Please outline the composition principles for ascertaining a nutrient solution formula.
请简要说明在确定营养液配方时的组成原则。
The suitable nutrient solution formula was calculated according to the water quality in Beijing.
根据对主要大量元素的实际吸收情况，推算网纹甜瓜合适的营养液配方。
In this paper, using total differentiation method and variation of constants, we give general solution formula of Bernoulli equation with different methods.
本文使用全微分法和常数变易法，从不同角度给出伯努利方程通解的公式。
The direct solution formula for the curve length of a theoretical control point on the transition curve is proposed, with the solution of high order equation being avoided.
导出了隧道控制测量中缓和曲线理论投点曲线长的直接求解公式。
In this paper, we presented the problem of multi-criterion fitting to a given family tree and gave a solution formula to the multi-criterion fitting problem of the finite discrete family tree.
本文提出了给定谱系树的多准则拟合问题，并对有限的离散型谱系树多准则拟合问题给出了求解公式。
In this paper, we presented the problem of multi-criterion fitting to a given family tree and gave a solution formula to the multi-criterion fitting problem of the finite discrete family tree.
本文提出了给定谱系树的多准则拟合问题，并对有限的离散型谱系树多准则拟合问题给出了求解公式。
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