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Minimizing waiting times in a route design problem with multiple use of a single vehicle

Electronic Notes in Discrete Mathematics 2013年 41卷 269-276页

作者： Angel-Bello, Francisco Martínez-Salazar, Iris Alvarez, Ada Department of Industrial and Systems Engineering Tecnológico de Monterrey Monterrey Nuevo León Mexico Graduated Program in Systems Engineering Universidad Autónoma de Nuevo León Monterrey Nuevo León Mexico

In this study we introduce a routing problem with multiple use of a single vehicle and service time in demand points (clients) with the aim of minimizing the sum of clients waiting time to receive service. This problem is relevant in the distribution of aid, in disaster stricken communities, in the recollection and/or delivery of perishable goods and personnel transportation, among other situations, where reaching clients to perform service, fast and fair, is a priority. We consider vehicle capacity and travel distance constraints which force multiple use of the vehicle in the planning horizon. This paper presents and compares two mixed integer formulations for this problem, based on a multi-level network. © 2013 Elsevier B.V.

关键词： Mixed integer model Multi trip vehicle routing problems Routing for relief Total Latency

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Time-dependent formulations for minimizing total completion time in a parallel machine scheduling problem with dependent setup times

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IFAC-PapersOnLine 2016年第12期49卷 857-862页

作者： Baez, Sarahi Angel-Bello, Francisco Alvarez, Ada Tecnológico de Monterrey Ph.D. Program in Engineering Sciences Monterrey Mexico Tecnológico de Monterrey School of Science and Engineering MonterreyNuevo León Mexico Universidad Autónoma de Nuevo León Graduated Program in Systems Engineering San Nicolás de los Garza Nuevo León Mexico

In this work two formulations for minimizing the total completion time a parallel machine scheduling problem with dependent set up times are proposed. They are developed from formulations for the same problem for a single machine environment and showed have a better performance than a formulation based on m-Traveling Salesmen Problem, consuming less computational time on instances of the same size and allow solving to optimality more than five times larger data instances. © 2016

关键词： Scheduling algorithms Machinery Scheduling Computational time Parallel machine scheduling Parallel machine scheduling problems Set up time Single machines Time dependent Total completion time Traveling salesman

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Memetic algorithms for solving a bi-objective Transportation Location Routing Problem

Memetic algorithms for solving a bi-objective Transportation...

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IIE Annual Conference and Expo 2014

作者： Martínez-Salazar, Iris Molina, Julián Caballero, Rafael Ángel-Bello, Francisco Universidad Autónoma de Nuevo León Graduated Program in Systems Engineering Nuevo León Mexico University of Malaga Faculty of Economics Malaga Spain Tecnológico de Monterrey Department of Industrial and Systems Engineering Nuevo León Mexico

ISBN: (纸本)9780983762430

In this work we propose two memetic algorithms based on a Nondominated Sorting Genetic Algorithm II (NSGA-II) scheme for solving a bi-objective Transportation Location Routing Problem (TLRP). The TLRP we are dealing with, can be seen as an extension of the two stage Location Routing Problem, with a transportation problem with truck capacity as first stage. Two objectives are considered: minimizing total distribution cost and balancing workload for drivers in the routing stage. The memetic algorithms we propose are attempts to reduce the typical intrinsic randomness of genetics methods. In the first memetic, instead of the classic mutation operator, a simple local search is implemented;in the second algorithm, a Tabu Search procedure with short term memory is used as mutation operator and the stop criterion is based on the quality of the solutions instead of a fixed number of generations. Computational Results shown that second algorithm is superior in four of the five performance measures applied.

关键词： Tabu search

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Impact point of probing rockets by telemetry and slant range 5

Impact point of probing rockets by telemetry and slant range

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5th International Symposium on Instrumentation systems, Circuits and Transducers, INSCIT 2021

作者： Cantanhede, Nilton Rodrigues Santana, Ewaldo Eder Carvalho Da Silva Junior, Paulo Fernandes De Jesus Barros, Jonas Freire, Raimundo Carlos Silverio State University of Maranhao Graduating Program in Engineering Computation and Systems São Luís Brazil Graduated in Mathematics The Federal University of Maranhão São Luís Brazil Federal University of Campina Grande Graduate Program in Electrical Engineering Campina Grande Brazil

ISBN: (纸本)9781728197265

In this work, is developing a method for obtaining the point of impact of a rocket by telemetry data and a Slant Range device. The trajectory data was obtained from a real flight path by merging the angular components of a telemetry antenna (azimuth and elevation) and the radial distance information provided by the Slant Range device. Position components were analyzed with the Telemetry antenna in automatic mode (in tracking), comparing with the tracking performance performed by the location radar. The result is obtained by the composition of the coordinates of the Telemetry-Slant Range set. A significant reduction in the search area can be used as an alternative form of use, providing additional location information for payload recovery around the actual point of impact. © 2021 IEEE.

关键词： Rockets

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Seeing through the fog - Attaining 'full spectrum dominance' with the system-of-systems through operational engineering

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NAVAL ENGINEERS JOURNAL 2000年第4期112卷 101-119页

作者： Bryant, RE Flynn, JE [?]1Russell Bryant is the leader for future decoy development in the Surface Electronic Warfare Systems Program Office Program Executive Office for Theater Surface Combatants. Previously he served as CVN Ship Life Cycle Manager in the Aircraft Carrier Program Office Naval Sea Systems Command. He is a retired reserve Lieutenant Commander with surface warfare nuclear power and naval control of shipping/convoy qualifications. He was commissioned 1976 from the Rensselaer Polytechnic Institute NROTC program with a bachelor of engineering degree in nuclear engineering and minor in history and political science. His active duty service includes USS Mississippi (CGN 40) USS South Carolina (CGN 37) USS Texas (CGN 39) Commander Naval Surface Force Atlantic Fleet (Readiness and Training) staff and Commander Naval Air Force Pacific Fleet (Ship's Material) staff. He graduated in 1997 from the Naval War College College of Naval Command and Staff through the Non-Resident Seminar Program. He graduated in 1998 from the USDA Graduate School Leadership Development Academy Executive Potential Program.

Many discussions and articles address the business and military changes supporting implementation of Joint Vision 2010 and its system-of-systems approach. The dynamics of international military operations and commitments, coupled with accelerating information technologies, can lead to confusion and uncertainty Customary rules recommend caution, even stopping, when confusion and uncertainty are present, yet the needed changes counsel toward accelerated efforts. Currently, systems engineering does not completely address delivering "operational war fighting capabilities," or foster commanders' confidence to fully exploit those capabilities upon delivery. Acquisition reform supports accelerating delivery of systems. likewise, accelerated delivery of "war fighting capabilities" within any opponents' fielding and deployment cycle is imperative. Technical advances in modeling and simulation, utilization concepts, and innovative evaluation methods create an opportunity to facilitate codevelopment of doctrine, operations, and training prior to producing hardware systems. On-line simulation and evaluation tools can overcome the need for physical systems. Specifically, this paper lays out the opportunity to evolve systems engineering to another level, operational engineering, which leverages from the modeling and simulation environment, prior to hardware production. That modeling and simulation paired with coevolution of procedures and on-line analysis will produce a trained customer base, fully prepared for deliveries of "operational war fighting capabilities".

关键词： Warships

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AUTOMATION OF PROPELLER INSPECTION AND FINISHING

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 124-131页

作者： STERN, H METZGER, R Howard K. Stern:is presently vice president of Robotic Vision Systems Inc. He received a bachelor of electrical engineering degree from College of the City of New York in 1960. Mr. Stern joined Dynell Electronics Corporation in 1971 and became part of the Robotic Vision Systems Inc. staff at the time of its spin-off from Dynell. He was program manager of the various three-dimensional sensing and replication systems constructed by Dynell and Robotic Vision Systems. As program manager his responsibilities encompassed technical administrative and operational areas. The first two portrait sculpture studio systems and the first three replication systems built by Robotic Vision Systems Inc. were designed manufactured and operated under his direction. Before joining Dynell Mr. Stern was a senior engineer at Instrument Systems Corporation and chief engineer of the Special Products Division of General Instrument Corporation. Prior to these positions Mr. Stern was chief engineer of Edo Commercial Corporation. At General Instrument and Edo Commercial he was responsible for the design and manufacture of military and commercial avionics equipment. Mr. Stern is presently responsible for directing the systems design and development for all of the company's programs. Robert J. Metzger:is currently engineering group leader at Robotic Vision Systems Inc. He graduated summa cum laude from the Cooper Union in 1972 with a bachelor of electrical engineering degree. Under sponsorship of a National Science Foundation graduate fellowship he graduated from the Massachusetts Institute of Technology in 1974 with the degrees of electrical engineer and master of science (electrical engineering). In 1979 Mr. Metzger graduated from Polytechnic Institute of New York with the degree of master of science (computer science). Since 1974 Mr. Metzger has been actively engaged in the design of systems and software for noncontact threedimensional optical measurement for both military and commercial applications. Of particular note are his c

Ship's propellers are currently measured by manual procedures using pitchometers, templates and gauges. This measurement process is extremely tedious, labor intensive and time consuming. In an effort to provide increased accuracy, repeatability and cost effectiveness in propeller manufacture, an automated propeller optical measurement system (APOMS) has been built which rapidly and automatically scans an entire ship's propeller using a 3-D vision sensor. This equipment is integrated with a propeller robotic automated templating system (PRATS) and the propeller optical finishing system (PROFS) which robotically template and grind the propeller to its final shape, using the APOMS-derived data for control feedback. The optical scanning and the final shape are both controlled by CAD/CAM data files describing the desired propeller shape. An automated propeller balancing system is incorporated into the PROFS equipment. The APOMS/PRATS/PROFS equipment is expected to provide lower propeller manufacturing costs.

关键词： PROPELLERS

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A Geographic Information System Application to Estimate the Weather-Dependent Power System Losses

A Geographic Information System Application to Estimate the ...

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IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC)

作者： Karen A. Villarreal Chaires Emilio Barocio Dunstano Del Puerto Flores Felix Rafael Segundo Sevilla Petr Korba Graduated program in electrical engineering Universidad de Guadalajara Guadalajara Jalisco México Electric Power Systems and Smart Grid Lab Zurich University of Applied Sciences ZHAW Winterthur Switzerland

ISBN: (纸本)9781665434287

The accuracy of weather-dependent power flow analysis for large interconnected systems can be significantly improved by including more electrical devices exposed to weather variables such as ambient temperature, wind speed and solar irradiance. The innovative part of the proposed approach is the combination of factors such as a voltage regulating transformer model, freely available weather data to feed the weather-dependent power flow algorithm, and a geographic visualization tool to display the results. To demonstrate the effectiveness of the proposed approach, the IEEE 118-bus system is used to analyze and compare the results of the weather-dependent power flow model versus a conventional power flow. In this case, it is used in the stationary analysis, the power flow temperature algorithms are performed in spatial visualization schemes. The results show that weather conditions directly affect the power system performance

关键词： Temperature sensors Temperature distribution Reactive power Wind speed Data visualization Transformers Data models

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NAVAL PROPULSION systems WATER-TREATMENT AND CONTROL

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 133-137页

作者： EICHINGER, BJ The Author is head of the Water Technology and Process Materials Section Naval Ship Systems Engineering Station (NAVSSES) in Philadelphia. She graduated from Marywood College in 1965 with a bachelor's degree in chemistry. Ms. Eichinger began her career with the Navy as an analytical chemist responsible for resolution of shipboard problems involving water water-formed deposits corrosion contamination and chemical cleaning. She with NAVSSES engineers corrected significant fleet problems arising from contaminants in submarine main hydraulic fluid systems and distillate fuel systems. Ms. Eichinger coordinated with the Naval Sea Systems Command to develop evaluate and implement the water treatment program now in use for all non-nuclear naval propulsion and auxiliary water and steam systems. She is a current member of the American Society of Mechanical Engineers and the author of the Naval Ships' Technical Manual chapter Boiler Water/Feedwater Test and Treatment.

The causes and effects of corrosion and contamination in conventional steam generator systems are described briefly. Treatment and control methodologies currently used by the Navy for feedwater, steam, condensate, and boiler water are detailed. Examples are cited of the manner in which Navy personnel are trained in interpretation of analytical data and in trend analysis in order that the ship can exercise preventive and corrective control of problems. Ancillary subjects discussed include chemical cleaning, mechanical cleaning, and out-of-service preservation. An overview of planned improvements is provided.

关键词： FEEDWATER TREATMENT

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Operating speed profiles and the ship design cycle

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NAVAL ENGINEERS JOURNAL 2005年第3期117卷 79-85页

作者： Surko, S Osborne, M CDR. Stephen W. Surko USN (ret.) is serving as a principal member of the technical staff of Noesis Inc. He graduated with distinction from the United States Naval Academy in 1982 with a bachelor of science in ocean engineering. Serving as a division officer aboard USS Elliot (DD 967) he enjoyed two WESTPAC deployments and qualified as a surface warfare officer. He completed postgraduate studies at the Massachusetts Institute of Technology in 1988 receiving master of science degrees in naval architecture and marine engineering and mechanical engineering. He earned his professional engineer's license in 1989. Subsequent tours of duty have included: personnel exchange program with Canada's Directorate General Maritime Engineering and Maintenance Philadelphia Naval Shipyard Naval Surface Warfare Center Carderock Division Ship Systems Engineering Station Naval Sea Systems Command Chief of Naval Operations Land Attack Warfare Division and Naval Surface Warfare Center Carderock Division. Steve Surko is an active member of the U.S. Naval Institute and ASNE

One key, but little documented and empirically supported, input in the ship design cycle is the expected operating speed profile. This real-world constraint affects many decisions regarding bull form and power systems, from fuel tanks to main propulsion and ship's service machinery selection and operation. These decisions, in turn, ripple through the design of a ship in ways that are often bard to discern, but clearly impact acquisition and life cycle costs. Recent studies of DDG 51 operating speed profiles demonstrate that the Navy regularly operates with speed profiles considerably different than used to design the ship. In general, warships operate in standard engine order telegraph increments (e.g., Ahead 2/3) and at lower speeds than designed for.

关键词： Ships

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COST-ANALYSIS OF OPTIONAL METHODS OF SHIPBOARD DOMESTIC WASTE-DISPOSAL

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NAVAL ENGINEERS JOURNAL 1973年第1期85卷 86-92页

作者： PIERSALL, CH BORGSTRO.RE USN CDR Charles H. Piersall Jr.USN graduated from the New York State Maritime College in 1956 with the Bachelor of Marine Engineer's Degree. He was designated Engineering Duty Officer (1400) in June 1958 and has had numerous engineering and industrial tours of duty. He has a Master's Degree in Mechanical Engineering from the Naval Postgraduate School (1965) and a Master's Degree in Business Administration (Systems Analysis) from the Defense Systems Analysis Program University of Rochester (1970). Upon completion of the latter he was ordered to The Center for Naval Analyses where he served as a cost analyst and shipbuilding/ship repair consultant. Additionally he was Project Officer for the Navy and the Environment Study. His present assignment is Director of Production Test and Integrated Logistic Support—LHA Project Naval Ship Systems Command. He is President of the CNA Sigma Xi Club and is active in the American Society of Naval Engineers. He has published articles in theASME Journal for PowertheJournal of the American Water Works Associationand theNaval Engineers Journal. Mr. Robert E. Borgstrom was graduated from the California State University at Northridge with a B.A. (1969) and an M.A. (1970) in Geography. He was Manager of Programming Services at the Laboratory for the Quantitative Analysis of Environmental and Spatial Systems and is presently with the Office of the Chief of Naval Operations assigned to the Center for Naval Analyses where his work has included studies of the Navy's program for environmental protection.

The problem of sewage and waste disposal from U. S. Navy ships is recognized by the highest authorities in the Navy. Many activities and individuals are deeply involved in the total problem and its numerous subcategories. The problem of costs of disposal is one of these. This paper discusses four optional methods for the disposal of shipboard domestic wastes. The annualized investment and operating costs associated with the implementation of each of the options are presented. The model considers non-nuclear, sea-going surface ships with a manning level greater than 50 men. Estimates were developed on a per ship per class basis and aggregated for the total surface fleet. This approach permits the inevstigation of different combinations of the options by merely specifying the number and type of ships to be considered in any option. Changes in military effectiveness, which is at least an equally important problem as costing, were not addressed.

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