计算误差

Based on a FE model of a three-span continuous rigid frame bridge, the updating effects of the three techniques have been evaluated when different model information, different structural parameters and different level of noise are considered.

基于一座三跨刚构－连续梁桥有限元模型，通过七种不同工况的模型修正计算，研究了这三种方法在不同模态信息量、不同误差参数以及不同噪声水平下的修正效果。

When measuring, based on the segmented contour line of thread, we used the compiled measurement program to calculate and measure the geometrical parameters of the internal taper thread as pitch, half of thread angle and taper angle. Precisions of pitch, half of thread angle and taper angle reached ±0.012mm,±0.17° and ±0.018°. The results satisfied with the technique requirement of production. The reason of error was analyzed.

在测量尺寸时，使用自编程序计算测量内螺纹的螺距、牙型半形及锥角，测量精度分别达到±0.012mm、±0.17°和±0.018°，满足产品的技术要求，并分析了误差产生的原因。

It accord with the change tendency of the wind turbine theory.

并和实验值进行比较，发现计算值和实验值有一定的误差，但是与实验值的变化趋势相同，表明小翼对风力机确实起到的动力放大的作用。

A floating displacement static analysis model of basic floating part of 2-stage star gear train was presented.

建立星型齿轮传动静力学系统基本浮动构件浮动位移分析的弹簧-质量模型；采用静力学分析的方法，考虑系统的误差、工况条件、构件的弹性变形等条件对系统浮动位移的影响；计算系统基本浮动构件浮动位移；分析系统主要设计参数对各构件浮动位移的影响，为星型齿轮传动系统浮动机构的设计提供依据。

A floating displacement static analysis model of basic floating part of 2-stage star gear train was presented.

摘 要：建立星型齿轮传动静力学系统基本浮动构件浮动位移分析的弹簧-质量模型；采用静力学分析的方法，考虑系统的误差、工况条件、构件的弹性变形等条件对系统浮动位移的影响；计算系统基本浮动构件浮动位移；分析系统主要设计参数对各构件浮动位移的影响，为星型齿轮传动系统浮动机构的设计提供依据。

The commonly methods to adopt in roundness and sphericity assessment always have the property of complicate computation or are out of specification in national standards. Based on the advantages of Cumulative-Sum-Method, the paper proposes to compute the ideal circle and sphere, and assess roundness and sphericity.

针对圆度和球度误差评定中常用方法不符合国标定义或计算复杂的问题，根据普通累积法的优点，提出了运用普通累积法拟合理想国和球，进行圆度和球度的评定。

A algorithm for using the minimum zone to evaluate the space linearity error based on the principle of coordinate transformation is introduced,and the mathematical model and calculation example are given in this paper.

介绍了一种用基于坐标变换原理的最小区域法评定空间直线度误差的算法，并且给出了数学模型和计算实例。

This paper introduces magnetic measuring technique to measure the accurate length of wire strand online rapildy,analyzes remanent magnetism of wire strand,magnetic cavity and the relationship between wire strand movement speed and measuring accuracy and in detail introduces design, digital filtration ,undetected monitor and error calculation of magnetic module,remanent sensor and measuring circuit.

深入分析了钢丝绳的剩磁特性，以及励磁磁隙、钢丝绳运动速度与检测精度之间的关系；对励磁模块、剩磁传感器和检测电路的设计以及数字滤波、漏检监测、误差计算等进行了详细说明。

The methodology proposed in the paper was illustrated by an example, from which the information of the maximum error of the reliability analysis caused by the correlation coefficients and the effect of the correlation coefficient on the reliability analysis was obtained.

实例计算以及编写的相应分析程序获得基本随机变量间相关系数引起的最大可靠性分析误差、对结构可靠性的影响程度等信息，说明了本文的方法在工程实际中的应用。

The article elaborates the basic theory and mathematics model of ablating cornea by Excimer Laser, makes out the model which partition the cornea ablation area to 30 or 60 ablating circles, and arrives at the error of real calculation corve and academic model curve by comparing a with them under the help of MATLAB software, achieves the success of coney experiment and blind eyes' experiment, thus establishes the clinical experiment basis of cornea ablation in advance.

文章论述了准分子激光消融眼球角膜的基本原理和数学模型，提出了把角膜治疗区域有目的地划分成30个或60个消融道的模式，通过MATLAB软件把理论计算曲线和实际模型曲线进行比较，得出它们的消融误差，并且成功进行了动物实验和盲眼实验，提前为角膜屈光的临床实验奠定了基础。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。