Based on production decline curve equation, through mathematical derivation, a kind of logarithmic type production decline curve equation is obtained.
在产量衰减曲线方程的基础上，通过数学推导，得到了一种对数型产量衰减曲线方程。
Through theoretical analysis of rheological properties of frozen soil, the logarithmic creep equation of frozen clay is established under complex stress state.
通过对冻土的流变特性进行理论分析，建立了冻黏土在复杂应力状态下的对数型蠕变方程。
According to the working principle of a excavator, this paper describes mathematically that the trace equation of digging processes is of logarithmic helix.
根据挖掘机的工作原理，从数学的角度阐述了挖掘过程的轨迹方程应是对数螺线。
When the Einstein logarithmic resistance formula is used to calculate the resistance of sidewall and bed flow respectively, the closure problem of equation group can be solved.
将分别对应于边壁和床面的爱因斯坦阻力公式应用阻力计算中，可以解决方程组不闭合的问题。
When the Einstein logarithmic resistance formula is used to calculate the resistance of sidewall and bed flow respectively, the closure problem of equation group can be solved.
将分别对应于边壁和床面的爱因斯坦阻力公式应用阻力计算中，可以解决方程组不闭合的问题。
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