检索结果-内蒙古大学图书馆

IEEE International Symposium on Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW)

作者： Lizhe Wang Jie Tao Holger Marten Achim Streit Samee U. Khan Joanna Kolodziej Dan Chen Center for Earth Observation and Digital Earth Chinese Academy of Sciences China Steinbuch Center for Computing Karlsruhe Institute of Technology Germany Department of Electrical and Computer Engineering North Dakota State University USA Department of Mathematics and Computer Science University of Bielsko-Biała Poland School of Computer China University of Geoscience China

Recently, the computational requirements for large scale data-intensive analysis of scientific data have grown significantly. In High Energy Physics (HEP) for example, the Large Hadron Collider (LHC) produced 13 petabytes of data in 2010. This huge amount of data are processed on more than 140 computing centers distributed across 34 countries. The MapReduce paradigm has emerged as a highly successful programming model for large-scale data-intensive computing applications. However, current MapReduce implementations are developed to operate on single cluster environments and cannot be leveraged for large-scale distributed data processing across multiple clusters. On the other hand, workflow systems are used for distributed data processing across data centers. It has been reported that the workflow paradigm has some limitations for distributed data processing, such as reliability and efficiency. In this paper, we present the design and implementation of GHadoop, a MapReduce framework that aims to enable large-scale distributed computing across multiple clusters. G-Hadoop uses the Gfarm file system as an underlying file system and executes MapReduce tasks across distributed clusters. Experiments of the G-Hadoop framework on distributed clusters show encouraging results.

关键词： Servers Distributed databases Data processing Torque Software computer architecture Computational modeling

来源：评论

学校读者我要写书评

暂无评论

Controlled quantum perfect teleportation of multiple arbitrary multi-qubit states

引用

science China(Physics,Mechanics & Astronomy) 2011年第12期54卷 2208-2216页

作者： SHI RunHua HUANG LiuSheng YANG Wei ZHONG Hong National High Performance Computing Center at Hefei Department of Computer Science and Technology University of Science and Technology of China Hefei 230027 China School of Computer Science and Technology Anhui University Hefei 230039 China Suzhou Institute for Advanced Study University of Science and Technology of China Suzhou 215123 China

We present an efficient controlled quantum perfect teleportation scheme. In our scheme, multiple senders can teleport multiple arbitrary unknown multi-qubit states to a single receiver via a previously shared entanglement state with the help of one or more controllers. Furthermore, our scheme has a very good performance in the measurement and operation complexity, since it only needs to perform Bell state and single-particle measurements and to apply Controlled-Not gate and other single-particle unitary operations. In addition, compared with traditional schemes, our scheme needs less qubits as the quantum resources and exchanges less classical information, and thus obtains higher communication efficiency.

关键词： perfect quantum teleportation controlled quantum teleportation quantum state sharing

来源：评论

学校读者我要写书评

暂无评论

Classification algorithm of retina images of diabetic patients based on exudates detection

Classification algorithm of retina images of diabetic patien...

引用

International Conference on High Performance computing & Simulation (HPCS)

作者： Vesna Zeljković Milena Bojic Claude Tameze Ventzeslav Valev School of Engineering & Computing Sciences New York Institute of Technology USA University Clinic for Internal Diseases Clinical Hospital Center “Dr Dragisa Misovic - Dedinje“ Belgrade Republic of Serbia Department of Mathematics & Computer Science Lincoln University PA USA A'Sharqiyah University

The chronic hyperglycemia of diabetes is associated with long-term damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels. The regular examination of diabetic patients can potentially reduce the risk of vision impairment and in the last instance blindness. Early diabetic retinopathy detection enables application of laser therapy treatment in order to prevent or delay loss of vision. The diagnostics and detection of diabetic retinopathy is performed by specialized ophthalmologists manually and represents expensive procedure. Automatic exudates detection and retina images classification would be helpful for reducing diabetic retinopathy screening costs and encouraging regular examinations. We proposed the automated algorithm that applies mathematical modeling which enables light intensity levels emphasis, easier exudates detection, efficient and correct classification of retina images. The proposed algorithm is robust to various appearance changes of retinal fundus images which are usually processed in clinical environments.

关键词： Retina Diabetes Retinopathy Classification algorithms Diseases Algorithm design and analysis Image color analysis

来源：评论

学校读者我要写书评

暂无评论

A semantics aware approach to automated reverse engineering unknown protocols

A semantics aware approach to automated reverse engineering ...

引用

International Conference on Network Protocols

作者： Yipeng Wang Xiaochun Yun M. Zubair Shafiq Liyan Wang Alex X. Liu Zhibin Zhang Danfeng Yao Yongzheng Zhang Li Guo Graduate School of Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy of Sciences Beijing China Department of Computer Science and Engineering Michigan State University East Lansing MI U.S.A. National Computer Network Emergency Response Technical Team Coordination Center of China Beijing China Department of Computer Science and Engineering Michigan State University East Lansing MI USA National Computer Network Emergency Response Technical Team/Coordination Center of China Beijing China Department of Computer Science Virginia Tech Blacksburg VA U.S.A. Institute of Information Engineering Chinese Academy of Sciences Beijing China

Extracting the protocol message format specifications of unknown applications from network traces is important for a variety of applications such as application protocol parsing, vulnerability discovery, and system integration. In this paper, we propose ProDecoder, a network trace based protocol message format inference system that exploits the semantics of protocol messages without the executable code of application protocols. ProDecoder is based on the key insight that the n-grams of protocol traces exhibit highly skewed frequency distribution that can be leveraged for accurate protocol message format inference. In ProDecoder, we first discover the latent relationship among n-grams by first grouping protocol messages with the same semantics and then inferring message formats by keyword based clustering and cluster sequence alignment. We implemented and evaluated ProDecoder to infer message format specifications of SMB (a binary protocol) and SMTP (a textual protocol). Our experimental results show that ProDecoder accurately parses and infers SMB protocol with 100% precision and recall. For SMTP, ProDecoder achieves approximately 95% precision and recall.

关键词： Protocols Postal services Semantics Reverse engineering Electronic mail Natural language processing Vectors

来源：评论

学校读者我要写书评

暂无评论

Discovering small-world in Association Link Networks for Web-based learning

Discovering small-world in Association Link Networks for Web...

引用

2011 ACM Multimedia Conference, MM'11 and Co-Located Workshops - 3rd ACM International Workshop on Multimedia Technologies for Distance Learning, MTDL'11

作者： Zhang, Shunxiang Luo, Xiangfeng Xuan, Junyu Chen, Xue Xu, Weimin School of Computer Engineering and Science High Performance Computing Center Shanghai University 200072 Shanghai China School of Computer Science and Engineering Anhui University of Science and Technology 232001 Anhui China

ISBN: (纸本)9781450309943

Association Link Network (ALN) is a kind of Semantic Link Network built by mining the association relations among Web resources for effectively supporting Web intelligent application such as Web-based learning, and knowledge acquisition. This paper explores the Small-World properties of ALN to provide theoretical support for Web-based learning. First, a filtering algorithm of ALN is proposed to generate the filtered status of ALN by adjusting the filtering parameter. Secondly, the Small-World properties of ALN at the filtered status are calculated and analyzed by regression analysis to observe the changing trend of Small-World properties. After that, comparison of the Small-World properties between ALN and random graph shows that ALN reveals prominent Small-World characteristic. The discovery of Small-World characteristic of ALN can provide theoretical support for Web-based learning. © 2011 ACM.

关键词： Regression analysis

来源：评论

学校读者我要写书评

暂无评论

User-preferences based service selection model in large-scale services with various QoS properties

引用

Journal of Shanghai University(English Edition) 2011年第5期15卷 420-425页

作者：刘慧许东许德震雷州张龙 School of Computer Engineering and Science Shanghai University High Performance Computing Center Shanghai University Lenovo Mobile Communication Technology Limited

With the rapid growth of service scale, there are many services with the same functional properties but different non-flmctional properties on the Internet. There have been some global optimizing service selection algorithms for service selection. However, most of those approaches cannot fully reflect users＇ preferences or are not fully suitable for large-scale services selection. In this paper, an ant colony optimization （ACO） algorithm for the model of global optimizing service selection with various quality of srevice （QoS） properties is employed, and a user-preference based large-scale service selection algorithm is proposed. This algorithm aims at optimizing user-preferred QoS properties and selecting services that meet all user-defined QoS thresholds. Experiment results prove that this algorithm is very efficient in this regard.

关键词： service selection quilty of service （QoS） ant colony optimization （ACO）

来源：评论

学校读者我要写书评

暂无评论

Sparse bilinear preserving projections

Sparse bilinear preserving projections

引用

1st Asian Conference on Pattern Recognition, ACPR 2011

作者： Lai, Zhihui Chen, Qingcai Jin, Zhong Bio-Computing Research Center Shenzhen Graduate School Harbin Institute of Technology Shenzhen China School of Computer Science Nanjing University of Science and Technology Nanjing Jiangsu China

ISBN: (纸本)9781457701221

The techniques of linear dimensionality reduction have been attracted widely attention in the fields of computer vision and pattern recognition. In this paper, we propose a novel framework called Sparse Bilinear Preserving Projections (SBPP) for image feature extraction. We generalized the image-based bilinear preserving projections into sparse case for feature extraction. Different from the popular bilinear linear projection techniques, the projections of SBPP are sparse, i.e. most elements in the projections are zeros. In the proposed framework, we use the local neighborhood graph to model the manifold structure of the data set at first, and then spectral analysis and L1-norm regression by using the Elastic Net are combined together to iteratively learn the sparse bilinear projections, which optimal preserve the local geometric structure of the image manifold. Experiments on some databases show that SBPP is competitive to some state-of-the-art techniques. © 2011 IEEE.

关键词： Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Word Sense Disambiguation Corpora Acquisition via Confirmation Code 5

Word Sense Disambiguation Corpora Acquisition via Confirmati...

引用

5th International Joint Conference on Natural Language Processing, IJCNLP 2011

作者： Che, Wanxiang Liu, Ting Research Center for Social Computing and Information Retrieval MOE-Microsoft Key Laboratory of Natural Language Processing and Speech School of Computer Science and Technology Harbin Institute of Technology China

ISBN: (纸本)9789744665645

Word Sense Disambiguation (WSD) is one of the fundamental natural language processing tasks. However, lack of training corpora is a bottleneck to construct a high accurate all-words WSD system. Annotating a large-scale corpus by experts costs enormous time and financial resources. Human Computation is a novel idea for integrating human resources behind the Web, which has been wasted, to solve practical problems that are difficult for computers. Based on human computation, we design a confirmation code system, which can not only distinguish between human beings and computers (the function of normal confirmation code system), but also annotate WSD corpora. The preliminary experimental result shows that the proposed method can annotate large-scale and high-quality WSD corpora within a short time. To the best of our knowledge, this is the first attempt to use confirmation code in natural language processing for corpora acquisition. © 2011 AFNLP

关键词： Natural language processing systems

来源：评论

学校读者我要写书评

暂无评论

Improving Chinese POS Tagging with Dependency Parsing 5

Improving Chinese POS Tagging with Dependency Parsing

引用

5th International Joint Conference on Natural Language Processing, IJCNLP 2011

作者： Li, Zhenghua Che, Wanxiang Liu, Ting Research Center for Social Computing and Information Retrieval MOE-Microsoft Key Laboratory of Natural Language Processing and Speech School of Computer Science and Technology Harbin Institute of Technology China

ISBN: (纸本)9789744665645

Recent research usually models POS tagging as a sequential labeling problem, in which only local context features can be used. Due to the lack of morphological inflections, many tagging ambiguities in Chinese are difficult to handle unless consulting larger contexts. In this paper, we try to improve Chinese POS tagging by using long-distance dependencies produced by a statistical dependency parser. Experimental results show that, despite error propagation, the syntactic features can significantly improve the tagging accuracy from 93.88% to 94.41% (p -5). Detailed analysis shows that these features are helpful for ambiguous pairs like {NN,VV} and {DEC,DEG}. © 2011 AFNLP

关键词： Syntactics

来源：评论

学校读者我要写书评

暂无评论

A Graph-based Method for Entity Linking 5

A Graph-based Method for Entity Linking

引用

5th International Joint Conference on Natural Language Processing, IJCNLP 2011

作者： Guo, Yuhang Che, Wanxiang Liu, Ting Li, Sheng Research Center for Social Computing and Information Retrieval MOE-Microsoft Key Laboratory of Natural Language Processing and Speech School of Computer Science and Technology Harbin Institute of Technology China

ISBN: (纸本)9789744665645

In this paper, we formalize the task of finding a knowledge base entry that a given named entity mention refers to, namely entity linking, by identifying the most "important" node among the graph nodes representing the candidate entries. With the aim of ranking these entities by their "importance", we introduce three degree-based measures of graph connectivity. Experimental results on the TAC-KBP benchmark data sets show that our graph-based method performs comparably with the state-of-the-art methods. We also show that using the name phrase feature outperforms the commonly used bag-of-word feature for entity linking. © 2011 AFNLP

关键词： Knowledge based systems

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：