查询词典 forward difference

A suspension system installed between a chassis having side rail members and cross frame members and an axle of a vehicle, said suspension system including a step spring having a forward generally horizontal section having a leading end, a rearward generally horizontal section having a trailing end, a generally vertical section between and contiguous with the forward and rearward sections and displacing the rearward section below the forward section, said leading end of said step spring being pivotally attached to said chassis, spring means extending between said chassis and said trailing end of said step spring and said axle being pivotally secured by print means to a mounting means on said forward generally horizontal section, said pivot means being above said axle.

悬架系统安装底盘之间的铁路有一方成员和跨帧成员和车轴的车辆说，悬挂系统包括一个步骤春天提出了总体水平有一个部分领导为此，后面一节一般水平落后了年底，一个普遍的垂直节之间和相邻的前进和向后章节和取代后面一节一节向前说，领导说，年底春天正在一步至关重要重视底盘说，春季是指说，延长底盘之间，并表示尾随说，年底的一步春天，并表示正在车轴至关重要担保印刷手段越来越方式表示着一般水平段说，转身意味着上述表示的轴。

The thesis consists of five chapters: chapter one discusses the correlative theory of Logistics, then dissertates the condition and current of modern Logistics and the problems of Chinese Logistics. Chapter two introduces and analyzes the develop actuality of Chinese railway freight forward enterprises. Chapter three discusses the primary theory of Third Party Logistics. On this basic, it analyzes the actuality of Chinese railway Third Party Logistics, and finds the leading factors that influence the development of Third Party Logistics enterprises. Chapter four offers the concept of modern Logistics reengineer, and then analyzes it with SWOT. On this basic, the thesis brings forward that the way which Chinese railway freight forward enterprises become modern Logistics enterprises. At last, it prospects the future of railway freight forward enterprises developing modern Logistics, including the current of global Logistics and Internet. Chapter five enumerates two representative and successful cases from domestic and overseas of railway Third Party Logistics enterprises.

本文共分五章，第一章从物流的相关理论出发，论述了现代物流的现状和发展趋势以及我国物流发展历史回顾及存在的问题；第二章介绍并分析了中国铁路货运代理企业的发展现状；第三章介绍了第三方物流的基本理论、国内外第三方物流发展现状以及第三方物流市场供需状况，并在此基础上对我国铁路发展第三方物流的现状进行分析，找出了影响第三方物流企业发展的主要因素；第四章给出了现代物流再造的概念界定，然后对其进行了SWOT分析，并在此基础上提出了中国铁路货运代理企业向现代物流转型的对策，最后对铁路货运代理企业发展现代物流进行了展望，主要包括全球物流发展趋势和互联网发展趋势；第五章列举了中外两个比较典型的铁路发展第三方物流的成功的案例，分别是法国铁路公司的公铁联运和汽车物流和中铁联合物流有限责任公司。

In conclusion, the results of multilevel model analysis showed that the GERD score of resident in Wuhan was relatively higher and had significant difference with that in Guangzhou, however, that in Shanghai, Beijing and Xi\'an had no significant difference compared with that in Guangzhou. That is to say, the prevalence of GERD in Wuhan was relatively higher compared with the other four survey sites; the residents'health status more worse, the GERD score more higher, and the influence of health status on GERD score was also effected by the region difference between Wuhan and Guangzhou; residents lived in rural region with lower education level, worse spirit status were more likely to suffer from GERD; Moreover, those residents who had family history of GI tumors or other GI diseases, some anamneses (such as dyspepsia, gastritis, rheumatic arthritis), and some diseases (such as irritable bowel syndrome and aerophagia) were also more likely to report GERD. However, no significant association was found between GERD and some other factors in this survey, such as sex, age, etc.

总之，多水平模型分析结果显示，与广州相比，上海、北京和西安居民的GERD总评分没有明显的差异，而武汉居民的GERD总评分则相对较高，即表示武汉的GERD发病率在5个调查城市中相对较高；居民的总体健康状况越差，其GERD总评分越高，且其对GERD总评分的影响受到武汉与广州之间地域差异的影响；农村居民、文化程度越低、精神状况越差者更容易患GERD；另外，那些有胃肠道疾病或肿瘤家族史，既往患有胃炎、消化不良、风湿性关节炎，现患有肠易激综合征、吞气症的人，患GERD的可能性更大，而性别、年龄等因素，本研究未发现其与GERD有显著的关系。

The scattering properties of particles with different shape parameters are simulated respectively in the modes of reflection and refraction. Both in the modes of reflection and refraction, the phase difference of non-spherical particle's PDA signal is the unbiased estimate of the corresponding phase difference of ideal spherical particle, and the standard deviation of angle roughness scale on particle surface impacts little on the distribution of phase difference.

本文通过物理光学的方法分析了非理想球形粒子的散射特性，利用物理光学中的稳相点理论，导出了非理想球形粒子散射光的相位表达形式，分析了非理想球形粒子的形状对PDA信号相位及相位差的影响，建立了非理想球形粒子的尺寸分布与PDA信号相位差分布之间的关系。

To against an afterload of 1.96kPa(200mmH_2O), measure two groups of direct flow and antidromic flow, both begin with the pressure difference of 0mmH_2O, add more 20 mmH_2O every time ,measure three tines at each pressure difference, get the average value at each pressure difference.

测试分为顺向和逆向两组，在克服后负荷压强为1.96kPa(200mmH_2O)情况下，分别从0mmH_2O压力差开始，每隔20mmH_2O递增，测量通过静脉外间接人造瓣膜的生理盐水流量，每个压力差值测量3次，取平均值。

The structure of the execution organizations: Three kinds of differences were presented, including natural difference, functional difference between central and local organizations, and difference in division of decision-making.

一、在执行组织结构方面：呈现机关属性的先天差异、中央与地方的功能差异，以及事权划分的纠葛等三项分殊性。

Two new rules represented in equality for Demyanov difference: the Demyanov difference of summations of two pairs of convex compact complementary sets;the Demyanov difference of a set, which is the convex hull of finite number of convex compact sets, and a convex compact set complementary to these sets,are given.

为此给出了两个关于Demyanov差的新的用等式表述的运算法则：两个彼此互补的凸紧集对的和的Demyanov差，有限个凸紧集的凸包和与这些凸紧集正交互补的凸紧集的Demyanov差。

In chapter 5, we study necessary conditions for difference sets and we obtain the following: we proved that there are no nontrivial difference sets in dihedral group of order 4p〓, where p is a prime, d is a positive integer; we give a necessary condition for Hadamard difference sets in some group of order 4p〓, and completely solve a general case left in Dr.

在第五章中，我们研究了差集存在的必要条件。

This paper is an investigation of the differences between monosyllabic and disyllabic time adverb as a synonymy which display in three aspects: the difference of syllable of the modifying object,the difference of pragmatic rank and the difference of grammatical function.

同义的单音节时间副词和双音节时间副词之间，存在三个方面的差异：修饰对象的音节差异、语用移位的差异以及语法功能的差异。

And the heat transmission model is computed with FEM. Then the paper analyzed rules of difference in temperature. Different in temperature is divided into transverse temperature difference and lengthways difference, and corresponding formulas are respectively presented.

并在此基础上，进行了导热问题的有限元分析，得到了温差分布规律，将计算温差分解为横向温差和纵向温差几，并建立了相应的温差计算公式。

Bob Eckert has been chairman and chief executive of Mattel for eight years.

美泰董事长兼首席执行官鲍勃·埃克尔特在任已8年。

The outlook for honors and disgraces carries on and surpasses the traditional outlook for honors and disgraces theoretically, and carries on and develops the theory of construction of socialist mora...

社会主义荣辱观的提出在理论上是对传统荣辱观的一次继承和超越，是对社会主义道德建设理论的继承和发展，在实践上有利于形成良好的社会风尚。