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International Conference on Communications, Circuits and systems (ICCCAS)

作者： Lucy J. Gudino Joseph X. Rodrigues S. N. Jagadeesha Computer Sc. Information Systems and member of Heracles Group Goa India Computer Sc. and Information Systems Group BITS Pilani Goa Campus Zuarinagar Goa India Dept. of Electronics Agnel Technical Education Complex Verna Goa India Dept. of Information Sc. JNN College of Engineering Shimoga Karnataka India

This paper proposes a novel approach to the design of linear phase, sharp transition, lowpass FIR filter. The filter has narrow transition band, low passband ripple and good stopband attenuation with reduced arithmetic complexity. The frequency response model of the filter is formulated using trigonometric functions of frequency to reduce the ripples due to Gibbpsilas phenomenon and to evaluate the impulse response coefficients in closed form. FIR highpass and bandpass filters of any passband width can also be designed using the proposed approach.

关键词： Finite impulse response filter Digital filters Passband Frequency response Band pass filters Complexity theory Signal processing

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Multi-domain robotic swarm communication system

2008 IEEE International Conference on System of Systems Engi...

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2008 IEEE International Conference on System of systems engineering, SoSE 2008 2008年

作者： Benavidez, Patrick Nagothu, Kranthimanoj Ray, Anjan Kumar Shaneyfelt, Ted Kota, Srinath Behera, Laxmidhar Jamshidi, Mo ACE Center Dept. of Electrical and Computer Engineering University of Texas San Antonio United States Department of Electrical Engineering Indian Institute of Technology Kanpur India School of Computing and Intelligent Systems University of Ulster Magee Campus United Kingdom

ISBN: (纸本)9781424421732

As swarm of robots from different domains works together in a System of systems, the need arises for interswarm communication. This paper presents a viable solution for robotic swarm communication and navigation for different autonomous applications. Communication is achieved through ZigBee Radio Modems and an expandable protocol to accommodate different types of data. This proposed communication system also allows dynamic swarm expansion, where a new member can be added to the swarm family. It is a complementary approach for task coordination and navigation. Navigation is an important issue to accomplish the coordination of tasks in a swarm of robots. Different environmental issues, related to navigation, have been discussed and are presented through simulation results and the real-time communication test is presented through the experimental result. © 2008 IEEE.

关键词： Swarm intelligence

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Checking Necessary Conditions for Control and Data Flow Compatibility between Business and Interaction Logics in Web Processes

Checking Necessary Conditions for Control and Data Flow Comp...

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European Conference on Web Services (ECOWS)

作者： María José Ibánez Pedro Álvarez Joaquín Ezpeleta Dept. of Comput. Sci. & Syst. Eng. Univ. of Zaragoza. Zaragoza Department of Computer Science and Systems Engineering University of Zaragoza Zaragoza Spain

Web-based applications require a flexible adaptation to the changing environment. One of the elements to achieve this aim is based on the flexible use of interaction protocols. Another key element is the separation between business process logic and interaction actions, so that runtime-depending parameters can influence the selection and parametrization of the appropriate interaction protocol. This opens the necessity of verifying whether the implementation of a given business process logic is "compatible" with a given interaction protocol. In this paper we adopt the use of ontologies for the description of the information to be exchanged between a workflow (implementing a business process) and a role (view of an interaction protocol) and show how the use of Petri net analysis techniques can be applied for proving whether a given workflow and a given role are compatible in the DENEB environment, a platform for the Development and Execution of Web processes.

关键词： Logic Protocols Web services Ontologies Petri nets Control systems computer science Data engineering systems engineering and theory Application software

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A Fuzzy Constraint Satisfaction Approach to Identify and Characterize Apnea Episodes

A Fuzzy Constraint Satisfaction Approach to Identify and Cha...

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The 2nd International Conference on Bioinformatics and Biomedical engineering(iCBBE 2008)(第二届生物信息与生物医学工程国际会议)

作者： A. Otero C.O.S. Sorzano P. Felix M. R. Alvarez C. Zamarron Dept. of Software and Knowledge Engineering. University San Pablo CEU. 28668 Madrid Spain Dept. of Electronics and Computer Science. University of Santiago de Compostela. 15782 Santiago Spa General Hospital of Galicia Pneumology Unit 15782 Santiago Spain

This paper presents an algorithm that permits the identification of apneas - cessations in the sleeping patient's respiratory flow - in the respiratory airflow signal and relates them to the drops in blood oxyhemoglobin saturation that they produce. The structural nature of the algorithm allows us to perform a detailed characterization of the identified events and to easily modify the morphological detection criteria. This proposal is based on the fuzzy set theory for the representation and manipulation of the vagueness of the medical knowledge on which it is based, and on the constraint satisfaction problem formalism to provide a computable support to medical knowledge.

关键词： Fuzzy sets Morphology Fuzzy set theory Hospitals Blood Constraint theory Synthetic aperture sonar Knowledge engineering computer science Signal processing

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Optimal Fractional Order Proportional Integral Controller for Varying Time-Delay systems

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IFAC Proceedings Volumes 2008年第2期41卷 4910-4915页

作者： Varsha Bhambhani YangQuan Chen Dingyü Xue Center for Self-Organizing and Intelligent Systems(CSOIS) Dept. of Electrical and Computer Engineering Utah State University 4120 Old Main Hill Logan UT 84322-4120 USA Faculty of Information Science and Engineering Northeastern University Shenyang 110004 P. R. China

In many industrial processes, the first order plus time delay (FOPDT) is still being widely used. FOPDT systems are also called “KLT systems (gain, delay, and time constant).” Considering uncertainties in the time delay, this paper attempts to answer this research question: “ Will a fractional order controller help and do better? “ In this paper, we first focus on fractional order proportional and integral controller (FOPI) for varying time-delay systems. Based on our previously proposed FOPI controller tuning rules using fractional M s constrained integral gain optimization (F-MIGO), we tried to simultaneously maximize the jitter margin and ITAE performance (minimize ITAE performance index) for a set of hundred KLT systems having different time-constants and time-delay values. We observed that the optimization results in enlarged jitter margin of all systems at expense of a slight decrease in ITAE performance of delay dominated systems. Further, the F-MIGO optimization based tuning rules were summarized by approximation of optimized gain parameters and fractional orders α of the FOPI controller. Simulation results are presented to verify the proposed new tuning rules for best jitter margin and ITAE performance.

关键词： Fractional calculus fractional order controller varying time-delay system FMIGO algorithm multi-objective Optimization jitter margin ITAE performance index

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An architecture of photo core transform in HD photo coding system for embedded systems of various bandwidths

An architecture of photo core transform in HD photo coding s...

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IEEE Asia-Pacific Conference on Circuits and systems

作者： Koichi Hattori Hiroshi Tsutsui Hiroyuki Ochi Yukihiro Nakamura Dept. of Communications and Computer Engineering Graduate School of Informatics Kyoto University Sakyo Kyoto Japan Dept. of Information Systems Engineering Graduate School of Information Science and Technology Osaka University Suita Osaka Japan Research Organization of Science and Engineering Ritsumeikan University Shiga Japan Research Organization of Science and Engineering Ritsumeikan University Kusatsu Shiga Japan

In this paper, we propose a novel architecture of photo core transform (PCT) which is used as transformation of image data into frequency domain in HD Photo, an emerging image coding system developed by Microsoft. In order to support various memory bus bandwidths used in system-on-a-chip (SoC) design, an implementation for each bandwidth can be derived based on our architecture. In addition, in order to reduce the local memory size and the traffic between the main and local memories, we propose a novel data transfer and storing scheme for PCT. The experimental results show that hardware modules corresponding to the given bus bandwidths can be reasonably derived from the proposed architecture.

关键词： High definition video Embedded system Bandwidth Image coding Discrete transforms Frequency domain analysis System-on-a-chip Data engineering Hardware Streaming media

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Concurrent contracts for java in JML

Concurrent contracts for java in JML

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19th International Symposium on software Reliability engineering, ISSRE 2008

作者： Araujo, Wladimir Briand, Lionel Labiche, Yvan Juniper Networks 700 Silver Seven Road Ottawa ON K2V 1C3 Canada Simula Research Laboratory University of Oslo P.O. Box 134 Lysaker 1325 Norway Software Quality Eng. Lab Dept. of Systems and Computer Eng. Carleton University 1125 Colonel By Drive Ottawa ON K1S 5B6 Canada

ISBN: (纸本)9780769534053

Design by Contract (DbC) is a software development methodology that makes use of assertions to produce better quality object-oriented software. The idea behind DbC is that a method defines a contract stating the requirements a client needs to fulfill to use it, the precondition, and the properties it ensures after its execution, the postcondition. Though there exists ample support for DbC for sequential programs, applying DbC to concurrent programs presents several challenges. The first challenge is interference, the product of multiple threads of execution modifying and accessing shared data. The second is the specification of thread-safety properties in the presence of inheritance. We present a solution to these challenges in the context of Java programs by extending the Java Modeling Language (JML) specification language. We experiment our solution on a large size industrial software system. © 2008 IEEE.

关键词： Specification languages

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Space and Speed Tradeoffs in TCAM Hierarchical Packet Classification

Space and Speed Tradeoffs in TCAM Hierarchical Packet Classi...

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IEEE Princeton Section Sarnoff Symposium

作者： Alex Kesselman Kirill Kogan Sergey Nemzer Michael Segal Google Inc USA Cisco Systems Netanya Israel Communication Systems Engineering Dept. Ben Gurion University Beer-Sheva Israel School of Computer Science Tel Aviv University Israel Compugen Ltd. Tel Aviv Israel

Hierarchical packet classification is a crucial mechanism necessary to support many Internet services such as Quality of Service (QoS) provisioning, traffic policing, and network intrusion detection. Using Ternary Content Addressable Memories (TCAMs) to perform high-speed packet classification has become the de facto standard in industry. TCAMs compare packet headers against all rules in a classification database concurrently and thus provide high throughput unparalleled by software-based solutions. However, the complexity of packet classification policies have been growing rapidly as number of services deployed on the Internet continues to increase. High TCAM memory requirement for complex hierarchical policies is a major issue as TCAMs have very limited capacity. In this paper we consider two optimization problems of dual nature: the first problem is to minimize the number of TCAM entries subject to the constraint on the maximum number of levels in the policy hierarchy; the second problem is to minimize the number of levels in the policy hierarchy subject to the constraint on the maximum number of TCAM entries. We propose efficient dynamic programming algorithms for these problems, which reduce the TCAM memory requirement. To the best of our knowledge, this is the first work to study the fundamental tradeoff between the TCAM space and the number of lookups for hierarchical packet classification. Our algorithms do not require any modifications to existing TCAMs and are thus relatively easy to deploy.

关键词： Web and internet services Quality of service Telecommunication traffic Intrusion detection Associative memory Databases Throughput Constraint optimization Dynamic programming Heuristic algorithms

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Time delay estimation in a spatially structured model using decoupled estimators for temporal and spatial parameters

Time delay estimation in a spatially structured model using ...

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ITG Workshop on Smart Antennas

作者： Felix Antreich Josef A. Nossek Gonzalo Seco A. Lee Swindlehurst German Aerospace Center (DLR) Inst. for Communications and Navigation Wessling Germany Inst. for Circuit Theory & Signal Processing Munich University of Technology (TUM) Germany Department of Telecommunication & Systems Engineering Universitat Authnòma de Barcelona Spain Dept. of Telecommunications & Systems Engineering Universitat Autonoma de Barcelona (UAB) Spain Dept. of Electrical Engineering & Computer Science The University of California Irvine CA U.S.A.

This paper deals with the joint estimation of time-delay and spatial (direction-of-arrival, DOA) parameters of several replicas of a known signal in an unknown spatially correlated field. Unstructured and structured models have been proposed for maximum likelihood (ML) estimators in the literature. The former suffers from a severe performance degradation in some scenarios, whereas the latter involves huge complexity. It is shown how the extended invariance principle (EXIP) can be applied to obtain estimates with the quality of those of the structured model, but with the complexity of the unstructured one. We present a method to improve the quality of the time-delay estimates obtained with an unstructured spatial model when an estimate of the DOAs is available. Exemplarily, simulation results for time-delay estimation for GPS (Global Positioning System) are included and confirm that our proposal approaches the Cramer-Rao lower bound (CRLB) of the structured model even when suboptimal DOA estimates obtained by ESPRIT are introduced.

关键词： Delay estimation Delay effects

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Abstracts from the 2011 Joint Annual Meeting of the Society for Northwestern Vertebrate Biology and Washington Chapter of the Wildlife Society, Held at the Wesley Inn, Gig Harbor, Washington, March 23–25, 2011

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Northwestern Naturalist 2011年第2期92卷 136-166页

作者： Michael J. Adams Christopher A. Pearl Jessica Y. Adkins Daniel D. Roby Ladd Bayliss Peter J. Loschl Donald E. Lyons Yasuko Suzuki Hannah E. Anderson Sarah T. Hamman Keith B. Aubry Catherine M. Raley John J. Rohrer Eric C. Lofroth Scott H. Fitkin Michael L. Best Hartwell H. Welsh Jamie B. Bettaso Don T. Ashton Hartwell H. Welsh Scott McBain Lindsay M. Biga Andrew R. Blaustein Susan F. Brady R. Steven Wagner Daniel J. Selski James E. Johnson R. Bruce Bury Wynn W. Cudmore Hartwell H. Welsh Nathan D. Chelgren Tara Chestnut Chaucney W. Anderson Julie Kirshtein Megan T. Cook Tiffany S. Garcia Stephen Corn Erin Muths Amanda Kissel Rick Scherer Eric Delvin Jonathan D. Bakker Peter W. Dunwiddie Diana L. Dishman Deborah A. Duffield Harriet R. Huber Dyanna M. Lambourn Karen M. Dvornich Greg Falxa Gary M. Fellers Patrick M. Kleeman David Miller Brandon Fessler Jason T. Irwin Daniel D. Beck R. Steven Wagner Marc P. Hayes John A. Frew Christian E. Grue Chris R. Friesen Robert T. Mason Stevan J. Arnold Suzanne Estes Tiffany S. Garcia Katie M. Dugger Josh Johnson Mike Rochelle A. J. Kroll Stephanie S. Gervasi Caren S. Goldberg Dan Davis Erica Bree Rosenblum Bill Bosworth Lisette P. Waits Purnima Govindarajulu Gregory A. Green Steve Negri Jennifer R. Griffiths Daniel E. Schindler Christian E. Grue Karen M. Dvornich Adam G. Hansen David A. Beauchamp Casey M. Baldwin Marc P. Hayes Gretchen Padgett-Flohr Blake R. Hossack Winsor H. Lowe Paul Stephen Corn Aaron N. Johnston Kris Kendell Dave Prescott Scott Stevens Peter M. Kiffney Carol Volk Kerensa A. King Christian E. Grue James M. Grassley Andrew J. Kroll Matt Hane Josh Johnston Mike Rochelle Stuart Farber Niels Leuthold Michael J. Adams John P. Hayes Bo Li Michael T. Brett Kent B. Livezey Ilon E. Logan Teresa J. Lorenz Kimberly A. Sullivan Amanda V. Bakian Deanna Lynch Nancy Thomas Krysten Schuler Steven Jeffries Joshua Malt Kelly R. McAllister Joanne P. Schuett-Hames Aimee P. McIntyre Jay E. Jones Eric M. Lund Frithiof T. Waterstrat Jack N. Giovanini Stephen D. Duke Marc P. Hayes US Forest Service Pacific Northwest Research Station Olympia WA 98512 kaubry@fs.fed.us US Forest Service Okanogan-Wenatchee National Forest Methow Valley Ranger District Winthrop WA 98862 British Columbia Ministry of Environment Victoria BC V8W9M1 Washington Department of Fish and Wildlife Winthrop WA 98862 Humboldt State University 1 Harpst St. Arcata CA 95521 addsmike14@*** US Forest Service Pacific Southwest Research Station 1700 Bayside Dr. Arcata CA 95521 hwelsh@fs.fed.us US Fish and Wildlife Service Arcata Field Office 1655 Heindon Road Arcata CA 95521 jamie_bettaso@fws.gov Redwood Sciences Laboratory US Forest Service1700 Bayview Drive Arcata CA 99521 dashton@fs.fed.us hwelsh@fs.fed.us McBain &amp Trush 980 7th Street Arcata CA 95521 scott@*** Oregon State University Environmental Sciences Graduate Program Corvallis OR 97331 lindsay.biga@science.oregonstate.edu Oregon State University Department of Zoology Corvallis OR 97331 US Geological Survey Forest and Rangeland Ecosystem Science Center 3200 SW Jefferson Way Corvallis OR 97331 buryb@usgs.gov Life Science Department Chemeketa Community College Salem OR 97309 wynn.cudmore@chemeketa.edu US Forest Service Redwood Sciences Laboratory 1700 Bayview Drive Arcata CA 95521 hwelsh@fs.fed.us USGS Oregon Water Science Center 2130 SW 5th Avenue Portland OR 97207 chestnut@usgs.gov USGS Headquarters 12201 Sunrise Valley Drive Reston VA 20192 US Geological Survey Northern Rocky Mountain Science Center Aldo Leopold Wilderness Research Institute 790 E. Beckwith Avenue Missoula MT 59801 scorn@usgs.gov US Geological Survey Fort Collins Science Center 2150 Centre Avenue Building C Fort Collins CO 80526 Department of Biological Sciences Simon Fraser University Burnaby BC V5A 1S6 Colorado State University Department of Fishery and Wildlife Biology Fort Collins CO 80523 The Nature Conservancy 120 Union Ave SE Olympia WA 98501 edelvin@tnc.org School of Forest Resources University of Washington Seattle WA

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