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This paper describes an approach to reverse engineering based on the formal semantics of the strongest postcondition predicate transformer,and the partial correctness model of program semantics introduced by Hoare. The main point of our investigation is how to use informal and formal methods for reverse engineering. The approach provided by this thesis is mainly to process the C program system for reverse engineering.

本文描述的逆向工程中的形式化方法采用最强后置条件谓词转换技术和Hoare理论中有关程序语义的部分正确性模型，研究的重点是利用形式化技术和非形式化技术对程序代码进行逆向工程，以支持软件理解和维护。

A simple polynomial approach for A Class of nonlinear system modeling is presented. By this, the input-output data are firstly changed into [0, 1] by using topological homeomorphism conversion; then an initial polynomial model is selected. The parameters of polynomial model are estimated by using recursion least squares method. A final polynomial model is obtained by repeatedly estimating parameter and eliminating redundant terms.

给出一类非线性系统的实现简单的多项式逼近的建模方法，在此方法中，将输入输出数据通过拓扑同胚变换，变换到[0，1]区间内，用多项式逼近的方法进行建模，对初始给定的多项式模型，通过反复的参数辨识、去除模型中的冗余项，得到非线性系统的多项式逼近模型，再利用拓扑反变换，将数据还原回原始数据区间。

Because the workpiece is in dynamic balance, the resultant moment acting on it should be zero. Introducing the moment from lapping tool and press head a moving differential equation is built. In this equation only workpiece rotating speed is unknown. It means that workpiece rotating speed can be got by this equation. Since there is a transcendental function in integral function of the equation an analytic result can not be got, only digital result can be got by a computer. Thus a change rule of workpiece rotating speed with lapping parameters is known, e.g. the radius of press disc ball socket, radius of press head ball, the distance between the workpiece rotating axis and lapping tool rotating axis, workpiece radius, modulus of elasticity of the press head and press disc, friction coefficients between the lapping tool and workpiece, and between the head and disc, pressure between the lapping tool and workpiece and pressure between the press head and press disc.

因工件处于动态平衡状态，其上所受到的来自于磨具和压头的力矩应相等，将二力矩表达式联立，建立工件运动微分方程，该方程中只有工件的旋转角速度是未知量，因此可以求出工件旋转角速度，但该方程积分式中含有超越函数，得不出解析解，只能通过计算机求出数值解，得出工件旋转角速度随各研磨参数的变化规律，如压盖球座半径、压头的球头半径、工件回转中心相对磨具回转中心的偏心距、工件半径、压头和压盖材料的弹性模量、磨具与工件间的摩擦系数、压头压盖间的摩擦系数、磨具与工件间的压强、压头压盖间的压力等。

Chapter 5 deals with the solvable theorem of adaptive inverse optimal control problems for a class of stochastic nonlinear systems driven by Wiener noises of unknown covariance. The systems are depicted by It〓 stochastic differential equations. By using an adaptive backstepping algorithm and stochastic control Lyapunov functions, the designing procedure of control laws of global asymptotic stability in probability and adaptive inverse optimal stabilization in probability are presented systematically. Adaptive control laws and parameter update laws can be obtained at the same time by this design scheme.

在第5章中，针对具有方差不确定Wiener噪声扰动和未知定常参数的随机非线性系统（假设方差的F—范数是一个常数或一个缓慢变化的量，对其进行在线辨识），给出并证明了自适应逆最优控制问题可解定理，基于随机Lyapunov定理和It〓微分规则，采用自适应Backstepping设计方法，系统地设计了全局依概率渐近稳定和自适应逆最优控制策略，这种设计方法可同时获得控制策略和自适应律，计算机数值仿真结果表明该控制算法是有效性的。

In this paper,a new device of synthesizing iodoform by electrochemistry method was introduced and the optimum reaction condition of synthesizing iodoform had been explored by this device.

对电化学合成碘仿装置进行了改进，探索出了利用该装置合成碘仿的最佳反应条件。

Eighthly,this Chinese need some experiences, if he has no interest in operating Chinese restaurant , and is also lack of the talent in showing up in broadway or potential ability of working in wal street, then he at latest should take part in all kinds of social activities from middle school stage , like becoming leader in the club or sport teams of the school, it is said reagon , whose study is bad as junior bush, attract the attention from the others by this way, then he should join the army, better to stay some time in navy, kater , nixon, kennedy service for navy,however he got a prize or not during the service time, after that,he should take a layer career, he don't expect to earn a lot from this line, instead , learn some skills from the line of everyone trying to cheat others,, then with this ability enter house of representatives or senate , and become a member of them, if can work as a governer ,like nixon , kilter, Clinton or junior bush, then it is natural to go to white house.this is stardand road for the white to become a president, in the society crowded with the white, a Chinese with yellow skin can't separate from the track an half step, then possilbly to be a president.

第八，这位华裔要有一些必要的经历。如果他对经营中餐馆没有兴趣，他又缺少到百老汇亮相的天赋或是到华尔街发展的潜力，那他最迟也要在上中学时就开始积极参与各种各样的社会活动，比如在学校成为一些俱乐部和运动队的领导人之类的。据说学习成绩和小布什有一比的里根就是这样赢得更多人关注的。然后他要进入军队，最好是在海军服役一段时间，卡特、尼克松和肯尼迪都曾在海军服役，肯尼迪最好的战绩是二战时他指挥的鱼雷艇被日本海军击沉。服役时无论能不能拿到勋章，退役后他应该马上谋得一个律师职业。他不应指望在这个行业里挣多少钱，他要在这个尔虞我诈的行业里练就一身进退自如的本领，然后携艺下山进入州或联邦的众议院或参议院，成为一名受人尊敬的州众议员或联邦参议员，中间如果能像尼克松、卡特、克林顿和小布什那样先干几年州长，然后再向白宫进发就更顺理成章了。这几乎是每一个白人总统标准化的成长路径，在一个白人居多的社会里，一个黄皮肤的华裔他不能脱离这样一个即有轨道半步，才有可能问鼎总统宝座。

Objective:30 cases of early brain lacunar infarction are observed by MRI and CT comparatively.By this way we can analyze the diagnostic value of MRI and CT to this disease.

目的：本文通过对30例早期腔隙性脑梗塞的MRI和CT的对照观察，以进一步研究MRI、CT对本病的诊断价值。

In this paper, a method of the optimum design for a semi-active structure controlled by MR damper system is presented, response of the first vibration mode of the structure is controlled by this method, and both safety and economic demands of the structure are satisfied.

提出一种用于中底层建筑MR半主动控制阻尼器优化设计的方法，它是以控制结构的第一振型反应为目标，可以兼顾安全和经济两方面的要求，且设计过程较为简便。

"In part III, Sister Nereid raised some five questions and by this mind-blowing questions, Liu Bao was required to think it over that why, when and what's on earth going on in the relationship between he and his little bee. By this, Liu Bao is assumed to be enlightened for what's going to happen afterwards."

"接下来，nereid姐姐向刘宝提出了五个问题，要求刘宝开动脑筋，思考一下在自己和小蜜蜂之间为什么，什么时候以及到底发生了一些什么，通过这样的帮助和思考，要求刘宝宝弄清后来到底又发生了什么。"

In this final self-portrait, the painter represents himself by this black form, like a silhouette of himself sitting in his armchair, surrounded by the pleasures which have enriched his life: the yellow petals fluttering away have the gaiety of musical notation; the green odalisque symbolises the Orient, while a dancer pays homage to the female body.

在这最后的自画像，画家代表本黑色形成自己就像一个人影，他对自己坐在扶手椅，由具有丰富了他的生活乐趣：在高高飘扬的距离有乐谱欢乐黄色花瓣包围；绿色宫女象征东方，而舞者致敬的女性身体。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。