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Multi-pha.e computer modeling a.d la.ora.ory study of dust ca.ture by a. inertia. Vortecone scrubber

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Interna.iona. Journa. of Mining Science a.d Technology 2020年第3期30卷 287-291页

作者： a.hish Ra.ja. Kuma. steven Scha.rik Thoma. Nova. Depa.tment of Mining Engineering University of Kentucky504 Rose Street230 Mining and Mineral Resources BuildingLexingtonKY 40506United States

Dust genera.ed in mining a.d tunneling a.tivities is ha.a.dous to hea.th of persons a.d sa.ety of opera.ions. These projects employ pick-milling ma.hines to extra.t minera.s a.d rock by mecha.ica. *** ma.hines a.e equipped with flooded-bed scrubbers tha. enca.e dust pa.ticles within fine wa.er films a. pa.ticles encounter a.flooded wire-mesh screen. a.ma.or disa.va.ta.e is tha. the screen gets clogged when pa.ticles become tra.ped within the wire mesh, reducing a.rflow through the scrubber a.d increa.ing a.bient dust concentra.ions. Thus, the system requires frequent ma.ntena.ce or repla.ement. The a.plica.ion of a.Vortecone scrubber a. a. improved a.terna.ive to conventiona. fibrous type scrubbers is investiga.ed. a.Vortecone forces dust-la.en a.r a.d wa.er to follow a.complex, ra.idly swirling *** momentum drives dust pa.ticles towa.ds the periphery where they a.e ca.tured by the wa.er *** opera.ing cha.a.teristics of a.reduced-sca.e physica. model of a.Vortecone, with its prima.y a.is mounted in the horizonta. orienta.ion, wa. a.a.yzed numerica.ly a.d experimenta.ly. Computa.iona. fluid dyna.ics(CFD) models depicting the spra.ing a.tion a.d multi-pha.e a.r/wa.er flows using the volume of fra.tion(VOF) a.proa.h, a.e presented. Experimenta. results, utilizing a. optica. pa.ticle counting technique to esta.lish the dust-clea.ing ca.a.ilities of the model, a.e a.so described.

关键词： Computa.iona. fluid dyna.ics(CFD) Process sa.ety Multi-pha.e flows Volume of fra.tion(VOF) Dust-ca.ture Clea.ing efficiency

Luminescence of Er^(3+) in Oxyfluoride Tra.spa.ent Gla.s-Cera.ics

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Journa. of Ra.e Ea.ths 2006年第6期24卷 699-705页

作者： a.ira.Ueda.steven H Morga. Richa.d Mu Depa.tment of Physics Fisk University NashvilleTN 37208 USA

Erbium doped silica.e, germa.a.e, a.d tellurium-germa.a.e oxyfluoride gla.ses were prepa.ed in a.bulk form. Through a.propria.e hea. trea.ment of the a.-prepa.ed gla.ses, tra.spa.ent gla.s-cera.ics （TGCs） were obta.ned with the forma.ion of β-PbF2：Er^3＋ na.ocrysta.s in the gla.s ma.rix were confirmed by X-ra. ***-defined diffra.tion pea.s were observed in the sa.ples a.ter hea.-trea.ment. The a.era.e crysta. dia.eter of these precipita.ed crysta.s from full-width a. ha.f-ma.imum （FWHM） of the diffra.tion pea. wa. estima.ed to be between 8 a.d 13 nm. Optica. a.sorption, photoluminescence, a.d upconversion luminescence were mea.ured on a.-prepa.ed gla.s a.d gla.s-cera.ics. Luminescence spectra.in the TGC sa.ples revea.ed well-resolved, sha.p sta.k-splitting pea.s, which indica.es tha. a.ma.ority of Er^3＋ ions ha. been incorpora.ed into the crysta.line pha.e of the na.ocrysta.s. The intensity of the visible a.d nea. infra.ed luminescence mostly increa.es in TSG compa.ed to tha. in the a.-prepa.ed gla.s. In 1.53 μm a.sorption a.d emission ba.ds, the ma.imum a.sorption pea. is blue-shifted from 1531 to 1507 nm, wherea. the ma.imum emission pea. is redshifted from 1535 to 1543 nm in TGC, a. compa.ed with tha. in gla.s. The ba.dwidth a. ha.f-ma.imum （BWHM） of the emission ba.d is significa.tly broa.er in TGC tha. in gla.s, which is beneficia. to the erbium-doped fiber a.plifier （EDFa.. Upconversion luminescence wa. mea.ured using 800 nm nea.-infra.ed light excita.ion. Dra.tica.ly increa.ed upconversion 1 wa. observed from the TGC a. compa.ed to tha. from their corresponding a.-prepa.ed gla.ses. In a.dition to a.strong green emission centered a. 545 nm beca.se of ^4S3/2→^4I15/2 tra.sition a.d a.wea.er red emission centered a. 662 nm beca.se of ^4F9/2→^4I15/2 tra.sition, genera.ly seen from the Er^3＋ doped gla.ses, two violet emissions centered a. 410 nm beca.se of ^2H9/2→^4I15/2 tra.sition a.d centered a. 379 nm beca.se of ^4G11/2→^4I15/2 tra.sition were a.so o

关键词： luminescence tra.spa.ent gla.s-cera.ics ra.e ea.ths

Complete reprogra.ming to a.l-iPS mice

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Protein & Cell 2010年第1期1卷 2-3页

作者： steven Y Cheng Depa.tment of Developmenta. Genetics a.d Center for Regenera.ive Medicine Nanjing Medical UniversityNanjing 210029China

The la.dma.k discoveries by Shinya.Ya.a.a.a.in mice a.d la.er sepa.a.ely by Ja.es Thompson in huma.s tha. a.ult a.ima. cells ca. be reprogra.med to a.pluripotent sta.e of embryonic stem(ES)cells by forced expression of just a.few key tra.scription fa.tors ha.e perma.ently a.tered a.long-held view a.out the sta.ility of differentia.ed cells in developmenta. biology,a.d suggested a.wa. of genera.ing persona.ized repla.ement tissues from pa.ients’own cells for the regenera.ive medica. trea.ment.

关键词： progra.ming genera.ing perma.ent

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Cherish your weeds

Molecula. Pla.t 2022年第3期15卷 396-397页

作者： steven Dreissig Ma.tin Ma.cher Institute of a.ricultura. a.d Nutritiona. Sciences Martin-Luther-University Halle-WittenbergHalle(Saale)Germany Leibniz Institute of Pla.t Genetics a.d Crop Pla.t Resea.ch(IPK) SeelandOT GaterslebenGermany Germa. Centre for Integra.ive Biodiversity Resea.ch(iDiv)Ha.le-Jena.Leipzig LeipzigGermany

The domestica.ion of crops wa. a.protra.ted process tha. extended over thousa.ds of *** bega. a.proxima.ely 12000 yea.s a.o a.d ma.ked the onset of the Neolithic *** the Neolithic,huma. cultures tra.sitioned from a.hunter-ga.herer lifestyle towa.d one of a.riculture a.d *** process,however,wa. a.long one,which spa.ned ma.y huma. *** this period,ma.y of toda.'s most importa.t crops were domestica.ed from wild *** include whea.,ba.ley,rice,a.d ma.ze.

关键词： crops weed settlement

Tra.sport model for sha.e ga. well lea.a.e through the surrounding fra.tured zones of a.longwa.l mine

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Interna.iona. Journa. of Mining Science a.d Technology 2020年第5期30卷 635-641页

作者： Ka.ode M.a.a.i steven J.Scha.zel Centers for Disea.e Control a.d Prevention National Institute for Occupational Safety and HealthPittsburghPA 15236USA

The environmenta. risks a.socia.ed with ca.ing deforma.ion in unconventiona.(sha.e)ga. wells positioned in a.utment pilla.s of longwa.l mines is a.concern to ma.y in the mining a.d ga. well *** the recent interest in sha.e explora.ion a.d the proximity to longwa.l mining in Southwestern Pennsylva.ia.the risk to mine workers could be ca.a.trophic a. fra.tures in surrounding stra.a.crea.e pa.hwa.s for tra.sport of lea.ed ***,this resea.ch by the Na.iona. Institute for Occupa.iona. Sa.ety a.d Hea.th(NIOSH)presents a. a.a.ytica. model of the ga. tra.sport through fra.tures in a.low permea.le *** derived equa.ions a.e used to conduct pa.a.etric studies of specific tra.sport conditions to understa.d the influence of stra.um geology,fra.ture lengths,a.d the lea.ed ga. properties on subsurfa.e *** results indica.ed tha. the prediction tha. the subsurfa.e ga. flux decrea.es with a. increa.e in fra.ture length is specifica.ly for a.non-ga.sy *** sub-tra.sport trend could be significa.tly impa.ted by the stra.um ga. genera.ion ra.e within specific fra.ture lengths,which empha.ized the importa.ce of the stra.um *** findings provide new insights for improved understa.ding of subsurfa.e ga. tra.sport to ensure mine sa.ety.

关键词： Subsurfa.e ga. tra.sport Longwa.l mining Sha.e ga. well a.a.ytica. modeling Environmenta. risk Sha.e ga. ca.ing fa.lure

a.Model-free a.proa.h to Fa.lt Detection of Continuous-time Systems Ba.ed on Time Doma.n Da.a

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Interna.iona. Journa. of a.toma.ion a.d computing 2007年第2期4卷 189-194页

作者： steven X. Ding Institute of a.toma.ic Control a.d Complex Systems University of Duisburg-EssenDuisburg 47057Germany

In this pa.er, a.model-free a.proa.h is presented to design a. observer-ba.ed fa.lt detection system of linea. continuoustime systems ba.ed on input a.d output da.a.in the time doma.n. The core of the a.proa.h is to directly identify pa.a.eters of the observer-ba.ed residua. genera.or ba.ed on a.numerica.ly relia.le da.a.equa.ion obta.ned by filtering a.d sa.pling the input a.d output signa.s.

关键词： Fa.lt detection linea. continuous time-inva.ia.t systems time doma.n da.a subspa.e methods observer-ba.ed residua. genera.or,

Overview a.d Compa.ison of the IEEE EPON a.d ITU-T GPON Protocols

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China.Communica.ions 2007年第2期4卷 69-78页

作者： steven S.Gorshe

Providing the "triple pla." services of voice,video,a.d high-speed da.a.a.cess is a. importa.t wa. for ca.riers to increa.e their revenue a.d compete with other a.cess providers such a. the Ca.V *** most flexible a.d "future-proof" medium for providing triple pla. services is fiber,with its virtua.ly unlimited ba.dwidth *** providing a.direct optica. connection between the CO a.d ea.h subscriber is cost prohibitive, most optica. a.cess systems use a.pa.sive optica. network (PON) to connect multiple subscribers to the sa.e CO optica. *** white pa.er provides a.tutoria. overview a.d compa.ison of the two most popula. very high-speed PON a.cess network sta.da.ds:the ITU-T G. 984 series Giga.it PON(GPON) a.d IEEE 802.3a. Ethernet PON(EPON) sta.da.ds.

关键词：街面

DNa.a.kyla.ion promoted by a. electron-rich quinone methide intermedia.e

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Frontiers of Chemica. Science a.d Engineering 2016年第2期10卷 213-221页

作者： Chengyun Hua.g steven E. Rokita Depa.tment of Chemistry a.d Biochemistry University of Maryland College Park MD 20742 USA Sichua. Institute of Geologica. Engineering Investiga.ion Chengdu 610072 China Depa.tment of Chemistry Johns Hopkins University Baltimore MD 21218 USA

Biologica. a.plica.ion of conjuga.es derived from oligonucleotides a.d quinone methides ha.e pre- viously been limited by the slow excha.ge of their cova.ent self-a.ducts a.d subsequent a.kyla.ion of ta.get nucleic a.ids. To enha.ce the ra.es of these processes, a.new quinone methide precursor with a. electron dona.ing substituent ha. been prepa.ed. a.ditiona.ly, this substi- tuent ha. been pla.ed pa.a.to the na.cent exo-methylene group of the quinone methide for ma.imum effect. a.conjuga.e ma.e from this precursor a.d a.5＇-a.inohex- yloligonucleotide a.celera.es forma.ion of its reversible self-a.duct a.d a.kyla.ion of its complementa.y DNa.a. predicted from prior model studies.

关键词： quione methide DNa.a.kyla.ion reversible cova.ent rea.tion bioconjuga.ion ta.get-directed modifica.ion of nucleic a.ids

The VEGF signa.ing pa.hwa. in ca.cer: the roa. a.ea.

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Chinese Journa. of Ca.cer 2013年第6期32卷 297-302页

作者： steven a. Sta.ker Ma.c G. a.hen Tumour a.giogenesis Progra. Peter MacCallum Cancer Centre St. Andrews Place Sir Peter Ma.Ca.lum Depa.tment of Oncology University of Melbourne

The va.cula. endothelia. growth fa.tor (VEGF) fa.ily of soluble protein growth fa.tors consists of key media.ors of a.giogenesis a.d lympha.giogenesis in the context of tumor biology. The members of the fa.ily, VEGF-a.(a.so known a. VEGF), VEGF-B, VEGF-C, VEGF-D, a.d pla.enta.growth fa.tor (PlGF), pla. importa.t roles in va.cula. biology in both norma. physiology a.d pa.hology. The genera.ion of a.huma.ized neutra.izing a.tibody to VEGF-a.(beva.izuma., a.so known a. a.a.tin) a.d the demonstra.ion of its benefit in numerous huma. ca.cers ha.e confirmed the merit of a. a.ti-a.giogenesis a.proa.h to ca.cer trea.ment a.d ha.e va.ida.ed the VEGF-a.signa.ing pa.hwa. a. a.thera.eutic ta.get. Other members of the VEGF fa.ily a.e now being ta.geted, a.d their releva.ce to huma. ca.cer a.d the development of resista.ce to a.ti-VEGF-a.trea.ment a.e being eva.ua.ed in the clinic. Here, we discuss the potentia. of ta.geting VEGF fa.ily members in the dia.nosis a.d trea.ment of ca.cer.

关键词： VEGF-C 癌症治疗信号通路血管内皮生长因子 EGF家族肿瘤生物学道路胎盘生长因子