Two kinds of clamping in micro/nano scale experiments are investigated in this paper, one based on electron-beam-induced deposition, and the other on the van der Waals interaction. The clamping strength and mechanism ...Two kinds of clamping in micro/nano scale experiments are investigated in this paper, one based on electron-beam-induced deposition, and the other on the van der Waals interaction. The clamping strength and mechanism are analyzed both theoretically and experimentally. The influence of relative humidity on the micro/nano clamping and the method of electrostatic clamping are discussed. The clamping strength and performance of different clamping methods are compared considering the size and material of the clamped objects, and the application environments.展开更多
We investigate how firing activity of globally coupled neural network depends on the coupling strengthC and system size N.Network elements are described by space-damped FitzHugh-Nagumo (SCFHN) neurons withthe values o...We investigate how firing activity of globally coupled neural network depends on the coupling strengthC and system size N.Network elements are described by space-damped FitzHugh-Nagumo (SCFHN) neurons withthe values of parameters at which no firing activity occurs.It is found that for a given appropriate coupling strength,there is an intermediate range of system size where the firing activity of globally coupled SCFHN neural network isinduced and enhanced.On the other hand,for a given intermediate system size level,there exists an optimal valueof coupling strength such that the intensity of firing activity reaches its maximum.These phenomena imply that thecoupling strength and system size play a vital role in firing activity of neural network.展开更多
基金supported by the NSFC (Nos10972113,10572071 and 10732080)the National Basic Research Program of China (Nos2007CB936803 and 2010CB631005)the SRFDP (No20070003053) and the Central Laboratory of Strength and Vibration of Tsinghua University
文摘Two kinds of clamping in micro/nano scale experiments are investigated in this paper, one based on electron-beam-induced deposition, and the other on the van der Waals interaction. The clamping strength and mechanism are analyzed both theoretically and experimentally. The influence of relative humidity on the micro/nano clamping and the method of electrostatic clamping are discussed. The clamping strength and performance of different clamping methods are compared considering the size and material of the clamped objects, and the application environments.
基金National Natural Science Foundation of China under Grant Nos.70571017 and 10647001Natural Science Foundation of Guangxi Province under Grant No,0728042
文摘We investigate how firing activity of globally coupled neural network depends on the coupling strengthC and system size N.Network elements are described by space-damped FitzHugh-Nagumo (SCFHN) neurons withthe values of parameters at which no firing activity occurs.It is found that for a given appropriate coupling strength,there is an intermediate range of system size where the firing activity of globally coupled SCFHN neural network isinduced and enhanced.On the other hand,for a given intermediate system size level,there exists an optimal valueof coupling strength such that the intensity of firing activity reaches its maximum.These phenomena imply that thecoupling strength and system size play a vital role in firing activity of neural network.
