This paper defined the projective transformation on projection plane produced by polar transformation,studied the properties of projective transformation on projection plane thus produced,and obtainted some theorems about the projective transformation on projection plane produced by polar transformation.
利用配极变换定义了由2个配极变换诱导产生的直射变换,并把此诱导产生直射变换与一般配极变换和圆锥曲线相联系,得到了由配极变换诱导产生的直射变换的若干重要而有趣的性质。
It is pointed out that the existing definition of internal force is not invariant to Euclid collineration.
对多机械臂抓取物的受力分析表明，现有物体内力的定义不具备欧几里德直射变换下的不变性，导致模型化的内力与物体实际所受内力不符，基于这样的定义进行载荷分配并实施协调控制会造成物体或机械臂的损坏。
In gas-liquid screen type WFGD,distribution of falling liquid about upright jet determines directly desulfuration efficiency.
在液幕式湿法脱硫中,竖直射流回落液量分布情况直接决定脱硫效率。