检索结果-南通市图书馆

synchronization　of　an　Ultrafast　Ti：Sapphire　Laser　to　the　S-Band　Microwave

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2004年第6期21卷 1039-1040页

作者： LIUSheng-Guang WANGMing-Kai SUNDa-Rui DAIJian-Ping LIYong-Gui FreeElectronLaserLaboratory InstituteofHighEnergyPhysicsChineseAcademyofSciencesBeijing100800

We have synchronized a 102-MHz ultrafast self-mode-locked Ti:sapphire laser to a 2856-MHz rf source with the sample-locking technology. The relative root-mean-square time-jitter is 0.57ps and the maximum time jitter is 2.60ps. This is the first time that synchronization between the ultrafast laser pulse and the s-band microwave has been accomplished in China. Potential applications include synchronization of lasers and rf power sources in particle accelerator experiments and high-resolution pump–probe experiments.

关键词： synchronization

synchronization of Coupled Neurons Controlled by a Pacemaker

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第1期28卷 43-46页

作者： LI Mei-Sheng ZHANG Hong-Hui ZHAO Yong SHI Xia LMIB and School of Mathematics and System Sciences Beihang University Beijing 100191 Department of Dynamics and Control Beihang University Beijing 100191 School of Science Beijing University of Posts and Telecommunications Beijing 100876

We investigate synchronization of Hindmarsh Ftose neurons with gap junctions under the control of a pacemaker. In a ring Hindmarsh-Rose neuronal network, the coupled neurons with the pacemaker can occur in synchronization more easily than those without the pacemaker. Furthermore, the pacemaker can induce phase synchronization or nearly-complete synchronization of nonidentical neurons. This synchronization can occur more easily when time delay is considered. Theses results can be helpful to understand the activities of the real neuronal system.

关键词： Rosa synchronization

synchronization and bidirectional communication without delay line using strong mutually coupled semiconductor lasers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第7期19卷 167-171页

作者：李光辉王安帮冯野汪洋 Physics Department College of ScienceTaiyuan University of Technology

This paper numerically demonstrates synchronization and bidirectional communication without delay line by using two semiconductor lasers with strong mutual injection in a face-to-face configuration. These results show that both of the two lasers＇ outputs synchronize with their input chaotic carriers. In addition, simulations demonstrate that this kind of synchronization can be used to realize bidirectional communications without delay line. Further studies indicate that within a small deviation in message amplitudes of two sides （±6%）, the message can be extracted with signal-noise-ratio more than 10 dB; and the signal-noise-ratio is extremely sensitive to the message rates mismatch of two sides, which may be used as a key of bidirectional communication.

关键词： synchronization bidirectional communication without delay line semiconductor laser

synchronization of Complex Network with Drivingly Coupled Scheme

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2007年第7期24卷 1853-1856页

作者：陈良陆君安 School of Mathematics and Statistics Wuhan University Wuhan 430072

We present a network model with a new coupled scheme which is the generalization of drive-response systems called a drivingly coupled network. The synchronization of the network is investigated by numerical simulations based on Lorenz systems. By calculating the largest transversal Lyapunov exponents of such network, the stable and unstable regions of synchronous state for eigenvalues in such network can be obtained and many kinds of drivingly coupled arrays based on Lorenz systems such as all-to-all, star-shape, ring-shape and chain-shape networks are considered.

关键词： synchronization Drivingly Lyapunov

synchronization of chaotic VCSELs by external chaotic signal parameter modulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2009年第10期7卷 945-948页

作者：王伟张胜海钱兴中王彦斌 Department of Mathematics and Physics Institute of ScienceInformation Engineering University Sergeant College of the Second Artillery College of Optoelectric Science and Engineering National University of Defense Technology

synchronization of chaotic vertical-cavity surface-emitting lasers （VCSELs） is achieved by external chaotic signal modulation successfully. Simulation indicates that we can get chaos synchronization if the intensity of external chaotic signal is large enough. First of all, we use direct current modulation to achieve the chaos of VCSELs, and determine the laser＇s chaotic state by analyzing time series of the output and the corresponding power spectrum. And then we achieve synchronization of the two chaotic systems by external chaotic signal parameter modulation. We also find that the larger the modulation intensity is, the easier it is to achieve synchronization for chaotic VCSELs. This approach can also be applied to systems with a number of modulated lasers.

关键词： Lasers Power spectrum Pulse modulation Surface emitting lasers synchronization Time series

synchronization and Asynchronization in Two Coupled Excitable Systems

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2005年第3期43卷 459-465页

作者： YUANGuo-Yong ZHANGGuang-Cai WANGGuang-Rui CHENShi-Gang DepartmentofPhysics HebeiNormalUniversityShijiazhuang050016China／／GraduateSchooloftheChinaAcademyofEngineeringPhysicsP.O.Box2101Beijing100088China InstituteofAppliedPhysicsandComputationalMathematics P.O.Box8009Beijing100088China

The synchronization and asynchronization of two coupled excitable systems are investigated. The two systems with different initial configurations, which are separately a single spiral wave (or a travel wave) and the rest state, can be developed to the synchronizing state with the same spiral wave (or travel wave) in each system, when the coupling is very strong. Decreasing the coupling intensity, two rest states or two different configurations appear in the two systems. The qualitative analysis and interpretation are given.

关键词： excitable system spiral wave synchronization

synchronization of Robot Manipulators Actuated By Induction Motors with Velocity Estimator

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2019年第11期121卷 609-630页

作者： Felipe J.Torres Gerardo V.Guerrero Carlos D.García Ricardo Zavala-Yoe Mario A.García Adolfo R.López University of Guanajuato Division of Engineering Campus Irapuato-SalamancaCarretera Salamanca-Valle de Santiago km 3.5+1.8GuanajuatoSalamanca36885México National Technological of Mexico/National Center of Research and Technological Development Av.Palmira S/N colonia PalmiraMorelosCuernavaca62490México School of Engineering and Sciences Monterrey TechnologicalPuente 222 Ejidos de HuipulcoCiudad de México14380México Superior Technological Institute of Irapuato Carretera Irapuato-Silao km 12.5GuanajuatoIrapuato36821México

A complete modeling(including the actuator dynamics)of a robot manipulator that uses three-phase induction motors is presented in this paper.A control scheme is designed to synchronize robot manipulators actuated by induction motors under a masterslave scheme in the case where the joint velocity of the slave robots is *** of the research on the synchronization of robot manipulators assumes the use of ideal actuators to drive the joints;for that reason,in this work,a three-phase induction motor is considered to be a direct-drive actuator for each *** entire model of the mated system is obtained by a combination of the dynamics of the induction motor and robot ***,the synchronization control algorithm for a master-slave scheme in both the joint space and workspace of robot manipulators driven by induction motors is *** observer based on the entire model is proposed to estimate the joint velocity of the slave robot *** the Lyapunov criterion,a stability analysis of the synchronization control with a velocity estimator is *** analytical results show the synchronization and estimation errors are globally,uniformly,and ultimately *** with multiple robots demonstrate the performance of the proposed control algorithm.

关键词： synchronization robot manipulator induction motor Lyapunov stability observer based on the model

synchronization of home departure and arrival times in dual earner households with children:Panel regression model of time gaps

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2019年第5期6卷 504-513页

作者： Bilin Han Harry Timmermans Urban Planning Group Eindhoven University of Technology

Organizing schedules and allocating time to different activities is always a challenge in dual-earner households,especially when they have *** may need to link their schedule to those of their children to allow them escorting their children to school or to take care or be with their children at *** paper reports the results of an analysis of the degree of synchronization of home departure and arrival times in dual earner households with children,where the degree of synchronization is defined as the gap between departure and arrival times of a parent and *** activity-travel diary data of different household members,a random parameters regression model is estimated to examine differences in time gaps in home departure and arrival times between parents and children as a function of gender,day of the week,age of the youngest child,and other socio-demographic *** results of the analysis provide insight into factors influencing the degree of synchronization and coordination of double activity-travel scheduling decisions in households with *** indicate that gender,number of children in the household,age of the youngest child,travel within or outside peak hours,day of the week,transport mode used for the work commute and household income level significantly affect time gaps,especially arrival time gaps.

关键词： Home departure and arrival times synchronization Time gap Dual-earner households Random parameters panel regression model

synchronization in Triangled Complex Networks

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2006年第5期45卷 955-960页

作者： LU Xin-Biao LI Xiang WANG xiao-Fan Department of Automation Shanghai Jiao Tong University Shanghai 200240 China China Institute of Atomic Energy P.O. Box 275-81 Beijing 102413 China

Using a tunable clustering coeffcient model withoutchanging the degree distribution, we investigate the effect of clustering coefficient on synchronization of networks with both unweighted and weighted couplings. For several typical categories of complex networks, the more triangles are in the networks, the worse the synchronizability of the networks is.

关键词： synchronization weighted network clustering coefficient