查询词典 convergence

FR conjugate gradient methods with perturbations are proposed. The global convergence property of the first method is proved under the condition of main directions' sufficient descent. Whereas, in the proof of the convergence for the other two methods, we only need main directions' descent. Importantly and quite interesting, boundedness conditions such as objective function being bounded below, boundedness of level set are not needed. Chapter 5 presents a version of Dai-Yuan conjugate gradient method with perturbations.

在主方向充分下降的条件下证明了第一个方法的全局收敛性，而后两个方法的收敛性是在主方向下降的条件下证明的，这些收敛性证明的一个共同特征就是不需要目标函数有下界或水平集有界等有界性条件，第5章采用Wolfe或Armijo步长规则提出了带扰动项的Dai-Yuanabbr。

Based on present work of genetic algorithms, the arising process of incest and premature convergence is discussed. The operating efficiency of genetic algorithms is analyzed from different view of points, and the conclusion is drawn from the analysis that there exists a lot of caducous operation during the evolution in the case of premature convergence.

在遗传算法现有研究成果的基础上，讨论了近亲繁殖和早熟收敛的产生过程，并从不同角度对遗传算法的操作效率进行了分析，得出在早熟收敛的情况下遗传操作存在大量无效操作的结论； 3。

However,authors still do not find the relevant references on convergence and symmetric problems of the semi-analytical solution.Based on the semi-analytical solution for Hamilton canonical equation theory,the formulations of the clamp and simply supported and symmetric boundary conditions on the Hamiltonian element are derived by the variational principle.Several numerical examples show that with increase of meshes,the convergence rate of the semi-analytical solution is faster than the convergent rate of traditional finite element method based on displacement.

①在厚度上没有任何位移和应力模式的假设，由于传递矩阵方法的引入，从理论上讲，不受板壳厚度或层合板壳层数的限制；②采用弹性力学的Hamilton正则方程半解析法，可以克服边界的局部化效应[8]；③由于在平面内或圆柱壳的曲面内采用了有限元法，所以一般的板壳问题不受结构侧面边界条件的限制，在复杂工程板壳问题上具有广泛的应用领域。

SIP modularity and SOC have important effects on 3C industry convergence. Modulization, industry convergence not only change the base of production structure but also the ...

模块化、产业融合不仅使生产结构基础改变了，竞争的基础也发生了转变，使企业之间的合作与竞争都达到了极致，这集中表现为企业之间的合作竞争，而企业之间的竞争又分为两个层面：设计规则的标准竞争和模块供应商之间激烈的"背对背"竞争。

Besides, as to inpainting problem in wavelet domain, we introduce a new iterative model. In this model low frequency and high frequency will carry on processing separately, enormous speed up the image repair convergence rate, and even if as high as 90% wavelet coefficient have been lost, this model will also be able to have the very good repair effect. In the old model, to compute the curvature we have to transform the coefficients to the pixel domain, and then transform back to the coefficient domain for several times and this method can solve this problem and speed up the iterative convergence.

其次针对小波域中图像修复的问题，本文提出了一种新的小波域图像修复模型，该模型根据小波变换后系数相关性的特点，将低频和高频分别进行处理，极大的加快了图像修复的收敛速度，并且即使丢失高达90%的小波系数，该模型也会有很好的修复效果，有效的解决了传统的TV- Wavelet模型在计算图像的平均曲率WCURV时，需要反复进行小波分解与重构的计算，迭代速度慢的问题。

With enough free-surface range and collocation point number, this paper discusses the effects of the two kinds of distances on the numerical convergence, proposes the expressions for the inner distance, and has obtained consistent and convergence results.

本文研究了潜水椭球和Wigley船型的兴波问题和绕射问题，计算了非线性的兴波阻力系数、纵向一阶波浪扰动力和二阶倍频波浪扰动力，以及兴波武汉理工大学博士学位论文波形和绕射波形。

The experimental results prove that the convergence speed of the proposed method is non-linear and the use of convergence points can lower the complicacy of process of iteration.

实验结果表明，改进后的高斯核均值漂移算法以超线性的速度收敛，收敛点的应用降低了收敛过程中的计算量。

Our results show that there is no obvious conditional convergence in china, that is, given the same level of human capital, market openness and other factors the economic provinces have demonstrated an unconspicuous growth convergence.

本文研究得出，中国地区间的经济增长，存在不明显的条件收敛的特征，即在具有相同的人力资本、市场开放度等结构特征的经济地区间不存在明显的增长收敛趋势，但是存在着很显著的"俱乐部收敛"特征，即按东中西划分的区域内部人均经济产出具有明显的聚集现象。

We prove that the economic growth mode will be nonlinear in a region restricted by Minimum Government Scale, conditional convergence and club convergence would be found and the regional gap would reduce the first, then enlarge and reduce in the last.

我们证明，存在最小政府规模的经济其增长是非线性的，经济收敛性在短期表现为条件收敛与俱乐部收敛的双重特征，并且地区差距的变化将呈现出缩小-扩大-再缩小的动态特征。

Further econometric analysis based on the neo-classical convergence framework on inter-provincial economic growth during the transition period reaches the conclusion of conditional convergence.

本文以新古典收敛模型为框架，对转型时期各省区的经济发展进行了计量分析，得出了条件收敛的结论。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。