查询词典 principal

Thirdly, the principal curve and polygonal line algorithm are introduced, and an implementation of polygonal line algorithm based on Quasi-Newton numerical optimization is illustrated. The simulation results show that when this algorithm isused in the detection of curvilinear defects on wafer map, it can converge fast, compute accurately and meet the demand of application of defects pattern analysis, and with the number of line segment increasing, the polygonal line will approximate to the Kegl principal curve.

研究了主曲线、多边形线算法，提出用多边形算法识别弧状缺陷想法，讨论了用拟牛顿法实现该算法的解决方案，针对硅片缺点模式分析中常出现的弧状缺陷，采用该算法进行检测分析，实验结果表明这种算法快速准确，当线段个数或最小距离平方期望值达到一定门限值后，多边形线就已经能够描述弧状缺点集的形状，随着线段个数增加，最小距离平方期望值还在不断下降，最终会收敛到Kegl主曲线。

Two series of drained tests with fixed principal stress axes and cyclic rotation of principal stress axes were conducted with a hollow cylinder apparatus at Hong Kong University of Science and Technology.

采用香港科技大学的空心圆柱扭剪仪进行了应力主轴固定单调剪切和应力主轴循环旋转两种不同路径的排水试验。

A new cyclic constitutive model for sands which can describe the deformation behavior of sands under combined variation of principal stress axes and magnitudes was developed based on the above physical fundamentals. And its effectiveness under the complex stress paths including cyclic rotation of principal stress axes is verified by a good comparison of model simulation with test results for sands.

2基于对应力主轴循环旋转条件下砂土的基本变形规律的认识，吸收和借鉴已有弹塑性本构模型研究成果中的合理概念和建模方法，建立了一个可合理描述应力主轴循环旋转效应及主应力幅值大小与应力主轴方向循环耦变效应的砂土弹塑性本构模型，并对该模型在包含应力主轴旋转的复杂循环应力路径下的有效性进行了验证。

The first one analyzed composing and working principal about low speed control system of principal axis.

第一部分，对主轴低速控制系统的构成及工作原理进行分析。

In this paper, in view of the working condition of common principal axes and the exothermic situation, the uneven and steady temperature field of the principal axis system during the working process is described.

主轴是机床或仪器等精密机械的核心构件，它也是影响精度的主要因素，主轴系统的热变形对机械的工作精度影响也很大。

This is called the principal branch and the values for this branch are called principal values.

这个特定的函数被称为主函数，主函数的值被称为主值。

Where a mode of issuing the bank bills of another bank upon agency is adopted, the head offices of urban commercial banks, foreign-funded banks, urban credit cooperatives and rural credit cooperatives unions at the county level shall conclude the agency agreement with the local branch office of the principal bank and report to the head office of the principal bank or the branch office authorized by the head office for approval and effectiveness.

采取代理签发他行银行汇票方式的，城市商业银行总部、外资银行、城市信用合作社和农村信用合作社县联社与被代理行当地分支行签订代理协议，并报被代理行总行或其授权的分支行批准生效。

Then, based on the mean curvature, Gaussian curvature and the function of principal curvature, the minimal loci of the principal normal surfaces of curves, the curves with constant Gaussian curvature and the two curves of which the ratio of their functions is constant can all be obtained, as well as the properties of geodesic curve and lumbar curve.

再根据平均曲率、高斯曲率及主曲率函数，能得到曲线的主法线曲面的极小轨迹、常高斯曲率曲线及两个主曲率函数之比为常数的曲线。还给出曲面上测地线和腰曲线的性质。

Aiming at the problem of coarse footmark surface with severe noises, based on the in-depth analyzing geometrical relationship and differential characteristics of the three-dimensional footmark impressing surface, we propose a principal curvature and principal direction based impressing surface segmentation algorithm and a multi-scale fusion algorithm to segment the stereo footmark.

针对立体赤足迹表面粗糙、噪声严重的特点，深入分析立体足迹三维表面的几何关系和微分特性，提出了基于曲面主曲率和主方向的立体足迹压力面分割算法和多尺度融合算法，分割结果理想并与领域知识吻合。4。

Keywords: image analysis, principal curves, principal curve component, neural network

仿真实验结果表明，主曲线成分分析能很好地解决非线性主成分问题，应用前景广阔。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。