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Performance of new broadcast forwarding criteria in MANET

International Conference on Information Networking, ICOIN 2004

作者： Zhu, Lijuan Lee, Bu-Sung Seet, Boon-Chong Wong, Kai-Juan Liu, Genping Huang, Shell-Ying Lee, Keok-Kee Centre for Multimedia and Network Technology School of Computer Engineering Singapore Network Technology Research Centre Research TechnoPlaza Nanyang Technological University 4th Storey Nanyang Avenue 639798 Singapore Institute for Computing Systems Architecture Informatics University of Edinburgh JCMB Mayfield Road EdinburghEH9 3JZ United Kingdom

ISBN: (纸本)3540230343

In a mobile ad hoc network (MANET), packet broadcast is common and frequently used to disseminate information. Broadcast consume large amount of bandwidth resource, which is scarce in MANET environment. The problem is to find the ideal forward node set so as to minimize the bandwidth consumed, which is a NP-Complete problem. In this paper we will investigate three dominant node approximation algorithms: dominant pruning, total dominant pruning and partial dominant pruning algorithm. An extension to the original algorithms, modified termination criteria, is proposed. Simulation results show that the new termination criteria ensure the same coverage using a reduced number of forward nodes. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Approximation algorithms

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Using geometric shape variations to create an inverse model for a sheet metal process

Using geometric shape variations to create an inverse model ...

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作者： Rolfe, B.F. Cardew-Hall, M.J. Abdallah, S.M. West, G.A.W. School of Information Technology Deakin University Melbourne Vic 3125 Australia Department of Engineering Australian National University Canberra ACT Australia Fac. of Engineering and Architecture American University of Beirut Lebanon School of Computing Curtin University of Technology Perth WA Australia

The output of the sheet metal forming process is subject to much variation. This paper develops a method to measure shape variation in channel forming and relate this back to the corresponding process parameter levels of the manufacturing set-up to create an inverse model. The shape variation in the channels is measured using a modified form of the point distribution model (also known as the active shape model). This means that channels can be represented by a weighting vector of minimal linear dimension that contains all the shape variation information from the average formed channel. The inverse models were created using classifiers that related the weighting vectors to the process parameter levels for the blank holder force (BHF), die radii (DR) and tool gap (TG) of the parameters. Several classifiers were tested: linear, quadratic Gaussian and artificial neural networks. The quadratic Gaussian classifiers were the most accurate and the most consistent type of classifier over all the parameters.

关键词： Sheet metal

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Simulation of hardware support for OpenGL graphics architecture 1

Simulation of hardware support for OpenGL graphics architect...

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1st International Conference on Information Technology: Coding and computing, ITCC 2000

作者： Paltashev, T. Govind, N. Abla, G. Department of Electrical and Computer Engineering SD School of Mines and Technology United States Intel Corporation Computing Enhancement Architecture Lab. United States

ISBN: (纸本)0769505406

The growing number of applications for 3D graphics and imaging systems in the mass market requires the customized approach to the design of high-performance 3D graphics and imaging system architectures. That fact coupled with the strong trends to industrial standardization of graphics API, such as OpenGL, leads to enhanced portability for imaging and graphics applications. The progress on the hardware support of API functionality gives a real possibility to use a top-down approach in the design of custom graphics/imaging systems based on the mixed hardware/software implementation of the OpenGL architecture. Software simulation is a relatively cheap and fast way for initial graphics architecture template development and evaluation to acquire the structure and parameters that can be used later for HDL elaboration and simulation. This paper discusses a 3D graphics and imaging system architecture model implementation based on OpenGL API hardware support simulation. The object-oriented approach has been used for this development of analytic and software models simulating hardware units on different stages of the graphics pipeline. The Interactive Imaging System architecture Composer has been developed in this project for fast run-time simulation management, data acquisition and interpretation. The expandable set of architecture templates uses a reconfigurable shared library of "virtual hardware units" simulating the different hardware structures for graphics and image processing. © 2000 IEEE.

关键词： Imaging systems

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Simulation of hardware support for OpenGL graphics architecture

Simulation of hardware support for OpenGL graphics architect...

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International Conference on Information Technology: Coding and computing (ITCC)

作者： T. Paltashev N. Govind G. Abla Department of Electrical and Computer Engineering SD School of Mines and Technology Computing Enhancement Architecture Laboratory Intel Corporation

关键词： Graphics Object oriented modeling Computer architecture Standardization Application software Hardware design languages Analytical models Pipelines Runtime Project management

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Total quality management and the learning organization: A dialogue for change in construction

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Construction Management and Economics 2000年第3期18卷 321-331页

作者： Love, Peter E.D. Li, Heng Irani, Zahir Faniran, Olusegun School of Architecture and Building Deakin University Geelong Vic. 3217 Australia Depamnent of Information Systems and Computing Brunei University Uxbridge UB8 3PH United Kingdom Department of Building and Real Estate Hong Kong Polytechnic University Kowloon Hung Horn Hong Kong School of Civil Engineering University of New South Wales NSW 2052 Australia

Many construction organizations have misunderstood the reality that total quality management (TQM) based on continuous improvement requires a commitment to learning and that essentially it is the means to a learning organization. The paper argues that if the construction industry is to improve its performance and competitiveness, then there needs to be a cultural and behavioural shift in the mind-set of practitioners, academics and the professional institutions. Their focus should be on re-thinking their approaches to TQM so that learning becomes the norm. It is demonstrated that a relationship exists between the constructs of TQM, organizational learning, and the learning organization. Based on a review of existing literature, a conceptual model for a learning organization in construction is presented and discussed. The paper proposes some refinements to the concept of the learning organization, directed at clearly positioning the critical focus of learning at the organizational level in construction.

关键词： Change Learning organization Organizational learning Total quality management

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Optimizing the sum of linear fractional functions and applications 00

Optimizing the sum of linear fractional functions and applic...

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Proceedings of the eleventh annual ACM-SIAM symposium on Discrete algorithms

作者： Danny Z. Chen Ovidiu Daescu Yang Dai Naoki Katoh Xiadong Wu Jinhui Xu Department of Computer Science and Engineering University of Notre Dame Notre Dame IN Department of Computer Science and Engineering University of Notre Dame Notre Dame IN and Center for Applied Mathematics University of Notre Dame Notre Dame Indiana Department of Mathematical and Computing Sciences Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152 Japan and Grant-in-Aid of Ministry of Science Culture and Education of Japan Department of Architecture and Architectural Systems Graduate School of Engineering Kyoto University Yoshida-Honmachi Sakyo-ku Kyoto 606-8501 Japan Department of Computer Science and Engineering University of Notre Dame Notre Dame IN and Graduate School University of Notre Dame Notre Dame Indiana

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Directional zerotrees image coding

Directional zerotrees image coding

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Asilomar Conference on Signals, Systems & Computers

作者： V. Areekul R.H. Bamberger School of Electrical Engineering and Computer Science Washington State University Pullman WA USA Director of Computing and Educational Media Services College of Engineering and Architecture Washington State University Pullman WA USA

This paper investigates new zerotree structures for image compression. The objective of this research is to make the tree structures flexible enough to fit themselves to any significant coefficients within image subbands. In this fashion, a higher compression ratio can be achieved. The approach discussed utilizes predetermined tree structures corresponding to the natural directionality of the separable wavelet transformation. Without increasing the coder's complexity and side rate, the set partitioning in a hierarchical trees (SPIHT) codec proposed by Said and Pearlman (see IEEE Transactions on Circuits and Systems for Video Technology, vol.6, no.3, p.243-50, 1996) is modified for testing these structures. The results demonstrate some significant improvement especially for highly horizontal and vertical texture images.

关键词： Image coding Tree data structures Codecs Shape Computer science Testing Energy capture Strips Educational institutions Power engineering and energy

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Orientation adapted subband image compression

Orientation adapted subband image compression

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IEEE International Conference on Image Processing

作者： V. Areekul R.H. Bamberger School of Electrical Engineering and Computer Science Washington State University Pullman WA USA Director of Computing and Educational Media Service College of Engineering and Architecture Washington State University Pullman WA USA

A subband coding system which dynamically adapts to the local orientation of image features is investigated. In particular, the re-orientation scheme proposed by Taubman and Zakhor (1994) is used in conjunction with a separable octave-band subband decomposition. This is then followed by efficient coding techniques such as embedded zero trees, trellis coded quantization, and stack-run coding. The coded images demonstrate the superior subjective performance of the proposed methods.

关键词： Image coding Quantization

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Co-ordinated control of multiple manipulators in underwater robots

Co-ordinated control of multiple manipulators in underwater ...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： N. Kato D.M. Lane School of Marine Science & Technology Department of Naval Architecture Tokai University Shimizu Shizuoka Japan Department of Computing and Eleetical Engineering Heriot-Watt University Edinburgh UK

Reports analysis and simulation studies for the co-ordinated control of multiple manipulators on a free swimming underwater robot. The control objective is to perform an open loop control of the end effector position of one of the arms. A formulation is derived for both the inverse dynamics and inverse kinematics of an underwater robot with multiple manipulators, having a redundancy in degrees of freedom (DOF) of motion, in the presence of external generalised forces. The method is applied to a model of an underwater robot comprising a 6 DOF mission arm and a further pair of 2 DOF paddling arms used for stabilisation in a free swimming condition. The numerical simulation results show the effectiveness of the presented co-ordinated control method with the assistance of the stabilising arms.

关键词： Manipulator dynamics Open loop systems Arm Underwater vehicles Robot control Angular velocity Vehicle dynamics Force control Orbital robotics Marine technology

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NAVAL COASTAL SYSTEMS LABORATORY - UNIQUE INSITU TEST AND EVALUATION SITE

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NAVAL ENGINEERS JOURNAL 1978年第2期90卷 119-129页

作者： JOLLIFF, JV CALLAHAN, CM USN Capt. James V. Jolliff USNgraduated from the U. S. Naval Academy in 1954. Following graduation he served in the USS S. N. Moore (DD—747) and USS Cimarron (AO—22). He received his MS degrees in Naval Architecture from Webb Institute of Naval Architecture and in Financial Management from The George Washington University. He culminated his education at The Catholic University of America where he was awarded his Doctorate in Ocean Engineering in 1972. Capt. Jolliff has served in Naval Shipyards as Ship Superintendent Assistant Repair Officer and Assistant Planning & Estimating Superintendent and as such was primarily concerned with the repair and conversion of U. S. Navy skips. In addition he has served as Maintenance Officer Staff of Commander Mine Force U. S. Pacific Fleet as Co—Chairman of the Naval Engineering Division Engineering Department U. S. Naval Academy and as CV Design Manager in the Advanced Concepts Division and as Head Ship Survivability Office Naval Ship Engineering Center. An active member of ASNE since 1966 he has served as a member of the National Council and is currently the Chairman of the Journal Committee. He has had several papers presented at ASNE Day and published in the Journal and in 1976 was one of the recipients of the ASNE President's Award. At the present time he is assigned as the Commanding Officer Naval Coastal Systems Laboratory (NCSL) Panama City Fla. Mr. Casville M. Callahanis a native of Southwest Virginia where he attended Elementary and Secondary School prior to his three year's service in the U. S. Navy during World War II. He graduated from Lincoln Memorial University Harrogate Tenn. in 1950 receiving his BS degree in Mathematics. In 1952 he received his MS degree in Mathematics from Auburn University Auburn Ala. and taught mathematics at Lincoln Memorial University and at Florida State University Tallahassee Fla. prior to joining the staff of the Mine Defense Laboratory in 1955. He has progressed through a variety of assignments as the Labo

Test and Evaluation have become paramount in today's Department of Defense acquisition process. Therefore, the U. S. Navy requires both private and public facilities to accomplish the final goals of the “Fly before Buy” concept. Such a facility exists at the Naval Coastal Systems Laboratory (NCSL); an integral part of the Chief of Naval Material's, Director of Navy Laboratories organization. This paper briefly addresses the Laboratory, its mission, and its history. This is followed by an in—depth facilities overview in order to create an understanding of the slow but steady evolution of NCSL's unique fixed facilities. These facilities, when coupled to the local natural environment, provide a unique in situ test and evaluation capability which is unequalled in the United States for assessing seagoing coastal systems. Of prime consideration is the Range Date Acquisition Center (RADAC) and Its ancillary subsystems for tracking, environmental monitoring, communications, and post run analysis. The paper is concluded with a discussion of both past and present use of the aforementioned facilities with an emphasis on user acceptance and future potential growth.

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