系统误差

For non-Kolmogorov turbulence, the anisoplanatiam error, the angular correlation function of Zernike polynomials, the residual phase structure function and the long-exposure OTF after low-order modes correction are analyzed.

分析了非科尔莫戈罗夫湍流情况下，自适应光学系统低阶模式校正时的非等晕误差、泽尼克系数角相关函数、残余相位结构函数以及长曝光光学传递函数，并定义了一个新变量模式校正因子，用来有效评价目标非等晕误差对低阶模式校正自适应光学系统补偿效果的影响。

In this method, two fuzzy logic systems are used to approximate unknown functions, and an error compensator is designed to reduce the influence of approximation error on tracking accuracy.

针对一类非线性系统提出了间接自适应模糊控制方法，该方法用模糊逻辑系统逼近未知函数，并设计误差补偿器来减少逼近误差对跟踪精度的影响。

The arc data interpolation error by secant, tangent and chord, and the smallest error by secant mode is analyzed in this paper. The relation between the maximum radial error and arc radius and approach step-length in the secant mode of arc data interpolation in CNC system is detailed.

在分析数控系统圆弧数据插补割线方式较切线、内接弦插补方式误差更小的基础上，讨论了数控系统圆弧数据插补割线方式中最大径向误差与圆弧半径和逼近步长的关系。

During 3D seismic data acquisition in Berri Block of Saudi Arabia,GPS navigation system was used while shooting,and monitoring shot-point drift on the interface of GPS navigation system,to initially control shot point error. Then,the method was applied to control seismic data acquisition quality,to analyze and examine shot-point drift and receiver-point drift.

在沙特Berri工区三维地震数据采集过程中，首先在放炮时采用GPS导航系统，在导航系统监控软件界面上监测炮点偏移情况，初步控制炮点误差；然后利用基于最小偏移距分选方法对地震数据采集质量进行监控，并对炮点和检波点偏移误差进行分析和检查。

And by comparing the actual clock, find out the source of the error and determined the method of adjusting error, reduce errors as much as possibly, so this system can achieve a practical digital clock with error within the permissible range.

并且通过对比实际的时钟，查找出了误差的来源，确定了调整误差的办法，尽可能的减少误差，使得系统能达到实际数字钟的允许误差范围内。

And by comparing the actualclock, find out the source of the error and determined the methodof adjusting error, reduce errors as much as possibly, so thissystem can achieve a practical digital clock with error within thepermissible range.

并且通过对比实际的时钟，查找出了误差的来源，确定了调整误差的方法，尽可能的减少误差，使得系统可以达到实际数字钟的允许误差范围内。

Though ultra precision lathe developed by HIT have higher manufacturing accuracy, it has no ability to compensate for errors. If on the foundation of old CNC system, a valid error compensation system were added, the manufacturing accuracy of the lathe would be improved largely, at the same time theory and methods used in this paper can be applied to other machine too1s, So the study in this paper have both the significant theoretical meanings and the practical value.

哈工大研制的超精密车床虽然具有相当高的加工精度，但是其数控系统本身不具有误差补偿功能，如果在原数控系统的基础上，增加误差补偿控制系统，该车床的加工精度将有大幅度提高，同时文中所用理论和方法也适用于其它机床，因此本文的研究具有重要的理论意义和应用价值。

Before cell injected, the error matrix is calculated from servoing control equation to calibrate injection system , by which the coordinate transform error between vision system and micromanipulator system is minished.

细胞注射前，利用伺服控制方程计算的误差矩阵对系统进行标定，减小显微视觉系统和机械手系统间的坐标变换误差。

The corrected values in series to be used for correction of multi- range measuring errors of laser resistor trimming machine are adaptively obtained by measuring and calibrating the measuring errors of high precision standard resistors, and they can be used to correct all the resistance measuring errors of resistors to be adjusted to further reduce the system measuring errors.

通过测量和标定高精度标准电阻的测量误差，自适应地获取校正激光调阻机多档测量误差的系列修正值，进而用系列修正值对所有待修调电阻的阻值测量误差进行校正，达到进一步减小系统测量误差的目的。

As reported, the celestial guidance of single-star scheme can correct initial localization, orientation errors and constant drifts of gyro in mobile launching ballistic missile, while we consider that the scheme can only compensate for partial constant gyro drift .

有参考文献认为，采用单星制导即可以估计和补偿初始定位误差、初始方位误差、陀螺常值漂移等误差源导致的弹载惯导系统定位误差，但我们认为，单星制导不能估计出全部的常值陀螺漂移。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。