实际地

In our thesis, contents are organized as following In Chapter 1 we present our topic's internal and overseas research situations, theoretical and practical significance, and introduce the research object and contents, and the main contributions of this dissertation. Chapter 2 reviews the development of the stability results for nonlinear systems and some relevant recent results, which include Lyapunov and LaSalle-Yoshizawa theorems for nonlinear systems, and stochastic edition for stochastic nonlinear systems. Sontag's formula for systems affine in control is presented in the frame of CLF. The concepts of disturbance attenuation and the inverse optimality are also explained in this Chapter. In chapter 3 we present the solvable theorem of inverse optimal gain assignment problem, design the inverse optimal controller and the inverse optimal tracking controller for strict-feedback nonlinear continuous systems with unknown time-varing bounded disturbances and constant unknown parameters using an adaptive backstepping algorithm, which are nonlinear, continuous and are easier to realize. These designs are fully systematic and the algorithm can be directly coded in symbolic software. The results of simulation show the effectiveness of the control algorithms.

论文的结构如下：在第1章中，给出了本文研究课题的研究现状、理论意义和实际应用，并介绍了本文的研究对象、研究内容以及主要贡献；在第2章中，针对确定性非线性系统和随机非线性系统，分别介绍了Lyapunov定理、LaSalle-Yoshizawa定理及其随机版本；对仿射系统，在控制Lyapunov函数框架下，给出了Sontag公式；同时给出了非线性系统扰动抑制和逆最优控制问题的基本概念；在第3章中，针对具有未知时变有界扰动和未知定常参数的一类不确定非线性系统，给出并证明了逆最优增益配置可解定理，使用自适应Backstepping算法和均值定理，系统地设计了自适应逆最优控制器和逆最优跟踪器，这种设计方法可同时获得逆最优控制策略和自适应律，简单明了，仿真结果表明该控制算法的有效性，并给出了性能估计。

After certifying the irreality of ideal filtering function, we can get a better filter selecting a proper window function. Comparing two actual filters, we designate a good"Panama hat"filtering function. Meanwhile, an effectively linear interpolating function is introduced to raise the image reconstruction quality. Describing its realizing steps on the micro-computer briefly, we reconstructed some images from the anlogue projections of some models. The number of projection views is 180, 100 same interval parallel lines per view; the size of reconstructed images is 64×64 pixels with 64 gray levels; the reconstructing speeds are 40" on PC-386 and 12"on PC-486, respectively; each pixel is 0.31mm.

在证明了理想滤波器的不可实现性之后，得知通过选择适当的窗函数可获得很好的滤波函数，经过两个实际滤波器的效果对比，我们选取了较好的"巴拿马帽"形滤波函数，同时也介绍了一个有效的提高重建质量的线性内插函数，概要地叙述了平行射束图象重建的计算机具体实现步骤后，对几个物体的模拟投影数据进行了重建：投影角为180°，每视角下有100个平行投影数据点，在386微机上重建尺寸为64×64，时间约为40秒；在486/33MHz微机上只用了12秒，图象的象点精度是0.31mm。

With the popularization of computer and rapidly development of computer science technology, more and more people use computer to deal with practical issuer.

随着计算机的普及和计算机科学技术的飞速发展，人们开始越来越多地利用计算机解决实际问题。

To enhance the effectiveness of training of Party member ethics, must establish is new-style " rule of virtue " view, hold the basic content of socialism and communistic morality character and feature, in daily life paradigmatic ground abides by social morals, the sentiment; with him exalted education strengthens professional ethics training,; of action of type of van of sufficient on one's job post play holds to integration of theory with practice, knowing and doing is unified, in the education in practice good moral character; holds to close tie masses, develop democracy, accept people self-consciously supervise, improve moral quality of the Party member.

为增强党员道德修养的有效性，必须确立新型的"德治"观，把握社会主义和共产主义道德品质的基本内容和特征，在日常生活中模范地遵守社会公德，培养自己高尚的情操；加强职业道德修养，在本职岗位上充分发挥先锋模范作用；坚持理论联系实际，知行统一，在实践中培养良好的道德品质；坚持密切联系群众，发扬民主，自觉接受人民群众的监督，提高党员的道德素质。

Arthur: Don't be so judgmental. You have no idea about his circumstances.

亚瑟：别这麼主观地批判，你又不了解他的实际情况。

Combine in single-phase kilowatt-hour meter checking meter concrete application of the system , do a simple example to infrared practical application ofdata communication. Because infrared communication interface, it hold person who check meter can finish it easy. The efficiency of improving the work of checking meter greatly , and check meter to exactitudly and stop to some mistakes check.

结合在电度表抄表系统中的具体应用，对红外数据通信的实际应用做了一个简单的例子，在电度表抄表系统中，由于配备了红外通信接口，利用手持抄表器可以方便地完成对电度表的抄录和校准等工作，大大提高了抄表工作的效率，而且抄表精度高并杜绝了估抄和误抄的问题。

Laneway run through calculation method using vertical distance and actual application are introduced .

介绍了用垂距法进行巷道贯通计算的方法和实际应用，无论巷道之间的位置如何，用该法总能简便快速地计算出结果，并有检核，可以提高工作效率。

This paper points out that laser beam quality's evaluating criterion is related to real application types.

详细地介绍了各种激光光束质量的评价标准，提出了光束质量的评价标准与实际的应用类型有关。

Through comparing the calculated values with experimented results, the research result indicates that the actual situation of the lattice beam can be well reflected by using two stages Moreover, the simplified foundation pressure is of benefit to the hand labor calculation.

通过对比分析理论计算最大值、采用简化的地基反力计算值和实测值，结果表明采用两阶段设计能较好地反应格构梁的实际受力情况，且设计安全，而简化的地基反力为手工计算带来了方便。

Left sina ground Wang Zhidong to establish to click science and technology, the real operation surface with oneself the ideal of person of software of a China, that makes a good software product namely, and with rolled out Lava-lava of instant communication tool 2006. Lava-lavaOEM rises with MSN comparing with QQ, it is a relatively open platform, what it is aimed at is user of a lot of groups of groups, can undertake 2 times opening on this system.

离开新浪地王志东创办了点击科技，以自己的实际行动表面了一个中国软件人的理想，那就是做出一个理想的软件产品，并且与2006年推出即时通讯工具lava-lava.lava-lavaOEM跟QQ和MSN比起来，是个相对开放的平台，它针对的是很多群组用户，可以在这个系统上进行二次开放。

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。