Abstract: The present disclosure relates to an organosilica membrane with a porous intermediate layer and a method for preparing the same. The method includes: treating carbon nanotubes with an acid, washing, and drying to obtain carboxylated carbon nanotubes (COOH-CNTs); adding water to the COOH-CNTs and a SiO2—ZrO2 sol, and mixing uniformly to obtain a COOH-CNTs/SiO2—ZrO2 sol; coating the COOH-CNTs/SiO2—ZrO2 sol onto a tubular ceramic support, and calcining to obtain a ceramic support with a porous intermediate layer; and coating an organosilica sol onto the ceramic support with the porous intermediate layer, and performing a heat treatment to form a separation layer, thereby obtaining the organosilica membrane.

Abstract: The present disclosure discloses a preparation method of an organosilica/ceramic composite membrane with a gradient pore structure. The preparation method comprises: (1) selecting a porous ceramic material as a membrane support layer; (2) gradually replacing a solvent with water to prepare zirconium colloidal sols with different particle sizes, and successively coating the prepared zirconium colloidal sols onto a ceramic support from large to small so as to form a membrane transition layer with a gradient pore structure; and (3) catalytically synthesizing an organosilica polymeric sol using hydrochloric acid, coating the prepared organosilica sol onto the preheated transition layer through ultrasonic thermal spraying to undergo heat treatment, so as to prepare the organosilica/ceramic composite membrane with the gradient pore structure. According to the present disclosure, the transition layer with the gradient pore structure is prepared by using the zirconium colloidal sols with different particle sizes.

Abstract: A minutes determining method is provided. The method includes acquiring a to-be-used user record and a to-be-used record text; performing sentence segmentation processing on the to-be-used record text, to obtain at least one to-be-used sentence; performing semantic matching processing on the to-be-used user record and the at least one to-be-used sentence, to obtain a to-be-used semantic matching result; and determining to-be-used minutes content according to the to-be-used user record and the to-be-used semantic matching result.

Abstract: The present disclosure discloses a preparation method of an organosilica/ceramic composite membrane with a gradient pore structure. The preparation method comprises: (1) selecting a porous ceramic material as a membrane support layer; (2) gradually replacing a solvent with water to prepare zirconium colloidal sols with different particle sizes, and successively coating the prepared zirconium colloidal sols onto a ceramic support from large to small so as to form a membrane transition layer with a gradient pore structure; and (3) catalytically synthesizing an organosilica polymeric sol using hydrochloric acid, coating the prepared organosilica sol onto the preheated transition layer through ultrasonic thermal spraying to undergo heat treatment, so as to prepare the organosilica/ceramic composite membrane with the gradient pore structure. According to the present disclosure, the transition layer with the gradient pore structure is prepared by using the zirconium colloidal sols with different particle sizes.