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13th ACM International Conference on Multimedia, MM 2005

作者： Liang, Dawei Liu, Yang Huang, Qingming Zhu, Guangyu Jiang, Shuqiang Zhang, Zhebin Gao, Wen School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School of Chinese Academy of Sciences Beijing 100039 China

ISBN: (纸本)1595930442

In this demonstration, a prototype system for generating 3D cartoon from broadcast soccer video is proposed. This system takes advantage of computer vision (CV) and computer graphics (CG) techniques to provide users new experience that can not be obtained from original video. Firstly, it uses CV techniques to obtain 3D positions of the players and ball. Then, CG techniques are applied to model the playfield, players, and ball. Finally, 3D cartoon is generated. Our system allows users to watch the game at any point of view using a 3D viewer based on OpenGL. Copyright © 2005 ACM.

关键词： Application programming interfaces (API)

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GridIS: An incentive-based grid scheduling

GridIS: An incentive-based grid scheduling

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Xiao, Lijuan Zhu, Yanmin Ni, Lionel M. Xu, Zhiwei Software Division Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China Department of Computer Science Hong Kong University of Science and Technology Clearwater Bay Kowloon Hong Kong Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China

ISBN: (纸本)0769523129

In a grid computing environment, resources are autonomous, wide-area distributed, and what's more, they are usually not free. These unique characteristics make scheduling in a self-sustainable and market-like grid highly challenging. The goal of our work is to build such a global computational grid that every participant has enough incentive to stay and play in it. There are two parties in the grid: resource consumers and resource providers. Thus the performance objective of scheduling is two-fold: for consumers, high successful execution rate of jobs, and for providers, fair allocation of benefits. We propose an incentive-based grid scheduling, GridIS, which is composed of a P2P decentralized scheduling framework and incentive-based scheduling algorithms. Simulation results show that GridIS guarantees the incentive of every participant to a satisfying extent.

关键词： Distributed computer systems

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BondFlow: A system for distributed coordination of workflows over Web services

BondFlow: A system for distributed coordination of workflows...

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19th IEEE International Parallel and Distributed Processing Symposium, IPDPS 2005

作者： Balasooriya, Janaka Padhye, Mohini Prasad, Sushil K. Navathe, Shamkant B. Georgia State University Atlanta Georgia Institute of Technology Atlanta Computer Science Department Georgia State University Yamacraw/GEDC Distributed Mobile and Embedded Systems Program College of Computing Georgia Institute of Technology Atlanta United States

ISBN: (纸本)0769523129

Today's collaborative applications over the web span domains as diverse as enterprise e-commerce applications and biomedical applications. We have previously developed and formally investigated "Web Coordination Bonds," a theoretically powerful artifact for interconnecting autonomous web objects for control and data flows, and for enforcing dependencies. Here, we describe BondFlow, a system that enables the configuration and execution of workflows using web bonds over heterogeneous web objects. The system automatically generates lightweight proxy wrapper objects to enable encapsulated web services to be interconnected through web bonds. The small footprint wrappers (less than 10 KB) can reside on Java-enabled handheld devices. We describe the design, architecture and performance of the Bond-Flow system. Our initial performance results indicate that both wrapper creation time and web bond related execution time are small. In contrast to our BondFlow system, existing systems need expert programming to create workflows, do not easily allow distributed coordination of workflows, and usually do not support heterogeneity of device, data and network. The system is preliminary, and further research is ongoing to extend its configuration and execution platforms.

关键词： Distributed computer systems

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An answer fusion model for web-based question answering

An answer fusion model for web-based question answering

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1st International Conference on Semantics, Knowledge and Grid, SKG 2005

作者： Xie, Nengfu Liu, Wenyin Department of Computer Science City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong Kowloon Hong Kong Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences China

ISBN: (纸本)0769525342

Many question answering systems are now focusing on the research of question-based answer mining from the Web information or snippets returned by the search engine. However, their main goal is only to get the related answers instead of the correct answers because answers are inconsistent. An answer fusion model and method is proposed, which makes semantic analysis of the various answers to the same question returned by search engines or question answering systems and return the fused answer based on fusion rules and data quality. Experimental test in our QA system shows that the method is effective. © 2006 IEEE.

关键词： Data fusion

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Elementary science classroom learning with wireless response devices - Implementing active and experiential learning

Elementary science classroom learning with wireless response...

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IEEE International Workshop on Wireless and Mobile Technologies in Education, WMTE 2005

作者： Chen, Yu-Fen Liu, Chen-Chung Yu, Ming-Hung Chang, Sung-Bin Lu, Yun-Chen Chan, Tak-Wai Dept. of Computer Science Information Engineering National Central University Taiwan Graduate Institute of Network Learning Technology National Central University Taiwan Degree Program of E-Learning College of Science National Chiao Tung University Taiwan Chu-Wei Elementary School Taiwan

ISBN: (纸本)0769523854

Active learning enables learners to actively engage in learning. Learning not only transfers material to students for learning, but also encourages greater mental engagement and more extensive student-student and student-instructor interaction than does a typical lecture class. Peer Instruction (PI) engages students in active learning by achieving continuous instructor-student interaction in a physics lecture. However, the methodologies and the effectiveness of implementing PI for elementary school students have seldom been clarified. This study explores the possibility of adopting PI in an elementary science classroom. The research considerations of the study are as follows: (1) how wireless technology can enhance PI in elementary science classroom;(2) how a teacher can engage students in pre-class reading, and (3) whether elementary school students have sufficient social skills to perform a PI discussion? These questions are examined by observing how the PI pedagogical model worked with a wireless response system in elementary science classroom. Based on the observation, this study also proposes a way of improving the PI learning experience of elementary school students by adding experiments and observations during peer discussion to explain concepts and phenomena in physics. © 2005 IEEE.

关键词： Learning systems

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Virtual-real comparison method used for sport simulation and analysis

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Jisuanji Yanjiu yu Fazhan/computer Research and Development 2005年第8期42卷 1324-1330页

作者： Qiu, Xianjie Wang, Zhaoqi Xia, Shihong Wu, Yongdong Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Graduate School Chinese Academy of Sciences Beijing 100039 China Department of Computer Science Taiyuan University of Technology Taiyuan 030024 China

The simulation and analysis of human motion is a popular issue in simulation area and it is highly valued in sport motion training and analysis. Video is the main record form of athlete train. It is significant if we put the athlete motion of video and the normal motion of 3D virtual athlete of simulation system into the same screen because it is easy and accurate to compare the difference between them. And it will greatly benefit the athletes so that they can compare their motions with the normal motion of 3D virtual athlete and improve their competition level. While the motion of 3D virtual athlete can be observed from different viewpoints, the appearance will be different. So it is crucial to ensure that the viewpoint of virtual camera in simulation system and that in the video are the same. To solve the problem, a new concept of virtual-real comparison is put forward. Virtual here refers to the simulated motion and real is the sport video. The virtual-real comparison technique is to get the camera information from video and to adjust the view point of the virtual camera of 3D simulation system automatically. This technique is implemented in a trampoline sport simulation system and sound results are obtained. The use of virtual-real comparison technique extends the function of the sport simulation system and has greatly benefited the athlete in training.

关键词： Camera calibration Sport simulation Sport video Virtual-real comparison

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Presentation Retrieval Method Considering the Scope of Targets and Outputs

Presentation Retrieval Method Considering the Scope of Targe...

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International Workshop on Challenges in Web Information Retrieval and Integration (WIRI)

作者： H. Okamoto T. Kobayashi H. Yokota Department of Computer Science Graduate School of Information Science and Engineerig Tokyo Institute of Technology Tokyo Japan Global Scientific Information and Computing Center Tokyo Institute of Technology Tokyo Japan

We proposed the UPRISE (unified presentation slide retrieval by impression search engine) to retrieve scenes matched with given keywords from a video recording a lecture using presentation slides. To distinguish the most suitable scene for the keywords from scenes using reused or backtracked slides, we proposed a number of impression indicators based on the position, duration and context. The combined indicator is provide higher precision than the traditional TF-IDF. Moreover, our approach can still be improved by combining with some specificity factor like IDF. However, it is important to choose some appropriate range of calculating the factor. In this paper, we propose a new specificity factor ISFP (inverse scene frequency in a presentation) to indicate the appearance ratio of a keyword in a presentation corresponding to a lecture. We also have to consider scope of output. Sometimes, it is preferable to provide scenes from beginning the topic as output. To adjust the scope of output dynamically, we propose a new concept "output range". We evaluate the ISFP and scope varying method using actual lecture presentations. The experimental results indicate that the proposed method is effective especially for keywords appeared less frequently

关键词： Layout Information retrieval Content based retrieval Frequency Search engines Video recording Multimedia systems Streaming media computer science Information science

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An Implemented VLSI Architecture of Inverse Quantizer for AVS HDTV Video Decoder

An Implemented VLSI Architecture of Inverse Quantizer for AV...

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2005 6th International Conference on ASIC

作者： Bin Sheng Wen Gao Di Wu Department of Computer Science and Technology Harbin Institute of TechnologyChina Institute of Computing Technology Chinese Academy of SciencesChina Graduate School of Chinese Academy of Sciences China

AVS is Chinese new audio and video coding standard.A pipeline-based architecture of inverse quantizer for AVS video standard is proposed in this *** to using one-pass processing for Run Length Decoding,Inverse Scan and Inverse Quantization,the architecture can save many buffers,which are used to store intermediate results during multi-pass ***,the processing speed is up to one coefficient per clock cycle. This architecture has been described in Verilog HDL, simulated with VCS digital simulator,and synthesized using 0.18μm CMOS cells library by Synopsys Design *** circuit totally costs about 13.7k logic gates when running at *** results show that the architecture can support real-time inverse quantization for HDTV(1280×720,60fps) *** architecture has been implemented in a single chip HDTV decoder for AVS video and audio.

关键词： AVS An Implemented VLSI Architecture of Inverse Quantizer for AVS HDTV Video Decoder

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Wireless hearing aid system simulations using advanced design system™: A behavioral modeling approach

Wireless hearing aid system simulations using advanced desig...

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2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005

作者： Rana, Ram Singh Tang, Bin Zhang, Liang Krishna, Garg Hari Wang, Yun Institute of Microelectronics Singapore Science Park II 11 Science Park Road Singapore 117685 Singapore Graduate Program in Bioengineering National University of Singapore Singapore 117597 Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore 119260 Singapore Department of Otolaryngology Faculty of Medicine National University of Singapore Singapore 119074 Singapore

ISBN: (纸本)0780387406

The stringent requirements on size and power consumption constrain the conventional hearing aid devices from providing the patients an economic and user friendly solution, specifically for better noise cancellation. With the advancements in technologies such as integrated circuits design, wireless communications and digital signal processing techniques, the wireless hearing aids having multi-microphones, analog, digital and mixed signals and radio frequency signals processing circuits, DSP and programmable units seem to be promising to provide enhanced performance. The focus of this paper is about the system simulation of a typical wireless hearing aid using Agilent Advanced Design System™. The behavioral modeling features are exploited to enable the whole system simulations including electro-acoustic transducers. A few system level simulation results are included. © 2005 IEEE.

关键词： Hearing aids

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Local invariant descriptor for image matching

Local invariant descriptor for image matching

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Lei Qin Wei Zeng Wen Gao Weiqiang Wang Graduate School of Chinese Academy of Sciences Beijing China Institute of Computing Technology Chinese Academy and Sciences Beijing China Department of Computer Science and Technology Harbin Institute of Technology China

ISBN: (纸本)0780388747

Image matching is a fundamental task of many computer vision problems. In this paper we present a novel approach for matching two images in the presence of image rotation, scale, and illumination changes. The proposed approach is based on local invariant features. A two-step process detects local invariant regions. Characteristic circles associated with these regions illustrate the position and radius of the regions. Then, the regions are represented by a new image descriptor. To test the new descriptor, we evaluate it in image matching and retrieval experiments. The experimental results show that using our descriptors results in effective and faster matching.

关键词： Image matching Image retrieval Robustness Filters computer vision Principal component analysis Histograms Detectors computer science Lighting

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