The TBCs structure has been developed from the conventional two layer structure to a gradient structure, which provided much better thermal cycle life than the former one. 热障涂层的结构已由经典的双层结构向成分、结构连续变化的梯度结构发展,涂层的寿命有明显的提高。
Another idea is to replace central difference gradient by morphological gradient in diffusion coefficient discretization, the latter applying in anisotropic diffusion can enhance one-pixel line feature in noisy image while the former can not process efficiently. 另外在扩散方程离散化中,用形态算子梯度代替中心差商梯度,对于图像中的单像素点的线条,前者不能增强而后者则能有效地增强。
There are two transitional layers with greater velocity gradient at the depths of 370-440 km and 600-740 km, the former one having the greater velocity gradient, and its corresponding epicentral distance is 19 °. 在370440公里、600740公里有两个速度梯度较大的过渡层,其中以370440公里的正速度梯度最大,与之相应的震中距为19°。
This paper makes an improvement of standard BP neural network, by using adaptive learning rate moment gradient decreased method, compared improved BP neural network with standard BP neural network, the former has the advantages of fast convergence and good accuracy. 采用自适应学习速率动量梯度下降法对标准BP神经网络进行改进,并将改进的BP神经网络和标准BP神经网络进行了比较,改进的BP神经网具有收敛快,精度高的特点。