Abstract: An inflatable folding tunnel reinforcement structure and a construction method thereof are provided. The inflatable folding tunnel reinforcement structure includes an inflation port, an airbag, a water blocking net, a steel plate, a scissor folding mechanism, a vertical support plate, an arc-shaped support plate, drainage channels, an upper support rod, a lower support rod, a locking pin, a threaded steel rod, a rolling connection pin, and an induction motor, where the upper support rod and the lower support rod are unfolded in opposite directions to a preset position through the steel rod; and the drainage channels are configured to perform water guidance and resistance for a leakage-proofing purpose. The construction method includes: preparation before construction, device fixation, on-site construction, structural inspection, and site cleaning.

Abstract: A road structure reconstructed from large-scale independent underground garage and a construction method, which solves the problem of a newly constructed urban expressway passing through large underground space. The technical point is a construction method for the road structure reconstructed from large-scale independent underground garage, including the following steps: S100: segmentation for the garage, S200: preparation before construction: the materials and equipment required for construction are transported to the site, and the construction site is cleaned, S300: reconstruction for the front section, S400: reconstruction for the middle section, S500: reconstruction for the rear section. The inventiveness of the present disclosure is the application of segmentation construction, the front section is completely obsoleted, a transition section is provided at the middle, and the design of the rear section adopts a double-deck road, thus the original underground garage structure is fully utilized.

Abstract: An inflatable folding tunnel reinforcement structure and a construction method thereof are provided. The inflatable folding tunnel reinforcement structure includes an inflation port, an airbag, a water blocking net, a steel plate, a scissor folding mechanism, a vertical support plate, an arc-shaped support plate, drainage channels, an upper support rod, a lower support rod, a locking pin, a threaded steel rod, a rolling connection pin, and an induction motor, where the upper support rod and the lower support rod are unfolded in opposite directions to a preset position through the steel rod; and the drainage channels are configured to perform water guidance and resistance for a leakage-proofing purpose. The construction method includes: preparation before construction, device fixation, on-site construction, structural inspection, and site cleaning. The present disclosure can treat various tunnel defects efficiently and conveniently and achieve a desired leakage-proofing effect.

Abstract: Managing categories in an electronic commerce system, includes obtaining transaction information pertaining to a set of back-end categories, the transaction information includes user information of users in the system who completed transactions in the set of back-end categories during a preset period, determining, based on the user information, a set of front-end categories that were selected by users in the system during the preset period, determining number of times a front-end category in the set of front-end categories was selected by the users in the system during the preset period, and adjusting the front-end category according to the transaction information and the number of times the front-end category was selected during the preset period.

Abstract: Managing categories in an electronic commerce system, includes obtaining transaction information pertaining to a set of back-end categories, the transaction information includes user information of users in the system who completed transactions in the set of back-end categories during a preset period, determining, based on the user information, a set of front-end categories that were selected by users in the system during the preset period, determining number of times a front-end category in the set of front-end categories was selected by the users in the system during the preset period, and adjusting the front-end category according to the transaction information and the number of times the front-end category was selected during the preset period.