convergence line

Global Convergence of a Class of Modified BFGS Algorithm with a New Line Search

改进的BFGS算法在一种新搜索下的收敛性

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The training samples were obtained through off-line numerical method with high precision. Using momentum technique, variable learning rate technique and conjugate gradient algorithm to accelerate the convergence speed of BP network.

通过离线的迭代算法生成高精度的样本点来训练神经网络，使用动量法、变学习率法和共轭梯度法提高BP网络的收敛速度。这一技术可以增加3dB带宽。

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The axes of low-layer helicity plus center is concurrent with shear line and the convergence line of surface inversion trough.

低层螺旋度大值中心轴线与切变线和地面倒槽辐合线走向一致，高层螺旋度与高空急流有关。

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Large-scale convergence theorem was proved under the condition that matrix M is irreducible diagonally dominant by Newton's method with line search.

文章在证明大范围收敛定理时，假设M是不可约对角优势矩阵，采用一维Newton寻查的方法，保证算法的收敛性。

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The large scale circulation situation, mesoscale convergence line and orographic action provided advantage condition rain.

在大尺度环流形势下, 中尺度辐合线和地形作用为局地大暴雨提供了有利条件.

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A mesoscale convergence line with some features of mini-cold front was a main system which caused the heavy rain.

发现一个具有微冷锋特徵的辐合线是造成这次暴雨的主要中系统。

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Surface Convergence Line and Precipitation Area Forecast of Heavy Convective

地面辐合线与强对流天气落区

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The large scale circulation situation, mesoscale convergence line and orographic action provided advantage condition for local large heavy rain.

在大尺度环流形势下，中尺度辐合线和地形作用为局地大暴雨提供了有利条件。

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Results show, it is the principle influencing systems that the upper trough, surface convergence line, The low level southwest jet and shear line.

分析结果表明，高空南支槽、地面辐合线、850hPa西南急流和切变线，是这次强对流天气过程的主要影响系统；

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The eastern rain-belts are closely related with low level flow convergence line.

相对多雨带与低层流场辐合线有很好的对应关系。

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Using Line-up Competition Algorithm ( LCA) to optimize the production sequence, simultaneously, a proper mutation strategy was proposed to improve the rate of convergence.

应用列队竞争算法对产品加工排序的组合优化问题进行了求解研究，确定出了较好的变异邻域策略，提高了收敛速率。

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The three-dimensional wind of the heavy rain were retrieved by MUSCAT ( multiple-Doppler synthesis and continuity adjustment technique) using the dual-Doppler radar volume scan data. It showed that the convergence line and the meso-cyclone at the low level play an important role in this heavy rain event.

使用MUSCAT技术对这次特大暴雨进行了双多普勒雷达三维风场反演，研究表明，中低层辐合线和中尺度气旋是造成此次暴雨的重要原因；

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It comes on with some mesoscale system, such as mesoscale convergence line wind shear, gale area and so on.

强对流天气在速度场上表现为中尺度辐合线、风向风速辐合区、风速辐合区、大风区等中尺度系统。

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