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What are Artificial Neural Networks
Backpropagation and Forwardpropagation
Structure of a Neural Network (Neuron)
Input feature Weight Vector, Sum Function, Activation Function, and Bias in the network
Defining an activation function and understanding different types of activation function
Back Propagation NN is the multilayered feedforward NN
Steps in backpropagation algorithm, defining weights forward feeding to get output, and error backpropagation
Defining a function for Initializing the network
Calculating the neuron activation for an input
Defining the Transfer function for neuron activation
Defining function for forwarding propagate input to a network output
Testing the forward propagation
Calculating the derivative of a neuron output
Backpropagating the error and storing it in neurons
Updating the network weights with calculated error
Training the network with some iterations
Importing the final dataset for testing created algorithm
Preprocessing the dataset and scaling it for better results
Feeding the dataset into Artificial Neural Networks and calculating the results
Applying crossvalidation to prevent overfitting
Making the final predictions and calculating the accuracy score
From the perspective of risk management, the result of predictive accuracy of the estimated probability of default will be more valuable than the binary result of classification  credible or not credible clients. Because the real probability of default is unknown, so in this machine learning project we present the novel Sorting Smoothing Method to estimate the real probability of default.
With the real probability of default as the response variable (Y), and the predictive probability of default as the independent variable (X), the simple linear regression result (Y = A + BX) shows that the forecasting model produced by artificial neural network has the highest coefficient of determination; its regression intercept (A) is close to zero, and regression coefficient (B) to one. Therefore, among the six data mining techniques, artificial neural network is the only one that can accurately estimate the real probability of default.