坐标平面

In this research, the plane 2D mathematical model under Cartesian coordinate system and the

首先建立了直角坐标系正交网格下的平面二维数学模型及复杂边界适体坐标条件下的三维紊流数学模型，对方程的离散差分格式、控制方程的求解、初始边界条件、动边界处理等问题进行了分析研究，并编制相应的计算程序。

Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.

象限在笛卡尔坐标系中，被坐标轴分开的平面中的四个区域的任一个，命名为第一，第二，第三和第四，从此象限逆时针计算坐标为正数

Three coordinates of a known plane and return to them determined by the center and radius of a circle.

详细说明：已知平面上三点坐标，返回由它们确定的圆的圆心和半径。

Chromaticity diagram: Plane diagram in which one of the three chromaticity co-ordinates is plotted against another.

色度图：平面图表。显示三个色度坐标之一与另一个的情况。

Chromaticity diagram: Plane diagram in which one of the three chromaticity co-ordinates is plot ted against another.

色度图：平面图表。显示三个色度坐标之一与另一个的情况。

The new method of solving the hydraulic fracture moveable boundary problem by use of the method of the conformal transformation and body-fitted coordinate is put forward; according to the law of continuation, the transformation from the control equation in the physical plane to the calculation plane is completed, and two dimensional fluid field numerical simulation in the fracture is also finished.

提出了利用保角变换和贴体坐标变换处理水力裂缝动态边界问题的新方法，根据链导法则完成了物理域控制方程向计算域平面的转换，实现了二维流场的数值模拟； 5。

In view of the tedious and mistakable manual calculation in measuring Gauss projection,coordinate zone transformation and meridian convergence,an itera-tive approximation method is adopted and programmed by BASIC to imple-ment the direct and converse calculation of Gauss projection and computer cal-culation of meridian convergence angle.

针对测量工作中人工进行高斯投影、坐标换带和平面子午线收敛角计算非常麻烦又容易出错的问题，采用迭代法趋近求值，用BASIC语言编制了相应的计算机程序，实现了上述计算。

In this paper, an arbitrary edge in the plane of the convex polygon generating algorithm, discussed the randomly generated convex polygon vertex algorithm idea.

本文研究在平面中生成任意边的凸多边形的算法，讨论了随机生成凸多边形顶点坐标的算法思想。

Star pattern identification algorithm based on convex polygon with star magnitudes-independent is presented for strap-down celestial guidance.

依其坐标排序，采用由平面上的点生成凸多边形的算法，就能得到唯一的、以恒星为顶点的凸多边形。

The transformation of plane coordinate system is a kind of 2D transformation.

平面坐标系统之间的相互转换实际上是一种二维转换。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。