Abstract: A dual-layer membrane and a method for preparing thereof. By adding a modifying monomer containing an active group and a characteristic group to a dope solution or spinning solution during the preparation of the dual-layer membrane, the grafting reaction occurs between the active group of the monomer and the polymer in the dope solution or spinning solution, and the intermolecular interaction with other polymers is enhanced by the characteristic group of the monomer, to improve the miscibility between the polymers. The method is suitable for preparing both a dual-layer flat sheet membrane and a dual-layer hollow fiber membrane, and can realize the preparation of a dual-layer membrane with an interpenetrated structure at the interface under mild preparation conditions.

Abstract: A dual-layer membrane and a method for preparing thereof. By adding a modifying monomer containing an active group and a characteristic group to a dope solution or spinning solution during the preparation of the dual-layer membrane, the grafting reaction occurs between the active group of the monomer and the polymer in the dope solution or spinning solution, and the intermolecular interaction with other polymers is enhanced by the characteristic group of the monomer, to improve the miscibility between the polymers. The method is suitable for preparing both a dual-layer flat sheet membrane and a dual-layer hollow fiber membrane, and can realize the preparation of a dual-layer membrane with an interpenetrated structure at the interface under mild preparation conditions.

Abstract: Provided are a method and an apparatus for processing a video image. The method for processing a video image comprises: acquiring information of a current video; intercepting key images of the current video according to the information of the current video, each key image comprising a video frame image with a complete subtitle; sequencing the key images to generate an image library; and receiving a playing request, and according to the playing request, reading, from the image library, corresponding key images for playing.

Abstract: Provided are a method and an apparatus for processing a video image. The method for processing a video image comprises: acquiring information of a current video; intercepting key images of the current video according to the information of the current video, each key image comprising a video frame image with a complete subtitle; sequencing the key images to generate an image library; and receiving a playing request, and according to the playing request, reading, from the image library, corresponding key images for playing.