convergence line

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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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 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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Based on the conventional data of a actual case of squall line and inserted certain intensity PBL convergence line, numerical trial of motivation of squall line of PBL convergence line type is made by using improved high resolution ETA model.

利用高分辨率η坐标模式，以一个实际飑线个例的常规资料为初值，通过嵌入一定强度的边界中层尺度辐合线，进行了边界层辐合线型飑线激发的数值试验。

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For the 4.28 process, the mesoscale convergence line, which is formed by downslope wind from the Taihang mountains converging with the southwest warm humid wind, releases the Convective Available Potential Energy, initiates the convection and organizes the convective cells into squall line.

4.28过程由于太行山地形影响而产生的下坡风与西南暖湿气流相汇合，形成中尺度辐合线，触发了不稳定能量的释放，产生对流并由中尺度辐合线组织成飑线。

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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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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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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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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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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 analysis indicates that the stable easterly stream provided by the second quadrant of the outside of the typhoon and its disturbance constitute the mesoscale easterly stream convergence line synoptic system which results in heavy rain.

经综合分析表明：暴雨期间，在台风外围第二象限稳定的东风气流，并发生扰动，构成产生特大暴雨的中尺度东风辐合线天气系统。

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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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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 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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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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