检索结果-内蒙古大学图书馆

3rd International Conference on Ubiquitous Information Management and Communication, ICUIMC'09

作者： Li, Dingding Jin, Hai Shao, Yingzhe Liao, Xiaofei Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781605584058

Virtual machine (VM) technologies are becoming more and more important among industrial and academic institutions with the decreasing cost of computer hardware. It can offer a lot of benefits including performance isolation, server consolidation, and live migration. However, the development of virtualization technology is preferred to application isolation as yet, thus the performance overheads of communicate between virtual machines which are resident on the same physical machine are relatively high. In network-intensive applications, such as Internet servers, are consolidated in a physical machine using VM technology, the inter-domain shared memory communication mechanisms is necessary. In other words, nearly all the virtual machine monitors are not very efficient in I/O performance to meet these applications' requirements. As a result, some scholars resort to inter-domain shared memory mechanisms to improve data transferring performance, but some of these solutions only provide one-way tunnel for domains to communicate with each other, and others are not network-bypass, which use the existing AF-INET protocol family, and incur unnecessary overhead brought by TCP/IP stack. In this paper, we present an inter-domain data transferring system, called IDTS, with dual-way tunnels and fully network-bypass features in Xen virtual machine environment. The design of IDTS is different from virtual network scheme in that IDTS uses static circular memory buffer shared between domains instead of the Xen page-flipping mechanism. In order to enable dual-way communication, IDTS provides two shared memory tunnels for co-resident domains to communicate with each other. Our evaluation demonstrates that IDTS can reduce inter-domain round trip latency by nearly a factor of 4, and increase bandwidth by approximately 5 times, and also keep high scalability, compared with traditional TCP/IP approach. Copyright 2009 ACM.

关键词： Virtual machine

来源：评论

学校读者我要写书评

暂无评论

Yarqs: Yet another range queries schema in DHT based P2P network

Yarqs: Yet another range queries schema in DHT based P2P net...

引用

IEEE 9th International Conference on Computer and Information Technology, CIT 2009

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

ISBN: (纸本)9780769538365

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. © 2009 IEEE.

关键词： Peer to peer networks

来源：评论

学校读者我要写书评

暂无评论

The theory of triangle Type-2 Fuzzy Sets

The theory of triangle Type-2 Fuzzy Sets

引用

IEEE 9th International Conference on Computer and Information Technology, CIT 2009

作者： Lv, Zehua Jin, Hai Yuan, Pingpeng Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9780769538365

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. © 2009 IEEE.

关键词： Membership functions

来源：评论

学校读者我要写书评

暂无评论

VMFence: A customized intrusion prevention system in distributed virtual computing environment 09

VMFence: A customized intrusion prevention system in distrib...

引用

3rd International Conference on Ubiquitous Information Management and Communication, ICUIMC'09

作者： Jin, Hai Xiang, Guofu Zhao, Feng Zou, Deqing Li, Min Shi, Lei Cluster and Grid Computing Lab. School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074 China

ISBN: (纸本)9781605584058

Intrusion Prevention System (IPS) has been an effective tool to detect and prevent unwanted attempts, which are mainly through network and system vulnerabilities, at accessing and manipulating computer systems. Intrusion detection and prevention are two main functions of IPS. As attacks are becoming massive and complex, the traditional centralized IPSes are incapable of detecting all those attempts. The existing distributed IPSes, mainly based on mobile agent, have some serious problems, such as weak security of mobile agents, response latency, large code size. In this paper, we propose a customized intrusion prevention system, VMFence, in distributed virtual computing environment to simplify the complexity of the management. In VMFence, the states of detection processes vary with those of Virtual Machines (VMs), which are described by Deterministic Finite Automata (DFA). The detection processes, each of which detects one virtual machine, reside in a privileged virtual machine. The processes run synchronously and outside of VMs in order to achieve high performance and security. The experimental results also show VMFence has higher detection efficiency than traditional intrusion detection systems and little impact on the performance of the monitored VMs. Copyright 2009 ACM.

关键词： Intrusion detection

来源：评论

学校读者我要写书评

暂无评论

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

来源：评论

学校读者我要写书评

暂无评论

Two-layered metadata service model in grid environment

引用

International Journal of High Performance computing and Networking 2009年第2期6卷 130-136页

作者： Xiong, Muzhou Jin, Hai Wu, Song Cluster and Grid Computing Lab Huazhong University of Science and Technology Wuhan 430074 China

The primary problem of data management in grid environment is how to effectively organise the geographical distributed storage devices to support the collaborative data operations. This paper focuses on how to resolve the above problem and presents a two-layered metadata service model in a grid environment which uses the locality of users' distribution and provides a platform for grid data management. It also presents a metadata replica model, which uses a sparse strongly connected graph to connect replica metadata. In this way it can obtain high performance and availability of metadata services in a grid environment. Copyright © 2009, Inderscience Publishers.

关键词： grid computing

来源：评论

学校读者我要写书评

暂无评论

Adaptive multi-round scheduling strategy for divisible workloads in grid environments

Adaptive multi-round scheduling strategy for divisible workl...

引用

International Conference on Information Networking

作者： Yongcai Tao Hai Jin Song Wu Xuanhua Shi Services Computing Technology and System Lab Cluster and Grid Computing Lab Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781424445264

Scheduling is the key to divisible workload execution. UMR (uniform multi-round) algorithm potentially performs near optimal by improving overlap of communication and computation. However, it is questioned how a static schedule works effectively in dynamic grid environment. The paper proposes an adaptive divisible workload scheduling system, which can adjust the schedule in a proactive way. An adaptive UMR-based multi-round algorithm (called AUMR) is presented and evaluated. In AUMR, if the run-time resource monitor notifies the scheduler of any resource changes, the scheduler will evaluate its impact and adjust the schedule if necessary. The experiment results show a considerable performance improvement by AUMR in dynamic grid environment.

关键词： Adaptive scheduling Processor scheduling grid computing Dynamic scheduling Monitoring Scheduling algorithm Robustness Delay Computers clustering algorithms

来源：评论

学校读者我要写书评

暂无评论

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

来源：评论

学校读者我要写书评

暂无评论

An Optimization Approach for QEMU

An Optimization Approach for QEMU

引用

International Conference on Information Science and Engineering (ICISE)

作者： Yabin Hu Hai Jin Zhibin Yu Hongyang Zheng Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781424449095

Binary translation system usually maps guest registers into host registers to accelerate the translation speed. QEMU can be treated as a typical binary translator and it uses a fixed register allocation. On most hosts, QEMU simply maps all the target registers to memory and only store a few temporary variables in host registers. However, QEMU does not consider the dependence of two or more adjacent instructions. So even a guest register's value has been loaded into the temporary variables when executing the previous instruction, the next instruction could not use the value from the temporary variable directly, which is mapped into host register. The next instruction has to reload the value from memory again. This paper presents an approach to eliminate these unnecessary operations. Tests of benchmarks from nbench show that this approach can achieve 10%~20% speed improvement.

关键词： Registers Reduced instruction set computing Runtime Information science grid computing Computer science Acceleration Benchmark testing Microarchitecture Decoding

来源：评论

学校读者我要写书评

暂无评论

A Novel clustering Algorithm for Mining Speech Data Using Baysian Network-Based Mutliple Model

A Novel Clustering Algorithm for Mining Speech Data Using Ba...

引用

Pacific-Asia Conference on Circuits, Communications and Systems, PACCS

作者： Feng Zhao Delong Wu Pingpeng Yuan Hai Jin Services Computing Technology and System Lab Cluster and Grid Computing Lab School of Computer Science and Technology Huazhong University of Science and Technology Wuhan China

With the development of speech recognition, speech data mining becomes a hot topic in fields of data mining and natural language processing. In this paper, a novel clustering algorithm is presented to describe how to do semantic mining and how to understand the developing trend of event implied in speech sequence. At first, the speech sequences are extracted into a Bayesian network presenting the relationship between different speech elements. Then, we utilize a 3-dimensional space and sequence cluster techniques to excavate implied information from speech. Considering speech data features, we improve traditional distance-based clustering algorithm to get semantic information and enhance performance. The experimental results show that our algorithm is correct and effective.

关键词： clustering algorithms Data mining Speech analysis Speech processing Speech recognition Humans Natural language processing Speech enhancement Association rules Circuits

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：