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Bone adhesive with temporally-synchronized degradation for enhanced osteointegration 认领 引用
1
作者 Jun-ting Gu Zhi-ting Li +8 位作者 Yu-zhu Wang Dong-xiao Hao Gao-peng Dang Xiao-Qing Cao Franklin R.Tay Ji-hua Chen Conrado Aparicio Kai Jiao Li-na Niu 《Bone Research》 SCIE CAS CSCD 2026年第3期935-948,共14页
Bone adhesives have emerged as promising alternatives for complex fracture fixation.However,discrepancies between material degradation rates and the physiological timeline of bone healing remain a critical limitation.... Bone adhesives have emerged as promising alternatives for complex fracture fixation.However,discrepancies between material degradation rates and the physiological timeline of bone healing remain a critical limitation.Here,a polyurethane-based adhesive(TNC)was developed,synthesized from trimeric hexamethylene diisocyanate,nano-hydroxyapatite,and type I collagen.The TNC demonstrates strong initial adhesion to both wet and blood-contaminated bone surfaces and exhibits excellent biocompatibility.A distinguishing feature of TNC is its capacity to synchronize degradation with the stages of bone healing.During degradation,TNC forms a mineralized surface layer that releases calcium ions.The calcium ions activate cathepsin K,an enzyme integral to bone remodeling.This calcium-mediated mechanism accelerates TNC degradation by 1.9-fold during the remodeling phase compared to the initial phase.In a rat skull fracture model,TNC supported effective fracture stabilization and achieved favorable bone regeneration at 8 weeks after implantation.These findings demonstrate that TNC combines early mechanical stability with phasespecific degradability to facilitate bone regeneration in a temporally-controlled manner.The present work provides a framework for the development of bio-responsive bone adhesives that synchronize degradation behavior with healing phases for orthopedic applications. 展开更多
关键词 type i collagenthe fracture fixationhoweverdiscrepancies osteointegration trimeric hexamethylene diisocyanatenano hydroxyapatiteand temporally synchronized degradation polyurethane bone adhesives bone surfaces
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Multi-wavelength pulses in synchronized mode-locked fiber lasers 认领 引用
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作者 WU Qiong GAO Bo +8 位作者 ZHOU Lu-yao WEN Hong-lin QIAO Fei-hong WU Bing XU Ting LI Qi LI Ying-ying WU Ge LIU Lie 《中国光学（中英文）》 EI CAS CSCD 北大核心 2026年第2期445-453,共9页
We designed and investigated a passive synchronized mode-locked fiber laser.The device utilizes a dual-cavity structure driven by the nonlinear polarization rotation(NPR)mechanism.Stable mode-locking is attained by sy... We designed and investigated a passive synchronized mode-locked fiber laser.The device utilizes a dual-cavity structure driven by the nonlinear polarization rotation(NPR)mechanism.Stable mode-locking is attained by synergistically controlling gain,polarization state,and optical path length in two symmetric sub-cavities.Experiments proved that repetition rate of the sub-cavities can be adjusted via the time delay line(TDL)to achieve synchronized mode-locking.The system stably generates multi-wavelength pulses at a single repetition frequency,evidenced by multiple spectral peaks and equidistant pulse sequences.These findings facilitate the development of high-performance multi-wavelength ultrashort pulse sources,crucial for optical communications,spectral analysis,and remote sensing. 展开更多
关键词 synchronized mode-locked fiber laser multi-wavelength pulses dual-cavity
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GPS-Synchronized Monitoring of Core-Collapse Supernova Bursts with PandaX-4T via Coherent Elastic Neutrino-Nucleus Scattering 认领 引用
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作者 Binyu Pang Zihao Bo +109 位作者 Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Manna Deng Yingjie Fan Deqing Fang Xuanye Fu Zhixing Gao Yujie Ge Lisheng Geng Karl Giboni Xunan Guo Xuyuan Guo Zichao Guo Chencheng Han Ke Han Changda He Jinrong He Houqi Huang Junting Huang Yule Huang Ruquan Hou Xiangdong Ji Yonglin Ju Xiaorun Lan Chenxiang Li Jiafu Li Mingchuan Li Peiyuan Li Shuaijie Li Tao Li Yangdong Li Zhiyuan Li Qing Lin Jianglai Liu Yuanchun Liu Congcong Lu Xiaoying Lu Lingyin Luo Yunyang Luo Yugang Ma Yajun Mao Yue Meng Ningchun Qi Zhicheng Qian Xiangxiang Ren Dong Shan Xiaofeng Shang Xiyuan Shao Guofang Shen Manbin Shen Wenliang Sun Xuyan Sun Yi Tao Yueqiang Tian Yuxin Tian Anqing Wang Guanbo Wang Hao Wang Haoyu Wang Jiamin Wang Lei Wang Meng Wang Qiuhong Wang Shaobo Wang Shibo Wang Siguang Wang Wei Wang Xu Wang Zhou Wang Yuehuan Wei Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Kaizhi Xiong Jianqin Xu Yifan Xu Shunyu Yao Binbin Yan Xiyu Yan Yong Yang Peihua Ye Chunxu Yu Ying Yuan Zhe Yuan Youhui Yun Xinning Zeng Minzhen Zhang Peng Zhang Shibo Zhang Siyuan Zhang Shu Zhang Tao Zhang Wei Zhang Yang Zhang Yingxin Zhang Yuanyuan Zhang Li Zhao Kangkang Zhao Jifang Zhou Jiaxu Zhou Jiayi Zhou Ning Zhou Xiaopeng Zhou Zhizhen Zhou Chenhui Zhu PandaX Collaboration 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第2期367-373,共7页
The landmark detection of neutrinos from SN1987A marked the dawn of neutrino astrophysics.The neutrino burst provided essential insights into fundamental properties of neutrinos and served as key probes of stellar evo... The landmark detection of neutrinos from SN1987A marked the dawn of neutrino astrophysics.The neutrino burst provided essential insights into fundamental properties of neutrinos and served as key probes of stellar evolution and supernova dynamics.The recent advancement in coherent elastic neutrino-nucleus scattering enables the detection of core-collapse supernova burst neutrinos using tonne-scale liquid xenon detectors originally designed for dark matter direct detection.Leveraging this capability,we developed and deployed an online supernova monitoring system for the PandaX-4T experiment.This system features a GPS module with millisecond-level timing precision,a low false-alarm rate,and high sensitivity to galactic core-collapse supernova explosion events.The methodology is robust,directly scalable,and planned for implementation in the next-generation PandaX-20T experiment. 展开更多
关键词 dark matter direct detectionleveraging GPS synchronized monitoring neutrino astrophysics dark matter direct detection core collapse supernova supernova monitoring system PandAX t coherent elastic neutrino nucleus scattering
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Defect Analysis and Innovation Design of Synchronizer for Clutchless Automatic Mechanical Transmission 认领 引用 被引量：2
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作者 Lipeng Zhang Yunao Peng +1 位作者 Haojie Yang Shaohua Li 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2022年第1期238-254,共17页
The synchronizer is a key component of automatic mechanical transmission(AMT)equipped in electric vehicles,but the inertial lock-ring synchronizer(ILRS)commonly used there is not suitable especially for pure electric ... The synchronizer is a key component of automatic mechanical transmission(AMT)equipped in electric vehicles,but the inertial lock-ring synchronizer(ILRS)commonly used there is not suitable especially for pure electric vehicles without a clutch because of big shift impact.To make the shifting process rapid and smooth,a new synchronizer named pressure-controllable friction ring synchronizer(PCFRS)was designed.Initially,the inevitable shortcoming of ILRS was verified by simulation and test.Furthermore,the mechanical characteristics and advantages of the new synchronizer over ILRS were analyzed.Then,the formulations describing the dynamic transmission based on the working mechanism of the PCFRS were established.Finally,the shifting simulation results with PCFRS and ILRS based on the same operating conditions were compared and analyzed.The research shows that the PCFRS can meet the main shifting evaluation index of an AMT without complex control methods,as well as it takes only 0.2406 s to finish the comfortable and zero-speed-difference shifting.The shifting quality of PCFRS is better than that of the ILRS.It lays a foundation for using the new synchronizer as a part of clutchless AMTs equipped in pure electric vehicles. 展开更多
关键词 Electric vehicle Clutchless automatic mechanical transmission Inertial lock-ring synchronizer Pressure-controllable friction ring synchronizer Mechanical characteristics Shifting quality
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Method to Improve the Tracking Speed of the Early-Late Synchronizer 认领 引用 被引量：1
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作者 安建平 王君 《Journal of Beijing Institute of Technology》 EI CAS 2006年第2期190-194,共5页
A new early-late synchronizer is proposed to improve tracking speed. The performance of the traditional early-late synchronizer is analyzed in detail, the result shows that the different location and length of integra... A new early-late synchronizer is proposed to improve tracking speed. The performance of the traditional early-late synchronizer is analyzed in detail, the result shows that the different location and length of integral period can influence the discriminator characteristic, an improved integral structure is provided which can tracking the synchronization error better. According to the good tracking performance of Kalman filter, a new loop filter is designed. The new early-late synchronizer adopts both the new integral structure and the new loop filter. The analysis with loop theory and simulation results in Simulink show that the new bit synchronizer possesses higher tracking speed than the traditional early-late synchronizer. 展开更多
关键词 bit synchronizer early-late synchronizer loop filter
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Pinning-controlled synchronization of complex networks with bounded or unbounded synchronized regions 认领 引用 被引量：5
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作者 邹艳丽 陈关荣 《Chinese Physics B》 SCIE EI CAS 2009年第8期3337-3346,共10页
This paper studies pinning-controlled synchronization of complex networks with bounded or unbounded synchronized regions. To study a state-feedback pinning-controlled network with N nodes, it first converts the contro... This paper studies pinning-controlled synchronization of complex networks with bounded or unbounded synchronized regions. To study a state-feedback pinning-controlled network with N nodes, it first converts the controlled network to an extended network of N＋1 nodes without controls. It is shown that the controlled synchronizability of the given network is determined by the real part of the smallest nonzero eigenvalue of the coupling matrix of its extended network when the synchronized region is unbounded; but it is determined by the ratio of the real parts of the largest and the smallest nonzero eigenvalues of the coupling matrix when the synchronized region is bounded. Both theoretical analysis and numerical simulation show that the portion of controlled nodes has no critical values when the synchronized region is unbounded, but it has a critical value when the synchronized region is bounded. In the former case, therefore, it is possible to control the network to achieve synchronization by pinning only one node. In the latter case, the network can achieve controlled synchronization only when the portion of controlled nodes is larger than the critical value. 展开更多
关键词 synchronization pinning control complex network synchronized region
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Mechanism of interconnected synchronized switch damping for vibration control of blades 认领 引用 被引量：1
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作者 Yu FAN Yu HU +1 位作者 Yaguang WU Lin LI 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第8期207-228,共22页
The Synchronized Switch Damping(SSD)is regarded as a promising alternative to mitigate the vibration of thin-walled structures in aero-engines,especially for blades or bladed disks.The common manner is to shunt the sw... The Synchronized Switch Damping(SSD)is regarded as a promising alternative to mitigate the vibration of thin-walled structures in aero-engines,especially for blades or bladed disks.The common manner is to shunt the switch circuit independently to a single piezoelectric structure.This paper is aimed at exploring a novel way of using the SSD,i.e.,the SSD is interconnected between two piezoelectric structures or substructures.The damping mechanism,performance,and effective range of the interconnected SSD are studied numerically and experimentally.First,based on a dual cantilever beam finite element model,the time domain and frequency domain modeling and solving methods of the interconnected SSD are deduced and validated.Then,the influence of the amplitude and phase relationship on the damping effect of the interconnected SSD is numerically studied and compared with the shunted SSD.A self-sensing SSD control board is developed,and experimental studies are carried out.The results show that the interconnected SSD establishes an additional energy channel between the corresponding piezoelectric structures.When the amplitudes of the two cantilever beams are different,the interconnected SSD balances the vibration level of each beam.When the amplitudes of the two cantilever beams are the same,if the appropriate interconnection manner is selected according to the phase,the resonance peak can be reduced by more than 30%.When the vibration is in-phase/out-of-phase,the damping generated by the interconnected SSD in a cross/parallel manner is even more significant than the shunted SSD.Furthermore,this novel connection scheme reduces the number of SSD circuits in half.Finally,for engineering applications,we implement the proposed damping technology to the finite element model of a typical dummy bladed disk.A piezoelectric damping ratio of 13.7%is achieved when the amount of piezo material is only 10%of blade mass.Compared with traditional friction dampers,the major advancements of the interconnected SSD are:(A)it can reduce the vibration level of blades without friction interface;(B)the space constraint is overcome,i.e.,the vibration energy is not necessarily dissipated independently in one sector or through physically adjacent blades,and instead,the dissipation and transfer of vibrational energy can be realized between any blade pair.If a specific gating circuit is adopted to adjust the interconnection manner of the SSD,vibration mitigation under variable working conditions with different engine orders will be expected;(C)designers do not need to worry about the annoying nonlinearities related to working conditions anymore. 展开更多
关键词 Blade Dry friction damping Experiments Finite element method Piezoelectric Synchronized switch damping
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Taboo Search Algorithm for Item Assignment in Synchronized Zone Automated Order Picking System 认领 引用 被引量：2
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作者 WU Yingying WU Yaohua 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第4期860-866,共7页
The idle time which is part of the order fulfillment time is decided by the number of items in the zone; therefore the item assignment method affects the picking efficiency. Whereas previous studies only focus on the ... The idle time which is part of the order fulfillment time is decided by the number of items in the zone; therefore the item assignment method affects the picking efficiency. Whereas previous studies only focus on the balance of number of kinds of items between different zones but not the number of items and the idle time in each zone. In this paper, an idle factor is proposed to measure the idle time exactly. The idle factor is proven to obey the same vary trend with the idle time, so the object of this problem can be simplified from minimizing idle time to minimizing idle factor. Based on this, the model of item assignment problem in synchronized zone automated order picking system is built. The model is a form of relaxation of parallel machine scheduling problem which had been proven to be NP-complete. To solve the model, a taboo search algorithm is proposed. The main idea of the algorithm is minimizing the greatest idle factor of zones with the 2-exchange algorithm. Finally, the simulation which applies the data collected from a tobacco distribution center is conducted to evaluate the performance of the algorithm. The result verifies the model and shows the algorithm can do a steady work to reduce idle time and the idle time can be reduced by 45.63% on average. This research proposed an approach to measure the idle time in synchronized zone automated order picking system. The approach can improve the picking efficiency significantly and can be seen as theoretical basis when optimizing the synchronized automated order picking systems. 展开更多
关键词 taboo search algorithm synchronized zone order picking idle time idle factor
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On the modeling of synchronized flow in cellular automaton models 认领 引用 被引量：2
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作者 金诚杰 王炜 姜锐 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第2期320-326,共7页
In this paper, we further analyze our cellular automaton （CA） traffic flow model. By changing some parameters, the characteristics of our model can be significantly varied, ranging from the features of phase transit... In this paper, we further analyze our cellular automaton （CA） traffic flow model. By changing some parameters, the characteristics of our model can be significantly varied, ranging from the features of phase transitions to the number of traffic phases. We also review the other CA models based on Kerner＇s three-phase traffic theory. By comparisons, we find that the core concepts for modeling the synchronized flow in these models are similar. Our model can be a good candidate for modeling the synchronized flow, since there is enough flexibility in our framework. 展开更多
关键词 traffic flow cellular automaton synchronized flow three-phase traffic theory
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Multi-well wavelet-synchronized inversion based on particle swarm optimization 认领 引用
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作者 Yuan Huan Yuan San-Yi +3 位作者 Su Qin Wang Hong-Qiu Zeng Hua-Hui Yue Shi-Jun 《Applied Geophysics》 SCIE CSCD 2024年第4期728-739,879,880,共12页
Wavelet estimation is an important part of high-resolution seismic data processing.However,itis difficult to preserve the lateral continuity of geological structures and eff ectively recover weak geologicalbodies usin... Wavelet estimation is an important part of high-resolution seismic data processing.However,itis difficult to preserve the lateral continuity of geological structures and eff ectively recover weak geologicalbodies using conventional deterministic wavelet inversion methods,which are based on the joint inversionof wells with seismic data.In this study,starting from a single well,on the basis of the theory of single-welland multi-trace convolution,we propose a steady-state seismic wavelet extraction method for synchronizedinversion using spatial multi-well and multi-well-side seismic data.The proposed method uses a spatiallyvariable weighting function and wavelet invariant constraint conditions with particle swarm optimization toextract the optimal spatial seismic wavelet from multi-well and multi-well-side seismic data to improve thespatial adaptability of the extracted wavelet and inversion stability.The simulated data demonstrate that thewavelet extracted using the proposed method is very stable and accurate.Even at a low signal-to-noise ratio,the proposed method can extract satisfactory seismic wavelets that refl ect lateral changes in structures andweak eff ective geological bodies.The processing results for the field data show that the deconvolution resultsimprove the vertical resolution and distinguish between weak oil and water thin layers and that the horizontaldistribution characteristics are consistent with the log response characteristics. 展开更多
关键词 particle swarm optimization synchronized inversion wavelet estimation spatial adaptability weak eff ective signal
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Photodetection-induced relative timing jitter in synchronized time-lens source for coherent Raman scattering microscopy 认领 引用
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作者 Jiaqi Wang Ping Qiu 《Journal of Innovative Optical Health Sciences》 SCIE EI 2017年第5期69-76,共8页
Synchronized time lens source is a novel method to generate synchronized optical pulses to mode-locked lasers,and has found widespread applications in coberent Raman scattering microscopy.Relative timing jitter betwee... Synchronized time lens source is a novel method to generate synchronized optical pulses to mode-locked lasers,and has found widespread applications in coberent Raman scattering microscopy.Relative timing jitter between the mode-locked laser and the synchronized time-lens source is a key parameter for evaluating the synchronization peformance of such synchronized laser sys-tems.However,the origins of the relative timing jitter in such systens are not fully determined,which in turn prevents the experimental efforts to optimize the synchronization perfornance.Here,we demonstrate,through theoretical modeling and mumerical simulation,that the photo-detction could be one physical origin of the relative timing jitter.Comparison with relative timing jitter due to the intrinsic timing jitter of the mode-locked laser is also demonstrated,revealing different qualitative and quantitative behavios.Based on the nature of this photo-detection-induced timing jitter,we further propose several strategies to reduce the relative timing jitter.Our thoretical results will provide guidelines for optimizing synchronization performance in experiments. 展开更多
关键词 Synchronized time-lens source coherent Raman sca tering microscopy
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A Laser Scanner-Stage Synchronized System Supporting the Large-Area Precision Polishing of Additive-Manufactured Metallic Surfaces 认领 引用 被引量：2
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作者 Mengjia Cui Libin Lu +1 位作者 Zhen Zhang Yingchun Guan 《Engineering》 SCIE EI CAS CSCD 2021年第12期1732-1740,共9页
This paper proposes a scanner–stage synchronized approach emphasizing a novel control structure for the laser polishing of Inconel 718 components manufactured by selective laser melting in order to address increasing... This paper proposes a scanner–stage synchronized approach emphasizing a novel control structure for the laser polishing of Inconel 718 components manufactured by selective laser melting in order to address increasing demands for high surface quality in metal additive manufacturing.The proposed synchronized control system is composed of a motion decomposition module and an error synthesis module.The experimental results show that stitching errors can be avoided thanks to continuous motion during laser processing.Moreover,in comparison with the existing step-scan method,the processing efficiency of the proposed method is improved by 38.22%and the surface quality of the laser-polished area is significantly enhanced due to a more homogeneous distribution of the laser energy during the material phase change.The proposed synchronized system paves the way for high-speed,high-precision,and large-area laser material processing without stitching errors. 展开更多
关键词 Laser polishing Stitching errors Synchronized control system Additive manufacturing
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Characteristics of synchronized traffic in mixed traffic flow 认领 引用 被引量：3
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作者 宁宏新 薛郁 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第4期171-178,共8页
In this paper, the characteristics of synchronized traffic in mixed traffic flow are investigated based on the braking light model. By introducing the energy dissipation and the distribution of slowdown vehicles, the ... In this paper, the characteristics of synchronized traffic in mixed traffic flow are investigated based on the braking light model. By introducing the energy dissipation and the distribution of slowdown vehicles, the effects of the maximum velocity, the mixing ratio, and the length of vehicles on the synchronized flow are discussed. It is found that the maximum velocity plays a great role in the synchronized flow in mixed traffic. The energy dissipation and the distribution of slowdown vehicles in the synchronized flow region are greatly different from those in free flow and a traffic jamming region. When all of vehicles have the same maximum velocity with Vmax 〉 15, the mixed traffic significantly displays synchronized flow, which has been demonstrated by the relation between flow rate and occupancy and estimation of the cross-correlation function. Moreover, the energy dissipation in the synchronized flow region does not increase with occupancy. The distribution of slowdown vehicles shows a changeless platform in the synchronized flow region. This is an interesting phenomenon. It helps to deeply understand the synchronized flow and greatly reduce the energy dissipation of traffic flow. 展开更多
关键词 cellular automata synchronized flow mixed traffic flow energy dissipation
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基于Java synchronized同步锁实现线程交互 认领 引用 被引量：3
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作者 崔政 段利国 《软件工程》 2018年第2期1-3,共3页
Java多线程能够提高CPU利用效率,但也容易造成线程不安全、线程死锁等问题。本文详细介绍了Java线程各状态之间的关系及其切换,并用实例展示了使用同步锁synchronized保证同一时刻只有一个线程操作同一资源,使用wait()、notify()切换线... Java多线程能够提高CPU利用效率,但也容易造成线程不安全、线程死锁等问题。本文详细介绍了Java线程各状态之间的关系及其切换,并用实例展示了使用同步锁synchronized保证同一时刻只有一个线程操作同一资源,使用wait()、notify()切换线程状态保证线程操作的前后顺序实现线程交互。理解Java线程各状态之间的关系及其切换,能帮助用户在使用Java多线程的场景有效避免多线程带来的不安全问题。 展开更多
关键词 多线程 synchronized 线程交互
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MEMS Huygens Clock Based on Synchronized Micromechanical Resonators 认领 引用 被引量：5
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作者 Xueyong Wei Mingke Xu +6 位作者 Qiqi Yang Liu Xu a Yonghong Qi Ziming Ren Juan Ren Ronghua Huan Zhuangde Jiang 《Engineering》 SCIE EI CAS CSCD 2024年第5期124-131,共8页
With the continuous miniaturization of electronic devices,microelectromechanical system(MEMS)oscillators that can be combined with integrated circuits have attracted increasing attention.This study reports a MEMS Huyg... With the continuous miniaturization of electronic devices,microelectromechanical system(MEMS)oscillators that can be combined with integrated circuits have attracted increasing attention.This study reports a MEMS Huygens clock based on the synchronization principle,comprising two synchronized MEMS oscillators and a frequency compensation system.The MEMS Huygens clock improved shorttime stability,improving the Allan deviation by a factor of 3.73 from 19.3 to 5.17 ppb at 1 s.A frequency compensation system based on the MEMS oscillator’s temperature-frequency characteristics was developed to compensate for the frequency shift of the MEMS Huygens clock by controlling the resonator current.This effectively improved the long-term stability of the oscillator,with the Allan deviation improving by 1.6343105 times to 30.9 ppt at 6000 s.The power consumption for compensating both oscillators simultaneously is only 2.85 mW·℃-1.Our comprehensive solution scheme provides a novel and precise engineering solution for achieving high-precision MEMS oscillators and extends synchronization applications in MEMS. 展开更多
关键词 Frequency stability Huygens clock MEMS Oscillator Synchronization
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Analysis of a phase synchronized functional network based on the rhythm of brain activities 认领 引用 被引量：11
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作者 李凌 金贞兰 李斌 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第3期512-518,共7页
Rhythm of brain activities represents oscillations of postsynaptic potentials in neocortex, therefore it can serve as an indicator of the brain activity state. In order to check the connectivity of brain rhythm, this ... Rhythm of brain activities represents oscillations of postsynaptic potentials in neocortex, therefore it can serve as an indicator of the brain activity state. In order to check the connectivity of brain rhythm, this paper develops a new method of constructing functional network based on phase synchronization. Electroencephalogram （EEG） data were collected while subjects looking at a green cross in two states, performing an attention task and relaxing with eyes-open. The EEG from these two states was filtered by three band-pass filters to obtain signals of theta （4-7 Hz）, alpha （8-13 Hz） and beta （14-30 Hz） bands. Mean resultant length was used to estimate strength of phase synchronization in three bands to construct networks of both states, and mean degree K and cluster coefficient C of networks were calculated as a function of threshold. The result shows higher cluster coetticient in the attention state than in the eyes-open state in all three bands, suggesting that cluster coefficient reflects brain state. In addition, an obvious fronto-parietal network is found in the attention state, which is a well-known attention network. These results indicate that attention modulates the fronto-parietal connectivity in different modes as compared with the eyes-open state. Taken together this method is an objective and important tool to study the properties of neural networks of brain rhythm, 展开更多
关键词 electroencephalogram phase synchronization rhythm functional brain network
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Taming desynchronized bursting with delays in the Macaque cortical network 认领 引用 被引量：4
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作者 王青云 Murks Aleksandra +1 位作者 Perc Matjaz 陆启韶 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第4期117-122,共6页
Inhibitory coupled bursting Hindmarsh-Rose neurons are considered as constitutive units of the Macaque corti- cal network. In the absence of information transmission delay the bursting activity is desynchronized, givi... Inhibitory coupled bursting Hindmarsh-Rose neurons are considered as constitutive units of the Macaque corti- cal network. In the absence of information transmission delay the bursting activity is desynchronized, giving rise to spatiotemporally disordered dynamics. This paper shows that the introduction of finite delays can lead to the synchro- nization of bursting and thus to the emergence of coherent propagating fronts of excitation in the space-time domain. Moreover, it shows that the type of synchronous bursting is uniquely determined by the delay length, with the transi- tions from one type to the other occurring in a step-like manner depending on the delay. Interestingly, as the delay is tuned close to the transition points, the synchronization deteriorates, which implies the coexistence of different bursting attractors. These phenomena can be observed by different but fixed coupling strengths, thus indicating a new role for information transmission delays in realistic neuronal networks. 展开更多
关键词 synchronization bursting information transmission delay Macaque cortical network inhibitory coupling
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CAN-based Synchronized Motion Control for Induction Motors 认领 引用 被引量：10
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作者 Jun Ren Chun-Wen Li De-Zong Zhao 《International Journal of Automation and computing》 2009年第1期55-61,共7页
A control area network(CAN)based multi-motor synchronized motion control system with an advanced synchronized control strategy is proposed.The strategy is to incorporate the adjacent cross-coupling control strategy in... A control area network(CAN)based multi-motor synchronized motion control system with an advanced synchronized control strategy is proposed.The strategy is to incorporate the adjacent cross-coupling control strategy into the sliding mode control architecture.As illustrated by the four-induction-motor-based experimental results,the multi-motor synchronized motion control system,via the CAN bus,has been successfully implemented.With the employment of the advanced synchronized motion control strategy,the synchronization performance can be significantly improved. 展开更多
关键词 Multi-motor motion control system speed synchronization adjacent cross-coupling control sliding mode control CANbus.
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Design and development of a synchronized operation control system for Thomson scattering diagnostic on J-TEXT 认领 引用
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作者 Jingjun ZHOU Li GAO +2 位作者 Yinan ZHOU Jiefeng HUANG Ge ZHUANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2018年第8期1-5,共5页
A Thomson scattering diagnostic system is under construction at the Joint Texas Experimental Tokamak（J-TEXT）. A 1064 nm Nd：YAG laser with 50 Hz repetition rate is used as the laser source. We have used a software f... A Thomson scattering diagnostic system is under construction at the Joint Texas Experimental Tokamak（J-TEXT）. A 1064 nm Nd：YAG laser with 50 Hz repetition rate is used as the laser source. We have used a software for careful and precise control of the laser through serial communication. A time sequence operating system has been developed to synchronize the laser control and data acquisition system with the central control system（CSS）. The system operates commands from the CSS of J-TEXT and generates triggers for the laser and data acquisition system in the proper sequence. It also measures an asynchronous time value that is needed for accurate time stamping. All functions are served by a field-programmable gate array development platform that is suitable for high-speed data and signal processing applications.Several embedded peripherals, including Ethernet and USB 2.0, provide communication with the CSS and the server. 展开更多
关键词 Thomson scattering diagnostic laser control synchronized operation
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Nonsingular terminal sliding mode approach applied to synchronize chaotic systems with unknown parameters and nonlinear inputs 认领 引用 被引量：3
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作者 Mohammad Pourmahmood Aghababa Hassan Feizi 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第6期107-116,共10页
This paper deals with the design of a novel nonsingular terminal sliding mode controller for finite-time synchro-nization of two different chaotic systems with fully unknown parameters and nonlinear inputs. We propose... This paper deals with the design of a novel nonsingular terminal sliding mode controller for finite-time synchro-nization of two different chaotic systems with fully unknown parameters and nonlinear inputs. We propose a novel nonsingular terminal sliding surface and prove its finite-time convergence to zero. We assume that both the master＇s and the slave＇s system parameters are unknown in advance. Proper adaptation laws are derived to tackle the unknown parameters. An adaptive sliding mode control law is designed to ensure the existence of the sliding mode in finite time. We prove that both reaching and sliding mode phases are stable in finite time. An estimation of convergence time is given. Two illustrative examples show the effectiveness and usefulness of the proposed technique. It is worthwhile noticing that the introduced nonsingular terminal sliding mode can be applied to a wide variety of nonlinear control problems. 展开更多
关键词 nonsingular terminal sliding mode finite-time synchronization uncertain parameter,nonlinear input
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