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Editorial

The Journal of China Universities of Posts and Telecommunications 2023年第6期30卷 1-2页

作者： jiang guoping Chen Guanrong Nanjing University of Posts and Telecommunications Nanjing 210003China City University of Hong Kong Hong Kong 999077China

Complex dynamical networks have emerged as powerful tools for studying the characteristics and evolutions of various real-world social and engineering networks,such as multi-agent systems,power grids,biological networks,and epidemic *** study of complex dynamical networks is crucial for understanding complex systems and provides a solid theoretical foundation for network science and engineering.

关键词： networks network agent

Local Bifurcation Analysis of a Delayed Fractional-order Dynamic Model of Dual Congestion Control Algorithms

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 361-369页

作者： Min Xiao guoping jiang Jinde Cao Weixing Zheng IEEE College of Automation Nanjing University of Posts and Telecommunications Research Center for Complex Systems and Network Sciences Southeast University School of Computing Engineering and MathematicsWestern Sydney University

In this paper, we propose a delayed fractional-order congestion control model which is more accurate than the original integer-order model when depicting the dual congestion control algorithms. The presence of fractional orders requires the use of suitable criteria which usually make the analytical work so harder. Based on the stability theorems on delayed fractionalorder differential equations, we study the issue of the stability and bifurcations for such a model by choosing the communication delay as the bifurcation parameter. By analyzing the associated characteristic equation, some explicit conditions for the local stability of the equilibrium are given for the delayed fractionalorder model of congestion control algorithms. Moreover, the Hopf bifurcation conditions for general delayed fractional-order systems are proposed. The existence of Hopf bifurcations at the equilibrium is established. The critical values of the delay are identified, where the Hopf bifurcations occur and a family of oscillations bifurcate from the equilibrium. Same as the delay, the fractional order normally plays an important role in the dynamics of delayed fractional-order systems. It is found that the critical value of Hopf bifurcations is crucially dependent on the fractional order. Finally, numerical simulations are carried out to illustrate the main results. © 2017 Chinese Association of Automation.

关键词： Algebra Bifurcation (mathematics) Congestion control (communication) Convergence of numerical methods Differential equations Stability

SHOCK INITIATION OF EXPLOSIVES INVESTIGATED WITH SMALL PARTITION EXPERIMENT AND NUMERICAL SIMULATION

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Acta Mechanica Solida Sinica 2013年第4期26卷 353-361页

作者： Weijun Tao Shi Huan Fenglei Huang guoping jiang Earthquake Engineering Research Test Center of Guangzhou University State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

In order to investigate the shock ignition of high energy solid explosives by shock waves,we carry out Lagrangian experiments with 2-D Lagrangian technique which uses composite manganin-constantan （CMC）.The effects of the shock sensitivity of pressed solid high explosives,TNT,and the effect of the lateral rarefaction wave were *** on the measured pressure histories and the radial displacements,we formulate the Ignition and Growth reactive flow models for the pressed *** shock initiation process simulated by Ignition and Growth model agreed well with experimental *** pressed TNT model can be applied to shock initiation scenarios which are highly unpredictable and have not been or cannot be tested experimentally.

关键词： shock waves explosive Lagrangian analysis state equation rarefaction wave

An analyzing and experimental method based on the resultant motion signals for SCARA manipulator joints

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High Technology Letters 2017年第3期23卷 279-285页

作者：徐丰羽 Yang Zhong jiang guoping College of Automation Nanjing University of Posts and Telecommunications Nanjing 210003 P. R. China

Acceleration reflects vibration of a robot,and the vibration signal can reflect the operation state of the robot. Generally,detection of robot mechanical arm failure requires installing sensors on each joint. This study proposes a method to diagnose the fault by single acceleration sensor only,which is installed at the end of the robot. The operation state of the robot is evaluated by analyzing vibration characteristics of its acceleration. First,a data acquisition function of a programmable multi-axis controller is applied to extract practical motion signals of the robot joints during operation,and practical motion signals are analyzed. Second,synthetic methods to determine acceleration of the end joints of SCARA robots in a Cartesian space is used based on the theory of the Jacobian matrix and the frequency domain of final acceleration is investigated. The relationship between end-and joint-vibration frequencies under given speeds is determined. Then,the method is verified by comparing characteristic frequencies of joint acceleration and synthetic acceleration in Cartesian coordinate system at different speeds. Finally,some faults can be diagnosed by comparing the acceleration vibration frequency extracted by a single acceleration sensor installed at the end of robot with the normal running state. Thus,this method can be used to monitor the signal variation of each joint without installing sensors on each robot joint.

关键词： SCARA robot motion signal Jacobian matrix

Comparative Effects of Avoidance and Immunization on Epidemic Spreading in a Dynamic Small-World Network with Community Structure

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Wuhan University Journal of Natural Sciences 2016年第4期21卷 291-297页

作者： LI Chanchan jiang guoping SONG Yurong College of Computer Nanjing University of Posts and Telecommunications College of Automation Nanjing University of Posts and Telecommunications

Considering the actual behavior of people’s short-term travel,we propose a dynamic small-world community network model with tunable community strength which has constant local links and time varying long-range *** an epidemic model of susceptible-infected-recovered is established based on the mean-field method to evaluate the inhibitory effects of avoidance and immunization on epidemic *** an approximate formula for the epidemic threshold is obtained by mathematical *** simulation results show that the epidemic threshold decreases with the increase of inner-community motivation rate and inter-community long-range motivation rate,while it increases with the increase of immunization rate or avoidance *** indicates that the inhibitory effect on epidemic spreading of immunization works better than that of avoidance.

关键词： epidemic spreading community structure immunization avoidance dynamic small-world network

Multiple Input Multiple Output CDSK Chaotic Communication System and Its Performance Analysis

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Wuhan University Journal of Natural Sciences 2016年第3期21卷 221-228页

作者： DUAN Junyi jiang guoping YANG Hua School of Communication and Signal Nanjing Institute of Railway Technology School of Communication and Information Engineering Nanjing University of Posts and Telecommunications

This paper propose a novel noncoherent chaotic com- munication scheme named multiple-input multiple-output correlation-delay-shill- keying （MIMO-CDSK）. In this scheme, multiple antennas are employed to strengthen the robustness in transmission, and to get more diversity gain. The bit error rate （BER） of the MIMO-CDSK is studied analytically in AWGN channel model and multipath fading channel model. The theory and simulation results show that, the performance gain can be obtained with multiple antennas allocated in the transmitter and receiver. Moreover, it is observed that MIMO-CDSK system can effectively reduce the multipath interference.

关键词： multiple input multiple output correlation delayshift keying (CDSK) AWGN (additive white Gaussian noise)channel model multipath fading channel model diversity gain

Numerical Simulation of Concrete Plate Damaged Under Explosive Loading

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Transactions of Tianjin University 2006年第B09期12卷 158-160页

作者： HUAN Shi jiang guoping Chen Shengming TANG Xiangqian Earthquake Engineering Research Test Center Guangzhou University Guangzhou 510405 China Central South Forestry University Changsha 410082 China

The grisliness after-effects can be induced by explosion accident with the collapsing of the structures, the demolishing of the equipments and the casualty of the human beings. Isolation belt constructed between the blast point and the construction is one of the useful design schemes for blast resistance. The nonlinear procedure ANSYS/LSDYNA970 is used to simulate the contact detonation and the isolation belt of blast resistance filled with the air or water respectively. The results indicate that the maximal damage can be caused by the contact detonation, and the isolation belt of blast resistent filled with water can reduce the damage greatly.

关键词： concrete explosive loading state equation numerical simulation

STUDY ON PROPERTIES OF RECLAIMED SODIUM SILICATE SAND

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Chinese Journal of Mechanical Engineering 1998年第3期11卷 49-53页

作者： Zhao guoping jiang Zongyu Department of Materials Engineering, jiangsu University of Science and Technology jiangsu Univ of Science and Technology Jiangsu China

SEM shows that flowers and plants like sodium carbonate exists on the surface of sodium silicate sand grains when hardened by carbon dioxide, baculiform sodium acetate exists not only on sand surface but also inside sodium silicate film when hardened by ester method. The strength of sodium silicate sand mainly depends on the point bridge connecting strength of dewatered sodium silicate film. The performance of reclaimed sodium silicate sand is determined by the extent of which salinous crystal is eliminated and reasonableness of relevant technological methods.

关键词： Sodium silicate sand Structure Reclamation

Behavior of steel fiber-reinforced high-strength concrete at medium strain rate

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Frontiers of Structural and Civil Engineering 2009年第2期3卷 131-136页

作者： Chujie JIAO Wei SUN Shi HUAN guoping jiang School of Civil engineering Guangzhou UniversityGuangzhou 510006China School of Materials Science and Engineering Southeast UniversityNanjing 211189China Earthquake Engineering Research Test Center Guangzhou UniversityGuangzhou 510405China

Impact compression experiments for the steel fiber-reinforced high-strength concrete(SFRHSC)at medium strain rate were conducted using the split Hopkinson press bar(SHPB)testing *** volume fractions of steel fibers of SFRHSC were between 0 and 3%.The experimental results showed that,when the strain rate increased from threshold value to 90 s^(-1),the maximum stress of SFRHSC increased about 30%,the elastic modulus of SFRHSC increased about 50%,and the increase in the peak strain of SFRHSC was 2-3 times of that in the matrix *** strength and toughness of the matrix were improved remarkably because of the superposition effect of the aggregate high-strength matrix and steel fiber high-strength *** a result,under impact loading,cracks developed in the SFRHSC specimen,but the overall shape of the specimen remained virtually ***,under similar impact loading,the matrix specimens were almost broken into small pieces.

关键词： steel fiber-reinforced high-strength concrete(SFRHSC) high strain rates split Hopkinson press bar(SHPB) strain rate hardening effects