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1

Złoża węgla kamiennego w Polsce jako potencjalne źródło pierwiastków krytycznych

Jurek J.

Górnictwo Odkrywkowe

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2014

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R. 55, nr 2-3

74--79

PL

Oceniono stan przeprowadzonych badań pierwiastków krytycznych w węglu kamiennym. Zwrócono uwagę na konieczność poszerzenia zakresu badań dla uzyskania odpowiedzi na pytanie czy polskie złoża węgla kamiennego można traktowa jako potencjalne źródło niektórych pierwiastków krytycznych. Zbadano wstępnie korelację pomiędzy zawartością pierwiastków krytycznych oraz innych składników popiołów węgli kamiennych. Stwierdzono istnienie statystycznie istotnych zależności relacyjnych między niektórymi pierwiastkami krytycznymi i minerałami ilastymi (glinokrzemianami), siarczkami żelaza ora związkami fosforu. Należy to jednak zweryfikować dla liczniejszych, reprezentatywnych zbiorów danych.

EN

The state of the study of critical elements in coal conducted so far have been assessed. The necessity to enlarge the scope c the study in order to obtain the answer to the question, whether or not the Polish coal deposits can be regarded as a potential source of selected critical elements have been noted. The correlation between critical raw materials and other components of coal ashes have been initially examined. Statistically significant correlations between certain critical raw materials and clay minerals (aluminosilicates), iron sulfides and phosphate compounds have been found. They should be, however, verified for larger, representative data sets.

2

Przegląd zastosowań geostatystyki do szacowania parametrów polskich złóż węgla brunatnego

Jurek J., Mucha J., Wasilewska-Błaszczyk M.

Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN

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2013

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nr 85

143--153

PL

Analiza opracowań publikowanych i wybranych prac niepublikowanych wykazała, że do geostatystycznego modelowania przestrzennego rozkładu parametrów polskich złóż węgla brunatnego najczęściej wykorzystywano metodę krigingu zwyczajnego, a rzadko symulację geostatystyczną. Skrótowo opisano wyniki dotychczasowych badań geostatystycznych, wskazując m.in. na trudności oceny wiarygodności modeli geostatystycznych związane z brakiem informacji o jakości danych podstawowych w dokumentacjach geologicznych, odmienność struktur zmienności parametrów pokładów węgla w różnych złożach, małą przydatność modeli geostatystycznych opartych na danych z rozpoznania wiertniczego złóż do prognozowania i sterowania jakością urobku, relatywnie małą dokładność szacowania wartości parametrów w punktach i małych blokach. Ponadto, zwrócono uwagę na możliwości wykorzystania w badaniach innych narzędzi geostatystycznych i zaproponowano poszerzenie zestawu parametrów jakościowych węgla brunatnego, które powinny być przedmiotem analiz geostatystycznych.

EN

Analysis of the published and selected unpublished papers showed that for model spatial variability of lignite deposit parameters the ordinary kriging method was used most of all and — rarely — geostatistical conditional simulation method. Results of previous geostatistical researches were briefly described in the paper. It was stated as follows: limited credibility of geostatistical models due to the lack of information on the quality of basic data in geological reporting, the diversity of variability structures of deposit parameters in different fields, low utility of geostatistical models based on data from reconnaissance drilling to predict and control the quality of output, the relatively low accuracy of parameter values estimations at points and within small blocks. Furthermore, the possibilities of using other geostatistical tools were mentioned. Widening set of quality parameters of lignite, which should be the subject of geostatistical analysis, was proposed.

3

Business process- and graph grammar-based approach to ERP system modelling

Flasiński M., Jurek J.

Journal of Applied Computer Science

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2012

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Vol. 20, nr 1

7-21

EN

Methods of ERP (Enterprise Resource Planning) systems modelling are presented in the paper. The modelling is necessary to adapt an ERP system to a company in such a way, that it fully supports a management at the operational level, i.e. it supports the business processes in the best possible way. The choice of methods (business process and graph grammarbased) described in the paper is based on the authors' experiences in several dozen of implementation projects, realized in large Polish enterprises. The methods can be used to select the best ERP system for a company, to design its implementation, and to customize the system accordingly to the requirements of a company.

4

On the use of syntactic pattern recognition methods for strategic management

Jurek J.

Systems Science

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2009

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Vol. 35, no 3

55-61

EN

A model of the application of syntactic pattern recognition methods in a computer system supporting strategic management in an enterprise (based on Balanced Scorecard) is presented in the paper. The goal of BCSPRS system (Balanced ScoreCard Pattern Recognition System) is the analysis and recognition of patterns representing changes of values of strategic measures in time-series. The model of BCSPRS is based on the syntactic pattern recognition approach with the use of GDPLL(k) grammars (quasi contextsensitive string grammars). The model is efficient computationally and it can be used for the recognition of even very complex patterns. Additionally, the model provides a self-learning feature: the knowledge base about the patterns to be recognized can be automatically extended by the proper grammatical inference algorithms.

5

The design and implementation of the system supporting the control of industrial-like processes

Jurek J.

Foundations of Control and Management Sciences

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2008

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No. 9

51-66

EN

The software design and the implementation of an intelligent system supporting the control of industrial-like processes is discussed in the paper. The main tasks of such a system are on-line monitoring, analysis and recognition of process patterns (the results of the recognition are to be used to control the process), and self-learning activity, which enable the system automatic gathering new information about the process in order to recognise new process patterns. The system is based on the syntactic pattern recognition paradigm with the use of quasi-context sensitive string grammars. The design model of the system has been prepared accordingly to the object-oriented approach. In the paper we present the overview of the model and its implementation, and we discuss its advantages.

6

On the Analysis of Fuzzy String Patterns with the Help of Extended and Stochastic GDPLL(k) Grammars

Flasiński M., Jurek J.

Fundamenta Informaticae

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2006

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Vol. 71, nr 1

1-14

EN

Two methods of the analysis of distorted (fuzzy) string patterns are presented. The methods are based on the use of GDPLL(k ) grammars generating a large subclass of context sensitive languages. The first one utilizes error-correcting approach: a minimum distance measure is used for error-correcting parsing. The second one utilizes stochastic approach: the decision about the production to be applied in a derivation step is given according to the probability measure.

7

The Object-oriented Architecture of the Syntactic Pattern-recognition System Based on GDPLL(k) Grammars

Jurek J.

Schedae Informaticae

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2004

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Vol. 13

83-102

EN

The syntactic pattern recognition model based on GDPLL (k) grammars has been proposed [6, 13] as an efficient tool for inference support in diagnostic and control expert systems. In this paper we discuss the software engineering aspect of the syntactic pattern recognition (sub)system. The architecture of the system should allow to embed the system in real-time environments, accumulate knowledge about the environment, and flexible react to the changes in the environment. The object-oriented approach has been applied to design the system, and the Unified Modeling Language has been used for the specification of the software model. In the paper we presented the model and its practical applications.

8

On the construction of transition functions for DPLL(k) automata for syntactic pattern recognition

Jurek J.

Machine Graphics and Vision

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2003

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Vol. 12, No. 4

489-513

EN

DPLL(k) automata have been introduced as a tool for inference support in pattern recognition-based real-time expert systems. The automata can be characterised by the two following features: they can recognise languages of a big descriptive power (quasi context sensitive languages), and they are efficient (i.e. they are of linear computational complexity). The two features make the automata useful in case of many practical applications, such as the on-line analysis of complex trend functions describing behaviour of industrial equipment. In this paper we present a method for construction of transition functions for the automata and a formal proof of its correctness.

9

Automatic generation for control table for DPLL(k) parser

Jurek J.

Journal of Applied Computer Science

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2003

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Vol. 11, nr 2

31-39

EN

DPLL(k) parser was proposed (Flasiński, Jurek, 1999) as an efficient tool for recognising complex trend junctions (patterns) which describe a behaviour of an industrial equipment. Although it was shown how to automatically generate a control table for a DPLL(1) parser, the problem of a construction of the table in a general case (k ≥ 21) was left for future research. In this paper we present the results of the research: a method of generation of a control table for any DPLL(k) parser.

10

Struktura przestrzenno-funkcjonalna Szczecina w opinii jego mieszkańców

Jurek J.

Zeszyty Naukowe. Marine Sciences / Uniwersytet Szczeciński

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1998

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Nr 4

91-114

EN

The essence of the spatial functional analysis is to examine the functions, which particular infrastructure elements play in a city taken as a whole. The functional and spatial concepts determine properties of the settlement system in the material and technical bearing as well as in the functional aspect. On the other hand, the social and the sociospatial concepts define the settlement system as a specific method to from social structure and processes in the space of the residence places and the places of supplying other needs within the framework of the city's material and technical system. Integration of the functional and the social expression results in a notional model of the local settlement system. The city of Szczecin identifies itself as the local settlement system, and its structure is described on the basis of social perception of the city's centre and suburbs. The perceptive approach is typical for the methodology used in behavioural geography. In the poll studies, the inhabitants of Szczecin pointed out these areas on the city's map that were recognized by them as the central ones considering their commercial and service functions, administrative and economic functions and cultural functions, as well as the areas being admitted by them as the suburbs. The factual material collected was used to characterize different aspects of the centrality and the suburbanite problems basing on the developed and calculated indices of : concentration, dispersion (scattering), generality, synonymity and distinctness (expressivness). Distribution and substantial interpretation of the values of these indices gave a pricture of Szczecin where the occurrence of the central and the suburban areas of the city are indicated. Evaluation of respoders' opinions produced a basis to draw conclusions on the perception of transformations of the city's land development. The basic discriminants of transformations are: changes in the intensity of the centrality and suburbanite syndrome, spatial expansion of the central areas within the framework of reintegration, transformations in the correlation scale of the centre and the suburbs as an expresion of trends to overconcentration and deconcentration, occurrence of separation and disintegration phenomena of the central areas together with creation of the subcentral systems.