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IEEE Conference on Decision and Control

作者： Chow Yin Lai Frank L. Lewis V. Venkataramanan Xuemei Ren Shuzhi Sam Ge Thomas Liew Centre for Life Sciences (CeLS) Graduate School for Integrative Sciences and Engineering (NGS) National University of Singapore Singapore Automation and Robotics Research Institute University of Texas Arlington Fort Worth TX USA Data Storage Institute Engineering Agency for Science Technology and Research Singapore Department of Automatic Control Beijing Institute of Technology Beijing China Department of Electrical and Computer Engineering National University of Singapore Singapore

ISBN: (纸本)9781424431236

In this paper, we show that the tracking performance of a hard disk drive actuator can be improved by using two adaptive neural networks, each of which is tailored for a specific task. The first neural network utilizes accelerometer signal to detect external vibrations, and compensates for its effect on hard disk drive position via feedforward action. In particular, no information on the plant, sensor and disturbance dynamics is needed in the design of this neural network disturbance compensator. The second neural network, designed to compensate for the pivot friction, uses a signum activation function to introduce nonlinearities inherent to pivot friction, thus reducing the neural network¿s burden of expectation. The stability of the proposed scheme is analyzed by the Lyapunov criterion. Simulation results show that the tracking performance of the hard disk drives can be improved significantly with the use of both neural networks compared to the case without compensation, or when only one of the networks is activated.

关键词： Neural networks Friction Hard disks Actuators Adaptive systems Feedforward neural networks Accelerometers Signal detection Stability analysis Stability criteria

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Perceiving a corridor with CTFM ultrasonic sensing

Perceiving a corridor with CTFM ultrasonic sensing

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2007 Australasian Conference on robotics and Automation, ACRA 2007

作者： Antoun, Shérine M. McKerrow, Phillip J. Intelligent Robotics Laboratory School of Computer Science and Software Engineering University of Wollongong Australia

ISBN: (纸本)9780958758390

When deprived of sight humans adapt and use other senses for navigation. Most rely on touch (long cane), but some use auditory perception. We have observed a blind teenager echolocating using sounds (clicks) he makes with his mouth. More commonly, an ultrasonic sensor is used as a navigational aid to scan the path and environment. The echoes blind people perceive are interpreted by each individual to form an auditory scene where clear paths and obstacles are identified. With this information, the blind user threads his/her way safely through the space scanned. The work we describe here seeks to mimic a blind person using a sonar navigational aid to traverse a path or corridor. We are using a commercially available ultrasonic mobility aid to isonify and capture echoes from a corridor, we then attempt to correlate these to the geometric features of the corridor, as we perceive them. Our aim is to develop a perception system, which is capable of interpreting, in real time the echoes to discern the geometric features of the environment, so that this data can be used to navigate a robot through it.

关键词： Navigation

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Nanotech innovations: Nanotechnology enterprise at Michigan technological university

Nanotech innovations: Nanotechnology enterprise at Michigan ...

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2008 AIChE Annual Meeting, AIChE 100

作者： Jaszczak, John A. Raber, Mary Bennett, Michael Alaraje, Nasser Bergstrom, Paul L. Department of Physics Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Enterprise Program Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Department of Social Sciences Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States School of Technology Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Department of Electrical and Computer Engineering Michigan Technological University 1400 Townsend Dr. Houghton MI 49931 United States Science Technology and Society Vassar College Poughkeepsie NY 12604-0246 United States

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Reference architecture for lending industry in ULS systems

Reference architecture for lending industry in ULS systems

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29th International Conference on Software engineering - International Workshop on Software Technologies for Ultra-Large-Scale Systems, ULS'07

作者： Zhu, Liming Staples, Mark Jeffery, Ross Empirical Software Engineering Program School of Computer Science and Engineering University of New South Wales Australia

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A linear time algorithm for pricing european sequential barrier options

A linear time algorithm for pricing european sequential barr...

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13th Computing: The Australasian Theory Symposium, CATS2007

作者： Gao, Peng van der Meyden, Ron School of Computer Science and Engineering UNSW and Formal Methods Program National ICT Australia Australia

ISBN: (纸本)1920682465

Financial derivatives are contracts concerning rights and obligations to engage in future transactions on some underlying financial instrument. A major con-cern in financial markets is to compute an expected value of such contracts as a basis for trading decisions. The Cox, Ross and Rubinstein (CRR) binomial tree model is a popular discrete approach to such compu-tations, which requires time quadratic in the number of discrete temporal steps to contract termination. Lyuu has shown that barrier options can be valued with respect to the CRR model in linear time, us-ing a combinatorial method. The paper develops a generalization of Lyuu's result, showing that a class of more complex options comprised of a sequence of barriers can be valued in linear time. © 2007, Australian computer Society, Inc.

关键词： Clustering algorithms

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UML profiles for WS-Policy4MASC as support for business value driven engineering and management of Web services and their compositions

UML profiles for WS-Policy4MASC as support for business valu...

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11th IEEE International Enterprise Distributed Object Computing Conference

作者： Tosic, Vladimir Suleiman, Basem Lutfiyya, Hanan Empirical Software Engineering Program NICTA (National ICT Australia) Australia Department of Computer Science University of Western Ontario Canada School of Computer Science and Engineering University of New South Wales Australia

ISBN: (纸本)9780769528915

WS-Policy4MASC is an XML language for specification of policies for run-time Web service management (monitoring and control) activities executed by the Manageable and Adaptable Services Compositions (MASC) middleware. Among its original contributions are specfication of diverse business values (benefits or costs, tangible or intangible, agreed or possible, absolute or relative) and specification of various control strategies maximizing different business values (e.g., only agreed intangible benefits). To facilitate development of Web service systems that can be managed with WS-Policy4MASC and the MASC middleware and to improve alignment between run-time management activities and design-time models, we developed novel UML profiles for WS-Policy4MASC. Their original contributions are in improved support for: a) specification of run-time management activities and business values within design-time models, b) automatic creation of run-time management policies from design-time models, c) feedback of run-time management information values into analysis of design-time models. We validated our solutions on detailed examples.

关键词： Specifications

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Overcoming Bandwidth and Satellite Communications Limitations to Accelerate Applications of Remote Sensing and High Performance Computing for Sustainable African Development: Contributions from Egypt, Nigeria and South Africa

Overcoming Bandwidth and Satellite Communications Limitation...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Gilbert L. Rochon Magdy Wahab Gamal El Afandi Ado Dan-Isa Happy Sithole Khomotso Kganyago Souleymane Fall Joseph Quansah Akilah Martin Bereket Araya Chetan Maringanti Cliff Robinson Kaiem L. Frink Jean Pierre Antelo Rosen Center for Advanced Computing Purdue Terrestrial Observatory Purdue University-Information Technology IN USA Department of Astronomy & Meteorology Faculty of Science Cairo University Cairo Egypt Department of Meteorology & Astronomy Al-Azhar University Cairo Egypt Department of Computer Engineering Bayero University Kano Nigeria Center for High Performance Computing CHCP-CSIRO Cape Town South Africa Department of Agricultural & Biological Engineering Purdue University West Lafayette IN USA School for New Learning De Paul University Chicago IL USA Purdue Research Opportunities Program West Lafayette IN USA

Sixty-two years after the first photos of earth taken by a camera aboard a V-2 rocket in October, 1946, and forty-eight years since the first CORONA satellite images were captured, the status of remote sensing research and applications within the African continent has made dramatic progress. Many African countries now have remote sensing research centers, within government agencies, research institutes and universities. Some countries in Africa currently have earth observing and/or telecommunications satellites in orbit and/or have such assets in various planning stages. The authors document such progress, in addition to the constraints to further applications of remote sensing for sustainable development in Africa, with special reference to data distribution constraints. Moreover, the authors address the urgency for bandwidth improvements within the African continent, so as to enable sustainable development initiatives to benefit from advances in high performance computing, required for ab initio near-real-time analysis of satellite-data. Such capabilities, it is argued, are propaedeutic for time-critical initiatives, such as vulnerability assessment, disaster preparedness and mitigation, emergency response, humanitarian assistance and post-calamity reconstruction, associated with a wide array of biogenic and anthropogenic disasters. Case studies of advances in infrastructure for satellite remote sensing and high performance computing, with implications for sustainable development in Africa, are provided from Egypt, Nigeria and South Africa.

关键词： Bandwidth Satellite communication Acceleration Remote sensing High performance computing Africa Sustainable development Earth Continents Cameras

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Creating geo-specific road databases from aerial photos for driving simulation

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WSEAS Transactions on computers 2007年第6期6卷 871-879页

作者： Guo, Dahai Weeks, Arthur Klee, Harold Computer Science Program Florida Gulf Coast University 10501 FGCU Boulevard South Fort Myers FL 33965 United States School of Electric Engineering and Computer Science University of Central Florida 4000 University Boulevard Orlando FL 32816 United States

Geo-specific road databases are sometimes necessary for driving simulation studies. However, manually creating them is very time consuming. One of the reasons is that a real road can have non-uniform cross sections due to irregular shaped road boundaries. Additionally, in the UCF (University of Central Florida) driving simulator system, the road database format requires identification of repeatable cross sections, also a labor intensive process. Even though some commercial software applications, such as the MultiGen Road Tool have road modeling functions, roads with non-uniform cross-sectional profiles are still hard to model.

关键词： Database systems

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Evolutionary design of intrusion detection programs

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International Journal of Network Security 2007年第3期4卷 328-339页

作者： Abraham, Ajith Grosan, Crina Martin-Vide, Carlos IITA Professorship Program School of Computer Science and Engineering Yonsei University 134 Shinchon-dong Sudaemoon-ku Seoul 120-749 Korea Republic of Department of Computer Science Babes-Bolyai University Kogalniceanu 1 Cluj-Napoca 400084 Romania Rovira i Virgili University Spain

Intrusion detection is the process of monitoring the events occurring in a computer system or network and analyzing them for signs of intrusions, defined as attempts to compromise the confidentiality, integrity, availability, or to bypass the security mechanisms of a computer or net-work. This paper proposes the development of an Intrusion Detection program (IDP) which could detect known attack patterns. An IDP does not eliminate the use of any preventive mechanism but it works as the last defensive mechanism in securing the system. Three variants of genetic programming techniques namely Linear Ge-netic programming (LGP), Multi-Expression programming (MEP) and Gene Expression programming (GEP) were evaluated to design IDP. Several indices are used for comparisons and a detailed analysis of MEP technique is provided. Empirical results reveal that genetic programming technique could play a major role in developing IDP, which are light weight and accurate when compared to some of the conventional intrusion detection systems based on machine learning paradigms.

关键词： Intrusion detection

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Understanding ABET objectives and outcomes

Understanding ABET objectives and outcomes

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114th Annual ASEE Conference and Exposition, 2007

作者： Petersen, Owe Williams, Stephen Durant, Eric Milwaukee School of Engineering United States United States Technical Staff AT and T Bell Laboratories United States IEEE ABET EAC Program Department of Electrical Engineering and Computer Science Milwaukee School of Engineering United States

Despite the maturing of the implementation of the EAC engineering Criteria (EC2000), there persists a misinterpretation and misunderstanding regarding the program educational objectives and program outcomes. Many an engineering program still heads into the accreditation process without a clear sense of the meaning and implementation of these items. This paper traces the development of the current definitions associated with ABET criteria 2 and 3 and provides insights into the resulting impact on program and curriculum development, specifically, the assessment process. A useful understanding of objectives and outcomes can be achieved with a top-down approach. The process starts with the expected niche of the engineering world in which the graduates of an engineering program expect to pursue their intended/possible careers. The descriptors of the range of career paths and accomplishments expected of the graduates form the program objectives. The academic input and contribution that would foster and enhance the abilities of the graduates to achieve the intended career paths and accomplishments are limited to the years the graduate is a student. Hence, the skills and characteristics of the student at the time of graduation form the program outcomes since they are what a university is able to influence and attempt to assure. After establishing of the objectives and outcomes, consideration is given to the entire range of academic pursuits, from curriculum development to advising to institutional support activities. All of these form the vehicle for imparting the required knowledge and for channeling the development of the needed personal characteristics. © American Society for engineering Education, 2007.

关键词： engineering education

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