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Initial-condition-switched boosting extreme multistability and mechanism analysis in a memcapacitive oscillator Research Articles

Bei Chen, Quan Xu, Mo Chen, Huagan Wu, Bocheng Bao,mervinbao@126.com

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 11, Pages 1517-1531 doi: 10.1631/FITEE.2000622

Abstract: has seized scientists’ attention due to its rich diversity of dynamical behaviors and great flexibility in engineering applications. In this paper, a four-dimensional (4D) is built using four linear circuit elements and one nonlinear charge-controlled memcapacitor with a cosine inverse memcapacitance. The 4D possesses a line equilibrium set, and its stability periodically evolves with the initial condition of the memcapacitor. The 4D exhibits due to the periodically evolving stability. Complex dynamical behaviors of period doubling/halving bifurcations, chaos crisis, and initial-condition-switched coexisting attractors are revealed by bifurcation diagrams, Lyapunov exponents, and phase portraits. Thereafter, a reconstructed system is derived via integral transformation to reveal the forming mechanism of the in the . Finally, an implementation circuit is designed for the reconstructed system, and Power SIMulation (PSIM) simulations are executed to confirm the validity of the numerical analysis.

Keywords：超级多稳定性；初值切换调控；忆容振荡器；机理分析

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Stability of General Linear Dynamic Multi-Agent Systems under Switching Topologies with Positive Real Eigenvalues Article

Shengbo Eben Li, Zhitao Wang, Yang Zheng, Diange Yang, Keyou You

Engineering 2020, Volume 6, Issue 6, Pages 688-694 doi: 10.1016/j.eng.2020.05.006

Abstract:

The time-varying network topology can significantly affect the stability of multi-agent systems. This paper examines the stability of leader–follower multi-agent systems with general linear dynamics and switching network topologies, which have applications in the platooning of connected vehicles. The switching interaction topology is modeled as a class of directed graphs in order to describe the information exchange between multi-agent systems, where the eigenvalues of every associated matrix are required to be positive real. The Hurwitz criterion and the Riccati inequality are used to design a distributed control law and estimate the convergence speed of the closed-loop system. A sufficient condition is provided for the stability of multi-agent systems under switching topologies. A common Lyapunov function is formulated to prove closed-loop stability for the directed network with switching topologies. The result is applied to a typical cyber–physical system—that is, a connected vehicle platoon—which illustrates the effectiveness of the proposed method.

Keywords： Stability Multi-agent system Switching topologies Common Lyapunov function

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Periodically varied initial offset boosting behaviors in a memristive system with cosine memductance Regular Papers

Mo CHEN, Xue REN, Hua-gan WU, Quan XU, Bo-cheng BAO

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 12, Pages 1706-1716 doi: 10.1631/FITEE.1900360

Abstract: A four-dimensional memristive system is constructed using a novel ideal memristor with cosine memductance. Due to the special memductance nonlinearity, this memristive system has a line equilibrium set (0, 0, 0, δ) located along the coordinate of the inner state variable of the memristor, whose stability is periodically varied with a change of δ. Nonlinear and one-dimensional initial offset boosting behaviors, which are triggered by not only the initial condition of the memristor but also other two initial conditions, are numerically uncovered. Specifically, a wide variety of coexisting attractors with different positions and topological structures are revealed along the boosting route. Finally, circuit simulations are performed by Power SIMulation (PSIM) to confirm the unique dynamical features.

Keywords： Initial offset boosting Memristive system Memductance Line equilibrium set

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Progress and Prospect of Seafloor Instability Research

Gao Weijian, Li Wei

Strategic Study of CAE 2023, Volume 25, Issue 3, Pages 109-121 doi: 10.15302/J-SSCAE-2023.03.010

Abstract:

Seafloor instability and secondary submarine geohazards are widely present in the ocean, posing a threat to submarine infrastructures such as coastal port facilities, offshore drilling platforms, and submarine pipelines and fiber-optic cables. However, formation mechanisms and controlling factors of seafloor instability are still poorly understood. To improve the understanding, based on the history and development of seafloor instability, this study sorts out the common categories, global distribution, and geophysical characteristics, analyzes the formation mechanisms, controlling factors, and engineering geohazards risks, and summarizes popular quantitative analysis methods for seafloor instability. Subsequently, the application and limitations of experimental simulation technology for the slope instability process are discussed. Focused on the disaster mechanism, intelligent analysis of multi-source data, and three-dimensional monitoring of seabed instability, this study proposed the development direction and countermeasures of future seafloor instability research, aiming to provide guiding suggestions for the simulation, prediction, and warning of seafloor instability.

Keywords： seafloor instability submarine geohazards formation mechanisms risk assessment instability analysis

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Stability analysis of uncertain fractional-order neutral-type delay systems with actuator saturation Research Articles

Zahra Sadat Aghayan, Alireza Alfi, J. A. Tenreiro Machado,a_alfi@shahroodut.ac.ir

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 10, Pages 1402-1412 doi: 10.1631/FITEE.2000438

Abstract: This study analyzes the problem of of fractional-order delay systems of neutral type under actuator . A Lyapunov–Krasovskii (LK) function is constructed and conditions of the asymptotic of such systems are given, which are formulated by linear matrix inequalities (LMIs), using the Lyapunov direct method. An algorithm is introduced to compute the gain of the state feedback controller for extending the domain of attraction. The theoretical results are validated using some numerical examples.

Keywords：分数阶系统；稳定性；中立时滞；鲁棒性；饱和性

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Retraction Note to: Dynamic stability enhancement of interconnected multi-source power systems using hierarchical ANFIS controller-TCSC based on multi-objective PSOs Retraction Note

Ali Darvish FALEHI, Ali MOSALLANEJAD

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5, doi: 10.1631/FITEE.19r0001

Abstract: None

Keywords： None

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Relationship of Structure and Stability in Emulsion Explosvie

Wang Xuguang,Shen Yingfeng

Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 24-29

Abstract:

Through the study on structure, this paper systematically analysed various factors affecting stability of emulsion explosives, and drew a conclusion that zero osmosis pressure might be a good criterion of its stability. The experimental results show that the osmosis pressures of several kinds of stable emulsion explosive are near zero.

Keywords： emulsion explosives structure stability

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MIMO-GPC Stability Analysis Based on Frequency Domain

Sun Qinglin,Chen Zengqiang,Yuan Zhuzhi

Strategic Study of CAE 2004, Volume 6, Issue 10, Pages 39-44

Abstract:

A MIMO-GPC stability theorem based on frequency domain is presented in the paper. The closed-loop feedback structure of MIMO-GPC is proposed. Nyquist array methodology is used to analyze the stability of MIMO-GPC. The parameters of MIMO-GPC can be determined by stability criterion.

Keywords： MIMO-GPC frequency domain analysis stability criterion

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Flutter stability and management strategy for the deck of Taizhou Bridge during construction stage

Li Chengcheng,Chen Airong and Ma Rujin

Strategic Study of CAE 2012, Volume 14, Issue 5, Pages 46-50

Abstract:

In this paper, Taizhou Bridge, a three-tower suspension bridge was investigated to discover the flutter stability of deck under symmetrical construction through FEM（finite element method） analysis and full aeroelastic model tests. The assessment of flutter stability during deck construction stage was performed based on analysis of the monthly maximum wind speed in the past 30 years. In the end, the assessment and management strategy of flutter stability were proposed, which can be referred for other bridges.

Keywords： multi tower suspension bridge construction stage flutter stability management strategy

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Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges

Zhang Xinjun and Sun Hailing

Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 50-58

Abstract:

With the increase of span length，the cable-stayed bridge tends to be a more slender structural system，and consequently the wind stability becomes an important problem for its design and construction. Three-dimensional nonlinear aerostatic and aerodynamic stability analysis of long-span bridges is used to investigate the aerostatic and aerodynamic stability of a super long- span cable- stayed bridge with main span of1400m，and the results are compared with those of a suspension bridge with the similar main span，and considering from the aspect of wind stability，the availability of using the cable- stayed bridge in super long- span bridges whose main span exceeds1000m is discussed. In addition，parametric analysis on the aerostatic and aerodynamic stability of super long-span cable-stayed bridges is conducted including the depthand width of the girder，structure style of the tower，the tower’s height-to-spanratio，the ratio of side span to main span，the auxiliary piers in the side span and the anchorage system of stay cables etc，and the key design parameters are pointed out，and also their reasonable values are proposed. The results show that as compared to the suspension bridge with the same main span，the cable- stayed bridge has greater structural stiffness，and becomes more stable under the static and dynamic wind action，and consequently becomes a favorable structural system for super long- span bridges whose main span exceeds1000m；the super long- span cable- stayed bridge becomes more aerostatically and aerodynamically stable under the cases that the girder depth is increased，the girder width is decreased，the inverse Y-shaped tower is used，the tower’s height is increased，the side span is shortened，the auxiliary piers are installed in side span and the stayed cables are partially earth-anchored.

Keywords： super long-span cable-stayed bridge aerostatic stability aerodynamic stability design parameter

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Stability and Instability of Systems—An Extended Discussion on Stir Kinetic Energy Conservation Law

Chen Gangyi,Ouyang Bolin,Yuan Dongsheng,Hao Liping,Zhou Lirong

Strategic Study of CAE 2005, Volume 7, Issue 8, Pages 41-46

Abstract:

It is an extended discussion on the stir kinetic energy conservation law, which is proposed by OuYang Shoucheng. The authors think that stir kinetic energy conservation law is an important principle and analysis method for stability and evolutionism of systems. It is not only an approach for explaining stability of system, but also the analysis method for evolutionism of system, and it points out some problems in Newton's theories as well.

Keywords： system construction stir kinetic energy stability and evolutionism

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Mittag-Leffler stability analysis ofmultiple equilibrium points in impulsive fractional-order quaternion-valued neural networks Research Articles

K. UDHAYAKUMAR, R. RAKKIYAPPAN, Jin-de CAO, Xue-gang TAN

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2, Pages 234-246 doi: 10.1631/FITEE.1900409

Abstract: In this study, we investigate the problem of multiple Mittag-Leffler stability analysis for fractional-order quaternion-valued neural networks (QVNNs) with impulses. Using the geometrical properties of activation functions and the Lipschitz condition, the existence of the equilibrium points is analyzed. In addition, the global Mittag-Leffler stability of multiple equilibrium points for the impulsive fractional-order QVNNs is investigated by employing the Lyapunov direct method. Finally, simulation is performed to illustrate the effectiveness and validity of the main results obtained.

Keywords： Mittag-Leffler stability Fractional-order Quaternion-valued neural networks Impulse

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A method for improve the mechanical robustness of the superhydrophobic wood

Wang Chengyu and Liu Feng

Strategic Study of CAE 2014, Volume 16, Issue 4, Pages 79-82

Abstract:

Improvement of the robustness of superhydrophobic surface is crucial for the purpose of achieving commercial applications of these surfaces in such various areas as self-cleaning，water repellency and corrosion resistance.We have investigated a fabrication of polyvinyl alcohol（PVA）/silica（SiO2）composite polymer coating on wooden substrates with super repellency toward water，low sliding angles，low contact angle hysteresis，and relatively better mechanical robustness.

Keywords： superhydrophobic mechanical robustness PVA/SiO2 wood surface

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Numerical Analysis and Experiment Study of Stability for Dam Section No.3 of the Three Gorges Project

Ren Qingwen,Yu Tiantang,Ma Liangyun

Strategic Study of CAE 1999, Volume 1, Issue 3, Pages 41-45

Abstract:

One of the important problems for the Three Gorges Project is the stability for dam section No.1〜No.5 at left bank. The stability safety of dam section No.3 is studied with elasto — plastic Block Element Method (BKEM) in the paper. BKEM is a numerical analysis method. The basic unknown quantities of BKEM are the rigid displacements of the central points of block elements. Structure interface can be precisely and conveniently simulated in the method, and mechanical problem of discontinuous medium can be better. The correct ness of stability analysis of BKEM is proved with indoor model experiment and the two results are very consistent with each other. Finally, the result of stability analysis for dam section No.3 under several conditions is presented.

Keywords： Theree Gorges dam elasto-plastic BKEM model experiment stability analysis

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Evaluation of slope stability based on GA-ANFIS

Lin Xianzhi,Xue Tao,Yu Peng,Chen Qing

Strategic Study of CAE 2011, Volume 13, Issue 3, Pages 77-81

Abstract:

Adaptive neuro-fuzzy inference system combines the interpretability of fuzzy reasoning and the ability of adaptability and self-learning of neural network, overcoming the enormous difficulties for slope stability analysis caused by the uncertainty of rock slope. At the same time, for the reasonable of parameter setting in fuzzy inference system, evaluation model of adaptive neuro-fuzzy inference based on genetic algorithm is established. It was shown that the results of GA-ANFIS model are consistent with field condition, which makes it be an effective method for slope stability evaluation.

Keywords： GA-ANFIS model evaluation index uncertainty slope stability evaluation

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Title Author Date Type Operation

Initial-condition-switched boosting extreme multistability and mechanism analysis in a memcapacitive oscillator

Bei Chen, Quan Xu, Mo Chen, Huagan Wu, Bocheng Bao,mervinbao@126.com

Journal Article

Stability of General Linear Dynamic Multi-Agent Systems under Switching Topologies with Positive Real Eigenvalues

Shengbo Eben Li, Zhitao Wang, Yang Zheng, Diange Yang, Keyou You

Journal Article

Periodically varied initial offset boosting behaviors in a memristive system with cosine memductance

Mo CHEN, Xue REN, Hua-gan WU, Quan XU, Bo-cheng BAO

Journal Article

Progress and Prospect of Seafloor Instability Research

Gao Weijian, Li Wei

Journal Article

Stability analysis of uncertain fractional-order neutral-type delay systems with actuator saturation

Zahra Sadat Aghayan, Alireza Alfi, J. A. Tenreiro Machado,a_alfi@shahroodut.ac.ir

Journal Article

Retraction Note to: Dynamic stability enhancement of interconnected multi-source power systems using hierarchical ANFIS controller-TCSC based on multi-objective PSOs

Ali Darvish FALEHI, Ali MOSALLANEJAD

Journal Article

Relationship of Structure and Stability in Emulsion Explosvie

Wang Xuguang,Shen Yingfeng

Journal Article

MIMO-GPC Stability Analysis Based on Frequency Domain

Sun Qinglin,Chen Zengqiang,Yuan Zhuzhi

Journal Article

Flutter stability and management strategy for the deck of Taizhou Bridge during construction stage

Li Chengcheng,Chen Airong and Ma Rujin

Journal Article

Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges