1)  DFMA
DFMA
1.
Modeling of feature-based product design system for DFMA;
面向DFMA的基于特征的设计系统建模
2)  DF
DF
1.
Experiment and Analysis of Continuous Wave DF Chemical Laser without Diluent;
连续波DF化学激光器无稀释剂实验及其分析
2.
The Research on the Comparison of Unit Root Test of DF,ADF and PP;
单位根的DF、ADF检验与PP检验比较研究
3.
Research has been done on several kinds of popular frequent itemset mining algorithms (Apriori,DF,FP-growth and DCI) and study their characteristics.
研究了当前几种时兴的频集挖掘算法 (Apriori,DF,FP- growth和 DCI)及其技术特点 ,并对其分类和界定适用范围。
3)  steel DF
DF钢
4)  DF-V
DF-V
5)  d f/ d t
df/dt
1.
With the function of d f/ d t slip,it is mainly used in the relay protection test instrument as its digital amplitude and phase modulated voltatge source.
该滑差源具有df/dt频率滑差功能,主要用于继电保护频率滑差试验仪的核心部件数字调幅调相滑频电压源。
6)  DF-REML
DF-REML
1.
In this study,derivative-free restricted maximum likelihood(DF-REML) method to estimate genetic trend for productive traits(raw cashmere weight,live body weight,cashmere thickness,staple length,fibre diameter,and fibre length) of White Cashmere Goat in Inner Mongolia.
本研究利用非求导REML方法(DF-REML)分析了内蒙古白绒山羊的生产性状(抓绒量、体重、绒厚、毛长、绒细度以及绒长度)的遗传趋势。
参考词条
补充资料：DF
分子式：
CAS号：

性质：衡量空气过滤器过滤效果的一项指标。表示经过过滤器后尘粒浓度降低的程度。为穿透率（即经过滤器后仍然穿过的尘粒量与原始尘粒量之比值）的倒数。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。