端出

This paper builtup esterification model, pre-polycondensation model, polycondensationmodel, and successfully built up monitoringon-line system of some key quality tar gets as well as operation systemmodel according to the polycondensation technique of NOY company.

本文在软测量技术的基础上，建立了酯化反应控制模型、预缩聚反应控制模型、终缩聚反应控制模型，并成功开发出在线控制系统，对生产过程中的关键质量指标如粘度、二甘醇、端羧基进行在线控制，控制精度达到小于2.5％。

Most of hob design for non-involute gears are nowadays taken by approximation method.For example,the normal sectional profile of hob worm therad is usually regarded approximately as its basic rack profile.Recently, some new methods have been developed in this respect but, perhaps, they appear overelaborate since the principle of spacing engagement is based on. For this reason , the paper offers a new design procedure for hob worm based on the planar engagement principle with the intention of simplific...

本文应用平面啮合原理精确设计各种非渐开线齿轮滚刀的基本蜗杆，提出并应用啮合线的投影原理从工件齿轮端截面的啮合线直接求得刀具蜗杆的端面齿形，而不必求出媒介齿条的齿形，方法很简单，还从啮合线的投影原理简明而形象地证明了一对螺旋齿轮直接啮合过程的啮合线是一条垂直于齿向的平面曲线。

In order to identify the disputed oil source in Suaiqo-Wen'an region, Baxian sag, Jizhong depression, on the basis of source rock evaluation and oil-to-source correlation in this region, we recognized the typical Palaeogene oil and Carboniferous-Permian oil viz. two-ends oil, and established effective identification index from detailed analysis of biological marker, separation of nitrogen containing compound, stable carbon isotope and also make reference to the foreign studies on coal derived oil.

针对长期以来冀中坳陷坝县凹陷苏桥-文安地区存在的原油来源争议的问题，在对本区烃源层评价认识和油源对比的基础上，运用生物标志物精细检定、含氮化合物的分离检定、稳定碳同位素分析等技术手段，并结合国内外煤成油的研究成果，划分出了坝县凹陷典型的下第三系原油和石炭-二叠系原油，即两类端元油，并提出了有效的判识指标。

Tip of stem sometimes enclosed within a stipulelike sheath, the prophyll, sometimes adnate to petiole, absent in Peperomia .

茎有时内藏在一托叶状鞘，先出叶，有时贴生于叶柄内的端部，在Peperomia内无。

Simulations show that the proposed scheme has a better performance than that of the traditional scheme when the channel information is not perfectively known at transmitter. And the scheme is obviously robust when the uncertanty of channel information changing.

仿真结果表明：当发射端获得的信道信息不准确时，提出的算法表现出比传统特征波束成形算法更低的误比特率，并且当信道信息的不确定程度变化时，提出算法的性能有很好的鲁棒性。

To strengthen the relationship with my friends, I always wonder, how can it really work without our mu－tual understanding and support by communication. To show my sincere appreciation for my teachers'persis－tence in giving the lectures when they are ill, what can be better than extending a cup of tea to them during the break or a piece of greeting words. To fulfill my obligation to society, I'd like to begin from giving my hands and showing my love to those in need.

我时常想，如果没有最为简单的交流沟通和最起码的理解与支持，我们就无法增进朋友之间的情谊；而对于那些有病在身但仍在坚持给学生上课的老师，课间如能为他们端上一杯清茶或递上一张问候的纸条，也能很好地表达出我们对老师的真诚和感激之情；要履行自己对社会的责任和义务，我们不妨从小事做起，从给那些需要帮助的人以援助之手和真爱之心开始。

To strengthen the relationship with my friends, I always wonder, how can it really work without our mu－tual understanding and support by communication. To show my sincere appreciation for my teachers'persis－tence in giving the lectures when they are ill, what can be better than extending a cup of tea to them during the break or a piece of greeting words.

我时常想，如果没有最为简单的交流沟通和最起码的理解与支持，我们就无法增进朋友之间的情谊；而对于那些有病在身但仍在坚持给学生上课的老师，课间如能为他们端上一杯清茶或递上一张问候的纸条，也能很好地表达出我们对老师的真诚和感激之情；要履行自己对社会的责任和义务，我们不妨从小事做起，从给那些需要帮助的人以援助之手和真爱之心开始。

Background: Peripheral nerve injury is common and serious in clinically. According to the nerve regeneration theory of nerve tropism, neural regeneration room became hot spot for treating nerve injury.Then keep distance between the proximal and distal severed stumps with different conduits and others substance which can promote nerve regeneration ,the room can provid a favourable environment for nerve regeneration. a series of empirical study indicated immunosuppressant FK506 can promote nerve regeneration, chitosan is polysaccharose natural biomaterial , Chitosan is prepared by the N-deacetylation of chitin.

背景：周围神经损伤在临床上比较常见，根据神经趋向性再生理论，神经再生室成为神经损伤治疗研究的热点，即在神经断端之间留出一定的间隙，并套以不同材料的鞘管及其它促进神经再生的物质，为周围神经再生创造良好的再生环境，一系列实验研究表明免疫抑制剂FK506有促进神经再生的作用。

Through Hilbert transform, a signal's plane trace can be get. There are two frequencies in the tested signal, so the signal's plane trace may be looked as the track of the out pole's end when two poles rotate around parallel axles. Using the knowledge of motion synthesis in theory mechanics, a formula to describing the change of plane trace's step length and angle for two-frequency be get. So we may prolongate the tested signal's plane trace from the echo's initial arriving moment, and get a certain length of the signal's prolongation.

通过Hilbert变换可得到测试信号的平面迹线，测试信号中只含有两个频率成分，视为双频信号，双频信号的平面迹线相当于两连杆绕平行轴转动时外杆杆端迹线，利用理论力学中运动合成和瞬心知识，推导出双频信号平面迹线步长平方满足余弦线性复合函数，而迹线转角可视为线性变化，据此可对回波到来之前的测试信号平面迹线作延长，得到一定长度的信号延展段，信号延展段与实测段作差可得到一次、二次回波的第一个波峰值。

Although the EPRI give a set of the approximate engineering solution method, actually the crack of parts in engineering project mostly presents inner 3D effect. If using 2D elastic-plastic or 3D elastic analysis, the result can't be precise. Because these methods have neglected the reassignation of the stress and strain which happened at nearly the top of cracks, carrying on 3D elastic-plastic analysis and J-integral calculation become the foundational work to study the expander and safety assessment of the pressure vessel cracks.

虽然EPRI给出了一套近似的工程解法，但实际上工程中构件的裂纹大多呈现内在的三维效应，若使用二维弹塑性或三维弹性分析必然不够精确，因为对裂纹的&等效&二维表达忽视了发生在靠近裂纹端部的应力和应变的再分配，所以对压力容器裂纹进行三维弹塑性分析及其J积分是研究压力容器裂纹扩展和安全评定的基础工作之一。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。