1) semi-focal chord
半焦弦
2) focal chord
焦弦
3) Focus chord
焦点弦
1.
Therefore,it s worthwhile for the essay to introduce several significant and interesting properties of focus chord,and illustrates their application by examples.
在圆锥曲线中,焦点弦是一个非常重要的几何量,是各类考试的重点和热点,长考不衰,角度常变,可谓考试中的常青树,所以,值得我们研究。
2.
By using transformation thought,this paper obtains the focus chord of all kinds of conic section through analyzing a sample in conic section teaching.
利用变换思想,对圆锥曲线教学中的一道例题进行分析,得出了各种圆锥曲线的焦点弦,并引伸其结论,将圆锥曲线的焦点弦变换为中心弦。
4) semi-coke
半焦
1.
Overall mass transfer coefficient and time averaged mass transfer coefficient of adsorption of SO_2 on activated industrial semi-cokes;
活化工业半焦吸附SO_2的总传质系数和时均传质系数
2.
Research progress of removal SO_2 from flue gas using modified semi-coke;
活性半焦(兰炭)烟气脱硫的研究进展
3.
Absorptive desulfurization of FCC diesel over activated semi-coke;
活性半焦在FCC柴油吸附脱硫中的应用研究
5) char
[英][tʃɑ:(r)] [美][tʃɑr]
半焦
1.
FT-Raman spectroscopic characterisation of chars from the pyrolysis of coals of varying rank;
不同煤阶热解半焦的FT-Raman光谱研究(英文)
2.
Char Gasification in Fluidized Bed with CO_2;
半焦的流化床二氧化碳气化研究
3.
Research on the effect of temperature on the production and properties of char from sewage sludge pyrolysis;
热解温度对污泥热解半焦产率与特性影响的研究
6) semi coke
半焦
1.
Thermal gravity analysis on combined combustion features of Shenmu coal and semi coke;
神木煤与半焦混合燃烧特性的热重分析
2.
Having tested the activity of semi coke desulfurizers through high pressure hydrothermal chemical activation ,HNO 3 modification and high temperature calcinations etc.
对工业副产品半焦 ,采用加压水热化学活化法、HNO3活化法和高温煅烧等方法制备出半焦烟气脱硫剂。
3.
The semi cokes from low temperature co carbonization between different plastics (HDPE,PP,PS,PPVC) and coal, as well as the pyrolysis process of pure plastics, were analyzed using PLM.
对塑料（ＨＤＰＥ， ＰＰ， ＰＰＶＣ） 与煤低温共焦化形成的半焦以及单种塑料热解过程进行了显微分析， 结果表明塑料的添加增加了半焦中大尺寸各向异性织构的含量， 增加幅度排序为ＨＤＰＥ＞ ＰＰ＞ ＰＳ＞ ＰＰＶＣ，但并未改变半焦中以镶嵌型为主体的特征。
补充资料：X线管的焦点
X线管的焦点
放射学术语。X线管内X线的发源点，即X线管阳极，接受电子撞击并产生X线的部位。X线管阳极的焦点并非为一个无限小的点，而是具有一定几何学的面积，故又称焦点面。由于X线管阳极靶面实际接受电子撞击的面积与其参与X线几何投影的有效面积不同，故焦点有实际焦点
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条