Abstract: A quick-assembly structure includes an inserting portion and an inserting port allowing the inserting portion to be inserted, where one of the inserting portion and the inserting port is provided on the chassis, and the other one is provided on the back frame. A locking block of the inserting portion is movably arranged relative to the inserting port; and in an assembled state, a bump of the inserting portion is inserted into the inserting port along with the inserting portion, the locking block is pushed by an elastic force of an elastic member of the inserting port to enter a locking position, and at the locking position, a locking end of the locking block enters the inserting port and abuts against an abutting surface of the bump so as to restrict the inserting portion from being pulled out in a direction opposite to an inserting direction thereof.

Abstract: A quick-assembly structure includes first inserting connection structures, where each of the first inserting connection structures includes an inserting and clamping member and a groove body; each of the groove bodies includes an inserting groove and a clamping groove which are in communication with each other, the corresponding inserting and clamping member is inserted into the inserting groove in a vertical direction and then horizontally slides into the clamping groove in a first direction; and the seat cushion is further provided with elastic buckles, the chassis includes a clamping connection surface, and when the inserting and clamping members slide to predetermined positions in the clamping grooves, the elastic buckles are clamped with the clamping connection surface of the chassis in an abutting manner so as to restrict the chassis from sliding relative to the seat cushion in a direction opposite to the first direction.

Abstract: A computer-implemented green product management system and method are proposed. The system comprises: a database, a restricted-substance management module and a carbon footprint module. The database is configured to store data required by the restricted-substance management module and the carbon footprint module. The restricted-substance management module comprises: a detection module, configured to detect restricted-substance containing condition of a raw material and all contacted auxiliary consumptive materials in a production process of a product, and a determination module, configured to determine, according to a restricted-substance related predetermined criterion, and based on a detection result of the detection module and data in the database, whether the product conforms to the restricted-substance related predetermined criterion.

Abstract: Methods of performing a reaming operation at a wellsite are disclosed. The method involves measuring surface drilling parameters (e.g., surface torque and surface weight on bit) from surface sensors positioned about a rig, measuring downhole drilling parameters (e.g., downhole weight on bit and downhole torque) from downhole sensors positioned about a downhole tool, generating weight on reamer from the measured surface weight on bit and the measured downhole weight on bit, generating frictional torque by detecting from the surface sensors when the drilling tool is in a rotating off bottom state and selecting a portion of the measured surface torque measured during the rotating off bottom state, generating torque on reamer from the frictional torque, the downhole torque parameters, and the surface torque parameters, and detecting reamer performance by monitoring changes in reamer performance metrics (e.g., reamer aggressiveness) including integrated torque on reamer with weight on reamer.