查询词典 sectional

If the infimum of sectional curvature R_c in M~n satisfies: then M~n must be totally geodesic in M~,T_c is the supremum of Ricci curvature and t_c is the infimum of Ricci curvature in M~

如果M~n的截面曲率下确界R_c满足：则M~n一定是全测地的其中T_c，t_c分别是M~(n+p上Ricci曲率上确界和下确界。

Theorem 2 Let M~n be a compact totally real minimal submanifold in M~n which is a locally symmetric Bochner-Kaehler manifold.If the infimum of sectional curvature R_c in M~n satisfies: then M~n must be totally geodesic in M~n.

定理2 M~n是局部对称Bochner-Kaehler流形M~n中紧致全实极小子流形，如果M~n截面曲率下确界R_c满足：则M~n必是全测地的。

The relationship between the G(superscript *) integral of release rate of non-spontaneous extending energy and stress-intensity factors was given. The relationships among G(superscript *) integral, load, geometry parameters and machine function parameters were provided. Furthermore, the stress intensity factor of center cracks in sectional I beam was obtained.

给出了工字型截面梁裂纹非自发扩展能量释放率G积分与应力强度因子的关系，同时也给出了G积分与载荷、几何参量以及机械性能参数的关系，进而得到工字型截面梁腹板中心裂纹的应力强度因子。

The foundation pillar cross-sectional area is big, the height is high, the relative offset is big between top and bottom to the interior angle, and it is in wet sinking loess regions for 750 kV power circuit demonstrative project from Guanting to the east of Lanzhou.

750kV 官亭至兰州东输送电线路示范工程基础立柱断面大、高度大、顶面相对于底面向内角偏移量大，并且地处湿陷性黄土地区，施工控制难度较大，通过QC活动对基础施工进行改进。

According to the requirements of precision conformal dose delivery in radiation therapy, the focused trapezoid cross-sectional shape of the flank leaf of multi-leaf collimator is introduced, and the tongue-groove structure, which is used to minimize interleaf transmission, is determined.

根据放射治疗中剂量精确适形的要求，确定了多叶组合光栅叶片侧面的梯形聚焦形式和榫槽配合防漏射结构。

According to variable flow rate testing analysis theory, in view of the pressure characteristics only appeared in intermittent production period in exploration wells, it gives the sectional calculation idea of steady flow, pseudo-steady flow and DST and provides the calculation methods of steady time and pseudo-steady time etc.. It realizes more accurate simulation of downhole pressure history and improves the accuracy of pressure history matching.

利用变流量试井分析理论，针对开发井间歇生产期才有的压力特征，提出了稳定流动、拟稳定流动及DST流动的分段计算思想，并给出稳定时间、拟稳态时间等计算方法，实现了井底压力历史的更为准确地模拟，提高了压力历史拟合精度。

The sectional chorogram, which plotted automatically based on calculated data, reflects the space distribution charateristics of additional stress. The vertical or horizontal isogram at any given point can be drawn to show the law on the change of additional stress.

根据计算数据自动绘制的剖面等值线图，形象地反映了附加应力分布特征；可在任意位置绘出垂向和水平曲线图，细致地表示了附加应力变化规律。

The Web-based system is tailored for several topics of engineering drawing such as Orthographic Projection,Sectional View,Isometric and Oblique drawing at the secondary level.

该系统适用于几种工程制图，例如展开图、刻面图、等角图和斜角图。

The Webbased system is tailored for several topics of engineering drawing such as Orthographic Projection,Sectional View,Isometric and Oblique drawing at the secondary level.

该系统适用于几种工程制图，例如展开图、刻面图、等角图和斜角图。

Compared to cross-sectional imaging, it has a lot of advantages, such as the rate of obtaining projections, X-ray utilization ratio and the isotropy of the spatial resolution and density resolution in 3D object.

它在获取投影数据的速度、X射线的利用率及重建出的三维物体的空间和密度分辨率各向同性等方面，比断层成象有着极大的优越性。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。