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Artificial neural network approach for rheological characteristics of coal-water slurry using microwave pre-treatment

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International Journal of Mining science and Technology 2017年第2期27卷 379-386页

作者： B.K.sahoo s.de B.C.Meikap department of Chemical Engineering Indian Institute of Technology Research and development Centre for Iron and steel Steel Authority of India Limited Chemical Engineering School of Engineering Howard College University of Kwazulu-Natal

detailed experimental investigations were carried out for microwave pre-treatment of high ash Indian coal at high power level(900 W) in microwave oven. The microwave exposure times were fixed at60 s and 120 s. A rheology characteristic for microwave pre-treatment of coal-water slurry(CWs) was performed in an online Bohlin viscometer. The non-Newtonian character of the slurry follows the rheological model of Ostwald de Waele. The values of n and k vary from 0.31 to 0.64 and 0.19 to 0.81 Pa·sn,respectively. This paper presents an artificial neural network(ANN) model to predict the effects of operational parameters on apparent viscosity of CWs. A 4-2-1 topology with Levenberg-Marquardt training algorithm(trainlm) was selected as the controlled ANN. Mean squared error(MsE) of 0.002 and coefficient of multiple determinations(R^2) of 0.99 were obtained for the outperforming model. The promising values of correlation coefficient further confirm the robustness and satisfactory performance of the proposed ANN model.

关键词： Microwave pre-treatment Coal-water slurry Apparent viscosity Artificial neural network Back propagation algorithm

Oligodendroglial heterogeneity in health,disease,and recovery:deeper insights into myelin dynamics

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Neural Regeneration Research 2025年第11期20卷 3179-3192页

作者： Pieter-Jan serneels Julie D.de schutter Lies.de Groef Lieve Moons steven Bergmans KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionNeural Circuit Development&Regeneration Research GroupLeuvenBelgium KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionCellular Communication&Neurodegeneration Research GroupLeuvenBelgium

decades of research asserted that the oligodendroglial lineage comprises two cell types:oligodendrocyte precursor cells and ***,recent studies employing single-cell RNA sequencing techniques have uncovered novel cell states,prompting a revision of the existing *** forward,the oligodendroglial lineage should be delineated into five distinct cell states:oligodendrocyte precursor cells,committed oligodendrocyte precursor cells,newly formed oligodendrocytes,myelin-forming oligodendrocytes,and mature *** new classification system enables a deeper understanding of the oligodendroglia in both physiological and pathological *** this uniform terminology will facilitate comparison and integration of data across ***,including the consolidation of findings from various.demyelinating models,is essential to better understand the pathogenesis of demyelinating ***,comparing injury models across species with varying regenerative capacities can provide insights that may lead to new therapeutic strategies to overcome remyelination ***,by standardizing terminology and synthesizing data from diverse studies across different animal models,we can enhance our understanding of myelin pathology in central nervous system disorders such as multiple sclerosis,Alzheimer's disease,and amyotrophic lateral sclerosis,all of which involve oligodendroglial and myelin dysfunction.

关键词： animal models demyelination fish mammals multiple sclerosis myelin neurodegeneration oligodendrocytes oligodendroglial lineage remyelination

REFERENCE FUNCTIONAL AND CHARACTERIsTIC sPACE FOR LAGRANGE AND BERNsTEIN OPERATORs

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Analysis in Theory and Applications 1995年第4期11卷 6-14页

作者： s.de Marchi M.Morandi Cecchi dept. of Pure and Applied Math. Via Belzoni 7-Padova ItalyDept. of Pure and Applied Math. Via Belzoni 7-Padova Italy

This paper deals with the description and the representation of polynomials.defined over n-simplices, The polynomials are computed by using two recurrent schemes: the Neville-Aitken one for the Lagrange interpolating operator and the de Casteljau one for the Bernstein-Bezier approximating operator. Both schemes fall intothe framework of transformations of the form where the F iare given numbers (forexample, at the initial step they coincide with the values of the function on a given lattice), and the coefficients (x) are linear polynomials valued in x and x is fixed. A general theory for such sequence of transformations can be found in [2] where it is also proved that these tranformations are completely characterized in term of a linear functional, reference functional. This functional is associated with a linear space., characteristic *** concepts of reference functionals and characteristic spaces will be used and we shall prove the existence of a characteristic space for the reference functional: associated with these operators.

关键词： REFERENCE FUNCTIONAL AND CHARACTERIsTIC sPACE FOR LAGRANGE AND BERNsTEIN OPERATORs

An innovative approach for integrated airline network and aircraft family optimization

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Chinese Journal of Aeronautics 2020年第2期33卷 634-663页

作者： JoséALEXANDRE T.G.FREGNANI Bento s.de MATTOs JoséA.HERNANdes department of Aeronautical Engineering Technological Institute of Aeronautics12228-900 Sao Jose dos CamposBrazil

The determination of optimal aerial transport networks and their associated flight frequencies is crucial for the strategic planning of airlines,as well as for carrying out market research,to establish target markets,and for aircraft and crew *** addition,optimum airplane types for the selected networks are crucial to improve revenue and to provide reduced operating *** present study proposes an innovative approach to determine the optimal aerial transport network simultaneously with the determination of the optimum fleet for that network,composed of three types of airplanes(network and vehicle integrated design).The network profit is *** passenger’s.demands between the airports are determined via a gravitational *** embedded linear programming solution is responsible for obtaining potential optimal network *** optimum fleet combination is.determined from a database of candidate aircraft designs via genetic algorithm.A truly realistic airplane representation is made possible thanks to accurate surrogate models for engine and aerodynamics is *** accurate engine deck encompassing a compression map and an innovative engine weight calculation bes.des an aerodynamical artificial neural network module enable a high degree of accuracy for the mission *** proposed methodology is applied to obtain the optimum network comprised of twenty main Brazilian airports and corresponding fleet.

关键词： Air transport Aircraft design Airline economics Airline network optimization Multidisciplinary design optimization

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The AK Transform

Applied Mathematics 2017年第2期8卷 145-153页

作者： altair s. de assis siegbert Kuhn Juan A. Limaco Comiss&atilde o Nacional de Energia Nuclear—DPD Rio de Janeiro RJ Brasil Universidade Federal Fluminense—GMA Niterói RJ Brasil Universitä t Innsbruck Institut für Theoretische Physik Innsbruck Austria

In this brief communication we present a new integral transform, so far unknown, which is applicable, for instance, to studying the kinetic theory of natural eigenmodes or transport excited in plasmas with bounded distribution functions such as in Q machines/plasma diodes or in the scrap-off layer of Tokamak fusion plasmas. The results are valid for functions of function spaces—Lebesgue spaces, which are defined using a natural generalization of the p-norm for finite-dimensional vector spaces, where is the real set, σs is the σ-algebra of Lebesgue measurable sets, and the μ Lebesgue measure. , so that . Note that, using a simpler notation, more natural/known to engineers, f could be cons.dered any piecewise continuous function, that is: Here is a Euclidian space with the usual norm (inner product: ) given by: [1].

关键词： Integral Transform Lebesgue Measures Kinetic Theory of Bounded Plasmas Natural Eigenmodes Transport Q-Machines Plasma Diodes Tokamak Nuclear Fusion

Enantioselective reductive conjugate alkenylation of α,β-enones with keto alkenyl acetates by nickel catalysis

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science China Chemistry 2025年第1期68卷 157-162页

作者： Rong-de He Yun-Lei Luo Qiu-Quan Pan Qi-Wei Yao Xing-Zhong shu state Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University

Reactions involving alkenyl acetates offer cost-effective and environmentally friendly routes for alkene synthesis, yet their asymmetric variant remains elusive. Concurrently, asymmetric conjugate alkenylation predominantly centered on nucleophilic addition using alkenyl–M. This manuscript presents an asymmetric reductive conjugate alkenylation reaction involving alkenyl acetates. The method facilitates the enantioselective addition of keto alkenyl groups to α,β-enones, resulting in the formation of unsaturated diketones—a class of useful structural motifs that are challenging to access otherwise. The use of electron-rich Pyroxy ligand is essential for achieving both high reaction efficiency and enantioselectivity.

关键词： nickel alkenylation asymmetric cross-coupling alkenes

Can the Glucose Central Control system Dysfunctions Induce Diabetes Mellitus?

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Open Journal of Endocrine and Metabolic Diseases 2023年第12期13卷 244-255页

作者： altair s. de assis João Luiz P. da Nobrega Cooperation Center for the development of Children and Adolescents—CCDIA Niterói RJ Brasil

We study afresh how the glucose control system anomalies impact the organicity of the glucose homeostasis and build up events of persistent hyperglycemia and diabetes mellitus. We have used critically the state of art literature related to the subject, in order to cross, to compare, and to organize the relevant contents to create a logical and consistent support to the finds. We show that it is consistent to assume that persistent hyperglycemia and diabetes mellitus can have precursors not only in pancreas, but also in brain, mainly induced by noxious dysfunctions of hypothalamus sensor neurons circuits and external noxious elements, causing pancreas overload, and the consequent exhaustion—overburden.

关键词： Brain Hypothalamus CNs—Central Nervous system sensor Neuron Circuits Glucose Central Control system External Noxious Elements Juvenile Persistent Hyperglycemia Diabetes Mellitus Homeostasis Euglycemia

Petrogenesis of Granites from the Ediacaran socorro Batholith,sE Brazil:Constraints from Zircon Dating,Geochemistry and sr-Nd-Hf Isotopes

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Journal of Earth science 2021年第6期32卷 1397-1414页

作者： Bárbara Bueno Toledo Valdecir de assis Janasi Instituto de Geociências USPCEP 05508-900S∼ao PauloSPBrazil

Whole rock elemental and sr-Nd isotope geochemistry and in situ zircon Hf isotope geochemistry were used to identify the sources of the Neoproterozoic granites from the socorro batholith,socorro-GuaxupéNappe(sGN),south Brasilia Orogen,*** trace elements and Hf isotope geochemistry provided information about sources and crystallization(T,f_(O2))*** main types of granites built the bulk of the batholiths,beginning with probably pre-collisional~640–630 Ma charnockites,and ending with~610 Ma voluminous post-collisional high-K calc-alkaline(HKCA)Ⅰ-type granites(Bragan?a Paulista-type).several types of leucogranites were generated from 625 to 610 Ma,spanning the interval from collisional to post-collisional *** charnockite bodies occur in the study area:the~640 Ma socorro charnockite has remarkable chemical similarities with Braganca Paulista-type granites,but higherε_(Nd)(t)=-6.1 and average zirconε_(Hf)(t)=-9.1 and lower^(86)sr/^(87)sr_(t)(0.7093)values,indicative of more juvenile and water-poor ***~633 Ma Atibaia charnockite has distinct geochemical signature(lower Mg^(#)and sr content;higher Zr),more negativeε_(Nd)(t)=-14.1,similar average zirconε_(Hf)(t)=-8.9,and much higher^(86)sr/^(87)sr_(t)=0.7197,probably reflecting a larger component from old *** predominant~610 Ma Bragan?a Paulista-type granites were emplaced in a post-collisional setting,and correspond to porphyritic biotite-hornblende monzogranites of high-K calc-alkaline character with 61 wt.%–67 wt.%siO_(2),high Mg^(#)(39–42),sr/Y(19–40),La/Yb(12–69),highly negativeε_(Nd)(t)(-12.3 to-12.9)and zirconε_(Hf)(t)(-12 to-17)and^(87)sr/^(86)sr_(t)=0.7119–*** features are interpreted as indicative of magma generation in a thickened crust,where melts from enriched mantle sources emplaced in the lowermost crust,heated host old continental crust rocks(gneisses and granulites)and partially mixed with their melting *** plutons(siO_(2)>72 wt.%)occur

关键词： U-Pb dating socorro-GuaxupéNappe high-K calc-alkaline granites

system integration analysis of a zeolite 13x thermal energy storage

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Energy and Built Environment 2024年第4期5卷 568-579页

作者： s.de Antonellis L.P.M.Colombo P.Castellazzi A.Rossetti L.Marocco Politecnico di Milano Department of Energyvia Lambruschini 4Milan 20156Italy Ricerca sul sistema Energetico-RsE s.p.A. Tecnologie di Generazione e Materialivia R.Rubattino 54Milan 20134Italy

Nowadays a major energy transition aimed at cutting CO 2 emissions has begun,with the ambitious goal of drasti-cally reducing the dependence on fossil fuels and promoting the use of renewable energy *** this context,energy storage systems play a key role in ensuring a stable,secure and time-aligned energy *** sorption thermal energy storages(TEss)can contribute to such transition,since they are simple and cheap devices able to provide a hot airflow with a high energy density and to store energy for long *** this work,open sorption TEs systems operated with Zeolite13X are investigated with a focus on the integration in practical ***,the experimental analysis and modelling of the sole TEs system is ***,the integration of the TEs at system level is carried *** analysis evidences that a significant reduction of storage capac-ity occurs if air humidification is necessary before the adsorption process or afterwards to keep adequate indoor comfort conditions for the *** the exemplary case study cons.dered,an energy density of 150 kWhm^(−3) can drop to 40 kWhm−3 in case of complete compensation of the adsorbed water through a *** paper provides useful guidelines for evaluating the performance of a TEs integrated system in terms of specific energy and *** also identifies applications involving high latent loads(e.g.,swimming pools,locker rooms)or for which low relative air humidity is required(*** of vehicles to prevent condensation on windows)as particularly beneficial for using a TEs system.

关键词： Energy storage Adsorption Zeolite system integration Numerical model