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Shipping U.S. Agricultural Products to Vietnam.

作者:科技文献资料网 时间:2017-07-25 12:28:33  浏览:8623   来源:科技文献资料网
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[文献类型]:科技报告
[标题]:Shipping U.S. Agricultural Products to Vietnam.
[作者]:J. Caron; R. Kreamer; H. Reichert;
[机构]:Agricultural Marketing Service, Washington, DC. Transportation and Marketing Div.
[关键词]:agricultural products,shipping,vietnam,agricultural economics,imports, exports, marine transportation, cargo transportation, marketing, costs, businesses,
[出版年份]:2008
[报告时间]:2001,
[页码]:8p
[馆藏索取号]:PB2008109975
[总页数]:8


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[唯一标识符]:CDSITC.AEROSPACE.A94-36849
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1994-36849; Reference AN: A94-36849
[标题]:Optimum low-thrust manoeuvres in a noncentral gravity field
[作者]:da Silva Fernandes Sandro
[书名]:IN: Spaceflight dynamics 1993; Proceedings of the AAS/NASA International Symposium, Greenbelt, MD, Apr. 26-30, 1993 (A94-36759 12-13), San Diego, CA, Univelt, Inc. (Advances in the Astronautical Sciences. Vol. 84, pt. 2), 1993, p. 1339-1353
[文摘]:A complete first order analytical solution is developed for the problem of optimal low-thrust limited power transfers between neighboring quasi-circular orbits in a noncentral gravity field generated by an ellipsoid. The optimization problem is formulated as a Mayer problem of optimal control with Cartesian elements as state variables. After applying the Pontryagin Maximum Principle and determining the optimal thrust acceleration, successive canonical transformations are performed: the Cartesian elements are changed by suitable orbital elements. Hori's method is applied in solving the new canonical systems which govern the optimal trajectories. (Author)
[关键词]:SPACECRAFT MANEUVERS; LOW THRUST; GRAVITATIONAL FIELDS; FLIGHT OPTIMIZATION; TRAJECTORY CONTROL; TRAJECTORY OPTIMIZATION; ELLIPSOIDS ; OPTIMAL CONTROL; PONTRYAGIN PRINCIPLE; CANONICAL FORMS
[出版年份]:1993
[专业领域]:ASTRODYNAMICS
[唯一标识符]:CDSTIC.ISTP.703030
[文献来源]:科学技术会议录索引(ISTP)
[文献类型]:科技会议
[标题]:INITIAL ROTOR POSITION ESTIMATION FOR SURFACE PERMANENT-MAGNET SYNCHRONOUS MOTOR
[作者]:K TANAKA;T YUZAWA;R MORIYAMA;I MIKI
[出版单位]:INT ACAD PUBL BEIJING WORLD PUBL CORPBEIJING
[ISSN_ISBN]:7-5062-5115-9
[会议名称]:5th International Conference on Electrical Machines and Systems,SHENYANG, PEOPLES R CHIN,August 18-20, 2001
[来源]:ICEMS'2001: PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS, VOLS I AND II,pp 824-827
[编辑者]:EFX Wang;RY Tang
[主办单位]:China Electrotech Soc;China Harbin Power Plant Equipment Grp Corp;Chinese Soc Elect Engn;Harbin Inst Technol;IEEE Ind Appl Soc;Liaoning Soc Elect Engn;Natl Nat Sci Fdn China;Shenyand Univ Technol
[地址]:K TANAKA,MEIJI_UNIV, TAMA KU, 1-1-1 HIGASHI MITA, KAWASAKI, KANAGAWA 214857, JAPAN
[专业领域]:ENGINEERING, ELECTRICAL & ELECTRONIC,ENGINEERING, MECHANICAL,AUTOMATION & CONTROL SYSTEMS,ENGINEERING, INDUSTRIAL

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