International Journal of Mathematics and Computers in Simulation

ISSN: 1998-0159
Volume 10, 2016

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 10, 2016

Title of the Paper: Application of Fuzzy Control to Residential Cogeneration with Renewable Energy Sources


Authors: Bartolomeo Cosenza, Michele Miccio

Pages: 390-398

Abstract: A fuzzy PI controller and a conventional PI controller were adopted to develop control for a residential cogeneration system made by a biomass-fired and solar-powered fluidized bed prototype. Its mathematical model is characterized by nonlinearities and, more important, by uncertainty and variability in parameters. The paper describes in detail the PI fuzzy controller, the development of which was based on the knowledge of the continuity diagrams of the process model. Then, the paper reports a comparison in simulation between the PI fuzzy controller and the conventional PI one. The PI fuzzy controller exhibits a superior performance, as far as both robustness and rate of response. As a result, the adoption of a PI fuzzy controller turns out the best choice for this residential cogeneration system and a favorable option for nonlinear processes with uncertain or time-varying parameters.

Title of the Paper: Fluctuations of Bacteriochlorophyll’s Positions in B850 Ring from Photosynthetic Complex LH2


Authors: Pavel Herman, David Zapletal

Pages: 381-389

Abstract: Interactions with environment have large impact on the properties of light–harvesting (LH) pigment–protein complexes. Some of these interactions could be modeled by different types of static disorder. Fluctuations of bacteriochlorophyll’s positions in B850 ring from LH2 complex of purple bacteria are investigated in present paper. The nearest neighbour approximation model of the ring is considered. Four modifications of such uncorrelated Gaussian static disorder type (fluctuations of radial positions of molecules on the ring, fluctuations of angular positions of molecules on the ring, fluctuations of molecular positions in perpendicular direction to the ring plane and fluctuations of molecular positions in arbitrary direction) are taking into account. The most important statistical properties of the nearest neighbour transfer integral distributions for different strengths of static disorder are calculated, discussed and compared.

Title of the Paper: Structural Modeling of a Historic Castle Using Close Range Photogrammetry


Authors: V. Barrile, G. Bilotta, E. D’ Amore, G. M. Meduri, S. Trovato

Pages: 370-380

Abstract: This paper presents a methodology for building surveying and structural modeling of buildings of monumental interest. The complex geometry of these structures requires appropriate techniques to support the diagnosis, health monitoring and structural analysis phases for the validation of the expected performance under future earthquakes. This study aims to investigate a low-cost technology to generate accurate 3D structural model of large historical buildings using photos taken by handheld digital cameras and commercial software. In this regard, a multidisciplinary approach, that integrates close-range digital photogrammetry and finite element analysis (FEM), is tested to the case study of a XV-XVI century masonry castle in southern Italy (Marina di Gioiosa Jonica, Reggio Calabria). Furthermore, to assess the accuracy of the modeling process the geometry of the generated model, we compared it against classical buildings surveying techniques. Finally, a linear FEM analysis is undertaken using the 3D model to show the potential of the adopted procedure for the purpose of structural analysis of a complex structure under earthquake loads.

Title of the Paper: B850 Ring from Photosynthetic Complex LH2 – Comparison of Different Static Disorder Types


Authors: Pavel Herman, David Zapletal

Pages: 361-369

Abstract: Properties of light–harvesting (LH) pigment–protein complexes are strongly influenced by their interactions with environment. These interactions could be modeled by static and dynamic disorder. Influence of static disorder on B850 ring from LH2 complex of purple bacteria is investigated in present paper. The nearest neighbour approximation model of the ring is considered. Four types of uncorrelated Gaussian static disorder (fluctuations of transfer integrals, fluctuations of radial positions of molecules on the ring, fluctuations of angular positions of molecules on the ring and fluctuations of directions of molecular dipole moments) are taking into account. The most important statistical properties of the nearest neighbour transfer integral distributions for different strengths of static disorder are calculated. Results obtained for four above mentioned types of static disorder are discussed and compared.

Title of the Paper: The Effects of Approximating a Probabilistic Process Using the Renewal Reward Theorem and the Optimal Solution of an EOQ Model with Quality


Authors: Noura Yassine

Pages: 354-360

Abstract: The renewal theory has been applied in various areas describing stochastic processes such as queueing systems and probabilistic inventory models. Numerous research studies incorporating quality into classical inventory models have made use of the renewal reward theorem to approximate the optimal solution. Application of the renewal reward theorem to an economic order quantity (EOQ) model with quality is examined by developing and comparing the exact and an approximate optimal solution. The EOQ model considered in this paper examines an inventory situation where items received are of two types of quality, perfect and imperfect. Moreover, the case when the supplier of these items offers a delay in payment is presented. The percentage of perfect quality items is assumed to be a random variable having a known probability distribution. Both types of items have continuous demand, and items of imperfect quality are sold at a discounted price. A mathematical model is developed and closed form formulas for the exact and the approximate optimal order quantity based on the renewal reward theorem are obtained. A numerical example is provided to illustrate the model and to compare the exact and approximate optimal solutions.

Title of the Paper: Inner Feedback Robust Control of a Laboratory Heat Exchanger


Authors: Libor Pekar, Roman Prokop

Pages: 345-353

Abstract: Controller design for a laboratory circuit heating plant with model feedback delays by means of a branched control system in a robust sense is the aim of this contribution. The reader is concisely acquainted with a mathematical model of then plant that includes all significant delays and latencies first; hence, the model is infinite-dimensional. Relevant algebraic tools, namely, a special ring quasipolynomial functions, Bézout identity and particular controller parameterizations for a feedback control system with additional inner loop follow. Although the controller structure is fixed, its parameters are eventually tuned by introduced robustness principles in order to meet robust stability and performance. For the practical implementation, rather complex controllers’ laws, which are of a delayed nature, are simplified by a rationalization and their discretetime formulation is suggested as well. The results are verified by simulations in MATLAB® and Simulink®. All the obtained results are promising for a future real-life implementation of the presented approach.

Title of the Paper: B-α/B-β Ring from Photosynthetic Complex LH4, Modeling of Absorption and Fluorescence Spectra


Authors: Pavel Heřman, David Zapletal

Pages: 332-344

Abstract: Absorption and steady state fluorescence spectra of B-α/B-β ring from the light-harvesting (LH) pigment-protein complex LH4 are investigated in this contribution. The geometric structure of some LH complexes is known in great detail, e.g. for the LH2 and LH4 complexes from purple bacteria. The properties of such complexes are strongly influenced by their interactions with environment. These interactions could be modeled by static and dynamic disorder. Different types of static disorder are considered and discussed. Resulting spectral profiles within full Hamiltonian model are presented and compared with our previous results within the nearest neighbour approximation model. Distribution of the quantity P_d2 _ that appears in the expression for steady state fluorescence spectrum is also studied. Comparison of the results for B-α/B-β ring from LH4 complex and B850 ring from LH2 complex is also done.

Title of the Paper: An Innovative Strategy for a Step-by-Step SFS Reconstruction Based on Variational Approach


Authors: Monica Carfagni, Luca Puggelli

Pages: 324-331

Abstract: The stylistic design of new industrial products often starts from shaded handmade sketches which, usually, need to be converted into 3D digital models by using CAD software packages for the subsequent design phases. This conversion often represents the bottleneck of the whole development process. Shape from Shading (SFS), which attempts to recover the 3D geometry of an object starting from a single shaded representation, is potentially capable of speeding-up the 3D conversion. However, existing approaches prove to be extremely unstable and error prone mainly due to the under-determination of the SFS problem. In order to increase the performance of shading based reconstruction authors propose a step-by-step variational-based approach. In particular, the problem is solved into multiple steps, each one providing the initialization for the following, so that the solution gradually converges towards the final surface. Tested against a set of case studies, the method proved its effectiveness.

Title of the Paper: Pareto-Ranking Efficient Method Using Dominance-Based Hasse Diagrams


Authors: André A. Keller

Pages: 310-315

Abstract: Let a complex multi-objective optimization problem for which we would like to determine near Pareto-optimal sets. Consider a finite set of feasible solutions at random. Performing all pairwise comparisons based on the concept of dominance, we can find which solutions are non-dominated. This subset defines the first rank of non-dominated solutions. Eliminating these solutions, we could repeat the procedure, and thus determine the next class of non-dominated solutions, and so forth. Using the same set of initial data, our method constructs and analyzes the ordinal structure of a directed acyclic graph by using Hasse diagrams. All the ranks of solutions are deduced simultaneously and define an efficient Pareto-ranking. A simple application of engineering optimization illustrates the method.

Title of the Paper: Error Reconstruction Functions of Non-Optimal Algorithms Based on Atomic Functions


Authors: Yair Olvera, Vladimir Kazakov, Sviatoslav Africanov

Pages: 302-309

Abstract: A non-optimal algorithm based on atomic function is investigated for the Sampling – Reconstruction Procedure (SRP) of Gaussian random process realizations. The reconstruction error function of this non-optimal algorithm is compared with the reconstruction error functions obtained in the optimal algorithm, represented by the conditional mean rule, and in another non-optimal algorithm based on Balakrishnan’s theorem. Results show that the application of atomic functions has disadvantages reflected in a larger magnitude of the reconstruction error.

Title of the Paper: Fuzzy Stochastic Approaches for Analysing the Serviceability Limit State of Load Bearing Systems


Authors: Zdeněk Kala, Abayomi Omishore

Pages: 294-301

Abstract: Different approaches for determining the degree of uncertainty in models for the analysis of the serviceability limit state of building structures are described. An example of fuzzy and stochastic analysis of the uncertainty of deformation of a load bearing steel truss structure is presented. The relationships between the force acting on the structure and the elastic deformation of the structure caused by this force are studied using numerical simulations on the computer. The static response and elastic deformation are evaluated using linear and geometrically nonlinear models. It is proven in the article that small uncertainties in the initial geometric imperfections can lead to relatively large uncertainty in the response of the model, on the basis of which the safety and reliability of the structure are assessed.

Title of the Paper: Efficient Transfer and Object-Relational Mapping of Data for Client-Server Applications through the Internet


Authors: P. Voborník

Pages: 288-293

Abstract: This article summarizes current approaches for the transmission of the data for the client-server applications which communicate via the public internet. On their basis an entirely new approach is proposed that ensures to minimize server load and maximize user comfort when working with a client application. This method encapsulates all operations into two class libraries, one of which operates on the server side and the second is integrated into the client application. Data are submitted to the client application in a clear object-oriented form, including references between them, only minimized and uncomplicated text strings are sent via the internet and these data are automatically stored on the server in a classic relational database. In addition to the data transfer this method also solves objectrelational mapping. Using the method presented in the article also brings comfort for applications developers and they can thus concentrate more on the development of application logic.

Title of the Paper: Pervasive Investigations of Trustworthiness over Diverse Orientations of Apportioned Heterogeneous Mobile Networks


Authors: Vinod Kumar Verma

Pages: 281-287

Abstract: Trust and reputation are the prime factors of concern for any apportioned system application nowadays. This paper focuses on the comprehensive evaluation of trustworthiness of apportioned peer to peer networks from a different facet. We developed over model incorporating two orientations namely: stationary and mobile networks. We highlighted the impact of power node augmentation factor along with collusion issue for power trust and reputation model. Moreover, we estimated over designated model over performance based issues like accuracy, pathlength and power consumption. Finally, the outputs converged from our investigation are the indicative to implement analytical exploration over heterogeneous apportioned mobile networks. Experimental setup through simulation proves the validity of our designated model for heterogeneous mobile networks.

Title of the Paper: Sizing Optimization of Sandwich Plate with Laminate Faces


Authors: E. Kormanikova, K. Kotrasova

Pages: 273-280

Abstract: The paper is focused on sandwich optimization subjected to the maximum displacement criterion. The optimization problem is based on the use of continuous design variables. Thicknesses of layers with the known layer orientation are used as design variables. The optimization problems with displacement constraints are formulated to minimize the sandwich weight. The designs of the final thickness of sandwich plate have to be rounded off to integer multiples of the commercially available layer thickness.

Title of the Paper: Posterior Analysis of the Compound Truncated Weibull Under Different Loss Functions for Censored Data


Authors: Khawla Boudjerda, Assia Chadli, Hocine Fellag

Pages: 265-272

Abstract: In this paper, the Bayesian analysis of right truncated Weibull distribution is considered under type II censored data. Bayes estimators and corresponding risks have been derived using symmetric and asymmetric loss functions. Bayesian estimators of the parameters have not explicit forms, so we cannot solve analytically and that's why we applied the Monte-Carlo methods to find the results, especially the Metropolis-Hastings algorithm. Finally, we use Pitman closeness criterion and integrated mean square error (IMSE) to compare Bayesian and likelihood estimators (MLE).

Title of the Paper: Higher-Order Approximations Methods for Global Sensitivity Analysis of Nonlinear Model Outputs


Authors: Zdeněk Kala

Pages: 260-264

Abstract: The article deals with the use of higher-order approximation polynomials and Latin Hypercube Sampling numerical simulation for the assessment of global sensitivity analysis of nonlinear model output. Highly effective computer evaluation of first and higher order sensitivity indices in non-additive systems is shown. The presented example of a non-additive system of a load-carrying structure was modelled using the nonlinear finite element method and assessed via variance-based sensitivity analysis. The presented sensitivity assessment allows exploration of all regions of the input space, accounting for interactions as well as nonlinear responses.

Title of the Paper: Techniques for Analysis of Auto-Id Applications for Sustainable Development


Authors: A. Gleser, O. Ondráček

Pages: 249-259

Abstract: This paper deals with techniques for analysis of Auto-ID applications for sustainable development. The design of a new method for process visualization specialized for Auto-ID projects is to be found after the introduction and the problem formulation of this paper. Existing process visualization methods are not taking into account all aspects, which need to be considered for a complete process recording. Especially Auto-ID projects often have many interfaces and connections to other IT-systems, which result in the need for a complete and easy-to-understand process visualization. Also key figures for quantification and comparability among different projects are developed. Afterwards the new development method is applied on two strong different case studies to cover a wide range of application to test if the developed method is versatile usable. The second presented technique in this paper is the reasonable degree of visibility, which is defined mathematically as well as applied on the two case studies. The goal with reasonable degree of visibility is to find the point where increasing the visibility causes more costs than saving costs respectively than generating benefit.

Title of the Paper: Simulation of the Highest Insured Catastrophe Losses Using Quantile Function


Authors: V. Pacáková, P. Jindrová

Pages: 242-248

Abstract: Catastrophe modelling and simulations are risk management tools using computer technology to help insurers, reinsurers and risk managers better assess the potential losses caused by natural and man-made catastrophes. This article aims to present methods for modelling and simulation of extreme insured losses using quantile function based on data caused the world natural catastrophes in time period 1970-2014, published in Swiss Re Sigma No2/2015. Our interest focuses particularly on the extreme observations in the upper tail of loss distributions. We have shown that it is possible to simulate the losses in upper tail of distribution without simulating the central values. This advantage will be used for simulation a few values of the highest insured losses in the world's natural catastrophes in the future.

Title of the Paper: Discrete Prediction and Sliding Mode Control for Multivariable Systems


Authors: Houda Ben Mansour, Khadija Dehri, Ahmed Said Nouri

Pages: 232-241

Abstract: This paper deals with the development of two strategies of control, for multivariable systems, combining Sliding Mode Control (SMC) and Model Predictive Control (MPC). This is an extension of our previous works synthesized in the case of single input single output. The first proposed controller is the Sliding Mode Control with Predictive Sliding Function (SMCPSF) and the second proposed controller is the Predictive Sliding Mode Control (PSMC). These types of scheme improve the performances of the SMC and the MPC. Simulation results demonstrate that the (SMC-PSF) and (PSMC) give better performances, for multivariable systems, in terms of strong robustness to external disturbance and parameters variation, chattering elimination and fast convergence, in comparison with the SMC. In comparison between each other, the SMC-PSF in better then the PSMC, at the presence of hard parameter variation.

Title of the Paper: Analysis of Pixels in the Region of Interest Using Efficient Segmentation Methods and Heat Prediction for Focused Ultrasound Interventions


Authors: P. Revathy, V. Sadasivam

Pages: 226-231

Abstract: Lesion detection is a challenging task in the field of cancer imaging. In this research paper three efficient segmentation techniques are discussed to find the accurate Region of Interest (ROI). Image of liver cancer is taken for analysis. A new heat prediction method has been proposed and pixel wise heat prediction is done after applying the best method of segmentation. The heat prediction is done for High Intensity Focused Ultrasound (HIFU) interventions to treat cancer tissue by applying various ranges of heat intensities to ablate the tumor. The heat to be applied is compared for basic Pennes Bio-heat transfer equation (PBHTE) and the proposed heat prediction method.

Title of the Paper: Programming Courses Reflecting Students’ Aptitude Testing and Implementing Learning Style Preferences Research Results


Authors: Eva Milková, Karel Petránek

Pages: 218-225

Abstract: An essential part of studies at faculties preparing students in the area of computer science is the development of student’s programming skills. Despite a heroic academic effort and many different theoretical researches which deal with the question of how to develop these skills, a substantial minority of students fail introductory programming course. We observed this fact at our university and noticed it is similar to other universities. To change this disadvantageous situation we aimed our attention at a research concerning students’ programming capabilities evaluation with regard to the input Dehnadi’s test focused on programming aptitude. Within research most often students’ mistakes have been deeply examined and study materials have been innovated. The paper describes our research and introduces an innovative study material successfully supporting student?s programming skills development.

Title of the Paper: Modeling of Emission and Absorption Spectra of LH2 Complex (B850 and B800 Ring) - Full Hamiltonian Model


Authors: Pavel Herman, David Zapletal

Pages: 208-217

Abstract: Simulated absorption and steady state fluorescence spectra for the model of peripheral cyclic antenna unit LH2 from purple bacteria are presented. The spectra for more complex system (B850 and B800 ring) are calculated within full Hamiltonian model and these results are compared with the previuos ones calculated within the nearest neighbour approximation model. Dynamic disorder, interaction with phonon bath, in Markovian approximation simultaneously with uncorrelated static disorder in local excitation energies are taking into account in our simulations. The cumulant-expansion method of Mukamel et al. is used for the calculation of spectral responses of the system with exciton-phonon coupling. The localization of exciton states is also investigated.

Title of the Paper: Mathematical Modeling and Simulation of the Collagen Protein Hydrolysis Process


Authors: H. Vaskova, K. Kolomaznik, R. Matusu

Pages: 202-207

Abstract: This paper is focused on the mathematical model for alkaline hydrolysis of leather shavings. Leather industry produces annualy a large amount of wastes. For the environment-friendly solution the processing of certain part of wastes arising from the leather industry is reasonable to utilize hydrolysis processes. Collagen protein contained in e.g. leather shavings can be further effectively processed. The description of the hydrolysis process is based on the linearized state model. The mathematical-physical model is built on the mass balance of the input substances and the resulting hydrolysate protein, moreover on an enthalpy balance for the reaction mixture and saturated steam serving in reactor as the heat transfer medium. The simulations of the protein hydrolysis process model are performed in Matlab Simulink and are closely discussed in the paper.

Title of the Paper: Theoretical Bases of Modeling of Nanostructures Formed from the Gas Phase


Authors: A. Vakhrushev, A. Fedotov, V. Golubchikov

Pages: 192-201

Abstract: The mathematical model of condensation processes of nanoparticles from a gas phase is submitted for nanoaerosol and nanocomposite systems. The determination method of mechanical and structural nanoparticles properties is proposed. Theoretical analysis of composites elastic characteristics including nanoparticles is carried out. Calculation results of metals nanoparticles formation at vacuum evaporation and condensation are given. Numerical and structural properties of forming nanoobjects is examined. Dependences of structural behavior for nanoobjects and composites on basis of its are obtained. Research is carried out for the processes of aerosol and nano composite systems

Title of the Paper: Configuration Frameworks


Authors: P. Voborník

Pages: 180-191

Abstract: The traditional object-oriented programming frameworks are currently the most widely used method for creating large information systems. Configuration frameworks are their alternative or rather an extension, which are not yet widespread in practical use for desktop applications, despite their huge potential. This innovative method offers many advantages, such as deployment of new modules and whole versions without reinstallation on workstations and disrupting business, easy iterative development and maintenance etc. The paper presents this original approach on a concrete example of the test management administration interface and also shows possibilities of analogical processing other similar systems. Using a technology of the configuration framework for the development of a such systems could bring significant benefits to developers and to users, e.g. easy and fast installation and updates, low memory requirements, small application size, easy system maintenance without necessity of experts etc. As this article illustrates, creating of a unique completely original configuration framework for any specific needs is not so difficult, and it is worthwhile in many cases due to the subsequent savings.

Title of the Paper: Derivation of a Single-Step Hybrid Block Method with Generalized Two Off-Step Points for Solving Second Order Ordinary Differential Equation Directly


Authors: Ra’ft. Abdelrahim, Zurni Omar

Pages: 171-179

Abstract: This paper proposes a single-step hybrid block method with generalized two off-step point for the direct solution of initial value problem of second order ordinary differential equations. The uses of power series approximate solution as an interpolation polynomial at the off points is employed in developing this method, while its second derivative is collocated at all points in the interval. Furthermore, some basic properties of the generalized method such as order, zero stability, consistency and convergence are also established. In addition, two examples of specific points of the developed method are considered to solve some initial value problems of second order ordinary differential equations. The numerical results confirm that the proposed method produces better accuracy if compared with the existing methods.

Title of the Paper: Maple Algorithm for Damping Quality of Anechoic Chambers Evaluation


Authors: Martin Pospisilik, Rui Miguel Soares Silva, Milan Adamek

Pages: 161-170

Abstract: Anechoic and semi anechoic chambers are among the necessary equipment that is needed for testing of devices for their electromagnetic compatibility or for experiments with electromagnetic field emitters, receivers, shielding and many more devices. As they require shielding for their proper operation, undesirable reflections occurring inside them are a natural consequence that must be eliminated by suitable absorbers. Naturally, the reflections cannot be eliminated absolutely in any case, but the aim of the constructers of such chambers is always to minimize them as well as possible. As the constructions of the chambers differ, each of them shows different resonant frequencies and standing waves displacement, although it complies with the standards for electromagnetic compatibility measurement. This phenomenon increases in its importance when the chamber is intended to be used for scientific purposes. In some cases, the knowledge of its behavior is crucial for various experiments. Because the standing waves caused by the reflections inside the chamber manifest themselves as resonant peaks occurring in the frequency response measurement, one of the possibility of evaluation of the quality of the reflections’ damping is to identify the resonant peaks and calculate the Q-factor of the chamber, considering it acts as a cavity resonator. As cavity resonators usually show very high Q-factors, the lower value is obtained, the better damping by the absorbers in the chamber is ensured. One of such approaches to evaluate the real chamber that is being operated at Tomas Bata University in Zlin, using an algorithm implemented in Maple software, is described within the framework of this paper.

Title of the Paper: The Common Solutions of Complementarity Problems and a Zero Point of Maximal Monotone Operators by Using the Hybrid Projection Method


Authors: Khanittha Promluangy, Pongrus Phuangphooz, Poom Kumamy

Pages: 152-160

Abstract: In this paper, we propose a projection method for solving nonlinear complementarity problems and a zero point of maximal monotone operators. Strong convergence theorems are established for solving the common solutions of complementarity problems and a zero point of maximal monotone operators together with a system of generalized equilibrium, variational inequality and fixed point problems in a uniformly smooth and 2-uniformly convex real Banach space. Moreover, we also apply the result to Hilbert spaces.

Title of the Paper: Computer Simulation of Satellite Data for Urban Expansion Analysis


Authors: M. S. Boori, K. Choudhary, V. A. Soifer, A. Sugimoto

Pages: 142-151

Abstract: Present research work illustrates computer simulation of satellite data and with socio-economic data such as population, migration and urbanization led problems related to quality of life in Samara city and derive landscape trajectory and urban expansion. Supervised classification methodology has been employed using maximum likelihood technique in ArcGIS 10.1 Software for five different time periods Landsat satellite imageries from 1975 to 2015. Four major land cover classes were observed: water, built-up, forest and grassland by classification. Then, land cover area for all classes in different years were simulated and coupled with population data. Results show that, urban expansion and built-up area is correlated with population of samara city with high speed of economic development. The present study revealed an increase in built-up by 37.01% from 1975 to 1995, than reduce - 88.83% till 2005 and an increase by 39.16% from 2005 to 2015, along with the increase in population, migration from rural areas owing to the economic growth and technological advantages associated with urbanization.

Title of the Paper: The Numerical Computation of Block Method for Direct Solution of Third Order Ordinary Differential Equations


Authors: J. O. Kuboye, Z. Omar

Pages: 133-141

Abstract: The computation of an accurate block method with step-length of eight for solving third order ordinary differential equations is discussed in this article. The method is developed via interpolation and collocation approach. The use of approximated power series as an interpolation polynomial and its third derivative as a collocation equation are adopted in developing the method. The new method is zero-stable, consistent, convergent and of order nine with small error constants. In addition, the method is applied as a block to third order initial value problems and the results generated are found better in accuracy when comparison was made with some existing methods.

Title of the Paper: Contributions to the Asymptotic Minimax Theorem for the Two-Armed Bandit Problem


Authors: A. V. Kolnogorov

Pages: 129-132

Abstract: The asymptotic minimax theorem for Bernoully twoarmed bandit problem states that the minimax risk has the order N1/2 as N→∞, where N is the control horizon, and provides lower and upper estimates. It can be easily extended to normal two-armed bandit. For normal two-armed bandit, we generalize the asymptotic minimax theorem as follows: the minimax risk is approximately equal to 0.637N1/2 as N→∞.

Title of the Paper: Approach to Effectiveness Evaluation of Robotics Technology in Mining Using Discrete Event Simulation


Authors: Vasily V. Sinoviev, Victor V. Okolnishnikov, Aleksey N. Starodubov, Mihail U. Dorofeev

Pages: 123-128

Abstract: This paper reports the approach to effectiveness evaluation of robotics technology in mining which encloses the identification of both the technologies best prepared for the robotic automation in terms of their complexity and sources of the effectiveness of robotic technology via computer model simulations.

Title of the Paper: Analysis and Proposal Motion of Robotic Manipulator System for Monitoring Luggage Compartment Including a Dynamic Analysis


Authors: J. Struška, M. Struška, M. Popelka

Pages: 118-122

Abstract: Article deals with motion control manipulator, whose motion states are derived and subsequently calculated by based on the equations of motion. By using these calculations are determined effects of the moving parts of the manipulator, including the effect on individual moving arms, and dynamic load prospective drives. The resulting potential and kinetic energy of system then used for derived and calculated equation of motion. Base on that is created conception and 3D structural model. This autonomous robotic system model find use for monitoring and identification suspicious objects in luggage compartments of transport vehicles.

Title of the Paper: Default Contagion in Financial Networks


Authors: Chiara Benazzoli, Luca Di Persio

Pages: 112-117

Abstract: The preset work aims at giving insights about how the theory behind the study of complex networks can be profitably used to analyse the increasing complexity characterizing a wide number of current financial frameworks. In particular we exploit some well known approaches developed within the setting of the graph theory, such as, e.g., the Erdos and Reny model, and the Barabasi-Albert model, as well as producing an analysis based on the evolving network theory. Numerical simulations are performed to study the spread of financial peak events, as in the case of the default of a single bank belonging to a net of interconnected monetary institutions, showing how the knowledge about the underlying graph theory can be effectively used to withstand a financial default contagion.

Title of the Paper: A Fractal World: Building Visually-Rich and Fully-Realistic Natural Environments


Authors: Costin A. Boiangiu, Adrian G. Morosan, Marian Stan

Pages: 100-111

Abstract: Is it possible to generate a fully-developed world which looks entirely realistic, is built randomly starting from a seed and using no data whatsoever? With this paper the authors try to give an answer to this question. A set of methods from the scientific literature blended with some newly-proposed ones will be employed to generate an entire planet using only fractals, procedural models, mathematically-described objects and constructive solid geometry. Elements such as vegetation, mountains, water, waves, rocky and sandy soil and clouds will be built. Perlin noise function is used as a scalable solution for water, terrain and cloud generation. Another proposed method is for vegetation distribution, based on roulette selection, a stage of genetic algorithms.

Title of the Paper: Effective Determining of the Degree of Similarity of Selected Properties of Objects through Characteristic Text Strings


Authors: Petr Voborník

Pages: 90-99

Abstract: The article illustrates the new unique coding method for describing the properties of different objects of the virtual and real world into the so-called characteristic text strings. The basic description of the object can be summarized into a very short text string by this method. These strings are comprised only of the basic characters of the alphabet and numbers and it is easily to readable by humans. These strings can be easily and very quickly compared with each other and determine mutual difference of described objects. Total and partial difference (differences in specific properties) may be calculated at any time. This enables us to easily find the object that is most dissimilar from or most similar to the pattern object. The whole principle of characteristic text strings is demonstrated on generating random elements in the test questions. Thanks to this principle, a complicated structure can be described of each randomly generated question by the short string. On the basis of this, such procedures can be suggested for repeatedly used questions that ensure generating of the most different version from versions used previously. The applicability is thus of each of the test questions maximized. Another area of use of characteristic text strings are then presented, such as web online shops, vehicle license plate, genetic algorithms, and more.

Title of the Paper: Transmission Loss Assessment and Optimization of an Intake System for Automotive Application


Authors: Siano D., Aiello R., D’Agostino D.

Pages: 82-89

Abstract: The acoustic project of internal combustion engine’s intake systems is a very important task aimed to ensure that a tradeoff between noise emissions and perceived sound quality is achieved. In general, the most used parameter for characterizing the performance of an acoustic filter is represented by the so called Transmission Loss which may be numerically evaluated thanks to a three-dimensional FEM code. In this paper, a FEM model of an intake system for a commercial spark ignition engine has been realized in order to simulate its acoustic performance in terms of Transmission Loss, without considering structural participation as well as the presence of mean flow inside the system. After a model validation, thanks to previous experimental analysis, an acoustic optimization procedure of the studied system has been carried out by means of geometry modifications.

Title of the Paper: Allocation of Students into Academic Programs Using Mathematical Programming


Authors: Nasruddin Hassan

Pages: 77-81

Abstract: A mathematical programming model is built to optimize the allocation of students into academic programs of a department. The mathematical programming model takes into account the limits of space capacity, financial allocation, the number of instructors and affirmative action quotas as goal constraints that are required to be fulfilled. Each constraint has a priority level and a weight attached. This goal programming model is then applied to the School of Mathematical Sciences, Universiti Kebangsaan Malaysia. The results of the preemptive goal programming model are then compared to that of the weighted non-preemptive goal programming model and current allocation using the weighted mean absolute percentage error. The successful application demonstrates the ability of the mathematical programming model to comply with the student intake requirement and goal constraints of the academic programs.

Title of the Paper: Technique Optimization of Holding Systems of Marine Floating Objects on the Basis of Numerical Modeling of their Behavior


Authors: Ilya Teslyaruk, Alexander Bolshev

Pages: 72-76

Abstract: In article, the technique optimization of holding systems of marine floating objects based on execution of serial mathematical experiments simulating the behavior of floating anchored structures under the influence of loads from wind, currents, waves and ices is expounded. Methodology components of mathematical simulation of behavior of floating anchored objects are described, procedures of enhancement of their holding systems, restrictions determined by safety of a construction and optimality criteria of holding systems are given.

Title of the Paper: Effective Hybrid Adaptive Temperature Control Inside Plug-Flow Chemical Reactor


Authors: Jiri Vojtesek, Petr Dostal

Pages: 63-71

Abstract: The paper deals with two methods of hybrid adaptive control of the nonlinear system represented by the plug-flow tubular chemical reactor. The mathematical model of this type of technological processes is described by the set of partial differential equations which were solved numerically by the finite difference method and Runge-Kutta’s method. The adaptivity of the controller is satisfied by the recursive identification of the external linear model as a linear representation of the originally high nonlinear controlled system. The first method uses well known Pole-placement method and the second is based on the more sophisticated LQ approach. The advantage of these method is that both have tuning parameter which can affect control results. Although the controlled system has highly nonlinear behavior, used adaptive controller has good results.

Title of the Paper: The Kinematic Behaviour of the Driver and the Degree of Injuries in Vehicle Frontal Collision


Authors: Oana V. Oţăt, Nicolae Dumitru, Victor Oţăt

Pages: 53-62

Abstract: The research study carried out within the present paper aims at determining the kinematic behaviour of the driver in vehicle frontal collision. The opening sections of the study put forward the overview of a statistical analysis on road accidents casuistry, so as to identify those specific types of collision leading to severe injuries. To achieve virtual testing we have used Virtual Crash software, thus simulating a frontal collision between a vehicle and a rigid wall at a 100% overlapping degree. The kinematic analysis of driver’s behaviour was completed by means of numerical modelling performed in the LS-DYNA software package. Under the circumstance, the influence of the vehicles’ passive safety has been considered in order to establish the injury degree. Hence, we have analysed four different situations: initially the driver is anchored with the seatbelt and the vehicle is equipped with airbags. Then, the passive safety elements were deactivated in turns, first the seatbelt and then the airbag. Subsequently, the forth situation will investigate the case in which the driver is not secured with any retaining system and the vehicle is not equipped with an airbag.

Title of the Paper: The Use of Method of Multidisciplinary Approach, Modeling and Simulation in Learning of Gear Ratios


Authors: Radek Nemec, Andrea Berkova, Stepan Hubalovsky

Pages: 46-52

Abstract: This paper presents the development of Set for Measuring the Transfer Gears and its use in science classes in conjunction with teaching computer technology supported by interactive geometric software. The goal of developing measurement transfer kits for gears demonstration of speed gears is to show the real speed of the individual gears in relation to the number of gears to pupils of science. For better understanding, the animations of gears, drawings of various kinds of gears and gear teeth in interactive geometry software were used. Several school science subjects were involved in this project and their collaboration resulted in improved results of pupils in these subjects.

Title of the Paper: Quantitative Risk Analysis Based on the Impact of Traffic Flow in a Road Tunnel


Authors: C. Caliendo, M. L. De Guglielmo

Pages: 39-45

Abstract: A quantitative risk analysis based on the impact of hourly traffic volume (VHP) and percentage of heavy goods vehicles (HGVs) in a bi-directional road tunnel was carried out both for normal and temporary traffic regimes. The results in term of social risk, as F/N curves, show that the risk level for combinations of VHP and percentage of HGVs can be beyond the threshold of intolerable risk. As a result, safety measures in order to reduce the risk level must be taken. In this respect, the Tunnel Management Agency (TMA) can permit, for normal traffic conditions, that HGVs pass through the tunnel only during night or along an alternative route runs completely in open air. Also in the event of a temporary lane closure for maintenance needs, the risk level can be beyond the safety limit. Risk charts are proposed for assisting the TMA in making decisions on traffic control strategies.

Title of the Paper: Approximate Solution of the Navier-Stokes Equation and Magnus Effect in the Fluid-Film Bearings


Authors: L. Savin, A. Kornaev, E. Kornaeva

Pages: 32-38

Abstract: The Magnus effect, which occurs with the oncoming flow around the rotating bodies, is known for a long time. The main purpose of the present paper was to identify the conditions of Magnus effect occurrence in a thin lubricant film of the fluid-film bearing and to obtain an approximate analytical dependency for its quantity evaluation. The mathematical model of the viscous incompressible fluid flow is based on the Navier-Stokes equation and the condition of incompressibility considering the non-stationarity of the process, inertia, viscous resistance and mass forces effect. As a result of evaluation of significance of the mathematical model equations terms by means of similarity theory and dimension analysis the conditions were determined as a dimensionless criteria, when inertia forces from the Magnus effect are significantly bigger than the mass and viscosity forces. Given the fulfillment of these conditions an analytical form was obtained to determine the hydrodynamic reaction of the lubricant.

Title of the Paper: Research on Implementation of GIS Systems with Automatic Acquisition and Multi-Criteria Analysis of Data


Authors: Sorin Borza, Carmen Simion

Pages: 23-31

Abstract: In this paper, an automatic system of taking over the data of the environment and their automatic transformation in GIS Data, for some intelligent map’s generation, is presented. Also, the system allows, by using the multi-criteria methods AHP and TOPSIS, an objective analysis of the factors that will be taken into account during the system. These factors will be taken over automatically by using the LabVIEW Software and with the help of the acquisition board that will be connected to the computer. By using the same LabVIEW software, the factors will be memorised in an ACESS type database. The database will be connected to the Geomedia Professional Software, with the help of which an intelligent map will be generated automatically. The system allows, not only the automatic collection of data, but also their memorization and the generation of GIS elements and an objective analysis of the collecting points of data could provide a concrete answer regarding the most and least polluted points. As a novelty element, the paper allows the analysis of the polluted factors using the multi-criteria AHP method in such automatic taking-over storage and data generation system. The most polluted and the less polluted place was determined taking into consideration the determining pollutant factors Also, in this paper is presented the possibility for combining AHP and TOPSIS multicriterial methods for evaluation of environmental quality through indicators that represent the environmental load.In conclusion, the paper offers new results regarding the use of the multi-criteria analysis for the interpretation of some factors of a different type to a common purpose, in this case air quality in a limited geographical area. For the first time, the use of software GIS for multi-criteria evaluation by means of AHP and TOPSIS methods was successful. In the first part of the paper, the general aspects of the paper will be presented. In the second part, the object oriented technics of the realization of the virtual apparatus and of the data transfer in the Access database. In the third part of the paper, the AHP method will be presented. In the fourth part of the paper, the TOPSIS method will be presented The fifth part will present the physical realization of the module system of automatic taking over data, the analysis of the polluting factors taking account the AHP and TOPSIS methods, the automatic generation of the object-oriented classes needed for the elaboration of the intelligent maps.

Title of the Paper: Optical Fish Classification Using Statistics of Parts


Authors: Mohcine Boudhane, Benayad Nsiri, Hamza Toulni

Pages: 18-22

Abstract: In this paper, We consider the problem of fish classification underwater. We described an algorithm based on robust fish decomposition and feature extraction. Our goal is to develop a system that detects and recognizes many kinds of fish in images and video sequences including various structures in underwater imagery. In order to get pertinent features, many classifiers is defined. These classifiers are responsible to extract parts of interest from the fish body. Each part forms a subclassifier and represents various local properties of the fish. A Bayesian artificial neural network (ANN) is used to classify each part. Probabilities are given by each ANN and was combined and recalculated in order to give a decision. Experimental results shows that the proposed approach give a good accuracy to make distinguish between different fish species.

Title of the Paper: Computational Information Conservation Theory (CICT): A Natural Framework for Arbitrary-Scale Physical and Biological System Simulation


Authors: Rodolfo A. Fiorini

Pages: 8-17

Abstract: Human approach to experience is based on making decision in a natural uncertain environment by incomplete knowledge. Even Stochastic vs. Combinatorically Optimized Noise generation ambiguity emphasizes the major double-bind problem in current most advanced instrumentation systems, just at the inner core of human knowledge extraction by experimentation in science. To grasp a more reliable representation of reality and to get more effective physical and biological simulation techniques, researchers and scientists need two intelligently articulated hands: both stochastic and combinatorial approaches synergistically articulated by natural coupling. The first attempt to identify basic principles to get stronger simulation solution for scientific application has been developing at Politecnico di Milano University since the end of last century. The fundamental principles on computational information conservation theory (CICT), for arbitrary-scale system modeling and simulation from basic generator and relation through discrete paths denser and denser to one another, towards a never ending "blending quantum continuum," are recalled. Four examples are presented and discussed. This paper is a relevant contribute towards arbitrary-scale physical and biological systems modeling and simulation, to show how CICT can offer stronger and more effective system modeling algorithms for more reliable simulation.

Title of the Paper: A Bayesian Network Based on MCDM Framework for Reverse Logistics


Authors: Fatima Lhafiane, Abdeltif ELbyed, Mohamed Bouchoum

Pages: 1-7

Abstract: Under the pressure from global competition, Companies are looking to reduce costs and business Process, and to increase their capacity for rapid development of new services and products. In order to ensure this, firms over the last decade focused increasingly on the integration of reverse logistics (RL) activities. The RL is considered as complex and dynamic network that involves many stakeholders including: suppliers, manufacturer, warehouse, retails and customers. This complexity is inherent in such process due to lack of perfect knowledge or conflicting data. Our research work emphasizes on decision making that is quite difficult process leading to the analysis of several variables or criteria which are characterized by uncertainty. In this paper we propose a decision framework based on Bayesian network (BN) and influence diagram (ID) inspired by multi-criteria decision making (MCDM) design, in order to structure and manage the decision making process with explicit modeling of uncertain interactions among the reverse logistics stages.