查询词典 gradient method

A high-performance liquid chromatographic method for the simultaneous separation and determination of aryltetralin lignans and flavonoids in Podophyllum emodi Wall.var. chinesis Sprague was developed. The separation was performed on a Kromasil-C 18 column by gradient elution with phosphate buffer-methanol (0-13min, 50∶50, 33min, 30∶70) as mobile phase at a flow-rate of 0.8 ml/min, with detection 270nm.

首次建立了桃儿七中苦鬼臼葡萄糖甙、4-去甲基鬼臼脂素、表鬼臼脂素、苦鬼臼脂素、苦鬼臼酯酮、鬼臼脂素、鬼臼酯酮、去氧鬼臼脂素、去氢鬼臼脂素等9种木脂素以及山柰酚、槲皮素等2种黄酮类组分同时分离测定的高效液相方法。

A novel three-dimensional localization method is proposed. Firstly, the tomato effective centric spots are obtained from the left multi-sensor fusion image and the right multi-sensor fusion image. Then, being looked as symmetries, image pairs other point to point correspondences are searched from two directions by pixel neighbor area correlation values by using the polar line restraint, the unique restraint and the disparity gradient restraint.

即从双目定位的几何模型出发，在双目匹配搜索中，提取多源传感融合图像的番茄凸壳有效形心点，采用极线约束、唯一性约束进行立体视觉图像的特征点及其邻域灰度相关的双向匹配，利用体视原理获取唯一被测目标的空间坐标。

Analysis of the feature and geometry of the normal compaction trend is used to establish the compaction trend with polynomial of degree 2 or 3 or polygonal line, and to predict the distribution of geopressure using the method of seismic transit time deviation -pore pressure gradient in Yinggehai bas.

研究了压力预测的方法，推导地震声波时差差值—压力梯度法的计算公式并指出它的优点是能够充分利用已知的钻井实测压力资料；从理论上分析了正常压实趋势线的性质和形态，并用2~3次多项式和分段函数建立正常压实趋势线；根据莺歌海盆地高温高压及沉积速率高、泥底辟发育的特征，建立合理的压实趋势线，并用声波时差差值—压力梯度法预测了莺歌海盆地的压力分布。

High-phase order power transmission is an important method to increase the power density because it can obviously decrease the surface potential gradient of the transmission conductor.

多相输电能够明显地降低导线表面的电位梯度，是提高输送功率密度的重要方法。

ABSTRACT Multi-phase power transmission is an important method to increase the power density transmitted, because the potential gradient of the transmission conductor surface can be obviously decreased.

多相输电能够明显地降低导线表面的电位梯度，是提高输送功率密度的重要方法。

Taking water as an example, the pressure gradient was numerically calculated by finite difference method.

采用有限差分法对水在内管做行星运动的环空中流动的压力梯度进行了数值计算。

The gradient projection method is a class of effective algorithms for constrained optimization problem,and it has an important position in optimization.

梯度投影法是一类有效的约束最优化算法，在最优化领域中占有重要的地位。

Best [25] appears to be the first to suggest the use of Rosen's gradient projection method [154] for optimal structural design.

最好[25]看来是建议使用的第一个Rosen's梯度投影法[154]优选的结构设计的。

Some convergence results of the gradient projection method under milder conditions are obtained.

进一步给出了目标函数f是凸函数和拟凸函数时的更强的收敛性结果。

Best [25] appears to be the first to suggest the use of Rosen′s gradient projection method [154] for optimal structural deign.

最好 [25] 似乎是第一建议 Rosen ′ s 倾斜度发射方法的使用 [154] 为最佳的结构蒙。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。