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Phase Synchronization as a Mechanism of Controlling Spatiotemporal Chaos via External periodic signal

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Chinese Physics Letters 2004年第2期21卷 254-257页

作者：桑海波贺凯芬 TheKeyLaboratoryofBeamTechnologyandMaterialsModificationofEducationMinistry BeijingNormalUniversityBeijing100875 InstituteofLowEnergyNuclearPhysics BeijingNormalUniversityBeijing100875

We find that phase synchronization (PS) is a mechanism in which the spatiotemporal chaos (STC) can be suppressed to a spatially regular (SR) state by applying an external periodic signal in a one-dimensional driven drift-wave system. In the driving wave coordinate, the nonlinear system can be transformed to a set of coupled oscillators moving in a periodic potential. In this multi-dimensional system, the internal modes are slaved one by one through PS by the control signal. Two types of responses of the internal modes to the external periodic signal are observed. For some modes, the stabilization is through frequency-locking; while for the other modes, a special kind of PS without frequency-licking, namely multi-looping PS, is developed.

关键词： periodic signal One-to-one correspondence periodic coupled oscillators signals phase synchronization Polystyrenes Vibrations modes potential

Influences of a periodic signal on a noisy synthetic gene network

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Science China Chemistry 2011年第6期54卷 992-997页

作者： LIU Yan LI Nan School of Logistics Beijing Wuzi University Beijing 101149 China School of Chemical Engineering and Environment Beijing Institute of Technology Beijing 100081 China

The effects of noise and a periodic signal on a synthetic gene network have been investigated. By tuning the distance of a parameter from the Hopf bifurcation point, both implicit internal signal stochastic resonance and explicit internal signal stochastic resonance can be induced by noise. Furthermore, a switch process can also be elicited. When a periodic signal is coupled to the gene network, two interesting phenomena occur with the modulation of the frequency of the signal: the effect of noise amplifying cellular signal can be inhibited or even destroyed, and "locked" coherence resonance occurs.

关键词： fluctuation periodic signal synthetic gene network stochastic resonance

Research and application of regular phenomenon between periodic signals

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Chinese Physics B 2014年第12期23卷 124-127页

作者：叶云霞宣宗强谷军闪宣勇 Department of Measurement and Instrumentation Xidian University

The phase change between periodic signals is regular. Research on the regular phenomenon between periodic signals is helpful to improve the precision of some measurements and develop some new measurement methods. So it is necessary to analyze the characteristics of the greatest common factor frequency and the least common multiple period universally existing in periodic signals. The regulation of the quantitative phase shift resolution between periodic signals is *** cause of difference in phase characteristics between periodic signals is explained well. In this paper we propose different application prospects based on the regular phenomenon between periodic signals, with focusing on the methods for high precision frequency measurement and transient stability measurement. The experimental results are satisfactory.

关键词： periodic signal phase coincidence frequency transient stability

Observation 20-s periodic signals on Mars from InSight,Sols 800-1,000

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Earth and Planetary Physics 2023年第2期7卷 193-215页

作者： HuiXing Bi DaoYuan Sun MingWei Dai Deep Space Exploration Laboratory/School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Laboratory of Seismology and Physics of Earth’s Interior School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology ChinaHefei 230026China

Seismometers of the InSight probe(Interior Exploration using Seismic Investigation,Geodesy and Heat Transport)currently operating on Mars have recorded not only seismic events but also high-frequency non-seismic periodic signals that appear to have been induced by variations in the Martian environment and the ***,we report an observation of a long-period signal with a dominant period of~20 s from Martian solar days(Sol)800 to Sol 1,*** 20-s signal is detected mostly at quiet nighttime—from22:00 to 04:00 LMST(Local Mean Solar Time)—at the InSight landing *** measurement of the particle motion suggests that this linearly polarized signal focuses on the horizontal plane with an angle of~30°from the *** examining the temporal variation of the signal’s amplitude and polarization angle and its times of occurrence in relation to the planet’s atmospheric data,we suggest that this20-s signal may be relevant to wind and temperature variations on ***,we study the possible influence of this 20-s signal on the noise autocorrelation and find that the stacked autocorrelograms can be quite different when the 20-s signal is present.

关键词： Mars periodic signal particle motion autocorrelation