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International Workshop on Database Technology and Applications

作者： Jun Zhou Ming Chen Huan Xiong Department of Computer Science Institute of Command Automation People''s Liberation Army University of Science and Technology Nanjing China Department of Computer Network China Electrical System Engineering Research Institute Beijing China

The frequent items problem is to process a stream as a stream of items and find all items occurring more than a given fraction of the time. It is one of the most heavily studied problems in data stream mining, dating back to the 1980s. Aiming at higher false positive rate of the Space-Saving algorithm, an LRU-based (Least Recently Used, LRU) improved algorithm with low frequency item pre-eliminated is proposed. Accuracy, stability and adaptability of the improved algorithm have been apparently enhanced. Experimental results indicate that the algorithm can not only be used to find the frequent items, and can be used to estimate the frequency of them precisely. The improved algorithm can be used for online processing both high-speed network packet stream and backbone NetFlow stream.

关键词： Monitoring Radiation detectors Algorithm design and analysis Accuracy Heuristic algorithms Complexity theory Classification algorithms

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XML defined custom microprocessors using Rapid Hardware Definition Language

XML defined custom microprocessors using Rapid Hardware Defi...

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IEEE National Conference on Aerospace and Electronics (NAECON)

作者： Jacob N. Allen Hoda S. Abdel-Aty-Zohdy Robert L. Ewing Microelectronics System Design Laboratory Department of Electrical and Computer Engineering Oakland University Rochester Hills MI USA Air Force Research Laboratory OH USA

Rapid HDL is an object oriented software library for scripting the generation of synthesizable Verilog. A fully functional customized microprocessor is defined and automatically synthesized for an FPGA from an XML specification file. Using a library of blocks, a microprocessor fabric is defined in XML. Control states specify the connections between the fabric blocks during microprocessor operation. Opcodes sequence the control states and provide a vocabulary for assembly programs, which are compiled and executed on the microprocessor.

关键词： Microprocessors Hardware design languages Hardware XML Registers Fabrics Software

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Bloom filter based secure and anonymous DSR protocol in wireless ad hoc networks

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International Journal of Security and networks 2010年第1期5卷 35-44页

作者： Xu, Li Chen, Sisheng Huang, Xinyi Mu, Yi Laboratory of Network Security and Cryptology School of Mathematics and Computer Science Fujian Normal University Fuzhou 350007 China Department of Mathematics and Computer Science FuQing Branch Fujian Normal University FuQing 350300 China School of Computer Science and Software Engineering Center for Computer and Information Security Research University of Wollongong NSW 2522 Australia

Wireless ad hoc networks, especially in the hostile environment, are vulnerable to traffic analysis which allows the adversary to trace the routing messages and the sensitive data packets. Anonymity mechanism in ad hoc networks is a critical securing measure method employed to mitigate these problems. In this paper, we propose a novel secure and anonymous source routing protocol, called SADSR, based on Dynamic Source Routing (DSR) for wireless ad hoc networks. In the proposed scheme, we use the pseudonym, pseudonym based cryptography and the bloom filter to establish secure and anonymous routing in wireless ad hoc networks. Compared to other anonymous routing protocol, SADSR is not only anonymous but also the secure in the routing discover process and data transmission pŕocess. Copyright © 2010 Inderscience Enterprises Ltd.

关键词： Routing protocols

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Optical flow switching

Optical flow switching

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OptoElectronics and Communications Conference, OECC

作者： Vincent W. S. Chan Claude E. Shannon Communication and Network Group Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology USA

We will explore a new network transport ”optical flow switching-OFS”, that will enable significant data rate growth and cost-effective scalability of next-generation networks. The talk will concentrate on the tough ... 详细信息

关键词： Optical switches Optical fiber networks Optical amplifiers Image motion analysis computer vision Wide area networks computer architecture

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Chinese text emotion classification based on emotion dictionary

Chinese text emotion classification based on emotion diction...

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IEEE Symposium on Web Society, SWS

作者： Jun Li Yuemei Xu Hao Xiong Yan Wang National Network New Media Engineering Research Center Institute of Acoustics Chinese Academy and Sciences Beijing China High-performance Network Laboratory Institute of Acoustics Chinese Academy and Sciences Beijing China National Computer System Engineering Research Institute of China Beijing China

Recently, much work have been done on text emotion classification. However, they mainly focused on the emotions expressed by authors instead of the readers. In addition, researches on simplified Chinese text emotion classification are extremely less. In this paper, we proposed a simplified Chinese text emotion classification based on readers' emotions. Mass of documents with readers' emotion tag are used as raw text sets, and Vector Space Model is used to represent each document. An emotion dictionary is created semi-automatically by using WordNet to build text vectors. We then train a Support Vector Machine classifier on preprocessed data with four emotion classes, and compared the predicate results with that from Naive Bayes classifier. Experiment results indicate that our approach performs much better on classify accuracy and efficiency.

关键词： Dictionaries Accuracy Support vector machine classification Training Feature extraction Information processing

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Liu et al. reply.

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Nature 2011年第7369期478卷 E4-E5页

作者： Liu, Yang-Yu Slotine, Jean-Jacques Barabási, Albert-László 1 1] Center for Complex Network Research and Departments of Physics Computer Science and Biology Northeastern University Boston Massachusetts 02115 USA Center for Cancer Systems Biology Dana-Farber Cancer Institute Boston Massachusetts 02115 USA 2 1] Nonlinear Systems Laboratory Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Mechanical Engineering and Department of Brain and Cognitive Sciences Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA 3 1] Center for Complex Network Research and Departments of Physics Computer Science and Biology Northeastern University Boston Massachusetts 02115 USA Department of Medicine Brigham and Women's Hospital Harvard Medical School Boston Massachusetts 02115 USA

Replying to F.-J. Müller & A. Schuppert Nature 478, 10.1038/nature10543 (2011) Müller and Schuppert1 describe an exception to our finding2 that roughly 80% of the nodes must be controlled to gain full control over gene regulatory networks. Yet our result hides subtleties that reveal as much about controllability as about the limits of our current understanding of biological networks.

关键词： Physics Applied physics and engineering

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A Generalized File Replication Scheme with Diffusion-Based Storage Load Balancing Function in Unstructured P2P File-Sharing networks

A Generalized File Replication Scheme with Diffusion-Based S...

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International Conference on Intelligent networking and Collaborative systems (INCOS)

作者： Masanori Takaoka Masato Uchida Yuji Oie Graduate School of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Network Design Research Center Kyushu Institute of Technology Tokyo Japan NCOS Laboratory NEC Communication Systems Kanagawa Japan

In this paper, we provide a generalized file replication scheme with a storage load balancing function in unstructured P2P file-sharing networks. The generalized file replication scheme is expressed as a weighted mixture of the concepts introduced in existing schemes. A mathematical analysis shows that the system behavior realized by the generalized file replication scheme can be described by a thermal diffusion equation composed of heat, reaction and diffusion terms, the weights of which are controlled by a parameter of the mixing rate. Here, the heat term represents a function to enhance file search performance by making replicas on specific peers. The reaction term represents a function to avoid concentrations of storage loads on specific peers. The diffusion term represents a function to uniform the storage loads among peers. The simulation results show that the generalized file replication scheme enables us to control the trade-off between search and storage load balancing performances extensively and intuitively by controlling the parameter of the mixing rate. In addition, the simulation results show that the generalized file replication scheme can adapt to dynamic P2P file-sharing environments.

关键词： Load management Mathematical model Heating Load modeling Equations Probabilistic logic Time measurement

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Optical flow switching

Optical flow switching

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Optical Fiber Communication (OFC) Conference

作者： Vincent W. S. Chan Joan and Irwin Jacobs Professor Claude E. Shannon Communication and Network Group Research Laboratory of Electronics Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology

Present-day networks are being challenged by dramatic increases in bandwidth demand of emerging applications. We will explore a new transport, "optical flow switching," that will enable significant growth, p... 详细信息

关键词： Image motion analysis Optical fiber networks Optical packet switching Passive optical networks Costs Bandwidth computer architecture Communication switching Scalability Packet switching

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Enhance Information Flow Tracking with Function Recognition

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China Communications 2010年第6期7卷 24-29页

作者： Zhou Kan Huang Shiqiu Huang Shan Qi Zhengwei Gu Jian Guan Haibing School of software Shanghai Jliao Tong University Shanghai 200240 P. R. China Key Lab of Information Network Security Ministry of Public Security Department of Computer Science ＆ Engineering Shanghai Jiao Tong University Shanghai 200240 P. R China Shanghai Key Laboratory of Scalable Computing ＆ System Shanghai P. R. China

With the spread use of the computers, a new crime space and method are presented for criminals. Thus computer evidence plays a key part in criminal cases. Traditional computer evidence searches require that the computer specialists know what is stored in the given computer. Binary-based information flow tracking which concerns the changes of control flow is an effective way to analyze the behavior of a program. The existing systems ignore the modifications of the data flow, which may be also a malicious behavior. Thus the function recognition is introduced to improve the information flow tracking. Function recognition is a helpful technique recognizing the function body from the software binary to analyze the binary code. And that no false positive and no false negative in our experiments strongly proves that our approach is effective.

关键词： function recognition information flow tracking program behavior e-evidence.

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Object rigidity and reflectivity identification based on motion analysis

Object rigidity and reflectivity identification based on mot...

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IEEE International Conference on Image Processing

作者： Di Zang Paul R. Schrater Katja Doerschner Department of Computer Science and Engineering University of Minnesota USA Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji China National Research Center of Magnetic Resonance and Department of Psychology Bilkent University Turkey

Rigidity and reflectivity are important properties of objects, identifying these properties is a fundamental problem for many computer vision applications like motion and tracking. In this paper, we extend our previous work to propose a motion analysis based approach for detecting the object's rigidity and reflectivity. This approach consists of two steps. The first step aims to identify object rigidity based on motion estimation and optic flow matching. The second step is to classify specular rigid and diffuse rigid objects using structure from motion and Procrustes analysis. We show how rigid bodies can be detected without knowing any prior motion information by using a mutual information based matching method. In addition, we use a statistic way to set thresholds for rigidity classification. Presented results demonstrate that our approach can efficiently classify the rigidity and reflectivity of an object.

关键词： Optical imaging Adaptive optics Mutual information Shape computer vision Integrated optics Object recognition

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