The sufficient and necessary conditions of existence of the univalent harmonic orientationpreserving mappings f(z) are given,and f(z) satisfies the equation f =a(z)f z for given Beltrami coefficient a(z)= e iθ (z-a 11- a 1 z)(z-a 21- a 2 z) and maps unit disk U onto a given polygon P .
给出ａ（ｚ）＝ ｅｉθ（ ｚ－ ａ１１－ ａ１ｚ）（ ｚ－ ａ２１－ ａ２ｚ）存在将单位圆盘单叶调和保向地映射为已知的多边形并满足给定的Ｂｅｌｔｒａｍ ｉ方程ｆｚ＝ ａ（ｚ）ｆｚ 的映射的充分必要条件。
It is given that the sufficient and necessary conditions of existence of the univalent harmonic orientationpreserving mapping f(z) which satisfies the equation f =a(z)f z for given Beltrami coefficient a(z)= e iθ ((z-α)/(1-z)) m,m=1,2 and maps unit disk U onto a given polygon P .
我们给出当ａ（ｚ）＝ｅｉθ（（ｚ－α）／（１－αｚ））ｍ，ｍ＝１，２时存在将单位圆盘单叶调和保向地映射为已知的多边形并且满足给定的Ｂｅｌｔｒａｍｉ方程ｆｚ＝ａ（ｚ）ｆｚ的映射的充分必要条件。
Rapid Propagation and Flowering of Calamus simplicifolius in Vitro;
单叶省藤萌蘖芽组培快繁技术及试管内开花
An Analysis on Growth Character of Tissue Culture Families of Calamus simplicifolius;
单叶省藤组培家系的生长特性分析
A comparison on planting effect of tube seedling and normal seed seedling of Calamus simplicifolius;
单叶省藤组培苗与实生苗的造林效果分析
Method: The pliers leaf selects the Kielland obstetrical forceps is left or the right leaf,In the vaginal midwifery,The single leaf of obstetric forceps laying aside occipital bone side underneath is the pivot,The single leaf of obstetric forceps tightly pastes the embryo head,Under the pl.
目的:随着围产医学的发展,我科在产钳术的基础上,使用单叶产钳助产60例的临床应用。