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Periodical
Zhurnal Belorusskogo gosudarstvennogo universiteta.
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ISSN: 2520257X 26173980 Year: 2017 Publisher: Minsk : BGU,

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Book
Gas Capture Processes
Authors: --- --- --- ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This book introduces the recent technologies introduced for gases capture including CO2, CO, SO2, H2S, NOx, and H2. Various processes and theories for gas capture and removal are presented. The book provides a useful source of information for engineers and specialists, as well as for undergraduate and postgraduate students in the fields of environmental and chemical science and engineering.

Keywords

History of engineering & technology --- in situ gasification chemical looping combustion --- high-flux circulating fluidized bed --- counter-flow moving bed --- gas leakage --- coupling mechanism --- carbon capture and utilization --- biogas upgrading --- calcium carbonate precipitation --- chemical absorption --- gas pressure --- gas content --- gas basic parameters --- rapid estimation technology --- supercritical water oxidation --- high-pressure separation --- oxygen recovery --- energy recovery --- economic analysis --- coal-direct chemical looping combustion --- theoretical methodology --- high-flux --- pressure gradient --- gas mole fraction --- activity --- UNIFAC --- phase equilibrium --- threshold value --- CO2 capture --- calcium looping --- chemical sorption --- anti-attrition --- pore-former particle size --- Reaction --- kinetics --- carbon dioxide --- N-methyldiethanolamine --- L-Arginine --- stopped flow technique --- carbon capture --- CO2 sequestration --- steel-making waste --- steel slag --- H2S absorption --- amine solutions --- glycols --- desulfurization --- aqueous and non-aqueous solutions --- gas diffusion --- unipore diffusion model --- bidisperse diffusion model --- dispersive diffusion model --- refinery plants --- industrial gas streams --- petrochemical processes --- waste gases --- activated carbons --- catalytic activation --- physicochemical structure --- SO2 adsorption --- optimal conceptual design --- market prediction --- economic uncertainty --- environmental impact --- carbon dioxide separation --- Aspen Plus --- CCGT --- Taguchi --- Minitab --- optimization --- 2-Amino-2-Methyl-1-Propanol --- modelling and Simulation --- post-combustion capture --- exergy analysis --- flowsheeting configurations --- nanofluids --- absorption intensification --- mass transfer coefficient --- bubble column --- global warming --- membrane contactor --- removal of NO2 and CO2 --- coke oven --- carbonaceous deposits --- spectral analysis --- mechanism --- arsenene --- doping --- first principles study --- gas adsorption --- two-dimensional --- waste polyurethane foam --- physical activation --- high selectivity --- ultra-micropore --- mechanical activation --- iron ore --- carbonation --- calcination --- recyclability --- mechanochemical reactions --- carbonation kinetics --- MXene --- gas separation --- Knudsen diffusion --- molecular sieving --- transport mechanism --- spiral nozzle --- gas absorption --- spray atomization --- droplet size --- droplet velocity --- gas emission --- capture --- CO2


Book
Computational Finance
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Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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With the availability of new and more comprehensive financial market data, making headlines of massive public interest due to recent periods of extreme volatility and crashes, the field of computational finance is evolving ever faster thanks to significant advances made theoretically, and to the massive increase in accessible computational resources. This volume includes a wide variety of theoretical and empirical contributions that address a range of issues and topics related to computational finance. It collects contributions on the use of new and innovative techniques for modeling financial asset returns and volatility, on the use of novel computational methods for pricing, hedging, the risk management of financial instruments, and on the use of new high-dimensional or high-frequency data in multivariate applications in today’s complex world. The papers develop new multivariate models for financial returns and novel techniques for pricing derivatives in such flexible models, examine how pricing and hedging techniques can be used to assess the challenges faced by insurance companies, pension plan participants, and market participants in general, by changing the regulatory requirements. Additionally, they consider the issues related to high-frequency trading and statistical arbitrage in particular, and explore the use of such data to asses risk and volatility in financial markets.


Book
Characterization of Bioactive Components in Edible Algae
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ISBN: 3039285610 3039285602 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Algae have been used since ancient times as food for humans, animal feed, agricultural fertilizer, and as a source of substances for therapeutic use. Currently, seaweed represents a vast source of raw materials used in the pharmaceutical, food, traditional medicine, and cosmetics industries. They are nutritionally valuable, both fresh and dried, or as ingredients in a wide variety of pre-made foods. In particular, seaweed contains significant amounts of protein, lipids, minerals, and vitamins. Information is limited on the role of algae and their metabolites in therapy. Only a few taxa have been studied for use in medicine. Many traditional cultures report the healing powers of selected algae in tropical and subtropical marine forms. This is especially true in the maritime areas of Asia, where the sea plays a significant role in daily activities. However, currently, only a few genera and species of algae are involved in aspects of medicine and therapy. The beneficial uses of seaweed or seaweed products include those that can mimic specific manifestations of human disease, production of antibiotic compounds, or improved human nutrition.


Book
Partial Differential Equations in Ecology : 80 Years and Counting
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Partial differential equations (PDEs) have been used in theoretical ecology research for more than eighty years. Nowadays, along with a variety of different mathematical techniques, they remain as an efficient, widely used modelling framework; as a matter of fact, the range of PDE applications has even become broader. This volume presents a collection of case studies where applications range from bacterial systems to population dynamics of human riots.

Keywords

Research & information: general --- Mathematics & science --- cross diffusion --- Turing patterns --- non-constant positive solution --- animal movement --- correlated random walk --- movement ecology --- population dynamics --- taxis --- telegrapher’s equation --- invasive species --- linear determinacy --- population growth --- mutation --- spreading speeds --- travelling waves --- optimal control --- partial differential equation --- invasive species in a river --- continuum models --- partial differential equations --- individual based models --- plant populations --- phenotypic plasticity --- vegetation pattern formation --- desertification --- homoclinic snaking --- front instabilities --- Evolutionary dynamics --- G-function --- Quorum Sensing --- Public Goods --- semi-linear parabolic system of equations --- generalist predator --- pattern formation --- Turing instability --- Turing-Hopf bifurcation --- bistability --- regime shift --- carrying capacity --- spatial heterogeneity --- Pearl-Verhulst logistic model --- reaction-diffusion model --- energy constraints --- total realized asymptotic population abundance --- chemostat model --- social dynamics --- wave of protests --- long transients --- ghost attractor --- prey–predator --- diffusion --- nonlocal interaction --- spatiotemporal pattern --- Allen–Cahn model --- Cahn–Hilliard model --- spatial patterns --- spatial fluctuation --- dynamic behaviors --- reaction-diffusion --- spatial ecology --- stage structure --- dispersal


Book
Symmetry Breaking in Cells and Tissues
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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“Symmetry Breaking in Cells and Tissues” presents a collection of seventeen reviews, opinions and original research papers contributed by theoreticians, physicists and mathematicians, as well as experimental biologists, united by a common interest in biological pattern formation and morphogenesis. The contributors discuss diverse manifestations of symmetry breaking in biology and showcase recent developments in experimental and theoretical approaches to biological morphogenesis and pattern formation on multiple scales.

Keywords

Research & information: general --- Biology, life sciences --- actin waves --- curved proteins --- dynamic instability --- podosomes --- diffusion --- cell polarity --- Cdc42 --- stress --- cellular memory --- phase separation --- prions --- apoptotic extrusion --- oncogenic extrusion --- contractility --- actomyosin --- bottom-up synthetic biology --- motor proteins --- pattern formation --- self-organization --- cell motility --- signal transduction --- actin dynamics --- intracellular waves --- polarization --- direction sensing --- symmetry-breaking --- biphasic responses --- reaction-diffusion --- membrane and cortical tension --- cell fusion --- cortexillin --- cytokinesis --- Dictyostelium --- myosin --- symmetry breaking --- cytoplasmic flow --- phase-space analysis --- nonlinear waves --- actin polymerization --- bifurcation theory --- mass conservation --- spatial localization --- activator–inhibitor models --- developmental transitions --- cell polarization --- mathematical model --- fission yeast --- reaction–diffusion model --- small GTPases --- Cdc42 oscillations --- pseudopod --- Ras activation --- cytoskeleton --- chemotaxis --- neutrophils --- natural variation --- modelling --- activator-substrate mechanism --- mass-conserved models --- intracellular polarization --- partial differential equations --- sensitivity analysis --- GTPase activating protein (GAP) --- fission yeast Schizosaccharomyces pombe --- CRY2-CIBN --- optogenetics --- clustering --- positive feedback --- network evolution --- Saccharomyces cerevisiae --- polarity --- modularity --- neutrality --- n/a


Book
New developments in Functional and Fractional Differential Equations and in Lie Symmetry
Authors: ---
Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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Delay, difference, functional, fractional, and partial differential equations have many applications in science and engineering. In this Special Issue, 29 experts co-authored 10 papers dealing with these subjects. A summary of the main points of these papers follows:Several oscillation conditions for a first-order linear differential equation with non-monotone delay are established in Oscillation Criteria for First Order Differential Equations with Non-Monotone Delays, whereas a sharp oscillation criterion using the notion of slowly varying functions is established in A Sharp Oscillation Criterion for a Linear Differential Equation with Variable Delay. The approximation of a linear autonomous differential equation with a small delay is considered in Approximation of a Linear Autonomous Differential Equation with Small Delay; the model of infection diseases by Marchuk is studied in Around the Model of Infection Disease: The Cauchy Matrix and Its Properties. Exact solutions to fractional-order Fokker–Planck equations are presented in New Exact Solutions and Conservation Laws to the Fractional-Order Fokker–Planck Equations, and a spectral collocation approach to solving a class of time-fractional stochastic heat equations driven by Brownian motion is constructed in A Collocation Approach for Solving Time-Fractional Stochastic Heat Equation Driven by an Additive Noise. A finite difference approximation method for a space fractional convection-diffusion model with variable coefficients is proposed in Finite Difference Approximation Method for a Space Fractional Convection–Diffusion Equation with Variable Coefficients; existence results for a nonlinear fractional difference equation with delay and impulses are established in On Nonlinear Fractional Difference Equation with Delay and Impulses. A complete Noether symmetry analysis of a generalized coupled Lane–Emden–Klein–Gordon–Fock system with central symmetry is provided in Oscillation Criteria for First Order Differential Equations with Non-Monotone Delays, and new soliton solutions of a fractional Jaulent soliton Miodek system via symmetry analysis are presented in New Soliton Solutions of Fractional Jaulent-Miodek System with Symmetry Analysis.


Book
Fractional Integrals and Derivatives: "True" versus "False"
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Year: 2021 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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This Special Issue is devoted to some serious problems that the Fractional Calculus (FC) is currently confronted with and aims at providing some answers to the questions like “What are the fractional integrals and derivatives?”, “What are their decisive mathematical properties?”, “What fractional operators make sense in applications and why?’’, etc. In particular, the “new fractional derivatives and integrals” and the models with these fractional order operators are critically addressed. The Special Issue contains both the surveys and the research contributions. A part of the articles deals with foundations of FC that are considered from the viewpoints of the pure and applied mathematics, and the system theory. Another part of the Special issue addresses the applications of the FC operators and the fractional differential equations. Several articles devoted to the numerical treatment of the FC operators and the fractional differential equations complete the Special Issue.


Book
Stochastic Processes with Applications
Authors: --- ---
ISBN: 3039217291 3039217283 Year: 2019 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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Stochastic processes have wide relevance in mathematics both for theoretical aspects and for their numerous real-world applications in various domains. They represent a very active research field which is attracting the growing interest of scientists from a range of disciplines.This Special Issue aims to present a collection of current contributions concerning various topics related to stochastic processes and their applications. In particular, the focus here is on applications of stochastic processes as models of dynamic phenomena in research areas certain to be of interest, such as economics, statistical physics, queuing theory, biology, theoretical neurobiology, and reliability theory. Various contributions dealing with theoretical issues on stochastic processes are also included.

Keywords

arithmetic progressions --- weighted quadratic variation --- fractional differential-difference equations --- small deviations --- periodic intensity functions --- realized volatility --- rate of convergence --- host-parasite interaction --- first Chebyshev function --- regularly varying functions --- Cohen and Grossberg neural networks --- mixture of Gaussian laws --- diffusion model --- transition densities --- re-service --- Strang–Marchuk splitting approach --- random delays --- nematode infection --- first-passage-time --- total variation distance --- forecast combinations --- products of primes --- discrete time stochastic model --- multiplicative noises --- slowly varying functions --- growth curves --- stochastic process --- loan interest rate regulation --- birth-death process --- non-Markovian queue --- catastrophes --- exogenous factors --- seasonal environment --- repairs --- proportional hazard rates --- structural breaks --- transient probabilities --- first passage time (FPT) --- bounds --- double-ended queues --- mixed Gaussian process --- stochastic order --- time between inspections --- busy period --- diffusion --- continuous-time Markov chains --- general bulk service --- time-non-homogeneous birth-death processes --- stand-by server --- reliability --- sensor networks --- random impulses --- scale family of distributions --- maximum likelihood estimation --- multi-state network --- totally positive of order 2 --- lognormal diffusion process --- fractional birth-death processes --- exact asymptotics --- stochastic orders --- time-non-homogeneous jump-diffusion processes --- asymptotic distribution --- inverse first-passage problem --- nonhomogeneous Poisson process --- two-dimensional signature --- multiple vacation --- first-passage time --- mean square stability --- fractional queues --- differential entropy --- random parameter matrices --- Wasserstein distance --- breakdown and repair --- fusion estimation


Book
Organic Conductors
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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This collection of articles focuses on different aspects of the study of organic conductors. Recent progress in both theoretical and experimental studies is covered in this Special Issue. Papers on a wide variety of studies are categorized into representative topics of chemistry and physics. Besides classical studies on the crystalline organic conductors, applied studies on semiconducting thin films and a number of new topics shared with inorganic materials are also discussed.

Keywords

Technology: general issues --- Chemical engineering --- organic π-radical --- molecular conductor --- phthalocyanine --- three-dimensional network --- three-dimensional electronic system --- organic conductors --- bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) --- bis(ethylenediseleno)tetrathiafulvalene (BEST) --- bis(ethylenedithio)tetraselenafulvalene (BETS) --- electrical resistivity --- magnetic susceptibility --- X-ray analysis --- charge-ordered state --- quantum chemical calculations --- Madelung energy --- magnetic property --- reversible transformation --- spin ladder --- nodal line semimetal --- single-component molecular conductor --- conductivity --- DOS --- tight-binding model --- interacting electrons in one dimension --- electronic and lattice instabilities --- renormalization group method --- X-ray diffraction --- single crystal --- electron density --- molecular orbital --- single-component molecular conductors --- extended-TTF dithiolate ligands --- gold dithiolate complexes --- (BETS)2Fe1−xGaxCl4 --- π-d interaction --- NMR --- charge glass --- heat capacity --- electric current --- electric voltage --- Boson peak --- chirality --- tetrathiafulvalene --- crystal structures --- band structure calculations --- hydrogen bonding --- charge-transfer salts --- (TMTTF)2X --- deuteration --- anions --- charge transport --- tunnel junction --- MOCVD --- quantum well --- co-doping --- solar cells --- (TMTSF)8(I3)5 --- (TMTSF)5(I3)2 --- (TMTSF)4(I3)4·THF --- organic conductor --- crystal structure --- high pressure --- DFT --- MP2 --- organic superconductors --- Beechgard salts --- Maxwell-Garnett approximation --- high-Tc --- pressure effect --- Dirac electron system --- resistivity --- magnetoresistance --- synchrotron X-ray diffraction --- band calculation --- correlated electron materials --- layered organic conductor --- unconventional superconductivity --- vortex dynamics --- d-wave pairing symmetry --- superconducting gap structure --- magnetic field --- flux-flow resistivity --- charge-ordered insulator --- electric double layer transistor --- organic field-effect transistor --- π–d system --- Mott insulator --- strongly correlated electron system --- multiferroic --- dielectric --- photoconductor --- organic semiconductors --- molecular orbitals --- pyroelectricity --- temperature modulation --- molecular ferroelectrics --- radiative temperature control --- thermal diffusion model --- lithium niobate --- first-principles calculation --- density-functional theory --- charge ordering --- hybrid functional --- electronic structure --- nickel–dithiolene complex --- cycloalkane substituent --- crystalline organic charge-transfer complexes --- disordered systems --- overlap integrals --- extended Hückel approximation --- Dirac electrons --- zero-gap semiconductors --- merging of Dirac cones --- n/a --- π-d system --- nickel-dithiolene complex --- extended Hückel approximation

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