近似法

Chapter 3 studied Monte Carlo methods to four special classes of the stochastic non-smooth convex programming.

第3章研究了四种随机非光滑凸规划问题的Monte Carlo近似法。

In final chapter, we will discuss a perturbation method to solve the one-dimension Fokker-Planck equation with a constant diffusion coefficient and time-dependent drift coefficient.

所以我们在论文最后介绍一种新的方法来处理某一种Fokker-Planck方程式，这个方法就是微扰近似法。

And by using IM, the RCS of a dielectric plate and array antennas of dielectric cylinders guiding electromagmetic field with finite length are calculated. IM method gets rid of the inversion of a large matrix and its solution can be fast convergent, so it is simple and especially fit for solving the problems with which the high-frequencies and the low-frequencies deal difficultly.

本文所作主要工作及贡献如下：（1）在考虑馈源匹配良好的状况下，用各种高频近似法对卡塞格伦天线、二维与三维反射面天线的电磁散射与RCS进行了全面地分析计算，并对旋转反射器表面形状进行了低RCS外形优化设计。

Then the formulae of defect mode frequency,and the quality factor are obtained with the first order approximation.

研究结果表明：一级近似法能很好地解释中心频率附近介质层厚对缺陷模频率的影响。

By introducing non-relativistic, adiabatic and quantum approximation to NLCMEs in the FBG with hyperbolic tangent apodization, and assuming the soliton as a particle with low velocity and invariant energy, the track equation of soliton is obtained.

利用双曲正切中间变迹光栅中的NLCME，引入非相对论-绝热-准量子近似法，将光栅孤子作为一个低速运动且能量守恒的整体进行分析，得到了孤子的轨迹方程。

This paper presents some approximate algorithms for minimax nonlinear programs with inequality constraint s by using maximum entropy method and algorithms relevant to nonlinear programming with inequality constraint s,and convergence theorems concerning these algorithms are given.

结合极大熵方法与不等式约束非线性规划的有关算法，提出了求解不等式约束极小极大非线性规划的一种近似法，并讨论了算法的有关收敛

The disadvantages of obtaining control in approximate ways are analyzed, and the optimality criterion based on genetic algorithm is proposed.

分析了使用近似法求解控制量的缺点，据此提出了基于遗传算法的控制量优化求解策略。

In this article,we firstly study the Rabi model in a concise coherent statemethod and give some results and then a non-perturbative and systematic coherentstate approximation is pointed out to solve the Spin-Boson model.

在这篇论文中，我们首先研究了无旋波近似的J-C模型，给出一些简单的结果，然后在耗散二态系统的研究过程中，给出一套非微扰的、系统的方法-相干近似法。

While for the sinusoidal approximation method, a detail derivation of the amplitude of each sinusoidal function is re-derived for completeness.

为完整性，文中亦详细推导正弦函数近似法中各个频率之振幅。

So a farther study has been made, it add time delay to the controlling system and can control some time delay systems inerrably

对于各通道滞后时间相差很大的系统本文提出一种新的解决方案，即将提取时滞因子与近似法结合起来，可解决任何时间滞后的问题。

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。