查询词典 permanent error

But the error tolerance of Chahine iterative scheme is very small when using it to calculate the equation of Mies theory. The main reason is the anisomerous distribution of the light energy error on the detector.

在全量程范围内采用Mie理论计算时，Chahine叠代算法的误差容差限比较小，这主要是因为光能在光环检测器上的截断误差决定的。

After that, the space feature of the spindle rotating error movement and the error movement of a straight moving measurement—frame are also analysed, by which, the axile multiple—lift separating method and the one step by another step separating method are set up.

其次，分析了主轴回转误差运动和测架直行误差运动的空间特征，并以此为依据，提出了轴向多层分离法和逐次两步分离法。

Firstly, the article introduces the definition of error of lens center in the old and new national standard, and summarizes three present systems that can confirm the lens center. Then we discuss the theory and formula of self-collimation catoptric method. On the basis of self-collimation theory, some apparatuses were designed (including internal-focusing center scope and center error measure instrument etc).

首先介绍了新旧国家标准关于透镜中心误差的定义，归纳和总结了目前物镜装校定中心的三个体系，讨论了光学系统中心误差自准反射法测量原理、公式和测量方法，以及根据自准反射法测量原理而设计开发的定中心仪器——内调焦定心仪、中心偏测量仪等设备。

On the other hand, in few-cloudy and cloudy days, the error was 15.50% and 41.28% respectively which showed that error increases with cloudage.

误差随着云量的增多逐步增大，故模型在少云和多云的天气状况下不能很好地模拟实际情况。

Sphere fitting method, conicoid fitting method and line scanning curve fitting method are used to approach system error for the first time. The effect on the measurement error of each method is also analyzed.

首次利用球面拟合法、二次曲面拟合法以及行扫描曲线拟合法去逼近系统误差，并分析了各种方法进行系统误差校正时对最终测量误差的影响。

The result indicates that conicoid anti error is smaller than that of plane and three cubed anti error fitting model, but the validity of the model doesn't necessarily have relationship with model steps.

结果 二次曲面抗差的结果要好于相关平面与三次曲面抗差的结果精度，并非抗差模型阶次越高有效性越高。

An objective function was proposed to evaluate the minimum zone cylindricity error. The error model was optimized by genetic algorithm.

建立了圆柱度误差最小区域评定的目标函数，并利用遗传算法对目标函数进行寻优。

The experimental results indicate that the instrument error can be more completely separated using the researched method in the paper. So, the precision measurement for the cylindricity error can be realized.

实验结果表明，本文提出的圆柱度误差分离及重构方法可以比较完整地分离出仪器误差，从而实现圆柱度误差的精密测量。

The cylindricity could be calculated by least squares method and wavelet error separation method that the measurement error could be decomposed by Harmonic analysis algorithm based on wavelet theory.

针对激光 CCD 灵敏度高，干扰噪声容易混入测量数据中的问题，提出了一种基于小波分析的误差分离方法，即运用谐波分析的思想方法和小波理论中多频率分析算法进行误差分离，误差分离后的数据用最小二乘法处理求出圆柱度。

Aiming at precision measurement of cylindricity,this paper puts forward a kind of method which can sep- arate the cross- section roundness error,the radius error of different cross sections,the initial coordinates of least square centers of measured cross sections and can reconstruct the pattern of the measured cylinder,i.

本文针对圆柱度误差的精密测量，提出了一种可分离截面圆度误差、截面半径差和截面最小二乘圆心初始位置并重构出被测圆柱形貌的方法，即三点法圆柱度误差分离与重构技术。

We have something to do in the new stage.

在这段崭新的时期中，我们有一些要做的。

The difference between tourism decision-making under uncertainty and risky tourism decision-making is indistinctive.

其中不确定性旅游决策和风险旅游决策的界线比较模糊，两者的区分是相对的。