The invention belongs to the technical field of
artificial intelligence education, and relates to an intelligent teaching assistance method and
system based on a large
language model. The method comprises the steps that text data,
voice data and
eye movement track data of students are acquired,
feature extraction is carried out, and a three-dimensional cognitive state
tensor model is constructed; constructing a cognitive state
tensor decomposition constraint optimization function, performing
tensor decomposition, and outputting a core tensor and a
factor matrix; generating a teaching strategy, and defining a cross-
modal kernel function to realize feature association;
tensor decomposition parameters are dynamically adjusted; and outputting the updated teaching strategy. According to the method, the cognitive change trajectory of a learner can be captured from multiple dimensions, and the accuracy and comprehensiveness of cognitive state characterization are remarkably improved through a cross-
modal kernel function and a gradient
coupling mechanism; constructing a cognitive state
tensor decomposition constraint optimization function to describe an evolution law of a cognitive state, and capturing a continuous change characteristic of the cognitive state along with time through a dynamic constraint condition of a
time factor matrix.