球缺

目的探讨近端等速表面积法（PISA）和近端球缺表面积法（PSSA）测量二尖瓣狭窄（MS）瓣口面积（MVA）的准确性。

Objective To evaluate the accuracy of proximal isovelocity surface area method ( PISA )、 proximal segment surface area method ( PSSA )、 two dimensional echocardiography ( 2DE )、 pressure half time method ( PHT ) in measuring the mitral valve area ( MVA ) in mitral stenosis .

该文采用正交优化设计方法，利用数值模拟手段，对球缺型EFP战斗部优化设计进行研究。

Using orthogonal optimizing design and numerical simulation methods , EFP warhead with hemispherical liner is optimized .

在此基础上以球缺型爆炸成型弹丸为计算模型，应用显式有限元程序LS-DYNA对满足模拟比的爆炸成型弹丸侵彻钢靶的过程进行了数值模拟。

With hemispherical EFP simulation model , the penetration process of EFP that satisfies the simulation ratio are calculated using explicit finite element program LS-DYNA in this paper .

得到非接触原子力显微镜在金红石TiO2（001）面五面体、球缺和组合形状量子点表面沿[110]方向扫描的原子级分辨率频率位移图像。

Atomic resolution is achieved by frequency shift image for rutile TiO_2 ( 001 ) surface of pentahedron quantum dot in vertical route , spherical cap quantum dot in superposition s1 route and combination quantum dot in combination route scanning along [ 110 ] direction .

热风炉球缺式炉箅子的生产柳钢1~高炉球式热风炉设计特点

Design Characteristics of Ball Type Hot Blast Stove for No.1 Blast Furnace of Liu-Steel

球缺型独立灰室，可增加炉内氧化还原空间。

A ball-lacking type independent ash chamber can increase oxidation-reduction space in the furnace .

文中介绍了改造过程中用转炉球缺封头替代碟形封头的原因及可行性，介绍了炉体安装的焊接工艺规范及过程。

This paper describes reasons and feasibility of using segmental casing cap instead of dashed casing cap in the converter as well as welding criteria and procedure for furnace erection .

曲率半径对双层球缺罩形成串联爆炸成型弹丸的影响爆炸成形弹药型罩材料的现状和趋势

Effects of Liner Curvature Radius on Formation of Double-Layered Spherical Segment Charge Liner into Tandem Explosively Formed Projectile ( EFP ) Development of material in shaped charge liner for EFP

文章讨论了抛物线求积公式在立体体积方面的应用，并由它具体求出了棱台、棱柱、棱锥、球及球缺的体积公式。

In this paper we discuss the application of parabola integral formula in stereoscopic volume , and get concise formula of volume for prism 、 pyramid 、 prismoid 、 spheroid and spherical sector .

根据铸件结构正确选择铸造工艺参数，采用水玻璃砂和树脂砂组芯造型工艺，成功地开发生产出合格的热风炉球缺式炉箅子。

The ball-lacking grate for hot blast stove was successfully produced out with correctly selecting casting process parameters according to cast structure and adopting moulding process with core-composing of water glass sand and resin sand .