1) point range
点列
1.
An Analytic method to prove the equaltherom of point range of perspective correspondence and compound ratic of line pencil is given under the condition of infinite elements,which makes the theorem natural and understandable.
给出了透视对应下点列和线束复比(交比)相等定理在无穷远元素下的解析证明方法,使得这一定理在射影平面上的成立显得自然和易于理
2) sequence of points
点列
3) range of points
点列
1.
Then,it discusses two natures of this correspondence and sloves such a problem-If we have known a range of points on a straight line,then we can get another range of points with which a projective collection can be formed on this straight line.
本文先定义了一个圆和直线间的一一对应 ,然后讨论了该对应的二个性质 ,并解决了这样一个问题 :已知直线上一点列 ,求作该直线上与之成射影对应的另一个点
4) plane finite points
平面点列
5) separation location
解列点
1.
Based on topological structure of network, according to distribution feature of transient energy in network and the change feature of branch phase angle difference, the criterion using branch phase angle difference was proposed, the distribution of out-of-step separation device in power system and the selection of out-of-step separation location were investigated.
基于网络拓扑结构,根据系统失稳时暂态能量在网络中的分布变化特性以及支路两端相角差的变化特点,提出了利用支路两端相角差作为失步解列原理的判据,并对失步解列装置在电力系统中的布点及解列点的选取进行了探索性的分析,指出解列点的选取不应仅以平息振荡为原则,还应保证尽量增强解列后系统的自恢复能力。
6) length of point-series
点列长度
补充资料:点双列相关
点双列相关
point biserial correlation
点双列相关(point biserial eorrelation)当变量:是二分变量,而变量y是一个连续变量时,估计这两个变量之间关联程度的测度。用点双列相关系数与,来度量。如:与y两个变量中,有一个数列为两分名义变量,即只有两种情况的变量,如对与错,及格与不及格,男与女等;而另一个变量为等距的或比率的连续变量时,就要使用点双列相关。点双列相关多用于鉴定一个测验中各个问题的价值,即用于评价测验的效度,其计算公式为: 、=竿·栖 四Sr 式中瓦是与一个两分变量对偶的一列连续变量的平均数;凡是与另一个两分变量对偶的相应的连续变量的平均数。p是一个两分变量与总次数之比,q是另一个两分变量与总次数之比(q=l一),S,为连续变量的标准差。 (任旭明撰金志成审)
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