查询词典 measuring

The method of measuring interest rate risk including duration,modified duration and convexity,is investigated.

文章对目前广泛应用的利率风险度量方法包括久期、修正久期和凸度进行了深入分析。

The convexity of surface is a important measuring parameter of sur-face.

曲面的凸性是衡量曲面的一个重要参数。

By measuring the cooling curve and quench severity of quenching oil at various flow rates,the relationship among the hardening capacity ,quench severity and flow rate was established.

对淬火油在不同流速下的冷却曲线和淬火烈度进行了测量，建立了硬化能力、淬火烈度与介质流速三者之间的关系。

This dissertation addresses a practical data processing method of free-form surface for the coordinate measuring machine, including fitting algorithm, probe radius compensation and surface matching .

以坐标变换理论和最优化算法为基础，提出了应用单纯形法，对原始测量点进行坐标平移和旋转变换，将理论坐标与实际坐标统一起来，在此基础上进行误差处理，从而较好的解决了曲面匹配问题。

On hardware and software, the measurement system for measuring the BGA coplanarity is designed and discussed.

分析了频移阴影莫尔测量技术的原理，测量系统和测量过程以及影响测量精度的因素。

In order to improve the measurement speed and meet the demand of dimensions of surface, shadow moire profilometry based on frequency shifting technology for measuring the BGA coplanarity is analyzed.

为了提高测量速度，满足表面外形尺寸的在线检测，针对频移阴影莫尔测量方法在BGA引脚共面度检测中的应用进行研究：(1)介绍了光学三维传感技术的概况及应用现状，简要叙述了光学三维轮廓测量技术的发展及原理。

The key technologies in shadow moire profilometry based on frequency shifting technology for measuring the BGA coplanarity are analyzed, and the relevant methods of improvement are discussed.

从系统硬件和软件算法两方面结合实验对频移阴影莫尔测量技术中的关键问题进行了探讨，给出了可行的改进方案，包括为了三组线光源归一化采用了光强校正的方法；为了求解高度值的快速方便采用了查找表的方法等。

Some key problems of line structured light sensor is given comprehensive studies theoretically and practically, which include the analysis of sensor's mathematic model; the improvement of the key parts of the sensor, the light source and imageforming system; the method of on-line measurement and the evaluate of BGA coplanarity. These studies are supported by corresponding satisfactory experiments. This dissertation covers the following aspects concerning the main work and creative research in the subject: 1. The operating theories and features of pattern measuring methods are systematically introduced.

本文成功地将线结构光传感器应用于BGA芯片管脚共面性的在线测试，并针对线结构光传感器测量的一些关键问题进行了深入细致的研究和探讨：建立了线结构光传感器的模型并对结构参数进行了详细的分析，针对传感器的关键环节—光源和成象系统的改进都提出了创新性的理论和方法，对管脚形状比较复杂的BGA芯片球栅阵列的在线测试方法和评定方法进行了理论研究和实验分析，并获得了满意的结果。

In the beginning, we describe the definition of coplanarity and warpage in electronic industry, and improve the original method to search coplananrity in a shorter period of time. Then, we introduce the original theory of Shadow Moire, and establish optical measuring system by using Shadow Moire method, phase shifting method, phase unwrapping method…etc.

首先叙述电子元件所定义的共面性与翘曲量原理，并改变原搜寻方式，以较少的时间搜寻共面性；接著介绍阴影叠纹法原始立论基础，并加入相位移法、相位展开法。。。

Using copula for measuring dependence takes more attentions in recent years.

近些年来利用copula刻画随机变量间相依性的理论越来越受到人们的关注。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。