迭代法

The former can be computed by the iterative physical optical method directly and the later by the boundary element method, the generalized network principle and the reciprocity theorem are then employed to deal with the coupling across the aperture opening.

首先根据等效原理将目标散射场进行分解，分别采用迭代物理光学法和边界元法计算槽缝填充的电大目标和槽缝散射，并应用广义网络原理和互易定理处理口径耦合问题。

The stable completion state of rope way bridge is determined by reiterative and finite element method.

以云南澜沧江糯扎渡水电站临时施工索道桥为工程背景，利用有限元法反复迭代确定了临时索道桥的成桥状态。

The calculation of the rotordynamic coefficients of a multistepped annular seal in hydraulic turbines is discussed in this paper. Based on the Hirs' turbulence lubrication theory and the bulk flow model, the governing equations for the flow in the seal are developed by using the Moody's friction equations. The governing equations are perturbed when the rotor and the stator are coaxial. The Runge Kutta integration method and the Newton Raphson iteration method are used to solve the perturbation equations....

本文首先在Hirs紊流润滑理论的基础上，采用体积流动模型及Moody摩擦方程建立起阶梯口环水封中流体流动的控制方程，将各个方程在转子与定子同心处进行摄动，采用Runge－Kuta积分法及迭代过程求解摄动方程，建立起水轮机阶梯式口环水封的转子动力特性系数的计算方法，为水轮发电机组轴系的动力学分析提供了必要的理论基础。

Newton-Raphson iteration is used to solve the set of linear algebra equations.

隐式格式采用Newton-Raphson法迭代求解。

In this method we considerately consider the non-linear distortion of the scene and system error in the camera model, and introduce the non-linear distortion of the lens and system error into the direct-linear calibration algorithm, and quickly realize the camera calibration through a simple linear iterative method.

该方法在摄像机模型中全面考虑了镜头的非线性畸变和系统误差，在直接线性标定法中引入了处理镜头非线性畸变和系统误差的因子，通过简单的迭代求解实现了对摄像机的快速定标。

Assuming the independence (or the weak-correlation) between the reflectivity and wavelet, the optimal estimation equations for the wavelet and reflectivity were derived respectively. Furthermore, pre-conditional conjugate gradient algorithm iteration inversion was applied to realize the simultaneous estimation of reflectivity and wavelet.

基于反射系数与子波相互独立的假设，分别构建了反射系数和子波最优估计方程，并采用预条件共轭梯度法迭代反演实现反射系数和子波的同时估计。

This paper has proposed a method controlling iteration number and stability of solution according to thought of integral convergence algorithm minimizing nonlinear equations.

本文利用求非线性方程组极小化全局收敛法的思路，提出了控制迭代收敛次数、控制反演解稳定的方法。

Aimed at the problem of choosing the initial value when the Newton method is used to compute the controlling unstable equilibrium point, a practical and rigorous solving scheme was presented: by identifying the controlling load bus of the given fault, and using the Thevenin equivalent circuit to represent the rest of the system at the state of the post disturbance stable equilibrium point, using the steady equivalent circuit to represent the induction motor in composite load, and then using the torque characteristics of induction motor, a point near the CUEP is gained to be the initial value. The second order normal forms was used to approximate the stable manifold of CUEP, and the local approximating boundary of the region of attraction of the post disturbance stable equilibrium point was gained. Then just by simulating the state of the system at the fault clearing time, the transient voltage stability of the system could be determined.

针对采用牛顿法求取故障后系统主导不稳定平衡点(controlling unstable equilibrium point，CUEP)存在的初值选取难题，提出一种实用但不失严谨的解决方案：通过识别给定故障的主导负荷母线，对主导负荷母线以外系统由故障后稳定平衡点处的状态进行戴维南等值，对负荷中感应电动机部分采用其稳态等值电路，再由感应电动机的转矩特性求得CUEP附近的一个点作为近似的CUEP，以此为迭代初值可靠求得CUEP；采用二阶正规型来近似CUEP的稳定流形的方法求得近似的局部吸引域边界；由仿真得到故障清除时刻系统的状态并根据该状态是否位于吸引域内判断系统的暂态电压稳定性。

Fuzzy logic rules are used in expert judgement for obtaining the fuzzy Petri net, on which basis a model is built for evaluation of weapon equipment. Then artificial neural network is introduced into the Petri net. Steepest Descent Method is used for training the parameters of fuzzy Petri net model. As a result, the model has great learning capability and high adaptability to complicated environment.

将模糊逻辑规则应用到专家评判中得到模糊Petri网，建立基于模糊Petri网的武器装备效能评估模型，并在此基础上将人工神经网络引入到模糊Petri中，在模糊Petri模型上，用迭代最速下降法对模型的参数进行学习和训练，经过学习和训练的模型具有很强的学习能力以及对外界环境的自适应能力。

Fractal is a subdiscipline of nonlinear area, researches on fractal characteristics of the deoxyribonucleic acid sequence may reveal some secret hidden in the DNA sequence during the process of biological evolution. Chaos Game Representation was proposed as a scale-independent representation for genomic sequences by Jeffrey in 1990. This technique, based on iteration function system, represents the word distribution statistics in DNA sequence as the fractal graphic. Therefore, we can get the distribution of sequence through analysis of fractal theory.

分形是非线性领域的一门分支学科，关于脱氧核糖核酸序列分形特征的研究，可以揭示生物在进化过程中隐藏在DNA序列中的某些秘密。1990年Jeffrey提出了基因组序列的与尺度无关的混沌游戏表示法，这是基于迭代函数系统的一种方法，它将DNA序列中一定长度字的分布规律表现为图形的分形特征，进而通过分形分析就可获取序列的分布规律，从而也成为DNA序列分析的一种统计方法。

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。