Adaptive Control Model and Algorithms for the Dynamic Flowshop Scheduling Problem

1.IntroductionProductionschedulingcanbedefinedgenerallyastheallocationoftheresourcesinaproductionsystemovertimetoperformtheoperationsneededtotransformrawmaterialsilltoproducts.Aneffectiveandefficientschedulingsystemisnecessarytowellachievethepotentialsofaproductionfacility.Productionschedulingproblemsareextremelycomplex.Thecomplexityismainlyduetothefollowingtwofeaturesoftheproblem(Liu,1995).InterconnectedDecisions:Thecomponentsofaproductionsystem,e.g.,machines,ma-tenalhandlingdevicesandstora…     

A Modified Version of ABS Algorithms

Solving Ax=b where A=(a_1,…,a_m)~T∈R~m,n,x∈R~n,b∈R~m,by the ABS al-gorithm,we have the gelleral solution for the first i equations being of the form x=x-i 1 H_i 1~Tq,q∈R~n.Construct Z_i 1 such that Rang(Z_i 1)=Rang(H_i 1~T)=Null(A_i)and Z_i 1 is of full rank in column.Thus,x=x_(i 1) Z_i 1,q∈R~n-i.The modifiedalgorithms are based upon the idea that Z_i 1 is of full rank at each step.     

Study of the Optimal Integrated Control of a Dengue Transmission Model北大核心CSCD

建立了一个登革热在蚊子和人之间传播的模型,引入了Wolbachia、自我保护和杀虫剂三种控制措施,分别从常数控制和时变控制两个方面进行探讨。首先,分析了常数控制对模型基本再生数的影响,研究发现:Wolbachia有助于减小基本再生数,且基本再生数与自我保护和杀虫剂呈负相关。其次,以使得感染数最少且实施成本最低为目标,使用Pontryagin极值原理讨论最优控制。最后,通过数值模拟展示了最优控制的效果。     

Switching Control of Nonlinear Systems Based on the Quasi-ARX Model and the SVR Algorithm北大核心CSCD

该文基于改进的含有外部输入项的准线性自回归(准ARX)径向基函数(RBF)网络模型和支持向量回归(SVR)算法,提出了一种非线性切换控制方法.改进的准ARX模型非线性部分采用RBF网络.控制系统设计过程分为三个部分:首先,利用聚类方法确定模型的非线性参数;然后,采用线性SVR算法来解决控制系统的鲁棒性问题;接下来,基于控制误差给出切换判定函数,确定切换律给出控制序列.最后通过数值仿真验证了该方法的有效性.     

Hyperbolic Chaos in Systems Based on FitzHugh – Nagumo Model Neurons

In the present paper we consider and study numerically two systems based on model FitzHugh–Nagumo neurons, where in the presence of periodic modulation of parameters it is possible to implement chaotic dynamics on the attractor in the form of a Smale–Williams solenoid in the stroboscopic Poincaré map. In particular, hyperbolic chaos characterized by structural stability occurs in a single neuron supplemented by a time-delay feedback loop with a quadratic nonlinear element.     

Structure-Preserving Algorithms for a Class of Dynamical Systems

In this paper,we study structure-preserving algorithms for dynamical systems defined by ordinarydifferential equations in R~n.The equations are assumed to be of the form y~·=A(y) D(y) R(y),where A(y)is the conservative part subject to     

Specialty Costs in English Hospitals — A Statistical Approach Based upon a Cost Component Model

A previous paper in this Journal compared various regression models designed to relate hospital recurrent expenditure to corresponding measures of hospital activity and services provided. The paper concluded by discussing briefly an alternative approach designed to avoid some of the criticisms raised and to reconcile the differing viewpoints inherent in the existing models. The objective of the present paper is to describe this alternative approach in more detail. The model introduced is concerned with the separate modelling of a number of broad components of hospital inpatient expenditure, rather than with the total expenditure in isolation. A system of simultaneous regression models is proposed, each related to a particular area of expenditure, the structure of each being determined by means of empirical analyses based upon data from some 1505 English hospitals. It is shown that when the total costs generated by aggregating the cost components are considered, the models provide a better representation of the cost structure of English hospitals than the models based upon total costs published in the recent literature. Various applications of the models in the management and planning of hospital services involving the use of micro- or other computers are discussed.     

Comparison of various concepts of a random attractor:¶ A case study

Several non-equivalent definitions of an attractor of a random dynamical system have been proposed in the literature. We consider a rather simple special case: random dynamical systems with state space [0, ￥) [0, \infty) which fix 0. We examine conditions under which the set {0} is an attractor for three different notions of an attractor. It turns out that even in this simple case the various concepts are quite different. The purpose of this note is to highlight these differences and thus provide a basis for discussion about the "correct" concept of a random attractor.     

Positive Periodic Solutions of a Class of Non-autonomous Single Species Population Model with Delays and Feedback Control

With the help of a continuation theorem based on Gaines and Mawhin＇s coincidence degree, several verifiable criteria are established for the global existence of positive periodic solutions of a class of non-autonomous single species population model with delays （both state-dependent delays and continuous delays） and feedback control. After that, by constructing a suitable Lyapunov functional, sufficient conditions which guarantee the existence of a unique globally asymptotic stable positive periodic solution of a kind of nonlinear feedback control ecosystem are obtained. Our results extend and improve the existing results, and have further applications in population dynamics.     

Elements on the Concept and Design of a Tracked Mini Robot – “ROBO GENIU” – Destined for Special Applications

The authors of this paper aim to highlight issues related to the organology and the integration of the hardware component in the mechanical structure of a tracked mini robot, called Robo Geniu, part of the unmanned ground vehicles category having the ability to act autonomously and enabling its endowment with means of observation, listening, tapping, relaying and jamming. This paper reveals, in detail, the composing parts of the hardware component, as well as the way they are assembled in the mechanical structure of the mini robot under study. (© 2013 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim)     

On the Permanence of a Nonautonomous Nicholson＇s Blowflies Model with Feedback Control and Delay

A nonautonomous Nicholson＇s Blowflies model with feedback control and delay is investigated in this paper. We show that for this system, feedback control variable has no influence on the persistent property of the system.     

Statistical Structural Integrity Control of Composite Structures Based on an Automatic Operational Modal Analysis — a Review

Mechanics of Composite Materials - The operational modal analysis (OMA), as a passive technique, has found a practical application in the structural health monitoring (SHM) of structures in service...     

Object-oriented Design of Reusable Model Libraries of Hybrid Dynamic Systems – Part One: A Design Methodology

An object-oriented methodology for the design of reusable model libraries, dedicated to the composition of hybrid simulation models, is proposed. It takes into consideration all the phases of the library life cycle: design, programming, maintenance, modifications, extension, etc. The methodology distinguishes between the role of the library designers and the role of the library users. One of its main goals is guaranteeing that the users are able to use the libraries without having to know their internal details. In particular, users should not be confronted with numerical problems. The library designers should guarantee the numerical efficiency of the models based on the library predefined-models. In this respect, some of the numerical aspects of the model library design are discussed. The concept of library design rules is introduced as the cornerstone of the proposed methodology.     

Object-oriented Design of Reusable Model Libraries of Hybrid Dynamic Systems – Part Two: A Case Study

A novel object-oriented methodology for the design of model libraries is exemplified by means of the design of JARA. JARA is a set of libraries of dynamic hybrid models of some fundamental physical-chemical principles. Its main application field is the modeling of physical-chemical processes in the context of automatic control. Only a reduced set of phenomena has been selected for modeling, focusing mainly on illustrating relevant aspects of the proposed design methodology. The five steps of the design methodology are followed and the design rules of JARA are obtained.     

Memetic Algorithms for Multiple Interference Cancellations of Linear Array Based on Phase-Amplitude Perturbations

A novel method based on the memetic algorithm for the design of multiple interference cancellations of a linear array antenna by phase-amplitude perturbations is proposed. The adaptive array antenna is capable of sensing the presence of interference sources and suppressing the interferences in the interfering directions. This technique can increase the signal-to-interference ratio. The memetic algorithm is applied to find the weighting vector which makes the pattern nulling optimization of the proposed adaptive antenna. This technique is also able to do the cancellation of multiple interferences for different incident directions.     

A Minimum Residual Based Gradient Iterative Method for a Class of Matrix Equations

In this paper, we present a minimum residual based gradient iterative method for solving a class of matrix equations including Sylvester matrix equations and general coupled matrix equations. The iterative method uses a negative gradient as steepest direction and seeks for an optimal step size to minimize the residual norm of next iterate. It is shown that the iterative sequence converges unconditionally to the exact solution for any initial guess and that the norm of the residual matrix and err...     

Some Properties of A Lack-of-Fit Test for a Linear Errors in Variables Model

The relationship between the linear errors-in-variables model and the corresponding ordinary linear model in statistical inference is studied. It is shown that normality of the distribution of covariate is a necessary and sufficient condition for the equivalence. Therefore, testing for lack-of-fit in linear errors-in-variables model can be converted into testing for it in the corresponding ordinary linear model under normality assumption. A test of score type is constructed and the limiting chi-squared distribution is derived under the null hypothesis.Furthermore, we discuss the power of the test and the choice of the weight function involved in the test statistic.     

A Comtrol Model of Linear Fuzzy Silf-Regression

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