轨道曲线

Our difficulties are overcome in this paper by using the method of generalized normal sectors, provided by [Nonlinearity 17(2004): 1407-1426], which allows curves and orbits to be part of its boundary, may not be an angular neighborhood of the characteristic direction.

通过利用文献[Nonlinearity 17(2004)，1407-1426]中提出的广义正常区域方法，我们的困难得以克服，其中允许曲线或者系统轨道为广义正常区域的边界，而且该区域也不一定是要研究的特殊方向的角形邻域。

And from the development of automatic block both at home and abroad, the frequency type automatic block and cab signal seem to be the best.

从满足轨道电路的四条基本要求出发，作者提出使用不同信号周率时的比较标准和计算公式，列出计算结果和曲线，说明频率式自动闭塞和机车信号采用亚音频的周率范围最为合宜。

The dynamic curving behavior of the high-speed train with track irregularity is studied and the corresponding conclusion is drawn.

本文还对存在轨道激扰条件下的列车曲线通过性能进行了研究并得出了相应的结论。

The ground state of C2 molecule is studied using VB mehods. The potential energy curves of the C2 diatomic molecule were computed by using ab initio VB methods, VBSCF, BOVB, and VBCI. The computational results show that the VB-based PECs are parallel to that of Full CI calculation.

应用XMVB程序对C2分子的基态进行了理论研究，计算结果表明价键方法能够给出和FCI相平行的解离势能曲线；高级别的VB方法，VBCISD方法，能够得到和高等级分子轨道方法相符的解离能。

A curve that cuts all of a given family of curves or surfaces at the same angle .

常角轨道，轨线以同样的角度切割给定系统所有曲线或平面的曲线

The theories of multi member function"s extremity value, Hooke Jeeves mode searching method solving wholly complex problem of extremity value and uniformity design method, one new and efficient method to choose test point, are applied to establish the two-dimension oil well orbit optimized model. The shortest length of oil well orbit curve is regarded as this model"s object and all kinds of effecting parameters are analyzed.

通过引入多元函数极值理论、求解复杂极值问题的HookeJeeves模式搜索法及一种较为新颖和高效的试验点选择方法：均匀设计法，建立以最短油井轨迹曲线长为目标的二维油井轨道优化设计模型，并对影响井轨迹曲线的参数进行了较为详细的分析。

The design of the 3-dimensional trajectory in horizontal wells is an optimal control system where the state variables are azimuth, inclination and the control variables are radius, tool-face angle and length of curve.

水平井三维轨道设计是以方位角、井斜角为状态变量，以曲线半径、装置角、曲线段长为控制变量，以入靶精度等为性能指标的非线性多阶段最优控制系统。

Use refit and match curve if necessary to create a smooth curve as rail.

使用改装和匹配曲线如果有必要建立一个平滑曲线轨道。

On the one hand, the component method is introduced into flowchart design, which can not only enlarge the depth and the connotation of the flowchart, but also extend the traditional concepts of the flowchart. By combining the component method and the objectoriented method, it will be easy to illustrate the industry flow and meet with the future requirements of the industry control software. On the other hand, the trajectory concepts in plane moving, the method of using Bezier Curve to approach the 1/4 arc to implement the arc circumrotation, the method of using graphic elements' combination to extend the expression capability, and the method of combining the graphic elements'combination, three-dimensional graphic elements and bitmaps to realize the three-dimensional effects to express the industry flow more realistic are brought forward in this dissertation.

工控软件中最能够体现人机接口设计创造性的画面当属流程图，本文对流程图设计进行了深入研究，提出了一种工控软件流程图设计的新方法：一方面在流程图设计中引入部件化方法，扩展流程图的深度与内涵，延伸了流程图的传统概念与意义，将部件化技术与面向对象技术相结合，能够更好地实现对工艺过程的描述并适应工控软件的未来发展要求；另一方面对流程图中动画关联和三维化这些新兴领域进行了研究，提出了平移动画中的&轨道&概念，以实现图元的沿曲线平移，提出了在圆弧旋转动画中用Bezier曲线逼近〓圆弧的工程化方法，并用最小二乘法进行了验证和工程化参数的获取，实现了利用图元组合来扩展流程图的表达能力，采用了图元组合、三维图元和位图相结合的方法来实现逼真的三维效果，以使工控软件更加符合人机工学，更能形象地反映工艺流程。

The modeling methods about vestibule diaphragm, coupler and draft gear are introduced, too. Among the six Models, Model A and Model B can be used to study the vehicle stability and curve negotiation under different track situations. Model C and Model D can be used to carry out the stability, dynamic curving behavior and ride comfort of the high-speed passenger car. Model E and Model F are three-dimension train dynamic models which consist of three cars (head car, intermediate car and tail car).

所建立的6种动力学模型中，模型A和模型B可用于研究不同轨道条件下车辆的运动稳定性及动态曲线通过性能；模型C和模型D可以用来研究车辆的运动稳定性、动态曲线通过性能及运行平稳性；模型E和模型F是列车系统动力学分析模型，都是由三节车组成的列车单元，三车列车模型作为一个最小的列车单元，包含了头车、中间车和尾车，已能够反映整个列车的动力学特性。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷