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Control strategy of scheduling invalidation of data broadcasting

Journal of Networks 2010年第1期5卷 106-111页

作者： Wen-Bin, Hu Zhengbing, Hu Fu-Qiang, Yang Cun-Lian, Fan Lei, Wang Xin-Long, Tan Computer School Wuhan University Wuhan 430079 China State Key Lab. For Novel Software Technology Nanjing University China Department of Information Technology Huazhong Normal University China

With the number increment of mobile computing equipment, the invalidation of equipment and broadcasting information because of wireless bandwidth, communication quality and too long scheduling queue that badly influence the system computing performance. Mobile cache is a good technology to solute this difficult problem. Considering the priority problem of broadcasting queue generated by data invalidation cache, this paper designs a multi-buffer queue-scheduling model, which classifies the priority of broadcasting data. An invalidation control strategy of data broadcasting scheduling based on mobile Agent and IBM Application Response Measurement (ARM) is presented to guarantee data executing on the terminal in the right time. The results of experiments show that the invalidation rate and average work response time of the presented model and strategy in this paper are less (20%) than the single buffer queue mode and random invalidation controlling strategy. © 2010 ACADEMY PUBLISHER.

关键词： Scheduling

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Collab.ratively modeling buildings from large-scale street-side and remote sensing images

Collaboratively modeling buildings from large-scale street-s...

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2nd International Conference on Multimedia Technology, ICMT 2011

作者： Hua, Wei Zhang, Wei State Key Lab. of CAD and CG College of Computer Science Zhejiang University Hangzhou China

ISBN: (纸本)9781612847740

This paper proposed an approach to rapidly generate 3D models for street-side buildings from street-side images, remote sensing images, and GPS information. Traditional modeling methods usually require a single user to fulfill all processes of 3D modeling, and lack efficient management on massive data. Thus, they are unsuitable for large-scale modeling. In order to overcome those drawbacks, we employ the pipeline idea. The modeling processes are divided into several steps, which are further assembled to form a pipeline elab.rately. We allocate computing resources into each step according to their requirements;on the other side, human resources are deployed into the pipeline to achieve team-work modeling. To demonstrate the effectiveness of ur approach, we developed a distributed prototype system for rapid large-scale urban 3D modeling. This system was tested to build an urban scene with more than 500, 000 street-side images. The results show great improvement on modeling efficiency compared with traditional methods, and it reveals a great prospect in applications. © 2011 IEEE.

关键词： Pipelines

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Self-healing optical access networks (SHOAN) operated by optical switching technologies

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IEEE Transactions on Network and Service Management 2011年第3期8卷 234-244页

作者： Huang, Anpeng Liu, Siyu Xie, Linzhen Chen, Zhangyuan Mukherjee, Biswanath State Key Lab. of Advanced Optical Communication Systems and Networks China Wireless Communications Lab. PKU-UCLA Joint Research Institute Peking University Beijing 100871 China Department of Computer Science University of California Davis United States

An optical access network should offer low-cost reliable services to its end users. To address this problem, an optimal solution is needed which can turn an optical access architecture into a self-healing system. Hence, we propose the Self-Healing Optical Access Network (SHOAN), in which two or more optical access architectures are partners of each other, and they are interconnected by elementary optical crossbar switches into a simple mesh network. In SHOAN, the crossbar switches can keep each access architecture as an independent and closed system for only serving its own end users in normal state. But the crossbars become open in fault scenarios. Whenever a failure occurs in the network, the fault can be monitored and affected services can be recovered by the partner of the access architecture that is affected. Such an interconnected optical access network can withstand failures in its transmission paths, and recover network services in a self-healing way. Compared to existing solutions (e.g., dual-home architecture), illustrative examples demonstrate that SHOAN has many desirable properties: (1) it is robust because risks are disjointed, (2) it is reliable because service recovery is given top priority, and (3) it has low cost because redundant backup components are not necessary since the partner's resources act as backup resources. Analysis results show that SHOAN can minimize disruption duration and network cost for broadband access services. © 2011 IEEE.

关键词： Cost benefit analysis

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A model of malware passive propagation on the WWW

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Journal of Computational Information systems 2011年第7期7卷 2593-2600页

作者： Liu, Chunbo Wang, Zhi Jia, Chunfu College of Information Technical Science Nankai University Tianjin 300071 China College of Computer Science and Technology Civil Aviation University of China Tianjin 300300 China State Key Lab. for Novel Software Technology Nanjing University China

Web-based malwares host in websites fixedly and are downloaded onto user's computers automatically while users browse. This passive propagation pattern is different from that of traditional viruses and worms. A propagation model based on reverse web graph is proposed. In this model, propagation of malwares is analyzed by means of random jump matrix which combines orderness and randomness of user browsing behaviors. Explanatory experiments, which has single or multiple propagation sources respectively, prove the validity of the model. Using this model, people can evaluate the hazardness of specified websites and take corresponding countermeasures. Copyright © 2011 Binary Information Press.

关键词： Malware

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Empirical studies of pen tilting performance in pen-based user interfaces 11

Empirical studies of pen tilting performance in pen-based us...

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Proceedings of the 2011 Visual Information Communication - International Symposium

作者： Tian, Feng Cao, Xiang Lu, Fei Dai, Guozhong Zhang, Xiaolong Wang, Hongan Intelligence Engineering Lab. Institute of Software Chinese Academy of Sciences China Microsoft Research Asia China State Key Lab. of Computer Science Institute of Software Chinese Academy of Sciences China Pennsylvania State University United States

ISBN: (纸本)9781450308755

Recently, pen tilting has been explored in pen-based user interfaces and has shown potential to improve user interaction in various tasks (e.g., menu selection, modeless object manipulation). However, some basic questions concerning pen tilting behaviors, such as the ideal range, azimuth size, and direction of pen tilting, have not been thoroughly investigated. In this paper, we report our empirical studies on user performances in basic pen tilting tasks. First, we conducted a baseline study, which helps us to determine tilting directions, tilting ranges, and the thresholds that separate incidental pen tilting actions from intentional actions used for interaction. Based on the results from the baseline study, we designed an experiment to investigate user performances in goal tilting in different tilting ranges, azimuth sizes, and directions. Drawing on the results of our data analyses on task completion time, error rate, and pen tip movements, we discussed values of tilting parameters like titling range, minimal azimuth size, and tilting direction. © 2011 ACM.

关键词： User interfaces

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Simulation error characteristics of grey model GM(1,1) under translation transformation

Simulation error characteristics of grey model GM(1,1) under...

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2013 5th International Conference on Computational Intelligence, Modelling and Simulation, CIMSim 2013

作者： Wang, Yong Song, Qinbao Zeng, Bo Liu, Jin Department of Computer Science and Technology Ocean University of China Qingdao China State Key Lab. of Software Engineering Wuhan University Wuhan China Department of Computer Science and Technology Xi'An Jiaotong University Xi'an China Department of Industry Management and System Engineering University of South Florida Tampa United States State Key Lab. of Software Engineering Computer School Wuhan University Wuhan China

ISBN: (纸本)9780769551555

To reveal the change law of the simulation error of grey model GM(1,1) with translation transformation applying on the original sequence, in this paper, the experiments based on 55 real world data sequences have been conducted to study how the translation transformation influences the grey models' error characteristics. The results show that a larger translation transformation can make the total error between the model sequence and the original sequence toward zero, and the model precision remains independent. The conclusion implies that we can use translation transformation to change the original sequence data level to simplify the model building without changing the model precision. © 2013 IEEE.

关键词： Errors

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An experimental facial synthesis system using graph cut and gradient domain fusion

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1st International Conference on Technologies for E-Learning and Digital Entertainment (Edutainment 2006)

作者： Jiang, Xiaohong Dai, Fen Jiang, Hanqing College of Computer Science and Technology Zhejiang University China State Key Lab. of CAD and CG Zhejiang University China

ISBN: (纸本)3540334238

Based on the newly appeared image editing and image processing techniques, a novel interactive, computer-assisted system is proposed for facial synthesis. This paper presents the architecture of this facial synthesis system and gives a detailed description of the four key modules. The techniques used in these modules are also particularized. First, graph cut algorithm is used to automatically select region. Then gradient domain fusion is used to get better result. Finally, k-means method is used to improve efficiency. The experimental results show that our experimental facial synthesis system can produce visually good synthesized face images.

关键词： K-means clustering objective stroke background stroke automatic region selection energy minimization graph cut gradient domain fusion

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A new boundary treatment method for SPH and application in fluid simulation

A new boundary treatment method for SPH and application in f...

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3rd International Conference on Information and Computing, ICIC 2010

作者： Song, Bo Dong, Lanfang School of Computer Science and Technology USTC Hefei China Anhui Province Key Lab. of Software in Computing and Communication China

ISBN: (纸本)9780769540474

Appropriate dealing with boundary conditions is very important for SPH. Current boundary treatment methods like boundary force method, ghost particle method and virtual boundary layer method, when dealing with complex boundaries, they will have to compute much on putting external particles. For resolving this problem, we propose a new method assuming part of boundary surface instead of external particles, called effective force surface, directly repels the internal particles which approach sufficiently close. We call this new method EFS method. It is implemented in the SPH model for simulating fluid in rabbit-type cup and dam-breaking. In the former case, liquid flows vividly and no internal particles penetrate boundaries. In the latter case, the result is similar to existing result. The experimental results show that EFS method can effectively and precisely deal with complex boundary conditions. © 2010 IEEE.

关键词： Boundary conditions

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Specifying and Detecting Behavioral Changes in Source Code Using Abstract Syntax Tree Differencing

Specifying and Detecting Behavioral Changes in Source Code U...

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International Conference on Trustworthy Computing and Services, ISCTCS 2012

作者： Li, Yuankui Wang, Linzhang State Key Lab. for Novel Software Technology Nanjing University Nanjing China Department of Computer Science and Technology Nanjing University Nanjing China

ISBN: (纸本)9783642357947

During the development of a software, its source code is continuously being modified. Even after the deployment, the maintenance work still involves changing the source code. Some of the modification performed on the source code is rather meaningless, while others might cause some critical behavioral changes. To help understand the modification, we can distinguish the behavioral changes and ease the tedious work. Our approach focuses on eliminating two kinds of changes: the unessential changes and the behavioral-unrelated changes, to achieve a better change detection result. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Trees (mathematics)

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Skin detection on images with color deviation

Skin detection on images with color deviation

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2008 IEEE Congress on Services, SERVICES 2008

作者： Jiang, Zhiwei Wu, Zhaohui Yao, Min College of Computer Science Zhejiang University Hangzhou 310027 China State Key Lab. For Software Engineering Wuhan University Wuhan 430072 China

ISBN: (纸本)9780769532868

Skin detection is an important pre-process step in WEB image filter. Since color modal is based on pixel-level color information, the performance of skin detection on image with color deviation is poor. Automatic white balance (AWB) is necessary to increase skin detection accuracy. Considering that almost all nude images contain human faces, human faces can be used as reference object to perform AWB. To begin with, this paper makes use of adaboost face detection algorithm to determine face rectangle, then apply a skin detection method immune to illumination to detect skin pixels within the face rectangle. The skin color of face is then used as reference color to perform AWB before skin detection. Experimental results show that the proposed method can increase skin detection precision significantly. © 2008 IEEE.

关键词： Color

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