Abstract: The present invention discloses a biodegradable molybdenum-based flow diverter and a preparation method thereof, wherein the preparation method comprises the following steps: step 1. pretreatment of a molybdenum wire: cleaning and drying the molybdenum wire, and then weaving to obtain the molybdenum-based flow diverter; step 2. performing heat treatment on the molybdenum-based flow diverter in the step 1; and step 3. performing surface chemical polishing treatment on the molybdenum-based flow diverter subjected to the heat treatment in the step 2. The present invention solves the technical problem that the flow diverter in the prior art cannot be degraded in vivo and therefore easily causing various complications. It provides also improved mechanical property, MRI magnetic resonance imaging (MRI) compatibility as well as biocompatibility, and particularly has the function of promoting rapid endothelialization, compared with other degradable materials.

Abstract: The present disclosure provides a method and a device for advertisement classification, a server and a storage medium in the field of information technologies. The method includes: obtaining, according to text information of an advertisement to be classified, a plurality of feature words of the text information; acquiring a Term Frequency-Inverse Document Frequency value of each feature word from the plurality of feature words as a weight value of the feature word, according to statistical information of the feature word in the text information and statistical information of the feature word in known product titles; and acquiring a category of the advertisement according to the weight values of the plurality of feature words, classification information of the advertisement and a preset classification model. Accordingly, selecting the data from the advertisement in a manner of manual labeling is avoided, so that the time taken for advertisement classification is reduced.