L20 梯度下降、随机梯度下降和小批量梯度下降

airfoil4755 下载 链接:https://pan.baidu.com/s/1YEtNjJ0_G9eeH6A6vHXhnA 提取码:dwjq 梯度下降 (Boyd & Vandenberghe, 2004) %matplotlib inline import numpy as np import torch import time from torch import nn, optim import math import sys sys.path.append('/home/kesci/input') import d2lzh1981 as d2l 一维梯度下降 证明:沿梯度反方向