Applied sciences

Bulletin of the Polish Academy of Sciences: Technical Sciences

Content

Bulletin of the Polish Academy of Sciences: Technical Sciences | 2008 | vol. 56 | No 4 |

Abstract

Spectral properties of nonnegative and Metzler matrices are considered. The conditions for existence of Metzler spectrum in dynamical systems have been established. An electric RL and GC ladder-network is presented as an example of dynamical Metzler system. The suitable conditions for parameters of these electrical networks are formulated. Numerical calculations were done in MATLAB.

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Abstract

A new concept (notion) of the practical stability of positive fractional discrete-time linear systems is introduced. Necessary and sufficient conditions for the practical stability of the positive fractional systems are established. It is shown that the positive fractional systems are practically unstable if corresponding standard positive fractional systems are asymptotically unstable.

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Abstract

New frequency domain methods for stability analysis of linear continuous-time fractional order systems with delays of the retarded type are given. The methods are obtained by generalisation to the class of fractional order systems with delays of the Mikhailov stability criterion and the modified Mikhailov stability criterion known from the theory of natural order systems without and with delays. The study is illustrated by numerical examples of time-delay systems of commensurate and non-commensurate fractional orders.

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Abstract

Simple new necessary and sufficient conditions for asymptotic stability of the positive linear discrete-time systems with delays in states are established. It is shown that asymptotic stability of the system is equivalent to asymptotic stability of the corresponding positive discrete-time system without delays of the same size. The considerations are illustrated by numerical examples.

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Abstract

The paper presents the stability problem of control systems composed of a fractional-order PI controller and a inertial plant of a fractional order with time delay. Simple and efficient computational method for determining stability regions in the controller and plant parameters space is given. Knowledge of these regions permits tuning of the fractional-order PI controller. The method proposed is based on the classical D-partition method.

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Abstract

In the present paper finite-dimensional dynamical control systems described by semilinear ordinary differential state equations with multiple point delays in control are considered. It is generally assumed, that the values of admissible controls are in a convex and closed cone with vertex at zero. Using so-called generalized open mapping theorem, sufficient conditions for constrained local relative controllability near the origin are formulated and proved. Roughly speaking, it will be proved that under suitable assumptions constrained global relative controllability of a linear associated approximated dynamical system implies constrained local relative controllability near the origin of the original semilinear dynamical system. This is generalization to the constrained controllability case some previous results concerning controllability of linear dynamical systems with multiple point delays in the control and with unconstrained controls. Moreover, necessary and sufficient conditions for constrained global relative controllability of an associated linear dynamical system with multiple point delays in control are discussed. Simple numerical example, which illustrates theoretical considerations is also given. Finally, some remarks and comments on the existing results for controllability of nonlinear dynamical systems are also presented.

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Abstract

In the paper the parallel compensator considered in [1] is applied to control of the plants with delay and compared with Smith predictor. It is noted that Smith predictor removes only the delay, while the parallel compensator also changes the dynamics of the replacement plant; the latter may be in some degree of freedom shaped by the designer. Owing to this the transients of the system with parallel compensator are significantly faster. Accounting implementability, the control saturations are introduced in control algorithms. Additionally it is shown that using parallel compensator we may apply a relay control to the plants with delay and nonminimum phase zeros, which is impossible by using Smith predictor. Several results of simulations are described which confirm these observations.

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Abstract

Together with the dynamic development of modern computer systems, the possibilities of applying refined methods of nonparametric estimation to control engineering tasks have grown just as fast. This broad and complex theme is presented in this paper for the case of estimation of density of a random variable distribution. Nonparametric methods allow here the useful characterization of probability distributions without arbitrary assumptions regarding their membership to a fixed class. Following an illustratory description of the fundamental procedures used to this end, results will be generalized and synthetically presented of research on the application of kernel estimators, dominant here, in problems of Bayes parameter estimation with asymmetrical polynomial loss function, as well as for fault detection in dynamical systems as objects of automatic control, in the scope of detection, diagnosis and prognosis of malfunctions. To this aim the basics of data analysis and exploration tasks - recognition of outliers, clustering and classification - solved using uniform mathematical apparatus based on the kernel estimators methodology were also investigated

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Abstract

The paper considers a digital design of time-invariant systems in the case of step-invariant (ZOH), bilinear (Tustin's) and fractional order hold (FROH) discretization methods. The design problem is formulated as linear matrix inequalities (LMI). A closed-loop stability of the digitally designed control systems is discussed.

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Abstract

This paper presents a brief survey of our research in which we have used control theoretic methods in modelling and control of cancer populations. We focus our attention on two classes of problems: optimization of anticancer chemotherapy taking into account both phase specificity and drug resistance, and modelling, and optimization of antiangiogenic therapy. In the case of chemotherapy the control action is directly aimed against the cancer cells while in the case of antiangiogenic therapy it is directed against normal cells building blood vessels and only indirectly it controls cancer growth. We discuss models (both finite and infinite dimensional) which are used to find conditions for tumour eradication and to optimize chemotherapy protocols treating cell cycle as an object of control. In the case of antiangiogenic therapy we follow the line of reasoning presented by Hahnfeldt et al. who proposed to use classical models of self-limiting tumour growth with variable carrying capacity defined by the dynamics of the vascular network induced by the tumour in the process of angiogenesis. In this case antiangiogenic protocols are understood as control strategies and their optimization leads to new recommendations for anticancer therapy.

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Abstract

This article describes queueing systems and queueing networks which are successfully used for performance analysis of different systems such as computer, communications, transportation networks and manufacturing. It incorporates classical Markovian systems with exponential service times and a Poisson arrival process, and queueing systems with individual service. Oscillating queueing systems and queueing systems with Cox and Weibull service time distribution as examples of non-Markovian systems are studied. Jackson's, Kelly's and BCMP networks are also briefly characterized. The model of Fork-Join systems applied to parallel processing analysis and the FES approximation making possible of Fork-Join analysis is also presented. Various types of blocking representing the systems with limited resources are briefly described. In addition, examples of queueing theory applications are given. The application of closed BCMP networks in the health care area and performance evaluation of the information system is presented. In recent years the application of queueing systems and queueing networks to modelling of human performance arouses researchers' interest. Hence, in this paper an architecture called the Queueing Network-Model Human Processor is presented.

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Abstract

This paper gives the simple algorithm for calculation of the degree and coefficients of the minimal polynomial for the complex matrix A = [aij]n x n .

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Abstract

Embedded software and dedicated hardware are vital elements of the modern world, from personal electronics to transportation, from communication to aerospace, from military to gaming, from medical systems to banking. Combinations of even minor hardware or software defects in a complex system may lead to violation of safety with or even without evident system failure. a major problem that the computing profession faces is the lack of a universal approach to unite the dissimilar viewpoints presented by computer science, with its discrete and mathematical underpinnings, and by computer engineering, which focuses on building real systems and considering spatial and material constraints of space, energy, and time. Modern embedded systems include both viewpoints: microprocessors running software and programmable electronic hardware created with an extensive use of software. The gap between science and engineering approaches is clearly visible in engineering education. This survey paper focuses on exploring the commonalities between building software and building hardware in an attempt to establish a new framework for rejuvenating computing education, specifically software engineering for dependable systems. We present here a perspective on software/hardware relationship, aviation system certification, role of software engineering education, and future directions in computing.

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Abstract

Information Technologies (IT) are most and most important factor in economical and social development of particular countries and of the whole world, therefore we often think and told about so called Information Society (IS) as a new form of socio-economical organization of the society. Most properties of IT are profitable for the people and most features of IS are positive. Nevertheless we can find also some problems arising because of too fast development of IT and some dangers connected with increasing dependability of present society on IT devices and services. In the paper selected problems connected with distance teaching and distance learning (so called elearning) are pointed out and considered. As a most important problem so called "information smog" is pointed. It is very troublesome at present and may be source of big problem in the future.

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Editorial office

Editor-in-Chief:

T. Kaczorek, Warsaw University of Technology

Deputy Editor-in Chief:

M.P. Kazmierkowski, Warsaw University of Technology
A. Rogalski, Division IV Technical Sciences PAN

Board of Co-editors:

Artificial and Computational Intelligence
S. Osowski and B. Sawicki, Warsaw University of Technology


BiomedicalEngineering and Biotechnology
A. Liebert and R. Maniewski, Institute of Biocybernetics and Biomedical Engineering PAN

 

Civil Engineering
L. Czarnecki, Building Research Institute, ITB, Warsaw


Control,Robotics and Informatics
J. Klamka and A. Babiarz, Silesian Technical University

A. Borkowski, Institute of Fundamental Technological Research PAN

Electronics, Telecommunication and Optoelectronics
M. Mrozowski and A. Lamęcki, Gdansk University of Technology

W. Woliński, Warsaw University of Technology


Mechanical and Aeronautical Engineering, Thermodynamics
A. Styczek, and A. Tylikowski, Warsaw University of Technology


MaterialsScience and Nanotechnology
B. Major and P. Czaja, Institute of Metallurgy and Materials Science PAN
T.A. Kowalewski and B. Blachowski, Institute of Fundamental Technological Research PAN

PowerSystems and Power Electronics
M.P. Kazmierkowski, Warsaw University of Technology

International Editorial Advisory Board

I.V. Alexandrov, Ufa State Aviation Technical University, Russia
R. Asthana, University of Wisconsin-Stout, Menomonie, USA
Xu Binshi, China Association of Plant Engineering, Beijing, P.R. China
F. Blaabjerg, Aalborg University, Denmark

C. Cecati, University of L’Aquila, Italy

A. Cichocki, RIKEN Institute, Tokyo, Japan

M. David, National Polytechnique de Toulouse, France
R. Ebner, Materials Centre Leoben, Leoben, Austria
E. Fornasini, University of Padova, Padova, Italy

L.G. Franquelo, University of Seville, Spain

M. Gad-el-Hak, Virginia Commonwealth University, Richmond, USA

D. van Gemert, Catholic University Leuven, KU Leuven, Belgium

L. Keviczky, Hungarian Academy of Sciences, Budapest, Hungary
V. Kučera, Czech Technical University in Prague, Prague, Czech Republic

R. Kennel, Technical University Munich, Germany

E. Levi, Liverpool John Moore University, UK
G. Maier, Technical University of Milan, Milan, Italy

K.F. Man, City University of Hong Kong,
H.A. Mang
, Austrian Academy of Sciences, Vienna, Austria
H. Mihashi, Tohoku University, Aoba-ku, Sendai, Japan
S. Mindess, University of British Columbia, Vancouver, Canada
D.A. Mlynski, University of Karlsruhe, Karlsruhe, Germany
A.S. Nowak, University of Michigan, Ann Arbor, USA

K. Ohnishi, Keio University, Yokohama, Japan
A. Öberg, Linköping University, Linköping, Sweden

W. Pedrycz, University of Alberta, Canada
S. Przemieniecki, University of South Florida, Tampa, USA
M. Razeghi, Northwestern University, Evanston, USA
J. Rodriguez, Technical University of Federico Santa Maria, Valparaiso, Chile
J.V. Sloten, Catholic University Leuven, Leuven, Belgium

B.M. Wilamowski, University of Auburn, Alabama, USA
W. Włosiński, Warsaw University of Technology, Warsaw, Poland
A.L. Yarin, University of Illinois at Chicago, USA

Du Xiangwan, Chinese Academy of Engineering, China
J. Żurada, Department of Computer Engineering, University of Louisville, USA

Contact

Editorial Office:
Pałac Kultury i Nauki,
Wydział IV PAN,
PL 00-901 Warszawa
tel.: +48(22) 182 60 45
Mrs Ewa Trojanowska
e-mail: bulletinpas.et@gmail.com

Instructions for authors

About the Journal

The Bulletin of the Polish Academy of Sciences: Technical Sciences (Bull.Pol. Ac.: Tech.) is published by the Division IV Engineering Sciences of the Polish Academy of Sciences. The journal is peer‐reviewed and is published both in printed and electronic form (
http://czasopisma.pan.pl/dlibra/journal/95347).It is established for the publication of original high quality papers from multidisciplinary Engineering sciences with the following topics preferred:

• Artificial and Computational Intelligence,
• Biomedical Engineering and Biotechnology,
• Civil Engineering,
• Control, Informatics and Robotics,
• Electronics, Telecommunication and Optoelectronics,
• Mechanical and Aeronautical Engineering, Thermodynamics,
• Material Science and Nanotechnology,
• Power Systems and Power Electronics.

 

General data:

 

Format of the journal – A4 printed and electronic form,

Paper type – thick (chalk overlay) paper,

Colourfulness – full colour at an extra charge,

The volume of the journal – 250 pages (ca 30 papers) + 4 cover pages,

Frequency of publication – quarterly,

ISSN: 0239-7528 (print version),

ISSN: 2300-1917 (on line version),

DOI: 10.24425/bpasts

 

Abbreviations/Acronym:

 

Journal citation: Bull. Pol. Ac.: Tech.

ISO: Bull. Pol. Acad. Sci.-Tech. Sci.,

JCR Abbrev: B POL ACAD SCI-TECH

Acronym in the Editorial System: BPASTS

 

Journal Metrics:

 

JCR Impact Factor 2018:                                                                 1.361

5 Year Impact Factor: 1.323
SCImago Journal Rank (SJR) 2017:                                                 0.319
Source Normalized Impact per Paper (SNIP) 2017:                     1.005
CiteScore 2017:                                                                              1.27

The Polish Ministry of Science and Higher Education 2017:      25 points

Manuscript types:

Invited reviews presenting the state of the knowledge and/or devoted to novel topics,
• Refereed research papers reporting on original scientific or technological achievements,
• Refereed papers in special issues/sections serving as conference proceedings arranged by guest editors.

 

Submission Policy

 

All manuscripts submitted for publication should be original. Manuscripts published or under consideration for publication elsewhere should not be submitted and will not be considered. Submission of a paper implies that it has not been published previously, that it is not under consideration for publication elsewhere, a, nd that if accepted it will not be published elsewhere in the same form, in English or in any other language, without the written consent of the Publisher.

 

 Manuscript submission for review


The Bull. Pol. Ac.: Tech is now employing a Web-based manuscript submission and peer-review tracking system called Editorial System. Authors must submit their manuscript electronically on the web
http://www.editorialsystem.com/bpasts/. From this entry page, access can be obtained to all information required for the submission of a manuscript. First‐time users must create an Author’s account to obtain a user ID and password required to enter the system. All manuscripts receive individual identification codes that should be used in any correspondence with regard to the publication process. For the authors already registered in the Editorial System it is enough to enter their username and password to login as an author (Sign in). Author(s) will be notified about registration and manuscript review process by e-mail.
The manuscripts must be uploaded as a single PDF file.
If you experience difficulties with the manuscript submission website, please contact the Editorial Office of the Bull. Pol. Ac.: Tech (Mrs Ewa Trojanowska:
bulletinpas.et@gmail.com or Mrs Anna Jurkiewicz bulletinPAS@gmail.com).Names of authors and their affiliation should be removed from the manuscripts for the review process in order to have a fair evaluation of their manuscript. All authors of the manuscript are responsible for its content; they must have agreed to its publication and have given the corresponding author the authority to act on their behalf in all matters pertaining to publication. The Corresponding Author is responsible for informing the coauthors of the manuscript status throughout the submission, review, and production process.


 Manuscript preparation


1. The manuscript should be written in clear and concise English (UK version).

2. For manuscript preparation please use the Word or LaTeX template available in the Information for Authors on http://www.editorialsystem.com/bpasts/

3. Please remember, that in the .pdf version of the manuscript uploaded in the Editorial System for evaluation process, author(s) name(s) and affiliation should be removed.

4. Authors should consult a recent issue of the journal for style if possible.
 

Manuscript decision and Proofs:

Manuscript evaluations are assigned one of four outcomes: Accept, Minor Revisions, Major Revisions, and Reject. Manuscripts requiring "Minor Revision" not require a second review. All manuscripts receiving a "Major Revision" evaluation must be subjected to a second review. Rejected manuscripts are given no further consideration. Normally, manuscripts that receive a "Major Revision" decision have only one additional chance for revision and the revised version should be uploaded to the Editorial System within six weeks. If the author(s) failed to make satisfactory changes, the manuscript is rejected. On acceptance, manuscripts are subject to editorial amendment to suit house style.

Transfer of Copyright Agreement

Once the paper is initially accepted, the authors are assumed to have transferred the copyright of the paper to the publisher. Please fill the Form, available on the webpage
http://www.degruyter.com/view/supplement/s23001917_Open_Access_License.pdf

Sign it, and add to the final version of the manuscript as separate .pdf file.


Proofs will be sent to the author (first named author if no corresponding author is identified of multi-authored papers) and should be returned within48 hours of receipt.

Fees for printing the article

The Bulletin of the Polish Academy of Sciences: Technical Sciences (Bull.Pol. Ac.: Tech.) is published in Open Access, which means that all articles are available on the internet to all users immediately upon publication free of charge for the readers. Authors are invited so a declaration that they are ready to cover the costs of printing their article. In addition, each color page will be charged an additional fee according to the current cost of printing. Otherwise, the paper will be printed in black-white.

More details see in Information for Authors: http://www.editorialsystem.com/bpasts/

Open Access policy

The Bulletin of the Polish Academy of Sciences: Technical Sciences jest czasopismem wydawanym w wolnym dostępie na licencji CC BY-NC-SA 4.0.

The Bulletin of the Polish Academy of Sciences: Technical Sciences is an open access journal with all content available with no charge in full text version. The journal content is available under the licencse CC BY-NC-SA 4.

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