ppk的音标

The definition and method of coding and decoding of PPK are introduced and the general mathematics expression of coding and decoding of a k number of pulse PPK in the pulse position at m are provided in this paper.

给出了脉冲位置为m的k个脉冲PPK调制的编、译码通用数学表达式。

Objective To characterize the clinical and genetic features of punctate palmoplantar keratoderma ( PPK) in 40 cases from 5 Chinese Han families.

目的了解中国汉族人点状掌跖角化病（punctate，palmoplantar keratoderma）的临床表型和遗传学特点。

Reductive alkylation of surface amino groups in high activity PPK ( pig pancreas kallikrein) by glyoxylic acid in the presence of sodium cyanoborohydride results in increasing the stability against irreversible thermoinactivation.

以自制高活性PPK为材料，在氰基硼氢化钠存在下经水溶性乙醛酸修饰其表面氨基，使其抗不可逆热失活稳定性有显著提高。