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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。

In which the Chamorro people (for the Spaniards, Micronesia and the Philippines people mixed descent) accounted for about 43 percent, and the rest mainly from the United States for the Philippines and mainland immigrants, as well as Micronesia, and Guam, such as indigenous people and Asians.

其中查莫罗人（为西班牙人、密克罗尼西亚人和菲律宾人的混血后裔）约占43％，其余主要为菲律宾人和来自美国大陆的移民，还有密克罗尼西亚人、关岛土著人及亚裔等。

Based on reconstruction example of Fushan Longjiang Town 325 national highway for which at-grade channelizing design is used for the intersections, described hereby are the applicability of channelized intersection, the features of channelized intersection such as the great carrying ability, less cost etc which would raise greatly the safety of vehicles and pedestrians, as well as the key points for the design of channelizing reconstruction of at-grade intersection.

1工程概况佛山市顺德区龙江镇325国道交叉口位于龙江镇的西南部，由325国道、龙洲路、沙龙路3条干道交汇而成，属X型交叉口。3条道路的红线宽度均为70m，横断面布置，325国道为双向八车道，龙洲路、沙龙路为双向六车道。该交叉口原来是环形交叉口形式，在交叉口中央设置了一个直径60m的中心环岛，驶入交叉口的车辆一律绕环岛作逆时针单向行驶。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

Further study of this paper has shown that reason for"camel peak"phenomenon in the adhesion-creep test curves is difference between sliding-and static coefficient of friction and discussed the analytic formulae for line contact as well as one direction slip and special correction Lemk's method for point contact when their change is considered as stage jump function.

通过进一步的理论研究指出造成轮/轨粘着率与弹性滑移率实验曲线呈"驼峰"状的原因是滑动区和粘着区的动、静摩擦系数变化，给出了当它们为阶跃变化时线接触条件下的解析解和对点接触情况的独特的"修正"Lemke算法。

This text is based on the work that analyse the problem having emerged about large-scale economic affordable residential district of city at the moment, in instance of the patterns in Xi'an. Through investigating living circumstances and building present situation, there are lots of requirement for economic affordable housing in Xi'an. As large requirement for premise, the question about choosing location large-scale economic affordable residential district in city is researched. As time as, it should be refer to the problem which were founded in others cities, then summarize a correct choosing location model for the practical situation, it could determent the location of large-scale economic affordable residential district of Xi'an.

本文以分析现阶段城市大型经济适用居住区产生的问题为依据，立足西安地区，通过调查该地区居民的居住现状以及房地产开发状况，指出经济适用住房在西安地区具有广泛的需求市场，在这种巨大需求量存在的前提下，探讨大型经济适用居住区选址问题，结合现有其它城市大型经济适用居住区中发现的问题与不足，提出一套适合实际情况的选址模式，并且根据该模式分析了西安大型经济适用居住区选址的区位。

Finally, for painting to become that "art of balance, purity and serenity, with no troubling or disquieting subjects, so that for any mental worker, for example the businessman just as much as the artistic man of letters, it can be a soothing influence on the brain, rather the way a good armchair gives him relaxation from physical tiredness"(as he observed in 1908), Matisse pursued his original intuition through the great currents of art history over half a century: divisionism, fauvism and abstraction - without ever getting lost.

最后，成为该画的平衡，纯洁和宁静"艺术，没有麻烦或令人不安的科目，所以对于任何脑力劳动者，例如商人一样的英文字母艺术的人很多，它可以是一个安慰的影响对大脑，而不是一个很好的方式椅子给他身体的疲劳，放松"（正如他在1908年发现），马蒂斯的艺术追求，通过历史的伟大潮流他原来的直觉半个多世纪：divisionism，野兽派和抽象-而没有迷路。

There was an increasing demand for engine power due to industrial development. As early as the 2nd century BC, the ancient Greeks invented an engine that was powered by the reaction from spurting steam; in 1690, the Frenchman Barben invented the first piston steam engine. On the basis of his predecessors' work and with his own hard work and numerous trials and failures, James Watt invented the steam engine with connecting rod, flywheel and centrifugal speed governor in 1782.In 1784, the British government granted a patent to James Watt for producing steam engines, which signified that man had entered the age of the steam engine and also significantly expedited the beginning of the Industrial Revolution in 18th century Europe. By the 1830s, steam engines had been widely used in various sectors such as textile, metallurgy, coal mining and transportation; for example, the American Robert Fulton invented the steamboat and the Englishman George Stephenson invented the steam locomotive.

随着社会的进步，社会由农业时代进入工业时代后，对全用手工操作已十分不满足，人们随着工业发展对动力的需求日益突出，瓦特在前人研究蒸汽的基础上，甚至早在公元前二世纪，古希腊人创造的一种利用蒸汽喷射的反作用的发动机，以及1690年法国人巴比首先发明第一台活塞式蒸气机等，刻苦钻研，反复实验，经历无数次挫折和失败，终于在1782年发明了具有连杆、飞轮和离心调速器的双动作蒸气机，使之成为了可以实用的蒸气机。1784年英国政府授予瓦特以制造蒸气机的专利证书，这标志着人类进入了蒸气机时代，有力地促进了欧洲18世纪的产业革命。

The result shows that it will take on trend as follows: It is important for the biology pesticide in industry in the 21 century. Develop the biology pesticide as well as the chemical pesticide it is little poison and high effect to realize the superiority each other. It is the best prosperous for the development of the weedicide. It is good for the market foreground of the germicide.

预测结果表明，我省生物农药产业发展方向将呈现如下趋势：21世纪生物农药在农药产业中位居重要地位；协调发展生物农药和低毒高效化学农药，实现优势互补；除草剂的发展将呈现最旺的势头；杀菌剂的市场前景良好；三大类生物农药比例更趋合理，同时将会加强转基因抗性作物产品的开发与应用。

Best is Water of all, and Gold as a flaming fire in the night shineth eminent amid lordly wealth; but if of prizes in the games thou art fain, O my soul, to tell, then, as for no bright star more quickening than the sun must thou search in the void firmament by day, so neither shall we find any games greater than the Olympic whereof to utter our voice: for hence cometh the glorious hymn and entereth into the minds of the skilled in song, so that they celebrate the son[1] of Kronos, when to the rich and happy hearth of Hieron they are come; for he wieldeth the sceptre of justice in Sicily of many flocks, culling the choice fruits of all kinds of excellence: and with the flower of music is he made splendid, even such strains as we sing blithely at the table of a friend.

水为元素中的至善，黄金像火焰一样在高贵的珠宝中闪耀；若要歌颂竞技的荣耀，哦，我的灵魂，白昼的苍穹里没有比太阳更明亮的星辰，奥林匹亚竞技会是我们为之歌唱的首选：荣耀的赞歌由此而来，歌声铭刻在技艺精湛者心里，为此他们歌唱克洛诺斯伟大的儿子，歌声直抵西隆丰富而快活的心灵；他在西西里挥动公正的权杖，看护如云的羊群，他采摘果实，那精品中的精品：音乐的芬芳让他光彩夺目，这样的曲调我们甚至在款待朋友的宴会上欢歌。让我们拿起鲁特琴，光荣的神驹在比萨昂首奋蹄，沿阿菲奥斯河堤绝尘而去，无需鞭打或踢刺，它的主人，锡拉库扎的国王为马群笑逐颜开，荣耀无比。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。