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Articles by Hu Feng
Total Records ( 2 ) for Hu Feng
  Wang Jianming , Hu Feng , Li Ping and Geng Yuan
  Production of hydrolysates by Actinomucur elegans during soy-protein deep-liquid fermentation was a promising prospects for future applications in the protein hydrolysate industry. And the optimal incubation conditions for protease production by Actinomucor elegan, which have been investigated in several studies. The hydrolyzing conditions were optimized by the single factor and orthogonal tests. Five single factor of important effect on the DH and PCL were explored. The optimum condition was determined as fermentation time 5 days, substrate concentration 3%, initial pH 6.0, liquid medium volume 80 (mL bottle-1), Inoculums concentration 4.5 (v/v). The maximum DH can reach 38.29%.
  Wei Chen , Houliang Qian , Hanqi Yu , Hu Feng and Gui Tong
  In order to solve the high frequency oscillation generated from the video signal of the camera, the paper proposes a method to improve the stability of high frequency oscillation of common sensor signal which means the high frequency oscillation signal generated from the sensor module can increase the phase margin of the unstable signal through PD controller, thus produces a stable video signal and then through the circuit of AGC (Automatic Gain Control), the automatic compensation of the frequency can be achieved and finally the fourth-order low-pass circuit is used to meet the requirement of cutoff frequency of the sensor signal processing and the stability of the signal and the high frequency performance can be ultimately improved.
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