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棉花学报 1999年第4期11卷 213-219页

作者：陈金湘萨摩尔.s.d. 湖南农业大学植物科技学院墨西哥查平哥国立自治大学

根据在墨西哥伊瓜拉格尔热罗自治大学的图斯班联合试验农场国家棉花种质资源保存、种植中心和其它原产地的考察、研究结果，结合查阅和分析有关文献资料和历史证据，对起源于墨西哥的棉花种质资源进行了综合评述。墨西哥是棉属（Ｇｏｓ... 详细信息

根据在墨西哥伊瓜拉格尔热罗自治大学的图斯班联合试验农场国家棉花种质资源保存、种植中心和其它原产地的考察、研究结果，结合查阅和分析有关文献资料和历史证据，对起源于墨西哥的棉花种质资源进行了综合评述。墨西哥是棉属（Ｇｏｓｙｐｉｕｍ）Ｄ基因组（Ｄ１，Ｄ２－１，Ｄ２－２，Ｄ３－ｄ，Ｄ４，Ｄ６，Ｄ７，Ｄ８，Ｄ９，Ｄ１０，Ｄ１１），陆地棉［Ｇ．ｈｉｒｓｕｔｕｍ（ＡＤ）１］和长矛棉［Ｇ．ｌａｎｃｅｏｌａｔｕｍ（ＡＤ）７］棉种的起源中心。墨西哥的棉花种质资源对现代棉花育种和世界棉花生产作出了巨大的贡献。从起源于墨西哥的陆地棉所培育出的品种，占当前世界棉花生产的９１％以上，亚洲棉（Ｇ．ａｒｂｏｒｅｕｍ）不到４％，海岛棉（Ｇ．ｂａｒｂａｄｅｎｓｅ）约为５％。墨西哥的棉花种质资源，由于没有得到很好地保护和利用，有些野生种或原始陆地棉栽培种已经或正在消失。

关键词：棉属野生种评价起源墨西哥

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Principles of development of dental Noble Metal Alloys

Principles of Development of Dental Noble Metal Alloys

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第三届国际贵金属会议——“铂金在现代工业、氢能源及未来生活中的应用”

作者： Tykochinsky d.s. Vasekin V.V. Levchenko s.d. FsUE sIC“supermetal”

The results of the study in the field of the effect of alloying elements on the properties of gold alloys,which was carried out at"supermetal"with the purpose of development of new alloys for dentures, have been presented in the *** designed and produced alloys have a high content of noble metals(the total of gold and platinoids is 70%to 98%by mass);they have a high corrosion resistance and biological inertness and satisfy the medical and technical requirements.

关键词： Alloy dentistry Noble metal Gold Alloying element Properties

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Prediction of Boiler drum Pressure and steam Flow Rate Using Artificial Neural Network

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Journal of Energy and Power Engineering 2010年第8期4卷 9-15页

作者： A.T. Pise s.d. Londhe U.V. Awasarmol department of Mechanical Engineering Government College of Engineering Karad Maharashtra 415124 India department of Mechanical Engineering Government College of Engineering Chandrapur Maharashtra 442401 India department of Mechanical Engineering Army Institute of Technology Pune Maharashtra 411015 India

Numerical simulation of complex systems and components by computers is a fundamental phase of any modern engineering activity. The traditional methods of simulation typically entail long, iterative processes which lead to large simulation times, often exceeding transient real time. Artificial neural networks （ANNs） may be advantageous in this context, the main advantage being the speed of computation, the capability of generalizing from the few examples, robustness to noisy and partially incomplete data and the capability of performing empirical input-output mapping without complete knowledge of underlying physics. In this paper, the simulation of steam generator is cons.d.red as an example to show the potentialities of this tool. The data required for training and testing the ANN is taken from the steam generator at Abott Power Plant, Champaign （UsA）. The total number of samples is 9600 which are taken at a sampling time of three seconds. The performance of boiler （drum pressure, steam flow rate） has been verified and tested using ANN, under the changes in fuel flow rate, air flow rate and load disturbance. Using ANN, input-output mapping is.d.ne and it is observed that ANN allows a good reproduction of non-linear behaviors of inputs and outputs.

关键词： Boiler artificial neural network steam flow rate drum pressure.

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Influence of design Parameters on Cogging Torque in directly driven Permanent Magnet synchronous Wind Generators

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Journal of Energy and Power Engineering 2010年第7期4卷 42-47页

作者： Q.L. deng s.d. Huang F. Xiao Institute of Electric and Information Engineering Hunan University Changsha 410082 China dept. of Electric and Information Engineering Hunan Institute of Engineering Xiangtan 411101 China

In order to reduce the cogging torque, this paper investigates the influence of some parameters on the cogging torque developed by directly driven permanent magnet synchronous wind generators. Bas.d.on the remanent magnetic flux densities, the cogging torque is computed by using finite element method. It is shown that many parameters have influence on cogging torque and the slot and pole number combination has a significant effect on cogging torque. A simple factor has been introduced to indicate the effect of the slot and pole number combination. some practical experience to reduce the cogging torque was applied to 2 MW three phase permanent magnet synchronous generator at rated speed of 37.5 rpm for wind energy conversion. The simulation and experiment results verify the effect of the propos.d.method.

关键词： Cogging torque permanent magnet synchronous generator electric machine design.

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The Principles of Harmonization of Economic Interactions in Consumer Co-operation

The Principles of Harmonization of Economic Interactions in ...

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作者： Novoselov Y.A. Novoselova E.A. Kapelyuk s.d. siberian University of Consumer

It is often observed that similar organizations with the same structure have different financial *** explain these differences by the quality of interactions using the data on consumer co-operatives which represent an...

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HIGH-ENERGY PROTON IRRAdIATION EFFECTs ON GaAs/Ge sPACE sOLAR CELLs

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Acta Metallurgica sinica(English Letters) 2001年第6期14卷 463-466页

作者： R. Wang (The Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Institute of Low Energy Nuclear Physics, Beijing Normal University Beijing Radiation Center, Beijing 100875, China) s.d. Yao (department of Technical Phys Inst. of Energy Nucl. Phys. Beijing Normal Univ. Beijing 100875 China

This paper reports the high-energy proton irradiation effects on GaAs/Ge space solar cells. The solar cells were irradiated by protons with energy of 5-20 MeV at fluence ranging from 1×109 to 7×1013 cm-2, and then their electric parameters were measured at AM0. It was shown that the Isc, Voc and Pmax decrease as the proton energy increasing, and the degradation is relative to proton irradiation-induced defect with a level of Ec-0.41 eV in irradiated GaAs/Ge cells.

关键词： Germanium High energy physics Irradiation Protons semiconducting gallium arsenide

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Crazy horse''s vision 1st ed.

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2000年

作者： Joseph Bruchac illustrated by s.d. Nelson

ISBN: (纸本)9781584302827

Joseph Bruchac tells the compelling story of how a young boy named Curly seeks a vision in the hope of saving his people -- and grows into the brave and fierce warrior Crazy Horse. sioux artist s. d. Nelson's paintings, in the traditional ledger style of the Plains Indians, evokes the drama and the tragedy of this important American figure.

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