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In this paper,an optimum trajectory from perilune to lunar surface is derived in terms of Pontryagin's maximum principle,which is an open-loop way.Then,an optimal nonlinear control law based on an fuzzy neural network is presented,on the basis of the optimum trajectory,due to the nonlinear mapping function of the fuzzy neural network,which is a closed-loop way.

本文根据终端着陆条件和性能指标,以由Pontryagin's极大值原理得出从近月点到月球表面的最优着陆轨迹为基础,给出一种基于模糊神经网络的非线性最优控制策略,使被控系统能够通过模糊神经网络的非线性映射能力实现某种最优的闭环制导控制。

A 4 regular Hamiltonian planar map is a plannar map which is both 4 regular and Hamilitonian. A nearly 4 regular map is such a map that all of its vertices but the root vertex are 4 valent.

若一个平面地图的所有顶点是四次的,且又是哈密尔顿地图,则称该平面地图为四正则哈密尔顿平面图一个地图是近四正则的,是指除去根点外,其余顶点的次均为四。

Near the end of the race Yaniv Sivan had opened up a 20 second advantage on Nir Sivan, who was now comfortably in 2nd, but the 3rd spot had not been decided yet.

附近的比赛结束yaniv斯万已开辟了二十秒的优势,对近红外光谱的斯万,谁是现在舒适的第二,但第三点了还没有决定。

Using the asymptotically compact theory of Anselone' and Stepleman' theorem, the existence, the unicity , the convergence and the error estimate with O(h3) of the discrete equations are shown....

并借助Anselone的渐近紧收敛理论和Stepleman定理,证明了离散方程组的解存在性、唯一性、收敛性和精度阶O(h~3)。使用Ostrowski的不动点定理,提供了三阶收敛的迭代法。

Loriformis differs as follows: main stem undeveloped; sheaths of cauline leaves ciliate only on 1 side of mouth; cincinni subcapitate; pedicels slightly curved; seeds finely white reticulate, neither pitted nor verrucose.

不过,M。 loriformis 的不同如下:主茎不发达;茎生叶的鞘具缘毛的只在口的1边;蝎尾状聚伞花序近头状;花梗稍弯曲;种子白色细网状,既不具洼点也不瘤状。

The new plan is certainly a lot meatier than the February effort, and markets for both debt and equities gave it an initial thumbs-up, the Dow Jones Industrial Average rising by almost 500 points and credit-derivative spreads signalling a lower risk of bank defaults.

这一新的计划无疑比2月的更加实在,债市和资产市场都有积极的回应,道指上涨了近500点,信用衍生产品也似乎要传递银行不履行义务风险的降低。

Premier Wen Jiabao yesterday chaired a State Council executive meeting to study the deployment of light and textile industry to promote the healthy development of policies and measures, identified the promotion of textile industrial development policies and measures 6; same day Tariff Policy Commission of the State Council issued the adjustment of export tariffs on notice; the Ministry of Finance also decided since 2009 years from January 1, in the national unity and to cease the levying of the abolition of 100 administrative charges; the Ministry of Information Industry and the introduction of 10 measures to ensure that priority areas and key links, and promote integration of information technology and industrialization development and promote the the optimization and upgrading of industrial structure, speed up the transformation of industrial economic development to ensure stable and rapid growth of the industrial economy; Ministry of Land and Resources, China from 2009 to gradually increase the land requisition compensation standards; human resources Social Security has decided to January 1, 2009 onwards enterprises to adjust the basic pension for retirees; Industry and Information Ministry said it would further improve the non-public capital into the financial, power, telecommunications, oil and other industries and areas of market access system, to intensify their way out specific operations; At the same time, 1-year interest rates dropped nearly a hundred votes in the central point, suggesting that the latter will continue to cut interest rates and reserve ratio down expectations.

国务院总理温家宝昨天主持召开国务院常务会议,研究轻纺部署,以促进政策和措施,健康发展,确定了纺织工业发展政策和措施6宣传;国务院当天关税税则委员会发出通知,对出口关税调整,财政部还决定,自2009年1月1年中,民族团结,停止了100取消征收行政事业性收费,在信息产业部和10措施确保重点领域和关键环节,促进信息技术与产业发展相结合,促进和优化产业结构升级,加快工业经济发展的转变,确保稳定,快速的工业经济增长;部土地和资源,从2009年起中国逐步提高征地补偿标准,人力资源社会保障已决定2009年1月1日起调整企业离退休人员基本养老金,工业和信息化部表示,将进一步改善非公有制到了金融,电力,电信,石油等行业和市场准入制度等方面的资本,加强其具体运作方式;在同一时间,1年期利率下跌了近100点,在中央票,这意味着后者将继续降低利率和存款准备金率下降的期望。

Adopting the method of demography and historical georgraphy,andon the basis of the administravie division of county and an imaginary Fu,this article reconstructs china's abnormal death roll during the period of 1959-1961,which amounts to 32,500thousand.

3万篇免费论文,近200个详细分类,为你的论文写作排忧解难。点击进入内容摘要:本文采用人口学和历史地理学的方法,以县级政区为基础,以虚拟的&府&级政区为单位,重建1959-1961年中国各地非正常死亡人口数。计算结果表明,1959-1961年中国的非正常死亡人口多达3250万。

Through this research, draw the following conclusions:(1) Through analyzing the changes of structure and area of first-class and second-class landscape, foundings show that in the past ten years, the main character of landscape pattern changes is natural secondary forest land and dry land reduced but human effect forest land and waste-grassland expanded in research area.

通过本文的研究,得出以下几点结论:(1)通过对一级与二级景观面积和结构的变化特点分析发现:近十年来研究区景观格局变化是以天然次生林地和旱地的缩小及人为影响林地与荒草地的扩张为主要特征。

Over the past twenty years, one of the most important aims in the field of high energy nuclear physics is to explore a new form of matter — quark gluon plasma, which has been predicted by the lattice Quantum Chromodynamics at finite temperature.

近二十年来,在高能核物理研究领域的一个重要课题就是寻找由有限温度下的格点量子色动力学预言的一种新的物质形态,即夸克胶子等离子体。

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推荐网络例句

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里,举止就文雅一些,因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计,这件高贵的制服是香港本土制造,是我们第一套不配帽子的制服。

Do not 'inflate' your achievements and/or qualifications or skills .

不要 '夸大' 你的业绩或成果,条件或者技能。