作者：
WEEMS, P.V.H.BENFIELD, CHARLES W.USN (Ret.)Captain Phillip Van Horn Weems
USN Retired is the co-founder of the American Institute of Navigation a man whose name is referenced nine times in the index of “Bowditch” hardly needs an introduction in a navigation journal. Captain Weems has been a rallying point and idea innovator in marine navigation for over half a century. He is chairman of the board and technical mentor of Weems System of Navigation Inc. internationally known supplier of courses books instruments and charts at Annapolis Maryland. Captain Weems' books and inventions may be found in the chart room of nearly every English speaking country's vessels as well as those of many other nations. He has recently devoted enthusiastic attention to improving the accuracy and convenience of the navigator's tools by applying some of the advances of modern aerospace and electronics technology. Born in Montgomery County Tennessee 29 March 1889 he was graduated from the U.S. Navy Academy in 1912. His honors and awards include: Bronze Star Gold Medal Aero Club of France Royal Society of Arts Award for second setting watch Magellanic Premium from American Philosophical Society Gold Medal from British Institute of Navigation and Thurlow Award American Institute of Navigation. He holds seven patents in navigation and has written many textbooks and papers. He was on the 1920 Olympic Wrestling team as well as being a former All American Team member after his accomplishments on the Navy football team. Charles W. Benfield is a Senior Development Engineer in the Systems section of Honeywell's Aero Division Florida facility at St. Petersburg. He received his degree in Electrical Engineering at the University of Florida in 1948. A former regular navy man with six years sea duty and flying
he has been actively interested in the art of way finding for over 20 years. Presently he is actively working to apply the company's capabilities to automation of the marine navigation process but he also has been active in studies of manual space navig
作者：
BATTIN, WILLIAM J.THE AUTHOR: received a BSEE from Swarthmore College in 1950
MSME from Princeton in 1955 and Ph.D. from University of Illinois in 1963. He has taught Mechanical Engineering subjects at Clarkson College and The University of Illinois and is now a professor in the Engineering Department at the United States Naval Academy where his principal interest is application of digital computers to process control systems. During sabbatical leave last year he was Visiting Professor at Cambridge University.
Challenged by urbanization and increasing travel needs, existing transportation systems need new mobility paradigms. In this article, we present the emerging concept of autonomous mobility-on-demand, whereby centrally...
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Challenged by urbanization and increasing travel needs, existing transportation systems need new mobility paradigms. In this article, we present the emerging concept of autonomous mobility-on-demand, whereby centrally orchestrated fleets of autonomous vehicles provide mobility service to customers. We provide a comprehensive review of methods and tools to model and solve problems related to autonomous mobility-on-demand systems. Specifically, we first identify problem settings for their analysis and control, from both operational and planning perspectives. We then review modeling aspects, including transportation networks, transportation demand, congestion, operational constraints, and interactions with existing infrastructure. Thereafter, we provide a systematic analysis of existing solution methods and performance metrics, highlighting trends and trade-offs. Finally, we present various directions for further research.
Topics on CO2 sequestration and reduction in greenhouse gas emissions from processengineering and materials for clean energy are covered. Papers addressing sustainable technologies in extractive metallurgy, materials...
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ISBN:
(数字)9783319481821
ISBN:
(纸本)9783319486192
Topics on CO2 sequestration and reduction in greenhouse gas emissions from processengineering and materials for clean energy are covered. Papers addressing sustainable technologies in extractive metallurgy, materials processing and manufacturing industries with reduced energy consumption and CO2 emission are also included, as well as industrial energy efficient technologies including innovative ore beneficiation, smelting technologies, recycling and waste heat recovery. The book also carries contributions from all areas of non-nuclear and non-traditional energy sources, including renewable energy sources such as solar, wind, biomass, etc. The book also emphasizes novel mineral beneficiation, processing, and extraction techniques leading to waste minimization of critical rare-earth materials used in energy systems (e.g., magnets, display and lighting devices).
The paper reviews the present state of development of a new form of replenishment-at-sea system, for use in Sea State 6 conditions, being developed jointly by G.E.C. (processengineering) Ltd. and the Ministry of Defe...
The paper reviews the present state of development of a new form of replenishment-at-sea system, for use in Sea State 6 conditions, being developed jointly by G.E.C. (processengineering) Ltd. and the Ministry of Defense (Naval). The theoretical principles behind the new system are described in some detail and the essential control relationships are presented. A variety of analogue computer outputs contrasting the behavior of the new system as compared to constant tension systems, are discussed and illustrated. A fundamental objective in evolving the control philosophy for the new system has been to eliminate the oscillatory tendency present in a constant tension system. This tendency is discussed and the reasons for it determined. It is shown that a system in which control is based only on tension measurement is fundamentally unsatisfactory in the sense that it cannot meet in an adequate manner the various requirements of an R.A.S. System designed to work in rough sea conditions. The reasons for this state of affairs are described. A table comparing performance of existing Royal Navy systems with the new system is presented. The prototype hardware being built for sea trials in the late summer of 1970 is described and illustrated.
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