Abstract: Disclosed are a power demand side speech interaction method and system. The method includes: obtaining original demand information, the original demand information including user's basic information, user demand information, and a user demand time; converting the original demand information into first information in text format; performing text statistical analysis based on an industry term on the first information in text format, to obtain second information; searching for corresponding user's actual information from a database according to the second information; outputting the user's actual information; searching for a corresponding forecasting model from the database, according to the second information and the user's basic information; calculating, according to a policy limit value of latest policy information in the database, a time for which the model corresponding to the user's basic information reaches the policy limit value; and transmitting an early warning message.

Abstract: The present disclosure provides a flow battery and a cell stack. The cell stack includes: a first end plate; a second end plate; and at least one cell module arranged between the first end plate and the second end plate. Each cell module includes a first flow channel end plate, a second flow channel end plate arranged opposite to the first flow channel end plate, and single-cell assemblies arranged between the first flow channel end plate and the second flow channel end plate. The single-cell assemblies include at least three hermetically-assembled cell assemblies, the first flow channel end plate is provided with arch-like flow channels, the second flow channel end plate is provided with arch-like flow channels, and each arch-like flow channel is provided with a flow channel aperture in communication with the at least three hermetically-assembled cell assemblies.

Abstract: The present disclosure provides a vanadium electrolyte, a preparation method and use thereof.

Abstract: Disclosed is an automatic welding apparatus using an inside steel tube, which includes a connecting seat and a fixing bracket. The fixing bracket is fixedly connected to a rear side of the connecting seat. a roller assembly is provided at one end of the fixing bracket, and a left side and a right side of the connecting seat are respectively fixedly connected with two first mounting brackets, between which a connecting shaft is rotatably connected. The connecting shaft is rotatably connected with a driving wheel, a signal transmission component is arranged on a periphery of the driving wheel, a laser welder is provided on an upper surface of the connecting seat, a laser welding head is provided at one end of the laser welder; and the laser welder is configured to start the laser welding head according to a signal transmitted by the signal transmission component.

Abstract: A device for transferring a cotton fiber includes a cotton-fiber support plate, a first cover plate, a saw blade roller, a licker-in roller, and a second cover plate. A spacing between the saw blade roller and the licker-in roller and an arc of the saw blade roller covered by the second cover plate are adjusted such that the number of rotations required for transferring the cotton fiber is N. A device for removing an impurity in a cotton fiber is also provided by further adding an impurity-removing plate and an air compensation port to the above transferring device.