1) curve of second order
二阶曲线
1.
Based on the infinitely straight line,this thesis discusses the concepts of curve of second order s center,diameter,advance gradually in the line.
以无穷远直线为基础讨论二阶曲线的中心、直径、渐近线等几个仿射概念,并联系解析几何中的有关性质,深入讨论它们之间的一致性。
2.
On the other hand,the curve of second order composed with those points accord with above-mentioned factor is sure to an ellipse.
运用高等几何中二次曲线的度量理论证明了椭圆的一个基本性质:椭圆上的任一点到两焦点的距离之和为定长;反之满足这一条件的点所构成的二阶曲线一定是椭圆。
3.
This Paper introduces three methods that have never appeared in the ordinary textbooks to solve the asymptotic equation of normalcy curve of second order: using two conjugate drams, involutory correspondence and trangent passing the center.
本文介绍一般教课书里不曾介绍的常态二阶曲线渐近线方程的三种求法 :利用两直径共轭求法、利用对合对应求法及利用过中心的切线求
2) classification of curve of order 2
二阶曲线分类
3) abnormal two-stage curve
变态二阶曲线
1.
It can be proved that abnormal two-stage curve are two straight lines: real straight line and dashed straight line by using projection conversion and symmetry of the coefficients aij = a ji (i=1,2,3; j=1,2,3)in the equation of abnormal two-stage curve 3 0 ,1∑=ij=aijxi x j .
利用射影变换和二阶曲线方程3 0,1∑=ij=aijxi x j中系数的对称性aij=a ji(i=1,2,3;j=1,2,3)两种方法证明了变态二阶曲线为两条直线:实直线或虚直线。
4) nondegenerate second order curve
非退化二阶曲线
5) The normal quadratic curve
常态二阶曲线
1.
The normal quadratic curve is an important object of study in higher geometry.
利用代数方法对常态二阶曲线的判别法进行证明。
6) simplification of equation of curve of order 2
二阶曲线方程化简
补充资料：二氧化双环戊二烯B阶树脂模塑料
分子式：
CAS号：
性质：又称二氧化双环戊二烯B阶树脂模塑料。以二氧化双环戊二烯B阶树脂为基料配制的能采用模塑方法成型的配混料。产品性能为：弯曲强度110MPa，冲击强度5.4kJ/m2；马丁耐热240℃；体积电阻率1.3×1016Ω·cm，介电强度24.5MV/m。由二氧化双环戊二烯B阶树脂，用石英粉等作填料，再加脱模剂配混制得。可用模塑法制成耐热、耐候制品用于军工和民用方面。
CAS号：
性质：又称二氧化双环戊二烯B阶树脂模塑料。以二氧化双环戊二烯B阶树脂为基料配制的能采用模塑方法成型的配混料。产品性能为：弯曲强度110MPa，冲击强度5.4kJ/m2；马丁耐热240℃；体积电阻率1.3×1016Ω·cm，介电强度24.5MV/m。由二氧化双环戊二烯B阶树脂，用石英粉等作填料，再加脱模剂配混制得。可用模塑法制成耐热、耐候制品用于军工和民用方面。
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