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International Global Information Infrastructure Symposium (GIIS)

作者： Fabio Luiz P. Albini Anelise Munaretto Mauro Fonseca Graduate School of Electrical Engineering and Computer Science (CPGEI) Federal Technological University of Parana (UTFPR) Curitiba Brazil Postgraduate Program in Computer Science (PPGIa) Pontifical Catholic University of Parana (PUCPR) Curitiba Brazil

This paper consists in a novel transport protocol description for Delay-Tolerant Networks and Disruption Tolerant Networks (both DTN). This protocol was designed to offer a better information delivery rate in DTNs scenarios. Fountain codes techniques are used to achieve our needs. The performance results were tested taking into account the hosts buffer size, the TTL (Time To Live) of the messages and the amount of redundant information generated into the network. A better delivery rate and performance were achieved using the proposed protocol.

关键词： Transport protocols Data models Delay Error correction codes Educational institutions Process control

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A Software Process Simulator Machine for software engineering simulation games

A Software Process Simulator Machine for software engineerin...

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作者： Chaves, Rafael O. Favero, Elói L. Da Tavares, Emanuel M. C. Oliveira, Sandro R.B. Postgraduate Program in Electrical Engineering ITEC UFPA Belém Pará Brazil Postgraduate Program in Computer Science ICEN UFPA Belém Pará Brazil

ISBN: (纸本)9780769543598

Develop new games without having to start from scratch has been made possible by using game engines, since they offer a number of specialized components and optimized functions which are common in games. However, one realizes that process simulation games have not taken advantage of these technologies. This paper aims to demonstrate the results of the development of a software process simulation component called Software Process Simulator Machine (SPSM), which focuses on help and motivate software process educational game development through the addressing of main generic requirements for process simulation software. © 2010 IEEE.

关键词： Software design

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A Software Process Simulator Machine for Software engineering Simulation Games

A Software Process Simulator Machine for Software Engineerin...

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Brazilian Symposium on Games and Digital Entertainment

作者： Rafael O. Chaves Eloi L. Favero Emanuel M. da C. Tavares Sandro R. B. Oliveira Postgraduate Program in Electrical Engineering ITEC - UFPA Postgraduate Program in Computer Science ICEN - UFPA

ISBN: (纸本)9781612843919

关键词： Software Process Simulation Engines

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Empirical Studies on Application of Genetic Algorithms and Ant Colony Optimization for Data Clustering

Empirical Studies on Application of Genetic Algorithms and A...

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computer Science Society (SCCC) International Conference Chilean FLAGGED

作者： Thelma Elita Colanzi Wesley Klewerton Guez Assunção Aurora Trinidad Ramirez Pozo Ana Cristina B. Kochem Vendramin Diogo Augusto Barros Pereira Computer Science Postgraduate Program Federal University of Paraná (UFPR) Curitiba Paraná Brazil Graduate School of Electrical Engineering and Computer Science (CPGEI) Federal Technological University of Paraná (UTFPR) Curitiba Paraná Brazil Informatics Department (DAINF)

Cluster analysis is used in several research areas to classify data sets in groups by their similar characteristics. Metaheuristic-based techniques, such as Genetic Algorithms (GAs) and Ant Colony Optimization (ACO), have been applied in order to increase the clustering algorithm performance. GA and ACO-based clustering algorithms are capable of efficiently and automatically forming natural groups from a pre-defined number of clusters. This paper presents a GA and an ACO algorithm to the clustering problem. Both algorithms were refined using local search in order to improve the clustering accuracy. The results are compared on numeric UCI databases.

关键词： Clustering algorithms Search problems Equations Mathematical model Gallium Genetic algorithms Memetics

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Parallel self-organizing maps with application in clustering distributed data

Parallel self-organizing maps with application in clustering...

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International Joint Conference on Neural Networks (IJCNN)

作者： Flavius L. Gorgonio Jose Alfredo F. Costa Electrical Engineering and Computer Science Postgraduate Program Federal University of Rio Grande do Norte Natal Rio Grande do Norte Brazil Adaptive Systems Laboratory Electrical Engineering Department Federal University of Rio Grande do Norte Natal Rio Grande do Norte Brazil

Clustering is the process of discovering groups within multidimensional data, based on similarities, with a minimal, if any, knowledge of their structure. Distributed data clustering is a recent approach to deal with geographically distributed databases, since traditional clustering methods require centering all databases in a single dataset. Moreover, current privacy requirements in distributed databases demand algorithms with the ability to process clustering securely. Among the unsupervised neural network models, the self-organizing map (SOM) plays a major role. SOM features include information compression while trying to preserve the topological and metric relationship of the primary data space. This paper presents a strategy for efficient cluster analysis in geographically distributed databases using SOM networks. Local datasets relative to database vertical partitions are applied to distinct maps in order to obtain partial views of the existing clusters. Units of each local map are chosen to represent original data and are sent to a central site, which performs a fusion of the partial results. Experimental results are presented for different datasets.

关键词： Distributed databases Artificial neural networks Joints Conferences Iris Clustering methods Clustering algorithms

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N-Sequence RSNS Redundancy Analysis

N-Sequence RSNS Redundancy Analysis

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IEEE International Symposium on Information Theory

作者： Brian L. Luke Phillip. E. Pace Program Development Team Navy Information Operations Command Suitland Fort Meade MD USA Department of Electrical and Computer Engineering Naval Postgraduate School Monterrey CA USA

ISBN: (纸本)142440505X

Without dispute, symmetrical folding waveforms are the most common type of waveform in engineering science (e.g., cosine, sine). symmetrical number systems (SNS) have been formed to extract the maximum amount of information from symmetrically folded waveforms. The robust symmetrical number system (RSNS) is formed using N ges 2 sequences and ensures that two successive RSNS vectors differ by only one digit. This Gray-code property reduces the possibility of encoding errors and makes the RSNS useful in applications such as folding analog-to-digital converters, direction finding antenna architectures and photonic processors. This paper determines the length of combined sequences that contain no ambiguities (Mcirc) which we call the RSNS dynamic range. The position of M is also derived. We first extend our two-sequence results to develop Mcirc for a three-sequence RSNS with moduli of the form 2 r - 1, 2 r , 2 r + 1. We then extend the results to solving the N-channel RSNS redundancy locations in general

关键词： Dynamic range Redundancy Information analysis Military computing Data mining Robustness Encoding Analog-digital conversion Directive antennas Reflective binary codes

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Parallel processing in a cluster of microcomputers with application in contingency analysis

Parallel processing in a cluster of microcomputers with appl...

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2004 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America

作者： Balduino, Liliane Alves, Antônio César Baleerio Electrical and Computer Engineering in the Postgraduate Program School of Electrical and Computer Engineering Federal University of Goiás Brazil School of Electrical and Computer Engineering Federal University of Goiás Brazil Catholic University of Goiás

ISBN: (纸本)0780387759

This work is about the use of a microcomputer network as a parallel processing environment. In order to allow the communication, the synchronization and the distribution of the tasks among processes, the PVM (Parallel Virtual Machine) and MPI (Message Passing Interface) systems, were used. These computational systems allowed for parallel processing in the area of electric power systems, namely the contingency analysis. This application, usually found in Energy Management Systems, requires the use of a large quantity of resources in a short time. The aim is to analyze thousands of disturbance scenarios, in a preventive mode in real time. Two parallel programming paradigms classified as Master/Slave, in the synchronous and asynchronous modes, were implemented. Case studies with sequential and parallel implementations were carried out to validate the algorithms used to analyze elaborated contingencies, including the use of data from the Interconnected Brazilian Electric Power System, allowing the analysis of single and multiple disturbances. ©2004 IEEE.

关键词： Microcomputers

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Devising adaptive migration policies for cooperative distributed genetic algorithms

Devising adaptive migration policies for cooperative distrib...

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IEEE International Conference on Systems, Man and Cybernetics

作者： E. Noda A.L.V. Coelho I.L.M. Ricarte A. Yamakami A.A. Freitas School of Electrical and Computer Engineering (FEEC) UNICAMP-State University of Campinas Brazil Postgraduate Program in Computer science Pontifical Catholic University of Paraná Brazil

Distributed genetic algorithms (DGAs) constitute an interesting approach to undertake the premature convergence problem in evolutionary optimization. This is done by spatial partitioning a huge panmitic population into several semi-isolated groups, called demes, each evolving in parallel by its own pace, and possibly exploring different regions of the search space. At the center of such approach lies the migratory process that simulates the swapping of individuals belonging to different demes, in such a way to ensure the sharing of good genetic material. In this paper, we model the migration step in DGAs as an explicit means to promote cooperation among genetic agents, autonomous entities encapsulating GA instances for possibly tackling different sub-problems of a complicated task. The focus is on the characterization of adaptive migration policies in which the choice of what individuals to migrate and/or replace is not defined a priori but according to a more knowledge-oriented rule. Comparative results obtained for a data-mining task were conducted, in order to assess the performance of adaptive migration according to efficiency/effectiveness criteria.

关键词： Genetic algorithms Identity-based encryption Inductors Search engines Dissolved gas analysis Parallel architectures Cloning

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SMALL SHIPS, ADVANCED TECHNOLOGY AND WARFIGHTING PERFORMANCE

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 30-45页

作者： SKOLNICK, DH SKOLNICK, A David H. Skolnickhas practiced naval engineering in both government and industry. He has supported the Military Sealift Command and the Naval Sea Systems Command Ship Design Group and Amphibious Ship Acquisition Program Office participating in the design and assessment of ship structure evaluation of intact and damaged stability and arrangements during design and construction phases of acquisition conversion and overhaul. He is currently involved in systems engineering and integration. Recent responsibilities have included requirements analyses and feasibility studies interface analyses and computer aided analyses. He received his B.S. in naval architecture and marine engineering from Webb Institute of Naval Architecture in 1982 (as an ASNE scholar) and is currently an M.S. candidate in systems engineering at the University of Virginia. Alfred Skolnickserved over 30 years as an engineering duty officer and retired from the Navy with the rank of captain in 1983. His early assignments included tactical missile engineering shipboard duty and Polaris submarine inertial navigation. He later served in the Deep Submergence Systems Project was project director surface effect ships (SES) David Taylor Model Basin director of technology Joint Navy-Commerce SES Program director combat systems Naval Sea Systems Command and project manager directed energy weapons. His awards include the Navy League's Parsons Award in 1979 for scientific and technical progress ASNE's Gold Medal in 1981 for high energy laser development the Navy Legion of Merit in 1983 National Capital Engineer of the Year in 1986 and the American Defense Preparedness Association Gold Medal in 1988 for contributions to strategic defense. He was president of ASNE from 1985–1989. He received his B.S. in mathematics from Queens College his M.A. in mathematics from Columbia University his M.S. in electrical engineering from U.S. Naval Postgraduate School and his Ph.D. in electrical engineering/applied mathematics from Polytechnic University. He w

Changing threat requirements and radical budget shifts imply that Navy operational needs will broaden and engineering solutions will face tougher constraints. Existing and emerging technology promise increased combat capability in smaller packages;space-based assets will allow operator orchestration of widely dispersed naval units via connectivity attributes previously unavailable. Tactical data relay by downlink may permit reallocation of responsibilities among several platforms, space, air, or seaborne, so ships can be outfitted for custom-use (sensing, unique data processing, high-firepower) and optimized to meet specific mission needs. These evolving capabilities demand a fresh look at ship concepts and prospective force structures consistent with global and fiscal realities. Warfighting performance formerly unknown in small ship design may offer a very effective solution to the intricate, interacting issues of falling defense budgets, diverse operational requirements and complex national priorities. Multimission ships which take advantage of new or current technology to reduce ship size, manning and cost could be affordable in sufficient numbers to meet our continuing worldwide obligations, complement our larger ships' force structure, and produce a balanced fleet. These same ships could satisfy U.S. maritime needs beyond the Navy and improve export trade through foreign military sales (FMS).

关键词： Naval Warfare

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NTDS - A PAGE IN NAVAL HISTORY

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NAVAL ENGINEERS JOURNAL 1988年第3期100卷 53-61页

作者： SWENSON, EN MAHINSKE, EB STOUTENBURGH, JS Capt. Erick N. Swenson USNR (Ret.):is a project manager for special projects in the Surface Ship Systems Division Hughes Aircraft Company Fullerton Calif where he has been employed since his retirement from the U.S. Navy in 1975. Originally trained as an electronics technician during WWII in the Captain Eddy program he later received a BS degree in electrical engineering from the University of Rochester Rochester N. Y. in 1950. Subsequent engineering education was received at the University of Pittsburgh Pittsburgh Penn. and the Naval Postgraduate School Monterey Calif. After commissioning he was ordered to duty as the electronics division officer on the USSMissouri(BB-63) and electronics ships superintendent at Hunters Point Naval Shipyard San Francisco Calif. When the design of the Naval Tactical Data System began in the mid-1950s Lt. (j.g.) Swenson was ordered to the Bureau of Ships Navy Department Washington D.C. as the junior engineering duty only officer assigned to the project. From 1962 to 1965 LCdr. Swenson was assigned as the BuShips technical representative on the program at Remington Rand Univac St. Paul Minn. For the next ten years he returned to BuShips/NavSea/NAVSEC as the NTDS project officer. During this time the project expanded considerably foreign military sales were heavily involved and interoperability with other services and countries were established. His final effort on active duty was to instigate the redesign of the previousSpruanceclass destroyers into the newerAdmiral Kiddclass improvement program. He is a registered professional electrical engineer in the State of California listed inWho's Who in the Worldis a life member of ASNE and chairman of the Long Beach/Greater LA Section. Capt. Edmund B. Mahinske USN (Ret.):is an alumnus of the U.S. Naval Academy the Massachusetts Institute of Technology and the Harvard Business School. His technical background is in electronics and he specialized in the management of programs involving the application of comp

A little over thirty years ago, a group of naval engineers were assembled by the Bureau of Ships to develop a new system approach to the combat information center (CIC). The CIC of World War II, with its “grease pencil” plots and voice telling of tactical information from sensors and other ships, could no longer provide the timely, coordinated reaction to postwar threats. This project group led the Navy into the new world of large-scale, high-speed digital electronics and into a new mode of conducting naval warfare as well. There were no off-the-shelf computers of the requisite capability, size and reliability; what were available were monstrous vacuum tube computers. There were no display equipments that were “conversant” in both the digital language of the computer and the analog language of the sensors and the weapon systems. Who ever heard, at that time, of a computer running a tactical communication net automatically? It was hard enough to find sufficient numbers of engineers who knew what a digital computer was. This paper, by three naval engineers in the implementing engineering office, depicts the evolvement of the Naval Tactical Data Systems (NTDS) as they saw it. It discusses the problems that stemmed from the transition from the old world of analog into the new digital world, the system concepts that steered the development; the key decisions that were made; new electronic equipment and processes that became necessary; and the need of the mangagement to face the real world of deadlines, ship schedules and operational requirements.

关键词： NAVAL WARFARE

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