有小环的

He forgot that the "Central blocking, non-sheltered Day","wearing a short brown knot live in repeated air scoop" the hardships of life, in order to in this small world in to satisfy the demands of his nature, a pair of homing birds go hand in hand over his eyes, he "There is there is true, others want to forget words dialectic."

他忘却了那"环堵萧然，不避风日"、"短褐穿结，箪瓢屡空"的艰辛生活，为能在这片小天地里放逸他的天性而满足。刹时，一对结伴归巢的鸟儿掠过他的眼前，他怡然自得："此中有真意，欲辩己忘言。"

We have proposed the switching adaptive control law for the systems and designed the Lyapunov function in this thesis. It is proved that the proposed switching adaptive control law guarantees the solutions of the nonlinear systems boundedness and convergence of the tracking error to a residual set based on the Lyapunovs stability theory. The residual set can be made arbitrarily small by choosing a certain design parameters.

文中设计出了这类系统的切换自适应控制律，并构造出相应的Lyapunov函数，基于Lyapunov稳定性理论证明了系统在所设计的控制律作用下，闭环信号都有界并且跟踪误差收敛到一个集合，通过选择适当的参数可使这个集合任意小。

Aiming to the problem of the brittle fracture of cement sheath caused by perforation and other production enhancing measures after well cementing of thin oil reservoir wells,latex,rubber powders and PVA fibers were studied to reduce cement stone friability and distinguish the toughness and elasticity of cement stone accurately.

针对国内油田薄油层井、小间隙井和侧钻井固井后射孔及后续增产措施造成的水泥环脆裂问题，为了降低水泥石的脆性，正确评价不同材料对水泥石韧性或弹性的影响，对掺有胶乳、橡胶粉和PVA纤维水泥石的抗折强度、抗压强度、抗冲击功和弹性模量等力学性能进行了研究，并对3种材料的作用机理进行了剖析。

They have a smaller and stronger frame, knobby, as well as wider and higher-profile tires, which are mounted on a rim that is stronger and more durable than a standard bicycle rim.

他们有一个更小的和更有力的框架， knobby ，以及更广泛和更高的知名度轮胎，这是安装在轮辋是更强大和更持久的比标准的自行车环。

It was proved that the proposed adaptive fuzzy fault tolerant control approach guaranteeing all the closed-loop signals were semi-globally and uniformly bounded, and the tracking errors converge to a small residual set around the origin.

证明了所提出的自适应模糊容错控制方法能够保证闭环系统所有信号是半全局一致有界的，且跟踪误差收敛到原点的一个小邻域内。

In order to use computer in the roundness measuring,the algorithm of verifying method must be written .

在圆度误差测量中，对误差的评定是重要的一环，目前国标中规定有 4种评定方法，其中最小区域圆法为推荐使用的方法。

Washing, cutting ring and eyes require board (disc valve pump valve is the plate with the tie bar and wear-resistant film from top to bottom) the gap is smaller, there is a large amount of water to be strictly sealed, so to clean the ball forward after the infiltration of water .

水洗，要求切割环和眼睛板(碟阀泵则是板阀与系杆和上下耐磨片)的间隙要小，需有大量的水，严格密封，做到清洗球后的水不向前渗透。

Simulations are given for all control schemes designed in this dissertation, and they show that the control schenies can not only ensure the global boundness of all closed-loop signals, but also have good control effects (that is, the steady output tracking error is very small).

本文对所设计的所有控制方案都进行了仿真研究，仿真结果表明，这些控制方案不仅可以保证闭环系统所有信号的全局有界性，而且可以获得很好的控制效果（即稳态输出跟踪误差很小）。

Result :There was no significant difference between sexes,ages and sides.The fibrillation potential amplitude was maximum at 3 to 4 months after denervation of the posterior cricoarytenoid muscle or at 5 to 6 months after denervation of the thyroarytenoid muscle and still remained at certain level for years in some patients.Significant difference was showed in complete and incomplete nerve injuries groups,but changes of amplitude with time in incomplete nerve injuries group were small.

结果：不同性别、年龄及不同侧的纤颤电位波幅间的差异无显著性，失神经环杓后肌纤颤电位波幅均值在病程2～＜4个月时最高，而失神经甲杓肌纤颤电位波幅均值在病程4～＜6个月时最高，相当一部分患者的纤颤电位波幅晚期仍维持一定水平，并且神经完全损伤者和不完全损伤者各时间纤颤电位波幅均有显著性差异，而神经不完全损伤者各时间幅度变化小。

Tetrahydroisowuinolin derivatives and phthalide derivatives were designed and synthesized on the basis of a PDE4 inhibitor pharmacophore model set up through computer simulation. Some tetrahydroisowuinolin derivatives synthesized were evaluated on their activity against PDE4 for study on the structure-activity relationship.(7-cyclopentyloxy)-6-methoxy-3,4-dihydroisoquinolin-2(1H)-yl(4-hydroxy-3-methoxyphenyl)methanone (155) and Methyl 7--6-methoxy-2-(4-methoxy- benzoyl)-1-phenyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (170) showed good activity against PDE4, which were chosen as the lead compounds to design and synthesize another analogs in order to develop selective PDE4 inhibitors with better activity.

分别设计合成了以四氢异喹啉和氨基苯酞为骨架的两类小分子杂环化合物，并对部分四氢异喹啉衍生物测试了其相关的生物活性，初步确定了其构效关系，发现了两个对PDE4有较好抑制活性的先导化合物(7-cyclopentyloxy)-6-methoxy-3，4-dihydroisoquinolin-2(1H)-yl(4-hydroxy-3-methoxyphenyl)methanone (155)和Methyl 7--6-methoxy-2-(4-methoxy- benzoyl)-1-phenyl-1，2，3，4-tetrahydroisoquinoline-3-carboxylate (170)。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失