查询词典 iteration method

On the basis of solute transport theory, the coal gangue eluviated in Xinqiu in Fuxin coal miming area was studied for the pollution of groundwater. The mechanism of coal gangue eluviated in the aquifer was analyzed. A coupled numerical model was developed with convection、sorption and dissolve、disintegration for simulating the leachate transport in groundwater. The model was discreted by using a Gelarkin finite-element method and a Picard iteration scheme, and the process of coal gangue leachate was presented, which predict the temporal and spatial distribution features of contaminant concentration. The result indicates that the contaminated plume is continually extended as time increases, and the vertical diffusion is more abvious.

以溶质运移理论为基础，针对阜新市新邱露天煤矿煤矸石淋滤液对地下水污染实际情况，分析了煤矸石渗滤液在含水层中运移的规律，在综合考虑对流扩散、吸附解吸、生物降解条件下建立了淋滤液在地下水中运移的耦合动力学数学模型，采用Galerkin有限元方法和Picard迭代法相结合对耦合模型进行了离散，模拟了淋溶液对地下水污染的动态过程，预测了污染浓度的时空分布特征，并结合实际观测数据进行对比。

Experiments show that each iteration can be completed in 30 seconds and that the peak memory demand is 585MB during the PageRank computation of 17 million Web Pages containing 280 million links,indicating that this method meets the deman...

实验表明1 700多万的网页2.8亿条链接，可以在30秒内完成一次迭代，内存需求峰值585MB，可以满足工程化应用的需求。

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。

Based on the principle of Hamilton, dividing the main blade, flexbeam and torque tube into several beam elements, the bearingless rotor is nonlinearly modeled in this paper through modal transformation. By Newton-Raphson iteration and temporal finite element method, the above nonlinear equations are solved.

将无轴承旋翼的主桨叶、柔性梁和套管3个部分各自离散成若干梁单元，并将桨叶运动的物理坐标转换为挥舞、摆振、扭转方向的模态坐标，根据Hamilton原理建立旋翼气弹分析的动力学模型。

The 2D integral equations are computed by an integrated iteration algorithm of modified successive approximation method and Aitken acceleration technique.

采用改进型逐次逼近解法和Aitken加速技术相结合的迭代算法计算二维积分方程。

In the optimization iteration, the levelset function values of nodes are considered as design variables. To computedifferences normally, the Heaviside function is handled for smoothing, theregularized Heaviside function is selected to avoid the oscillation inhomogenizations method, and the results can converge smoothly.

在优化迭代过程中，节点上的Level Set函数值被看作是设计变量，并且为了便于微分计算能够正常进行，对Heaviside函数及其导函数做了光滑化处理，选取了一种正则化的Heaviside函数，避免了均匀化方法中出现的振荡现象，可以平稳地收敛到最终结果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。