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Challenges of Modern Technology
EN The solvent impregnated resins enables effective recovery of microquantities of chromium(VI) ions from wastewaters. The solvent impregnated resin (SIR) Amberlite XAD 7 HP as polymer matrix has been prepared by the wet-impregnation technique. Aliquat 336 was employed as the extractant and acetone as [...]
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Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
EN The reduction of NO by propene, in the presence of oxygen, over Ag/Al2O3 was studied. The catalyst was prepared by anodic oxidation of aluminum foil in sulfuric acid solution. The alumina films contain parallel cylindrical pores of uniform diameter. Silver was electrodeposited on the bottom of the p[...]
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Pomiary Automatyka Kontrola
2010 R. 56, nr 3 287-291
PL W części drugiej artykułu przedstawiono zagadnienia związane z budową zagregowanych hierarchicznych modeli dynamicznych obiektów sterowania o wielkiej złożoności, na przykładzie modelu parownika kotła energetycznego. W szczególności przedstawiono problemy konstrukcji modelu oraz redukcji zlinearyzow[...]
EN Problems connected with building of aggregated hierarchical models of complex plants, are presented in the paper. The paper describes problems of linear model building and reduction of a steam boiler BP-1150. The hierarchical structure of a once-through steam boiler was defined, as well as mathemati[...]
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Materials Science Poland
2010 Vol. 28, No. 2 413--420
EN WC/Cu composite powders were synthesized by co-precipitation and subsequent reduction-carburization process. The precipitates contained W-Cu compounds fabricated using a chemical procedure from a mixture of copper nitrate and ammonium paratungstate in distilled water. In order to synthesize the WCCu[...]
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Fundamenta Informaticae
EN We investigate different variants of unambiguity in the context of computingmulti-valued functions. We propose a modification to the standard computation models of Turing machines and configuration graphs, which allows for unambiguity-preserving composition. We define a notion of reductions (based o[...]
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Pomiary Automatyka Kontrola
PL Zagadnienia prezentowane w artykule są związane z budową zagregowanych hierarchicznych modeli dynamicznych obiektów sterowania o wielkiej złożoności na przykładzie modelu parownika kotła energetycznego. W szczególności przedstawiono problemy redukcji zlinearyzowanego modelu rur ekranowych parownika [...]
EN The problems connected with reduction of hierarchical models of complex control objects were presented in the article. The paper describes influence of parameters weight function on approximation errors and possibilities of parameters optimization.
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Fundamenta Informaticae
EN During the past decade methods of multiple classifier systems have been developed as a practical and effective solution for a variety of challenging applications. A wide number of techniques and methodologies for combining classifiers have been proposed in the past years in literature. In our work w[...]
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Polish Journal of Chemistry
EN The anomeric hydroxyl group of perbenzylated and peracetylated carbohydrates can be stereoselectively replaced by a bromine or iodine atom using palladium dichloride, triethylsilane and carbon tetrabromide and/or iodine at room temperature. To illustrate the synthetic potential of this novel method,[...]
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Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje
EN The study has been undertaken to establish the effect of steam on the activity of copper oxides or manganese oxides supported on MgF2 in the reaction of NO + C3H6 + O2. The results were compared with those obtained for similar catalysts supported on commonly used g-Al2O3. For the systems with copper[...]
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Polish Journal of Chemistry
EN V2O5/_-Al2O3 catalysts for the dehydrogenation of isobutane to isobutene were prepared by impregnation and characterized by BET,H2-TPR, ESR and XPS. Based on our studies of the effects of the extent of catalyst reduction on catalytic performance, we conclude that the V2O5/_-Al2O3 catalytic activity [...]
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Fundamenta Informaticae
EN This paper deals with selective substitution grammars. It concentrates on multisequential grammars with homogeneous selectors that have all their activated parts identical. The present paper reduces the number and size of selectors in these grammars. Indeed, it demonstrates that for every phrase-str[...]
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Bulletin of the Polish Academy of Sciences. Technical Sciences
EN A new extended Roesser type model is introduced. It is shown that: 1. Any singular 2D general model (1) with [formula] can be reduced to the model (6) or (6'), 2. Regular singular 2D model (9) can be reduced to standard extended Roesser type model (11) if its pencil is regular. Sufficient conditions[...]
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Foundations of Computing and Decision Sciences
EN In this paper, we generalise Pawlak's rough approach for simplifying a decision table in an information system. We consider an information system where attribute values are not always quantitative, rather subjective having vague or imprecise meanings. Some objects may have attribute values which are[...]
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Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej. Konferencje
EN The reduction of chromium (IV) in industrial pellets and ore lumps was investigated by the thermogravimetric analysis (TGA). The main goal of the study was to examine in different temperature zones the behaviour of a sample consisting of industrial pellets mixed with lumpy ore and coke. The experime[...]
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Mechanics and Mechanical Engineering
2000 Vol. 4, nr 2 191--196
EN In the newest publications of many scientific papers the great interest in vibrations reduction and control can be seen. The authors show the huge significance of elaborating simple and effective methods of oscillations reduction [1-5]. The most important aplications of these vibration absorbers are[...]
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Archives of Metallurgy and Materials
2017 Vol. 62, iss. 2B 1011--1014
EN As a part of the study on recycling Li(NCM)O2 lithium-ion battery scraps, solvent extraction experiments were performed using different extraction agents such as PC88A, Cyanex272 and D2EHPA to separate Co, Ni and Mn from the leaching solution. When the ratio of Mn to Ni was about 0.4 in t[...]
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Operations Research and Decisions
EN A method for the allocation of technologies of reduction of CO2 emission to sources of emissions based on dynamic programming has been described. The purpose of the application of the method was to develop an efficient strategy of allocating financial means for reducing CO2 emissions from a set of c[...]
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Schedae Informaticae
2017 Vol. 26 61--68
EN For a positive integer n, n-expandable deep pushdown automata always contain no more than n occurrences of non-input symbols in their pushdowns during any computation. As its main result, the present paper demonstrates that these automata are as powerful as the same automata with only two non-input [...]
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Journal of Ecological Engineering
EN This work covers the pollution of the atmosphere during the work of the Mikhailovsky Mining and Refining Facility which is located within 100 km from the city of Kursk, in the city of Zheleznogorsk. Over the past few years in the whole world, the anthropogenic activity, connected mainly with the loc[...]
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Metrology and Measurement Systems
2019 Vol. 26, nr 2 253--266
EN New measurement technologies, e.g. Light Detection And Ranging (LiDAR), generate very large datasets. In many cases, it is reasonable to reduce the number of measuring points, but in such a way that the datasets after reduction satisfy specific optimization criteria. For this purpose the Optimum Dat[...]
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