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Research on the Model of a Lightweight Resource Addressing

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Chinese Journal of Electronics 2015年第4期24卷 832-836页

作者： LUO Bingqing SUN Zhixin college of internet of things Nanjing University of Posts and Telecommunications

This paper discussed the characteristics of addressing from the perspective of internet addressing mechanism. An internet of things(IOT) resource addressing iteration model was defined. In the model, a direct addressing mode for active nodes and an indirect addressing mode for passive codes were proposed, which meet the requirement for multiple encoding mode. A unified IOT resource lightweight addressing scheme based on IPv6 has been proposed to implement the two addressing modes. The scheme utilized the virtual domain to solve the problem of the heterogeneous encoding. The paper implemented the addressing process from the internet host to the sensor node based on IPv6 over low-power wireless personal area networks(6Lo WPAN) protocol. The experiment results show that the scheme is performed to realize communication between wireless sensor networks and IPv6 networks.

关键词： Addressing Lightweight IPv6 networks Iteration model Unified addressing scheme

Effect of porous surface layer on wave propagation in elastic cylinder immersed in fluid

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Chinese Physics B 2023年第1期32卷 340-353页

作者：苏娜娜韩庆邦单鸣雷殷澄 college of internet of things Engineering Hohai UniversityChangzhou 213022China

To study the damage to an elastic cylinder immersed in fluid, a model of an elastic cylinder wrapped with a porous medium immersed in fluid is designed. This structure can both identify the properties of guided waves in a more practical model and address the relationship between the cylinder damage degree and the surface and surrounding medium. The principal motivation is to perform a detailed quantitative analysis of the longitudinal mode and flexural mode in an elastic cylinder wrapped with a porous medium immersed in fluid. The frequency equations for the propagation of waves are derived each for a pervious surface and an impervious surface by employing Biot theory. The influences of the various parameters of the porous medium wrapping layer on the phase velocity and attenuation are discussed. The results show that the influences of porosity on the dispersion curves of guided waves are much more significant than those of thickness,whereas the phase velocity is independent of the static permeability. There is an apparent “mode switching” between the two low-order modes. The characteristics of attenuation are in good agreement with the results from the dispersion *** work can support future studies for optimizing the theory on detecting the damage to cylinder or pipeline.

关键词： wave propagation porous surface layer dispersion attenuation

Multiple extended target tracking algorithm based on Gaussian surface matrix

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Journal of Systems Engineering and Electronics 2016年第2期27卷 279-289页

作者： Jinlong Yang Peng Li Zhihua Li Le Yang School of internet of things Engineering Jiangnan University

In this paper, we consider the problem of irregular shapes tracking for multiple extended targets by introducing the Gaussian surface matrix（GSM） into the framework of the random finite set（RFS） theory. The Gaussian surface function is constructed first by the measurements, and it is used to define the GSM via a mapping function. We then integrate the GSM with the probability hypothesis density（PHD） filter, the Bayesian recursion formulas of GSM-PHD are derived and the Gaussian mixture implementation is employed to obtain the closed-form solutions. Moreover, the estimated shapes are designed to guide the measurement set sub-partition, which can cope with the problem of the spatially close target tracking. Simulation results show that the proposed algorithm can effectively estimate irregular target shapes and exhibit good robustness in cross extended target tracking.

关键词： multiple extended target tracking irregular shape Gaussian surface matrix(GSM) probability hypothesis density(PHD)

Fault-tolerant finite-time dynamical consensus of double-integrator multi-agent systems with partial agents subject to synchronous self-sensing function failure

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Chinese Physics B 2022年第12期31卷 719-725页

作者： Zhi-Hai Wu Lin-Bo Xie Engineering Research Center of internet of things Technology Applications of MOE School of Internet of Things EngineeringJiangnan UniversityWuxi 214122China

This paper investigates fault-tolerant finite-time dynamical consensus problems of double-integrator multi-agent systems(MASs)with partial agents subject to synchronous self-sensing function failure(SSFF).A strategy of recovering the connectivity of network topology among normal agents based on multi-hop communication and a fault-tolerant finitetime dynamical consensus protocol with time-varying gains are proposed to resist synchronous *** is proved that double-integrator MASs with partial agents subject to synchronous SSFF using the proposed strategy of network topology connectivity recovery and fault-tolerant finite-time dynamical consensus protocol with the proper time-varying gains can achieve finite-time dynamical *** simulations are given to illustrate the effectiveness of the theoretical results.

关键词： multi-agent systems synchronous self-sensing function failure finite-time dynamical consensus network topology connectivity recovery

Robust Control Strategy of Gradient Magnetic Drive for Microrobots Based on Extended State Observer

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Cyborg and Bionic Systems 2022年第1期2022卷 210-220页

作者： Jiawei Lu Yueyue Liu Wentao Huang Kaitao Bi Yixin Zhu Qigao Fan college of internet of things Engineering Jiangnan UniversityWuxi 214000China

Microrobots have great application pot ential in the biomedical field,to realize the precision and eficiency of microrobots in vivo is research focus in this *** are accompanied by various disturbances in complex *** disturbances will affect the motion control of microrobots,resulting in the inability of the micromanipulation tasks to be completed *** this end,a robust motion control method is proposed for precise path tracking of microrobots in this *** extended state observer(ESO)is used to estimate the total disturbances and uncertainties of the system.A path tracking controller is designed by combining sliding mode control(SMC)and disturbances compensation,which is used to eliminate the total disturbances of the system and realize the fast and accurate path tracking of ***,the path tracking experiments are implemented in the gradient magnetic field drive *** experimental results show that the mean absolute error of the path tracking for microrobots in a simulated vascular structure is less than 14μm,and the root mean square error is less than 17 um by using the robust control method proposed in this *** with the traditional PID control method,it can better suppress external disturbances and uncertainties of the system and improve the path tracking accuracy of microrobots *** shows stronger anti interference ability and robustness.

关键词： Observer system Strategy

Comparison of two gap-metric-based weighting methods in multilinear model control 36

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Comparison of two gap-metric-based weighting methods in mult...

Investigation of cavitation bubble collapse near rigid boundary by lattice Boltzmann method

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作者： Jingjing Du college of internet of things Engineering Hohai Universtiy

ISBN: (纸本)9781538629185

A 1/δ gap metric based weighting method is proposed for multilinear model control of nonlinear systems, in which the gap metric is employed to formulate weighting functions for local controller combination. Comparisons between the proposed weighting method and another 1-δ gap metric based weighting method have been made. A CSTR system is studied to demonstrate the effectiveness of the proposed weighting method. Simulations demonstrate that the proposed weighting method has all the advantages of the 1-δ weighting method. But it is more effective than the 1-δ gap weighting method, and more sensitive to the tuning parameters, making it much easier to apply.

关键词： multilinear model control gap metric weighting function nonlinear system

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Journal of Hydrodynamics 2016年第3期28卷 442-450页

作者：单鸣雷朱昌平周曦殷澄韩庆邦 college of internet of things Engineering and Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology Hohai University

The dynamics of the bubble collapse near a rigid boundary is a fundamental issue for the bubble collapse application and prevention. In this paper, the bubble collapse is modeled by adopting the lattice Boltzmann method （LBM） and is verified, and then the dynamic characteristics of the collapsing bubble with the second collapse is investigated. The widely used Shan-Chen model in the LBM multiphase community is modified by coupling with the Carnahan-Starling equation of state （C-S EOS） and the exact difference method （EDM） for the forcing term treatment. The simulation results of the bubble profile evolution by the LBM are in excellent agreements with the theoretical and experimental results. From the two-dimensional pressure field evolution, the dynamic characteristics of the different parts during the bubble collapse stage are studied. The role of the second collapse in the rigid boundary damage is discussed, and the impeding effect between two collapses is demonstrated.

关键词： cavitation mechanics lattice Boltzmarm method bubble collapse rigid boundary

CCI-based link quality estimation mechanism for wireless sensor networks under non-perceived packet loss

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The Journal of China Universities of Posts and Telecommunications 2013年第1期20卷 1-10页

作者： SHU Jian TAO Juan LIU Lin-lan CHEN Ye-bin ZANG Chao internet of things Technology Institute School of Software Nanchang Hangkong University internet of things Technology Institute School of Information Engineering Nanchang Hangkong University

This paper proposes a chip correlation indicator （CCI）-based link quality estimation mechanism for wireless sensor networks under non-perceived packet loss. On the basis of analyzing all related factors, it can be concluded that signal-to-noise rate （SNR） is the main factor causing the non-perceived packet loss. In this paper, the relationship model between CCI and non-perceived packet loss rate （NPLR） is established from related models such as SNR versus packet success rate （PSR）, CCI versus SNR and CCI-NPLR. Due to the large fluctuating range of the raw CCI, Kalman filter is introduced to do de-noising of the raw CCI. The cubic model and the least squares method are employed to fit the relationship between CCI and SNR. In the experiments, many groups of comparison have been conducted and the results show that the proposed mechanism can achieve more accurate measurement of the non-perceived packet loss than existing approaches. Moreover, it has the advantage of decreasing extra energy consumption caused by sending large number of probe packets.

关键词： wireless sensor network link quality estimation non-perceived packet loss CCI SNR Kalman filter

Pseudopotential multi-relaxation-time lattice Boltzmann model for cavitation bubble collapse with high density ratio

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Chinese Physics B 2016年第10期25卷 189-196页

作者：单鸣雷朱昌平姚澄殷澄蒋小燕 college of internet of things Engineering Hohai University Jiangsu Key Laboratory of Power Transmission and Distribution Equipment Technology Hohai University

The dynamics of the cavitation bubble collapse is a fundamental issue for the bubble collapse application and prevention. In the present work, the modified forcing scheme for the pseudopotential multi-relaxation-time lattice Boltzmann model developed by Li Q et al. [ Li Q, Luo K H and Li X J 2013 Phys. Rev. E 87 053301] is adopted to develop a cavitation bubble collapse model. In the respects of coexistence curves and Laplace law verification, the improved pseudopotential multi-relaxation-time lattice Boltzmann model is investigated. It is found that the thermodynamic consistency and surface tension are independent of kinematic viscosity. By homogeneous and heterogeneous cavitation simulation, the ability of the present model to describe the cavitation bubble development as well as the cavitation inception is verified. The bubble collapse between two parallel walls is simulated. The dynamic process of a collapsing bubble is consistent with the results from experiments and simulations by other numerical methods. It is demonstrated that the present pseudopotential multirelaxation-time lattice Boltzmann model is applicable and efficient, and the lattice Boltzmann method is an alternative tool for collapsing bubble modeling.

关键词： lattice Boltzmann method pseudopotential model bubble collapse improved forcing scheme