Abstract: An indoline compound. Specifically disclosed is an application of a compound represented by formula (I) and pharmaceutically acceptable salts thereof in the preparation of drugs for treating related diseases.

Abstract: A projection device with a combined matrix optical lens and 3D printer is disclosed. The LED array includes multiple rows and columns of point light sources; the combined matrix optical lens includes a first and second matrix optical lenses, wherein the first matrix optical lens consists of the first lenses with the same arrangement and the same number as the point light source, the second matrix optical lens consists of the second lenses with the same arrangement and the same number as the point light source; the 385-405 nm ultraviolet light emitted by the point light source passes through the corresponding first lens and the corresponding second lens in turn and is projected to the LCD liquid crystal display. The device adopts the combined matrix optical lens, which improves the uniformity of the light spot, and it is helpful for the 3D printer to improve the printing success rate and efficiency.

Abstract: The present invention discloses an electric scooter. The electric scooter comprises a body substrate, a support rod, a front wheel, a rear wheel and a fold mechanism; the front wheel is an in-wheel motor, the body substrate can fold close to the support rod with the rear wheel by means of the fold mechanism; the support rod is internally provided with a controller which is connected with the in-wheel motor, the front wheel is rotated to trigger the controller, thus the controller controls the in-wheel motor to rotate; the support rod has a retractable rod body, and handlebars are foldable. According to the present invention, the electric scooter cannot only be folded to the greatest extent, which saves a space to the greatest extent after being folded and is easy to carry, it also can be half-folded to facilitate carrying by hands, and can generate a driving assistance to enable the body to slide further as well.

Abstract: The present invention discloses an electric scooter. The electric scooter comprises a body substrate, a support rod, a front wheel, a rear wheel and a fold mechanism; the front wheel is an in-wheel motor, the body substrate can fold close to the support rod with the rear wheel by means of the fold mechanism; the support rod is internally provided with a controller which is connected with the in-wheel motor, the front wheel is rotated to trigger the controller, thus the controller controls the in-wheel motor to rotate; the support rod has a retractable rod body, and handlebars are foldable. According to the present invention, the electric scooter cannot only be folded to the greatest extent, which saves a space to the greatest extent after being folded and is easy to carry, it also can be half-folded to facilitate carrying by hands, and can generate a driving assistance to enable the body to slide further as well.

Abstract: A method of refining the grain structure and improving the hardness and strength properties of a metal or metal alloy workpiece is disclosed. The workpiece is subjected to forces that corrugate and then straighten the workpiece. These steps are repeated until an ultrafine-grained product having improved hardness and strength is produced.

Abstract: A method of refining the grain structure and improving the hardness and strength properties of a metal or metal alloy workpiece is disclosed. The workpiece is subjected to forces that corrugate and then straighten the workpiece. These steps are repeated until an ultrafine-grained product having improved hardness and strength is produced.