查询词典 optional course

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。

The category and number of arguments in the semantic structure of sentences in modem Chinese are represented as follows: 1 Subject, which is composed of agent, causer, sensor, possessor, carrier 2 Object, which is composed of patient, factitive, position, undertaker, causee, phenomenon, involvement, attribute 3 Alternative participant, which is composed of recipientlsource, collaborator 4 Complement The predicate and the argument constitute the basic predication structure, which becomes an extended predication structure in the presence of an adverbial argument, which is an optional semantic constituent in the semantic structure.

为此，本文把现代汉语动词按其跟相关语义成分的依存关系首先分为动作动词、致使动词、心理动词、性状动词、关系动词5大类，以确定各主事动元的类别；第二层级按动核所带动元的数量，对各类动词进行下位分类，分别得出一元动词、二元动词、三元动词，以显示动核所带动元的数量：第三层级按动核所带动元的性质和数量把现代汉语动词分为24个基本类，以确定动元即必有语义成分的基本类别和数量。

Test results equivalent to ASTM D613 for Cetane Number of diesel fuels （Optional with K88612）?

测试结果相当于美国ASTM D613的十六烷值的柴油燃料

I have modified Jack's function to use MFC and use optional character in the wildcard string.

我已经修改杰克的功能，使用MFC和使用通配符的字符串择性质。"/页"

Clothing, clothing store, womens clothing, vintage clothing, womens clothing shop, man clothing, baby clothes, maternity clothes, child clothing, kid clothing, clothing retailer, wholesale clothing, clothing accessory, plus size clothing, woman 39 s clothing, designer clothes, hollister clothing, sexy clothes, lrg clothing, doll clothes, teen clothing, express clothing, urban clothing, wet clothes, hip hop clothing, junior clothing, h m clothing, plus size womens clothing, used clothing, motorcycle clothing, clothing optional, plus size woman clothing, man 39 s clothing, american eagle clothing, charlotte russe clothing, the limited clothing store, athletic clothing, newport news clothing, clothing wholesaler, clothing manufacturer, ed hardy clothing, new york and company clothing, rainbow clothing store, child 39 s clothing, ross clothing store, h m clothing store, ski clothing, boy clothing furnishing retail, hollister clothing store, car clothing com ebay, bape clothing, girl clothing, dance clothing, dog clothing, accessories, womens clothing shoes shoes, sports clothing, gothic clothing, clothing design, hawaiian clothing, aeropostaleclothing store, woman clothing, clothing catalog, g unit clothing, charlotte russe clothing store, bebe clothing, clothes shopping, clothing label, wholesale designer clothing, latex clothing, revolve clothing, forever 21 clothing, womens clothing store, big and tall man clothing, western clothing, against all odds clothing, affliction clothing, medieval clothing, south pole clothing

服装，服装店，妇女的服装，经典的衣服，妇女服装店，男子服装，婴儿服，产妇服装，儿童服装，儿童服装，服装零售商，批发服装，服装配件，再加上大小的衣服，女子39狼，名牌服装，霍利斯特服装，性感的衣服，地方政府举债服装，玩具娃娃衣服，青少年服装，快速的衣服，城市服装，湿衣服，嘻哈服装，初级服装，陛下的衣服，加上大小妇女的衣服，旧衣服，摩托车，服装，服装可选，加上大小女人的衣服，男子39狼，美国鹰服装，夏洛特russe衣服，有限的服装店，运动服装，纽波特纽斯服装，服装批发，服装制造商，教育署的Hardy服装，纽约和服装公司，彩虹服装店，儿童39狼，罗斯服装店，陛下服装店，滑雪服装，男童服装提供零售，霍利斯特服装店，租车服装通信易趣，巴佩服装，女童服装，舞蹈服装，宠物狗服饰，装饰品，妇女服装鞋子鞋，运动服装，哥特式服装，服装设计，夏威夷服装， aeropostaleclothing商店，妇女的服装，服装目录，克单位服装，夏洛特russe服装店，贝贝服装，服装商场，服装品牌，时尚的服装批发，乳胶服装，围绕服装，服装永远21 ，妇女服装店，大高个儿服装，西式服装，克服一切困难衣服，痛苦服装，中世纪的服装，南极服装

Various other fittings can be attached and an optional chin rest .

其他各种配件可以附加一个可选的下巴休息。

Results By using optical microscope,the neurocytes of hippocampus in experimental group were observed to denaturalize,tumefy,destroy and disappear.And under electron microscope,the karyon was irregular,nucleoles deviated,chondriosome tumefied,crista collapsed,membrane was damaged,substance cavitated.Such changes were more evident with the increased paroxysm of epilepsy,the parameters between control group and operation group had no difference（P＞0.01）.But make a monofactorial variance analysis among cells' number,area,circumference and integral optical density in different groups,it showed that there were significant differences between optional two groups（P.01;at the same time,the more serious injury in hippocampus,the more powerful GFAP immunoreaction was.

结果： 实验组海马区光镜下可见神经细胞变性、肿胀、坏死及神经细胞脱失改变，电镜可见细胞核形态不规则、有切迹、核仁偏位、线粒体肿大、嵴断裂、膜破损和基质空化等改变，随癫痫发作次数增加上述改变越明显，对照组与手术对照组比较，各参数差异无显著性（P＞0.05），将不同组别大鼠细胞数、面积、周长、积分光密度分别作单因素方差分析，不同组别间均差异有显著性（P.01），同时观察到海马区GFAP免疫反应阳性的胶质细胞随海马损伤的加重而GFAP免疫反应增强。

The exemplary ergonomics are classic Audi though, as is the liberal usage of fine materials such as aluminium, exclusive woods, chrome, leather and Alcantara, as well as a large selection of optional design packages.

人体工程学的典范，虽然是典型的奥迪，如所引起的优良材料，如铝自由使用，专用木材，铬，皮革和Alcantara，以及设计的可选包可供选择。

This is the 3rd part of an optional fill for the Chronology.

这是一个可选的纪年填写第三部分。

Meanwhile, it could be seen that there does not exist a confidence interval with width less than 0.5 because of the property of Poisson distribution. Based on these conditions, the author mainly carried out research into two aspects of this problem as follows. Firstly, by numerical and theoretical analysis, the author compares some existent confidence intervals, for example,"exact" confidence interval, Wald confidence interval and Bayesian confidence interval, and finds some deficiencies points of the confidence intervals, whose modification version has been proposed .Also, several better confidence intervals such asare also presented .Secondly, for given confidence coefficient and interval width, the author constructs a class of asymptotical two-stage interval estimate procedures. At the same time, under varies restriction of confidence coefflcientent interval width, the optional sample size of the first stage has been computed by numerical computation. The numerical computation shows that the method considered in this dissertation have good properties and applied value.

同时，由于Poisson分布的特性，我们知道不存在其参数区间长度小于0.5的置信区间，基于这些情况，我们主要展开了以下两个方面的研究：一是利用数值计算分析与理论分析的方法对现有的若干置信区间如"精确"置信区间，Wald置信区间，Bayes置信区间等进行分析比较，发现了一些缺陷，针对这些缺陷，我们进行适当的修正，并得到几种性质较好的置信区间如：修正大样本区间Jeffreys原则下置信区间二是针对已给定的置信系数与区间长度，我们提出了一种渐近的两阶段区间估计程序，并利用数值计算的方法，在各种置信系数与区间长度限定下，算出了最优的第一阶段观测次数，大量数据表明，本文考虑的方法性态良好，具有应用价值。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？