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您的检索式：作者名="Yanfang MEI"
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| 1 | Optimization of Extraction Conditions for SOD in Sedum aizoon by the Response Surface Method显示文摘This paper aimed to optimize extracting conditions of SOD in Sedum aizoon by response surface method. First,the single factor optimization tests were carried out. Three single factors were time,p H and liquid-solid ratio respectively. By Design expert 8. 0. 5 software,17 kinds of test scheme were designed. The protein yield of each scheme was obtained,and Design expert 8. 0. 5 software was used to conduct variance analysis and interactive analysis among factors,to obtain the corresponding mathematical model. The results showed that in single factor experiments,the optimal time was 1 h,p H was 7. 8,and liquid-solid ratio was 15:1. The interactive analysis indicated that the optimal scheme for extracting SOD in Sedum aizoon was time of 0. 98 h,p H of 7. 79,liquid-solid ratio of 13. 71:1. By the method of pyrogallol autoxidation,the extracted SOD enzyme activity was measured,namely 12 U/g. The results could provide a reference for further utilization and research of Sedum aizoon resource. | Mei WANG Jiru WU Yanfang LIU Wendou WANG | 2017 | Asian Agricultural Research2017，9，1： | 1 |
| 2 | Observer-based boundary control for an asymmetric output-constrained flexible robotic manipulator显示文摘Dear editor,With the rapid development of robotics, flexible robotic manipulators have played an important role in industrial production and manufacture because of their lightweight, higher operation speed and better energy efficiency [1]. However, flexible materials will result in vibration. Besides, in practical applications, external disturbances and constraints caused by environmental factors or technique requirements diffusely exist, which will affect the operation accuracy of the manipulators. Thus, we focus on the angle tracking and vibration problem of the flexible robotic manipulator with external disturbances and output constraints. | Yu LIU Xiongbin CHEN Yanfang MEI Yilin WU | 2022 | Science China(Information Sciences)2022，65，3： | 1 |
| 3 | Effect of Electric Field Intensity on the Morphology of Magnetic-field-assisted Electrospinning PVP Nanofibers显示文摘Polyvinylpyrrolidone(PVP) nanofibers were processed by magnetic-field-assisted electrospinning(MFAES) technique. Since electric field intensity was one of the most important parameters influencing fiber morphology, the research aimed to study how electric field intensity affects fiber morphology in MFAES technique. The experimental results revealed that the distribution of diameter widened while the average diameter of PVP fibers decreased and the degree of the alignment reduced with the increase of electric field intensity. However, the fibers would be conglutinated together when the electric field intensity was too low. Also, the increase of working distance made the average diameter and the degree of the alignment increase slightly under the same electric field intensity, but the fibers could be partially curved instead of being fully straight if the working distance was too long. It was also indicated that maintaining the electric field intensity at 1 kV/cm with the voltage-distance combinations of 12 kV-12 cm(for 12wt% PVP) and 15 kV-15 cm(for 14wt% PVP) among all other combinations would result in the optimal alignment as well as a narrow size distribution of the fibers. | MEI Linyu HAN Rui GAO Yanfang FU Yizheng LIU Yaqing | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，6： | 0 |
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