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Image segmentation for silicosis diagnosis in grid environment 09

Image segmentation for silicosis diagnosis in grid environme...

引用

1st International Conference on Internet Multimedia computing and Service, ICIMCS 2009

作者： Zheng, Ran Jin, Hai Zhang, Qin Zhang, Liang Cluster and Grid Computing Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781605588407

Silicosis is one of the most serious occupational diseases in China. Radiologist information comes from chest radiographs, in which the most important parts are lung fields and ribs. It is necessary to distinguish lung fields and ribs from other organs. The anatomical knowledge-based lung segmentation can improve the accuracy of segmentation and solve the problems of opened region and lost clavicle region. The curve model-based rib segmentation can acquire more accurate rib location information, and provide more efficient orientation for latter diagnosis. These two methods are also deployed in grid environment to get higher efficiency when processing massive and distributed medical data for silicosis diagnosis. Experiments show that the two proposed algorithms can meet the latter medical requirements for chest radiograph with higher accuracy. Copyright 2009 ACM.

关键词： computer aided diagnosis

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Building dynamic integrity protection for multiple independent authorities in virtualization-based infrastructure

Building dynamic integrity protection for multiple independe...

引用

2009 10th IEEE/ACM International Conference on grid computing, grid 2009

作者： Cheng, Ge Jin, Hai Zou, Deqing Zhang, Xinwen Li, Min Yu, Chen Xiang, Guofu Cluster and Grid Computing Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Samsung Information Systems America San Jose CA United States

ISBN: (纸本)9781424451494

In grid and cloud computing infrastructures, the integrity of a computing platform is a critical security requirement in order to provide secure and honest computing environments to service providers and resource consumers. However, due to the fact that software components running on a single platform are usually provided and maintained by different authorities which are potentially untrusted to each other, the problem to monitor and protect runtime system integrity become very challenging and has not been well addressed yet. In this paper, we present a virtualization based dynamic integrity protection method which ensures that only appropriate authorities can control over their components without interfering with other component providers or authorities. In our solution, integrity requirements defined by the authorities of upper components (e.g., service middleware and applications) are respected by preventing the underlying components (e.g., operating system) from exposing their sensitive data, which can be caused by update of the underlying components or other malicious actions. We implement our solution on Xen-based platform, and our evaluation results show that the solution is effective for integrity protection with acceptable performance overhead. © 2009 IEEE.

关键词： Virtualization

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PMonitor: A Lightweight Performance Monitor for Virtual Machines

PMonitor: A Lightweight Performance Monitor for Virtual Mach...

引用

International Workshop on Education technology and computer science, ETCS

作者： Zhiyuan Shao Hai Jin Xiaowen Lu 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

Performance monitor for virtual machines can monitor the performance metrics of virtual machines and gain the resource consumption status, and thus provide reliable basis for system performance evaluation and further management. However, at current stage, such performance monitor systems for the virtualized systems are inadequate and inefficient. In this paper, we propose a lightweight performance monitor system model for virtual machines, called PMonitor. Through prototype implementation and experiments, we find that PMonitor consumes very few processing power, which is much lower than other open source performance monitors running on the virtualized environments.

关键词： Condition monitoring Virtual machine monitors Virtual machining Measurement Performance gain System performance Resource management Power system management Power system modeling Virtual prototyping

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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...

引用

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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Live virtual machine migration with adaptive, memory compression

Live virtual machine migration with adaptive, memory compres...

引用

IEEE International Conference on cluster computing

作者： Hai Jin Li Deng Song Wu Xuanhua Shi Xiaodong Pan 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

Live migration of virtual machines has been a powerful tool to facilitate system maintenance, load balancing, fault tolerance, and power-saving, especially in clusters or data centers. Although pre-copy is a predominantly used approach in the state of the art, it is difficult to provide quick migration with low network overhead, due to a great amount of transferred data during migration, leading to large performance degradation of virtual machine services. This paper presents the design and implementation of a novel memory-compression-based VM migration approach (MECOM) that first uses memory compression to provide fast, stable virtual machine migration, while guaranteeing the virtual machine services to be slightly affected. Based on memory page characteristics, we design an adaptive zero-aware compression algorithm for balancing the performance and the cost of virtual machine migration. Pages are quickly compressed in batches on the source and exactly recovered on the target. Experiment demonstrates that compared with Xen, our system can significantly reduce 27.1% of downtime, 32% of total migration time and 68.8% of total transferred data on average.

关键词： Virtual machining Virtual manufacturing Degradation Voice mail Power system management Load management Fault tolerant systems Energy management Chromium computers

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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...

引用

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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The Theory of Triangle Type-2 Fuzzy Sets

The Theory of Triangle Type-2 Fuzzy Sets

引用

International Conference on computer and Information technology (CIT)

作者： Zehua Lv Hai Jin Pingpeng Yuan 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

Interval type-2 fuzzy set is the most popular kind of type-2 fuzzy set, its characteristic is that all the secondary membership functions equal to 1. Though interval type-2 fuzzy sets can reduce the calculation complexity than other type-2 fuzzy sets, it loses much fuzzy information simultaneously. In order to solve this problem we propose a novel theory of triangle type-2 fuzzy sets, the formulas for union, intersection and complement of triangle type-2 fuzzy sets are derived and proven in detail. In addition, the relationship and the conversion between triangle type-2 fuzzy sets and interval type-2 fuzzy sets are discussed.

关键词： Fuzzy sets Fuzzy set theory Uncertainty grid computing Fuzzy systems Gaussian distribution Frequency selective surfaces Information technology computer science Artificial intelligence

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VDE: Seamless Mobility on Desktop Environment

VDE: Seamless Mobility on Desktop Environment

引用

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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Optimize Performance of Virtual Machine Checkpointing via Memory Exclusion

Optimize Performance of Virtual Machine Checkpointing via Me...

引用

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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vBench: A micro-benchmark for File - I/O performance of virtual machines

vBench: A micro-benchmark for File - I/O performance of virt...

引用

IEEE Asia-Pacific Conference on Services computing (APSCC)

作者： Pingpeng Yuan Hai Jin Ding Ye Wenzhi Cao Yaowei Yan Xia Xie Service Computing Technology and System Laboratory Cluster and Grid Computing Laboratory School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

Resurgence of virtualization calls for suitable benchmark to validate the design of virtualization system. Among the virtual machines' performance, I/O especially disk I/O is the most critical one. Since I/O is a key factor that impacts virtual machine performance, this paper introduces a benchmark-vBench for disk I/O micro-performance evaluation of virtual machine. vBench is mainly consisted of serial disk I/O evaluation and parallel disk I/O evaluation. Since error during test is inevitable, for the purpose of error correction, we design an efficient approach which we runs the same workloads in two loops, then the execution times of two loops minus each other. The approach can correctly deal with loop overhead. To prevent compiler from optimizing the code and lead to the wrong execution time of workloads, vBench is embedded inline assembly code. vBench provides the performance evaluation for system call of disk I/O, application level disk I/O and parallel disk I/O. Disk I/O performance evaluation of vBench can measure disk I/O micro-performance of virtual machine in certain extreme conditions. Experiments show that the results of vBench are accurate and vBench can reflect the disk I/O performance of the virtual machines correctly. Therefore, vBench is more accurate, more reliable than the traditional benchmarks and more suitable for evaluating virtual machine disk I/O performance.

关键词： Virtual machining Error correction grid computing computer science Benchmark testing Optimizing compilers Assembly systems Time measurement Aggregates Voice mail

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