迭代计算

And during the inversion, two constrained models, flattest and smoothest model, were incorporated into the sensitivity matrix calculated by theoretical formula.

在反演过程中，根据理论公式计算迭代过程中灵敏度矩阵，并采用平坦模型和光滑模型两种约束。

The distributions of velocity, velocity gradient, shear stress, clongation stress, first normal stress difference and pressure of the flow of a power-law fluid in the profile die were analyzed. It indicates that for a power-law fluid only after a few iterations a good convergence can be reached, even though in the case of high extrusion velocity.

本文分析了幂律流体在异型材挤出口模内的速度分布、速度梯度分布、剪切应力分布、拉伸应力分布、第一法向应力差分布和压力场，研究表明采用幂律流体模型，即使在挤出速度非常大的情况下，经过有限次迭代，模拟计算都能够收敛，并得到合理的结果。

Simulation results show that the relative-effective error of bridge structure parameter identification is less than 10%, the application of Levenberg-Marquardt algorithm is feasible, its quantitative message can be put forward for bridge structure condition assessment.

对一连续粱的数值模拟计算表明，在Gauss-Newton法迭代发散的情况下，Levenberg—Marquardt法的识别结果相对误差在10％左右，Levenberg—Marquardt法基本能实现对真实结构参数的识别，为结构进一步的状态评估提供了结构模型最基本的量化信息。

Genetic Algorithm is restricted by actual system computing ability. Because of the limited number of population and iteration, the choice of initiation Population is a vital of fact, which directly influents the efficiency and the result of algorithm.

遗传算法受实际系统计算能力的限制，种群个体和迭代次数有限，因此初始种群的选择成为算法成败的一个至关重要的因素，直接影响到算法的寻优效率和效果。

From research,It is known that the flux of single-phase transformer would offset and exciting current of single-phase transformer would be distorted under DC current inrushing.

直流电流通过两个Y0连接的变压器中性点侵入电力系统，故针对三相三柱变压器直流入侵情况建立了直流入侵下的三相三柱变压器的电路模型和相应的方程，结合三柱磁路的麦克斯韦方程和非线性的B—H曲线方程，利用数字迭代法，在MATLAB环境下编程计算了三相三柱变压器直流入侵下的变压器励磁电流和谐波特征。

In order to reduce the computation complexity of the matrix-vector product and the iterative times in the process of matrix inversing, a new wavelet-like preconditioning operator based on the lifting scheme is used.

一种新的基于提升法的类小波变换预处理算子的使用，降低了矩阵向量积的计算复杂度和求逆过程中的迭代次数。

The traditional synthesis tools succeed is because of the high quality timing engine, which can compute the delay and area of the different implement style of the same logic function and help the synthesis engine to choose the most suitable circuit, deal with the timing borrow, register retiming, logic duplication, etc for the design engineers.

目前的迭代式方法将综合后的设计进行初步的布局，根据布局信息计算延时，然后用于指导综合工具进行综合修正。还有一部分厂商致力于提供统一的工艺信息数据库，使综合工具和布局布线工具使用相同的模型数据库，根据各个阶段提供的信息实时更新模型。

This new method mainly comprises three steps: firstly, normalize the point-gradient vectors and calculate the block-gradient vectors and the corresponding block-coherence; then detect the noisy areas to eliminate the side effect of noise diffusing; finally, re-estimate all block- gradient vectors based on iteration and transform the gradient field to orientation field.

提出了一种基于梯度的健壮的指纹方向场估计算法，新算法首先归一化点梯度向量并计算块梯度向量及相应的块一致性；然后估计噪声区域；最后采用基于迭代的方法，重新估计所有块梯度向量并将梯度向量场转化为方向场。

With the gradient-based re-estimation method, comparable recognition rate is achieved to that with Baum-Welch algorithm.

由于似然概率是模型参数的复杂函数，计算似然概率时尚且要借助前向概率的迭代方法，更何况其偏导数。

Based upon the force-bearing characteristics, the combined finite element model of beam elements, truss elements and cable elements is selected, and an incremental-iterative nonlinear finite element technique is developed to analyse the dynamic response of the long span hybrid spatial structure of cable-supported lattice shells.

本文根据新型大跨空间杂交结构―索承网壳结构的受力特点，选用梁元、杆元和索元的混合有限元模型，给出了一种有效的适用于该类结构的非线性动力响应的增量、迭代有限元计算方法。

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。