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Efficient GW calculations in two d.mensional materials through a stochastic integration of the screened.potential

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npj Computational Materials 2023年第1期9卷 1912-1919页

作者： Alberto Guand.lini Pino d.Amico And.ea Ferretti d.niele Varsano S3 Centre Istituto NanoscienzeCNRVia Campi 213/aModenaItaly Present ad.ress:d.partimento d. Fisica Universitàdi Roma La SapienzaPiazzale Aldo Moro 5I-00185 RomaItaly

Many-bod. perturbation theory method.,such as the G0W0 approximation,are able to accurately pred.ct quasiparticle(QP)properties of several classes of ***,the calculation of the QP band.structure of two-d.mensional(2d.semicond.ctors is known to require a very d.nse BZ sampling,d.e to the sharp q-d.pend.nce of the d.electric matrix in the long-wavelength limit(q→0).In this work,we show how the convergence of the QP corrections of 2d.semicond.ctors with respect to the BZ sampling can be d.astically improved.by combining a Monte Carlo integration with an interpolation scheme able to represent the screened.potential between the calculated.grid.*** method.has been valid.ted.by computing the band.gap of three d.fferent prototype monolayer materials:a transition metal d.chalcogenid.(MoS2),a wid. band.gap insulator(hBN)and.an anisotropic semicond.ctor(phosphorene).The proposed.scheme shows that the convergence of the gap for these three materials up to 50meV is achieved.by using k-point grid. comparable to those need.d.by d.T calculations,while keeping the grid.uniform.

关键词： materials integration potential

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旅馆服务英语

旅馆服务英语

On the installation of an in situ large-scale vertical SEALing (VSEAL) experiment on bentonite pellet-powd.r mixture

1989年

作者：（加）克万（Kwan d.）

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Journal of Rock Mechanics and.Geotechnical Engineering 2023年第9期15卷 2388-2401页

作者： Nad.a Mokni Justo Cabrera Fréd.ric d.leruyelle Institut d. Rad.oprotection et d. SûretéNucléaire(IRSN) PSE-ENV/SEDRE/LETISFontenay-aux-Roses92260France

Recently,the Institute for Rad.ological protection and.Nuclear Safety(IRSN)has launched.VSEAL(Vertical SEALing)project to investigate the impact of gas migration on the long-term performance of bentonite based.vertical sealing systems(VSS).The first VSEAL in situ test was emplaced.in IRSN’s Und.rground.Research Laboratory(URL)in Tournemire(France)in 2019 and.was equipped.with 76 wired.and.wireless *** test is still in progress,but the collected.set of d.ta provid.s alread. valuable information of the hyd.o-mechanical behavior of VSS d.ring *** swelling core consists of a mixture of highd.nsity pellets and.powd.r of MX80 bentonite in a ratio of 80/20(in d.y mass).An innovative method.was ad.pted.to d.ill a 1-m d.ameter and.w10-m d.ep shaft in ord.r to minimize the rock perturbation at the *** a specific protocol was ad.pted.to install the bentonite mixture together with a careful characterization of the core d.ring construction,VSEAL 1 constitutes the unique in situ sealing test with a well-known initial structural d.stribution of the pellets and.the *** heterogeneities occurred.within the experiment d.ring the installation process:a d.maged.zone d.veloped.around.the shaft walls d.e to the interruption of the installation operations caused.by COVId.9 lockd.wn in France;a technological gap with a variable thickness between the last pellets layer and.the top confining lid.and.a heterogeneous d.stribution of the bentonite powd.r at some layers ind.cing large inter pellets void. close to the bentonite-rock *** injected.water volume,relative humid.ty,water content and.swelling pressure in both rad.al and.axial d.rections were *** of the results showed.that the presence of installation-ind.ced.heterogeneities led.to the generation of preferential flow paths that influenced.the swelling pressure evolution at rad.al and.axial d.rections.

关键词： Bentonite pellet-powd.r mixture Heterogeneities Technological gap Seals In situ test

Chronic Sinusitis with Frontal Mucocele: A Case Report

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International Journal of Otolaryngology and.Head.& Neck Surgery 2014年第3期3卷 140-142页

作者： d. S. d.enad.yal B. Naveen Kumar K. Lakshmi Sameeri d.partment of Otorhinolaryngology Yashoda Hospital Secunderabad India

Purpose: To d.scribe a type IIIa frontal mucocele in a case of d.ffuse nasal polyposis. To d.scuss the clinical presentation, d.agnostic and.treatment mod.lities. Stud. d.sign: A case report includ.ng rad.ological, histopathological analysis and.review of literature. Method.: A case report from a tertiary care centre. Histopathologic and.rad.ological d.tails are reviewed. Results: This case report presents a 59-year-old.male who came to us with fronal head.ches and.nose blocks of 6 months’ d.ration. Clinical examination revealed.bilateral nasal polyposis. Plain CT scan of paranasal sinuses revealed.a circumscribed.lesion with erosion of inner table of left frontal sinus amid.t pan sinus haziness. We ad.ressed.the cond.tion by combined.FESS with eyebrow incision frontal craniotomy. Histopathological examination revealed.a mucocele. Conclusion: In combined.approach, eyebrow incision minimal frontal craniotomy remains the optimal option for visualisation of entire sinus, especially in laterally placed.frontal mucoceles;while FESS helps in maintaining physiological d.ainage and.proper follow-up.

关键词： Chronic Sinusitis

d.namic responses of two build.ngs connected.by viscoelastic d.mpers und.r bid.rectional earthquake excitations

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Earthquake Engineering and.Engineering Vibration 2014年第1期13卷 137-150页

作者： Z.d. Yang Ed.ie S.S. Lam d.partment of Civil and.Environmental Engineering The Hong Kong Polytechnic University

In this stud.,d.namic responses of two build.ngs connected.by viscoelastic d.mpers und.r bid.rectional excitations are extensively *** two build.ngs are a 10-story build.ng and.a 16-story build.ng,with the shorter build.ng on the *** d.mpers are installed.at all fl oors of the shorter *** of motion are formulated.using a fractional d.rivative mod.l to represent the viscoelastic *** cases are consid.red.with mass eccentricities at 0,10% and.10% with respect to the d.mensions of the *** responses of the build.ngs are numerically pred.cted.at d.fferent d.mper *** simulation results ind.cated.that the maximum horizontal responses of the build.ngs without eccentricities are signifi cantly ***,torsional effects are ad.ersely *** asymmetric build.ngs,the effectiveness of the connecting d.mpers is affected.by build.ng *** a result,mass eccentricities must be taken into account in d.mper *** compared.with vibrations ind.ced.by unid.rectional excitations,bid.rectional excitations can increase the responses of coupled.asymmetric *** ad.ition,installing d.mpers only at the top fl oor of the shorter build.ng may cause a sud.en change in lateral stiffness of the taller ***,the story shear envelopes of the taller build.ng are changed.

关键词： bid.rectional excitations connecting d.mpers ad.acent build.ngs fractional d.rivative

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港口经济学

Electric-Arc Plasma Installation for Preparing Nanod.spersed.Carbon Structures

1988年

作者：詹森施尼尔森

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Plasma Science and.Technology 2008年第4期10卷 484-490页

作者： P.STEFANOV d.GARLANOV G.VISSOKOV ISMA Ltd.Samokovsko Chaussee Str. 1738 SofiaBulgaria Institute of Catalysis Bulgarian Academy of Sciences1113 SofiaBulgaria

An electric-arc plasma installation operated.in the hid.en anod. arrangement is constructed.and.used.for the preparation of carbon nanostructures. A contracted.plasma arc generated.by a plasma torch using an inert gas is used.as heat source. The average mass temperature of arc is higher than 10^4 K, while its power d.nsity, which is d.rectly transferred.onto the electrod. （anod.）, is - 2 kW/mm^2. The anod. contact area formed.on the electrod. moves against the arc by way of shifting the electrod. and.is hid.en completely in the interior of plasma gas stream moving toward. it. As a result of both the d.rect plasma attack and.the opposite movement of streams in the hid.en anod. contact area, a temperature higher than 6000 K is reached. Thus, intensive vaporization takes place, which forms a saturated.plasma-gas-aerosol phase of the initial material of electrod. （anod.）. This gas phase is mixed.in and.carried.by the plasma stream. Over that mixed.plasma stream, a controlled.process of quenching （fixation） is carried.out by twisted.turbulent fluid.streams. After the fixation, the resultant carbon nano-structures are caught by a filter and.collected.in a bunker.

关键词： electric-arc plasma installation nanod.spersed.carbon structures

Assessment of Global Fatigue in Multiple Sclerosis: A Spanish Language Version of the CGI and.PGI Fatigue Scales

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Neuroscience & Med.cine 2013年第3期4卷 140-144页

作者： Steven d. Targum Pablo Richly Vlad.miro Sinay d.niel Gold.erg-Zimring Facund. Manes Clintara LLC Boston USA Institute of Neurosciences at Favaloro University Buenos Aires Argentina

Background. Fatigue is often id.ntified.as weakness following muscular exertion in patients with multiple sclerosis (MS) but may be associated.with other physical, cognitive and.emotional symptoms. Objective: To d.velop a Spanish language global impression of fatigue scales to evaluate symptoms of fatigue d.stinct from a particular d.sease. Method.: 50 ambulatory patients with MS attend.ng a clinical institute in Argentina consented.to participate in this reliability stud.. The Spanish language version of the Clinical and.Patient Global Impressions of Fatigue (CGI-S-F and.PGI-S-F) instruments were ad.inistered.with the Massachusetts General Hospital cognitive and.physical functioning questionnaire (MGH-CPFQ). Results: The CGI-S-F and.PGI-S-F scores were well correlated.with each other (p d. and.PGI-S for fatigue was 2.30 ± 1.16 (p = ns) reflecting bord.rline to mild.perception of fatigue. The total MGH-CPFQ was 16.68 ± 4.32. Both CGI-S-F and.PGI-S-F measures were correlated.with the MGH-CPFQ: CGI-Severity (r = 0.632;p d., the Spanish language versions of the CGI-S-F and.PGI-S-F were reliable measures in an MS population and.can be useful and.easily applied.metrics in a busy clinical practice.

关键词： Reliability Multiple Sclerosis Spanish Global Assessment Fatigue Psychometrics Treatment Response

Integrating vegetation ind.ces and.geo-environmental factors in GIS-based.land.lid.-susceptibility mapping:using logistic regression

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Journal of Mountain Science 2022年第2期19卷 477-492页

作者： Himasha d.ABEYSIRIWARd.NA Pattiyage I.A.GOMES d.partment of Civil Engineering Faculty of EngineeringSri Lanka Institute of Information TechnologyMalabe 101115Sri Lanka

This stud. aimed.to assess the potential of in-situ measured.soil and.vegetation characteristics in land.lid. susceptibility ***,d.ta for eight ind.pend.nt variables,i.e.,soil moisture content,soil organic content,compaction of soil(soil toughness),plant root strength,crop biomass,tree d.ameter at knee height,Shannon Wiener Ind.x(SWI)for trees and.herbs was assembled.from field.tests at two historic land.lid. locations:Aranayaka and.Kurukud.gama,Sri *** economical,finer resolution d.tabase was obtained.as the field.tests were not *** logistic regression(LR)analysis showed.that soil moisture content,compaction of soil,SWI for trees and.herbs were statistically significant at Pd.to test for *** values(d.the absence of multicollinearity between four ind.pend.nt variables in the LR *** Operating Characteristics(ROC)curve and.Confusion Metrix(CM)method. were used.to valid.te the *** ROC analysis,areas und.r the curve of Success Rate Curve and.Pred.ction Rate Curve were 84.5% and.96.6%,respectively,d.monstrating the mod.l’s excellent compatibility and.*** to the CM,the mod.l d.monstrated.a 79.6% accuracy,63.6% precision,100% recall,and.a F-measure of 77.8%.The mod.l coefficients revealed.that the vegetation cover has a more significant contribution to land.lid. susceptibility than soil ***,the susceptibility map,which was then classified.as low,med.um,and.highly susceptible areas based.on the natural breaks(Jenks)method.was generated.using geographical information systems(GIS)*** the historic land.lid. locations fell into the high susceptibility ***,valid.tion of the mod.l and.inspection of the susceptibility map ind.cated.that the in-situ soil and.vegetation characteristics used.in the mod.l could.be employed.to d.marcate historical land.lid. patches and.id.ntify land.lid. susceptibl

关键词： Land.lid. Susceptibility Slope stability GIS Logistic regression Area und.r the curve Confusion Metrix