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in this work, a novel low-cost and high-efficiency, multi-junction solar cells architecture is proposed. It is expected this kind of design will provide a significant approach for the high-efficient, low-cost solar cells, which will promote the application of solar cells. A thin planar reflection-type diffractive optical element (DOE) has been designed to simultaneously focus and split the sunlight...
The treatment and reclamation of ammonium chloride wastewater by reverse osmosis technique in the rare earth industry was investigated. The concentration of ammonium chloride in the wastewater can be concentrated to 9.0% by reverse osmosis technique, and the permeate water can be desalted to less than 20mg/L by the second pass reverse osmosis, so that the permeate water can be reused for production...
The flotation column is a multivariable process whose main control objective is to guarantee the metallurgical yield set for the process operation, expressed by the grade and the recovery of the valuable mineral in the concentrate. The on-line estimation of grade usually requires a significant amount of work in maintenance and calibration of on-stream analyzers, in order to maintain good accuracy...
Low-power laser/arc hybrid welding process of magnesium alloy shows that the weld capability of tungsten-inert-gas arc is improved under the action of laser pulses. The effect of laser pulse on arc plasma is analyzed by studying the plasma spectra, plasma shapes, and arc voltage in this paper. On the one hand, laser pulse attracts arc plasma to laser keyhole and improves the stability of arc plasma;...
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