first-order equation

Its equation of attitude motion has the form of first circulating integration and is to be deduced a first-order equation while equations of vibration are linear , time-varying coefficient , two order differential equation .

其姿态运动方程是一次循环积分的形式，成为一次方程，而振动方程则是一组时变系数线性二次微分方程。

The adsorption kinetics follows the first-order equation .

吸附动力学符合一级反应方程。

The release kinetics in vitro obeyed first-order equation .

脂质体的体外释放符合一级方程；

The degradation process of methamidophos in soil environment followed the first-order equation , and its half-life was about 2 days .

甲胺磷的土壤降解过程符合一级动力学方程，降解半衰期为2d左右。

The results showed that the kinetics of Zn2 + and Cd2 + secondary adsorption could be described well with the first-order equation .

结果表明、Zn~（2+）和Cd~（+）的次级吸附动力学可用一级方程拟合。

As for the first-order equation , we treat it analytically , while we use truncated Taylor expansion to approximate the second-order one .

对于一阶方程，我们运用直接积分。而对于二阶方程，我们运用截断的Taylor展开式来逼近。

Both first-order equation and parabolic diffusion law equation were the most adaptable to describe the NH4 + - fixation and fixed-NH4 + - release kinetics .

一级动力学方程和抛物扩散率方程均适合于拟合土壤对铵离子矿物固定和固定态铵释放的动力学资料。

Results The absorption kinetics was satisfied with first-order equation . The constant of the first-order reaction is 0.068 5 h ~ ( - 1 ) at 25 ℃ . Its apparent activation energy is 5.60 kJ / mol.

结果壳聚糖与Cu（Ⅱ）离子的吸附配位反应符合一级反应动力学方程，25℃时其吸附反应速率常数为0.0685h-1，吸附反应的表观活化能Ea为5.60kJ/mol。

Curve Fitting Based on a Linear First-order Differential Equation

基于&阶线性微分方程的曲线拟合法

A Method of Identifying Parameters in a Kind of Time-varying Linear First-order Differential Equation System

一类时变一阶线性微分方程组参数辨识的一种方法

The discontinuous - streamline diffusion method for first-order hyperbolic equation

一阶双曲问题的间断流线扩散法

Determination of the adsorbed quantity at equilibrium about the first-order kinetic equation of ion adsorption

离子扩散与交换的一级动力学方程中平衡吸附量的讨论与确定

Investigating the first-order indeterminate equation by means of Petri nets

用Petri网研究一次不定方程

The Extending of Integrability Types of First-order Differential Equation

一阶微分方程可积类型的扩充

The Trace of Power Degradation of trace ethylbenzene in water is described by the first-order kinetic equation .

紫外线（UV）去除水中微量乙苯（<10mg/L）可以用一级反应动力学方程描述。

On the basis of steady state tire model and first-order differential equation , the property of relaxation length in transient process is studied .

本文在稳态指数统-模型和-阶线性微分方程的基础上，研究了大侧偏角下动态过程中侧偏松弛长度的特性。

The lumped integrability of first-order explicit equation

一阶显式方程的分块可积性

Multiple scattering correction , first-order differential equation and second-order differential equation are used for the spectral preprocessing , and the influence of the three pretreatment methods for modeling is discussed .

其中光谱预处理采用多元散射校正、一阶微分、二阶微分三种方法，并讨论了这三种预处理方法对建模的影响。

In addition , the content of nitrogen leaching losses was found to fit well the first-order kinetics equation , but the content of ammonia volatilization followed the zero-order kinetics equation .

木质素包膜复合肥中N素的淋溶损失符合一级动力学方程，土壤中肥料的氨挥发符合零级动力学方程。

A quasi first-order kinetic equation was derived and the parameters of the model were simulated from the experimental data . The curves calculated by the model were in accordings with the experimental data .

建立了拟均相一级动力学模型，从实验数据模拟得到了模型参数，模型计算值与实验数据基本一致。

Secondly , the propagation equation of monochromatic beam passing the parallel grating pair has been deduced using the theory of plane-wave angular spectrum and the first-order diffraction equation of grating .

其次，利用平面波角谱理论和光栅一级衍射方程，导出了单色光束通过平行光栅对的传输方程。

The results show ~ 3H-BBP is absorbed rapidly and detected in blood after 5 min , then its concentration reaches top at 0.5 h. First-order linear equation and two-compartment open model are gained .

实验结果表明：3H-BBP经口染毒后被迅速吸收，5min即在血中检测出，0.5h达高峰，并呈一级动力学线性过程，符合二室开放模型；

Applying the rate equations to a train of strong pulses through a travelling-wave semiconductor laser amplifier ( TWA ) a simple first-order differential equation has been derived to determine the output pulse or the singal gain of the TWA .

对于一串强脉冲信号通过行波半导体激光放大器（TWA）时，应用速率方程推导出一个简化的一阶微分方程，可用来确定输出脉冲信号或TWA的信号增益。

First-order kinetic equation ( One pool model ) could preferably described the mineralized process of brown soil ( 0 ~ 60 cm soil layer ) organic N , and the parameters which were fitted by one pool model expressed the mineralization characteristics of soil organic N.5 .

一级动力学方程（Onepool模型）能很好地描述棕壤（0～60cm土层）有机氮的矿化过程，且由Onepool模型拟合得出的矿化参数能够表达土壤有机氮的矿化特征。

The degradation of oil pollutants fit the first-order kinetic equation , and when two sizes of sands were added in the seawater , the half-time of oil pollutants reduced from 31.9 days in seawater system to 22.4 days and 19.5 days in the seawater-sands system respectively .

海水中石油污染物的降解符合一级动力学模式，当含砂体系中砂的粒径不同时，石油污染物降解的半衰期可由海水体系的31.9d缩短到22.4d和19.5d。

Effective solution method for the first-order ordinary differential equation system

一阶常微分方程组的一个有效解法

Initial value problem iterative method for first-order implicit different equation

一阶隐式微分方程初值问题迭代法

Application of Variable Transformation Method for First-Order Ordinary Differential Equation

变量变换在解一阶常微分方程中的应用积分变换法解微积分方程、方程组及求实积分

The hydrolysis reaction process can be described using first-order reaction dynamic equation .

增大酸用量和提高温度可使水解反应更彻底，水解过程可用一级反应动力学方程进行描述。

The first-order thermal reaction equation has been widely introduced into basin modeling .

一级热反应方程采用质量作用定律，已较广泛地引入盆地模拟。