Abstract: The present application provides a catalyst for copolymerization of ethylene and methyl methacrylate and an application thereof. The catalyst includes a main catalyst, and the main catalyst is obtained by compounding a compound of formula (I) and a compound of formula (II); a mole ratio of the compound of formula (I) to the compound of formula (II) is (1:49) to (49:1). The catalyst has an excellent catalytic activity, and a copolymer of ethylene and methyl methacrylate with a high molecular weight can be obtained, with a weight average molecular weight of not less than 1×105 g/mol.

Abstract: Provided in the present application are a pixel arrangement structure, a metal mask and an organic light-emitting display apparatus. The pixel arrangement structure comprises a plurality of pixel units, which are arranged in an array in order, wherein each pixel unit comprises a first sub-pixel, a second sub-pixel, and two third sub-pixels having the same area, the two third sub-pixels having the same area are arranged in the same row, the first sub-pixel and the second sub-pixel are arranged in another row that is adjacent thereto, and the third sub-pixels having the same area and at least one third sub-pixel that is adjacent thereto correspond to the same opening region of the metal mask.

Abstract: The present disclosure discloses a gradient single-crystal positive electrode material, which has a chemical formula of LiNixCoyA1-x-yO2@mLiaZbOc, wherein 0<x<1, 0<y<1, 0<x+y<1, 0<m<0.05, 0.3<a?10, 1?b<4, and 1?c<15, A is at least one of Mn, Zr, Sr, Ba, W, Ti, Al, Mg, Y, and Nb, and Z is at least one of B, Al, Co, W, Ti, Zr, and Si. The atomic ratio of the content of Co on the surface of the single-crystal positive electrode material particle to the content of Ni+Co+A on the surface is greater than 0.4 and less than 0.8, and the atomic ratio of Co at a depth 10% of the radius from the surface of the single crystal positive electrode material particle is not less than 0.3; and the single-crystal positive electrode material particle has a roundness of greater than 0.4, and is free from sharp corners.

Abstract: A waterproof cover for light strip end, comprising an end cover main body, wherein a recess is formed on an inner side the main body end cover, and waterproof gel is placed in the recess, and two groups of flexible plastic straps are connected symmetrically on both sides of the main body end cover, and t straps are connected with buckle mechanisms. Insert an end of the light strip body into the recess, so that the end of the light strip body squeezes the waterproof gel, and then flip the two groups of flip covers towards each other. The flip covers and flexible plastic straps move towards each other. The teeth on the plastic buckle squeeze each other, thereby causing the main body of the plastic buckle to bend and deform until the teeth engage with each other, so that the two groups of flap covers are fixedly connected.

Abstract: A battery pack (100) and a vehicle including the battery pack (100) are provided. The battery pack (100) includes a housing, a battery core group (20), and a distribution box (30) detachably mounted on the housing. The housing is provided with a receiving space (101). Both the battery core group (20) and the distribution box (30) are received in the receiving space (101). The battery core group (20) is electrically connected to the distribution box (30). The housing includes a bottom plate (11) and an access cover (12). The bottom plate (11) is provided with an access port (110). The access port (110) communicates with the receiving space (101). The distribution box (30) faces the access port (110). The access cover (12) is detachably mounted on the bottom plate (11) and covers the access port (110).

Abstract: Embodiments provide a multi-phase clock generator. The clock generator includes a loop oscillator, a RC filter, a bias current source and a frequency injection source. The loop oscillator includes N levels of CMOS phase inverters which are connected in series and form a loop, N represents an odd number greater than 1. The N levels of CMOS phase inverters have the same structures, each of which includes a CMOS phase inverter main body and a tail current source which is a current mirror of the bias current source. As an effect of RC filter, a clock input signal inputted by the frequency injection source is applied to the first level tail current source, while other tail current sources are not influenced. Injection locking is induced, such that phase noise and frequency stray can be reduced.

Abstract: Embodiments provide a multi-phase clock generator. The clock generator includes a loop oscillator, a RC filter, a bias current source and a frequency injection source. The loop oscillator includes N levels of CMOS phase inverters which are connected in series and form a loop, N represents an odd number greater than 1. The N levels of CMOS phase inverters have the same structures, each of which includes a CMOS phase inverter main body and a tail current source which is a current mirror of the bias current source. As an effect of RC filter, a clock input signal inputted by the frequency injection source is applied to the first level tail current source, while other tail current sources are not influenced. Injection locking is induced, such that phase noise and frequency stray can be reduced.