编队

The perturbed relative motion of satellite clusters on highly eccentric orbits makes orbit designers face a new challenge.

大椭圆轨道上卫星编队的相对运动特性及其所受摄动力的影响给编队轨道设计者提出了新的挑战。

Next, the thesis does a lot of research on the stability of formation, which give a theory support for the the reselection of the formation shape after adopting fault tolerance.

本文另外一个成果是对多机器人编队的稳定性进行了深入的研究，对容错后编队的重新选择提出了一种理论支持。

The research results show that the impulse control can not achieve high-precision formation and the solar sail that can provide low thrust of micro-newton is able to achieve small-size high-precision formation.

研究结果表明：利用脉冲控制很难实现高精度编队，太阳帆能提供微牛以下的连续小推力可以满足小尺度高精度编队需求。

Then, two semi-natural control laws were investigated for each kind of orbit and the stable regions were obtained for each case.

利用两种半自然编队控制率进行编队控制，其中一种为被动控制，对工程应用有很大的价值。

Then, two semi-natural control laws were investigated for each ldnd of orbit and the stable regions were obtained for each case.

利用两种半自然编队控制率进行编队控制，其中一种为被动控制，对工程应用有很大的价值。

A new scheme of target discrimination in SAR images, consisted of frames, models and algorithms, is proposed. Under such a scheme, a global frame, combining orderly the algorithm based on feature extraction and that based on knowledge, is then proposed. Moreover, in the method of target discrimination based on feature extraction, a "loose-coupling" model is given. The existing features are chosen and three new features about the contrast are given under the "loose-coupling". Meanwhile, an algorithm of feature selection based on Genetic Algorithm is also modified to solve the problem that the existing algorithm can not evaluate the goodness-of-features comprehensively. The weighted quadratic distance discriminator is designed to improve the performance of target discrimination. Finally, a method based on the knowledge of target groups to remove clutter false alarms is also given.

提出了一种目标鉴别的新方案，该方案包括目标鉴别的框架、模型以及算法；提出了基于特征选取鉴别和基于编队提取鉴别"序贯"连接相结合的目标鉴别框架；在基于特征选取进行目标鉴别的方法中，提出了目标鉴别的"松耦合"模型；提出了"松耦合"模型下目标鉴别的特征提取方法，包括已有特征的筛选和3个新的对比度特征的提出；改进了一种基于GA的特征选择方法，克服了已有方法对特征优劣评价不全面的问题；设计了加权二次距离鉴别器，提高了鉴别的性能；研究了基于目标编队知识进行进一步杂波虚警剔除的方法。

The main work and achievements are summarized as follows:From the point of view of the formation satellites system energy, the vectorial form of the generalized relative dynamic equations is derived by the Lagrange method.

本文的主要研究内容如下：从编队卫星的相对能量角度出发，基于拉格朗日方法给出了一般情况下编队卫星相对动力学方程的矢量表达式。

When the first universe fleet, looks like nebulas to be same, has flown rapidly Moon's time, in the pure white lunar terrain, appeared suddenly one each one appeared in motion in turn the huge V glyph phantom, these all were Huang Qu senior official yellow Jinlong and the black area senior official black must win, together the careful formulation flying route and the formation lineup, by this to the entire Earth expressed final had to win the determination and the faith, because of except the sun, the Moon was in the human naked eye only the biggest star, crowdedly only then possibly completed the so wonderful peerless magnificent feat with quantity huge interspace formation!

当第一宇宙舰队，像一片星云一样，急速飞过月球的时候，在洁白的月球表面，突然出现了一个个依次出现移动中的巨大 V 字形影像，这些都是黄区长官黄金龙和黑区长官黑必胜，共同精心制定的飞行路线和编队阵形，以此向整个地球表示最后的必胜决心和信念，因为除了太阳，月球是人类肉眼中唯一最大的星球，密集与数量巨大的星际编队才可能完成如此美妙绝伦的壮举！

Lt. J. K. Havener, a B-26 pilot, said,"On numerous occasions a 36-ship formation would join up below the overcast and then bore on up through it in formation."

哈沃恩中尉说，&属于赶大集规模36机编队会在云层下方编组，然后以编队爬升钻过云层。&

According to the air trajectory of every rocket-assisted torpedo part, we establish an equation group of air vertical motion, improve the in-air trajectory model, and simulatively calculate the polynomials of firing distance and flight time,and firing distance and shut down time. Making use of the polynomials, we calculate the cooperative time of formation salvo of torpedoes, and determine command ways for different situations. The result may facilitate the research of operational application of rocket-assisted torpedo.

根据火箭助飞鱼雷空中运动各部分的特点，建立了其空中纵向运动方程组，完善了空中弹道模型，仿真计算了射程-飞行时间和射程-关机时间关系多项式，利用关系式计算了编队齐射火箭助飞鱼雷的协同时间，确定了不同态势下的指挥方式，为深入研究火箭助飞鱼雷编队作战使用问题提供了重要的参考数据和理论依据。

At the rear was an innovative combination transaxle with the gearbox, clutch, differential, and inboard-mounted drum brakes.

在后面是与变速箱，离合器，差的创新结合变速，和内侧安装鼓式制动器。

For more people can apprecaite and have the master work, there is reproduction painting appears in the market, the large various selection of paint,the high saturation of color plus the plentiful sfumato, to make the reproduction perfect copy and detail as original painting, so as to meet the requirment of amateurs who love art paintings,they do not need to pay high price to get classical paintings.

颜料色域广，色彩饱和度高，色彩层次丰富，图像色彩还原真实，能完美的复制原作，满足艺术爱好者欣赏，艺术爱好者们不用支付昂贵的价格就能拥有经典油画。