次梯度

Analysis and a numerical simulation study are carried out to investigate the effects of surface fluxes on the development of a long-lived severe squall line that occurred on 12 July 2004 near Shanghai using the RSM-RANAL re-analysis data and WRF model.

使用水平分辨率20km的RSM-RANAL再分析资料和WRF模式，对2004年7月12日影响上海地区的一次飑线过程进行分析和数值模拟，结果表明：(1)雷暴发生区域的西北侧约300km处有一冷锋，地面风场辐合；中低层为一致西南急流，雷暴发生区域上空300h Pa位于西风急流右后侧辐散区中；地面存在明显的温度梯度。

First, orthogonal circle operator was modeled in terms of Zernike orthogonal complex moment; the one-to-one mapping between the edge point and the parameters of the circle was established by the algorithm. Then, quadratic polynomial interpolation was adopted to further locate the edge points in the gradient direction.

首先根据Zernike正交复数矩建立圆物体边缘点与边缘参数之间的映射关系，并提取边缘点；然后利用二次多项式插值在梯度方向上对提取出的边缘点进行进一步定位；最后利用最小二乘法拟合插值后的边缘点，得到亚像素精度的圆参数。

The status of gradient projection method of redundant manipulator is analysed, the effect and selection methods of the scale factor of the homogeneous solution is expatiated.

分析了冗余度机器人梯度投影法的研究现状，阐述了齐次解的比例因子的作用及其选择方法，提出了一种实时连续变化的比例因子计算方法。

Since the gradient projection method was proposed, it has been paid much attention to because it has the following three advantages: 1 its structure is very simple, 2 it is easily operated, 3 its each computional step is iterated explictly and doesn't need to solve complex linear programming or quadratic programming problems.

梯度投影方法自提出以来，由于它简单易行，计算的每一步都是显式迭代，而不必去解复杂的线性规划或二次规划问题，因此颇为人们注意。

This method takes the advantages of fast convergence of CG and not easily to trap the local extreme of SH, which make it can converge to global extreme at a high rate of speed in solving the problems of quadratic function optimization.

这种方法结合了共轭梯度法的快速收敛和随机爬山法的全局收敛的优点，在求解二次函数极值的问题上具有收敛速度快，并能收敛到全局极值的特点。

According to the distribution of the radial gradient of vertical vorticity component of hurricane, which is calculated with high resolution output from one explicit numerical simulation of a hurricane case, this kind of wave mainly emerges in eye and eyewall.

利用一次飓风过程的精确数值模拟所输出高分辨的资料，计算了飓风中径向涡度梯度的分布，指出这类波动主要存在于眼墙和眼心中。

First of all, on the base of the reduced gradient method of Wolfe, we added accurate one dimension searching method into it and gained a new algorithm (algorithm 1,2) for the nonlinear programming with linear equality constraints and quadratic programming problems, and proved convergence of algorithm, then, we use above algo...

首先本文在Wolfe既约梯度法的基础上，针对具有线性等式约束的非线性规划问题和二次规划问题，引入了精确的一维搜索，得到了带一维搜索的新算法(算法1、2)，并给出了算法的收敛性证明。

This updating rule for penalty parameters only require a few iterations in solving each subproblem and the gradient of the barrier function does not need to satisfy strict conditions.

这一惩罚参数的校正规则保证在求解子问题时只迭代少数的几次，而不需要障碍函数的梯度满足苛刻的条件。

Create a Linear Gradient with the first swatch at 60% black and the second at 90% black.

创建一个线性梯度与第一Swatch的60 ％黑色和第二次在90 ％黑色。

It is modelled as a coupled system of nonlinear partial differential equations with quadratic growth in the gradient of one of the unknowns.

这是一个在方程组中含有梯度为二次增长的非线性偏微分方程问题。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。