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Proceedings of the 3rd ACM SIGCHI symposium on engineering interactive computing systems

作者： Ludwig, Bernd Hacker, Martin Schaller, Richard Zenker, Bjoern Ivanov, Alexei V. Riccardi, Giuseppe Department for AI University of Erlangen-Nuremberg Haberstr. 2 D-91058 Erlangen Germany Embedded Systems Institute University of Erlangen-Nuremberg Haberstr. 2 D-91058 Erlangen Germany Department of Information Engineering and Computer Science University of Trento I-38050 Povo di Trento Italy

ISBN: (纸本)9781450307789

Providing navigation assistance to users is a complex task generally consisting of two phases: planning a tour (phase one) and supporting the user during the tour (phase two). In the first phase, users interface to databases via constrained or natural language interaction to acquire prior knowledge such as bus schedules etc. In the second phase, often unexpected external events, such as delays or accidents, happen, user preferences change, or new needs arise. This requires machine intelligence to support users in the navigation realtime task, update information and trip replanning. To provide assistance in phase two, a navigation system must monitor external events, detect anomalies of the current situation compared to the plan built in the first phase, and provide assistance when the plan has become unfeasible. In this paper we present a prototypical mobile speech-controlled navigation system that provides assistance in both phases. The system was designed based on mplications from an analysis of real user assistance needs investigated in a diary study that underlines the vital importance of assistance in phase two. Copyright 2011 ACM.

关键词： Navigation systems

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Human pose estimation in surveillance videos using temporal continuity on static pose

Human pose estimation in surveillance videos using temporal ...

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International Conference on Image Information Processing

作者： Anima Mishra Sharma KS Venkatesh Amitabha Mukerjee Center for AI & Robotics Bangalore India Department of Electrical Engineering Indian Institute of Technology Kanpur India Department of Computer Science & Engineering Indian Institute of Technology Kanpur India

Human pose estimation from monocular image sequences is attracting increasing attention, and 2D (image-based) as well as 3D (joint-motion based) approaches have been proposed. The former is computationally fast, and works also for less frequent poses, but reliability is low. The latter is computationally expensive owing to the high-dimensionality of the problem, despite attempts at dimensionality-reduction. We propose to impose temporal continuity constraints on the 2D approaches in order to improve reliability and obtain spatio-temporal descriptions of the action in the image plane. In the first stage, at each frame-level spatial localisation will be done by applying background subtraction, after that static image pose estimation is performed using CRF-based probabilistic assembly of parts, based on the approach by Ramanan [1]. Next, pose continuity is imposed via first-order Markovian constraints on the CRF search. This results in improved spatial accuracy as well as significantly reduced search. We present results from the Weizmann video dataset to demonstrate how such an approach can serve as an image-plane based alternative to full 3D modeling or manifold search.

关键词： Estimation Videos Humans Three dimensional displays Accuracy Information processing Manifolds

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Selective block size decision algorithm for intra prediction in video coding and learning website

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2011 International Conference on Electric and Electronics, EEIC 2011

作者： Hsu, Wei-Chun Liu, Yuan-Chen Jiang, Dong-Syuan Tsai, Tsung-Han Lee, Wan-Chun Department of Electrical Engineering National Central Unervisity Zhongda Rd. 300 Zhongli City Taoyuan County 320 Taiwan Department of Computer Science National Taipei Unervisity of Education Heping E. Rd. 134 Da'an Dist. Taipei City 106 Taiwan Taipei Municipal Ren-Ai Elementary School Taiwan

ISBN: (纸本)9783642217647

In this paper, an algorithm of Selective Block Size Decision for Intra Prediction in Video Coding and Learning Website will be presented. The main purpose is to reduce the high complexity of video when predict in intra prediction to select the mode. Video coding decision is divided into two stages: the selective block size and reduce the prediction mode. When selective block size predict by the block smooth, it can divided to three stages. The smooth block use the16x16 intra prediction mode and the complexity use the 4x4 intra prediction mode. When reduce the prediction mode, we use the Elyousfi' algorithm. On experimental results, we decide the variance by 500 and use the smooth block to control the selective block size then we can get the lower complexity. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Image coding

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Search pattern based on multi-direction motion vector prediction algorithm in H.264 and learning website

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2011 International Conference on Electric and Electronics, EEIC 2011

作者： Tsai, Tsung-Han Hsu, Wei-Chun Liu, Yuan-Chen Lee, Wan-Chun Department of Electrical Engineering National Central University Zhongda Rd. 300 Zhongli City Taoyuan County 320 Taiwan Department of Computer Science National Taipei University of Education Heping E. Rd. 134 Da'an Dist. Taipei City 106 Taiwan Taipei Municipal Ren-Ai Elementary School Taiwan

ISBN: (纸本)9783642217647

Motion estimation is the most important part that needs about 80% of computation in the procedure of image compression coding. So there are many fast algorithms for motion vector search proposed to reduce time consumed and keep good qualities. In this paper some traditional algorithms and algorithms using prediction values are investigated, including DS (diamond search), HEXBS (hexagonbased search) and UMHEXagonS. The mechanism of search pattern based on multi-direction motion vector prediction algorithm is proposed to develop a fast algorithm based on motion estimation and combining search patterns and directions. At the moment, we just speed up the encoding time and perform better high PSNR values in the proposed algorithm. But that is very similar with MDS or SPS, and the factors of software and hardware like the selection of algorithms or frame number and the phase of early termination or the difference of hardware are not discussed. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Motion estimation

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Fourier shape-frequency words for actions

Fourier shape-frequency words for actions

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International Conference on Image Information Processing

作者： Bishwajit Sharma KS Venkatesh Amitabha Mukerjee Centre for AI & Robotics DRDO Complex Bangalore India Department of Electrical Engineering Indian Institute of Technology Kanpur India Department of Computer Science Indian Institute of Technology Kanpur India

Actions consist of short shape-motion fragments which recur in a seemingly unique sequence. We propose that these short fragments may constitute a concise vocabulary for actions. Models based on such “words” sometimes use the bag of words paradigm, which ignores sequence information. Also, despite the well-known utility of Fourier and similar features for temporal modelling, Fourier models have not received due attention to model action words until recently. Hence, we employ shape-frequency features as a temporally windowed Fourier transform to capture local motion and shape information. Unsupervised clustering discovers the naturally occurring modes (words) of these features. Each labelled video can thus be represented as a sequence of cluster transitions. Though different actions share common words, we observe that the word sequences are different for different actions, enabling easy discrimination. We evaluate the model on the Weizmann action dataset [1] and achieve 96.7% classification accuracy, and show how it compares to other similar algorithms.

关键词： Shape Hidden Markov models Training Feature extraction Information processing Discrete Fourier transforms Testing

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Investigating the effect of different GP algorithms on the non-stationary behavior of financial markets

Investigating the effect of different GP algorithms on the n...

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IEEE Symposium on Computational Intelligence for Financial engineering and Economics

作者： Kampouridis, Michael Chen, Shu-Heng Tsang, Edward School of Computer Science and Electronic Engineering University of Essex Wivenhoe Park CO4 3SQ United Kingdom AI-Econ Center Department of Economics National Cheng Chi University 11623 Taiwan Centre for Computational Finance and Economic Agents University of Essex Wivenhoe Park CO4 3SQ United Kingdom

ISBN: (纸本)9781424499342

This paper extends a previous market microstructure model, where we used Genetic Programming (GP) as an inference engine for trading rules, and Self Organizing Maps as a clustering machine for those rules. Experiments in that work took place under a single financial market and investigated whether its behavior is non-stationary or cyclic. Results showed that the market's behavior was constantly changing and strategies that would not adapt to these changes, would become obsolete, and their performance would thus decrease over time. However, because experiments in that work were based on a specific GP algorithm, we are interested in this paper to prove that those results are independent of the choice of such algorithms. We thus repeat our previous tests under two more GP frameworks. In addition, while our previous work surveyed only a single market, in this paper we run tests under 10 markets, for generalization purposes. Finally, we deepen our analysis and investigate whether the performance of strategies, which have not co-evolved with the market, follows a continuous decrease, as it has been previously suggested in the agent-based artificial stock market literature. Results show that our previous results are not sensitive to the choice of GP. Strategies that do not co-evolve with the market, become ineffective. However, we do not find evidence for a continuous performance decrease of these strategies. © 2011 IEEE.

关键词： Genetic programming

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Investigating the effect of different GP algorithms on the non-stationary behavior of financial markets

Investigating the effect of different GP algorithms on the n...

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Proceedings of the IEEE/IAFE Computational Intelligence for Financial engineering (CIFEr)

作者： Michael Kampouridis Shu-Heng Chen Edward Tsang School of Computer Science and Electronic Engineering University of Essex UK AI-Econ Center Department of Economics National Chengchi University Taiwan Centre of Computational Finance and Economic Agents University of Essex UK

关键词： Dinosaurs Timing Genetic programming Moment methods Clustering algorithms Radio frequency Self organizing feature maps

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The relationship of motives and achievements in teacher's online training course

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Lecture Notes in computer science

作者： Lee, Wan-Chun Liu, Yuan-Chen Fang, Te-Hsinh Hsu, Wei-Chun Taipei Municipal Ren-Ai Elementary School No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan Department of Computer Science National Taipei University of Education No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan Department of Electrical Engineering National Central University No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan

ISBN: (纸本)9783642234552

The purpose of this study is to examine the correlations between motivation and achievement of online training course of middle and elementary school teachers, as well as the impact of variables on overall learning achievement. The outcomes indicate teachers are highly motivated to participate in online training course. Typical correlation test shows motives and learning achievements supplement and affect each other. © 2011 Springer-Verlag.

关键词： Motivation

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An online summary writing system combining with concept mapping and annotation sharing

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Lecture Notes in computer science

作者： Lee, Wan-Chun Huang, Shih-Po Liu, Yuan-Chen Wang, Sheng-Ren Hsu, Wei-Chun Taipei Municipal Ren-Ai Elementary School No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan Department of Computer Science National Taipei University of Education No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan Department of Electrical Engineering National Central University No.134 Sec. 2 Heping E. Rd. Da-an District Taipei City 106 Taiwan

ISBN: (纸本)9783642234552

This study integrated concept mapping and annotation sharing of an online summarization learning environment, this approach employed concept mapping as a scaffolding, which learners grasped the key points. It helped learners complete concept mapping and wrote summary via the framework of the completed concept mapping. Research findings indicate that through concept mapping correction test participants' performance in summarization efficiency is significantly different from that of test participants who only read the article and write the summary afterwards. Among test participants who used the correction-type concept mapping with the annotation mechanism, 80% agreed that concept mapping helped them in grasping the key points of the article. With the function and effect of the online summarization learning environment that integrates concept mapping and annotation sharing, 72% of the test participants were agree or very agree. © 2011 Springer-Verlag.

关键词： computer aided instruction

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Modeling and Verification of NCL Circuits Using PAT

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Procedia engineering 2011年 15卷 3411-3415页

作者： Jieming M Ka Lok Man Eng Gee Lim Nan Zhang Chi-Un Lei Sheng-Uei Guan Taikyeong Ted. Jeong Jong Kug Seon Univeristy of Liverpool Department of Computer Science Liverpool L69 3BX UK Xi’an Jiaotong-Liverpool University No.111 Ren’ai Road Suzhou 215 123 CHN University of Hong Kong Pokfulam Hong Kong CHN Myongji University Department of Electronic Engineering Seoul KR LS Industrial Systems KR

NULL Conventional Logic (NCL) is a Delay-Insensitive (DI) clockless paradigm and is suitable for implementing asynchronous circuits. Efficient methods of analysis are required to specify and verify such DI systems. Based on Delay Insensitive sequential Process (DISP) specification, this paper demonstrates the application of formal methods by applying Process Analysis Toolkit (PAT) to model and verify the behavior of NCL circuits. A few useful constructs are successfully modeled and verified by using PAT. The flexibility and simplicity of the coding, simulation and verification shows that PAT is effective and applicable for NCL circuit design and verification.

关键词： CSP# Specification Verfication NCL circuits

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