导函数

The circumferential interference is found to be an essential mechanism in determining the transport properties of the carbon nanotubes.

我们指出周长方向的波函数干涉是影响碳纳米管电导的重要因素。

A new dynamic sliding mode control law is presented for tracking control of robot manipulator.New switch function based on backstepping method is designed to transfer discontinuity to derivativeness of the control law,so that the chatterings of control can be eliminated.

针对机器人跟踪控制问题，设计了一种新型的动态滑模控制器，采用反演方法设计一种新的切换函数，将不连续项转移到了控制的一阶导数中，得到了输入的平滑性的动态滑模控制律。

The object function of IGM(1,1) is unable to be gained by classical optimization approaches due to its discontinuousness and non-differentiability. We design a genetic algorithm for IGM(1,1) based on its characteristics and test the algorithm with an example. The result acquired shows that the simulation precision of IGM(1,1) model is much higher than that of GM(1,1) mode

由于IGM(1，1)目标函数非连续，不可导，用传统的优化无法求解，本文针对IGM(1，1)模型的特性设计了求解该优化模型的遗传算法并进行了算例验证，求解结果表明了IGM(1，1)模型的模拟精度远高于GM(1，1)模型。

Some new conceptions are presented about the dissipativity theory of Ito stochastic differential systems as follows:dissipativity in module,equi-dissipativity in module and uniform dissipativity in module.

提出了有关Ito型随机微分系统耗散性理论的新概念：按模耗散、按模等度耗散和按模一致耗散，并利用Lyapunov方法，借助于Ito微分公式沿着Ito型随机微分系统的解对所构造的Lyapunov函数求导数，给出了Ito型随机微分系统有关按模耗散理论的一些代数判据，获得了与确定性常微分系统耗散性理论相对应的结论，最后的算例证明了该方法的有效性和可行性。

Because the genetic algorithm is a global stochastic searching method, and even if the defined fitness function is indifferential or uncontinuous, it is also possible to obtain the global optimal solution with a considerable probability. Thus there will be widely practical application in the engineering field.

由于遗传算法是一种全局随机搜索方法，即使定义的适应性函数不可导或不连续，它也可能以很大的概率求得全局最优解，因而在工程领域中将有十分广泛的实际应用前景。

In this paper, we researches the sum of U- relative deficiency of meromorphic functions, which generalize .

本文我们主要研究亚纯函数导数的U相对亏量和，得到一些推广结果。

To cope with highly nonlinear, nondifferentiable and multi-peak objective function, evolutionary algorithms which have the advantage of global solution searching can overcome the drawbacks of conventional algorithms such as slow speed, relatively poor precision and convergence to local solutions.

针对微波领域中优化问题的目标函数的高度非线性、不可导、多极值等特点，利用演化算法的全局搜索特性，可以避免确定性优化方法收敛速度慢、精度低、易于收敛到局部极小值的缺点。

With the frequency and mode shape being regarded as functions of damage parameters, the overdetermined algebraic equations with damage parameters as unknowns can then be constructed by differentiating frequency and mode function on the basis of structure mode finite element formula, the damage parameters of which are obtained via Taylor expansion.

本方法从结构模态有限元算式出发，把频率和振型看作损伤参数的函数，经过泰勒展开获得频率、振型对损伤参数的一阶偏导数，然后构造以损伤参数为未知量的超定线代方程组，求解得到全部损伤参数值。

With the frequency and mode shape being regarded as functions of damage parameters, the overdetermined algebraic equations with damage parameters as unknowns can then be constructed by differentiating frequency and mode function on the basis of structure mode finite element formula, the damage parameters of which are obtained via Taylor expansion. The whole damage parameters can be found via solving the algebraic equations.

本方法从结构模态有限元算式出发，把频率和振型看作损伤参数的函数，经过泰勒展开获得频率、振型对损伤参数的一阶偏导数，然后构造以损伤参数为未知量的超定线代方程组，求解得到全部损伤参数值。

In the SAWH model, the watershed is divided into model computation units according to topograph, and the MCU is then partitioned to several sub-regions according to land use, the heterogeneity of soil hydraulic conductivity and micro topograph is descriped by propobility density function and incorporated into the upscaled equations.

模型中流域下垫面特性的宏观不均匀性通过流域划分和模型计算单元内分区进行考虑，土壤饱和导水率和地形的微观不均匀性通过概率密度函数进行描述。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。