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International Conference on Computer and Information technology (CIT)

作者： Yu Su Xiaofei Liao Hai Jin Tim Bell Cluster and Grid Computing Laboratory Services Computing Technology and System Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China Department of Computer Science and Software Engineering College of Engineering University of Canterbury Christchurch New Zealand

Data hiding in computer system is an interesting and important research issue, which brings benefits for secret communication and watermarking. The development of virtual machine brings new potential for data hiding. In this paper we explore the potential for data hiding in virtual machine disk images, and especially hiding schemes that can be used with copy-on-write images. Besides being considered as a way for valid uses such as secret communication and watermarking, these schemes can be a warning against malicious intentions as well. Furthermore, it lays the foundation for a more thorough analysis of the whole virtual machine system for data hiding.

关键词： File systems Detectors Writing Virtual machining Linux Fats Virtual environment

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Real-Time Activity Recognition in Wireless Body Sensor Networks: From Simple Gestures to Complex Activities

Real-Time Activity Recognition in Wireless Body Sensor Netwo...

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IEEE International Conference on Embedded and Real-Time computing systems and Applications (RTCSA)

作者： Liang Wang Tao Gu Hanhua Chen Xianping Tao Jian Lu State Key Laboratory of Novel Software Technology Nanjing University China Department of Mathematics and Computer Science University of Southern Denmark Denmark Services Computing Technology and System Laboratory Huazhong University of Science and Technology China

Real-time activity recognition using body sensor networks is an important and challenging task and it has many potential applications. In this paper, we propose a real time, hierarchical model to recognize both simple gestures and complex activities using a wireless body sensor network. In this model, we first use a fast, lightweight template matching algorithm to detect gestures at the sensor node level, and then use a discriminative pattern based real-time algorithm to recognize high-level activities at the portable device level. We evaluate our algorithms over a real-world dataset. The results show that the proposed system not only achieves good performance (an average precision of 94.9%, an average recall of 82.5%, and an average real-time delay of 5.7 seconds), but also significantly reduces the network communication cost by 60.2%.

关键词： Real time systems Body sensor networks Acceleration Wireless communication Algorithm design and analysis Gesture recognition

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Multi-granularity grid resource reservation technology

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Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and technology (Natural Science Edition) 2010年第SUPPL. 1期38卷 68-72页

作者： Xie, Bo Wu, Song Shi, Xuanhua Xiao, Kang College of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Services Computing Technology and System Laboratory of the Ministry of Education Huazhong University of Science and Technology Wuhan 430074 China

We develop a system managing resource reservation for grid applications. The system provides different granularity of resource reservation to meet the resource requirements for different applications. In order to adapt to the dynamic resource requirement of grid applications, the system allows for dynamic adjustment of the reservation duration or resources at runtime. The test shows that Linpack result with maximum interference programs is only 0.39% of that without interference. However, the result with maximums interference program under resource reservation is 103.38% of that without interference.

关键词： Grid computing

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ImageFlow: Workflow Based Image Processing with Legacy Program in Grid

ImageFlow: Workflow Based Image Processing with Legacy Progr...

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International Seminar on Future Information technology and Management Engineering, FITME

作者： Haijun Cao Hai Jin Song Wu Shadi Ibrahim Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory Huazhong University of Science and Technology Wuhan China

As image processing has been widely used in many scientific research areas, how to find a powerful and inexpensive approach to solve large-scale image processing problems poses great challenges. In this paper, based on workflow theory and Web service technology, we present a novel image processing framework called ImageFlow, which enables images to be processed by distributed legacy software coupled with interconnected target systems. The salient features of ImageFlow are: (1) Workflow based image processing; (2) General running service (GRS) for legacy programs; (3) Adaptive data transfer mechanism with SOAP attachment and GridFTP; and (4) Workflow based software deployment. The experimental results show that our approaches are feasible and efficient. SOAP attachment over HTTP is more preferable for transferring small size of data, while GridFTP performs better when transferring large-scale data. In addition, compared with the sequential deployment model, workflow based software deployment can gain higher speedup when constructing large-scale systems.

关键词： Image processing Web services Containers Large-scale systems Simple object access protocol Image storage Engines Job design Grid computing Application software

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2009 IEEE International Conference on Information and Automation(2009年 IEEE信息与自动化国际学术会议)

作者： Zehua Lv Hai Jin Pingpeng Yuan Services Computing Technology and System Laboratory Cluster and Grid Computing laboratoryHuazhong University of Science and TechnologyWuhan430074China

Interval Type-2 Fuzzy Sets (IT2 FSs) has been used in wide range of applications, such as decision making, pattern recognitions. However, there is little investigation on the clustering techniques of IT2 FSs, since it is very important for measuring the degree of similarity between interval type-2 fuzzy sets in clustering research. In this paper, we give a novel method to represent interval type-2 fuzzy sets by a series of linear functions. This method is named as triangular representation because the curves of the functions and the coordinates shape into triangles. A new kind of similarity between interval type-2 fuzzy sets based on triangle is given and the validity of this method is proven. Furthermore, several numerical examples are given to show that the proposed similarity measure is reasonable and better than any existing methods.

关键词： Fuzzy sets Frequency selective surfaces Laboratories Pattern recognition Uncertainty Computers Grid computing Electronic mail Decision making Automation

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VRFPS: A Novel Virtual Machine-Based Real-time File Protection system

VRFPS: A Novel Virtual Machine-Based Real-time File Protecti...

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International Conference on Software Engineering Research, Management and Applications (SERA)

作者： Feng Zhao Yali Jiang Guofu Xiang Hai Jin Wenbin Jiang Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

With the development of virtualization technology, file protection in virtual machine, especially in guest OS, becomes more and more important. Traditional host-based file protection system resides the critical modules in monitored system, which is easily explored and destroyed by malwares. Moreover, in order to protect the multiple operation systems running on the same platform, it is necessary to install independent file protection system for each of them, which greatly wastes computing resources and brings serious performance overhead. In this paper, a novel VM-based real-time file protection system, named VRFPS, is proposed to solve these problems. First, virtual machine monitor introspects all file operations of guest OS. Then, semantic gap between disk block and logic files is narrowed by blktap. Finally, a virtual sandbox is implemented in privileged domain to prevent protected files in guest domain from modifying illegally. Our approach is highly isolated, transparent and without modification on virtual machine monitor and guest OS. The experimental results show that the presented system is validate and of low performance overhead.

关键词： Real time systems Protection Virtual machining Kernel Operating systems Virtual machine monitors Application virtualization Data security Access control Software engineering

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Yarqs: Yet Another Range Queries Schema in DHT Based P2P Network

Yarqs: Yet Another Range Queries Schema in DHT Based P2P Net...

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International Conference on Computer and Information technology (CIT)

作者： Hao Zhang Hai Jin Qin Zhang Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Range query in DHT based P2P network is a hot topic in recent researches. The hashing function in DHT protocols makes the data hard to keep their original order relationship. Hence range queries for such networks become difficult. This paper presents the design of Yarqs-a new schema to achieve range queries in DHT based P2P networks. By using the inherent characteristics of DHT based networks, Yarqs catches the data pass the nodes and organizes them as a cache network. The range queries are deployed over the cache network. Yarqs does not change the design of the DHT overlay and builds the architecture for range queries by using the historical DHT queries data. Yarqs supports inherent load balancing. We also study the performance of Yarqs in evaluation section. The experiments to check the influences of different parameters of Yarqs are deployed and analyzed.

关键词： Load management Peer to peer computing Data structures Protocols Grid computing Computer networks Information technology Computer science Dictionaries Costs

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Optimize Performance of Virtual Machine Checkpointing via Memory Exclusion

Optimize Performance of Virtual Machine Checkpointing via Me...

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ChinaGrid Annual Conference (ChinaGrid)

作者： Haikun Liu Hai Jin Xiaofei Liao Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Virtual machine (VM) level checkpoints bring several advantages which process-level checkpoint implementation can hardly provide: compatibility, transparence, flexibility, and simplicity. However, the size of VM-level checkpoint may be very large and even in the order of gigabytes. This disadvantage causes the VM checkpointing and restart time become very long. To reduce the size of VM checkpoint, this paper proposes a memory exclusion scheme using ballooning mechanism, which omits saving unnecessary free pages in the VM. We implement our prototype in Xen environment. Experimental measurements show our approach can significantly reduce the size of VM checkpoint with minimal runtime overhead, thereby greatly improve the checkpoint performance.

关键词： Virtual machining Checkpointing Virtual manufacturing Virtual machine monitors Hardware Operating systems Containers Encapsulation Fault tolerant systems Availability

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VDE: Seamless Mobility on Desktop Environment

VDE: Seamless Mobility on Desktop Environment

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IEEE International Symposium on Dependable, Autonomic and Secure computing (DASC)

作者： Xiaofei Liao Xianwen Chen Hai Jin Zongfen Han Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Virtual desktop environment (VDE) provides a real virtual working environment in which users could personally customize and update the application list from application template libraries. The heterogeneous applications actually running in the remote application servers could cooperatively communicate with each other. It is a thin client approach to mobility in which the perfect combination of VM technology and DFS technology are the keys to the rapid seamless resuming of the usage scenarios. Usage scenarios are incrementally suspended including the user's documents and the running applications. The usage data stored in data center provides a unified view for the users through historical scenario manager and ensures the data's security and reliability at the same time. This paper explores the building policy of a real virtual working environment and the suspending/resuming policy of usage scenarios. Experiments demonstrate and evaluate VDE's efficiency and effectiveness.

关键词： Application software Layout Displays Virtual machining Resumes Grid computing Linux Switches Image storage Computers

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Fast Isosurface Extraction for Medical Volume Dataset on Cell BE

Fast Isosurface Extraction for Medical Volume Dataset on Cel...

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International Conference on Parallel Processing (ICPP)

作者： Hai Jin Bo Li Ran Zheng Qin Zhang Services Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

The size of volumetric data generated by medical imaging and scientific simulations is increased significantly due to the dramatic advances in medical imaging modalities and computing technologies. The volumetric data generally need to be visualized and marching cubes algorithm (MC for short) is one of the standard methods of the isosurface extraction for the medical applications. However, MC algorithm requires a large amount of data computing power. The cell broadband engine (Cell for short) processor, which is a typical COTS (commodity off-the-shelf) heterogeneous designed to handle extremely demanding computations, can be used to hasten isosurface extraction in medial application. In this paper, we present a streaming model-based scheme to efficiently map MC algorithm to Cell. Specifically, a block-based filter running on PPE is imposed as a preprocessing stage to avoid unnecessary data transfer and computation, and the MC kernel runs on SPEs as the subsequent stage. Through tuning the size of the block, the workload of PPE and SPE is orchestrated harmoniously. The experimental results demonstrate that overall isosurface extraction speedup of more than 10 times is achieved compared with conventional heavy iron CPUs.

关键词： Isosurfaces Data mining Biomedical imaging Computational modeling Medical simulation Computers Data visualization Medical services Biomedical equipment Engines

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