最后分析

This paper describes the development of urban rail traffic and its significance and the necessity of electric braking. Air brake system and focuses on the analysis, the choice of the braking system, the structure and principles of pneumatic braking system. Finally, the prospect of urban rail transport vehicle braking system developments.

本文阐述了城市轨道交通及其发展的意义，分析了电气制动及其研究的必要性，并着重对空气制动系统进行了分析，分析了制动系统的选择、气动制动系统的结构及原理，最后展望了我国城市轨道交通车辆制动系统的发展趋势。

Firstly, it discusses the principle of adaptive interference chancellor, including broad band signal and narrow band signal; Secondly, it analysises one common algorithm used in adaptive interference chancellor, that is, LMS algorithm and its anamorphosis algorithm especially normalized LMS algorithm pointing out their relationship. After then, the paper talks about the structure and reality of canceling broad band noise in narrow band signal and narrow band noise in broad band signal and gives it's result simulation analyzing the factors affecting the power of the algorithm. In the last party, it gives the hardware design and assembly language software design using TMS32OC3 1, including the result of simulating.

首先，本文讨论了自适应干扰对消的原理，并对窄带信号和宽带信号两种进行了分别分析；然后本文对自适应干扰对消中常用的算法—LMS算法进行了分析，同时也讨论了LMS算法的变形算法，尤其是归一化LMS算法，并指出了这些算法的相同和不同之处；此后，本文讨论了窄带信号中的宽带干扰对消和宽带信号中的窄带干扰对消的结构及实现方法并给出了住址的结果，分析了影响干扰对消效果的因素；在论文的最后，给出了用TMS320C31实现窄带信号中的宽带干扰对消的硬件设计和汇编程序设计，以及汇编语言程序的结果，并就此结果与高级语言程序的结果作了比较。

First, I will analyse the base , Chinese education on the ancientry time, of t...

首先从近代教育的发起阶层讨论，分析在古代教育基础上的中国近代教育；其次分析西学的涌入，及士大夫提出的"中体西用"这一近代教育的特质；再次，从中西方教学中比较得出中国近代教育的特点，即洋务派的"中体西用"的思想；最后以福建船政学堂为例分析中西教育的优缺点及对中国教育近代化的影响。

Based on the reanalysis of JEDAC datasets and the assimilation of SODA, the authors studied the variation of the heat status in the West Pacific Warm pool and discussed the ocean temperature variety in the heat content at different depths, the inherent relations between ocean temperatures at surface and subsurface, the eastward propagation of anomalous ocean temperature and the thermocline variation, and the influence of equatorial undercurrent on the eastward propagation.

中文摘要：应用 JEDAC 海温和SODA 再分析资料，分析研究了西太平洋暖池的热状况变化特征，探讨了WPWP 的热含量变化与不同深度海温变化，特别是与表层和次表层海温场之间的内在联系，分析研究了WPWP 异常海温东传过程中与温跃层变化之间的关系，最后讨论了赤道潜流在异常海温东传过程的作用。

The mechanism of the OGFC pavement functions is fully analyzed, with a description of the mix ratio design and raw material selection, including the function and features of permeability, antiskid , noise reduction, temperature reduction, etc.

全面分析了OGFC路面的功能与作用的机理，介绍了OGFC配合比设计和原材料选择，分析了透水性、抗滑性、降噪性和降温性等功能和特点，最后也分析了耐久性差、生产成本高、维护成本高等不足。

Methods The approach is based on the 39 cases which had been diagnosed as biliary duct ascariasis through ultrasonic examination and later been confirmed clinically from March,2003 to May,2006 in Changhang Hospital,according to which we analyze manifestations and clinical significance of biliary duct ascariasis and its complications.

摘要］ 目的通过分析和总结胆管蛔虫症的声像图表现及其临床意义来提高对本病声像图的认识及诊断符合率方法通过回顾性分析我院2003年4月～2006年5月超声诊断胆管蛔虫症、临床最后确诊的39例病例资料，分析胆管蛔虫及其并发症在超声图像上的表现和临床意义。

Secondly, the steady-state productivity model for horizontal well in gas reservoir is established. On the basis of solving the model, this thesis elicits the binomial deliverability equation by which absolute open flow potential and inflow performance relationship can be got and we can forecast the production performance of horizontal well in gas reservoir. In the end, on the basis of the theoretical analysis, this thesis explores homologous nodal analysis program.

其次，在建立水平气井不稳定渗流数学模型并求得其解的基础上，推导出了考虑地层伤害及非达西渗流影响水平气井产能方程，通过该产能方程可求出水平气井的绝对无阻流量，绘制流入动态关系曲线来预测生产动态；最后，在理论分析的基础上建立了水平气井节点分析方法，并开发了相应的节点分析程序。

At last, the thesis puts the analytic results into the practical application, in order to consummates the elements of cadastre、promotes the standardization of cadastre and improves the construction of cadastral database.

最后论文结合实际，在此前的分析基础之上，把分析结果初步应用于实际问题的解决之中就完善地籍要素、促进地籍的标准化和改进地籍数据库的建设做了分析研究，为解决问题提供了参考依据。

If the number of the second kind of damping element is comparatively less than the number of the whole structure element, its calculating efficiency will be higher.

据此，对这类结构作者编制了空间动力时程线弹性分析程序，验证分析程序的可靠性之后，对这类结构在地震波的作用下，按实际阻尼比、等效阻尼比、单一阻尼比等情况进行了三维弹性动力时程计算，分析在不同情况下的反应差别，比较三者的差异发现后两者计算结果用于设计或者造成浪费或者造成不安全，最后提出在设计中应该注意的问题及建议。

At the same time, combining with the actual condition of delivery pipeline of our country and some prevalent leak detection and location methods, this paper raised a method, which is based on wavelet analysis and negative- pressure-wave to detect and locate the leakage. Jobs in the paper are as follows:As affected by gas density, pressure, specific heat and pipe material, the velocity of negative-pressure-wave improved depending on the energy conservation. At one time, taking the affection of velocity of gas flow, the location formula was modified in some degree.When locating the leaks with location formula, the iterative approach algorithm was adopted as a new method to increase the location accuracy level of system.Multi-scale decomposition and reconstruction of wavelet transform is utilized to filter the noise of negative-pressure-wave, which was brought by leakage. With the capacity to detect the signal singularity fast and accurately, wavelet transform was used to catch the break point of pressure signal. The work improved the accuracy of At in location formula, accordingly improved the location accuracy.Wavelet is a suitable tool for signal analysis. The distinct character is that the mother-wavelet is of optional. That means choosing different mother-wavelet will get different analysis result. So we studied how to choose mother-wavelet and its scale for signal singularity detection. The method is to choose a wavelet by regularities of the wavelet and the signal.Finally, a plan, which bases on SCADA system for inspection and detection of natural gas leakage, is proposed in the article.

其中，主要进行了以下几方面的工作：针对泄漏产生的负压波在管道中的传播速度受媒介的密度、压力、比热及材质等因素的影响，而非声波在空气中传播的速度，本文利用能量守恒原理，对其进行了修正；考虑到管内气体流速对压力波速的影响，对原始的负压波定位公式进行了一定程度的改进，并在利用定位公式进行泄漏点定位时采用逐步迭代逼近算法，提高了系统的定位精度；利用小波变换的多分辨率分解和重构技术，对采集到的管道发生泄漏时产生的负压波信号进行了降噪处理；并利用小波变换技术对信号奇异点的快速、准确的识别能力，对经上述消噪后的负压波信号进行了奇异点捕捉，精确捕捉的结果提高了定位公式中上下游站点采集到的负压波奇异点的时间差△t的精度，从而进一步提高了定位的精度；考虑到小波变换是一种基波可变的信号分析工具，也就是说，不同的小波基波对信号分析的结果将有很大差别，这势必影响最终的处理结果，因此，我们又对比分析了本课题中小波基及尺度的选择问题，依据规则性系数相似性原理对母小波的选择进行了探索性研究；最后，还提出了基于SCADA的泄漏检测与定位系统的软件开发构想及系统的嵌入方案。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。