对数方程

通过对有机质、全氮、C／N比差异较大的10种土壤进行盆栽和培养试验，用对数方程、指数方程、幂函数方程对土壤氮素矿化过程进行了摸拟。

The pot and incubation experiments were carried out with 10 soils by different indexes including organic matter , total nitrogen content and C / N ratio , nitrogen mineralization processes of soils are simulated using logarithmic , exponential and power functions .

⑵沉积物中氨氮随时间的释放函数符合对数方程。

⑵ The release of ammonia nitrogen in sediments over time showed the law of logarithmic equation .

双对数方程在模压中的应用&压坯形状对方程的影响

Application of double-logarithmic equation in die compaction-effect of compact shape on the equation

根据双对数方程计算其结合常数和结合位点数。

The binding , constants K and the number binding site n were obtained by double-logarithm regression equation .

结论：单相抑郁症的复发累积概率能用对数方程描述，根据这一方程，可在15年内推算一个时点到另一时点的区间复发概率。

CONCLUSION : Recurrent cumulative probability can be analyzed with logarithmic equation , and the recurrent rate during an interval in 15 years can be calculated according to the equation .

本文提出用对数方程作为应力应变关系及高温短时应力松弛的数学模型，进而求得了板料在热校形中的塑性纯弯曲回弹角度及回弹半径公式。

The paper suggests the use of a logarithmic equation as a mathematical model of the true stress-strain relation and short-time stress relaxation . Furthermore , we derived a series of formulas for spring-back angle and radius in pure plastic bending and hot sizing .

本研究在面积为80m2的啤酒废水现场中型试验中，分别得出了淹水期入渗速率递减曲线和落干期入渗速率恢复曲线，它们可分别用指数方程和对数方程来表达。

The decrease curve and recovery curve of infiltration rate in flooding and drying periods . are obtained from the in situ test with the area of 80 m2 and flooded with brewery waste water . The curves can be expressed with exponential and logarithmic equations respectively .

研究了珊瑚混凝土的弯曲疲劳寿命的概率分布，结果表明珊瑚骨料混凝土小梁试件的弯曲疲劳寿命较好的服从Weibull概率分布，建立了考虑失效概率的双对数疲劳方程和单对数疲劳方程。

The probability distribution of the bending fatigue life of the coral concrete results show that coral aggregate concrete beam specimens bending fatigue life of the Weibull probability distribution , consider the failure probability of double logarithm fatigue equation and single the number of fatigue equation .

莫尔包络线对数模型方程的建立与应用

Establishment and application of logarithmic model equation of Mohr envelop

T分布族对数似然方程根的大样本性质

Large Sample Size Property of the Root of Log Likelihood Equation for T Distribution

用第四纪冰期时一月份的地温及深度值，拟定出深度&地温对数曲线方程，并用其求出不同地点的最大冻结深度。

After analysing the curve figures , the authors calculated the logarithm equations of the ground temperature of different depths , then to obtain the average maximum frozen depth during the Quaternary ice age .

得出多孔混凝土强度随龄期的发展规律，弯拉强度、劈裂强度与抗压强度的相关关系，抗压强度与空隙率的关系以及两种形式下的双对数疲劳方程；

The strength development with time , relationships between flexural tensile strength , split strength and compression strength , the relationship between compression and porosity , and two types of double logarithm fatigue equation of porous concrete are got .

在分析钢管冲压剪切过程中剪切力变化以及钢管变形原因的基础上，采用变态对数曲线方程设计了新型的刀片形状曲线，大大地提高了钢管剪切正圆度。

Based on analyzing the variation of shearing force and the tube deformation during stamping and shearing process , a new curve of the shearing knife shape was designed by the abnormal logarithmic curve equation to improve the regular roundness of sheared tubes .

文章针对手工定线、推流的诸多问题，采用幂指数方程、对数函数方程、浮动多项式方程等3种数学模型对水位流量关系模型的建立进行了一些初步分析、探索。

The paper makes some analysis and discussion for establishing stage-discharge relation model , selecting 3 mathematic models : power exponential equation , logarithmic function equation and floating polynomial equation , in allusion to the problems of decided line and calculated discharge by handwork .

通过田间试验和SPSS回归模拟，应用均值土壤一维垂直入渗Philip公式计算累计入渗量，研究田间尺度降雨排水中氮、磷浓度的变化规律，拟合控制排水氮、磷浓度对数函数模拟方程。

Based on field experiments , SPSS regressive simulation , and the calculation of accumulative infiltration amount by the averaged 1-D Philip formula for vertical infiltration in soil , the variation law of nitrogen and phosphorus concentration in drainage of rainfall in farmland was studied .

以时效试验求算时间-对数剂量回归方程。

By use of time effect experiment to calculate time logarithm dose regression equation .

2效量药物动力学参数估测①观察量效关系，确定镇痛率对数剂量回归方程。

2.2 To determine pharmacokinetic parameters of drug effect ① To observe dose-effect relation , determine opioid analgesic rate & logarithm dose regression equation .

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。

Through theoretical analysis of rheological properties of frozen soil , the logarithmic creep equation of frozen clay is established under complex stress state .

通过线性对数的长期方程和误差纠正模型估计了这六个因素对这三个区域能源使用效率的长期和短期影响。

It estimates the six variables ' long-term and short-term impact on the three regional energy use efficiency by linear-log long-run equilibrium equation and error correction model .

文中给出了材料的配比试验和蠕变试验的结果，得到按对数型蠕变方程和西原模型蠕变方程拟合的回归系数。

In this paper , the results of the mixing ratio test and creep test of the mixture are given , with the regression coefficients according to logarithmic creep equation and K-B model 's creep equation .

二维带对数项非线性Schrodinger方程的整体吸引子

Global Attractor for Two-Dimensional Nonlinear Schrodinger Equation with Logarithmic Term

以急性死亡率法求算时间-对数体存量回归方程。

By means of acute mortality to calculate time & logarithm systemic cumulation quantity regression equation .

进一步用威布尔分布拟合不同存活率下的寿命大小，回归出具有不同存活率的单对数和双对数疲劳方程，为实际工程提供理论依据。

More , the fatigue lifes of different livabilitys are simulated through using Weibull and both single-logarithmic and double-logarithmic fatigue equations of different livabilitys are regressed to offer theory evidence for actual engineering .