The invention provides a method and a
system for identifying and cleaning abnormal data, which relate to the technical field of
data processing, and are used for identifying and cleaning abnormal data by acquiring real-
time data flow, determining a self-adaptive threshold value by using a trained
Gaussian mixture model and detecting abnormal data points. A
deep belief network and long and
short term memory network composite model is adopted to carry out deep
feature learning and anomaly
verification, and high-level feature representation and anomaly degree quantitative evaluation results are obtained; and evaluating a conditional dependency relationship among the abnormal data points by using the probability
graph model, constructing a target probability
dependency graph, and generating an abnormal
data point recognition result. Based on an identification result, a reward mechanism excitation
algorithm is applied to optimize a cleaning strategy; according to the method, the to-be-determined abnormal region is identified, the multi-
modal fusion technology is introduced to perform
correlation analysis, and the data in the to-be-determined abnormal region is judged and cleaned based on the analysis result to obtain the target cleaning strategy, so that the abnormal
data identification and cleaning efficiency and accuracy are improved, and the method has relatively high adaptive capability and expansibility.