迭代过程

Fractal theory quantifies these phenomena mainly by ascertaining their fractal dimensions.Box-counting algorithm is the one most practical and also most frequently adopted method.The traditional box-counting algorithm is based on the grid document and has some serious shortcomings,such as the distortion of the image being enlarged,the trivialness of the process and the finite of the iterative degree,etc.The vector box counting algorithm developed in this paper takes vector document as the carrier and has three advantages.

传统的计盒算法是基于栅格文件的方法，由于其存在图像放大后失真、过程繁琐和迭代次数有限等缺陷，因此为了准确简单方便地进行分维计算，开发了一种以矢量文件为载体的矢量计盒算法，并详细阐述了这种算法的数据结构、处理流程和主要函数，同时以Koch曲线、骨肿瘤边界及水系证明了矢量计盒算法的准确性和优越性。

Based on volume model for the tuffaceous sands, educed the contentof shaly and tuffaceous parts with the optimization methods for logging interpretation, in theprocess of which the calculative method was changed, so that iterative speed was accelerated;Compared with the slice analysis, the result calculated had the similar value and trend.

在建立凝灰质砂岩体积模型的基础上，应用最优化测井解释方法求取地层中泥质及凝灰质成分的含量，求解过程中改进计算方法，加快了迭代速度；处理结果与薄片分析资料对比，各成分含量的数值和大小趋势基本相符。

Simulation experiments' data show that by using this methods it can precisely generate non Gaussian correlate random sequence with specified probability density and power spectrum,and reproduce verisimilarly the scatter coherent video signal of radar sea clutter containing both amplitude and phase.

其中迭代算法用来计算非线性变换过程中高斯序列相关性的变化，而随机向量法用来完成线性变换，仿真实验数据证明利用这种方法可精确地产生具有指定概率密度和功率谱的非高斯随机序列，逼真地复现既包含振幅又包含相位的雷达海杂波相干视频散射信号。

Among them, one of the most promising seems to be Simulation Annealing that aims to reach the optimization of an objective function by physically analogizing to an annealing process of malerial at high temperature. This involves in a transformation of optimization of a function in continuous domain into a combinatorial optimization in discrete domain, as well as the proper choice of various control parameters such as temperature, iterative number etc.

为此，目前主要采用三种基于随机搜索策略的鲁棒技术，其中模拟退火算法是最有希望的一种，该算法的核心思想是随机模拟物理上的物质退火过程，它主要涉及将连续域优化问题转换为离散的组合优化问题，以及合理地选择各种控制参数、迭代时间等。

In consideration of the effect of the moment on the axial rigidity of the reinforced beam,the theory and practice of main cable s configuration calculation of self-anchored suspension bridge were systemically introduced with the method of segmental catenaries.

基于分段悬链线法，介绍自锚式悬索桥主缆线形计算原理和步骤，考虑弯矩对加劲梁轴向刚度的影响，在迭代计算过程中，提出采用非线性规划方法，并与传统的影响矩阵法进行对比，计算结果表明，两者结果吻合，从而使借助大型通用优化软件对自锚式悬索桥主缆线形进行精确求解成为可能

And it will be released in the limited area of medium in the form of heat,which diffuses in accordance with the classical principle of heat transfer .

应用Matlab程序，对钻石内部和边界采用不同的差分迭代格式，计算模拟了其中的热传导过程。

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。

This process is iterated as required until a final performance or economic criterion has been met.

这个过程是迭代的要求，直到最后的表现或经济标准已经达到。

In contrast to conventional optimization algorithms whose iterates are computed and analyzed deterministically, randomized methods rely on stochastic processes and random number/vector generation as part of the algorithm and/or its analysis.

传统的最优化算法中迭代的计算和分析是确定的，与之相比，随机方法依靠随机过程和随机数字/向量的生成作为算法和算法分析的一部分。

Puncturing is one of the techniques often used in turbo coding, the characteristics of which were used to design a modified ARQ scheme.

本文从turbo迭代译码是一个动态系统状态转变过程的观点出发，提出了一个停止判据。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失