Total arable land dynamicbalanceequation stipulates the control subject for the regional arable land system un-der the base of predictable technology and population pressure.
在可预知的技术进步和人口压力背景下，耕地总量动态平衡方程为区域耕地系统的状态规定了调控目标；
2
Based on the story model of spatial member, the supplemental damping matrix, dynamicbalanceequation and relative energy balance equation of structures with viscous dampers are derived.
基于结构空间杆系-层模型，推导了粘滞阻尼器减震结构的附加阻尼矩阵、动力平衡方程和相对能量方程。
3
How to calculate the water invasion rate correctly while we study the performance and calculate the dynamic reserves of the gas reservoir with material balanceequation is still a difficulty for long.