平面曲线

Points in the physical plane are mapped onto corresponding points in the hodograph plane.

物理平面上的点被映射到速端曲线平面上的对应点。

First, in the horizontal positioning accuracy aspect of total-station instrument, point out the importance of direction, distance to correct calculation and coordinates to convert, give coordinates calculated formula of single intersection point of non-symmetry type of horizontal curve, deduce to square–error's calculated formula of horizontal coordinates and point space by polar coordinates positioning methods, and analyze the main influence factor of square–error.

首先，在全站仪的平面定位精度方面，指出方向、距离归化计算和坐标转换的重要性，给出单交点非对称型平曲线坐标的计算公式，导出极坐标定位法平面坐标和点位中误差的计算公式，并分析中误差的主要影响因素。

Analyses of loci in the π plane and meridian line s show that the parabolic and hyperbolic type failure envelopes have no influences on the shape of the.

对改进式所作的π平面极限线和子午线分析表明，采用抛物线和双曲线形强度包络线基本上不会改变原准则在π平面上的极限线形状，但子午线由直线改为曲线，极限面在主应力空间内分别为抛物面和双曲面，其锥顶距坐标原点也比采用线性强度包络线的要小。

Combined the classification results with development performance and injection production relationship in oil field, distribution s for residual oil in the reservoir plane and interlamination are studied and the distribution are also summarized.

通过列举弱水淹层段测井曲线的特征及划分方法，将弱水淹层段划分结果与油藏开发动态及注采关系相结合，研究油藏平面及层间层内剩余油分布，从而总结出油藏平面及层间层内剩余油分布规律。

Combined the classification results with development performance and injection production relationship in oil field,distributions for residual oil in the reservoir plane and interlamination are studied and the distribution are also summarized.

通过列举弱水淹层段测井曲线的特征及划分方法，将弱水淹层段划分结果与油藏开发动态及注采关系相结合，研究油藏平面及层间层内剩余油分布，从而总结出油藏平面及层间层内剩余油分布规律。

Principal Plane Choose a plane to flatten the curve onto.

代理平面：选择一个轴平面平坦曲线。

It is found surprisingly,that the direction of the largest deff of the crystal is not in the principal plane as usual but along (θ=65.9°,=36.5°) and (θ=66.3°,=143.9°) and further,its value is direction dependent in the different phase regions.

计算出的曲线显示，YCOB晶体的最佳有效倍频系数的位置不是在x-z的主平面或接近于x-z主平面的位置上，而是在(θ=65.9°，=36.5°)和(θ=66.3°，=143.9°)两个位置上。

On the assumption that a triplet of points is matched to another one as a whole beforehand, we give an effective algorithm based on P〓-invariants. On the assumption that there exists an arbitrary closed curve in the scene plane, using a technique named projectively invariant decomposition of planar shapes, we realize another efficient algorithm.

在假设已知一对三点组整体对应的前提下，基于对排序和投影同时保持不变的P〓-不变量，给出了一种有效算法；在假设场景点集所在平面内存在一条封闭曲线的前提下，利用平面形状射影不变分解技术，提出了另一种有效算法。

Based on the principle of surface development in differential geometry, the method of development for cone and tangent surface is given. Cone is developed in the unit ball way.

锥面的展开是利用单位球方法，确定直母线与平面上过定点射线之间的映射关系，进而展开曲面；切线曲面的展开则利用准线曲率在展开中的不变性，确定准线在平面上的展开曲线，再作与之相切的直母线，从而实现曲面的展开。

The design tool not only could provide various core specifications and its loss characteristic curves base on the core database, but also suit for PCB windings design of non-storage-energy type planar transformer with arbitrary number of winding and layer, and arbitrary connections. It is a good design tool for planar transformer with enough engineering precision, high performance and low cost.

软件不仅可以提供基于数据库的各种磁芯规格参数和各种损耗特性曲线，而且适用于分析、设计非储能式平面变压器的任意个线圈的任意连接结构和任意层数的PCB线圈，有足够高的工程精度，为设计高性能平面变压器提供了高性价比的设计工具。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了