检索结果-内蒙古大学图书馆

Reliable buffering management algorithm support for multicast protocol in mobile Ad-hoc networks

Journal of Communications 2013年第2期8卷 136-150页

作者： Alahdal, Tariq Alsaqour, Raed Abdelhaq, Maha Saeed, Rashid Alsaqour, Ola Faculty of Computer Science and Information System Thamar University Thamar Yemen Faculty of Information Science and Technology University Kebangsaan Malaysia Bangi 43600 Selangor Malaysia Khartoum Sudan Faculty of Engineering and Technology University of Jordan 11942 Amman Jordan

Multicasting is one of the relevant issues of communication in infrastructure or centralized administration networks. The reliable delivery of multicast data packets needs feedback from all multicast receivers to indicate whether a retransmission is necessary. A reliable multicast delivery in the wireless Ad-hoc network requires a multicast packet to be received by all multicast receiver nodes. Thus, one or all members need to buffer data packet for possible error recovery. Furthermore, different buffer strategies are essentially used in existing reliable multicast protocols towards support error recovery and reducing buffer overflow. This study proposed two algorithms to improve the performance of the source tree reliable multicast (STRM) protocol. The first algorithm was developed to avoid buffer overflow in the sender node as the forward server (FS) nodes of STRM. This reduction is achieved by managing the buffer of the FS nodes, i.e., selecting the FS nodes depending on its empty buffer size and reducing the feedback sent from the receiver nodes to their FS node. The second algorithm was developed to decrease duplicated packets in the multicast members of the local group, which may be achieved by sending the repair packets to the requesting member. The FS in the local group should create a dynamic and temporary subgroup whose members are only those that requested the repair packet retransmission. The algorithms were tested using detailed discrete event simulation models encompassing messaging systems including error, delay, and mobility models to characterize the performance benefits of the proposed algorithms compared with the existing wireless Ad-hoc network protocols. Several experiments were conducted, revealing numerous results that verify the superior performance of the proposed algorithms over the existing algorithms. © 2013 engineering and Technology Publishing.

关键词： Multicasting

来源：评论

学校读者我要写书评

暂无评论

A secure self-destruction scheme with IBE for the internet content privacy

引用

Jisuanji Xuebao/Chinese Journal of computers 2014年第1期37卷 139-150页

作者： Xiong, Jin-Bo Yao, Zhi-Qiang Ma, Jian-Feng Li, Feng-Hua Liu, Xi-Meng Faculty of Software Fujian Normal University Fuzhou 350108 China School of Computer Science and Technology Xidian University Xi'an 710071 China State Key Laboratory of Information Security Institute of Information Engineering Chinese Academy of Sciences Beijing 100093 China Shaanxi Key Laboratory of Network and System Security Xidian University Xi'an 710071 China

With the rapid emerging of novelty Web services and cloud services, privacy information and documents of users become increasingly easy to be exposed in the Internet. To tackle the issue of lifecycle security of the privacy information and documents in the Internet, in this paper, we propose the idea of combining the three security methods of multilevel security, identity-based encryption (IBE), and distributed hash table (DHT) network. And we further propose an IBE-based secure self-destruction (ISS) scheme to protect the confidentiality and privacy of the Internet content by self-destruction after a predefined time. In our proposed ISS security scheme, the Internet content is first partitioned into many segments with diverse security levels, and each segment is encrypted with a symmetric key to obtain primitive ciphertext. By applying the methods of association and extraction, the primitive ciphertext is turned to associated ciphertext, which is then divided into extracted ciphertext and encapsulated ciphertext. The latter is encapsulated into the Internet content self-destructing object (CDO), which is stored into the storage services provider. Furthermore, to protect the privacy security when the CDO expired, the symmetric key is encrypted using the IBE algorithm based on the identity of the authorized user. The combination of this key's ciphertext and the extracted ciphertext, by means of Lagrange polynomial processing, generates mixture ciphertext shares. Then those shares are distributed into nodes within the DHT network and will be automatically discarded over the deadline when the primitive ciphertext and the symmtric key are unrecoverable. Consequently, the ISS scheme achieves the aim of secure self-destruction. Comprehensive analysis shows that the ISS scheme is able to satisfy all the design demands and is more secure than existing schemes. The ISS scheme can resist against not only the traditional cryptanalysis and brute-force attack, but also the Sybil

关键词： Access control

来源：评论

学校读者我要写书评

暂无评论

A study on an eye-contact measurement method for mental health care

A study on an eye-contact measurement method for mental heal...

引用

2013 52nd Annual Conference of the Society of Instrument and Control Engineers of Japan, SICE 2013

作者： Zushi, Yukari Sejima, Yoshihiro Osa, Atsushi Jindai, Mitsuru Watanabe, Tomio Graduate School of Science and Engineering Yamaguchi University Japan Faculty of Engineering Toyama University Japan Faculty of Computer Science and System Engineering Okayama Prefectural University Japan

In this study, we performed an experiment for examining an advanced line-of-sight measurement method in human face-to-face communication to investigate eye-contact measurement method that supports mental health care. In this experiment, an acrylic board was arranged between two talkers as a virtual display, and the gaze points were analyzed in order to examine the effects of the presence of the acrylic board on the talkers. The result demonstrated that the talkers' lines of sight were focused on the acrylic board.

关键词： Health care

来源：评论

学校读者我要写书评

暂无评论

Signature-based multi-layer distributed intrusion detection system using mobile agents

引用

International Journal of Network Security 2013年第2期15卷 97-105页

作者： Uddin, Mueen Rehman, Azizah Abdul Uddin, Naeem Memon, Jamshed Alsaqour, Raed Kazi, Suhail Faculty of Computer Engineering and Technology Asia Pacific University of Technology and Innovation Bukit Jalil 57000 Kuala Lumpur Malaysia Department of Information System Faculty of Computer Science and Information Systems Universiti Technologi Malaysia 81310 Skudai Johor Malaysia School of Computer Science Faculty of Information Science and Technology University Kebangsaan Malaysia 43600 Bangi Selangor Malaysia Faculty of Mechanical Engineering Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia

The Internet and computer networks are exposed to an increasing number of security threats. With new types of attacks appearing continually, developing flexible and adaptive security oriented approaches is a severe challenge. Intrusions detection systems (IDSs) are systems that try to detect attacks as they occur or after the attacks took place. IDSs collect network traffic information from some point on the network or computer system and then use this information to secure the network. In this context, signature-based network intrusion detection techniques are a valuable technology to protect target systems and networks against malicious activities. Signature-based detection is the most extensively used threat detection technique for (IDSs). One of the foremost challenges for signature-based IDSs is how to keep up with large volume of incoming traffic when each packet needs to be compared with every signature in the database. When an IDS cannot keep up with the traffic flood, all it can do is to drop packets, therefore, may miss potential attacks. This paper proposes a new model called Signature-based Multi-Layer IDS using mobile agents, which can detect imminent threats with extremely high success rate by dynamically and automatically creating and using small and efficient multiple databases, and at the same time, provide mechanism to update these small signature databases at regular intervals using mobile agents.

关键词： Mobile agents

来源：评论

学校读者我要写书评

暂无评论

Tracing significant association rules using critical least association rules model

引用

International Journal of Innovative Computing and Applications 2013年第1期5卷 3-17页

作者： Abdullah, Zailani Herawan, Tutut Deris, Mustafa Mat Computer Science Department Universiti Malaysia Terengganu 21030 Kuala Terengganu Terengganu Malaysia Faculty of Computer System and Software Engineering Universiti Malaysia Pahang 26300 Kuantan Pahang Malaysia Faculty of Computer Science and Information Technology Universiti Tun Hussein Onn Malaysia 86400 Batu Pahat Johor Malaysia

Mining of least association rules from large databases has received a great attention in knowledge discovery. These rules are very useful especially in tracing the unexceptional events or situations. Until this moment, the ratio of studies in this area is still unbalanced as compared to mine frequent rules. The difficulties level of mining these rules as compared to frequent rules are different since it involves with the excessive in computational costs, rather complicated and entailed a dedicated measurement. Therefore, this paper proposed an efficient model called critical least association rule (CLAR) to mine the significant rules so called critical least association rules. Several experiments with real and UCI datasets has shown that the CLAR successfully in producing the critical least association rules, up to 1.5 times faster and less 96% complexity than benchmarked FP-growth algorithm. © 2013 Inderscience Enterprises Ltd.

关键词： Association rules

来源：评论

学校读者我要写书评

暂无评论

Obsolescence optimization of electronic and mechatronic components by considering dependability and energy consumption

引用

Journal of Central South University 2013年第5期20卷 1221-1225页

作者： M.A.Mellal S.Adjerid D.Benazzouz S.Berrazouane E.J.Williams Solid Mechanics and System Laboratory Faculty of Engineering Sciences (FSI)M'Hamed Bougara University Faculty of Engineering Sciences (FSI) M'Hamed Bougara University Decision Sciences College of BusinessUniversity of Michigan Industrial and Manufacturing Systems Engineering Department College of Engineering and Computer ScienceUniversity of Michigan

Nowadays, rapid technological progress influences the dependability of equipments and also causes rapid obsolescence. The mechatronic and electronic equipment components are mostly affected by obsolescence. A new challenger unit possesses identical functionalities, but with higher performances. This work aims to find the optimal number of components which should be replaced by new-type units, under budgetary constraints. In this work, the new challenger unit is characterized by lower energy consumption and the optimization steps are based on genetic algorithm (GA). The result shows the importance of this type of replacement in order to economize energy consumption and to deal with obsolescence.

关键词： obsolescence lower energy consumption mechatronic and electronic components genetic algorithm

来源：评论

学校读者我要写书评

暂无评论

Fuzzy cognitive map reconstruction - dynamics vs. History

引用

AIP Conference Proceedings 2015年第1期1648卷

作者： Wladyslaw Homenda Agnieszka Jastrzebska Witold Pedrycz *Faculty of Mathematics and Information Science Warsaw University of Technology ul. Koszykowa 75 00-662 Warsaw Poland †System Research Institute Polish Academy of Sciences ul. Newelska 6 01-447 Warsaw Poland Department of Electrical & Computer Engineering University of Alberta Edmonton T6R 2G7 AB Canada

This study is concerned with a fundamental issue of time series representation for modeling and prediction with Fuzzy Cognitive Maps. We introduce two distinct time series representation schemes for Fuzzy Cognitive Map design. First method is based on time series amplitude, amplitude change, and change of amplitude change (dynamics perspective). Second scheme is based on three consecutive historical observations: present value, past value and before past value (history perspective). Introduced procedures are experimentally verified and compared on several synthetic and real-world time series of various characteristics. The history-oriented time series representation turned out to be more advantageous. Quality of FCM-based time series models and one-step-ahead predictions were measured in terms of Mean Squared Error. We have shown that models designed with history-oriented time series representation generally require less FCM nodes to be of comparable quality as models built on dynamics-oriented time series representation. As a result, with the history-oriented time series representation scheme we are able to construct simpler and therefore better models.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Automatic data understanding: The tool for intelligent man-machine communication

引用

AIP Conference Proceedings 2015年第1期1648卷

The paper is focused on man-machine communication, which is perceived in terms of data exchange. Understanding of data being exchanged is the fundamental property of intelligent communication. The main objective of this paper is to introduce the paradigm of intelligent data understanding. The paradigm stems from syntactic and semantic characterization of data and is soundly based on the paradigm of granular structuring of data and computation. The paper does not introduce a formal theory of intelligent data understanding. Instead this paradigm as well as notions of granularity, semantics and syntax are cast on the domain of music information. The domain immersion is forced by heavy dependence of details of the paradigm of automatic data understanding on application in a given domain.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Chip-size structure for continuous microwave irradiation using post-wall waveguide

引用

IEEJ Transactions on Sensors and Micromachines 2013年第12期133卷 365-371页

作者： Kishihara, Mitsuyoshi Yamashima, Masa Utsumi, Yuichi Faculty of Computer Science and System Engineering Okayama Prefectural University 111 Kuboki Soja-shi Okayama 719-1197 Japan Laboratory of Advanced Science and Technology for Industry University of Hyogo 3-1-2 Koto Kamigori Ako Hyogo 678-1205 Japan

Microwave application technologies such as microwave heating, microwave assisted chemistry, etc. are of the innovative green technologies. This paper proposes a chip-size structure for continuous microwave irradiation. It consists of a post-wall waveguide and a micro channel arranged among the metallic posts (pillars), and utilizes the 24.125GHz ISM band instead of the commonly used 2.45GHz ISM band to realize miniaturization. The micro channel can be embedded easily by using the gaps between the metallic posts of the post-wall waveguide, simultaneously keeping the microwave energy confined. For the input of microwave power, two types of the irradiation structure are designed. One is a structure with coaxial transmission line to post-wall waveguide transformer. The other is a structure with microstrip feed line. The temperaturetime profiles of some solvents under microwave irradiation are examined numerically and experimentally with microwave power sources of about 1W. © 2013 The Institute of Electrical Engineers of Japan.

关键词： Microwave irradiation

来源：评论

学校读者我要写书评

暂无评论

Multi-scale visual attention & saliency modelling with decision theory

Multi-scale visual attention & saliency modelling with decis...

引用

2013 20th IEEE International Conference on Image Processing, ICIP 2013

作者： Le Ngo, Anh Cat Ang, Li-Minn Qiu, Guoping Seng, Kah Phooi Faculty of Engineering University of Nottingham Malaysia Campus Malaysia School of Computer Science University of Nottingham Jubilee Campus United Kingdom Centre for Communications Engineering Research Edith Cowan University Australia Department of Computer Science and Networked System Sunway University Malaysia

ISBN: (纸本)9781479923410

Recently, an information-based saliency technique which is biologically plausible and computationally feasible called Discriminant Saliency (DIS) has been proposed. While DIS successfully defines discriminant saliency in the information theoretic sense, its implementation restraints the sampled features to a single fixed-size window and creates a bias towards objects with distinctive features fitted in the window size. This paper proposes a multi-scale discriminant saliency (MDIS) technique for visual attention which uses the wavelet transform for the multi-resolution framework. MDIS utilizes mutual information between classes and feature distribution to quantify classifying discriminant power as saliency value in multiple dyadic-scale structures. The paper will present simulations on Neil Bruce's image database with quantitative and qualitative results showing the advantages of MDIS over DIS. For quantitative comparisons, numerical tests AUC, NSS, LCC are measured and several plots are generated to visualized differences between simulation modes;meanwhile, qualitative evaluation is a visual examination of synthesized saliency maps of general natural scenes. © 2013 IEEE.

关键词： Wavelet transforms

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：