随笔分类 - Python
摘要：import numpy as np import matplotlib.pyplot as plt from scipy.interpolate import CubicSpline # 样本数据点(4.0,4.2)，(4.3,5.7)，(4.6,6,6)，(5.3,4.8)，(5.9,4,6)
阅读全文
摘要：import os import urllib.request import zipfile from pprint import pprint import numpy as np import tensorflow as tf import keras as k def set_session(
阅读全文
摘要：#Tensofrlow #假设我们有一个任务是从图像中预测物体的位置（x坐标和y坐标）和物体的类别。这个任务有三个目标标签：x坐标、y坐标和类别。 import numpy as np import tensorflow as tf from tensorflow import keras from
阅读全文
摘要：# python多线程 # 多线程 threading，利用CPU和IO可以同时执行的原理 # 多进程 multiprocessing，利用多核CPU的能力，真正的并行执行任务 # 异步IO asyncio，在单线程利用CPU和IO同时执行的原理，实现函数异步执行 * 使用Lock对资源加锁，防止冲
阅读全文
摘要：import torch from torch import nn from torch.nn import functional as F from d2l import torch as d2l class Inception(nn.Module): # c1-c4是每条路径的输出通道数 def
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l def nin_block(in_channels,out_channels,kernel_size,strides,padding): return nn.Sequenti
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l def vgg_block(num_convs,in_channels,out_channels): layers = [] for _ in range(num_convs
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l net = nn.Sequential( # (224-11+1+2)/4=54 nn.Conv2d(1,96,kernel_size=11,stride=4,padding
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l class Reshape(torch.nn.Module): def forward(self,x): # 批量大小默认，输出通道为1 return x.view(-1,1
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l # 实现池化层的正向传播 def pool2d(x,pool_size,mode='max'): # 获取窗口大小 p_h,p_w=pool_size # 获取偏移量 y=t
阅读全文
摘要：import torch from d2l import torch as d2l from torch import nn # 多输入通道互相关运算 def corr2d_multi_in(x,k): # zip对每个通道配对,返回一个可迭代对象,其中每个元素是一个(x,k)元组,表示一个输入通道
阅读全文
摘要：import torch from torch import nn def comp_conv2d(conv2d,x): # 在维度前面加上通道数和批量大小数1 x=x.reshape((1,1)+x.shape) # 得到4维 y=conv2d(x) # 把前面两维去掉 return y.resh
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l def corr2d(x,k): """计算二维互相关运算""" # 获取卷积核的高和宽 h,w=k.shape # 输出的高和宽 y=torch.zeros((x.shap
阅读全文
摘要：import os os.environ['KMP_DUPLICATE_LIB_OK']='True' import hashlib import tarfile import zipfile import requests import numpy as np import pandas as p
阅读全文
摘要：# 深度学习基础-李沐课程跟学 ## 基础知识 * 深度学习与经典方法的区别主要在于：前者关注功能强大的模型，这些模型有神经网络错综复杂的交织在一起，包含层层数据转换，因此被成为深度学习。 * 所谓“学习”是指模型自主提高完成某些任务的性能。在机器学习中，我们需要定义对模型的优劣程度的度量，这个度量
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l def dropout_layer(x,dropout): assert 0<= dropout <=1 if dropout ==1: return torch.zeros
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l # 将数据做的很小，这样容易实现过拟合 n_train, n_test, num_inputs, batch_size = 20, 100, 200, 5 true_w, t
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l batch_size = 256 train_iter, test_iter = d2l.load_data_fashion_mnist(batch_size) num_in
阅读全文
摘要：import torch from torch import nn from d2l import torch as d2l batch_size = 256 train_iter, test_iter = d2l.load_data_fashion_mnist(batch_size) # PyTo
阅读全文
摘要：import torch from IPython import display from d2l import torch as d2l # from d2l.mxnet import Accumulator batch_size = 256 # 每次读256张图片,返回训练iter和测试iter
阅读全文
