参数方程

The algorithm is deduced and difference equation of parameter error given by which the algorithm convergence is proved theoretically.

对该算法进行了推导，并给出了参数误差的差分方程，在理论上证明了算法的收敛性。

We estimate the parameter with least square method according to the difference equation

我们根据差分方程用最小二乘法来估计参数。

In the analysis of the circuit, the differential equation based on the theory of electromagnetism had been established; the circuit qualitatively had been analyzed, and the current on the coil in the process of experiment had been calculated.

在电磁压制放电电路的模拟分析中，基于电磁学理论建立了放电过程的微分方程，对电路作了定性的分析；通过对实验参数的模拟，求解出实验过程中线圈上的载荷电流。

The authors propose a new method that is easy to implement in engineering practice, i.e., to identify parameters of excitation model in the form of differential equation by means of nonlinear direct optimization algorithm.

提出了一种新的、工程中容易实现的方法，即利用非线性直接优化法辨识微分方程形式的励磁模型参数。

In Chapter 4,we consider the existence of positive periodic solutions for impulsive differential equations with a parameter.

第四章讨论了一类含有参数的脉冲微分方程正周期解的存在性。

In the third chapter, we discussed the problem about partial differential equation with small parameter on the high-order item.

第三章主要对小参数在高阶项的偏微分方程进行讨论，也就是一般意义上的边界层问题。

We apply a differential evolution algorithm to study parameter inversion of two-dimensional wave equation.

利用微分进化算法进行二维波动方程参数反演的研究。

Key words two-dimensional wave equation; parameter inversion; differential evolution algorithm; finite element

利用微分进化算法进行二维波动方程参数反演的研究。

Appling least absolute deviation to calculate variable parameter of differential equation,robust grey model RGM(1,1) has been set up and used to forecast the settlement tendency of building.

将最小一乘法应用于微分方程变量参数求解，建立稳健灰色模型RGM(1，1)，并将其应用于建筑物沉降预报和比较。

This paper considers existence of extreme solutions to first-order differential equations with a parameter by the method of lower and upper solutions with monotone iterations,and monotonic sequence is uniformly converged to the extreme value solution of nonlinear equation after being constructed.

文章利用上下解方法和单调迭代技术讨论了含有一个参数的微分问题极值解的存在性，通过构造单调序列使这个单调序列一致收敛于非线性方程的极值解。

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。