测量误差

In order to use computer in the roundness measuring,the algorithm of verifying method must be written .

在圆度误差测量中，对误差的评定是重要的一环，目前国标中规定有 4种评定方法，其中最小区域圆法为推荐使用的方法。

To fulfill the need of the application of RP technique in medical domain, reverse CAD modeling from medical cross sections is systematically studied in this dissertation. Firstly, Some algorithms related to the research of this dissertation are studied. New algorithms for orientation and inclusion test for simple polygon, an error constrained automatic faring algorithm for B-spline curve and a theorem regarding the termination criterion for subdivision of triangular Bézier patch are proposed. Then based on similarity between contours of adjacent sections, a methodology for surface reconstruction from cross sections is presented. Finally, a virtual measuring method is proposed.

本文针对RP技术在医学领域应用的需要，系统研究了基于医学断层轮廓数据的反求CAD建模理论和方法：(1)在基础算法研究部分，提出了简单多边形方向及点在多边形内外判断的新方法、三角Bézier曲面片离散的误差控制定理和一种带误差约束的B样条曲线的自动光顺方法；(2)提出了一种基于相邻层轮廓相似性的医学断层轮廓数据曲面重构方法；(3)提出了一种称为"虚拟测量"的曲面模型处理方法。

The projection and distortion error can be reduced markedly through stereophotograph in a range of two metres.

拍摄距离为2米进行三维测量，可以明显减小投影误差和垂轴误差的影响。

SYSTEMATIC ERROR - the mean of a large number of measurements influenced by systematic error deviates from the true value.

系统误差－受系统自身分布误差影响的大量测量结果的平均值与真值的偏差。

Radon and thoron calibration factors are 1.78 and7.63 respectively , the relative error of radon concentration ERS-2 measured is 3.0%compared to the standard radon concentration and thoron is 3.2%. We deduced theequations which can eliminate the mutual interference between radon and thoronmeasurement .

通过 ERS—2 氡析出率仪器的研究，对 ERS—2 测量析出率中道址的选择以及扣除氡钍干扰问题进行了讨论，氡道道址设置为 60—115，钍道道址设置为 119—128，氡钍的刻度系数分别选为 1.78 和 7.63，测得的氡浓度与标准氡浓度的相对误差为 3.0%，测得的钍射气浓度与标准钍射气浓度的相对误差为 3.2%。

This paper analyzed the influence of the vertical axis tilt error of total station on angle measuring,and put forth the corresponding methods.

分析了全站仪竖轴倾斜误差对测角的影响，并提出了相应的解决办法；介绍了补偿器的原理；指出了在实际工作中如何正确使用全站仪以减少竖轴倾斜误差对测量结果的影响。

The algorithm can realize the error correction of INS under the noise of geomagnetic measurement data.

给出ICCP算法的设计思想并进行推广，使算法能够在地磁测量数据存在误差的情况下，实现对惯导的误差校正。

A method and system based on compensation for beam drift are put forward in order to measure pitch and yaw errors.

提出了一种带有光线漂移补偿的测量导轨俯仰角误差、偏摆角误差的方法及系统。

Then, 6 sets of error data under different temperature conditions are measured based on the proposed method, and the z-axis positoning errors are analyzed as examples.

基于这种方法，在不同的温度条件下测量了6组数控机床的空间定位误差，并以z轴定位误差为例进行了分析。

Firstly, the new single and combined analytic error models of cumulative geoid height influenced by four error sources including the intersatellite range-rate of interferometric laser ranging system, orbital position and velocity of GPS receiver and nonconservative force of accelerometer from GRACE Follow-On satellites are established using the power spectrum principle, respectively.

第一，基于功率谱原理分别建立了新的GRACE Follow-On卫星激光干涉星间测量系统星间速度、GPS接收机轨道位置和轨道速度以及加速度计非保守力误差影响累计大地水准面的单独和联合解析误差模型。

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。