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Japan-China Joint Workshop on Frontier of computer Science and technology (FCST)

作者： Dan Feng Hanbo Liu Key Laboratory of Data Storage System Ministry of Education School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Huge object-based storage system (HOSS), using objects which possess their own attributes and methods as storage interface, absorbs the advantages of both blocks and files interface. HOSS adopts the interaction among clients, metadata servers and object-based storage device, which has decreased the overload of servers in large measure. After the interactions' flows concerned with I/O operations among the three components described in detail the design and implementation of parallel I/O scheduling is described and discussed. With the buffer, the results show that it enhances the whole system performance efficiently. The performance is better when it's compared with the Lustre system

关键词： Buffer storage computer architecture Processor scheduling computer science Educational technology system performance Protocols Quality of service Laboratories Data storage systems

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A two-way selective encryption algorithm for MPEG video

A two-way selective encryption algorithm for MPEG video

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International Workshop on Networking, Architecture, and Storages (IWNAS)

作者： Liu Jun Zou LingLing Xie Changsheng Huang Hao Key Laboratory of Data Storage System Huazhong University of Science and Technology China School of Computer Science Wuhan Institute of Technology China

The security of multimedia data in digital network is commonly provided by encryption. Nevertheless, most current modern encryption algorithms, which only transform a plaintext message that is the simplest form of multimedia data into unintelligible ciphertext, are not appropriate for higher forms such as images and video with very large file sizes. Selective encryption of MPEG video streams has been proposed to reduce encryption requirements, saving in complexity and facilitating new system functionality. In this paper, a two-way selective encryption algorithm (TWAEA) for MPEG video is proposed to compromise the security and speed in the process of encryption

关键词： Cryptography Streaming media Video compression Image coding Data security Video on demand Information security Multimedia systems High definition video HDTV

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A framework for accessing general object storage

A framework for accessing general object storage

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International Workshop on Networking, Architecture, and Storages (IWNAS)

作者： Qun Liu Dan Feng Qin Ling-jun Zeng Ling-fang Key Laboratory of Data Storage System Ministry of EducationCollege of Computer Huazhong University of Science슠and슠Technology Wuhan China

With computer application popularizing and storage capacity increasing, research for NAS and SAN storage system are gradually turning to OBS. The OBS will become the next wave of network storage technology. In this paper a framework for accessing general object storage (GOS) is presented. The GOS system adopts a basic unit called storage device object (SDO) and proposes an access model that contains upper layer, middle layer and lower layer. It not only enriches the concept of object, but also gives a compatible object interface in the network storage systems. So it allows applications to access to different SDO according their attributes. Therefore it is more universal

关键词： Storage area networks File servers Application software Protocols Network servers Data structures Image storage File systems Laboratories Data storage systems

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A Fast Capacitance Extraction Engine

A Fast Capacitance Extraction Engine

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2006 8th International Conference on Solid-State and Integrated Circuit technology

作者： Shilei Sun Jintao Xue Li Liu Gaofeng Wang Computer School Wuhan University Institute of Microelectronics & Information Technology Wuhan University State Key Laboratory of ASIC & System Fudan University

ISBN: (纸本)1424401607

A fast interconnect capacitance extraction engine is realized and presented *** a fast multipole accelerated Generalized Minimal Residual(GMRES) based three-dimensional(3-D) field solver,this software tool can quickly and accurately extract parasitic capacitances of arbitrary interconnects embedded in piece-wise constant *** engine is also capable of performing fast and accurate capacitance extraction for critical nets in Radio Frequency(RF) applications,IC designs,and MicroElectroMechanical systems(MEMS).The architecture of this extraction engine is *** examples are included to validate the extraction engine and demonstrate the capabilities of this extraction engine.

关键词： GMRES A Fast Capacitance Extraction Engine

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virtual machine-based invasion detection system for the virtual computing environment

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High technology Letters 2006年第4期12卷 379-384页

作者： Zeng, Yu Wang, Jie Sun, Ninghui Li, Jun Nie, Hua Research and Development Center for National Intelligence Computing System Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

Under visualization idea based on large-scale dismantling and sharing, the implementing of network interconnection of calculation components and storage components by loose coupling, which are tightly coupling in traditional server, achieves computing capacity, storage capacity and service capacity distribution according to need in application-level. Under the new server model, the segregation and protection of user space and system space as well as the security monitoring of virtual resources are the important factors of ultimate security guarantee. This article presents a large-scale and expansible distributed invasion detection system of virtual computing environment based on virtual machine. The system supports security monitoring management of global resources and provides uniform view of security attacks under virtual computing environment, thereby protecting the user applications and system security under capacity services domain.

关键词： virtual reality

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A Distributed Workflow Management Approach in CGSP

A Distributed Workflow Management Approach in CGSP

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International Conference on Grid and Cooperative Computing (GCC)

作者： Haifeng Ou Xiaowu Chen Bin Cai Haijun Cao The Key Laboratory of Virtual Reality Technology Ministry of Education School of Computer Science and Engineering Beihang University Beijing China South China University of Technology Guangzhou China Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China

Workflow management technologies play a very important role in constructing grid application environment by automating service composition and execution. With the fast spread of grid technology, workflow management system should be flexible to meet increasing requirements of service composition. This paper introduces a distributed workflow management approach DWM4CGSP named distributed workflow management for CGSP, which can improve capability of workflow execution by dynamically assimilating new workflow engines and balancing workload among these engines. Moreover dynamic load balancing is applied in DWM4CGSP in order to make workload on each engine at reasonable level. Finally an implementation demonstrates that DWM4CGSP works well in CGSP and can be further extended to other similar grids

关键词： Load management Grid computing Energy management Search engines Web services technology management Laboratories Monitoring Engineering management virtual reality

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Locality and Parallelism Optimization for Dynamic Programming Algorithm in Bioinformatics

Locality and Parallelism Optimization for Dynamic Programmin...

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Supercomputing Conference

作者： Guangming Tan Shengzhong Feng Ninghui Sun Graduate School of Chinese Academy of Sciences China Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy and Sciences China

Dynamic programming has been one of the most efficient approaches to sequence analysis and structure prediction in biology. However, their performance is limited due to the drastic increase in both the number of biological data and variety of the computer architectures. With regard to such predicament, this paper creates excellent algorithms aimed at addressing the challenges of improving memory efficiency and network latency tolerance for nonserial polyadic dynamic programming where the dependences are nonuniform. By relaxing the nonuniform dependences, we proposed a new cache oblivious scheme to enhance its performance on memory hierarchy architectures. Moreover we develop and extend a tiling technique to parallelize this nonserial polyadic dynamic programming using an alternate block-cyclic mapping strategy for balancing the computational and memory load, where an analytical parameterized model is formulated to determine the tile volume size that minimizes the total execution time and an algorithmic transformation is used to schedule the tile to overlap communication with computation to further minimize communication overhead on parallel architectures. The numerical experiments were carried out on several high performance computer systems. The new cache-oblivious dynamic programming algorithm achieve 2-10 speedup and the parallel tiling algorithm with communication-computation overlapping shows a desired potential for fine-grained parallel computing on massively parallel computer systems

关键词： Dynamic programming Heuristic algorithms Bioinformatics Concurrent computing Parallel processing computer architecture Tiles Sequences Delay Memory architecture

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Visual Object Recognition in Diverse Scenes with Multiple Instance Learning

Visual Object Recognition in Diverse Scenes with Multiple In...

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2006 IEEE/RSJ International Conference on Intelligent Robots and systems

作者： Dong Wang Bo Zhang Jianwei Zhang Department of Computer Science and Technology State Key Laboratory of Intelligent Technology and System Tsinghua University Beijing China TAMS Department of Informatik University of Hamburg Hamburg Germany

Visual object recognition is important to the robot industry and is a prerequisite for other robot functionalities, such as grasping and manipulation. Object representation and a learning technique are two indispensable parts for this demanding task while arbitrary object appearance and diverse scenes with cluttered background are two great challenges. However, compared with object representation, the learning technique is less developed to deal with these challenges. This paper extends the multiple instance learning (MIL) technique to the multi-class classification scenario and introduces this multi-class MIL framework to the object recognition domain for the first time. This framework is independent of object representation and is useful for object/background discrimination in unseen scenes. Preliminary experiments show that it compares favorably with the supervised learning approach which takes whole images as the classifier training input

关键词： Object recognition Layout Intelligent robots Supervised learning Unsupervised learning Iterative algorithms Service robots Robot sensing systems computer science Intelligent systems

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A Tamper-resistance key Pre-distribution Scheme for Wireless Sensor Networks

A Tamper-resistance Key Pre-distribution Scheme for Wireless...

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International Conference on Grid and Cooperative Computing Workshops (GCCW)

作者： Lei Xie Hongsong Zhu Yongjun Xu Yuefei Zhu Institute of Information Engineering Information and Engineering University Zhengzhou China Advanced Test Technology Laboratory Key Laboratory of Computer System and Architecture Institute of Computing Technology Chinese Academy and Sciences Beijing China

Wireless sensor network (WSN), which is integrated with many technologies such as sensor, embedded computing, wireless communication and distributed information processing etc., is becoming an important branch of ubiquitous computing research. WSN is composed of a large number of distributed sensor nodes, so to ensure the sensor nodes dependable is essential to security of whole network. By introducing a lightweight tamper-resistance design based on security co-processor into sensor nodes, this paper loosens up the security assumptions of WSN, and redefines the objectives of WSN security. Based on such secure infrastructure, the paper also proposes a concise and effective key pre-distribution scheme, in which each node needs to send only one cluster key announcement message and cluster key net can be set up within neighborhood

关键词： Wireless sensor networks Pervasive computing Ubiquitous computing Information security computer networks computer architecture Sensor arrays Design engineering Laboratories Embedded computing

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An Analytical Model for Scheduling Policies in Storage Networks

An Analytical Model for Scheduling Policies in Storage Netwo...

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International Workshop on Networking, Architecture, and Storages (IWNAS)

作者： Diqing Hu Qiang Cao Changsheng Xie Key Laboratory of Data Storage System Chinese Ministry of EducationComputer School Huazhong University of Science슠and슠Technology Wuhan Hubei China

The I/O routine in network storage has longer transferring time and overhead than local I/O. To well make use of the storage network bandwidth and meet demand of concurrent I/O requests, we need to find the appropriate schedule policy for I/O requests at the level of the network. The focus in the paper is on how to schedule concurrent I/O data transferring in share storage network, and to improve performance such as the response time affected by scheduling method. Our objective is to analysis the response time of concurrent requests as function their schedule order such as the sequenced, parallel and hybrid policies. We then verify our results by both the analytical method and experiment

关键词： Analytical models Intelligent networks Delay TCPIP Storage area networks Ethernet networks Linux Sockets Processor scheduling Laboratories

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