This study aims to investigate and optimize the effects of the main parameters including the particle size, gravity and magnetic separation combination, high gradient magnetic separation, magnetic field intensity, shaking table slope, washing water flow, and electrostatic separation upon the rare earth element (REE) recoveries from iron mine waste. The electron microprobe showed that high amoun...

Combined withering and shaking processes are key steps in the formation of characteristic floral fruity aromas black teas. However, effect sequencing on volatile compounds aroma tea has not been evaluated to date. This study used headspace solid-phase microextraction gas chromatography-tandem mass spectrometry detect teas after withering-shaking shaking-withering processing. Five main different...

This paper presents a dynamic nonlinear numerical simulation of a 5-story full-scale steel frame structure based on Perform-3D. Flexibility-based fiber element and Maxwell model are adopted for structure member simulation after a post analysis of the shaking table test of a 4-story full-scale steel frame. The author simulates the low cyclic reciprocating load test for the steel members with fib...

A perimeter security system based on ultra-weak fiber Bragg grating high-speed wavelength demodulation was proposed. The for signal acquisition and calculation designed field programmable gate array (FPGA) platform. principle of recognition method were analyzed theoretically, the Support Vector Machine model introduced to optimize event accuracy system. experimental containing 1000 gratings, se...

a rhamnolipid–type biosurfactant production by pseudomonas aeruginosa mm1011 was studied in a miniaturized shaken bioreactor. the operational parameters, affecting the biosurfactant production in shaken bioreactors, such as shaking frequency (200, 250, 300 rpm), filling volume (50, 75, 100 ml), and aeration rate (0.2, 0.6, 1 vvm), were optimized using response surface methodology. the optimizat...