Abstract: The present disclosure discloses a sintered neodymium-iron-boron magnet and a preparation method thereof. The sintered neodymium-iron-boron magnet includes the following raw materials in mass percentage: 1%-40% of an iron powder or a steel powder with a magnetic induction intensity of more than 1.2 T, not more than 10% of a praseodymium-neodymium metal hydride powder, and a remainder of a neodymium-iron-boron fine powder, wherein the mass percentages of the above raw materials add up to 100%. The preparation method includes: weighing the raw materials in mass percentage; mixing the weighed raw materials uniformly, and then subjecting to magnetic-field press molding, isostatic pressing, sintering and tempering to obtain the sintered neodymium-iron-boron magnet.

Abstract: Disclosed is a device for efficiently recycling nickel from wastewater and a method. The device includes a housing, and an extraction unit and an electro-deposition unit which are respectively arranged inside the housing. The device is reasonable in overall structural design. An oscillating and floating component and a rotating component in an extraction cavity are used to fully and uniformly mix a solution to maximize the extraction strength. A mixing component in an electro-deposition cavity is used to accelerate ion dispersion, to better recycle nickel. The device is easy to operate, low in cost and suitable for mass promotion.

Abstract: An energy Internet system, an energy routing conversion device, and an energy control method, relating to a field of energy information. An alternating-current (AC) side energy routing conversion device of the energy Internet system includes a plurality of first route ports, and a direct-current (DC) side energy routing conversion device includes a plurality of second route ports, where each second route port is connected to a corresponding first route port by means of a corresponding DC busbar. A plurality of energy devices are connected to a DC busbar by means of corresponding first AC/DC converters or first DC converters. The AC side energy routing conversion device and the DC side energy routing conversion device collect energy information of the energy devices and adjust energy of the energy devices on a basis of energy balance constraint conditions.

Abstract: An omni-directional endoscope mechanism, one-handed joystick drives steel cable traction frame to swing and tilt, pulls steel cables and achieves bending part at front bent.

Abstract: A circuit, where a first end of a resistive random access memory (RRAM) included in the circuit includes a first end of the circuit, and a second end of the RRAM is coupled to a first end of a first switch and a first end of a second switch, a second end of the first switch includes a second end of the circuit, and a first control end of the first switch and a second control end of the second switch are configured to make the first switch closed and the second switch open at the same time. Therefore, a working status of the RRAM is flexibly controlled.

Abstract: A circuit, where a first end of a resistive random access memory (RRAM) included in the circuit includes a first end of the circuit, and a second end of the RRAM is coupled to a first end of a first switch and a first end of a second switch, a second end of the first switch includes a second end of the circuit, and a first control end of the first switch and a second control end of the second switch are configured to make the first switch closed and the second switch open at the same time. Therefore, a working status of the RRAM is flexibly controlled.