曲线坐标

Based on the tooth profile plane model's boundary scope and the geometry dimension of the transmission gear, the paper calculates every point's Cartesian coordinate in all parts of tooth profile, such as addendum arc, involute, dedendum easement curve, axle hole arc and other boundary line section.

最后根据齿廓的几何尺寸和五类齿廓平面模型的边界范围，计算齿廓各部分，即齿顶圆圆弧段、渐开线段、齿根过渡曲线段、轴孔圆圆弧段和齿廓平面模型上其他边界线段上点的坐标，并连接这些点生成各部分线段，从而生成齿廓平面模型。

In chapter 4, by AREELS, the Generalized Oscillator Strength Density Spectra were measured in the energy region from 56 to 66eV, with the incident energy 2. 5 keV and energy resolution 80 meV, at scattering angles from 0°to 6°, corresponding to the momentum transfer K〓=0.03~2. 01 a. u. The Fano profile parameters f〓 and q for the optically allowed transition 〓(0, 1)〓P°and the optically forbidden transitions 〓(1, 0)〓S〓and 〓(1, 0)〓D〓 were obtained as a function of K〓. With the hyperspherical coordinate wavefunctions, the dynamical correlation are discussed qualitatively. So, a new experimental way to study dynamical electron correlation effect is opened.In chapter 5, the widely used R-matrix theory was introduced. Then, the GOSDS for the optically allowed excitation series (1s〓)〓S〓→〓(0, 1)〓P°(n=2-4) were calculated by this method, and the Fano profile parameters f〓 and q were obtained sequently. So the electron correlation effect can be described by these parameters quantitatively, and the theoretical results were compared with our AREELS experimental results.

在第四章中，实验上，同样使用角分辨的高能量分辨快电子能量损失谱仪，在2.5keV电子入射能量和80meV的能量分辨下，测量了0°到6°散射角下的He原子双电子激发态在56~66eV的广义振子强度密度谱，这种情况，0°~6°对应的动量转移范围K〓=0.03~2.01a.u。，得到了光学允许跃迁的双电子激发态〓（0，1）〓P〓和光学禁戒跃迁的双电子激发态〓（1，0）〓S〓、〓（1，0）〓D〓的Fano线形参数f〓，q等随动量转移变化的曲线；观测到了几个强度很弱、能级很窄的光学允许和禁戒跃迁双电子激发态，用前人准确的理论结果进行了标识；通过比较弱共振〓（1，0）〓S〓和〓（-1，0）〓S〓的强度随动量转移K〓的变化规律，结合超球坐标理论计算的波函数，定性地阐述了在电子碰撞散射过程中它们各自不同的动力学电子关联效应，发展了一套在实验上研究电子关联效应的新方法。

Carrying out a fitting to curves between rising height of capillary water and time with various functions,it found that fitting effect was best with secondary polynome regression equations under the log coordinate.

对毛细水上升高度与时间关系试验曲线用各种函数进行了拟合，发现毛细水上升高度与时间过程在对数坐标下用二次多项式回归方程进行拟合效果最好。

With the feature points detected from the linked list, the geometrical model of leaf shape is upbuilt by the rational cubic spline interpolation.

以坐标链表检测到的轮廓特征点进行三次样条曲线插值，建立植物叶片的几何模型。

This paper applies the concept of "contact" in Differential Geometry into the machining of sculptured surfaces, presentes the contact principle of the machining of complicated surfaces, using the circumference circle of the cylindrical cutter to sweep curved surfaces instead of ball-end mill .

把微分几何中曲线与曲面之间的&切触&概念应用于复杂曲面的数控加工，提出用圆柱铣刀和圆锥盘铣刀的外圆在五坐标联动中加工三维自由曲面的最佳切触条件。

Because the curve radius of easement curve gradually changes, the formula for calculating the coordinates can not be obtained with the method of integration.

由于缓和曲线的曲率半径是逐渐变化的，不能用积分的方法求得其上点位坐标的计算公式，以往都是用级数展开进行近似计算。

The exact value of point coordinates on the easement curve can easily be obtained through using the definite integral function of Casio calculator.

利用编程计算器的定积分功能，就可以方便地计算出缓和曲线上点位坐标的精确数值。

It is demonstrated that the air temperature, ground temperature and their annual ranges in the Tibetan Plateau are highly correlated with corresponding latitude, longitude and elevation.

应用曲线拟合方法将所得统计分析系数拟合成时间函数，就可将高原地区的气温和地面温度表示成统一的空间坐标和时间的函数。

Combined with the disturbed state concept proposed by Desai, the consolidation line of the structured soils could be divided into two linear parts in loglog plot.

按照Desai的挠动状态理论，双对数坐标下结构性土的压缩曲线可以简化为两段直线。

The thesis introduces an equal difference between an approximate value and an accurate value waY for panel point's coordinate calculation of the irregular curve by means of tangent line's approaching;illustrates it with a concrete example;and falls back on MATLAB mathematic software to draw an imitation picture of cutting tools' locus.

介绍一种用切线逼近非圆曲线节点坐标计算的等误差法，结合实例，借助M ATLAB数学软件，绘制出刀具轨迹的仿真图。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。