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期刊论文 12

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2020 2

2019 1

2014 1

2013 1

2007 1

2006 1

2001 2

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关键词

振动 2

混沌 2

混沌序列 2

Fitzhugh-Nagumo；混沌；分数阶；磁通量 1

分割攻击 1

分组密码 1

压路机工程 1

唯密文攻击 1

已知明文攻击 1

振荡 1

时间复杂度 1

波 1

移位密码 1

糖尿病；混沌；分叉；多稳定性；反单调性 1

置换网络 1

遍历性 1

非线性 1

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混沌工程学

龙运佳

《中国工程科学》 2001年 第3卷 第2期   页码 10-15

摘要：

世界是非线性的，线性只是其近似描述，混沌的发现表明：某些确定性非线性系统具有内在的随机行为。事实上，以往20年，无所不在的混沌现象几乎在每个学科都有所报道，如数学、物理学、化学，甚至社会科学。但理论研究学者的主要兴趣在于探究混沌的本质。与此同时，混沌的实际利用在许多工程领域受到重视，如信息工程、系统工程、医药工程、农业工程、电气工程、生物工程、机械工程、土木工程等。混沌工程学是一门新的研究混沌实际利用及其基本理论的非线性工程科学。文章对现代混沌工程学的定义、对象、概念、方法、理论与应用加以总结，并介绍其近来的进展及作者的工作。混沌工程学在国民经济与国防建设中研究的热点是：混沌分析技术，混沌控制技术与混沌生成技术。

关键词： 非线性     混沌     振荡     振动     波    

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Short-term prediction of the influent quantity time series of wastewater treatment plant based on a chaos

LI Xiaodong, ZENG Guangming, HUANG Guohe, LI Jianbing, JIANG Ru

《环境科学与工程前沿（英文）》 2007年 第1卷 第3期   页码 334-338 doi: 10.1007/s11783-007-0057-6

摘要： By predicting influent quantity, a wastewater treatment plant (WWTP) can be well controlled. The nonlinear dynamic characteristic of WWTP influent quantity time series was analyzed, with the assumption that the series was predictable. Based on this, a short-term forecasting chaos neural network model of WWTP influent quantity was built by phase space reconstruction. Reasonable forecasting results were achieved using this method.

关键词： nonlinear     reconstruction     WWTP influent     characteristic     Reasonable forecasting    

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Application of a Novel Fuzzy Clustering Method Based on Chaos Immune Evolutionary Algorithm for Edge

《机械工程前沿（英文）》 2006年 第1卷 第1期   页码 85-89 doi: 10.1007/s11465-005-0023-6

摘要：

A novel fuzzy clustering method based on chaos immune evolutionary algorithm (CIEFCM) is presented to solve fuzzy edge detection problems in image processing. In CIEFCM, a tiny disturbance is added to a filial generation group using a chaos variable and the disturbance amplitude is adjusted step by step, which greatly improves the colony diversity of the immune evolution algorithm (IEA). The experimental results show that the method not only can correctly detect the fuzzy edge and exiguous edge but can evidently improve the searching efficiency of fuzzy clustering algorithm based on IEA.

关键词： disturbance amplitude     disturbance     diversity     generation     processing    

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一个基于混沌的分组密码算法的分析

金晨辉

《中国工程科学》 2001年 第3卷 第6期   页码 75-80

摘要：

“基于混沌的分组密码置换网络的设计”一文提出的一个分组密码算法在已知明文攻击和唯密文攻击下都是很容易被破译的,而且在知道加密变换的条件下,很容易利用分割攻击方法求出该分组密码的密钥。此外,基于Logistic映射的混沌序列的相邻值之间的相互制约性,以及该混沌序列的前若干值对初值的低位比特不敏感。

关键词： 混沌序列     分组密码     移位密码     唯密文攻击     已知明文攻击     分割攻击    

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基于混沌的分组密码置换网络的设计

孙枫,秦红磊,徐耀群,郝燕玲

《中国工程科学》 2000年 第2卷 第9期   页码 47-49

摘要：

文章利用混沌序列的遍历性，给出了一种分组密码置换网络的设计，并对混沌序列的遍历性和置换网络的时间复杂度做了分析。计算机模拟结果显示，混沌分组密码置换网络具有复杂性高、抗破译性强的优点，可以增强信息系统的安全性。

关键词： 混沌序列     置换网络     遍历性     时间复杂度    

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Whole-life Thinking and Engineering the Future

Roger Flanagan

《工程管理前沿（英文）》 2014年 第1卷 第3期   页码 290-296 doi: 10.15302/J-FEM-2014040

摘要： Whole-life thinking for engineers working on the built environment has become more important in a fast changing world. Whole-life thinking is not new, every project attempts to balance the initial capital cost with the operating and maintenance cost of an asset. Engineers are increasingly concerned with complex systems, in which the parts interact with each other and with the outside world in many ways — the relationships between the parts determine how the system behaves. Systems thinking provides one approach to developing a more robust whole-life approach. Systems thinking is a process of understanding how things influence one another within a wider perspective. Complexity, chaos, and risk are endemic in all major projects. New approaches are needed to produce more reliable whole-life predictions. Best value, rather than lowest cost, can be achieved by using whole-life appraisal as a part of the design and delivery strategy.

关键词： whole-life thinking     systems thinking     complexity     chaos     risk management through life    

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Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

《机械工程前沿（英文）》 2013年 第8卷 第2期   页码 160-168 doi: 10.1007/s11465-013-0258-6

摘要：

In this paper, nonlinear dynamic behavior of a four-bar linkage considering clearance is studied. The dynamic model of the linkage with a clearance between coupler and rocker is developed firstly. Then the dynamic equations of this mechanism are solved by a numerical method. According to the calculated response, compliance, force and trajectory of pin in joint bearing are obtained. Effects of clearance magnitude and the relationship between a mechanism with clearance and without clearance are studied. By using Poincare Map, it is proved that strange attractors or chaos exist in the dynamic response. In addition, phenomena of chaos, periodic response and subharmonic response also can be found in the special condition. Bifurcation diagram is used to suggest that bifurcation and fractal phenomena exist in the dynamic response of this mechanism.

关键词： four-bar linkage     chaos     bifurcation     strange attractors     dynamics    

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基于混沌振动力学的压路机工程

龙运佳,杨勇,王聪玲

《中国工程科学》 2000年 第2卷 第9期   页码 76-79

摘要：

为将混沌振动力学的理论研究转化为压路机工程的新技术成果，研制了三种混沌振动压路机（0.75t,10t,14t)，并进行了振动测试、数值仿真与压实试验，证明混沌振动压路机比普通振动压路机提高工效12.2%。其中，14t重型混沌振动压路机已用于我国西部高速公路开发。

关键词： 混沌     振动     压路机工程    

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Uncertainty propagation in dynamics of composite plates: A semi-analytical non-sampling-based approach

Mahdi FAKOOR, Hadi PARVIZ

《结构与土木工程前沿（英文）》 2020年 第14卷 第6期   页码 1359-1371 doi: 10.1007/s11709-020-0658-8

摘要： In this study, the influences of spatially varying stochastic properties on free vibration analysis of composite plates were investigated via development of a new approach named the deterministic-stochastic Galerkin-based semi-analytical method. The material properties including tensile modulus, shear modulus, and density of the plate were assumed to be spatially varying and uncertain. Gaussian fields with first-order Markov kernels were utilized to define the aforementioned material properties. The stochastic fields were decomposed via application of the Karhunen-Loeve theorem. A first-order shear deformation theory was assumed, following which the displacement field was defined using admissible trigonometric modes to derive the potential and kinetic energies. The stochastic equations of motion of the plate were obtained using the variational principle. The deterministic-stochastic Galerkin-based method was utilized to find the probability space of natural frequencies, and the corresponding mode shapes of the plate were determined using a polynomial chaos approach. The proposed method significantly reduced the size of the mathematical models of the structure, which is very useful for enhancing the computational efficiency of stochastic simulations. The methodology was verified using a stochastic finite element method and the available results in literature. The sensitivity of natural frequencies and corresponding mode shapes due to the uncertainty of material properties was investigated, and the results indicated that the higher-order modes are more sensitive to uncertainty propagation in spatially varying properties.

关键词： composite plate     spatially varying stochastic properties     Galerkin method     polynomial chaos approach     semi-analytical approach    

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Probabilistic stability of uncertain composite plates and stochastic irregularity in their buckling mode shapes: A semi-analytical non-intrusive approach

《结构与土木工程前沿（英文）》   页码 179-190 doi: 10.1007/s11709-022-0888-z

摘要： In this study, the mechanical properties of the composite plate were considered Gaussian random fields and their effects on the buckling load and corresponding mode shapes were studied by developing a semi-analytical non-intrusive approach. The random fields were decomposed by the Karhunen−Loève method. The strains were defined based on the assumptions of the first-order and higher-order shear-deformation theories. Stochastic equations of motion were extracted using Euler–Lagrange equations. The probabilistic response space was obtained by employing the non-intrusive polynomial chaos method. Finally, the effect of spatially varying stochastic properties on the critical load of the plate and the irregularity of buckling mode shapes and their sequences were studied for the first time. Our findings showed that different shear deformation plate theories could significantly influence the reliability of thicker plates under compressive loading. It is suggested that a linear relationship exists between the mechanical properties’ variation coefficient and critical loads’ variation coefficient. Also, in modeling the plate properties as random fields, a significant stochastic irregularity is obtained in buckling mode shapes, which is crucial in practical applications.

关键词： uncertain composite plate     stochastic assume mode method     Karhunen−Loève theorem     polynomial chaos approach     plate buckling     irregularity in buckling mode shapes    

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整数阶与分数阶非连续外磁通量的神经元动力学 Regular Papers

Karthikeyan RAJAGOPAL, Fahimeh NAZARIMEHR, Anitha KARTHIKEYAN, Ahmed ALSAEDI, Tasawar HAYAT, Viet-Thanh PHAM

《信息与电子工程前沿（英文）》 2019年 第20卷 第4期   页码 584-590 doi: 10.1631/FITEE.1800389

摘要： 提出一种改进Fitzugh-Nagumo神经元（MFNN）模型。在此模型基础上，研究了基于整数阶（案例A）与分数阶（案例B）的MFNN系统。在电磁感应和辐射作用下，记忆和感应呈现多种分布，证明该分数阶磁通量适用于非均匀扩散。整数阶非连续磁通量MFNN系统具有混沌和非混沌吸引子。系统动力学分析显示倍周期的产生和消失标志着反单调性，神经元动力学研究未曾报道此现象。在分数阶非连续磁通量MFNN系统中，混沌吸引子和周期吸引子无反单调性。

关键词： Fitzhugh-Nagumo；混沌；分数阶；磁通量    

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分数阶血糖-胰岛素调节系统的混沌动力学 Research Articles

Karthikeyan RAJAGOPAL1,2, Atiyeh BAYANI3, Sajad JAFARI3,4, Anitha KARTHIKEYAN1, Iqtadar HUSSAIN5

《信息与电子工程前沿（英文）》 2020年 第21卷 第7期   页码 1108-1118 doi: 10.1631/FITEE.1900104

摘要： 本文推导血糖-胰岛素调节系统的分数阶模型。现有文献已证明复杂系统的分数阶分析能够揭示系统有趣且未知的特征。本文揭示血糖-胰岛素系统在其分数阶形式下表现出多稳定性与反单调性。为体现分数阶分析的有效性，进行了所有数值模拟，包括平衡点稳定性、李雅普诺夫指数、分叉图等。详细研究由未经调节的血糖-胰岛素系统引起的各种生物紊乱，这将有助于更好地理解调节系统。

关键词： 糖尿病；混沌；分叉；多稳定性；反单调性    

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标题 作者 时间 类型 操作

混沌工程学

龙运佳

期刊论文

Short-term prediction of the influent quantity time series of wastewater treatment plant based on a chaos

LI Xiaodong, ZENG Guangming, HUANG Guohe, LI Jianbing, JIANG Ru

期刊论文

Application of a Novel Fuzzy Clustering Method Based on Chaos Immune Evolutionary Algorithm for Edge

期刊论文

一个基于混沌的分组密码算法的分析

金晨辉

期刊论文

基于混沌的分组密码置换网络的设计

孙枫,秦红磊,徐耀群,郝燕玲

期刊论文

Whole-life Thinking and Engineering the Future

Roger Flanagan

期刊论文

Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

期刊论文

基于混沌振动力学的压路机工程

龙运佳,杨勇,王聪玲

期刊论文

Uncertainty propagation in dynamics of composite plates: A semi-analytical non-sampling-based approach

Mahdi FAKOOR, Hadi PARVIZ

期刊论文

Probabilistic stability of uncertain composite plates and stochastic irregularity in their buckling mode shapes: A semi-analytical non-intrusive approach

期刊论文

整数阶与分数阶非连续外磁通量的神经元动力学

Karthikeyan RAJAGOPAL, Fahimeh NAZARIMEHR, Anitha KARTHIKEYAN, Ahmed ALSAEDI, Tasawar HAYAT, Viet-Thanh PHAM

期刊论文

分数阶血糖-胰岛素调节系统的混沌动力学

Karthikeyan RAJAGOPAL1,2, Atiyeh BAYANI3, Sajad JAFARI3,4, Anitha KARTHIKEYAN1, Iqtadar HUSSAIN5

期刊论文