Abstract: The present application discloses a positive electrode active material satisfying the chemical formula LxNayMzCu?Fe?Mn?O2+??0.5?X? and a preparation method therefor, a sodium ion battery and an apparatus including such battery, wherein L is a doping element at alkali metal site, M is a doping element at transition metal site, and X is a doping element at oxygen site, 0?x<0.35, 0.65?y?1, 0<??0.3, 0<??0.5, 0<??0.5, ?0.03???0.03, 0???0.1, z+?+?+?=1, mx+y+nz+2?+3?+4?=2(2+?), m is the valence state of L, and n is the valence state of M; and the pH of the positive electrode active material is 10.5-13, wherein L is a doping element at alkali metal site, M is a doping element at transition metal site, and X is a doping element at oxygen site.

Abstract: Described herein is a technology for modifying hotspot objects in a user interface (UI). In one implementation, a view of a user interface is presented on a display by a hotspot manager. UI interaction including selection of a location in the view is received. A hotspot object associated to the selected location of the view may be modified based on the UI interaction when the hotspot manager is in an edit mode. The hotspot object contains information of the selected location. An updated content of the hotspot object may be presented in the edit mode, the updated content resulting from changes to an existing hotspot object or addition of a new hotspot object.

Abstract: Described herein is a technology for modifying hotspot objects in a user interface (UI). In one implementation, a view of a user interface is presented on a display by a hotspot manager. UI interaction including selection of a location in the view is received. A hotspot object associated to the selected location of the view may be modified based on the UI interaction when the hotspot manager is in an edit mode. The hotspot object contains information of the selected location. An updated content of the hotspot object may be presented in the edit mode, the updated content resulting from changes to an existing hotspot object or addition of a new hotspot object.

Abstract: A syringe containing drug to be injected, the syringe includes an injection tube, a needle mounted at the front end of the injection tube, a rubber sealing jacket stopper jacketing on the peak of the needle and an injection tube core movably and hermetically put inside the injection tube, which is characterized in that the injection tube core consists of an ampule of cylindrical bottle shape and a piston, the back end of the ampule is closed and at its front end there are a flange and a neck portion, the central through hole of the flange and the neck portion is interpenetrated with the inner cavity of the bottle-shaped injection tube core; the outside top of the piston appears as a cone, and its outside lower part is a cylinder matching the inner wall of the injection tube, while the inside top of the piston appears as an inner cone, and the form of its inside lower part matches the shapes of the flange and the neck portion located at the front end of the ampule; at the cone-shaped top of the piston there is