Weiyong Zhu

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Biochar pyrolyzed from wheat straw was innovatively used for the adsorptive removal of cationic dye methylene blue through exposure to a magnetic field. The adsorption capability of the biochar pyrolyzed at 200 °C exceeded that of samples pyrolyzed at higher temperatures. The surface acidic functional groups of wheat straw biochar were deduced to be more(More)
Conference Factor (CF) algorithm is effective to suppress the side lobe of the ultrasonic image except for the far-field. To improve this demerit, a new algorithm Chirp Coherence Factor (Chirp CF) is proposed in this paper. In this method, the chirp signal is transmitted, and the received signals are processed with the pulse compression combined with(More)
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