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Stochastic resonance in a monostable system driven by square-wave signal and dichotomous noise 被引量:4
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作者 郭锋 罗向东 +1 位作者 李少甫 周玉荣 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第8期156-162,共7页
This paper investigates the stochastic resonance in a monostable system driven by square-wave signal, asymmetric dichotomous noise as well as by multiplicative and additive white noise. By the use of the properties of... This paper investigates the stochastic resonance in a monostable system driven by square-wave signal, asymmetric dichotomous noise as well as by multiplicative and additive white noise. By the use of the properties of the dichotomous noise, it obtains the expressions of the signal-to-noise ratio under the adiabatic approximation condition. It finds that the signal-to-noise ratio is a non-monotonic function of the asymmetry of the dichotomous noise, and which varies non- monotonously with the intensity of the multiplicative and additive noise as well as the system parameters. Moreover, the signal-to-noise ratio depends on the correlation rate and intensity of the dichotomous noise. 展开更多
关键词 stochastic resonance monostable system asymmetric dichotomous noise
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Asymptotic stability of monostable wavefronts in discrete-time integral recursions
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作者 Lin Guo Li WanTong Ruan ShiGui 《Science China Mathematics》 SCIE 2010年第5期148-157,共10页
The aim of this work is to study the traveling wavefronts in a discrete-time integral recursion with a Gauss kernel in R2.We first establish the existence of traveling wavefronts as well as their precise asymptotic be... The aim of this work is to study the traveling wavefronts in a discrete-time integral recursion with a Gauss kernel in R2.We first establish the existence of traveling wavefronts as well as their precise asymptotic behavior.Then,by employing the comparison principle and upper and lower solutions technique,we prove the asymptotic stability and uniqueness of such monostable wavefronts in the sense of phase shift and circumnutation.We also obtain some similar results in R. 展开更多
关键词 DISCRETE-TIME INTEGRAL RECURSION comparison principle upper and lower solutions monostable wave stability
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Modeling and analysis of magnetic spring enhanced lever-type electromagnetic energy harvesters
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作者 Ning YU Xiangyi FEI +1 位作者 Chuanyu WU Bo YAN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2022年第5期743-760,共18页
This study presents a novel enhanced monostable lever-type electromagnetic energy harvester(L-EEH).According to the positions of the coil and the lever pivot,four configurations are discussed to realize a better harve... This study presents a novel enhanced monostable lever-type electromagnetic energy harvester(L-EEH).According to the positions of the coil and the lever pivot,four configurations are discussed to realize a better harvesting performance of the L-EEHs.On the basis of establishing the theoretical model of the L-EEH,the corresponding analytical solutions can be obtained by applying the harmonic balance method.The effects of the nonlinear coefficient,the lever ratio,the mass ratio,and the circuit parameters on the energy harvesting performance of L-EEHs are analyzed and discussed.The numerical and experimental efforts are carried out to verify the theoretical model and the energy harvesting performance.The results demonstrate that the maximum output voltage can be achieved with an appropriate lever ratio.Furthermore,the L-EEH possesses a considerable energy harvesting performance under a smaller lever ratio compared with the other three configurations.The output power can also be improved by adjusting the tip mass of the lever.The proposed L-EEH has a considerable operating bandwidth and an output power,which can reach 146.6 mW under the excitation amplitude of 0.3 g. 展开更多
关键词 electromagnetic energy harvesting monostable nonlinear vibration lever HARVESTER
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Single CDBA Based Voltage Mode Bistable Multivibrator and Its Applications
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作者 Rishi Pal Rajeshwari Pandey +1 位作者 Neeta Pandey Ramesh Chandra Tiwari 《Circuits and Systems》 2015年第11期237-251,共15页
In this paper, current differencing buffered amplifier (CDBA) based bistable multivibrators are introduced. Each presented circuit is constructed using single CDBA as the basic active building block and three resistor... In this paper, current differencing buffered amplifier (CDBA) based bistable multivibrators are introduced. Each presented circuit is constructed using single CDBA as the basic active building block and three resistors. Two applications namely an astable and a monostable multivibrator are also realized to demonstrate the usefulness of the proposed bistable multivibrators. The presented circuits are simulated using PSPICE from Cadence Orcad16.2 to verify their functionality. Simulation results agree well with the theoretical analysis. 展开更多
关键词 SCHMITT TRIGGER BISTABLE MULTIVIBRATOR CDBA monostable MULTIVIBRATOR
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Exchange bias for ferromagnetic/antiferromagnetic bilayers with the uniaxial anisotropy being misaligned with the exchange anisotropy 被引量:5
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作者 BAI YuHao1 & YUN GuoHong1,2 1 College of Physical Science and Technology,Inner Mongolia University,Hohhot 010021,China 2 Key Laboratory of Physics and Chemistry of Functional Materials,College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot 010022,China 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2009年第12期1885-1892,共8页
Using the principle of minimal energy and S-W model,the exchange bias for ferromagnetic/antiferro-magnetic bilayers has been investigated when the uniaxial anisotropy is misaligned with the exchange anisotropy. Accord... Using the principle of minimal energy and S-W model,the exchange bias for ferromagnetic/antiferro-magnetic bilayers has been investigated when the uniaxial anisotropy is misaligned with the exchange anisotropy. According to the relation between the energy of the bilayer and the orientation of ferro-magnetic magnetization,it is found that the bilayer will be in the monostable state or bistable state when the external field is absent in the initial magnetization state. The monostable state or bistable state of the bilayer,which determines the angular dependence of exchange bias directly,is controlled by the competition between the exchange anisotropy and uniaxial anisotropy. When the applied field is parallel to the intrinsic easy axes and intrinsic hard axes,one of the switching fields of the hysteresis loop shows an abrupt change,while the other keep continuous by analyzing the magnetization reversal processes. Consequently,the exchange bias field and the coercivity will show a jump phenomenon. The numerical calculations indicate that both the magnitude and direction of the exchange anisotropy will significantly affect the angular dependence of exchange bias. The jump phenomenon of exchange bias is an intrinsic property of the bilayer,which is dependent on the interfacial exchange-coupling constant,the orientation of the exchange anisotropy,the thickness and uniaxial anisotropy constant of the ferromagnetic layer. 展开更多
关键词 monostable STATE BISTABLE STATE intrinstic easy AXIS intrinstic hard AXIS switching field
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