下降梯度 meaning in English
descent gradient
downward gradient
Examples
- 2 ) the variation of pgv and pgd with depth is similar to that of pga . besides , the decrement with depth of pgv is smaller than that of pga . and pgd smaller than pgv
2 .地震动峰值速度( pgv )和峰值位移( pgd ) : pgv和pgd沿深度的变化特点与pga相似;只是pgv沿深度的下降梯度小于pga ，且pgd沿深度的变化梯度小于pgv 。 - In this part , pga , pgv and pgd are studied , the main results are as follows : 1 ) in general , pga decrease with depth and can reach maximum at surface ; the pga ratio with depth of downhole / surface is affected by magnitude and ground pga value , the bigger the magnitude and pga value , the smaller the pga decrement with depth ; the decrement with depth is much more significant in near - surface than that in deep downhole
加速度峰值沿深度的变化与地震的大小和场地条件有关。对于土层场地，一般说来，随着震级和地表pga的增大，加速度峰值沿深度的下降梯度减小。对于“土层基岩”型场地，基岩面处的水平分量约是地表的1 3 . 7 ，竖向分量约是地表的1 3 . 2 。 - 2 ) fourier amplitude spectrum analysis : ( 1 ) the fourier amplitude spectra decrease with the increment of depth ; and the components of fourier spectrum become complex in near - surface . ( 2 ) the fourier amplitude decrease faster in shallow soil level , and smaller in deep soil level . ( 3 ) compared with the deepest bedrock fourier spectrum , spectral components of higher than 5 hz decrease with depth decrease
2 .地震动傅立叶振幅谱沿深度的变化规律( d随着深度的增大，傅氏谱振幅逐渐减小;越接近地表傅氏谱的频谱成份越多，形状越复杂;傅氏谱振幅值在浅层沿深度的下降梯度较大，在深层下降较小; “土层/基岩”场地的基岩内_匕下两测点的地震动频谱沿深度几乎不变，傅氏谱十分相似; d基岩以上的土层测点，高于shz的高频成分减少。 - The training object of the algorithm is minimization of the cost function in optimal control , variations of the weight values are obtained by the steepest descend gradient method and moreover an approximate treatment is made on the sensitivity matrix evaluation
本方法以瞬间最优控制价值函数最小化为训练目标，考虑了地震输入的能量，利用最速下降梯度法计算权值的改变量，并对敏感度矩阵进行近似处理，可解决神经网络控制中神经网络控制器难以获得的训练输入输出样本对的难题。