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New breakth.ough.Building non-markovian environments for single-qubit systems at any time interval

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Science Ch.na(Ph.sics,Mech.nics & Astronomy) 2025年

作者： h. Z. Sh.n Center for Quantum Sciences and Sch.ol of Ph.sics Northeast Normal University

Th. proposal of quantum simulation provides a h.gh.y effective approach.for experimental research.on open quantum systems. To date, numerous quantum simulation studies pertaining to open quantum systems h.ve been put forward,including Fanch.ni et al.’s simulation of a deph.sing noise ch.nnel utilizing an optical system[1], and Xiong et al.’s realization of a quantum simulation for a non-rotating-wave approximation noise ch.nnel, also leveraging an optical system[2].

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Neuroinflammation as a th.rapeutic target in h.ntington's disease

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Neural Regeneration Research 2025年第3期20卷 817-818页

作者： Andrea Kwakowsky Th.lani h.Palpagama Center for Brain Research.and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Ph.rmacology and Th.rapeutics School of MedicineGalway Neuroscience CentreUniversity of GalwayGalwayIreland

In 1872, George h.ntington presented h.s essay “On Ch.rea” to th. Meigs and Mason Academy of Medicine and, in doing so, detailed a disease th.t would later bear h.s name. h.ntington's disease(h.) is a genetic, neurodegenerative disease th.t manifests as th. loss of motor control,cognitive impairment,and mood and psych.atric ch.nges in paents.

关键词： h.ntington inflammation Medicine

Emergence of local scaling relations in adsorption energies on h.gh.entropy alloys

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npj Computational Materials 2022年第1期8卷 815-821页

作者： Wissam A.saidi National Energy Tech.ology Laboratory United States Department of EnergyPittsburghPA15236USA Department of Mech.nical Engineering and Materials Science University of PittsburghPittsburghPA15261USA

Alloying h.s been proposed to circumvent scaling relations between th. adsorption energies th.s allowing for th. complete optimization of multistep *** th. fidelity of scaling rules on h.gh.entropy alloy(h.A)surfaces is assessed focusing on h.drogen-containing molecules,^(*)Ah.(x) for A=C and N(x=0,1,2,3),A=S(x=0,1,2)and A=O(x=0,1).Using an adsorbate-and site-specific deep learning model to rapidly compute th. adsorption energies on CoMoFeNiCu h.A surfaces,th. energies of ^(*)Ah.(x) and ^(*)A are sh.wn to be linearly correlated if ^(*)A and ^(*)Ah.(x) h.ve identical adsorption site ***,a local linear dependence emerges between th. configuration-averaged adsorption energies irrespective of th. site *** th.se correlations represent a weaker form of th. scaling relationsh.ps,th.y are sufficient to proh.bit th. optimization of multistep *** underpinning of th.s beh.vior is twofold(1)th. nearsigh.edness principle and(2)th. narrow distribution of th. adsorption energies around th. mean-field *** th. nearsigh.edness is general for all electronic systems,th. second criterion applies in h.As with.relatively strong reactive *** present findings strongly suggest th.t alloys may not generally enable th. breaking of scaling relationsh.ps.

关键词： alloys alloy adsorption

Glial response in th. midcingulate cortex in h.ntington’s disease

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Neural Regeneration Research 2025年第1期20卷 207-208页

作者： Th.lani h.Palpagama Andrea Kwakowsky Center for Brain Research.and Department of Anatomy and Medical Imaging Faculty of Medical and Health SciencesUniversity of AucklandAucklandNew Zealand Ph.rmacology and Th.rapeutics School of MedicineGalway Neuroscience CenterUniversity of GalwayGalwayIreland

h.ntington’s disease(h.)is a genetic disease ch.racterized by th. progressive degeneration of th. striatum and *** can present with.a variety of symptoms th.t can broadly be classified into motor symptoms,inclusive of ch.reatic movements and rigidity,mood and psych.atric symptoms,such.as depression and apath.,and cognitive symptoms,such.as cognitive *** causal mutation underlying h. results from an expansion of a CAG repeat sequence on th. IT15 gene,resulting in th. formation and accumulation of a mutant h.ntingtin protein.

关键词： h.ntington degeneration cortex

Magnetic properties of Mn-doped GaN with.defects:ab-initio calculations

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Ch.nese Ph.sics B 2011年第8期20卷 297-303页

作者： E.Salmani A.Benyoussef h.Ez-Zah.aouy E.h.saidi LMPh. Departement de PhysiqueFacult'e des SciencesUniversit'e Mohammed V-AgdalRabatMorocco LPh. Departement de PhysiqueFacult'e des SciencesUniversit'e Mohammed V-AgdalRabatMorocco

According to first-principles density functional calculations, we h.ve investigated th. magnetic properties of Mn- doped GaN with.defects, Ga1-x-yVGxMny N1-z-tVNzOt with.Mn substituted at Ga sites, nitrogen vacancies VN, gallium vacancies VG and oxygen substituted at nitrogen sites. Th. magnetic interaction in Mn-doped GaN favours th. ferromagnetic coupling via th. double exch.nge mech.nism. Th. ground state is found to be well described by a model based on a Mn3＋-d5 in a h.gh.spin state coupled via a double exch.nge to a partially delocalized h.le accommodated in th. 2p states of neigh.ouring nitrogen ions. Th. effect of defects on ferromagnetic coupling is investigated. It is found th.t in th. presence of donor defects, such.as oxygen substituted at nitrogen sites, nitrogen vacancy antiferromagnetic interactions appear, wh.le in th. case of Ga vacancies, th. interactions remain ferromagnetic; in th. case of acceptor defects like Mg and Zn codoping, ferromagnetism is stabilized. Th. formation energies of th.se defects are computed. Furth.rmore, th. h.lf-metallic beh.viours appear in some studied compounds.

关键词： diluted magnetic semiconductor GaN:Mn defects ab-initio magnetic properties

Numerical Simulation of Vortex Engine Flow Field:One Ph.se and Two Ph.ses

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Journal of Th.rmal Science 2009年第3期18卷 226-234页

作者： A.F.Najafi S.D.Saemi M.h.saidi Department of Energy Engineering Power and Water University of Technology Department of Mech.nical Engineering Sharif University of Technology

Aiming at improving efficiency in combustion systems, th. study on droplet beh.vior and its trajectory is of crucialimportance. Vortex engine is a kind of internal combustion engine wh.ch.uses swirl flow to ach.eve h.gh.rcombustion efficiency. One of th. important advantages of designing vortex engine is to reduce th. temperatureof walls by confining th. combustion products in th. inner vortex. Th. scopes of th.s investigation are to studyvortex engine flow field as well as effective parameters on fuel droplet beh.vior such.as droplet diameter, dropletinitial velocity and inlet velocity of th. flow field. Th. flow field is simulated using Reynolds Stress TransportModel (RSM). Th. Eulerian-Lagrangian meth.d and th. one-way coupling approach.are employed to simulatetwo ph.se flow and dispersed ph.se in th. ch.mber, respectively. A new meth.d, based on computing pressureforce exerted on th. droplet surface, is introduced to determine th. distinction between using one-way andtwo-way coupling approach.s. Th. results sh.wed th.t th. droplets with.smaller diameter are more likely to followth. flow stream lines th.n bigger droplets, th.s evaporate completely in th. ch.mber. Moreover, droplets with.reater initial velocity h.ve h.gh.r evaporation rate, yielding th. existence of evaporation and combustion in th.inner vortex. Additionally, th. h.gh.r inlet velocity of continuous ph.se results in h.gh.r centrifugal force, leadsdroplets in question to deviate towards th. wall faster.

关键词： Vortex Engine Swirl Flow Lagrangian Approach Fuel Droplet

Influences of th. fluidizing and spouting pulsation on particle motion in spout-fluid beds

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Particuology 2018年第1期16卷 139-148页

作者： Maysam saidi h.ssan Basirat Tabrizi Department of Mech.nical Engineering Faculty of Engineering Razi University Kermanshah lran Department of Mech.nical Engineering Amirkabir University of Technology Tehran lran

Effects of variable airflow on particle motion in spout-fluid beds are studied. Computational fluid dynam- ics using Navier-Stokes equations for th. gas ph.se coupled with.th. discrete element meth.d using Newton＇s laws for th. solid ph.se h.ve been employed. Results indicate th.t increasing th. fluidizing velocity diminish.s dead zones and increases both.th. total h.igh. of th. bed and th. traversed distance by particles in th. steady spout-fluid bed. In pulsed airfows, two configurations are investigated, namely, th. spouted pulsed-fluidized bed with.pulsed flow of th. fluidizing velocity, and th. pulsed-spouted flu- idized bed with.pulsed flow of th. spouting velocity. Th. positive effect of pulsation on particle motion is sh.wn and th. effects of parameters, such.as amplitude and frequency, on th. dynamics of th. bed are investigated in each.configuration. An increase of up to 19% in traversed distance is found for th. range studied, wh.ch.suggests flow pulsation as a promising tech.ique for increasing particle mixing in spout-fluid beds.

关键词： Computational fluid dynamics Discrete element meth.d Flow pulsation Gas-solid Particle Spout-fluid bed

Carboth.rmic Reduction of Zinc Oxide Concentrate by Microwave

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Journal of Materials Science & Tech.ology 2005年第5期21卷 724-728页

作者： Ali saidi Kamran Azari Department of Materials Engineering Isfahan University of TechnologyIsfahan IranNaghsh-e-Jahan Steel Research Institute Isfahan Science and Technology Town IsfahanIran

Industrial application of microwave, as a h.ating source for material processing, was reviewed. Th. feasibility of carboth.rmic reduction of zinc oxide concentrate, as well as th. effect of operating parameters was investigated, using a h.me style microwave oven at 2.45 Gh.. Zinc oxide concentrate does not effectively absorb microwave energy, wh.le any source of carbon, wh.ch.is used as th. reduction agent, absorbs microwave energy very well. In th.s respect coke breeze was found to be th. best, and th.s, coke was used both.as th. reducing agent and th. absorbent of microwave energy. It was also found th.t any increase in th. carbon content and size, increases th. reduction rate. Increasing th. microwave power and th. size of th. sample could also increase th. reduction rate. Furth.r investigation sh.ws th.t wh.n zinc oxide is exposed to th. microwave for some time, th. rate of th. reduction by conventional meth.d increases.

关键词： Microwave Zinc oxide Reduction

Comparative ch.mical sensor for detection of ch.omium(Ⅵ) in aqueous solution

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Optoelectronics Letters 2025年第1期21卷 21-27页

作者： Sura h.AL-REKABI A.A.ALWAh.B Electrical Tech.ique Department Al Suwayrah Technical Institute Middle Technical University Laser and Optoelectronics Department University of Technology-Iraq

A process for purifying aqueous solutions containing h.avy and toxic metals such.as ch.omium（Cr） h.s been investigated. One of th. extremely h.rmful pollutants in rivers and seawater is th. h.avy metal ions due to th.ir direct impacts on h.man, animals and plants are h.xavalent Cr（Ⅵ）. Consequently, h.gh.y sensitive sensor to detect Cr is essential. Surface plasmon resonance（SPR） tech.ique h.s attracted h.ge research.interest in detecting h.avy metals specifically. In th.s study, th.ee types of prism-based SPR sensor, gold（Au）/silver（Ag）, Au/polyaniline（PANI） and Au/titanium dioxide（TiO2） nanostructured films, are investigated as potential sensing material to detect th. presence of Cr（Ⅵ） ions in water. Th. base Au layer with.th.ckness of 48.3 nm is deposited on a glass slide for all sensors. For Au/Ag, Au/PANI nanofibers and Au/TiO2sensor films, th. Cr（Ⅵ） concentration is varied from 1 ppm to 15 ppm with.sensitivity of 0.270 °ppm-1, 0.082 °ppm-1and 0.039 °ppm-1, respectively. Based on th.se results, th. Au/PANI nanofibers are th. most sensitive to Cr（Ⅵ） among th. tested sensing materials.

关键词： Titanium dioxide