查询词典 accuracy of measurement

Reasonable baseline is one of the key matter in the straightness measurement. Two schemes of the measuring basis are advanced in the paper--tensile spring and laser beam, based on the request and character of guide-ways straightness measurement. In early study, we come to the conclusion by theoretical analysis and experiment that the laser beam basis has more advantage in development and accuracy.

合理的直线基准是实现直线度测量的一项关键内容，本文首先针对导轨直线度的测量要求与特点，提出了张丝与准直激光束两个测量基准方案，并在前期研究中通过理论分析与大量的实验对比得出结论：激光束在系统实现及测量精度等方面均具有更高的优越性。

Compared with the widely used projection lens coma measurement method TAMIS, the accuracy of coma measurement is increased by 20%.

标 签 光学测量光刻机彗差套刻误差投影物镜 optical measurement lithographic tool coma overlay error projection lens

The structure and function of the automatic loading measurement control system of train trestle bridge are introduced, and the testing method of measurement accuracy is put forward.

论述了火车栈桥自动装车计量控制系统的构成及功能，并提出了计量准确度的测试方法。

In dual-frequency laser interference measuring system Wollaston prism is an indispensable and important device,which can separate the incident beam in to measurement beam and reference beam according to the polarization direction of dual-frequency laser,so as to realize the high accuracy measurement.

在双频激光干涉测量系统中，Wollaston棱镜是不可缺少的重要光学元件，它可将双频激光按偏振方向分为测量光和参考光，从而实现高精度测量；但是，如果Wollaston棱镜的安装方位相对入射光线方向以及与聚焦透镜距离不同时，测量结果将会不同。

In the paper, a brand new measuring proposal which developed the foundation of conversional grating measurement has been introduced. It applies the electronic ocular (which essential element is CMOS image sensor) to the length measurement and uses the digital image processing technique subdivide the grating image in order to improve the distinguishability and accuracy of the system, and make the data processing, saving and transmission much more easier in the meantime.

本课题在现有的光栅计量基础上提出了一种全新的测量技术方案：结合现有的光栅计量技术，以电子目镜(核心元件为CMOS图像传感器)作为光电转换器件应用于长度测量系统，并采用计算机图像处理技术对测量的光栅图像进行数字化细分，以达到较高的系统分辨率及测量精度，并且使测量数据的处理、保存和传输更加简便。

In addition, InP technology provides the following measurement benefits compared with other technologies available today: significantly flatter response at high frequencies; higher measurement accuracy because of the low-noise, nonconductive substrate; and higher reliability due to lower power consumption.

相较于其他的技术，InP技术还提供许多量测优点：在较高的频率下，可产生相当平坦的响应；低噪声的非传导性基板，可提高量测准确度；低消耗功率，可确保较高的可靠度。

The conditions to measure accurately and the principles to select parameters of the multi— probes EST method are proposed, and the theoretical research, computer imitation and the experiment on a machine tool prove that these principles and suggestion are necessary and effective. The influence of the initial value errors of the probes, the installation error of the probes system, and the remaining error caused by the radical error motion are analyzed quantitively on the measurement accuracy of the multi—probes EST method. The influence of the error caused by the probe's axes which is not in a plane and the perpendicularity error of the plane which the probe's axes is in to the stational axis are discussed on the measurement results.

结合理论分析，对这些EST方法进行了计算机仿真分析和研究，重点研究了这些方法的应用条件和误差分离精度，所得出的结论是：三测头法EST基本上能实现各项误差的完全分离，适于在位测量使用；二测头法在恰当地选择测头安装角的条件下，可以得到较高测量精度，适于大型零件圆度、圆柱度、径向圆跳动和全跳动的在位测量；对置两测头时域法可以在一定程度上改善单测头法测量精度，但对随机径向误差无能为力；对置两测头频域法存在严重的谐波损失。

Principle of flow measurement is deduced,and the factors that affect measurement accuracy are analyzed.

对流速测量原理进行推导，并对影响测量精度的因素进行了分析。

A magnetic interference compensation method is presented to compensate the effects of interference magnetic field on the azimuth measurement of digital magnetic compass and to ensure the measurement accuracy of the compass.

介绍了一种磁干扰补偿的方法，可以补偿干扰磁场对数字磁罗盘方位测量的影响，保证数字磁罗盘的测量精度。

The series used circles with transmission, guaranteeing her balance quality and accuracy, ring belt transmission loading convenient, efficient measurement series using JP-380 computer measurement systems, rotational speed, money, phase visual shows, rotors six types can be optional, and can remember the volume imbalance, and other devices can use piezoelectric-type sensors, and the output volume is large, and both small and performance stability.

本系列采用圈带传动，保证了工件的平衡质量及精度，圈带传动装卸方便，工作效率高，测量系列采用JP-380微机测量系统，转速、量值、相位显示直观，转子的6种类型可任选，并能记忆不平衡量，机电换能器采用压电式传感器，输出量大、体积小、性能稳定。

Over the years, he has served as a consultant to a number of governmental agencies, nonprofit organizations and companies including, World Bank, United Nations FAO, Engineering Science Consulting Firm; Foster Farms; Calgene; Plant Genetics; California Farmers Rice Cooperative; Upjohn; Eureka Laboratory; and Seminis companies in the US.

多年来，耿旭教授作为顾问为许多国际机构、组织和大公司提供咨询服务，包括世界银行、联合国粮农组织、工程科学咨询公司、佛斯特农业公司、CALGENE公司、植物基因公司、加州稻农协会、UPJOHN公司、优利卡实验室、SEMINIS 种子公司等。

Some people spoke in contempt of the government .

有些人以轻蔑的口吻议论政府。