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6th IEEE Workshop on Local and Metropolitan Area Networks, LANMAN 1993

作者： Calvo, Eduard Palomar, Daniel P. Fonollosa, Javier Rodríguez Vidal, Josep Department of Production Technology and Operations Management IESE Business School University of Navarra Barcelona Spain Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Barcelona Spain

The computation of the channel capacity of discrete memoryless channels is a convex problem that can be efficiently solved using the Arimoto-Blahut (AB) iterative algorithm. However, the extension of this algorithm to the computation of capacity regions of multiterminal networks is not straightforward since it gives rise to non-convex problems. In this context, the AB algorithm has only been successfully extended to the calculation of the sum-capacity of the discrete memoryless multiple-access channel (DMAC). Thus, the computation of the whole capacity region still requires the use of computationally demanding search methods. In this paper, we first give an alternative reformulation of the capacity region of the DMAC which condenses all the nonconvexities of the problem into a single rank-one constraint. Then, we propose efficient methods to compute outer and inner bounds on the capacity region of the two-user DMAC by solving a relaxed version of the problem and projecting its solution onto the original feasible set. Targeting numerical results, we first take a randomization approach. Focusing on analytical results, we study projection via minimum divergence, which amounts to the marginalization of the relaxed solution. In this case we derive sufficient conditions and necessary and sufficient conditions for the bounds to be tight. Furthermore, we are able to show that the class of channels for which the marginalization bounds match exactly the capacity region includes all the two-user binaryinput deterministic DMACs as well as other non-deterministic channels. In general, however, both methods are able to compute very tight bounds as shown for various examples. © 2010 IEEE.

关键词： Iterative methods

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AUTOMATED LOGISTICS FOR HM-AND-E SYSTEMS

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NAVAL ENGINEERS JOURNAL 1993年第5期105卷 50-58页

作者： CIERI, AM The Author:is the director Equipment Assessment and Alteration Department Naval Ship Systems Engineering Station (NavSSES). His department is responsible for implementing condition-based maintenance initiatives at NavSSES and for program management engineering development and measurement of efficiency and effectiveness for the Assessment of Equipment Condition (AEC) Program as the agent for NavSea 915. Additionally his department manages both machinery alterations (MachAlts) for NavSea 56 and numerous ship alterations (ShipAlts) for the type commanders. In 1983 he conceived and structured the policy and procedures for the MachAlt Program at NavSSES as a result of a need identified by NavSea's ShipAlt Improvement Program. He served as the program manager for the MachAlt Program from 1982 until his current promotion this year. Mr. Cieri worked in the Hull and Deck Machinery Department for 11 years before moving into program management. His 29 years of federal service also include nine years with the Philadelphia Naval Shipyard in increasingly responsible positions in both the Planning and Production departments. Mr. Cieri is a former recipient of the NavSSES Joseph Cacciola Technical Achievement Award and the Federal Government Economy in Government Operations Award for the Philadelphia area.

Shipboard and shoreside maintenance managers throughout the Navy are searching for innovative ways to improve the processes used to maintain shipboard equipment. The current fiscal environment and events in the world make it evident that the Navy of the twenty-first century will have to do more with less. The author believes that the application of existing technology can automate and integrate diagnostics (what is wrong and a recommended corrective action) with the logistic requirements (how to document and effect the corrective action). The author will discuss and demonstrate a real-time application of automated diagnostics with CALS compliant logistics for an HM&E system for use by both shipboard and shoreside maintenance managers. The primary functions will center around data collection and work brokerage. The paper will focus on features and capabilities that will automate logistics including: SNAP/CSMP Interface (automated 2-kilos), Tech Manuals/EOSS/PMS, Ships Force Training, Embedded Training, Tools/Parts Information, Maintenance Scheduling, Drawings/Blue Prints, and MachAlt/ShipAlt management.

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VIRTUAL PROTOTYPING USING KNOWLEDGE - BASED MODELING AND SIMULATION TECHNIQUES

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NAVAL ENGINEERS JOURNAL 1993年第3期105卷 201-212页

作者： SHEA, JG The Author:holds bachelor and master of engineering degrees in mechanical engineering a M.Eng. in engineering management and is currently fulfilling requirements for the M.S. and Ph.D. degrees in computer science at the University of Louisville. He is employed as program manager Phalanx Advanced Engineering Development at the Naval Ordnance Station Crane Div. NavSurfWarCen Louisville Ky. During his tenure with Phalanx Mr. Shea has contributed to system reliability improvement system performance upgrading and the development of the Phalanx HOL (RISC) Computer. Mr. Shea is a member of ASNE the Institute of Electrical and Electronics Engineers American Institute of Aeronautics and Astronautics Society for Computer Simulation International Test & Evaluation Association and the Military Operations Research Society.

Knowledge-based modeling and simulation bridges the gap between ''conventional'' artificial intelligence implementations (such as expert systems) and more traditional computer-aided design techniques. We are currently developing software, whose primary function is to capture a user-input design specification and produce a ''virtual'' rapid prototvpe in the form of executable rule-based code. This code can then be exercised either as an interactive part of a hardware-in-the-loop testbed simulator or as a component of an object-oriented ''behavioral'' simulation environment. While the Phalanx Testbed is the immediate beneficiary of this work, the techniques described have a wide range of application in the modeling of conceptual design and performance characteristics. This paper describes the system architecture and software tools that we are applying to generate virtual rapid prototypes for use in the Phalanx Testbed. Particular attention is paid to defining the intelligent knowledge-capture mechanisms and model generation methodologies that we are using to translate design knowledge and performance requirements into rule-based simulations. The object-oriented programming approach to the merging of ''new'' data with previouslv-captured and stored data is discussed, and the issues of verifying and validating prototypes generated using such partiallv ''reengineered'' models are examined. An application currently in use as an investigative prototype for testbed development, a simple position controller servomechanism used to control the azimuth angle of a target-tracking sensor, is used to illustrate the process.

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NAVY HIGH-ENERGY LASER-WEAPON SYSTEM

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NAVAL ENGINEERS JOURNAL 1993年第3期105卷 105-117页

作者： FERREIRA, DM MARCELL, FC David M. Ferreira:is the program manager for high power microwave and laser applications and the exploratory development technology block program manager for laser technology and high power microwave technology in the Directed Energy Program at the Space and Naval Warfare Systems Command (SpaWar). His 20 years experience includes project engineer for shipboard infrared countermeasures and advanced development infrared decoys at the Naval Ship Engineering Center. project engineer for advanced development infrared search and track systems in the Reconnaissance Electronic Warfare and Special Operations Navy (REWSON) Project Office Naval Electronic Systems Command HEL beam control manager in the High Energy Laser Project Naval Sea Systems Command and System Engineering Division director Naval Warfare System Architecture and Engineering Directorate Space and Naval Warfare Systems Command. His current position is manager of high power microwave and laser applications in the Directed Energy Weapons Division of SpaWar. Mr. Ferreira holds an AA from City College of San Francisco a BS(EE) from the University of Colorado and an MBA from George Mason University. Frederick C. Marcell:is the leader Electro-Optics Systems Space and Defense Systems Group W. J. Schafer Associates (WJSA) Washington Operations. With more than 15 years experience in electro-optic sensors and laser technology development he is responsible for Navy SDIO and other industry programs in the laser radar and electro-optic sensor business areas. He provides scientific engineering and program management support to government and industry in technology assessment and system development programs. Mr. Marcell came to WJSA following 27 years of naval service in both sea and technical billets. As an engineering duty officer he served in technical program management positions at the Naval Surface Warfare Center working on the ANISAR-8 IRST and at The Navy Directed Energy Weapons Program Office working on the High Energy Laser and managing the SDIO

This paper will historically review and describe the Navy High Energy Laser Weapon System (HELWS). Advances in anti-ship cruise missiles (ASMs), which present the greatest challenge in surface ship self defense, are necessitating the development of significantly more sophisticated and expensive surface-to-air missiles in order to counter the threat. The next generation of ASMs, as represented by the French ANS, will be capable of skimming only meters above the sea surface at multi-mach speeds, while performing evasive maneuvers during terminal run-in. This type of threat has essentially eliminated naval gun systems from the role of ship self-defense, and has significantly reduced the effectiveness of cu''ent missile systems. Under development for the past twenty years, the High Energy Chemical Laser appears to be a feasible solution to the ship self-defense problem. Capable of operating effectively in all weather conditions except dense fog, a HELWS requires no conventional rire control solution, since it operates at the speed of light. Any target that can be tracked can be enpged. Furthermore, once the beam director is locked onto a target, the system is insensitive to target maneuvers. By tailoring the lase period to the threat, the effective P(k) of an HELWS is essentially 1. Using chemical energy as a primary power source removes the requirement for additional costly and heavy power generation equipment aboard ship. In the context of the foregoing arguments, cost per kill becomes a fraction of the cost of a two-round missile salvo. The technology required to field a shipboard HELWS has been demonstrated by the Navy Mid-InfraRed Advanced Chemical Laser (MIRACL) and the Sea Lite Beam Director (SLBD). Its success in bringing down a Mach 2.2 Vandal missile in 1989 was dramatic proof of the effectiveness of such a system. Recent studies have shown that the MIRACL/SLBD can be repackaged as a HELWS to fit into the equivalent volume occupied by a 5''154 Mk 45 gun mount

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HIERARCHICAL production PLANNING AND MULTIECHELON INVENTORY management

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INTERNATIONAL JOURNAL OF production ECONOMICS 1992年第1-3期26卷 257-264页

作者： ZIJM, WHM University of Twente Department of Mechanical Engineering Laboratory of Production Management and Operations Research P.O. Box 217 7500AE Enschede The Netherlands

In this paper we present a framework for the planning and control of the materials flow in a multi-item production system. Our prime objective is to meet a prespecified customer service level at minimum overall costs. In order to motivate our study we first outline the basic architecture of a logistic control system developed at Philips Electronics. Guided by this exposure, we next describe the basic algorithmic framework which is needed to turn the conceptual ideas into operational procedures. The theory is extended with hierarchical planning procedures recognizing the need to first plan on a product family level before disaggregating into plans for end-items.

关键词： production Control

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Document-driven management of knowledge and technology transfer: Denmark's CIM/GEMS project in computer-integrated manufacturing--Part 2

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IEEE Transactions on Professional Communications 1992年第2期35卷 71-83页

作者： McDaniel, Ellen Young, Robert E. Vesterager, Johan Engineering Computer Operations College of Engineering North Carolina State University Raleigh NC USA Department of Industrial Engineering North Carolina State University Raleigh NC USA Institute of Production Management and Industrial Engineering Technical University of Denmark Lyngby Denmark

This article is the second of two articles (see E. McDaniel et al., IEEE Transactions on Professional Communication, vol. 34, no. 2, pp. 83-93 June 1991) discussing ways to create system documentation and use it to drive and manage technical development in technology-transfer projects. The authors again explore the two-year Danish CIM/GEMS project in computer-integrated manufacturing (CIM) at the Technical University of Denmark to show how writing is an act of technology and knowledge representation, a vehicle of their transfer to a user community, and, if successful, an accommodation of technology to its users. They address creators and users of system documentation who need documentation for CIM implementation. The authors argue that documentation is often better for representing and explaining a CIM system than the actual system itself, and they recommend that documentation production be viewed not as a separate, end-of-project activity but as an integrated part of technical development. Planned and regular documentation production can in fact be a stimulus and aid to technical development, possibly even shortening the project life cycle.

关键词： Information Dissemination

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AUTOMATED MAINTENANCE management FOR SMALL CRAFT

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NAVAL ENGINEERS JOURNAL 1992年第5期104卷 52-56页

作者： SETEROFF, SS VANHOOK, KC Sviatoslav Steve Seteroffholds a master of business administration degree from the University of Puget Sound and served in the United States Navy for more than 29 years. The last nine years were involved with service and small craft including operational maintenance administrative and training responsibilities within the United States and overseas. After leaving active duty Mr. Seteroff was involved in defining requirements to apply the U.S. Navy SNAP II program to Trident submarines incorporating SNAP I Intermediate Maintenance Management System—Real Time (IMMS-RT) processes into the OpNav 4790 procedures and supervised SNAP II hardware installations in the Pacific Fleet. He has conducted work estimating and cost estimating training at three naval shipyards and availability re-estimating tasks for the Navy Industrial Improvement Program and served as a project manager for information systems and logistics. Mr. Seteroff is currently the principal of Management & Logistics Associates providing professional services and analys to government and industry in the areas of management information systems logistics support analysis and integrated logistics support and is developing a logistics support analysis record data base application called LDS2B. Keith C. Van Hookserved for 27 years in the Naval Nuclear Propulsion Program specializing in submarine repair and quality assurance. He acted as a technical representative for the Department of Energy Division of Naval Reactors at Newport News Shipbuilding and Norfolk Naval Shipyard. Other assignments included production management assistant on board USSEmory S. Land (AS-39) and quality assurance officer at Trident Refit Facility Bangor Washington. After leaving active duty as a limited duty officer in 1989 he was a senior operations analyst for Merit Systems Inc. of Bremerton Washington consulting on marine maintenance management and shipyard management issues. He has conducted planning and estimating training and availability re-estimating services at

This paper deals with the need for a coordinated effort to develop a uniform, readily available PC-based maintenance management program for commands employing small craft in the execution of their mission. Included are: A discussion of the maintenance management problem as it applies to small craft. An evaluation of necessary capabilities of such a program by comparison with two existing programs which can currently satisfy some of these requirements. A review of the hardware, software and support requirements necessary to implement and maintain such a system. The importance of a coordinated and deliberate effort to standardize the essential elements of the program.

关键词： Maintenance

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Concepts and attributes of total quality management

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Total Quality management 1991年第1期2卷 75-98页

作者： Elshennawy, Ahmad K. Maytubby, Venetta J. Department of Industrial Engineering and Managentent Systems University of Central Florida Orlando Florida 32816 United States Department of Production Operations & Management California State University Smnislaus Turlock California 95380 United States

For the last decade, American companies have beenplayingcatch-up in the area of quality andproductivity. Japanese companies and other foreign competitors have moved into markets that were once dominated by American companies, by producing higher quality products. The problem to date in the US has obviously not been the lack of resources or documentation on quality and improvement programmes, but the misdirection of these programmes and the lack of total management commitment. Total Quality management (TQM) isseen as an effective method that will accomplish the task of higher quality levels, andincreased productivity. The purpose of Total Quality management is to implement a process that is long term and continuous improvement initiatives throughout the organization, beginning with their own function in the organization. TQM integrates the fundamental techniques and principles of Quality Function Deployment, Taguchi Methods, Staristical Process control, Just-ln-Time, and existing management tools into a structured approach. The primary objective of this approach is to incorporate quality and integrity into all functions at all levels of the organization. This paper examines the TQMprocess, philosophy, concepts, attributes and how it can be used to develop a 'quality-bared' culture in which everyone in the organization is involved. © 1991 Taylor & Francis Group, LLC. All rights reserved.

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EVALUATING THE EFFECTIVENESS OF GROUND-WATER EXTRACTION SYSTEMS

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GROUND WATER MONITORING AND REMEDIATION 1991年第1期11卷 119-124页

作者： HALEY, JL HANSON, B ENFIELD, C GLASS, J Jennifer Haley is a chemical engineer working in the Remedial Operations and Guidance Branch of the Hazardous Site Control Division/Office of Emergency and Remedial Response (U.S. EPA OS-220 401 M St. SW Washington D.C. 20460). One of her responsibilities during her three years at EPA has been completion of the EPA Guidance on Remedial Actions for Contaminated Ground Water at Superfund Sites. Prior to taking her current position at the EPA in May 1987 she worked for two years for the California Regional Water Quality Control Board overseeing ground water contamination investigations and cleanups in the South San Francisco Bay. She received a B.S. in chemical engineering from the University of California in Berkeley and an M.S. in environmental management from the University of San Francisco. Bill Hanson is an engineer with the U.S. Environmental Protection Agency (OS-220 401 M St. SW Washington D.C. 20460). He received both his B.S. in engineering and M.A. in environmental engineering from Duke University. Before joining the Environmental Protection Agency Hanson worked for several consulting engineering firms including CH2M Hill in Res ton Virginia. At EPA he first worked in the Effluent Guidelines Program where he was responsible for developing pretreatment and direct discharge regulations for the electroplating industry. Hanson has been with the Superfund program since its start. He is currently chief of the Remedial Operations and Guidance Branch. His branch is responsible for developing guidance for consistency of approach with respect to selection of remedy land ban treatment requirements and treatability protocols. Carl G. Enfield is a soil scientist at the Robert S. Ken Environmental Research Laboratory (U.S. EPA Office of Research and Development P.O. Box 1198 Ada OK 74820). He earned his B.S.C.E. in civil engineering and M.S. in agronomy at Purdue University and his Ph.D. in agricultural chemistry and soils at the University of Arizona. He currently serves as research director at EP

The most common process for remediating contaminated ground water is extraction and treatment. Data from 19 on-going and completed ground water extraction systems were collected and analyzed (U.S. EPA 1989b) to evaluate the effectiveness of this process in achieving cleanup concentration goals for ground water. This analysis indicated several trends including (1) containment of ground water plumes was usually achieved;(2) contaminant concentrations dropped significantly initially followed by a leveling out;(3) after the period of initial rapid decline, the continued decreases in concentration were usually slower than anticipated;and (4) certain data important to optimizing system design and operation had often not been collected during the site characterization phase. Factors limiting the achievement of cleanup concentration goals fell into four basic categories: (1) hydrogeological factors, such as subsurface heterogeneity, low-permeability units, and presence of fractures;(2) contaminant-related factors, such as high sorption to soil and presence of non-aqueous phases (dissolution from a separate non-aqueous phases (dissolution from a separate non-aqueous phase or partitioning of contaminants from the residual non-aqueous phase);(3) continued migration from source areas and the size of the plume itself;and (4) system design factors, such as pumping rates, screened intervals, and extraction well locations. The findings of this study indicate that ground water extraction is an effective method for preventing additional migration of contaminant plumes and achieving risk reduction. However, the findings indicate that in many situations, it may not be practicable to rely solely on ground water extraction and treatment to achieve health-based cleanup concentrations throughout the contaminated zone and fulfill the primary goal of returning ground water to beneficial use. This study suggests several recommendations (U.S. EPA 1989a) for improving ground water response acti

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THE NEW ROAD - OCEAN AND NAVAL engineering IN THE 1990S

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NAVAL ENGINEERS JOURNAL 1991年第1期103卷 75-78页

作者： BALES, SML Susan Bales is the science advisor to the chief of naval operations and the assistant director for science and technology of the CNO Executive Panel. She is on assignment from the Office of Naval Research where she holds the position of assistant director for program support and special programs. Previously she was head of the Ocean Environment Group at David Taylor Research Center. Among her fields of technical expertise are radio-electronic battle management/space and electronic combat naval oceanography coastal dynamics ship engineering hydrodynamics technology wargaming climatology and the Arctic. Since joining the CNO's staff in 1987 Ms. Bales has participated in a number of strategic long-range planning efforts including the 1990 Defense Science Board Summer Study. She has been active in international exchange agreements coordinating the 1987 Labrador Extreme Waves Experiment (LEWEX) and chairing a NATO Research Study Group. She has lectured at the Massachusetts Institute of Technology Webb Institute of Naval Architecture the NATO ASW SACLANT Centre the Admiralty Marine Technology Establishment and the Royal Netherlands Meteorological Institute. Active in a number of professional societies Ms. Bales has served as vice president of the American Society of Naval Engineers (ASNE) and chaired the Naval Engineers Journal Committee. Her research has been published in more than 50 papers articles and reports both here and abroad. She has received the Navy Meritorious Civilian Service Medal was named the 1988 National Capital Senior Engineer of the Year by the D.C. Council of Engineering and Architectural Societies and was elected to membership in the COSMOS Club in 1989. She was married to the late Nathan K. Bales and resides in Myersville Md.

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