importnumpyasnp # ... code from previous section here classOurNeuralNetwork: ''' A neural network with: - 2 inputs - a hidden layer with 2 neurons (h1, h2) - an output layer with 1 neuron (o1) Each neuron has the same weights and bias: - ...
import operator import time def createData(dim = 200, cnoise = 0.2): ''' 生成数据集 ''' x, y = sklearn.datasets.make_moons(dim, noise = cnoise) plt.scatter(x[:,0], x[:,1], s = 40, c=y, cmap=plt.cm.Spectral) return x,y def initSuperParameter(x): ''' 初始化超参数 ...
importnumpyasnp # ... code from previous section here classOurNeuralNetwork: ''' A neural network with: - 2 inputs - a hidden layer with 2 neurons (h1, h2) - an output layer with 1 neuron (o1) Each neuron has the same weights and bias: - w = [0, 1] - b = 0 ''' def_...
importnumpyasnp # ... code from previous section here classOurNeuralNetwork: ''' A neural network with: - 2 inputs - a hidden layer with 2 neurons (h1, h2) - an output layer with 1 neuron (o1) Each neuron has the same weights and bias: - w = [0, 1] - b = 0 ''' def_...
这第一个部分是BP神经网络的建立 参数选取参照论文:基于数据挖掘技术的股价指数分析与预测研究_胡林林 importmathimportrandomimporttushare as tsimportpandas as pd random.seed(0)defgetData(id,start,end): df=ts.get_hist_data(id,start,end) DATA=pd.DataFrame(columns=['rate1','rate2','rate3','pos...
code from previous section here class OurNeuralNetwork: ''' A neural network with: - 2 inputs - a hidden layer with 2 neurons (h1, h2) - an output layer with 1 neuron (o1) Each neuron has the same weights and bias: - w = [0, 1] - b = 0 ''' def __init__(self): weigh...
This tutorial will run through the coding up of a simpleneural network(NN) in Python. We’re not going to use any fancy packages (though they obviously have their advantages in tools, speed, efficiency…) we’re only going to use numpy!
# ... code from previous section here class OurNeuralNetwork: ''' A neural network with: - 2 inputs - a hidden layer with 2 neurons (h1, h2) - an output layer with 1 neuron (o1) Each neuron has the same weights and bias: ...
In this step-by-step tutorial, you'll build a neural network from scratch as an introduction to the world of artificial intelligence (AI) in Python. You'll learn how to train your neural network and make accurate predictions based on a given dataset.
https://medium.com/technology-invention-and-more/how-to-build-a-simple-neural-network-in-9-lines-of-python-code-cc8f23647ca1 什么是神经网络?人类有1000亿个被称为神经元的细胞,它们之间通过轴突连接。连接到某个神经元的轴突中,如果有足够多数量被触发,则这个神经元就会被触发。我们把这个过程称为“思...