检索结果-内蒙古大学图书馆

IEEE Symposium on Bioinformatics and Bioengineering (BIBE)

作者： Aaron McKenna Gil Alterovitz Bioinformatics Program Boston University Boston MA USA Harvard Partners Center for Genetics and Genomics Harvard Medical School Boston MA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA Children's Hospital Informatics Program Boston MA

The breadth of biological data collected in the last decade has far outstripped the methods available to process it. To effectively investigate and explore this abundance of data, novel automated collection and analysis approaches must be devised. We have developed a new open software framework, the Open Genomic Analysis Platform (OGAP), to aid in the analysis of genomic data. It is capable of analyzing a variety of data source, and focuses on using information theory to characterize data. The frameworks has is capable of import a variety of genome tied data, and provides custom analysis and visualization of results. We then demonstrate the use of this framework analyzing the Prochlorococcus Marinus organism. We show a strong correlation between the information content of sequence data and up regulation of gene expression during lytic infection.

关键词： Genomics Bioinformatics Data analysis Biological information theory Open source software Information analysis Information theory Data visualization Organisms Gene expression

来源：评论

学校读者我要写书评

暂无评论

Efficient models for timetable information in public transportation systems

引用

ACM Journal of Experimental Algorithmics 2008年第pp1–39期12卷 1–39页

作者： Pyrga, Evangelia Schulz, Frank Wagner, Dorothea Zaroliagis, Christos Max-Planck-Institut für Informatik University of Karlsruhe CTI University of Patras Max-Planck-Institut für Informatik 66123 Saarbrücken Stuhlsatzenhausweg 85 Germany Department of Computer Science University of Karlsruhe 76128 Karlsruhe Germany R.A. Computer Technology Institute Patras University Campus 26500 Patras N. Kazantzaki Str Greece Department of Computer Engineering and Informatics University of Patras 26500 Patras Greece

We consider two approaches that model timetable information in public transportation systems as shortest-path problems in weighted graphs. In the time-expanded approach, every event at a station, e.g., the departure of a train, is modeled as a node in the graph, while in the time-dependent approach the graph contains only one node per station. Both approaches have been recently considered for (a simplified version of) the earliest arrival problem, but little is known about their relative performance. Thus far, there are only theoretical arguments in favor of the time-dependent approach. In this paper, we provide the first extensive experimental comparison of the two approaches. Using several real-world data sets, we evaluate the performance of the basic models and of several new extensions towards realistic modeling. Furthermore, new insights on solving bicriteria optimization problems in both models are presented. The time-expanded approach turns out to be more robust for modeling more complex scenarios, whereas the time-dependent approach shows a clearly better performance. © 2008 ACM.

关键词： Itinerary query Public transportation system Shortest path Timetable information

来源：评论

学校读者我要写书评

暂无评论

An Intelligent Handoff System for Wireless Cellular Networks Using Fuzzy Logic and Random Walk Model

An Intelligent Handoff System for Wireless Cellular Networks...

引用

2nd International Conference on Complex, Intelligent and Software Intensive Systems (CISIS 2008)

作者： Leonard Barolli Fatos Xhafa Arjan Durresi Akio Koyama Makoto Takizawa Department of Information and Communication Engineering Fukuoka Institute of Technology Japan Department of Languages and Informatics Systems Polytechnic University of Catalonia Barcelona Spain Department of Computer and Information Science Purdue University Indiana University Indianapolis IN USA Department of Informatics Yamagata University Yonezawa Japan Department of Computer and System Engineering Tokyo Denki University Hatoyama Saitama Japan

In mobile cellular systems the handover is a very important process to maintain the desired Quality of Service (QoS). Many handover algorithms are proposed in the literature. However, to make a better handover and keep the QoS in wireless networks is very difficult. In this paper, by using random walk model and fuzzy theory we propose a new handover system. The proposed system uses 3 parameters for handoff decision: signal strength from the present Base Station (BS), signal strength from the neighbor BS, and the distance between Mobile Station (MS) and BS. The performance evaluation via simulations shows that proposed system can avoid ping-pong effect and has a good handover decision.

关键词： Distance measurement Layout Electric fields Fault currents Circuit faults Artificial intelligence High definition video

来源：评论

学校读者我要写书评

暂无评论

Hybrid quantum computation in quantum optics

引用

Physical Review A 2008年第2期78卷 022303-022303页

作者： P. van Loock W. J. Munro Kae Nemoto T. P. Spiller T. D. Ladd Samuel L. Braunstein G. J. Milburn National Institute of Informatics 2-1-2 Hitotsubashi Chiyoda-ku Tokyo 101-8430 Japan Optical Quantum Information Theory Group Institute of Theoretical Physics I and Max-Planck Research Group Institute of Optics Information and Photonics Universität Erlangen-Nürnberg Staudtstrasse 7/B2 91058 Erlangen Germany Hewlett-Packard Laboratories Filton Road Stoke Gifford Bristol BS34 8QZ United Kingdom Edward L. Ginzton Laboratory Stanford University Stanford California 94305-4088 USA Computer Science University of York York YO10 5DD United Kingdom Centre for Quantum Computer Technology Department of Physics University of Queensland Brisbane Australia

We propose a hybrid quantum computing scheme where qubit degrees of freedom for computation are combined with quantum continuous variables for communication. In particular, universal two-qubit gates can be implemented deterministically through qubit-qubit communication, mediated by a continuous-variable bus mode (“qubus”), without direct interaction between the qubits and without any measurement of the qubus. The key ingredients are controlled rotations of the qubus and unconditional qubus displacements. The controlled rotations are realizable through typical atom-light interactions in quantum optics. For such interactions, our scheme is universal and works in any regime, including the limits of weak and strong nonlinearities.

关键词： Quantum optics

来源：评论

学校读者我要写书评

暂无评论

Vehicular Wireless Burst Switching Network: Enhancing Rural Connectivity

Vehicular Wireless Burst Switching Network: Enhancing Rural ...

引用

IEEE Globecom Workshops

作者： Farid Farahmand Ankitkumar N. Patel Jason P. Jue Vasco G. Soares Joel J. Rodrigues Department of Computer Electronics and Graphics Technology Central Connecticut State University New Britain CT USA Department of Computer Science University of Texas Dallas Richardson TX USA Institute of Telecommunications Networks and Multimedia Group Portugal Department of Informatics University of Beira Interior Covilhaa Portugal

This paper introduces a network architecture called Vehicular Wireless Burst Switching (VWBS). The main objective of this architecture is to provide low-cost connectivity solution for isolated and dispersed regions with no networks infrastructure. The proposed architecture is based on the concept of Delay Tolerant Networks (DTN) and can be applied to various scenarios, including rapid deployment of emergency communication systems when all communication links have failed. In this paper, we present an overview of VWBS networks and show how their performance, in terms of average packet delays, can be improved using store-and-forward devices called relay nodes. Furthermore, we introduce several heuristic algorithms, which can be used to place minimum number of relay nodes. Through computer simulations, we compare the performance of the algorithms and their tradeoffs. We conclude our work by examining possible open research issues in VWBS.

关键词： Burst switching Disruption tolerant networking Internet Relays Costs IP networks Microwave devices WiMAX Africa Isolation technology

来源：评论

学校读者我要写书评

暂无评论

A Cluster Head Decision System for Sensor Networks Using Fuzzy Logic and Number of Neighbor Nodes

A Cluster Head Decision System for Sensor Networks Using Fuz...

引用

2008 the First IEEE International Conference on Ubi-Media Computing and Workshops(U-Media2008)

作者： Junpei Anno Leonard Barolli Arjan Durresi Fatos Xhafa Akio Koyama Graduate School of Engineering Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi Higashi-Ku Fukuoka 811-0295 Japan Department of Information and Communication Engineering Fukuoka Institute of Technology (FIT) 3-30-1 Wajiro-Higashi Higashi-Ku Fukuoka 811-0295 Japan Department of Computer and Information Science Indiana University Purdue University Indianapolis 723 W. Michigan Street SL 280 Indianapolis IN 46202 USA Department of Languages and Informatics Systems Polytechnic University of Catalonia Jordi Girona 1-3 08034 Barcelona Spain Department of Informatics Yamagata University 4-3-16 Jonan Yonezawa 992-8510 Yamagata Japan

Cluster formation and cluster head selection are important problems in sensor network applications and can drastically affect the network’s communication energy dissipation. However, the selection of cluster head is not easy in different environments which may have different characteristics. In this paper, in order to deal with this problem we propose a power reduction algorithm for sensor networks based on fuzzy logic and number of neighbor nodes. We evaluate the proposed system by simulations and show that proposed system makes a good selection of the cluster head.

关键词： Cluster A Cluster Head Decision System for Sensor Networks Using Fuzzy Logic and Number of Neighbor Nodes Sensor Fuzzy

来源：评论

学校读者我要写书评

暂无评论

A mobile web map application for route discovery with device independent characteristics 07

A mobile web map application for route discovery with device...

引用

2007 Euro American Conference on Telematics and Information Systems, EATIS 2007

作者： Andriakopoulou, Eirini Garofalakis, John Plessas, Athanasios University of Patras Computer Engineering and Informatics Department Research Academic Computer Technology Institute

ISBN: (纸本)9781595935984

As mobile devices are becoming increasingly powerful and ubiquitous, new possibilities to get route guidance are created, allowing users to save valuable time and effort. However, mobile devices still face severe constraints that limit the possibilities that a mobile route finding application may offer. In this paper, we present a device independent mobile application that enables mobile users to receive route directions to their handheld device. This application is an extension to an existing mobile map delivery system, the m-CHARTIS system. We focus on the main features and we analyse the device independent character of the application. Implementation details are presented and finally directions for future work are proposed.

关键词： Mobile computing

来源：评论

学校读者我要写书评

暂无评论

Semantic web search for e-government: The case study of intrastat

引用

Journal of Internet technology 2007年第4期8卷 457-468页

作者： Markellos, Konstantinos Sakkopoulos, Evangelos Sirmakessis, Spiros Tsakalidis, Athanasios Research Academic Computer Technology Institute Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economics Technological Educational Institutional of Messolongi University of Patras Greece Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economy TEI of Messolongi Data Bases and Information Systems Sector E-business and Human Computer Interaction Lab.

The field of Statistics is a conceptually rich domain where information is complex, huge in volume, and highly valuable and critical for Governmental institutes. The daily production of statistical information increases exponentially worldwide, making the processing of all this information a very difficult and time - consuming task. Therefore, efficient search, filtering and browsing techniques are needed to access and process statistical data in an effective way. We present semantically enhanced search approach to enhance e-Govemment searching services. We evaluate our proposals on the case of Intrastat, that is the method of collecting information and producing statistics on the export and import of goods between Member States of the European Union (EU), providing added - value web search services. We employ Semantic Web technologies to create an intelligent search engine based on modeling the systems' electronic catalogue using the OWL ontology language, combined with AJAX techniques for usability richness and responsiveness. We present a search tool based on these technologies, that consists of a) our novel ontology for the EU Combined Nomenclature codes serving as a knowledge base, b)a semantically enhanced search and recommendation module that improves the quality of the results and c) a "Search as you type" visualization and navigation module to provide a usable interface to be used in navigation and search.

关键词： Semantic Web

来源：评论

学校读者我要写书评

暂无评论

A new burst assembly scheme based on the average packet delay and its performance for TCP traffic

引用

Optical Switching and Networking 2007年第3-4期4卷 200-212页

作者： Christodoulopoulos, Konstantinos Varvarigos, Emmanouel Vlachos, Kyriakos Computer Engineering and Informatics Department University of Patras GR26500 Rio Greece Research Academic Computer Technology Institute GR26500 Rio Greece

We propose and evaluate a new burst assembly algorithm based on the average delay of the packets comprising a burst. This method fixes the average delay of the packets belonging to an assembled burst to a desired value TAVE that may be different for each forwarding equivalence class (FEC). We show that the proposed method significantly improves the delay jitter experienced by the packets during the burst assembly process, when compared to that of timer-based and burst length-based assembly policies. Minimizing packet delay jitter is important in a number of applications, such as real-audio and streaming-video applications. We also find that the improvement in the packet delay jitter yields a corresponding significant improvement in the performance of TCP, whose operation depends critically on the ability to obtain accurate estimates of the round-trip times (RTT). © 2007 Elsevier B.V. All rights reserved.

关键词： Transmission control protocol

来源：评论

学校读者我要写书评

暂无评论

A peer-to-peer environment for monitoring multiple wireless sensor networks

A peer-to-peer environment for monitoring multiple wireless ...

引用

作者： Antonio, Athanasios Chatzigiannakis, Ioannis Kinalis, Athanasios Mylonas, Georgios Nikoletseas, Sotiris Papageorgiou, Apostolos Research Academic Computer Technology Institute Patras Greece Computer Engineering and Informatics Department University of Patras Greece

ISBN: (纸本)9781595938053

In this work we present the basic concepts in the architecture of a peer-to-peer environment for monitoring multiple wireless sensor networks, called ShareSense. ShareSense, which is currently under development, uses JXTA as a peer-to-peer substrate. We demonstrate its basic functionalities using a simple application scenario, which utilizes multiple disparate wireless sensor networks. This application scenario involves monitoring of such networks using a separate management environment and a custom application GUI, as well as using Google Earth as an additional user interface. Copyright 2007 ACM.

关键词： Distributed computer 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：