two-point distribution

The principle of three point method and its variation including two point method and four point method for roundness error separation was introduced.

论述了圆度误差分离的三点法及演化形式——二点法和四点法的基本原理 ,通过分析它们各自的特点和测量精度指出权函数的取值是影响测量精度的关键因素 ,应通过合理选择测量系统参数以避免谐波抑制的发生 ,而且应针对具体情况选择适当的圆度误差分离方

Effects of Tetranychus urticae Koch and Mechanical Damage on Volatile Infrochemicals of Tobacco;

机械损伤与二点叶螨取食对烟草挥发性信息化合物的影响

Effects of Tetranychus urticae Koch and Mechanical Damage on Volatile Infrochemicals of Solanum melongena;

机械损伤与二点叶螨取食对茄子挥发性信息化合物的影响

Influence of cyhalothrin and fenpropathrin on life-vigor and fecundity of Tetranychus urticae Koch;

三氟氯氰菊酯和甲氰菊酯对二点叶螨生命活力及繁殖力的影响