迭代法

Simulation results are included to show that the optimal policy given by this method can well approach to the accurate one given by value iterative method on the case of having complete information, and the constringent rate of policy is quickly than others.

仿真表明，该算法所求解的控制策略与用值迭代法在模型已知的情况下，所求得的最优策略非常逼近，且该算法使得策略的收敛速度大大地加快了。

Construction Control of Extradosed Cable-stayed Bridge;2. The main bridge of the Kaifeng Yellow River 2nd bridge of Daguang freeway is 7-tower and 8-span prestressed concrete extradosed cable-stayed bridge .

以大广线开封黄河二桥主桥——7塔8跨预应力混凝土矮塔斜拉桥为研究对象，借助MIDAS/Civil有限元程序建立了该桥梁空间有限元计算模型，采用子空间迭代法计算了桥梁的动力特性。

For obtaining the numeral solutions of round elastic plates in axisymmetrical deformation with varying-thickness in nonlinear deformation in the unsteady electromagnetic field and mechanical field,by establishing the equations of motion,the equations of distortion,the equations of Lorentz force,the equations of electronic dynamic mechenical,and adopting iterative method,we gained the nonlinear magneto-elastic calculation method and outcome of current-carrying shell,and gained the influencing degree toward mechanical parameter of varying thickness round ferreous plates in the electromagnetic field and mechanical field.

为了获得内边界固定的环形导电薄板在均布力与横向磁场作用下的变形问题的数值解，通过建立运动方程、变形方程、电动力学方程和洛仑兹力方程，运用迭代法得出了载流板壳的非线性磁弹性的计算方法和结果，以及机械场、电磁场对铁质变厚度圆板各力学参量的影响程度。

If the matrices are different, then the research methods of iterative methods will also be different.

矩阵不同，迭代法的研究方法也会有所差异。

Unitary linear regression is done between w~e、 w~ρ、 e~ρ、w_L~w_P. For α_v 、 C_ c between w、ρ、 e、 w_P in eastern China, unitary linear regression is done to silty clay as well as multivariant regression with coefficient iteration method and least-squares procedure are done to all kinds of soil, and the two results are compared. Unitary linear regression and multivariant regression are done to c_q、φ、 c_d、φ_d between e and I_P. Unitary linear regression and multivariant linear regression are done to napierian logarithm of q_u between e 、 I_L、 w_P and w_L, then the equations of regression are checked with other parameters.

对物理指标含水量～孔隙比、含水量～湿密度、孔隙比～湿密度、液限～塑限作了一元线性回归；对华东地区粉质粘土的压缩系数、压缩指数和含水量、湿密度、孔隙比及塑性指数作了一元线性回归；对华东地区所有土类的压缩系数、压缩指数和物理性质参数用系数迭代法和最小二乘法作了多元线性和非线性回归，并对两种方法得到的回归结果作了比较；作了快剪强度指标和固结快剪强度指标关于孔隙比和塑性指数的一元线性回归和多元线性及非线性回归；对无侧限抗压强度的自然对数值和孔隙比、液性指数、液限及塑限作了一元和多元线性回归，并用其它工程的参数对回归方程进行了检验。

At the same time,dynamical characters of stronglynonlinear system under nonresonant and resonant conditions is analyzed in de-tail,the frequency-response curves and stable ranges are drawn,and validity ofthis method is proved through comparison with the well-known results.

同时，详细分析了非共振和共振情况下强非线性系统的动力学性态，给出了各种不同情况下的频率响应曲线及周期解的稳定区域，并通过与现有的众所周知的结果的比较，表明了映射迭代法的正确性及实用性。

And two kinds of efficient iterative method, GMRES and Bi-CGSTAB, with different preconditioners are applied to solve the resulted nonsymmetrical systems of Fourier coefficients.

接著利用两种有效的迭代法(GMRES，BI-CGSTAB)来解离散后，傅利叶系数所形成非对称的线性系统并配合不同的preconditioner。

The main works by this paper are as followings: In allusion to the concentrically braced frame, we make use of the STS program to design structure, after pushover analyzing with the program of SAP2000, through iteration and finally solve the structural influencing coefficientare, displacement coefficient, ductility coefficient and overstrength coefficient, then analyze the homologous variety regulation.

本文研究的主要内容如下：基于现行抗震设计规范，针对V型中心支撑钢框架，采用STS进行结构设计，借助于Sap2000程序进行Pushover静力推覆，通过迭代法求解了结构的结构影响系数、位移放大系数、超强系数、延性系数，并分析相应的变化规律。

In this paper, we investigate the comparisons of asymptotic rates of iteration matrices of preconditioned and general iterative methods for solving non-singular linear systems.

本文讨论了解非奇异线性方程组的预条件方法与一般迭代法的比较理论。

A torsion difference scheme of the bar with sectorial cross-section is developed in polar coordinate system .

导出了极坐标系下扇形截面杆件扭转问题的差分格式；用逐次超松驰迭代法求出了扭转应力函数差分值。

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。