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Dynamic Modelling and Response Characteristics of a Magnetic Bearing Rotor System Including Auxiliary Bearings.

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[文献类型]:科技报告
[标题]:Dynamic Modelling and Response Characteristics of a Magnetic Bearing Rotor System Including Auxiliary Bearings.
[作者]:free, a. m. flowers, g. t. trent, v. s.
[机构]:Auburn Univ.,AL. Solid State Sciences Center.*National Aeronautics and Space Administration,Washington,DC.
[关键词]:dynamic response,experiment design,magnetic bearings,rotor dynamics,turbomachinery,computerized simulation,controllers,dynamic models,
[出版年份]:1995
[报告号]:NAS
[报告时间]:1993,
[页码]:9p
[馆藏索取号]:N95-23213
[总页数]:10


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[唯一标识符]:CDSITC.AEROSPACE.A94-11460
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1994-11460; Reference AN: A94-11460
[标题]:On the optimality of a universal noiseless coder
[作者]:Yeh Pen Shu; Rice Robert F; Miller Warner H
[书名]:IN: AIAA Computing in Aerospace Conference, 9th, San Diego, CA, Oct. 19-21, 1993, Technical Papers. Pt. 1 (A94-11401 01-62), Washington, American Institute of Aeronautics and Astronautics, 1993, p. 490-498
[文摘]:Rice developed a universal noiseless coding structure that provides efficient performance over an extremely broad range of source entropy. This is accomplished by adaptively selecting the best of several easily implemented variable length coding algorithms. Variations of such noiseless coders have been used in many NASA applications. Custom VLSI coder and decoder modules capable of processing over 50 million samples per second have been fabricated and tested. In this study, the first of the code options used in this module development is shown to be equivalent to a class of Huffman code under the Humblet condition, for source symbol sets having a Laplacian distribution. Except for the default option, other options are shown to be equivalent to the Huffman codes of a modified Laplacian symbol set, at specified symbol entropy values. Simulation results are obtained on actual aerial imagery over a wide entropy range, and they confirm the optimality of the scheme. Comparison with other known techniques are performed on several widely used images and the results further validate the coder's optimality. (Author)
[关键词]:LOW NOISE; VERY LARGE SCALE INTEGRATION; CODERS ; DATA COMPRESSION; AERIAL PHOTOGRAPHY; IMAGE PROCESSING; ALGORITHMS ; ENTROPY STATISTICS; CMOS
[出版年份]:1993
[专业领域]:CYBERNETICS
[唯一标识符]:CDSTIC.ISTP.1285844
[文献来源]:科学技术会议录索引(ISTP)
[文献类型]:科技会议
[标题]:PRODUCTION OF VIRUS-FREE ARTICHOKE GERMPLASM
[作者]:G Babes;V Lumia;G Pasquini;G DiLernia;M Barba
[出版单位]:INTERNATIONAL SOCIETY HORTICULTURAL SCIENCELEUVEN 1
[ISSN_ISBN]:90-6605-239-2
[会议名称]:5th International Congress on Artichoke,TUDELA, SPAIN,May 5-8, 2003
[来源]:PROCEEDINGS OF THE VTH INTERNATIONAL CONGRESS ON ARTICHOKE,pp 467-472
[系列名称]:ACTA HORTICULTURAE
[编辑者]:EFJS Villar
[主办单位]:Int Soc Hort Sci;Navarra Govt;Navarra Inst Food Qual;Tech Inst Agr Management
[地址]:G Babes,IST_SPERIMENTALE_PATOL_VEGETALE, ROME, ITALY
[专业领域]:HORTICULTURE