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Fault Detection in Nonlinear Systems Via Linear Methods

-0014. Filaretov V., Vukobratovic M., and Zhirabok A. (2003). Parity relation approach to fault diagnosis in manipulation robots, Mechatronics 13(2): 141-152. Filaretov, V. and Zhirabok, A. (2006). Logic-dynamic approach to fault diagnosis in mechatronic systems, International Journal of Advanced Robotic Systems 3(4): 285-294. Frank, P. (1990). Fault diagnosis in dynamic systems using analytical and knowledge-based redundancy-A survey and some new results, Automatica 26(3): 459-474. Gertler, J. (1993). Residual generation in model

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A model of the analysis of the dynamics and structure of socio-economic development (an example of the set of the largest Polish cities in the years 1998–2015)

Abstract

The complexity of the reality studied by geographical research requires applying such methods which allow describing the state of affairs and ongoing changes in the best possible way. This study aims to present a model of research on selected aspects of the dynamics and structure of socio-economic development. The idea was to determine whether we deal with the process of reducing or widening the differences in terms of individual features. The article primarily pursues a methodological goal, and to a lesser extent an empirical one. The methodological objective of the paper was to propose and verify a multi-aspect approach to the study of development processes. The analyses carried out reveal that in terms of the features taken into account in the set of 24 of the largest Polish cities the dominating processes are those increasing differences between cities, which are unfavourable in the context of the adopted development policies aiming at reducing the existing disparities. In relation to the methodological objective, the results of the conducted research confirm the rationale of the application of the measures of dynamics and the feature variance to determine the character (dynamics and structure) of the socio-economic development process of cities. Comparatively less effective, especially for interpretation, is the application of principal component analysis and a multivariate classification, which is mainly the result of differences in the variance of particular features.

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A Dynamic Approach to the Typology of Functional Derelict Areas (Sosnowiec, Poland)

Abstract

The increasing number of wastelands in East-central European countries is primarily a consequence of functional transformations and movements in the structure of employment. Taking into account such a challenge in this article, the authors propose an approach in which the basic category is a typological proposal with reference to areas with derelict functions, which in turn refers to research within the scope of human geography. In their methodological proposal, the authors consider such variables as: (i) the diversification of management and use of space; (ii) time; (iii) economic functions; and (iv) the scope of geographic research. The effect of including these variables is an attempt to dynamically depict the evolution of land use, with particular attention paid to wasteland: original state - transitional state (derelict areas) - present state. The typological depiction of the emergence and transformation of areas with derelict functions is presented for the case of Sosnowiec.

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Spectral Dynamics in L1 and L2 Vowel Perception

Benjamins. Hillenbrand, J. 2013. Static and dynamic approaches to vowel perception. In G. Morrison and P. Assmann (eds.), Vowel inherent spectral change, 9-30. Berlin: Springer. Jenkins, J. J. and W. Strange. 1999. Perception of dynamic information for vowels in syllable onsets and offsets. Perception and Psychophysics 61, 1200-1210. Jenkins, J.J., Strange, W. and T. R. Edman. 1983. Identification of vowels in ‘vowelless’ syllables. Perception and Psychophysics 34, 441-450. Jin, S. H. and C. Liu. 2013. The

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The Analysis of Institutional Environment in the Area of Product Market Competition in the New EU Member States: What Do the Data Say About the Models of Capitalism Emerging in the CEE Countries?

smaller number of variables, with the use of the so-called hexagons of similarity, in a static way. The dynamic approach adopted in this study allows us to examine the path dependence in order to find out to what extent the current institutional environment of product market competition results from past development trends of the countries under study. The analysis by North [1990 , p. 115] of the path dependence of England and Spain involves the situation prevailing several hundred years ago. In this study, we will not go back so far. Since the study covers a group

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Evolution of Regional Disparities in Poland

Evolution of Regional Disparities in Poland

The article presents the state of and changes in the pattern of regional disparities in Poland over the years 1995-2007. The differences in the level of economic development of regions are examined in a dynamic approach on the basis of per capita income, indices of local government finances, and investment outlays. The effect of development-activating factors on regional income is considered. An answer is sought to the question of whether the growth dynamics had a favourable effect on the evolution of regional disparities in Poland.

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Experimental Determination of Natural Frequencies of Prestressed Suspension Bridge Model

Abstract

A suspension bridge is the most suitable type for a long-span bridge. Increased kinematic displacements are the major disadvantages of suspension bridges. This problem can be solved by application of prestressed cable truss.

Dynamic approach is one of regulated bridge design parts. Determination of natural frequencies of a physical model of a prestressed suspension bridge is presented in this paper.

Natural frequencies, as mode shapes, of the model depending on a prestressing level were determined. It was shown that a mode shape with one half wave did not appear.

Experiments showed that dynamic characteristics of prestressed suspension bridge could be regulated by changing a prestressing level, which excludeda possibility of resonance appearance.

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Some examples comparing static and dynamic network approaches in water resources allocation models for the rivers of high instability of flows /

Abstract

In this paper the authors compare two mathematical approaches to the problem of determination of optimal water resources allocation. We compare standard static approach based on static network flow model in pure or generalized network with the dynamic approach based on MDGNFM model presented in [WOJAS 2008]. This comparison is done in the framework of three worked examples of water system. We discuss the following aspects: a possibility to guarantee in the model the availability of the water which is allocated to user in analysed time period; the influence of a choice of the length of time step on the final result, a possibility to consider different summary times in water allocation paths. Comparative analysis can recommend the dynamic approach as more appropriate in the case of water systems of high instability of water flows.

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Statistical Models in Enterprises Default Risk Assessment – an Example of Application

Abstract

Default risk assessment is crucial in the banking activity. Different models were developed in the literature using the discriminant analysis, logistic regression and data mining techniques. In this paper the logistic regression was applied to verify models proposed by R. Jagiełło for different sectors. As an alternative, the logistic regression model with the nominal variable SECTOR was applied on the pooled sample of enterprises. The dynamic approach using the Cox regression survival model was estimated. Including the nominal variable SECTOR only slightly increases the predictive power of the model (in the case of “defaults”). The predictive power of the Cox regression model is lower, the only advantage is the higher accuracy classification in the case of “defaulted” enterprises.

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Dynamic Heeling Moment Due to Liquid Sloshing in a Rectangular Tank of Different Dimensions and Elevation in Ship’S Hull / Dynamiczny Moment Przechylający Od Swobodnych Powierzchni Cieczy W Prostokątnym Zbiorniku Okrętowym O Różnych Wymiarach I Lokalizacji Pionowej

Abstract

Liquid sloshing phenomenon taking place in partly filled ships’ tanks directly affects the stability of a vessel and her safety on seaway, however, only static calculations are carried out onboard ships nowadays. The presented investigation is focused on dynamic approach towards liquid motion onboard ships. The set of numerical simulations of liquid sloshing taking place in moving tanks is carried out in terms of tank’s dimensions and its elevation within ship’s hull. A number of characteristics of the heeling moment due to liquid sloshing is obtained and analyzed.

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