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Model-based adaptive locomotion and clustering control of microparticles through ultrasonic topological charge modulation
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作者 h.s.lee H.X.CAO +1 位作者 D.JUNG C.S.KIM 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2023年第4期623-640,共18页
We present a novel motion control technique for microrobot clusters to exploit the characteristics of the ultrasonic field.The method comprises two steps,i.e.,introducing an ultrasonic actuation(UA)linear model for th... We present a novel motion control technique for microrobot clusters to exploit the characteristics of the ultrasonic field.The method comprises two steps,i.e.,introducing an ultrasonic actuation(UA)linear model for three-dimensional(3D)locomotion and controlling the topological charge(TC)in the ultrasonic vortex for microrobot clustering.Here,the TC is a controllable parameter for the expansion and contraction of the pressure null space inside the vortex.We present a TC control method to cluster sporadically distributed microrobots in a specific workspace.To validate the concept,a UA system composed of 30 ultrasonic transducers with 1 MHz frequency is fabricated,and the characteristics of the generated acoustic pressure field are analyzed through simulations.Subsequently,the performances of the adaptive controller for precise 3D locomotion and the TC control method for clustering are evaluated.Finally,the UA technology,which performs both clustering and locomotion in a complex manner,is validated with a gelatin phantom in an in-vitro environment. 展开更多
关键词 ultrasonic actuation(UA) topological charge(TC) adaptive control particle manipulation
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Kinetic Studies of Electrochemical Oxidation of 1,3-Benzenedithiol
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作者 h.s.lee X.Q.Yang +1 位作者 J.McBreen T.A.Skotheim 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 1993年第3期231-239,共9页
The electrochemical oxidation of 1, 3-benzenedithiol was investigated in a 0. 100 mol/L tetrabutylammonium perchlorate/acetonitrile electrolyte. The electrochemical techniques used were potential sweep, bulk electroly... The electrochemical oxidation of 1, 3-benzenedithiol was investigated in a 0. 100 mol/L tetrabutylammonium perchlorate/acetonitrile electrolyte. The electrochemical techniques used were potential sweep, bulk electrolysis, rotating disc and the potential step method. The combination of the techniques yielded the number of electrons transferred per molecule, the reaction order, the transfer coefficient, the diffusion coefficient and concentration of dithiol anions, the standard heterogeneous rate constant as well as the formal potential and equilibrium constant of the preceeding dissociation reaction. This paper also illustrates the methods for studying the electrode kinetics of reactions which (a) involve a chemical reaction preceeding the electron-transfer process, (b) have insoluble polymer products, and (c) are totally irreversible. 展开更多
关键词 Electrochemical oxidation 1 3-Benzenedithiol Electrode kinetics Organ-ic disulfide
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KIMS地下实验中μ子本底的研究(英文)
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作者 朱敬军 康克军 +16 位作者 李元景 李金 J.W.Kwak H.Bhang S.Y.Kim h.s.lee J.Lee S.S.Myung M.J.Lee S.C.Kim S.K.Kim J.I.Lee Y.D.Kim M.J.Hwang Y.J.Kwon I.S.Hahn H.J.Kim 《高能物理与核物理》 EI CSCD 北大核心 2005年第8期721-726,共6页
KIMS是寻找和研究暗物质WIMP的实验组.在WIMP寻找实验中,μ子是十分重要的一种本底.我们对地下700m深的Yangyang实验室内的μ子通量进行了测量.介绍了μ子探测器的结构和性能测试.描述了对μ子入射位置和角度分布的分析,并进行了蒙特卡... KIMS是寻找和研究暗物质WIMP的实验组.在WIMP寻找实验中,μ子是十分重要的一种本底.我们对地下700m深的Yangyang实验室内的μ子通量进行了测量.介绍了μ子探测器的结构和性能测试.描述了对μ子入射位置和角度分布的分析,并进行了蒙特卡罗模拟.实验室内的μ子通量测量值为(7.0±0.4)×10-8/s/cm2/sr. 展开更多
关键词 KIMS 地下实验 Μ子 暗物质 位置重建 WIMP
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