spain Computer Applications in Science and Engineering Department Barcelona Supercomputing Center Barcelona Spain

Partial Differential Equations (PDE) are the heart of most simulations in many scientific fields, from Fluid Mechanics to Astrophysics. One the most popular mathematical schemes to solve a PDE is Finite Difference (FD). In this work we map a PDE-FD algorithm called Reverse Time Migration to a GPU using CUDA. This seismic imaging (Geophysics) algorithm is widely used in the oil industry. GPUs are natural contenders in the aftermath of the clock race, in particular for High-performance Computing (HPC). Due to GPU characteristics, the parallelism paradigm shifts from the classical threads plus SIMD to Single Program Multiple Data (SPMD). The NVIDIA GTX 280 implementation outperforms homogeneous CPUs up to 9x (Intel Harpertown E5420) and up to 14x (IBM PPC 970). These preliminary results confirm that GPUs are a real option for HPC, from performance to programmability.

关键词： Finite difference methods Geophysics computing computer architecture Parallel processing Graphics processing unit Clocks Hardware Algorithm design and analysis

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1-D Spatial Attention in Binarized Convolutional Neural Networks

1-D Spatial Attention in Binarized Convolutional Neural Netw...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： HyunJin Kim Jungwoo Shin Wansoo Kim Alberto A. Del Barrio School of EEE Dankook University Republic of Korea VOOM AI LAB LINE Plus Corporation Dept. of Computer Architecture and System Eng. Complutense University of Madrid Madrid ES

This paper proposes a structure called SPBNet for enhancing binarized convolutional neural networks (BCNNs) using a low-cost 1-D spatial attention structure. Attention blocks can compensate for the performance drop in BCNNs. However, the hardware overhead of complex attention blocks can be a significant burden in BCNNs. The proposed attention block consists of low-cost 1-D height-wise and width-wise 1-D convolutions, It has the attention bias to adjust the effects of attended features in ×0.5−×1.5. In experiments, the proposed block used in ResNet18-based BCNNs improves Top-1 accuracy up to 2.7% over a baseline ReActNet on the CIFAR100 dataset. Notably, without using teacher-student training, the proposed structure can show comparable performance as the baseline ReActNetA using teacher-student training.

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Dynamic property evaluations of full-scale 4-story steel frame using parallel FE-analysis

Dynamic property evaluations of full-scale 4-story steel fra...

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9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium

作者： Kohiyama, M. Ohsaki, M. Miyamura, T. Onda, K. Isobe, D. Akiba, H. Hori, M. Kajiwara, K. Ine, T. Dept. of System Design Eng. Keio University Yokohama 223-8522 Japan Dept. of Architecture and Architectural Eng. Kyoto University Kyoto 615-8540 Japan Dept. of Computer Science College of Eng. Nihon University Koriyama 963-8642 Japan Allied Engineering Corporation Minato-ku Tokyo 105-0014 Japan Graduate School of Systems and Information Eng. University of Tsukuba Tsukuba 305-8573 Japan Earthquake Research Institute University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Hyogo Earthquake Engineering Research Center National Research Institute for Earth Science and Disaster Prevention Miki 673-0515 Japan

ISBN: (纸本)9781617388446

The project of E-Simulator is under way at Hyogo Earthquake Engineering Research Center (E-Defense) of National Research Institute of Earth Science and Disaster Prevention (NIED), Japan, which facilitates the world's largest shaking table. The E-Simulator uses the parallel finite element (FE) analysis software package called ADVENTYRECluster (ADVC) as a platform. In this study, we report the results of high-precision FE-analysis for simulation of collapse behavior of the 4-story steel building frame that is the specimen of the full-scale total collapse shaking-table test conducted in September 2007 at E-Defense. It is shown that elastoplastic dynamic responses can be estimated with good accuracy using a high-precision FE-analysis without resort to macro models such as plastic hinge and composite beam effect.

关键词： Finite element method

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Supporting coordination in surgical suites: Physical aspects of common information spaces 10

Supporting coordination in surgical suites: Physical aspects...

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28th Annual CHI Conference on Human Factors in Computing systems, CHI 2010

作者： Scupelli, Peter G. Xiao, Yan Fussell, Susan R. Kiesler, Sara Gross, Mark D. Human-Computer Interaction Inst. Carnegie Mellon University Pittsburgh PA 15213 United States Patient Safety Research Baylor Health Care System 8080 N. Central Expy. Ste. 500 Dallas TX 75206 United States Dept. of Communication Cornell University Ithaca NY 14853 United States School of Architecture Carnegie Mellon University Pittsburgh PA 15213 United States

ISBN: (纸本)9781605589299

To accommodate frequent emergencies, interruptions, and delays, hospital staff continually make and coordinate changes to the surgery schedule. The technical and social aspects of coordination in surgical suites have been described by prior studies. This paper addresses an understudied aspect of coordination: the physical environment. Based on a field study of four surgical suites in two large academic centers, we show how the physical layout of hallways and rooms, and barriers and spaces around displays and key coordinators, support or fail to support the common information spaces used for coordination. We use the concept "information hotspots" to represent how physical places and their characteristics facilitate coordination. We developed design principles based on the concept of information hotspots that should guide architectural considerations for coordination in dynamic environments such as hospitals. © 2010 ACM.

关键词： Hospitals

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High-precision fe-analysis for seismic collapse simulation of steel building frames

High-precision fe-analysis for seismic collapse simulation o...

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3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2011

作者： Yamashita, T. Miyamura, T. Ohsaki, M. Kohiyama, M. Isobe, D. Onda, K. Hori, M. Zhang, J.Y. Akiba, H. Kajiwara, K. Hyogo Earthquake Eng. Research Center National Research Inst. for Earth Science and Disaster Prevention 1501-21 Nishikameya Mitsuda Shijimi Miki 673-0515 Japan Dept. of Computer Science College of Eng. Nihon University 1 Nakagawara Tokusada Tamura Koriyama 963-8642 Japan Dept. of Architecture Graduate School of Eng. Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima 739-8527 Japan Dept. of System Design Eng. Keio University 3-14-1 Hiyoshi Kohoku Yokohama 223-8522 Japan Dept. of Engineering Mechanics and Energy University of Tsukuba 1-1-1 Tennodai Tsukuba 305-8573 Japan Allied Engineering Corporation Toyosu Front 9F 3-2-20 Toyosu Koto Tokyo 135-0061 Japan Earthquake Research Institute University of Tokyo 1-1-1 Yayoi Bunkyo Tokyo 113-0032 Japan Dept. of Architecture and Urban Design Ritsumeikan University 1-1-1 Noji-higashi Kusatsu 525-8577 Japan

The project of E-Simulator is under way at Hyogo Earthquake Engineering Research Center (E-Defense), which belongs to National Research Institute for Earth Science and Disaster Prevention (NIED), Japan. E-Defense facilitates the world's largest shaking table. The E-Simulator uses the parallel EF-analysis software package called ADVENTURECluster (ADVC) as a platform, and we carried out elastoplastic seismic response analysis of high-rise building frame with over 70-million DOFs. In this study, we report the results of high-precision FE-analysis for simulation of dynamic collapse behavior of the 4-story steel building frame. The whole frame is discretized into hexahedral elements with linear interpolation functions. In order to improve the accuracy of collapse simulation, a new piecewise linear combined isotropic and kinematic hardening rule is implemented for steel material, and its parameters are identified from the uniaxial material test result. The stud bolts are precisely modeled using multipoint constraints and nonlinear springs. The wire-meshes in the concrete slab are modeled using hexahedral elements. The damping due to plastic energy dissipation of exterior walls is modeled by shear springs between the floors. The accuracy of the model is verified in comparison to the physical test of steel-concrete composite beam subjected to static deformation. It will be shown that elastoplastic dynamic responses of the 4-story frame can be estimated with good accuracy using a high-precision FE-analysis without resort to macro-models such as plastic hinge and composite beam effect.

关键词： Finite element method

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Bidirectionalizing programs with duplication through complementary function derivation

Computer Software

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computer Software 2009年第2期26卷 56-75页

作者： Matsuda, Kazutaka Hu, Zhenjiang Nakano, Keisuke Hamana, Makoto Takeichi, Masato DC Graduate School of Information Science and Technology University of Tokyo Japan Society for the Promotion of Science Japan Information System Architecture Research Division National Institute of Informatics Japan University of Electro-Communications Japan Dept. of Computer Science Gunma University Japan Graduate School of Information Science and Technology University of Tokyo Japan

A bidirectional transformation consists of a pair of unidirectional transformations: a forward transformation that maps one data structure called source to another called view, and a backward transformation that reflects changes in the view to the source. Bidirectional transformation has many useful applications such as replicated data synchronization, presentation-oriented editor development, and software artifact synchronization. In a previous work, we proposed a framework in which a backward transformation is automatically generated from a forward transformation by derivation of a complementary function if the forward transformation is given by a program in a simple functional language. However, the language has a severe restriction that no variable is allowed to be used more than once. In this paper, we show that tupling transformation relaxes this restriction, allowing us to handle a wider class of bidirectional transformations that may contain duplications.

关键词： Functions

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A Secure Web Services Model Based on the Combination of SOAP Registration Info and Token Proxy

A Secure Web Services Model Based on the Combination of SOAP...

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International Symposium on computer Science and Computational Technology, ISCSCT

作者： Youxiang Duan Yongtang Bao Lijiang Pan Beibei Yan Jiuyun Xun Nianyun Shi Department of Computer and Communication Engineering China University of Petroleum Dongying China Dept of Computer and Communication Engineering China University of Petroleum (East China) Dongying China Department of Marketing Management The institute of Architecture Designing of Dongying Dongying China Finance Bureau Information Center of Dongying China University of Petroleum (East China) Dongying China Finance Bureau Information Center of Dongying China University of Petroleum Dongying China Dept. of Marketing Management institute of Architecture Designing of Dongying Dongying China Institute Network Information and System China University of Petroleum (East China) Dongying China Institute Network Information and System China University of Petroleum Dongying China

Along with the thorough development and application for Web services, the security of it has taken people¿s attention more and more. While Web services security (WSS) can exchange safe SOAP message and enhance the security of Web services, it will also have certain influence to the performance of Web services. In order to satisfy the security of it , to reduce the performance influence of Web services and to solve both the requester and provider side cannot recognize the security token, in this paper, we aim at proposing a SOAP information registration and security token proxy model for Web services (SIRSTPM). We has carried on the formalizing and verifying of this model. The result of theoretical verification shows this model is secure and effective. This model is helpful for solving the problem between security and performance contradiction as well as the token cannot be recognized by both the requester and the provider.

关键词： Web services Simple object access protocol Information security Petroleum computer networks Service oriented architecture Communication system security computer science Design engineering Finance

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