Abstract: A permanent magnet motor, a compressor and an air conditioner are disclosed. The permanent magnet motor has a stator and a rotor. The stator has a stator core and a stator winding. The rotor is spaced apart from the stator in an inner-outer direction. The rotor has a rotor core and a permanent magnet embedded in the rotor core. A maximum distance between an outer peripheral contour of a cross section of the rotor and a center of the cross section of the rotor is D1, an axial length of rotor core is L, and a rated power of permanent magnet motor is P. D 1, L and P satisfy: D1/L?1.7 and P/(D12×L)?8.5, and the unit of P is W, and the unit of D1 and L is cm.

Abstract: The present invention discloses a temperature control method and a system for a blade shaft of an ultrasonic scalpel based on a temperature distribution function model. The system includes the blade shaft of the ultrasonic scalpel and a transducer that are coupled to each other, and is connected to a generator through a cable. When the blade shaft of the ultrasonic scalpel works, actual temperature of the blade shaft is distributed along a one-dimensional space of the blade shaft. The temperature distribution on the blade shaft is determined by a set of the real-time working feedback parameter, the physical structure feature parameter, and the surrounding environmental parameter of the blade shaft. Each temperature distribution corresponds to a solution of the temperature distribution function, and the function can be approximated by a machine leaning algorithm.

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 pile-side lateral static load device includes a jack system, a liftable jack cart, a loading jack fixing system, and a loading system. The jack system includes a jack body. The jack system is installed on the liftable jack cart through the loading jack fixing system. The loading system is installed on the loading jack fixing system, and the loading system includes counter-pressure loading systems and counter-tension loading systems. The pile-side lateral static load device has a simple structure, is convenient to install and operate, and can complete lateral loading and in-situ tests under different pile diameters, different tonnages and different precisions, so as to facilitate a simulation test of in-situ lateral loading of a pile.

Abstract: The invention provides a cab roof of a vehicle with a movable panel. The cab is provided with a front windscreen, a rear deck or rear walls, and door frames at both sides. The door frames are connected with the front windscreen at the front side, with the rear decks or rear walls at the rear side, forming the enclosing sidewalls of the cab. The connecting cover is hinged with the enclosing sidewalls at the front end, and is provided with rear windscreen at the rear end. The entire cab roof is consisted of the connecting cover and the rear windscreen. A telescopic bellow is at the bottom of the cab roof, which connects the enclosing sidewalls at the lower portion. A raising and lowering device is at the bottom of the rear side of the cab roof. The vehicle can be used as a car where passengers can be seated in the rear seats, and as well as a sports car where the cab roof drops on the enclosing sidewalls by pressing the telescopic bellow.

Abstract: The invention provides a cab roof of a vehicle with a movable panel. The cab is provided with a front windscreen, a rear deck or rear walls, and door frames at both sides. The door frames are connected with the front windscreen at the front side, with the rear decks or rear walls at the rear side, forming the enclosing sidewalls of the cab. The connecting cover is hinged with the enclosing sidewalls at the front end, and is provided with rear windscreen at the rear end. The entire cab roof is consisted of the connecting cover and the rear windscreen. A telescopic bellow is at the bottom of the cab roof, which connects the enclosing sidewalls at the lower portion. A raising and lowering device is at the bottom of the rear side of the cab roof. The vehicle can be used as a car where passengers can be seated in the rear seats, and as well as a sports car where the cab roof drops on the enclosing sidewalls by pressing the telescopic bellow.