stere ographic projection

The time series of jet penetration depth of horizontal jet in a two dimensional fluidized bed are acquired based upon digital image processing.

利用图像处理技术，得到了二维流化床内水平射流深度的时间序列。

Via the new concepts of sunny facets,shady facets and flat projective facets of a convex polytope to an outer point and two shield lemmas,it is proved that any n-polytope in Rn can be dissected into a finite union of n-simplices with the vertices coincide with the original polytope and no pair of small simplices has an interior point in common.

通过引进凸多胞形对其外部一点的阴面、阳面与平射面等概念,借助两个屏蔽引理证明Rn中任何n维凸多胞形都可以剖分为内部互不相交、以原凸多胞形的顶点集的子集为顶点集的有限个n维单纯形之并,克服了相关文献中剖分的不足,为单纯形算法提供了一种比较理想的剖分工具。

Aiming at the existing problems of brazing technique for horizontally projected jet bit,the influence of bonding temperature,pressure and time on the quality of the welding seam was investigated by means of vacuum diffusion bonding,and the optimum technological parameters for high-quality welding seam were determined.

针对水平射流钻头钎焊工艺存在的问题,采用真空扩散焊接工艺,研究了焊接温度、焊接压力和焊接时间等工艺参数对焊缝质量的影响,并确定了最佳焊接工艺参数;水压试验表明,用真空扩散焊接制造的水平射流钻头焊缝致密性好,在70 MPa压力下无泄漏。

In allusion to the problems of vacuum diffusion welded jet bits, a technique for manufacturing horizontally projected jet bits by means of vacuum diffusion welding was put forward.

针对水平射流钻头钎焊工艺存在的问题,提出用真空扩散焊接代替钎焊制造水平射流钻头的新工艺。