共线

得到主要结果：令q是素数方幂，若G是一个射影平面的共线变换群并且传递地作用在点集合上，则G不能与PSU（3，q2）同构。

The main result : Let q be a power of a prime , and if G is a collineation group of a projective plane and G acts transitively on the points , then G is not isomorphic to PSU ( 3 , q ~ 2 ) .

借助射影坐标系用解析方法证明了巴卜斯命题，并由巴卜斯命题按照射影对应的透视特征导出了六点共线问题，最后把这个结果作了进一步的推广。

This paper proves that Pappus proposition by means of analytical solution at real projective coordinate system and the issue about six point collineation are derived according to perspective feature of projective correspondence . Finally , the result of this thesis can be further generalized .

关于内接n点形对边交点的共线问题

On collinear problems of intersection points of opposite sides for an inscribed n-gon

研究N体问题共线解的数值方法。

The numerical methods of solving the collinear N-body problem are studied in detail .

设P为平面中n个点的集合，其中无三点共线。

Let P be a set of n points in the plane , no three collinear .

本文讨论平面上无三点共线的有限点集。设P为一个无三点共线的有限平面点集。

In this paper we consider only finite planar point sets in which no three points are collinear .

AgGaS2晶体Ⅱ类非共线相位匹配CO2激光参量上转换

A noncollinear type ⅱ phase-matching parametric upconversion of CO_2 laser in AgGaS_2 crystal

E型反铁磁为共线磁序，铁电性机制与交换伸缩有关。

E-type antiferromagnetic order is collinear , and leads to the ferroelectricity in-volving with exchange striction .

用共线快离子束-激光光谱学研究NdⅡ能级的超精细结构

Hyperfine Structure of Nd ⅱ Using Collinear Fast-Ion-Beam-Laser Spectroscopy

为提高回波信号的信噪比，在SAW器件的设计中，采用了一种并联式的新型结构以替代传统的共线式结构。

Instead of conventional layout , a new parallel layout is adopted to gain high Signal-to-Noise ratio in designing the SAW device .

共线型CS2微微秒光学快门

A collinear CS_2 picosecond optical gating

采用Green函数的方法，研究界面多个共线裂纹对SH波的散射问题。

The scattering of SH - wave by interface multiple co - linear cracks is studied with Green 's function .

两个共线Kerr黑洞度规迭加的时空结构

Space-time structure of the superposition of two co-linear Kerr black holes ' metrics

氢原子共线交换反应的动力学计算Ⅰ.Cl与HCl反应几率的振荡现象研究

Quantum Calculations on the Collinear Reaction Cl + HCl ⅰ . Study on Oscillations of the Reaction Probabilities

非共线泵浦的KTP光参量振荡器

KTP Optical Parametric Oscillator with Noncollinear Pump

功能梯度条共线Griffith裂纹反平面剪切冲击

Antiplane shear impact of coplanar Griffith cracks in a functionally graded strip

主要研究了非共线信号对共线信号和ABS噪声的影响。

Here I mainly research the non-collinear influence the collinear signal and the ABS noise , obtaining the conditions for optimizing the amplifier performances .

设计了利用量子阱共线差频产生THz波的实验装置。

At last , the experimental setup of difference-frequency generation of THz-wave in asymmetric quantum well was designed .

对非共线泵浦KTP光学参量振荡器的相位匹配过程进行了理论分析和实验研究。

KTP Optical Parametric Oscillator with Noncollinear Pump The phasematching condition in noncollinear pump OPO is analyzed .

运用数字地形数据和共线方程，对扫描数字化的单张调绘航片进行数字纠正，从而更新GIS空间数据库的方法，是一种可供选择且很有吸引力的空间源数据获取方法。

Updating the spatial database of a GIS by rectifying a single digital identified photograph according to the DEM and collinearity equation is a kind of attractive method acquiring original spatial data .

非共线AOTF±1级衍射光波长的研究

Study on ± 1 Orders Diffraction Beams ' Wavelength of Non-Collinear AOTF

NaCl共线光热光偏转光谱频率特性的研究利用液体中的光热偏折测量激光的光强分布

Investigation of frequency properties of collinear photothermal deflection spectrum of NaCl Measure the Distribution of Intensity of Laser Light by Photothermal Deflection in Liquid

在新参量S、H正方形核素图中，稳定区奇A核素的上界表现出优美的三点共线对称组。

In the square chart of nucleus with new parameters S and H , upper limits of nucleus with odd A for stable region are shown graceful regularities of three points collinear symmetry .

利用2维DLT和共线方程分解相机外方位元素

Decomposing Camera 's Exterior Orientation Elements Using 2D DLT and Collinearity Equation

超球坐标下共线三原子反应散射的一阶Magnus数值传播法计算

Reactive scattering calculations of collinear triatomic systems in hyperspherical coordinates by first-order Magnus numerical propagation method

复共线Gauss-Markov模型参数估计的最小描述长度方法

Parameters Estimation of Multi-Collinearity Gauss-Markov Model Based on Minimum Description Length

详细计算了在Nd：YAG调Q激光器各次谐波泵浦条件下的共线Ⅰ类和Ⅱ类相位匹配的调谐曲线，以及非共线Ⅰ类相位匹配调谐曲线；

Collinear type-I and type-II phase matching tuning curve pumped by the Q switch Nd : YAG various harmonics as well as noncollinear type-I tuning curve are calculated in details ;

有限板共线多孔MSD应力强度因子有限元分析

Finite Element Analysis on SIF of a Number of Collinear Holes on MSD Finite Plate

无约束最优化的共线调比算法Broyden族

Broyden family of collinear scaling algorithm for unconstrained optimization

依照动力学和运动学原理，建立N体问题共线解所满足的条件方程，把解微分方程组的问题转化为解非线性方程组的问题。

By the Newton 's dynamic principle and the constraint equations that the collinear N-body systems satisfy , the problem of solving the set of differential equations is transformed into that of solving the nonlinear set of equations .