A Novel Stress State Assessment Method for College Students Based on EEG

Algorithm 1

LW-ELM algorithm.

	Input: Training set X1, test set X2
	Output: Weight
	Step 1: Calculate the number of samples in each category in X1
	Step 2: Create the initial expectation matrix T
	Step 3: For xi in X1
	Step 4: Determine the corresponding tij in T
	Step 5: Calculate tij according to the above formula
	Step 6: Generate hidden layer parameters at random
	Step 7: Using the hidden layer parameters and the training set X1, compute the hidden layer output matrix H
	Step 8: Calculate the output weight of the weighted extreme learning machine by equation (4)