作者于1981—1987年对直纹稻弄蝶第三代幼虫为害损失进行了研究。
In 1981—1987, the damage to rice of the third generation rice leaf-tier Parnara guttata Bremer et Grey larvae was studied.
目的：研究300名正常白族人指嵴纹数和t三叉，为医学、遗传学、人类学提供正常参数。
Objective: to study the finger ridge count and t triangle of 300 normal people of Bai Nationality, and to provide normal parameters for medicine, genetics and anthropology.
本文定义了三类光栅的光线变换矩阵，并用所给矩阵分析了云纹。
The ray transfer matrix of three kinds of gratings is defined in this paper. By using these matrices the moire fringes are analyzed.
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