bluuebunny/crossref_metadata_2025_split huggingface dataset:
Concurrent software‐hardware optimisation of adaptive estimating, identifying and filtering systems
Authors: Platonov Anatoliy 
Published: June 2008

PurposeThe purpose of this paper is to present the methods of concurrent optimization of the analogue and digital parts (software‐hardware) of estimating, identifying and filtering systems with adaptively adjusted analogue parts – adaptive estimation systems (AES).Design/methodology/approachConcurrent (complete) optimization of AES permits the determination of the most efficient algorithms for computing the estimates and the controls adjusting analogue units of AES in the way maximally improving the quality of observations delivered by them to the digital part. Performance of AES is assessed by the mean square error (MSE) of estimates which is constructed employing the models of input excitation, analogue and digital parts. Global extremum of MSE is searched by Bayesian methods taking into account the always bounded input range of AES and its possible overloading.FindingsThere are determined upper boundaries of potentially achievable accuracy of estimates, as well as optimal estimating and controlling observation units' algorithms, ensuring their achievement. New effects appearing in completely optimal AES are analysed.Research limitations/implicationsThe paper presents the backgrounds of new and analytically complex approach. To clarify basic ideas and methods, the simplest but useful for applications single input‐single output and single input‐multiple output models of ASE were considered. The obtained results create wide field for further investigations.Practical implicationsThe results of the paper can be applied in the development of new classes of high‐efficient adaptive data acquisition, measurement, controlling, communication and other systems.Originality/valueConcurrent optimisation of AES is important task having no general solution until now. Known approaches allow only the separate optimisation of the analogue and digital parts. Presented original approach enables the correct formalisation and solution of this task that permits the design and realization of systems with characteristics close to theoretically achievable ones and exceeding the characteristics of the known systems of similar predestination.
High‐precision state feedback control systems for linear and non‐linear plants
Authors: Łozowicki Adam , Łozowicka Stupnicka Teresa , Łozowicka Dorota 
Published: June 2008

PurposeThe purpose of this paper is to provide the high‐precision robust control method for plants given by a high order of differential equations. This method is useful for linear and non‐linear plants. Considering the problem of minimization of energy consumed in the world is very important and very actual.Design/methodology/approachFor theoretical solving of the problem, the functional analysis and methods of the Banach spaces H2 and H∞ are used. Next the conditions for controllability with ε‐accuracy are given. For the non‐linear plants additionally two methods are used – method based on van der Schaft inequality and harmonically linearization.FindingsProvides state feedback control systems with sufficiently large gain (called Tytus feedback). Such systems can perform a high‐degree accuracy (called there ε‐accuracy).Practical implicationsThe considerations have many practical applications. For example, solving the problem of a high‐precision robust control for a ship track‐keeping and designing of a robust controller for a non‐linear two‐benchmark problem.Originality/valueThis is an original theoretical method of obtaining a high‐precision performance for feedback control systems. System presented in the paper enables controlling with ε‐accuracy the stable or unstable plants P described by high‐degree differential equations. Paper regards a robust control of stable as well as unstable plants with uncertainty.
On the market economy development parametrical regulation theory
Authors: Ashimov Abdykappar , Sagadiyev Kenzhegaly , Borovskiy Yuriy , Iskakov Nurlan , Ashimov Askar 
Published: June 2008

PurposeThe purpose of this paper is to offer the theory of a parametrical regulation of market economy development, and the results of the theory development and usage.Design/methodology/approachTheoretical results of the abstract have been obtained by way of applying the theory of ordinary differential equations, geometrical methods in variation tasks and the theory of dynamic systems. These results have been used for solving a number of practical tasks.FindingsThe market economy development parametrical regulation theory structure has been offered. The approach to parametrical regulation of a nonlinear dynamic system's development has been suggested. An assumption about the existence of solution to the task of calculus of variations on the choice of the optimum laws of parametrical regulation within the given finite set of algorithms has been set forward. An assumption about the conditions sufficient for the existence of an extremal's bifurcation point of the task of calculus of variations on the choice of the optimum laws of parametrical regulation within the given finite set of algorithms is presented, formulated and proved. Theory application samples have been provided.Research limitations/implicationsFuture papers would be focused on studies of rigidness of other mathematic models of economic systems.Practical implicationsThe research findings could be applied to the choice and realization of an effective budget and tax as well as monetary and loan state policy.Originality/valueThe market economy development parametrical regulation theory has been offered for consideration for the first time.
RHC method for application to BMI‐based systems
Authors: Kawabe Tohru 
Published: June 2008

PurposeThe purpose of this paper is to present research in the area of control method for the man‐machine systems with brain machine interface (BMI). Concrete target system is, for instance, a car cruising system and so on.Design/methodology/approachThe improved receding horizon control (RHC) method for the sampled‐data systems and the adaptive digital‐to‐analog (DA) converter which has the way to switch the sampling functions according to the system status are used. The feature selection method based on the kernel support vector machines with the backward stepwise selection for the BMI signals are also used.FindingsThis paper proposes the new improved RHC method with the adaptive DA converter for the application of the BMI‐based systems. The proposed method is illustrated as useful and effective method for the systems to which switch of control laws is indispensable by the simulations.Research limitations/implicationsAlthough the proposed method is effective for the BMI‐based systems with switching of control laws, the faster algorithm for RHC will be need to apply to the man‐machine systems with the BMI in practical use.Practical implicationsThe basic concept or framework of the proposed method can be used for the real man‐machine systems with the BMI, for examples, car crusing systems, wheel‐chaired systems and so on.Originality/valueThe paper contributes to the development of the new effective control method for the BMI‐based man‐machine systems.
Worst‐case allocation algorithms in a complex of operations with interval parameters
Authors: Józefczyk Jerzy 
Published: June 2008

PurposeIn many decision‐making problems under parameter uncertainty, the most popular stochastic approach is not used because of its serious drawbacks. The purpose of this paper is to present another approach, which copes with the uncertainty of parameters. It uses a precise criterion evaluating a decision with respect to uncertain parameters. This precision by the maximum operator is performed on a term based on the criterion and called the relative regret. The approach is applied to the allocation problems in a complex of operations.Design/methodology/approachThe resource allocation problems in a complex of operations of independent and dependent structures to minimize a total execution time of all operations are investigated. Then, the results are extended for the problem of a task allocation in the complex of independent operations. The case is considered when the parameters in the functional models of the operations are uncertain, and their values belong to the intervals of known bounds. The solution algorithms for the uncertain problems are based on known solution algorithms for the corresponding deterministic problems. The solution algorithms for the latter problems are outlined in the paper.FindingsThe main contribution of the paper consists in presenting the property that it is possible for the uncertain problems considered to replace the solution of the uncertain allocation problems by solving a number of corresponding deterministic problems.Research limitations/implicationsThe useful and interesting property of the solution algorithm for the allocation problems, in general, cannot be applied to the other decision‐making problems under uncertainty. As an example of such a problem, a simple routing‐scheduling problem is presented for which, however, a number of possible parameter scenarios can be substantially limited.Practical implicationsThe allocation problems addressed in the paper have a variety of applications in computer systems and in manufacturing systems. Moreover, a lack of crisp values for the parameters in models of individual operations is rather common.Originality/valueThe paper extends previous results for the allocation problems in a complex of operations.
The challenges of the information society
Authors: Rudall B.H. , Mann C.J.H. 
Published: June 2008

PurposeThis paper aims to review current developments that have been initiated to meet the challenges of the information society.Design/methodology/approachThe approach takes the form of a general review and survey of selected research and development (R&D) topics.FindingsThe paper illustrates the multi‐ and trans‐disciplinary nature of cybernetics, systems and management sciences.Practical implicationsThe choice of reviews provides an awareness of the current trends in these areas of endeavour.Originality/valueThe reviews are selected from a global database and give a studied assessment of present‐day R&D initiatives.
Arabic calligraphy: phishing
Authors: Andrew Alex M. 
Published: June 2008

PurposeThis paper aims to discuss a computational facility for generating Arabic script with its traditional elegance. Reference is also made to computer analysis of historic Ottoman documents which, unlike modern Turkish, use Arabic script. The paper also seeks to note aspects of ancient Arabic science. An account is to be given of the menace of “phishing” for personal details through spam messages.Design/methodology/approachThe approach is to review developments on the internet, especially those of general cybernetic interest.FindingsThe computer generation of Arabic script fills a need that has existed since the beginning of movable‐type printing. Retrieval of Ottoman documents is valuable historically and presents a technical challenge. Arabic science was in many ways more advanced than is widely realised.Practical implicationsPossibilities for computer typesetting are artistically and usefully extended. “Phishing” has to be seen as a serious menace.Originality/valueIt is hoped that this will be a valuable periodic review.
Principle of holography in complex adaptive systems
Authors: Shaduri Marina 
Published: June 2008

PurposeThis paper seeks to present a hypothesis that is based not only on theoretical considerations, but also on experimental and clinical data. The hypothesis concerns the holographic principle as the main principle that ensures formation and functioning of any complex adaptive system (CAS).Design/methodology/approachThe submitted paper represents the continuation of an article published in 2005 in Kybernetes. It substantiates the crucial role of holo‐diffraction in system‐genesis and system‐functioning. New experimental results are discussed and some parallels are also drawn between natural systems of various scales.FindingsA new physical phenomenon of holo‐diffraction is considered as the general principle of CAS organization.Research limitations/implicationsBiological holograms, emitted by various minor parts of the human body in specified conditions, allow in vivo and harmless imaging of various internal disorders. New approach to the study of complex adaptive (living) systems would help researchers to reveal some general laws and regulations of natural systems formation.Practical implicationsA new approach to the study of living systems that is based on parametric and visual analysis of emitted holograms is already used for medical purposes. Recently developed analytical software is being tested.Originality/valueThe paper contributes to the understanding of those principles which enable any CAS to integrate, control and organize its components while functioning.
On blocks and coverings based on semi‐equivalence relation in pansystems methodology
Authors: Wu Chen , Hu Xiaohua , Yang Jingyu 
Published: June 2008

PurposeThe purpose of this paper is to construct diverse granules and coverings derived from a semi‐equivalence class and then to reveal the relationships between granules and coverings and even relations, and to help one to study pansystems relations in a trans‐cross view.Design/methodology/approachForms regarding semi‐equivalence classes as primitives, blocks or granules such as tolerance class, join class, meet class, optimist/pessimist selected compatible class, and tolerantly kernel class in an incomplete information system are defined and compared. Different approximations are also introduced. Furthermore, diverse coverings are also suggested.FindingsA tolerance class of an object is proved to be the join of semi‐equivalence classes containing it, i.e. a result of acting union operation on some primitive classes. A compatibly kernel class of an object is a meet of semi‐equivalence classes including it, i.e. a result of acting intersection operation on some primitive classes. Related coverings can also be regarded as coverings derived from the covering consisting of primitive granules. Several necessary and/or sufficient conditions for a general covering to become a semi‐equivalence or complete covering are obtained. Meaningful property and relationship results are also exploited.Practical implicationsConstructing diverse granules naturally from an incomplete information system to form a different knowledge expression system looks promising for data mining in the information society. It widens the approach and schema.Originality/valueThe paper shows that the formation process of granules is natural, newly defined, and not similar and theoretic to those existing in a neighborhood system. The relationship between diverse granules and coverings is described by mathematical theorems in sufficient or necessary condition form.
A cybernetic approach to the problem of pouring flows
Authors: Guechi F. , Mekias H. 
Published: June 2008

PurposeThis study aims to calculate 2D free surface potential flow of a liquid poured from a container when the liquid runs along the underside of the spout.Design/methodology/approachThe effect of surface tension is taken into consideration and gravity is neglected. The solutions for the free‐surface profiles were computed numerically using a boundary‐integral equation.FindingsThe numerical computation shows that the solutions are found for different values of α and a train of capillary waves in the far field for 4.16≤α<10.Research limitations/implicationsNo solutions were found for α<4.16.Originality/valueThe study provides an application of the use of cybernetic methodology to a practical problem.
Economic yoyos, parasites and child labor
Authors: Lin Yi , Forrest Dillon 
Published: June 2008

PurposeIn the light of a recent systemic model, the yoyo model, this paper aims to look at how to show Bergstrom's Rotten Kid theorem as a simple corollary of earlier results along this line of work, explaining why transferable utility implies Becker's Rotten Kid theorem. It also aims to look at the relevant problem with child labor.Design/methodology/approachThe systemic yoyo model published earlier is the road‐map and foundation for the discussion. Since “as long as the benevolent head continues to contribute his income to all, other members are also motivated to maximize the family income,” as claimed by Becker's Rotten Kid theorem, the issue of child labor naturally comes into play. To this end, an example is constructed to show that the works of Baland and Robinson and Bommier and Dubois need to be fine‐tuned.FindingsThe paper provides a short and clean proof for Bergstrom's Rotten Kid theorem and, by linking to Buchanan's Samaritan's dilemma, the clouds surrounding the difficult situation can be penetrated with more clarity. More specifically, child labor and children's human capital accumulation should not be mutually exclusive, as Baland and Robinson and Bommier and Dubois had assumed.Originality/valueThe paper shows rigorously how Baland and Robinson and Bommier and Dubois need to be fine‐tuned in order to capture more of the published empirical findings.
Numerical expansion methods for solving Fredholm‐Volterra type linear integral equations by interpolation and quadrature rules
Authors: Yusufoğlu Elçin , Erbaş Barış 
Published: June 2008

PurposeThis paper sets out to introduce a numerical method to obtain solutions of Fredholm‐Volterra type linear integral equations.Design/methodology/approachThe flow of the paper uses well‐known formulations, which are referenced at the end, and tries to construct a new approach for the numerical solutions of Fredholm‐Volterra type linear equations.FindingsThe approach and obtained method exhibit consummate efficiency in the numerical approximation to the solution. This fact is illustrated by means of examples and results are provided in tabular formats.Research limitations/implicationsAlthough the method is suitable for linear equations, it may be possible to extend the approach to nonlinear, even to singular, equations which are the future objectives.Practical implicationsIn many areas of mathematics, mathematical physics and engineering, integral equations arise and most of these equations are only solvable in terms of numerical methods. It is believed that the method is applicable to many problems in these areas such as loads in elastic plates, contact problems of two surfaces, and similar.Originality/valueThe paper is original in its contents, extends the available work on numerical methods in the solution of certain problems, and will prove useful in real‐life problems.
Some characteristics of solutions of a class of rational difference equations
Authors: Dehghan Mehdi , Mazrooei‐Sebdani Reza 
Published: June 2008

PurposeThe aim of this paper is to study the global behavior of a higher order nonlinear difference equation.Design/methodology/approachThe character of semicycles, periodicity, global stability and boundedness of positive solutions of the mentioned difference equation are investigated.FindingsIt is deduced that, when q<1, then the positive equilibrium of this equation is globally asymptotically stable and, when q>1, then this difference equation possesses unbounded solutions.Originality/valueThe paper investigates some of the characteristics of nonlinear difference equations.
On neutrosophic topology
Authors: Gallego Lupiáñez Francisco 
Published: June 2008

PurposeRecently, Smarandache generalized the Atanassov's intuitionistic fuzzy sets (IFSs) and other kinds of sets to neutrosophic sets (NSs). Also, this author defined the notion of neutrosophic topology on the non‐standard interval. One can expect some relation between the intuitionistic fuzzy topology (IFT) on an IFS and the neutrosophic topology. This paper aims to show that this is false.Design/methodology/approachThe possible relation between the IFT and the neutrosophic topology is studied.FindingsRelations on neutrosophic topology and IFT are found.Research limitations/implicationsClearly, this paper is confined to IFSs and NSs.Practical implicationsThe main applications are in the mathematical field.Originality/valueThe paper shows original results on fuzzy sets and topology.
A new approach to the study of controlled systems
Authors: Bilbao‐Guillerna Aitor , de la Sen Manuel , Alonso‐Quesada Santiago 
Published: June 2008

PurposeThe purpose of this paper is to improve the transient response and the inter‐sample behavior of a model reference adaptive control system by an appropriate selection of the fractional order hold (FROH) gain β and the multirate gains used in the control reconstruction signal through a fully freely chosen reference model even when the continuous plant possesses unstable zeros.Design/methodology/approachA multiestimation adaptive control scheme for linear time‐invariant continuous‐time plant with unknown parameters is presented. The set of discrete adaptive models is calculated from a different combination of the correcting gain β in a FROH and the set of gains to reconstruct the plant input under multirate sampling with fast input sampling. Then the scheme selects online the model with the best continuous‐time tracking performance which includes a measure of the inter‐sample ripple, which is improved. The estimated discrete unstable zeros are avoided through an appropriate design of the multirate gains so that the reference model might be freely chosen with no constraints on potential unstable zeros.FindingsThe scheme is able to select online the discretization model with the best continuous‐time tracking performance without an appropriate initialization.Research limitations/implicationsThe switching mechanism among the different models should maintain in operation the active discretization model at least for a minimum residence time in order to guarantee closed‐loop stability. The inter‐sample behavior is improved, but it is not always completely removed.Practical implicationsThe transient response and the inter‐sample behavior are improved by using this multiestimation‐based discrete controller compared with a single estimation‐based one. The implementation of discrete controllers makes it easier and cheaper to implement and also more reliable than continuous‐time controllers.Originality/valueThe main innovation of the paper compared with previous background work is that the reference output is supplied by a stable continuous transfer function. Then the scheme is able to partly regulate the continuous‐time tracking error while the controller is essentially discrete‐time and operated by a FROH in general.