1) three-point method
三点法
1.
Measurement techniques of cylindricity with three-point method;
圆柱度的三点法测量技术
2.
The application of Error Separation Techmique or EST to the on-line measurement of straightness error with three-point method is studied.
对三点法误差分离技术（ＥＳＴ）应用于在线测量直线度误差进行了研究，并在推导数学模型的基础上进行了仿真计算。
3.
In this paper a new method, three-point method, for solving the laser beam drift in its directions is presented.
提出运用三点法补偿激光束不稳定性误差,在时间和空间上获得较稳定的激光束。
2) Three point method
三点法
1.
The principle of three point method and its variation including two point method and four point method for roundness error separation was introduced.
论述了圆度误差分离的三点法及演化形式——二点法和四点法的基本原理 ,通过分析它们各自的特点和测量精度指出权函数的取值是影响测量精度的关键因素 ,应通过合理选择测量系统参数以避免谐波抑制的发生 ,而且应针对具体情况选择适当的圆度误差分离方
2.
Aim To improve the accuracy of measuring roundness and spindle mo tion error with three point method.
目的研究进一步提高三点法测量圆度及轴系运动误差精度的方法。
3.
In order to improve the measuring accuracy and efficiency,a high accuracy inspecting system for measuring the centroid and centroidal deviation of bullets based on three point method is designed.
为了提高其测量精度和效率,设计了基于三点法的高精度弹丸质偏心测量系统,介绍了测量原理、计算公式和测量设备,分析了测量误差产生的因素,提出了一种多测试平台和自动调平以及弹体自动旋转90°的设计思想。
3) three points method
三点法
1.
The ballistic equation to the remote-controlled missile by using three points method is a complex differential equation,and mostly it s difficult to solve,we can only get the approximate value with numerical solution.
三点法遥控制导的弹道方程是一个复杂的微分方程组,在一般情况下很难得到解析解,只能通过数值解法得到近似解,但为了进一步研究导弹的弹道特性,求解其解析解是很有意义的,文中就特殊情况下的弹道方程求出了它的解析解,并通过实例绘出了弹道曲线。
2.
The three points method determining bulk density during measuring soil water retention characteristics was put forward.
利用离心机法测定了黄土高原6种典型质地土壤的吸力、容重和重量含水量三者的关系,分析了土壤持水特征测定中的容重变化特征;借用土壤水分特征曲线幂函数模型和土壤收缩特征线性模型获得容重与吸力间幂函数关系,并利用试验资料进行检验;提出了确定土壤持水特征测定中容重变化的三点法,该方法所获得土壤水分特征曲线与实测结果极为吻合,精度较高。
3.
The principle and process of dynamic testing the direct current resistance in transfor mer coil by "three points method" is introduced.
提出了“三点法”动态测量大型电力变压器绕组直流电阻的原理和方法，即利用电阻、电感在直流电源作用下的充电过渡过程，用计算机技术调节充电过程的时间常数，并对充电动态曲线进行等间隔采样，只要选择三点以上信息，通过计算机解出3个联立方程，即可求得变压器绕组的直流电阻值。
4) 3-point method
三点法
1.
In this paper, the fundamental theory and algorithm of independent component analysis (ICA) are introduced,and it is proposed to utilize the ICA method for the error separation in the 3-point method for measuring the roundness error of large shafts,in which the requirement for the measurement system in the structure precision and the precision of sensor positions is reduced.
文章介绍独立分量分析的基本理论和算法,提出在大轴圆度误差的三点法测量中应用独立分量分析进行误差分离,可降低对测量系统结构精度、测头布置及测头间夹角精度的要求。
2.
The results indicated that three methods all make good fitting precision,especially the 3-point method;according to the mathematical m.
考虑到模型适用范围和预测精度等问题,结合工程实例,比较了模型中参数K的三种估计方法,并用线性回归获得另外两个参数a、r,应用结果表明:三种方法拟合精度都较高,其中以三点法最优;在沉降发展的时间预测上,根据模型的数学意义,以拐点法最优,三点法和四点法预测效果不理想。
3.
The formula estimating parameter K of the model with 3-point method was deduced.
本文推导了用三点法估计该模型中参数K值的公式 ,并提出了估计K值的新方法一四点法和拐点法。
5) 3-point method of EST
三点法EST
补充资料：B点法
分子式：
CAS号：
性质：在BET理论出现之前从吸附等温线确定单层饱和吸附量的简易方法。由第Ⅱ类吸附等温线的起始段可知，随着气体相对压增加，吸附较快升高，随后出现向一平缓直线段转折，此转折点称B点，此点相应之吸附量可近似作为单层饱和吸附量，若辅以吸附分子截面积数据可求得固体比表面。此法称为B点法。该法现已不多用。
CAS号：
性质：在BET理论出现之前从吸附等温线确定单层饱和吸附量的简易方法。由第Ⅱ类吸附等温线的起始段可知，随着气体相对压增加，吸附较快升高，随后出现向一平缓直线段转折，此转折点称B点，此点相应之吸附量可近似作为单层饱和吸附量，若辅以吸附分子截面积数据可求得固体比表面。此法称为B点法。该法现已不多用。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条