International Journal of Nonlinear Sciences and Numerical Simulation最新文献_第6页

Investigation on Electrothermoelastic Behavior of FGPM Cylindrical Shells FGPM圆柱壳电热弹性性能研究

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-02-01 DOI: 10.1515/ijnsns-2015-0037

H. Dai, Yi-Nan Qi, Wei-Feng Luo

引用次数: 2

Fundamental Sources of Economic Complexity 经济复杂性的基本来源

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-02-01 DOI: 10.1515/ijnsns-2014-0085

A. Jakimowicz

{"title":"Fundamental Sources of Economic Complexity","authors":"A. Jakimowicz","doi":"10.1515/ijnsns-2014-0085","DOIUrl":"https://doi.org/10.1515/ijnsns-2014-0085","url":null,"abstract":"Abstract This article analyses the basic sources and types of economic complexity: chaotic attractors and repellers, complexity catastrophes, coexistence of attractors, sensitive dependence on parameters, final state sensitivity, effects of fractal basin boundaries and chaotic saddles. Four nonlinear classic models have been used for this purpose: virtual duopoly model, model of a centrally planned economy, cobweb model with adaptive expectations and the business cycle model. The issue of economic complexity has not been sufficiently dealt with in the literature. Studies of complexity in economics usually focus on identifying the conditions under which deterministic chaos emerges in models as the main form of complexity, while analyses of other forms of complexity are much less frequent. The article has two objectives: methodological and explicative, which are to shed some new light on the issue. The first objective is to make as comprehensive a catalogue of sources of economic complexity as possible; this is to be achieved by the numerical calculations presented in this article. The issue of accumulation of complexity has been emphasized, which is a type of system dynamics which has its roots in coincidence and overlapping of complexity originating in different sources. The second objective involves an explanation of the role which is played in generating complexity by classic laws of economics. It appears that there is another overarching law, which is independent of the type of system or the level of economic analysis, which states that the long-term effect of conventional economic laws is an inevitable increase in the complexity of markets and economies. Therefore, the sources of complexity discussed in this article are called fundamental ones.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ijnsns-2014-0085","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66791350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Application of Bat Algorithm to Optimize Scaling Factors of Fuzzy Logic-Based Power System Stabilizer for Multimachine Power System 应用Bat算法优化基于模糊逻辑的多机电力系统稳定器比例因子

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-02-01 DOI: 10.1515/ijnsns-2015-0025

D. K. Sambariya, R. Prasad

引用次数: 12

Periodic and Quasi-periodic Responses of Van der Pol–Mathieu System Subject to Various Excitations 各种激励下Van der Pol-Mathieu系统的周期和拟周期响应

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-02-01 DOI: 10.1515/ijnsns-2015-0012

Q. Fan, A. Leung, Y. Lee

引用次数: 12

Solving Large-Deflection Problem of Spatial Beam with Circular Cross-Section Using an Optimization-Based Runge–Kutta Method 基于优化的龙格-库塔法求解圆形截面空间梁大挠度问题

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-02-01 DOI: 10.1515/ijnsns-2015-0053

Geng Li, J. Jia, Guimin Chen

{"title":"Solving Large-Deflection Problem of Spatial Beam with Circular Cross-Section Using an Optimization-Based Runge–Kutta Method","authors":"Geng Li, J. Jia, Guimin Chen","doi":"10.1515/ijnsns-2015-0053","DOIUrl":"https://doi.org/10.1515/ijnsns-2015-0053","url":null,"abstract":"Abstract Based on the Bernoulli–Euler beam theory, the nonlinear governing differential equations (GDEs) for a spatially deflected beam with circular cross-section are formulated, which are then reduced to first-order differential equations to be compatible with Runge–Kutta method. With the boundary conditions of a spatial beam, the governing equations are treated as an initial value problem (IVP) of ordinary differential equations. A Runge–Kutta method combined with an unconstrained optimization algorithm (RKUO) is presented to solve the IVP. The approach for determining the orientation of the cross-section plane at any position on the deflected beam is also provided. Finally, the comparison between the RKUO results and those achieved using nonlinear finite element (NFE) analysis and spatial pseudo-rigid-body model validate the accuracy and effectiveness of RKUO. The results also demonstrated the unique capabilities of RKUO to solve large spatial deflection problems that are outside the range of nonlinear finite element model.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ijnsns-2015-0053","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66791639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Mathematical Modelling of Enfuvirtide and Protease Inhibitors as Combination Therapy for HIV 恩福韦肽与蛋白酶抑制剂联合治疗HIV的数学模型

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-01-29 DOI: 10.1515/ijnsns-2015-0051

S. Chowdhury, P. Roy, Robert J. Smith

{"title":"Mathematical Modelling of Enfuvirtide and Protease Inhibitors as Combination Therapy for HIV","authors":"S. Chowdhury, P. Roy, Robert J. Smith","doi":"10.1515/ijnsns-2015-0051","DOIUrl":"https://doi.org/10.1515/ijnsns-2015-0051","url":null,"abstract":"Abstract Enfuvirtide (formerly T20) is an injectable fusion inhibitor that has established effective antiretroviral activity and excellent tolerability in extensively pretreated patients. This fusion inhibitor does not affect the metabolism of other co-administrated drugs for metabolic drug interactions involving enfuvirtide. Few mathematical models have considered co-administration of antiretroviral drugs. We develop a mathematical model to study the effect of enfuvirtide upon this process in combination with protease inhibitors (PIs) using impulsive differential equations. We divide the T cells into several classes to describe the drug activity. Analytical results show that a combination of enfuvirtide and PIs gives a better outcome than single drug activity; furthermore, use of enfuvirtide clearly outranks PIs if only one class of drugs were to be used. We determine the threshold value for the dosage and dosing intervals to ensure the stability of the disease-free state and illustrate our results with numerical simulations. We recommend that use of enfuvirtide, in combination with PIs, be expanded beyond salvage therapy.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ijnsns-2015-0051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66791601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Quad-Decomposition of Velocity Field in Spanwise-Rotating Turbulent Plane Couette Flows 展向旋转湍流平面Couette流速度场的四次分解

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-01-29 DOI: 10.1515/ijnsns-2015-0195

Q. Cai, Jie Gai, Zhili Sun, Zhenhua Xia

{"title":"Quad-Decomposition of Velocity Field in Spanwise-Rotating Turbulent Plane Couette Flows","authors":"Q. Cai, Jie Gai, Zhili Sun, Zhenhua Xia","doi":"10.1515/ijnsns-2015-0195","DOIUrl":"https://doi.org/10.1515/ijnsns-2015-0195","url":null,"abstract":"Abstract In this paper, we propose a new quad-decomposition approach for the instantaneous flow field which has the secondary flows. Different from the previously reported quad-decomposition, where the velocity field is decomposed into a mean part, a streamwise part and a cross-flow part of the secondary flow, and the residual three-dimensional fluctuation part, our new quad-decomposition separates the flow field into a mean part, a streamwise streaks-related part, a cross-flow roll-cells-related part and a residual cross-flow fluctuation part. These two decomposition approaches are used to explore the underlying physics of the energy balance and transfer among different shares of the turbulent kinetic energy in spanwise-rotating turbulent plane Couette flows. The new quad-decomposition can provide clear pictures of the energy transfer from the streaks to the residual cross-flow fluctuations due to the system rotation and the correlation between pressure and streamwise velocity fluctuations’ gradient, in addition to the bridge role of the cross-flow roll-cells-related field between the mean field and the residual fluctuation field, which can also be demonstrated by the previous quad-decomposition.","PeriodicalId":50304,"journal":{"name":"International Journal of Nonlinear Sciences and Numerical Simulation","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2016-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/ijnsns-2015-0195","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66792141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Almost Periodic Solution in a Lotka–Volterra Recurrent Neural Networks with Time-Varying Delays 一类时变时滞Lotka-Volterra递归神经网络的概周期解

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2016-01-01 DOI: 10.1515/ijnsns-2015-0171

Li Yang, Zhouhong Li, Liyan Pang, Tianwei Zhang

引用次数: 1

A Class of Exact Solution of (3+1)-Dimensional Generalized Shallow Water Equation System 一类(3+1)维广义浅水方程组的精确解

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2015-12-18 DOI: 10.1515/ijnsns-2015-2001

Jian‐Guo Liu, Zhi-Fang Zeng, Yan He, Guo-Ping Ai

引用次数: 1

Lie Symmetries and Exact Solutions of Shallow Water Equations with Variable Bottom 变底浅水方程的李对称性与精确解

IF 1.5 4区工程技术

International Journal of Nonlinear Sciences and Numerical Simulation Pub Date : 2015-12-01 DOI: 10.1515/ijnsns-2015-0093

M. Pandey

引用次数: 16