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Derivations and reflection positivity on the quantum cylinder

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Science China Mathematics 2020年第10期63卷 2037-2054页

作者： slawomir Klimek Matt McBride Department of Mathematical Sciences Indiana University-Purdue University IndianapolisIndianapolisIN 46202USA Department of Mathematics and Statistics Mississippi State UniversityMississippi StateMS 39762USA

We describe the general structure of unbounded derivations in the quantum *** prove a noncommutative analog of reflection positivity for Laplace-type operators in a noncommutative cylinder following the ideas of the proof by Jaffe and Ritter(2008)of reflection positivity for Laplace operators on manifolds equipped with a reflection.

关键词： derivations reflection positivity noncommutative cylinder

Creating Local Reinforcement of a Channel in a Composite Casting Using Electromagnetic Separation

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Journal of Materials Science & Technology 2015年第9期31卷 918-922页

作者： slawomir Golak Maciej Dyzia Faculty of Materials Engineering and Metallurgy Silesian University of Technology

This article presents a new method to obtain local reinforcement in near-surface layers of channels in castings made of a particle-reinforced metal matrix composite in the alternating electromagnetic field generated by an inductor placed inside the channel. In centrifugal casting, the centrifugal force on the particles leads to the formation of composite structures, while in the proposed method, the electromag- netic force field on the particles results in the designed structure of the composite casting. The article reports the experimental verification of this method using an aluminium sleeve reinforced locally with SiC particles at the inner wall.

关键词： Metal matrix compositesFunctionally graded materialsElectromagnetic separation

Photoluminescence and electrochemiluminescence studies of chosen rare earths systems

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Journal of Rare Earths 2008年第2期26卷 192-197页

作者： Stefan Lis slawomir But Krzysztof Staninski Monika Jesiolowska Department of Rare Earths Faculty of Chemistry Adam Mickiewicz University Grunwaldzka 6

Eu（Ⅲ） complexes with chosen Keggin polyoxomatalates, POM, containing organic counter cations （tetrabutylarnmonium, tetrabutylphosphonium, triphenylethylphosphonium）, were synthesized, and their photophysical properties were studied. The synthesized complexes had the general formula of XnH5-n[EuSiW11O39], formulated based on the results of elemental and thermogravimetric analysis and FTIR spectroscopy. The photophysical properties of the obtained compounds were investigated using photoluminescence and electrochemiluminescence, ECL, methods in solutions and solids. The most intense luminescence of Eu（Ⅲ） was observed for the complexes with tetrabutylarnmonium cations. After the addition of phenanthroline to the XnH5-n[EuSiW11O39] solutions, a large increase in the Eu（Ⅲ） luminescence intensity and a lengthening of its luminescence lifetime were observed as a result of the formation of ternary complexes. Attempts to apply ECL as a method of light emission by generating species capable of forming excited states in Ln/POMs, i.e., Tb（Ⅲ） and Eu（Ⅲ） in the Na9EuW10O36 and Na9TbW10O36 complexes, were made. The influence of the POM complexes on the ECL was also tested using the Tb/EDDHA （EDDA=ethylenediamine di（o-hydroxyphenylacetic acid）） complex, which is effective in generating ECL.

关键词： Ln(Ⅲ) luminescence electrochemiluminescence polyoxometalates complexes rare earths

Distribution network reconfiguration using feasibility-preserving evolutionary optimization

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Journal of Modern Power Systems and Clean Energy 2019年第3期7卷 589-598页

作者： Alberto LANDEROS slawomir KOZIEL Mohamed FABDEL-FATTAH School of Science and Engineering Reykjavik University101 ReykjavikIceland Faculty of Electronics Telecommunications and InformaticsGdansk University of Technology80-233Gdan′skPoland

Distribution network reconfiguration(DNR) can significantly reduce power losses, improve the voltage profile, and increase the power quality. DNR studies require implementation of power flow analysis and complex optimization procedures capable of handling large combinatorial problems. The size of distribution network influences the type of the optimization method to be applied. Straightforward approaches can be computationally expensive or even prohibitive whereas heuristic or meta-heuristic approaches can yield acceptable results with less computation cost. In this paper, a customized evolutionary algorithm has been introduced and applied to power distribution network reconfiguration. The recombination operators of the algorithm are designed to preserve feasibility of solutions(radial structure of the network) thus considerably reducing the size of the search space. Consequently, improved repeatability of results as well as lower overall computational complexity of the optimization process have been achieved. The optimization process considers power losses and the system voltage profile, both aggregated into a scalar cost function. Power flow analysis is performed with the Open Distribution System Simulator,a simple and efficient simulation tool for electric distribution systems. Our approach is demonstrated using several networks of various sizes. Comprehensive benchmarking indicates superiority of the proposed technique over state-of-the-art methods from the literature.

关键词： Distribution network reconfiguration(DNR) Feasibility-preserving evolutionary optimization Power loss reduction Radial networks Voltage profile

Derivations and spectral triples on quantum domains Ⅱ: Quantum annulus

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Science China Mathematics 2019年第12期62卷 2463-2486页

作者： slawomir Klimek Matt McBride Sumedha Rathnayake Department of Mathematical Sciences Indiana University-Purdue University IndianapolisIndianapolisIN 46202USA Department of Mathematics and Statistics Mississippi State UniversityStarkvilleMS 39762USA Department of Mathematics University of MichiganAnn ArborMI 48109USA

Continuing our study of spectral triples on quantum domains,we look at unbounded invariant and covariant derivations in the quantum *** particular,we investigate whether such derivations can be implemented by operator... 详细信息

关键词： noncommutative annulus unbounded derivations spectral triples

Permanence of Economic Potential of Cities Based on Sector Development

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Chinese Geographical Science 2017年第1期27卷 123-136页

作者： Piotr RAZNIAK slawomir DOROCKI Anna WINIARCZYK-RAZNIAK Pedagogical University of Cracow ul. Podchorqzych 2 Cracow 30-084 Poland

The paper attempts to answer the following key question: how will a city′s world rank change in the face of crisis in its main economic sector? Crisis is defined here as a decline in financial performance in the given sector, which leads to the decline of its constituent firms and corporations on the world economic scene. The World Economic Center Index(WECI) has been created in order to rank cities based on the value of their resident corporations by sector and show their level of stability upon the removal of the most important sector. This provides information on the potential of each analyzed city as well as on its advanced features or area of specialization. Research has shown that nearly half the World Economic Centers are dominated by the financial and materials sectors of the economy. Different sectors dominate different regions of the world. For example, consumer staples and materials were dominant in North America, while information technology and financials were dominant in Europe. In Asia, several sectors tend to dominate the economy. Research has shown that the ability of a principal economic sector to resist economic crisis largely depends on the strength of the command and control function of a city. Finally, a high globalization level of a city is a key determinant of its susceptibility to economic crisis.

关键词： globalization economic crisis world city world economic center headquarters

A note on quantum odometers

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Science China Mathematics 2023年第7期66卷 1555-1568页

作者： slawomir Klimek Matt McBride J.Wilson Peoples Department of Mathematical Sciences Indiana University-Purdue University IndianapolisIndianapolisIN46202USA Department of Mathematics and Statistics Mississippi State UniversityMississippi StateMS 39762USA Department of Mathematics The Pennsylvania State UniversityUniversity ParkPA 16802USA

We discuss various aspects of noncommutative geometry of smooth subalgebras of Bunce-Deddens-Toeplitz algebras.

关键词： noncommutative geometry derivation smooth subalgebra K-theory

Gasification of lignite from Polish coal mine to hydrogen-rich gas

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International Journal of Coal Science & Technology 2022年第6期9卷 151-160页

作者： Adam Smolinski slawomir Wochna Natalia Howaniec Central Mining Institute Plac Gwarkow 140-166 KatowicePoland PGE Górnictwo i Energetyka Konwencjonalna S.A. Oddz.Kopalnia Wegla Brunatnego TurówGórników Turowa 159-916 BogatyniaPoland Department of Energy Saving and Air Protection Central Mining InstitutePlac Gwarkow 140-166 KatowicePoland

The efforts of the world research activities involved in clean coal technologies development focus to a considerable extent on integrated hydrogen and power generation technologies based on coal *** an alternative to combustion pro-cesses,gasification offers increased efficiency,lower negative environmental impact as well as wider application range of the main product—synthesis gas—in power generation and chemical *** order to select the most optimal lignite for the purpose of gasification,it is necessary to determine coal reactivity,the key parameter characterizing how fast the fuel reacts with the gasifying medium and controlling its process ability in thermochemical conversion to energy and/or energy *** paper presents the experimental results of oxygen/steam gasification of lignite coal char in a fixed bed reactor under atmospheric pressure and at the temperature of 700,800 and 900℃;the samples come from an open pit lignite mine in the southwest of *** effectiveness of the gasification process was tested in terms of the total gas and hydrogen yields,gas composition,carbon conversion rate and chars reactivity.

关键词： Coal gasification Hydrogen Syngas Clean coal technologies

Loss of FHIT expression in gastric mucosa of patients with family histories of gastric cancer and Helicobacter pylori infection

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World Journal of Gastroenterology 2005年第1期11卷 17-21页

作者： Krystyna Stec-Michalska slawomir Antoszczyk Grazyna Klupinska Barbara Nawrot Clinic of Gastroenterology and Internal Diseases Centre of Molecular and Macromolecular Studies of the Polish Academy of Sciences

AIM: To answer the question whether FHIT gene expression is affected by the family history of gastric carcinoma and the presence of Helicobacter pylori (Hpylori) in the gastric mucosa of patients with ***: FHIT gene expression in two different topographic sites of the gastric mucosa of twenty-one patients with dyspepsia and with or without familial gastric carcinoma, infected or not infected with H pylori, was evaluated by reverse transcription-PCR (RT-PCR) and IMAGE QUANT methods. A rapid urease test and histopathological examination were used to determine H pylori ***: In the gastric mucosa of patients with family histories of gastric carcinoma, the amount of FHIT protein mRNA was reduced down to 32%, and for patients with H pylori colonization, to 24% in comparison to controls with dyspepsia and without cancer in the family. FHIT expression was independent of the topography of specimens (corpus vsantrum), and for the control patients it was less sensitive to infection with H pylori. A considerable statistical difference in FHIT levels was observed in the gastric mucosa from the corpus of patients with family histories of gastric carcinoma in respect to H pylori colonization (P = 0.06). Macroscopic evaluation of the gastric mucosa demonstrated that pathologic changes classified according to the Sydney system had no significant influence on FHIT expression within each tested group of ***: Loss of FHIT expression was observed in patients with dyspepsia and family histories of gastric carcinoma, especially those infected with H pylori. Such results may constitute an early indication of the development of gastric carcinoma, which is associated with family factors including heredity and H pylori infection. The loss of the FHIT gene may serve as a marker for early diagnosis and prevention of gastric carcinoma, especially in context of early monitoring of H pylori infection in individuals with a record of familial stomach ca

关键词： Gastric cancer Helicobacter pylori infection FHIT protein