它们对直观上理解两二次曲面交线的拓扑形态有非常重要的意义。
It is very helpful to instinctively understand the morphology of the QSIC such a quadric pencil has.
曲面交线、曲面内凹区域及曲面中浅平面的加工是曲面加工的难点。
Surface intersections, concaves and shallow planes of the curved surface are difficult to machine.
曲面交线、曲面内凹区域及曲面中浅平面的加工是曲面加工中的难点。
The line of intersection, inward concave and shallow area of curved surface are the difficult points in curved surface machining.
提出了在曲壳有限元法中用坐标转换法处理曲面交线处结点位移的连续性问题。
The coordinate transformation method to handle displacement continuation problem on the intersection line of curved surfaces in the curved shell finite element method is presented.
给出了隧道工程的一类数值方法。讨论了求空间曲面与空间平面交线的一种数值方法及其应用。
This paper presents one kind of numerical method of tunnel engineering and discusses a numerical method for finding the intersection of curved surface and plane in space and its application.
本文利用特征多项式方程使得二次曲面交线的平面曲线分支的求解简化成平面与二次曲面求交问题。
The planar components and straight line components of the quadric surfaces intersections are studied precisely by means of matrix algebra in this paper.
两平面交线课件主要功能用于求解各种位置两平面交线的端点、绘制两平面交线的正等轴测投影和三面投影。
This courseware is used for finding the position of the endpoint of two intersecting triangles and drawing the surfaces, the isometric projection of the intersecting line and three-plane projection.
文章利用脐点的性质研究了二次曲面的圆截口问题，并给出了与二次曲面交线为圆的圆截口的方程的一种求法。
In this paper, we make use of the properties of the umbilic to research circle section question of quadric in 3-dimensional Euclidean space. We give the equations of these circle sections.
文章利用脐点的性质研究了二次曲面的圆截口问题，并给出了与二次曲面交线为圆的圆截口的方程的一种求法。
In this paper, we make use of the properties of the umbilic to research circle Section question of quadric in 3-dimensional Euclidean space.
本文针对曲面加工中的补加工技术进行了理论和工艺分析，对曲面交线、等高线补加工等刀具轨迹生成算法进行了探讨。
This paper theoretically and technically analyzes the makeup machining of curved surface, and discusses the generating algorithm for cutter track of makeup machining of contour.
提出并实现了在CNC系统中完成曲面交线加工刀具轨迹直接插补的构想，可极大提高CNC系统的几何轨迹控制能力和使用性能。
The new idea that completing the tool-path interpolation for sculptured surfaces intersection machining in CNC system is presented and realized in this paper.
它不仅对解决有关旋转抛物面交线的作图问题提供了很大的方便，同时还能解决一些用画法几何的一般作图法所不能解决的作图问题。
This new method not only is convenient to solve the graphy of intersecting curve of paraboloid of revolution, but also can solve some graphic problems which can not be …
让骑兵面对面交替排成两条平行线并使他们相对前进，好像要穿过彼此间的间距，首先采取防卫姿势，接着是冲锋姿势。
Arrange the troopers with intervals in two parallel lines and cause them to advance as if to pass through the intervals, first at guard and later at charge saber.
本文以在建南京地铁二号线一期工程新街口车站施工期地面交通疏解所采用的钢便桥为工程背景。
This paper presents the application of temporary steel bridge as the access of construction machineries and vehicles.
广州地铁二号线要穿越华南路，华南路是一条高速公路，施工时地面交通不能中断，本文建议采用顶管法穿越。
Guang zhau the Undergroumd 2nd Line will pass through Hua nan Express Way. During construction communication of the express way should not be cut off. Pipe jacking method is suggested.
广州地铁二号线要穿越华南路，华南路是一条高速公路，施工时地面交通不能中断，本文建议采用顶管法穿越。
Guang zhau the Undergroumd 2nd Line will pass through Hua nan Express Way. During construction communication of the express way should not be cut off. Pipe jacking method is suggested.
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