Abstract: Provided are a high-nickel ternary positive electrode material, including a matrix Li1+xNiaCobMgcYdM(1?a?b?c?d)O2±y, wherein M is selected from at least one of Mn, Zr, Al, B, Ta, Mo, W, Nb, Sb, and La, wherein: 0.8?a<1.0, 0<b<0.2, 0<c?0.005, 0<d?0.01, a+b+c+d<1, ?0.5<x<0.5, 0?y<0.02, a surface of the matrix is provided with a cladding layer, and the cladding layer contains a boron-containing alloy. The present application further relates to a method for preparing a high-nickel ternary positive electrode material, as well as a secondary battery, a battery module, a battery pack and an electrical apparatus.

Abstract: This application relates to the field of lighting, and discloses an LED filament. The LED filament includes an LED chip unit, a light conversion layer, and an electrode. The light conversion layer covers the LED chip unit and part of the electrode, and a color of a light emitted by the LED filament after lighting is different from a color of the light conversion layer. This application has the characteristics of uniform light emission and good heat dissipation effect.

Abstract: Disclosed are nucleated red blood cell warning devices and methods, and flow cytometers using the same. The devices, methods and flow cytometers can warn whether nucleated red blood cells exist in a blood sample. The warning device may obtain forward-scattered light information, side-scattered light information and fluorescence information when cells in the blood sample pass through a detection region of the flow cytometer. The warning device may generate a side-scattered light-fluorescence dot plot, so as to classify leucocytes into four groups, and may generate a forward-scattered light-fluorescence dot plot, where the forward-scattered light-fluorescence dot plot can include a leucocyte group region. The warning device may obtain a predetermined feature region located at the left side of the leucocyte group region, perform statistics on the amount of characterization cells in the predetermined feature region, and provide a warning when the number of the characterization cells exceeds a threshold value.