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Efficient Rate Control Algorithm for Hierarchical Video Coding

Journal of Donghua University(English Edition) 2012年第3期29卷 222-226页

作者：陆千里岑锋许维胜朱芳来 The Key Laboratory of Embedded System and Service Computing Ministry of EducationTongji University Department of Control Science&Engineering Tongji University

For rate control (RC) of hierarchical structure coding, an independent rate-quantization (R-Q) model was proposed based on mean absolute differences (MADs) in different temporal levels (TLs). In the proposed R-Q model, a novel MAD model was developed according to the hierarchical structure. The experimental results demonstrate that the proposed algorithm provides better performance, in terms of average peak signal-to-noise ratio (PSNR) and quality smoothness, than the H.264 reference model, JM14.2, under various sequences.

关键词： rate-quantization (R-Q) model rate control(RC) video coding peak signal-to-noise ratio (PSNR) hierarchical structure

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CDMC2011 data mining competition: LEVIS group results overview

CDMC2011 data mining competition: LEVIS group results overvi...

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2012 International Conference on System Simulation, ICUSS 2012

作者： Zhao, Q.C. Liu, J.M. Wang, X. You, M.Y. Li, G.Z. MOE Key Laboratory of Embedded Systems and Service Computing Department of Control Science and Engineering Tongji University Shanghai 201804 China

ISBN: (纸本)9781849195386

The task for the data mining contest organized in conjunction with the ICONIP2011 conference was to learn three predictive models (i.e. a classifier) capable of distinguishing between different classes for three separate tasks. Different combinations of data preprocess, feature selection and classifier learning methods were tried to obtain the best results.

关键词： Intrusion detection

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Analysis for one-place unbounded Petri nets based on modified reachability trees

Analysis for one-place unbounded Petri nets based on modifie...

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2012 9th IEEE International Conference on Networking, Sensing and Control, ICNSC 2012

作者： Wang, Yu Ding, ZhiJun Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9781467303880

Analysis approaches of reachability decision is fundamental to Petri nets theory;however, the relevant research work in the past cannot always guarantee the correctness of analysis conclusions. This paper firstly reveals the root cause of wrong conclusions, which are drawn in analysis for deadlock of Petri nets based on modified reachability trees (MRT), and then proposes the rectified calculation of the next-state function and some corresponding definitions, which guarantee MRT's usefulness and correctness in analyzing reachability and deadlock of one-place unbounded Petri nets. Finally, a necessary and sufficient condition of MRT's reachability and the theoretical proof are presented. Examples are given to illustrate the method. © 2012 IEEE.

关键词： Petri nets

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A New MPI Parallel computing Environment Based on Fibre-channel Token-Routing Network for Materials Simulation Research

A New MPI Parallel Computing Environment Based on Fibre-chan...

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International Conference on Advanced Materials in Microwaves and Optics (AMMO 2011)

作者： Zeng, Xiaohui Liu, Dongsheng Luo, Wenlang Fu, Lixin School of Electronics and Information Engineering Jinggangshan University China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University China

ISBN: (纸本)9783037852736

In order to apply our high efficiency fibre-channel token-routing network (shortened as FC-TR network) to the field of materials simulation research, a new MPI parallel computing environment is proposed and designed, and independently developed a parallel programming environment FC-TR-MPI based on FC-TR network. In FC-TR-MPI, a new method was applied to point-to-point communication that the network communications between processes in the same computing node were changed into memory operations;moreover, according to the underlying software and hardware features of FC-TR network, new algorithms were proposed to optimize the communication performance of some collective communications. Experimental results show that, compared with ScaMPI parallel programming environment, FC-TR-MPI has a higher parallel efficiency and speedup.

关键词： MPI parallel computing environment fibre-channel materials simulation

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A cross layer collaborating cache scheme to improve performance of HTTP clients in MANETs

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International Journal of u- and e- service, Science and Technology 2013年第6期6卷 51-57页

作者： Liu, Jin Ren, Hongmin Wang, Jin Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Shanghai International Shipping Institute Shanghai Maritime University Shanghai China Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and Technology Nanjing China College of Information Engineering Shanghai Maritime University Shanghai China

This paper proposes a novel cross layer collaborating cache scheme for HTTP clients. It is designed to accelerate the process that an HTTP client retrieves Web content in mobile ad hoc network environment. Unlike other techniques to exploit Web proxy caching or to build P2P protocol overlay to improve HTTP, our scheme incorporates collaboratively working capability into the HTTP client response cache, and thus there is no impact on the compatibility of upper level applications. In addition, as the sharing file information is diffused with routing information, there is no redundant traffic to maintain the cooperating cache mechanism. Using this scheme, cacheable Web content can be distributed among local peers and retrieved later by a client if needed. In our simulation results, this novel cache scheme significantly decreases the latency experienced by a client to download Web content. © 2013 SERSC.

关键词： HTTP

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Mobile message-aware enhancement using fuzzy lattice reasoning

Mobile message-aware enhancement using fuzzy lattice reasoni...

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2012 9th International Conference on Fuzzy systems and Knowledge Discovery, FSKD 2012

作者： Al-Sultany, Ghaidaa Li, Maozhen Ponraj, Mahesh Al-Raweshidy, Hamid School of Engineering and Design Brunel University Uxbridge UB8 3PH United Kingdom Key Laboratory of Embedded Systems and Service Computing Ministry of Education Tongji University China

ISBN: (纸本)9781467300223

Developing service discovery, information retrieval and context-aware to adapt to user everywhere/anytime and attain the ambient intelligence arise the issue of handling misclassification, imperfect reasoning and estimation with respect to the current context. To deal with this issue, we propose the use of Fuzzy set theory with the purpose of inferring and reasoning that adopt fuzzy lattice classifier for decision making. It is applied on top of SOIM framework to increase the accuracy of the classification process with clearer decisions. © 2012 IEEE.

关键词： Fuzzy set theory

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Low frequency analysis of resting-state fMRI

Low frequency analysis of resting-state fMRI

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2012 International Conference on Computer Science and Information Processing, CSIP 2012

作者： He, Lianghua Ji, Hongfei Wan, Meng Liu, Shuang Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Center for Science and Technology Development of the Ministry Education Beijing China

ISBN: (纸本)9781467314114

Resting state functional magnetic resonance imaging (rsfMRI) is a relatively new and an powerful method for evaluating regional interactions that occur when a participant is not performing an explicit task. Because of sensitiveness to time delay and length of time courses, respectively, traditional methods of correlation and coherence based on region of interest are not very suitable for rsfMRI. In this paper, we analyzed low frequency property of rsfMRI data. Firstly, we calculated the low frequency of resting-state Blood-Oxygenation-Level-Dependent(BOLD) signal on every voxel using Welch method, based on which we analyzed the statistical distribution cross subjects and voxels. The low frequency feature is proved by a series of experiments to be more robust and consistent comparing with coorelation in time domain and coherency in frequency domain. We found that the property of low frequency statistical distribution is dominant on narrow band, which is around 0.0137HZ. © 2012 IEEE.

关键词： Frequency domain analysis

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Reconstruction of table-manipulation method with constraints based on algebra-shape-computer thought

Reconstruction of table-manipulation method with constraints...

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International Conference on Mechanical Science and Engineering, ICMSE 2012

作者： Li, Dao Guo Fu, Bin Zhou, Zhong Yuan Yang, Chen School of Management Hangzhou Dianzi University Hangzhou 310018 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9783037854723

The table-manipulation method plays a important role in optimizing resource scheduling, scientifically location chosen, task assignment, investment distribution and so on. Most literatures introduction the table-manipulation method used to single thought pattern, for example, the algebra thought model, the shape thought model, or Computer software method, which cruse it is difficult to understand and apply. Therefore, a novel table-manipulation integration approach is proposed by combining the thought of algebra-shape-computer. This builds convenient access among the abstraction, modeling, solving on the practical optimizing problems discussed above. © (2012) Trans Tech Publications, Switzerland.

关键词： Algebra

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Attribute recursive algorithms based on knowledge rough representation

Attribute recursive algorithms based on knowledge rough repr...

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International Conference on Information and Business Intelligence, IBI 2011

作者： Li, Dao-Guo Fan, Zhuo-Bin Chen, Yang School of Management Hangzhou Dianzi University Hangzhou 310018 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai 200092 China

ISBN: (纸本)9783642290862

Existing representative research achievement of the relevant literatures focused on two *** is how to improve the efficiency of attribute reduction algorithms in all attributes including the added properties. Such as the recursive algorithm to change conjunctive normal form into disjunctive normal form based on the boolean matrix and the algorithm based on radix sorting for computing core and reductions of a given information system, etc. On the other hand focus on the objects recursive algorithms. The drawback is that these methods have not fully use the knowledge gained when some attributes was added to a discussion on the domain. Therefore, the regularity of the core and reduction's changes under adding new attributes into a given information system were discussed. Moreover, the incremental reduction algorithms from a information system was proposed. The experiments show that these algorithms can quickly and exactly calculate new core and reduction of the new information system by taking advantage of the knowledge of the original information system. © 2012 Springer-Verlag Berlin Heidelberg.

关键词： Rough set theory

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Analysis for one-place unbounded Petri nets based on modified reachability trees

Analysis for one-place unbounded Petri nets based on modifie...

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IEEE International Conference on Networking, Sensing and Control

作者： Yu Wang Zhi Jun Ding Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji Shanghai China Key Laboratory of Embedded ystem nd Service Computing Ministry of Education University of Tongji Shanghai China

Analysis approaches of reachability decision is fundamental to Petri nets theory; however, the relevant research work in the past cannot always guarantee the correctness of analysis conclusions. This paper firstly reveals the root cause of wrong conclusions, which are drawn in analysis for deadlock of Petri nets based on modified reachability trees (MRT), and then proposes the rectified calculation of the next-state function and some corresponding definitions, which guarantee MRT's usefulness and correctness in analyzing reachability and deadlock of one-place unbounded Petri nets. Finally, a necessary and sufficient condition of MRT's reachability and the theoretical proof are presented. Examples are given to illustrate the method.

关键词： Petri nets System recovery Firing Laboratories Educational institutions Analytical models Mathematical model

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