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您的检索式：作者名="LI Fengran"
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| 1 | Central Pattern Generator(CPG)Control of a Biomimetic Robot Fish for Multimodal Swimming显示文摘This paper introduces the design and control of a biomimetic robot fish for multimodal swimming.The biomimetic design consists of three parts:the rigid head,the wire-driven body and the compliant tail.The control is an improved Central Pattern Generator(CPG)with the high-level control command:(M,co,B,R),where M is the amplitude,co is the angular velocity,B is the offtet and R is the time ratio between two phases forming one flapping cycle.This method differs from previous research in two aspects:(1)The CPG control is firstly implemented on the wire-driven robot fish.(2)The improved CPG model synthesizes symmetrical flapping in cruising and asymmetrical flapping in turning for the robot fish.The asymmetrical flapping refers to the asymmetry of the offset and the time ratio.This combination of the design and the control has several advantages over the existing multimodal swimming robot fishes.First,it uses just one driving motor for undulatory oscillation while the others need to use two or more motors.Second,with just one motor,the CPG control can be easily implemented.Third,the use of the time ratio,R,makes the robot fish turn more naturally and effectively.Experimental results show the robot fish achieved the maximum speed of 1.37 Body Length/Second(BL.s-1)and the largest turning rate of 4577s.Additionally,in many swimming conditions,its Strouhal Number falls in the range from 0.2 to 0.4,which implies the robot fish is efficient. | Fengran Xie Yong Zhong Ruxu Du Zheng Li | 2019 | Journal of Bionic Engineering2019，16，2： | 4 |
| 2 | Synthesis and Tumor Cytotoxicity of Novel1,2,3-Triazole-substituted 3-Oxo-oleanolic Acid Derivatives显示文摘Fifteen novel 3-oxo-oleanolic acid esters bearing aryl substituted 1,2,3-triazolyl methyl moiety weresynthesized via the method of Copper(I)-catalyzed Huisgen cycloaddifion. The cytotoxicity evaluation results of thesecompounds against five human tumor cell lines show that most of these compounds presented potent activity andselectivity against A375-S2 and HT1080 cells. Compound 6c, with a p-NO2 at the bezene ring, possesses the bestinhibitory activity against A375-S2(IC50=2.82 μmol/L) and HT1080(IC50=1.69 μmol/L). | LI Fengran LIU Yang WANG Shuai WEI Gaofei CHENG Maosheng | 2016 | Chemical Research in Chinese Universities2016，32，6： | 1 |
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