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Restra.nt effect o. pa.titio. wa.l o. the tunnel flo.r hea.e in la.ered ro.k ma.s

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Jo.rna. o. Mo.nta.n Science 2024年第7期21卷 2462-2479页

作者： Ya.G Yunyun HUa.G Da.ZHo.G Zhu LIU Ya.g PENG Jia.bing Scho.l o. Civil a.d Tra.spo.ta.io. Engineering Hebei University of TechnologyTianjin 300401China Co.lege o. Geo.o.y Engineering a.d Geo.a.ics Chang’an UniversityXi’an 710054China Co.lege o. Civil Engineering&a.chitecture China Three Gorges UniversityYichang 443002China.

The presence o. ho.izo.ta. la.ered ro.ks in tunnel engineering significa.tly impa.ts the sta.ility a.d strength o. the surro.nding ro.k ma.s,lea.ing to.flo.r hea.e in the *** study fo.used o. prepa.ing la.ered specimens o. ro.k-like ma.eria. with va.ying thickness to.investiga.e the fa.lure beha.io.s o. tunnel *** results indica.e tha. thin-la.ered ro.k ma.s exhibits wea. interla.er bo.ding,ca.sing ro.k la.ers nea. the surfa.e to.buckle a.d brea. upwa.ds when subjected to.ho.izo.ta. *** a. increa.e in the la.er thickness,a.tra.sitio. in fa.lure mo.e o.curs fro. upwa.d buckling to.shea. fa.lure a.o.g the pla.e,lea.ing to.a.no.icea.le reductio. in flo.r hea.e *** prima.y ca.se o. significa.t defo.ma.io. in flo.r hea.e is upwa.d buckling *** a.dress this issue,the study pro.o.es the insta.la.io. o. a.pa.titio. wa.l in the middle o. the flo.r to.mitiga.e hea.e defo.ma.io. o. the ro.k *** results demo.stra.e tha. the pa.titio. wa.l ha. a.co.sidera.le sta.ilizing effect o. the flo.r,reducing the zo.e o. buckling fa.lure a.d minimizing flo.r hea.e *** is crucia. fo. the pa.titio. wa.l to.be sufficiently high to.prevent buckling fa.lure a.d ensure *** simula.io. ca.cula.io.s o. a. engineering exa.ple,it is co.firmed tha. implementing a.pa.titio. wa.l ca. effectively reduce flo.r hea.e a.d enha.ce the sta.ility o. tunnel flo.r.

关键词： La.ered ro.k Flo.r hea.e Ho.izo.ta. co.pressio. test Fa.lure beha.io. Pa.titio. wa.l

Rheo.o.ica. a.d sta.ility a.a.ysis o. cement pa.tes inco.po.a.ing silica.ba.ed wa.tes

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Pa.ticuo.o.y 2024年第6期89卷 144-152页

作者： Julia.da.Ro.a.Ma.tins Ja.a.de Ca.a.ca.te Ro.ha.Da.ha.ir Ho.za.Lucia.o.Senff Gra.ua.e Pro.ra. in Ma.eria.s Science a.d Engineering(PPGMa.) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Gra.ua.e Pro.ra. in Civil Engineering(PPGEC) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Gra.ua.e Pro.ra. in Chemica. Engineering(Po.ENQ) Federal University of Santa Catarina(UFSC)Florianópolis88040-900SCBrazil Depa.tment o. Mo.ility Engineering Federal University of Santa Catarina(UFSC)Joinville89219-600SCBrazil

This study investiga.es the influence o. wa.te cha.a.teristics,especia.ly zeta.po.entia.,o. the pro.erties o. cement pa.tes a.d *** fo.us is to.eva.ua.e the impa.t o. the zeta.po.entia. o. cement pa.ticles a.d wa.te ma.eria.s o. the sedimenta.io. speed,rheo.o.y,a.d ha.dening time o. sta.ilized cement *** Cement II F 40,reta.der a.ditive,silica.a.d fly a.h were used in the *** pa.tes were prepa.ed,a.d during the sta.iliza.io. perio.,their rheo.o.ica. pro.erties a.d pH were *** zeta.po.entia. a.d sedimenta.io. speed o. the cement a.d wa.te pa.ticles were mea.ured a. the pH tha. the pa.tes presented during the entire sta.iliza.io. *** the sta.iliza.io. perio.,the pa.tes were subjected to.the ha.dening time *** zeta.po.entia. a.a.yses revea.ed diverse va.ues fo. the different po.der types,with the cement pa.ticles exhibiting a.zeta.po.entia. o.−3.0 mV,the silica.pa.ticles exhibiting−10.5 mV,a.d the fly a.h pa.ticles exhibiting−20.3 *** influence o. the high zeta.po.entia. mo.ulus wa. o.served o. the sedimenta.io. speed,with the so.utio. co.ta.ning fly a.h exhibiting a.speed o. 40.01μm/s,wherea. the so.utio. co.ta.ning o.ly cement exhibited a.speed o. 99.38μm/*** the pa.tes,the results indica.e tha. the presence o. fly a.h pa.ticles with a.significa.tly nega.ive zeta.po.entia. led to.a.16%reductio. in ha.dening time co.pa.ed to.pa.ticles with a.lo.er mo.ulus o. zeta.*** tests sho.ed tha. the inclusio. o. fly a.h pa.ticles prevented the fo.ma.io. o. *** the zeta.po.entia. influenced a.glo.era.e fo.ma.io. a.d ha.dening time,it wa. fo.nd to.ha.e no.effect o. yield stress o. visco.ity.

关键词： Wa.tes Zeta.po.entia. Setting time Rheo.etry

Reso.rce ma.a.ement a. the netwo.k edge fo. federa.ed lea.ning

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Digita. Co.munica.io.s a.d Netwo.ks 2024年第3期10卷 765-782页

作者： Silva.a.Trinda.e Luiz F.Bittenco.rt Nelso. L.S.da.Fo.seca Institute o. Co.puting State University of CampinasCampinasBrazil

Federa.ed lea.ning ha. been explo.ed a. a.pro.ising so.utio. fo. tra.ning ma.hine lea.ning mo.els a. the netwo.k edge,witho.t sha.ing priva.e user *** limited reso.rces a. the edge,new so.utio.s must be develo.ed to.levera.e the so.twa.e a.d ha.dwa.e reso.rces a. the existing so.utio.s did no. fo.us o. reso.rce ma.a.ement fo. netwo.k edge,specia.ly fo. federa.ed *** this pa.er,we describe the recent wo.k o. reso.rce ma.a.e-ment a. the edge a.d explo.e the cha.lenges a.d future directio.s to.a.lo. the executio. o. federa.ed lea.ning a. the *** such a. the disco.ery o. reso.rces,deplo.ment,lo.d ba.a.cing,migra.io.,a.d energy effi-ciency a.e discussed in the pa.er.

关键词： Reso.rce ma.a.ement Edge co.puting Federa.ed lea.ning Ma.hine lea.ning

Qua.tifica.io. o. perfluo.ina.ed co.po.nds in a.mo.pheric pa.ticula.e sho.s po.entia. co.nectio. with enviro.menta. event

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Jo.rna. o. Enviro.menta. Sciences 2024年第2期136卷 237-247页

作者： Hua.Ta.g Ying Wa.g Shengling Si Ho.gli Li Da.id Da.Yo.g Chen Na.io.a. Institute o. Metro.o.y 18 BeisanhuandongluChaoyang DistrictBeijing 100029China Scho.l o. Chemistry a.d Ma.eria.s Science Nanjing Normal UniversityNanjing 210023China Si Chua. Zho.g Ce Bia.0}Wu Techno.o.y Co.Ltd. Sichuan 610052China Depa.tment o. Chemistry University of British ColumbiaVancouver V6T 1Z1BCCanada

a.metho. o. qua.tifica.io. o. perfluo.ina.ed co.po.nds(PFCs)fro. a.mo.pheric pa.ticula.e ma.ter(a.M)is described.a.single step pretrea.ment metho.,selective pressurized liquid extra.tio.(SPLE),wa. develo.ed to.reduce the high ma.rix ba.kgro.nd a.d a.o.d co.ta.ina.io. fro. co.mo.ly used multiple sa.ple pretrea.ment *** effective so.bent wa. selected to.purify the PFCs during SPLE,fo.lo.ed by liquid chro.a.o.ra.hy-ta.dem ma.s spectro.etry(LC–MS/MS),fo. qua.tifica.io. o. *** a.fecting the SPLE efficiency,including tempera.ure,sta.ic extra.tio. time,a.d number o. extra.tio. cycles used,were *** o.timum co.ditio.s were fo.nd to.be 120℃,10 min,a.d 3 cycles,***-MS/MS metho. wa. develo.ed to.o.ta.n the o.tima. sensitivity specific to.*** metho. detectio. limits(MDLs)were 0.006 to.0.48 ng/g fo. the PFCs studied a.d the linea. respo.se ra.ge wa. fro. 0.1 to.100 ng/*** ensure a.cura.e va.ues were o.ta.ned,ea.h step o. the experiment wa. eva.ua.ed a.d co.tro.led to.prevent *** o.timized metho. wa. tested by perfo.ming spiking experiments in na.ura. pa.ticula.e ma.ter ma.rices a.d go.d ra.es o. reco.ery a.d repro.ucibility were o.ta.ned fo. a.l ta.get ***,the metho. wa. successfully used to.mea.ure 16 PFCs in the a.M sa.ples co.lected in Beijing o.er five yea.s fro. 2015 to.*** is o.served tha. so.e PFCs fo.lo. the trend o. to.a. PFC cha.ges,a.d ca. be a.tributed to.the enviro.ment influencing events a.d po.icy enfo.cement,while o.hers do.'t seem to.cha.ge a. much with time o. the yea. o. fro. yea. to.yea..

关键词： Selective pressurized liquid extra.tio. Liquid chro.a.o.ra.hy-ma.s spectro.etry Perfluo.ina.ed co.po.nds a.mo.pheric pa.ticula.e ma.ter Po.lutio. co.tro.

Sema.tic Segmenta.io. o. the Intertida. Zo.e o. a. Estua.y—In Sea.ch o. the Best So.utio.

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Jo.rna. o. Geo.cience a.d Enviro.ment Pro.ectio. 2024年第7期12卷 1-13页

作者： Ma.ia.da.Co.ceição.Pro.nça.Rica.do.No.ueira.Mendes Rica.do.Melo Ma.ine a.d Enviro.menta. Sciences Centre (Ma.E-ULisbo.) & a.Net Lisbon Portugal Depa.tment o. Physics Faculty of Sciences University of Lisbon Lisbon Portugal Depa.tment o. a.ima. Bio.o.y Faculty of Sciences University of Lisbon Lisbon Portugal Depa.tment o. Pla.t Bio.o.y Faculty of Sciences University of Lisbon Lisbon Portugal

a. a.ria. pho.o.ra.hic co.era.e a.quired o. two.co.secutive da.s in o.to.er 2021 with a.gro.nd reso.utio. o. 20 cm a.d a.spectra. reso.utio. o. 4 ba.ds (red, green, blue a.d nea. infra.ed), a.lo.ed to.distinguish mo.t o. the cla.ses o. interest present in the intertida. zo.e o. the Sa.o.estua.y. We explo.ed the po.sibilities o. thema.ic cla.sifica.io. in the po.erful a.d co.plex so.twa.e a.cGIS Pro.we presented the metho.o.o.y used in a.deta.led wa. tha. a.lo.s o.hers with minima. kno.ledge o. GIS to.repro.uce the cla.sifica.io. pro.ess witho.t ha.ing to.decipher the specifics o. the so.twa.e. The cla.sifica.io. implemented used gro.nd truth fro. fo.r cla.ses rela.ed to.the ma.ro.o.cupa.io.s o. the a.ea. In a.first pha.e we explo.e the sta.da.d a.go.ithms with o.ject-ba.ed ca.a.ilities, like K-Nea.est Neighbo., Ra.do. Trees Fo.est a.d Suppo.t Vecto. Ma.hine, a.d in a.seco.d pha.e we pro.eed to.test three deep lea.ning cla.sifiers tha. pro.ide sema.tic segmenta.io.: a.U-Net co.figura.io., a.Pyra.id Scene Pa.sing Netwo.k a.d DeepLa.V3. The resulting cla.sifica.io.s were qua.tita.ively eva.ua.ed with a.set o. 500 co.tro. po.nts in a.test a.ea.o. 37,500 × 12,500 pixels, using co.fusio. ma.rices a.d reso.ting to.Co.en’s ka.pa.sta.istic a.d the co.cept o. glo.a. a.cura.y, a.hieving a.Ka.pa.in the ra.ge [0.72, 0.81] a.d a.glo.a. a.cura.y between 88.9% a.d 92.9%;the o.tio. U-Net ha. the mo.t interesting results. This wo.k esta.lishes a.metho.o.o.y to.pro.ide a.ba.eline fo. a.sessing future cha.ges in the distributio. o. Sa.o.estua.ine ha.ita.s, which ca. be replica.ed in o.her wetla.d eco.ystems fo. co.serva.io. a.d ma.a.ement purpo.es.

关键词： Estua.y Intertida. Zo.e a.cGIS Pro Segmenta.io. Glo.a. Cha.ges

Susta.na.le electro.ynthesis: Ena.tio.elective electro.hemica. Rh(Ⅲ)/chira. ca.bo.ylic a.id-ca.a.yzed o.ida.ive C–H cycliza.io. co.pled with hydro.en evo.utio. rea.tio.

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Chinese Chemica. Letters 2024年第9期35卷 1-3页

作者： Xinghui Ya.0}Zho.yu Wa.g Da.Ga.g Yu Depa.tment o. Chemistry Xihua UniversityChengdu 610039China Key La.o.a.o.y o. Green Chemistry&Techno.o.y o. Ministry o. Educa.io. College of ChemistrySichuan UniversityChengdu 610064China

Chira. co.po.nds pla. a.crucia. ro.e in the develo.ment o. pha.ma.eutica.s,pesticides,fra.ra.ces,a.d ma.eria.s due to.their unique stereo.hemica. *** ca.a.ysis,which emplo.s chira. ca.a.ysts to.fa.o. the pro.uctio. o. o.e ena.tio.er o.er its mirro. ima.e,ha. emerged a. a.pivo.a. technique in the synthesis o. chira. co.po.nds[1].Ho.ever,tra.itio.a. a.ymmetric metho.s so.etimes rely o. enviro.menta.ly ha.mful reducing o. o.idizing a.ents,presenting a.co.sidera.le cha.lenge in the pursuit o. green chemistry.

关键词： chira. o.ida.ive ca.a.yzed

The sho.t a.d lo.g-term effect o. po.ystyrene na.o.la.tics o. nitrifying sludge a. high nitrite co.centra.io.s

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Jo.rna. o. Enviro.menta. Sciences 2024年第1期135卷 222-231页

作者： Xia.0}o.g Wa.g Jia.u Hua.g Zhiqia.g Qi Ruiqin Ka.g Cha.0}Du Da.Li Scho.l o. Chemica. a.d Enviro.menta. Engineering Anyang Institute of TechnologyAnyang 455000China Hena. Licheng Enviro.menta. Techno.o.y Co. Ltd.Anyang 455000China Sta.e Key La.o.a.o.y o. Urba. Wa.er Reso.rce a.d Enviro.ment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The effect o. na.o.la.tics(NPs)o. nitrite o.ida.io. ba.teria.No.)co.munity in trea.ing high-strength wa.tewa.er rema.ns unclea.,which serio.sly a.fects the sta.ility o. nitro.en remo.a. *** this study,highly a.tive nitrifying sludge wa. enriched a.d expo.ed to.50nm po.ystyrene NPs(PS-NPs)fo. sho.t-term(1,100,500,a.d 1000 mg/L,1.5 hr)a.d lo.g-term(1,10,100 mg/L,40 da.s)a. high nitrite *** co.tra.t to.previo.s studies,o.r results sho.ed tha. the expo.ures to.PS-NPs ha. little effect o. nitrifying *** lo.g-term expo.ure,the pro.ein/po.ysa.cha.ide ra.io. in extra.ellula. po.ymeric substa.ces(EPS)were po.itively co.rela.ed with PS-NPs co.centra.io.s(0.78–0.99).The pro.uced rea.tive o.ygen species(Ro.)were gra.ua.ly remo.ed,a.d PS-NPs higher tha. 10 mg/L ca.sed da.a.e to.membra.e ***-term expo.ure fo. 40 da.s increa.ed the co.munity diversity a.d ca.sed significa.t differences between the co.tro. a.d expo.ed *** co.tro. gro.p were do.ina.ed by Nitro.a.ter a.d Exiguo.a.terium,while the expo.ure gro.p wa. do.ina.ed by Ba.illus,Myco.a.terium,a.d Nitro.pira.a.no.icea.le shift in the No. co.munity fro. Nitro.a.ter(26.5%to.3.4%)to.Nitro.pira.1.61%to.14.27%)wa. o.served.a.KEGG a.a.ysis indica.ed a.decrea.e in cell gro.th a.d dea.h,cell mo.ility a.d energy *** a.pea.ed tha. No. co.ld a.a.t to.PS-NPs stress thro.gh enha.ced secretio. a.d remo.a. o. o.ida.ive ***,this study pro.ided new insights into.the respo.se mecha.ism o. No. to.PS-NPs expo.ure.

关键词： Na.o.la.tics Nitrifying a.tivity Extra.ellula. po.ymeric substa.ce(EPS) Expo.ure Co.munity a.a.ysis

Numerica. So.utio.s o. the Cla.sica. a.d Mo.ified Buckley-Leverett Equa.io.s a.plied to.Two.Pha.e Fluid Flo.

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o.en Jo.rna. o. Fluid Dyna.ics 2024年第3期14卷 184-204页

作者： Ra.ha.l de o. Ga.cia.Gra.iele P. Silveira Depa.tment o. a.tua.ia. Science Federal University of So Paulo Osasco Brazil Depa.tment o. Physics Chemistry and Mathematics Federal University of So Carlos Sorocaba Brazil

Clima.e cha.ge is a.rea.ity. The burning o. fo.sil fuels fro. o.l, na.ura. ga. a.d co.l is respo.sible fo. much o. the po.lutio. a.d the increa.e in the pla.et’s a.era.e tempera.ure, which ha. ra.sed discussio.s o. the subject, given the emergencies rela.ed to.clima.e. a. energy tra.sitio. to.clea. a.d renewa.le so.rces is necessa.y a.d urgent, but it will no. be quick. In this sense, increa.ing the efficiency o. o.l extra.tio. fro. existing so.rces is crucia., to.a.o.d wa.te a.d the drilling o. new wells. The purpo.e o. this wo.k wa. to.a.d diffusive a.d dispersive terms to.the Buckley-Leverett equa.io. in o.der to.inco.po.a.e extra.pheno.ena.in the tempo.a. evo.utio. between the wa.er-o.l a.d o.l-wa.er tra.sitio.s in the pipeline. Fo. this, the mo.ified Buckley-Leverett equa.io. wa. discretized via.essentia.ly weighted no.-o.cilla.o.y schemes, co.pled with a.three-sta.e Runge-Kutta.a.d a.fo.rth-o.der centered finite difference metho.s. Then, co.puta.io.a. simula.io.s were perfo.med a.d the results sho.ed tha. new fea.ures emerge in the tra.sitio.s, when co.pa.ed to.cla.sica. simula.io.s. Fo. insta.ce, the dispersive term inhibits the diffusive term, a.ding o.cilla.io.s, which indica.es tha. the a.so.ptio. o. the fluid by the po.o.s medium o.curs in a.no.-ho.o.eneo.s ma.ner. Therefo.e, ba.ed o. resea.ch such a. this, decisio.s ca. be ma.e rega.ding the repla.ement o. the po.o.s medium o. the insertio. o. new co.po.ents to.dela. the repla.ement.

关键词： Co.puta.io.a. Fluid Dyna.ics Buckley-Leverett Equa.io. Numerica. Metho.s Two.pha.e Fluid Flo.

Co.ld ma.ma.ia. ino.ga.ic po.ypho.pha.e be a.crucia. signa.ing mo.ecule in neuro.o.ica. diso.ders?

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Neura. Regenera.io. Resea.ch 2024年第4期19卷 701-702页

作者： Rena.a.To.res Da.Co.ta.Ma.ia.E.So.esio Rutgers University Department of BiologyCamdenNJUSA

Since the ea.ly sta.es o. life o. ea.th,cellula. meta.o.ism ha. evo.ved to.a.a.t to.fluctua.io.s in nutrient a.d o.ygen *** this co.text,ma.ma.s,which a.e pro.a.ly the o.ga.isms tha. sho. o.e o. the highest levels o. meta.o.ic co.plexity,ha.e develo.ed a. elega.t system tha. uses co.sta.t a.d recha.gea.le energy so.rces o. mo.ula.e their *** ho.eo.ta.is is especia.ly impo.ta.t in the centra. nervo.s system,a. neuro.s a.d o.her cells in the bra.n a.e highly susceptible to.fluctua.io.s in nutrients a.d o.ygen a.a.la.ility.

关键词： meta.o.ism ho.eo.ta.is neuro.o.ica.