出自

Firstly, based on the sliding mode control and backstepping technique, a new attitude tracking controller is derived to control the attitude motion of spacecraft, the stability of the system is analyzed via Lyapunov method and the reaction wheel dynamics is also considered from the real applications point of view. The whole design process is divided into two steps: the first step is to use sliding control technique to design suppositional adaptive variable structure controller; and the second step is to design attitude tracking controller based on SMC and backstepping technique. Numerical simulations are performed to show that both tracking maneuver and vibration suppression can be accomplished effectively.

首先，采用自适应后步法结合主动振动控制技术设计了姿态跟踪鲁棒控制器，基于Lyapunov方法分析了系统的渐近稳定性；在此基础上，显性地考虑了执行机构动态特性问题，将整个设计过程分为两个步骤：第一步采用滑模控制技术设计了变结构虚拟控制器，给出自适应控制律的设计方法；第二步，将后步法与滑模控制技术相结合，设计了姿态跟踪鲁棒控制器，给出飞轮电压的输入算法及稳定性分析；最后，将提出的控制方法应用于挠性航天器的姿态跟踪控制，通过数值仿真对所提方法的可行性与有效性进行分析和验证。

Is a professional cricket cricket cans, flowerpots technology companies, one now has more than 200 years of history, cricket cricket cans, flowerpots permeability, and absorption strong, black, red, blue, yellow, white-colored canscricket cricket From the same kiln, without adding any chemical raw materials, the only system used by fire.

是一家专业从事蛐蛐罐、花盆工艺的公司，到现在一有200多年的历史了，蛐蛐罐、花盆透气性好，吸水量强，黑、红、青、黄、白各色土陶蛐蛐罐出自同一个窑，在不添加任何化学原料的情况下，仅靠用火烧制而成。

Boxed profiles of the journalists and well-selected photos round out the text, and source notes, suggestions for further reading, and an extensive bibliography close.

新闻记者的盒装描绘和选择良好的相片回合出自本文和来源笔记，对于较进一步的阅读、和一个广泛的叁考书目的提议关。

This paper intends to show that Akutagawa Ryunosuke's unfavorable criticism on China in the book is not out of contempt or insult, but out of his eagerness to inform well-learned Chinese and the Japanese devoted to "Chinese taste" of the serious reality of China's society.

中国游记》中批评中国的言论并不是出自芥川龙之介对中国的蔑视与轻侮，而是来源于芥川向中国的有识之士和沉醉于&中国趣味&的日本人传递中国社会沉重现实的急切之情。

Evil presents itself in many forms, and sometimes well-intended actions can twist even the greatest of heroes into the very monsters they've sworn to destroy, as seen with Anakin Skywalker's emotional fall in Revenge of the Sith, now in theaters.

邪恶的表现方式有许多种，有时出自良好意愿的行为甚至可以将最伟大的英雄扭曲成为他们誓要消灭的怪物本身，就好象阿纳金-天行者在《西斯的复仇》中令人感慨万千的堕落。

The very limitations of Judge Pyncheon, his conceit, his thick-hided selfishness, made him the symbolical and so the most solidly real of all of Hawthorne's characters

品奇昂法官的缺点，他的自负，他的厚颜无耻的自私，完全不是出自虚构，因而也是霍桑笔下最真实的人物。

The message came pinned to the tail of a Serpent Fly, written by Niven's flourishing hand because like most of the Mudlanders Droglo couldn't read or write.

一只毒蝇带来了一封明显出自奈文之手的消息，因为其他大部分沼泽住民包括卓格洛根本就不认识字。

The side from the "Public prescription regimen," added to the list, for the administration "Summer Note imaginary disease", the spleen and stomach were weak or insufficient differentiation of commonly used goods.

本方出自《摄生众妙方》，品名为后加，原用于治&注夏虚病&，为脾胃虚弱或气阴不足者常用之品。

Autism can be a hard diagnosis to make and harder still to explain to parents in a way that is factual and without sugar-coating, but not devoid of hope and empathy.

一般情况下我们不会轻易作出自闭症的结论，比这更难的是如何对孩子的父母以实情相告，而不是拐弯抹角，但这种病也不是完全没有治愈的希望。

Both men were plainly the worse of drink, and they were still drinking; for, even while I was listening, one of them, with a drunken cry, opened the stern window and threw out something, which I divined to be an empty bottle.

另一个声音，当然是出自那个戴红帽子的家伙。两个人显然已酒醉如泥，但还在喝。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。