导数

Chapter 4 gives a micellar electrokinetic chromatography method for the quantitative analysis of seven podophyllum lignans in podophyllum emodi wall.

第四章：建立了胶束电动毛细管色谱法分离测定抗癌药物桃儿七中七种主要有效成分的新方法；利用二阶导数电泳图定量测定低含量和在实际样品没有达到基线分离的组份。

Results By using containing ethanol-2mol·L -1 lithium chloride-water(2∶1∶5)solution,there is a very good secondary derivative differential pulse polarogram peak at -1.703 V.

结果 ：秦皮甲素在乙醇- 2mol·L- 1 氯化锂-水(2∶1∶5 )的底液中，于- 1.70 3V处出现一良好的二阶导数差示脉冲极谱法峰，其峰幅值与秦皮甲素在 0 。2～ 1.6mmol·L- 1 范围内呈良好的线性关系(r =0 。9998)，检测限为 5 0nmol·L- 1 。

Objective: To establish a simple rapid method for determining Kjeldahl nitrogen content by 1st order differential coefficient single sweep polarography.

建立用一阶导数单扫描极谱法测定食品中凯氏氮含量的简单、快速的方法。

The secondary derivative differential pulse polarography was developed for the quantitative determination of chrysophanol in rheum.

建立了中草药大黄中大黄酚的二阶导数差示脉冲极谱定量分析方法。

The model of programmed crystallization of SPM was proposed based on the moment transformation of the population considering the agglomeration. The optimal temperature-time curves in a batch crystallizer which maximized the terminal mean size and mean weight size can be determined from the application of the Pontryagin Maximum Principle. The calculated crystallization results heating under optimal temperature were compared with ones under linear or natural heating temperature.

根据第四章所得到的螺旋霉素晶体二次成核和晶体生长和布朗扩散引起的聚集动力学，利用第六章所描述的晶体尺寸分布的各阶矩对时间的一阶导数所构成的自封闭的一阶常微分方程组，采用庞得里亚金极大值原理，以温度为控制变量，在满足某些约束条件下，以最大平均尺寸和最大晶体重量平均尺寸为性能指标，计算出了螺旋霉素间歇结晶的最优温度—时间曲线，并同线性加热和自然方式进行了比较。

A new catalytic kinetic method with second derivative oscillopolarography detection for determining trace amounts of NO〓〓 has been developed. The method is based on the catalytic oxidation of Amarath by potassium bromide in the diluted H〓SO〓. The detection limit of the method is 2.8×10〓g/ml, the linear range of the determination 〓is 0.6～14ng/ml for NO〓.

首次研究了鸡冠红的示波极谱行为，并发现NO〓〓在稀硫酸介质中对KBrO〓氧化鸡冠红褪色反应具有强的催化作用，本文采用两阶导数示波极谱法作监测技术，测定了该催化体系的表观反应级数及动力学方程，建立了催化动力学伏安法测定痕量NO〓〓的新方法。

Limit, derivative, integral power series expansion, differential equation solving certain other.

求极限、导数、积分，幂级数展开，求解某些微分方程等。

Firstly, based on the method of pressure-velocity coupling introduced by SIMPLE algorithm and a revised method of solving the unsteady equation of stream function and vorticity on uniform grid, a special algorithm called primitive-variable-time-dependent approach is formed in the present study. In this algorithm the Navier-Stokes equation in primitive variable form is solved by using the time-dependent approach on non-uniform staggered grid system. The second-order accuracy finite difference is used for the first and second partial derivatives of all variables of the convective terms and diffusion terms.

首先，本文在SIMPLE算法系列处理速度与压力耦合问题的思路和均匀网格下改进的关于流函数涡量方程的数值求解方法的基础上，将非定常原始变量Navier-Stokes方程的求解推广至非等距交错网格剖分，形成了具有本文特色的原始变量时间推进方法，其中对流项和扩散项中各变量的各阶导数均采用二阶精度公式，包括温度在内的离散方程组采用ADI迭代方法求解。

However, the pseudo-triaxial strengths of several rocks from the best fitting solutions have great scatterness from the real magnitudes. Also, it does not correspond to the experimental results that rock has the same strength under conventional triaxial compression and tension; the maximum increase of strength from intermediate principal stress has a linear relation with the minor principal stress; and the first-order derivative of strength has an interruption at the peak point.

此外，统一强度理论认为岩石三轴伸长强度与常规三轴压缩强度相同，在最小主应力恒定时中间主应力引起的强度最大增加值随最小主应力线性增加，且强度关于中间主应力的一阶导数在峰值点是不连续的，这些都与试验结果不能完全协调。

The probability function is definitely a derivative of the Boltzmann probability distribution function.

函数的概率绝对是一个波尔兹曼概率分布函数的导数。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。