四边形

In the 60% of the active area of 1×1 cm2 PSD, the position root mean square error was less than 3 μm , the position non-linearity was less than 0.05%. This modified equation can be fit for all tetra-lateral PSDs.

对于1×1 cm2的PSD，在60%光敏面的区域内均方根误差小于3 μm，非线性度小于0.05%，该公式适用于所有的四边形PSD，对于PSD的实际应用具有重要意义。

Record each move and record the instruction eg rotate 90 to the right.

每次移动记录指令，如：向右旋转90度）上课时，教师稍作解释，然后每个学生分发到一块积木和一张8开白纸，积木有三角形、有正方形、有长方形、有平行四边形，学生就按照白板上的要求认认真真制作了一节课。

With the exception of this issue which was left free, and which constituted what Folard in his strategical style would have termed a branch and taking into account, also, the narrow cutting arranged on the Rue de la Chanvrerie, the interior of the barricade, where the wine-shop formed a salient angle, presented an irregular square, closed on all sides.

这条未经阻塞留作通道的出路，也许就是福拉尔①兵法中所说的那种交通小道；如果这条小道和麻厂街的那条狭窄的缺口都不计算在内，这座街垒内部除了酒店所构成的突角以外，便象一个全部封闭了的不规则四边形。

A rubber strip (10) may be scalene triangular shape, a trapezoidal shape or a parallelogram shape having has a bottom line (11) forming a strip width, a first diagonal line (12) extending from one end of the bottom line (11) and a second diagonal line (13) extending from the other end (P2) of the bottom line (11), a length (L0) of the bottom line is set to 5 to 50 mm, and a thickness thereof is set to 0.2 to 5.0 mm.

橡胶条(10)的形状可以是不等边三角形、梯形或者平行四边形，上述形状具有形成条宽的底边(11)，延伸自底边(11)一端的第一斜边(12)和延伸自底边(11)另一端(P2)的第二斜边(13)，底边的长度(L0)设定为5-50mm，其厚度设定为0.2-5.0mm。

In this paper,three problems are researched.First,a method for recognizing triangle and quadrangle is introduced based on geometry and angle constraint.Then Attribute Relation Graph is employed to describe simple polyhedron and line drawing.

依据投影几何中的距离约束和角度约束，给出了三边形和平行四边形的识别方法；提出用属性关系图表示平面立体和线图，该描述方法是一种结合表面特征和几何特征的方法。

In chapter 4,on the basis of chapter 3,a new formulation of hybrid/mixedsingular plate element based on Reissner's plate theory is set up,and 4-node arbitraryquadrilateral hybrid/mixed singular bending plate element formulas including theeffects of transverse shear deformation is derived,then by the use of this method,alarge quantity of numerical computations are carried out,at the same time,the resultsare compared with theoretical solutions and the results obtained by other singularfinite element methods.

第四章 在第三章的基础之上，建立基于Reissner型板理论之上的杂交/混合奇异板单元列式，推导出了考虑剪切效应的四节点任意四边形杂交/混合奇异弯曲板单元公式，并进行了大量的数值计算，同时与理论解析解和其它有限元解进行了比较，计算结果表明：本文提出的杂交/混合奇异板单元方法是可以用于计算含裂纹平板弯曲应力强度因子的一种高效、可靠、简便易行的方法。

The first SunTour Skitter was an inexpensive stamped steel parallelogram rear derailleur made in the early 1960s.

第一山图Skitter是一种廉价的冲压钢平行四边形后拨60年代初提出。

Besides, the solution of large equation set can be avoided and the computation efficiency can be increased using the algorithm for the planar parameterization of quadrilateral meshes, so it provides the basis for the reconstruction of parameterization surfaces for quadrilateral meshes.

此外，该方法避免求解大型方程组，提高了计算效率，可为构造重建四边形网格的参数曲面提供有效方法。

In order to calculate the electric field intensities of spherical electrode s in 3-D electrostatic fields precisely, the spherical surface curve quadrangular BEM based on spherical systems is put forward.

为了精确计算三维静电场中球形电极表面的电场强度，基于球坐标变换提出了球面曲边四边形边界元方法。

A kind of finite element analyzing software "ANSYS" is used to calculate the temperature field of cable system; Finally, Subtense truncation approach is used to calculate the ampacity of cable system with equal load.

根据地下直埋电缆的温度场特性，将开域场转化为四个边分别符合第一、二和三类边界条件的四边形有界热场问题，然后利用有限元法计算场域内的温度场分布，最后用迭代的方法确定电力电缆的载流量。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。