The invention provides a
search engine-based standard substance and standard substance retrieval and sorting method, which relates to the technical field of
data processing, and comprises the following steps: acquiring retrieval keywords input by a user, constructing a standard substance and standard substance
knowledge base, mapping to a low-dimensional
semantic space, calculating the semantic correlation between the retrieval keywords and the standard substance knowledge, and constructing a
heterogeneous information network. Generating comprehensive relevancy measurement, and performing multi-
granularity semantic matching to obtain candidate retrieval results; for structural features corresponding to the candidate retrieval results, adaptive feature weights are distributed, independent clustering is carried out,
subspace clustering results are obtained, optimization is carried out,
global optimal clustering results are obtained, high-order
semantic association features are mined, cross-category
semantic association is carried out, and high-quality retrieval results are generated; performing low-rank
decomposition to obtain an initial comprehensive
score, modeling a
sorting problem as a Markov
decision process, determining an action space and a
state space, constructing a reward function, determining a sorting position, and obtaining an optimal sorting result.