查询词典 quadrilateral

But parametric surface requires that the boundary of data is quadrilateral in topology.

实例证明此方法可以正确、有效地进行反向工程中多视图的数据分区。

As we all know,there is one Simson line at any point on the circumference of triangles,but in this paper, LHP theorem shows that the above conclusion is not correct for any quadrilateral pyramid in three-dimensional space and also during proving LHP theorem,fixed value theorem is proved,at the same time,one guess about the point H and point P on circumscribed sphere of tetrahedron has been concluded.

众所周知，三角形的外接圆周上任一点存在一条 simson 线，而 LHP 定理则指出对于正四面体该结论是不能推广到三维空间上的，并且在论证 LHP 定理的过程中得出了定值定理，同时作为一般四面体的外接球球面上的 H 点、P 点的分布，给出了一个猜想。

Based on the variational principle of virtual voltage and virtual displacement derived in this thesis and the classical theory of linear laminated plates, and by using the constitutive equations of elastic piezoelectric materials, and the DKQ quadrilateral plate bending element, the finite element modeling for the fabric reinforced laminated plates with nonlinear voltage-electric strain relationship of piezoelectric actuators has been established for the first time in this thesis. And the expressions for the electric loadings with obvious mechanical meaning and convenient for computation are established, which can be used to the deformation analysis of laminated plates with piezoelectric actuators under specified voltages.

以本文直接导出的压电结构的虚电势—虚位移变分原理为基础，依据经典线性层合板理论和压电弹性体的本构方程，采用基于离散法线假设的DKQ四结点任意四边形薄板弯曲单元，首次建立了考虑非线性电压—电应变关系的含压电致动器的纤维增强型层合板的有限元分析模型，并推导建立了力学意义明确、便于计算的电荷载表达式，可用于指定电压条件下纤维增强型叠层合成板的变形分析。

In this article, the author compares and analyzes three kind of main calculation formulas of the square grid quadrilateral prismoid field leveling earth volume , and provides a formula to calculate directly total excavation and filling earth volume according to construction altitudes of angular points of square grids.

对场地平整土方量方格网四方棱柱体法的3类主要计算公式进行了对比分析，提出了根据方格角点施工高度直接计算场地总挖、填土方量的计算公式。

Find the area of the quadrilateral in the figure.

求图中的四边形的面积。

Determine a particular image is not in the development of the region, the region is an irregular quadrilateral.

详细说明：判断图像中的某一个点是不是在制定的区域内，该区域是不规则的四边形。

This paper describes two modified methods for triangular and quadrilateral meshing for finite element analysis of 2D electric machines.

该文描述了电机有限元分析中的 2种修正的三角形和四边形网格的生成方法。

In US a quadrilateral with two parallel sides.

有两个平行边的四边形。

If the lengths of the sides of a cyclic quadrilateral are 9, 10, 10 and 21 respectively, find the area of the

一圆内接四边形的四边长为9，10，10和21，求该圆内接四边形的面积。

To reduce the face number of reconstruction meshes, a new method for quadrilateral mesh reconstruction is proposed.

2提出了基于多分辨率的四边形网格重建算法，为解决重建网格面片数量过多的问题提供了新方法。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新