tdn meaning in English

可消化总养分
总可消化养分
总消化养分

The following ration will contain approximately 18 % crude protein and 80 % tdn on a dm basis
下面的日粮大约含有18 %的粗蛋白和80 %的可消化总养分（干物质基础）。
Based on fuzzy control theory and the computer control technology of tdn - acs + experimental system , a computer control system of fuzzy technology was designed
摘要以模糊控制理论为基础， tdn - acs +计算机控制技术试验系统为平台，设计了一个基于模糊技术的计算机温度控制系统。
In the article has simulation weighing system with tdn - ac / acs system and calculate its theory value and compare to the value of identified , then has the mass magnitude size . on the other hand in the article utilize a controlling method . and it controlls the hardware , then it can improve the dynamic weighing system performance and minish the error of the dynamic system
由于控制对称量精度影响同样很重要，所以本文还运用了一种控制方法来改善控制过程，由于在不同的环境下，控制的设备不同，系统的一些参数也要变化，这样如果把控制点确定为固定的值，有时误差会很大，本文是在每次识别系统一些参数来改变控制点的大小。