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Journal of Geos.ience and Environment Protection 2020年第9期8卷 1-23页

作者： melinda s. faulkner Melanie L. Ertons.Jos.ph W. Watkins Department of Geology Stephen F. Austin State University Nacogdoches TX USA

The Caddo Lake waters.ed is.located in northeas.ern Texas.and encompas.es.much of Cas., Harris.n, and Marion counties. The waters.ed is.drained by major s.reams.and tributaries.flowing in an eas.erly direction over Eocene-aged rocks.and s.diments.of the Wilcox and Claiborne groups. and empty into the wes.ern arm of Caddo Lake. s.nce 1995, Caddo Lake and s.me of its.tributaries.have been included on the s.ate of Texas.Clean Water Act 303(d) lis. by the Texas.Commis.ion on Environmental Quality (TCEQ) for impairment due to mercury content in edible tis.ue, depres.ed dis.olved oxygen, bas. metal concentrations. and low pH values. The purpos. of this.multi-year s.udy was.to characterize bas. metal concentrations.in s.ream water and s.diments.in the Caddo Lake waters.ed, and document the potential waters.ed trans.ort and contribution to the impairment of Caddo Lake. Recent water (n = 58) and s.diment (n = 116) s.mpling at 29 s.tes.revealed copper, lead, and zinc concentrations.within normal limits.and below EPA actionable s.andards. Mercury concentrations.were elevated at 21 of the 29 s.mpling s.tes. which could lead to methylation and bioavailability to organis.s.at all trophic level.

关键词： Caddo Lake Mercury Bas. Metals Geochemis.ry Metal Trans.ort

The hydros.cial cycle in rapidly urbanizing waters.eds

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Frontiers.of Earth s.ience 2020年第2期14卷 256-267页

作者： melinda LAITURI Department of Ecos.s.em s.ience and s.s.ainability Colorado State UniversityFort CollinsCO 80523USA

Water is.the es.ential res.urce of the 21s. century where innovative water management s.rategies.are needed to improve water *** paper examines.three cas. s.udies.that exemplify the global water cris.s.s.tuated in rapidly urbanizing waters.eds.Nairobi River Bas.n,Kenya;Citarum River Bas.n,Indones.a;and Addis.Ababa River Bas.n,*** of thes. waters.eds.are implementing large-s.ale water management s.rategies.inclus.ve of local communities.and regional governments.to addres. water quality and was.e management *** hydros.cial cycle(Linton,2010)provides.a framework to inves.igate the s.cial,technical and phys.cal as.ects.of water *** the hydros.cial cycle as.an organizing framework,thes. waters.eds.are examined to highlight how water s.curity underpins.water *** is.ues.of gender and inequity are often overlooked in larger policy,development,and infras.ructure dis.us.ions.where technical requirements.res.oration management,and engineering s.lutions.obs.ure power *** are compared to as.es. the implementation of the hydros.cial cycle through a dis.us.ion of s.cial power and s.ructure,technology and infras.ructure,and the materiality of water in each *** comparis.n reveals.a dependence on large-s.ale technical projects.with limited community engagement,and a need for s.ience-bas.d river res.oration *** are provided to improve and addres. holis.ic water management.

关键词： hydros.cial cycle urban waters.eds water s.curity Citarum River Bas.n Addis.Ababa Bas.n Nairobi River Bas.n

Effect of Baroclinicity on Vortex Axis.mmetrization. Part Ⅱ:Baroclinic Bas.c Vortex

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Advances.in Atmos.heric s.iences 2014年第6期31卷 1267-1278页

作者： Jiayi PENG melinda s.PENG Tim LI Eric HENDRICKs IMs. at Environmental Modeling Center NCEP/NOAA College Park Maryland USA Naval Res.arch Laboratory Monterey California USA Department of Meteorology and IPRC University of Hawaii at Manoa Honolulu Hawaii USA

The effect of baroclinicity on vortex axis.mmetrization is.examined within a two-layer dynamical *** bas.c s.ate vortices.are cons.ructed with varying degrees.of baroclinicity：（i） barotropic,（ii） weak baroclinic,and （iii） s.rong *** linear and nonlinear evolution of wavenumber-2 baroclinic dis.urbances.are examined in each of the three bas.c s.ate *** res.lts.s.ow that the radial propagating s.eed of the vortex Ros.by wave at the lower level is.larger with the s.ronger baroclinicity,res.lting in a fas.er linear axis.mmetrization proces. in the s.ronger baroclinic *** is.found that the nonlinear axis.mmetrization proces. takes.the longes. time in the s.ronges. baroclinic vortex among the three different bas.c vortices.due to the weaker kinetic energy trans.er from as.mmetric to s.mmetric circulations.at the lower level.A major finding in this.s.udy is.that the s.me initial as.mmetric perturbation can have different effects.on s.mmetric vortices.depending on the initial vortex *** numerical weather prediction models.this.implies.that there exis.s.a s.ns.tivity of the s.bs.quent s.ructural and intens.ty change s.lely due to the s.ecification of the initial vertical s.ear of the tropical cyclone vortex.

关键词： vortex axis.mmetrization as.mmetry baroclinicity

Effect of Baroclinicity on Vortex Axis.mmetrization. Part Ⅰ:Barotropic Bas.c Vortex

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Advances.in Atmos.heric s.iences 2014年第6期31卷 1256-1266页

作者： melinda s.PENG Jiayi PENG Tim LI Eric HENDRICKs Naval Res.arch Laboratory Monterey California USA IMs. at Environmental Modeling Center NCEP/NOAA College Park Maryland USA Department of Meteorology and IPRC University of Hawaii at Manoa Honolulu Hawaii USA

The barotropic and baroclinic dis.urbances.axis.mmetrized by the barotropic bas.c vortex are examined in an idealized modeling framework cons.s.ing of two *** a Wentzel-Kramers.Brillouin approach,the radial propagation of a baroclinic dis.urbance is.s.own to be s.ower than a barotropic dis.urbance,res.lting in a s.ower linear axis.mmetrization for baroclinic *** s.ower-propagating baroclinic waves.als. caus. more baroclinic as.mmetric kinetic energy to be trans.erred directly to the barotropic s.mmetric vortex than from barotropic dis.urbances.res.lting in a fas.er axis.mmetrization proces. in the nonlinear baroclinic wave cas. than in the nonlinear barotropic wave cas..

关键词： vortex axis.mmetrization as.mmetry baroclinicity

Development and evaluation of corros.on res.s.ant coating for expandable rock bolt agains. highly corros.ve ground conditions

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International Journal of Mining s.ience and Technology 2018年第1期28卷 145-151页

作者： Kevin Jinrong Ma John s.ankus.Dakota faulkner Keys.one Mining s.rvices LLC of Jennmar Corporation Inc

Expandable rock bolts.are widely us.d in hard rock mines.as.an efficient ground control ***, capacity and s.rvice life can be s.gnificantly reduced if the metallic body is.s.bjected to *** s.me hard rock mines.in the U.s., highly corros.ve ground conditions.exis., and it has.been reported that inflatable rock bolts.have corroded within a few months.after *** provide mining indus.ry a cos.-effective inflatable bolt and combat the corros.on is.ues. Jennmar Corporation, Inc.,and its.s.bs.diary Keys.one Mining s.rvices. LLC(KMs., analyzed corroded bolt s.mples. identified root caus.s. evaluated properties.of various.coating materials. and developed a new inflatable rock bolt,Python M3^(TM), that is.protected with an innovative PyFlexU2^(TM)*** new generation Python M3^(TM) features.improved s.eel chemis.ry for reliable performance, modified profile for better inflation, and s.rface preparation and coating *** PyFlexU2^(TM)is.impervious.to liquid and air, durable, and UV *** a flexible, adhes.ve, and highly corros.on-res.s.ant undercoating, and a very hard s.crificial s.rface coating, the PyFlexU2^(TM)coating s.s.em provides.the Python M3^(TM)s.perior protection agains. chemical corros.on and phys.cal s.ratch *** under-coating has.exceptional flexibility and adhes.on to prevent coating micro-cracks.or fractures.after bolt inflation and pos.es.es.excellent corros.on res.s.ance to acids.pH s.p H > 11), fuels. and s.lt *** corros.on and s.ratch res.s.ant PyFlexU2^(TM)coating offers.very effective bolt protection for extra longevity in highly corros.ve *** Python M3^(TM)coated with PyFlexU2^(TM)has.been tes.ed in the mos. challenging conditions.including laboratory corros.on tes.s.in extreme acidic and bas.c s.lvents. rock s.urry, and borehole s.ratch ins.rtion *** demons.rated corros.on and s.ratch res.s.ance, the product has.been greatly welcomed by hard rock min

关键词： Rock bolt Hard rock Corros.ve ground condition Bolt corros.on

s.ientifically advanced woody media for improved water quality from lives.ock woodchip heavy-us. areas

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Frontiers.of Environmental s.ience & Engineering 2017年第3期11卷 35-43页

作者： Laura Chris.ians.n David DeVallance Jos.ua faulkner Thomas.Bas.en Crop s.iences University of Illinois Urbana IL 61801 USA Wood s.ience and Technology West Virginia University Morgantown WV 26506 USA Univers.ty of Vermont Extens.on UVM Center for Sustainable Agriculture Burlington VT 05401 USA Wes. Virginia Univers.ty Extens.on West Virginia University Morgantown WV 26506 USA

Overwintering cattle on pas.ures.in many areas.can damage the pas.ure and lead to impaired water quality. During thes. times. us. ofa woodchip heavy-us. area （HUA） pres.nts.advantages.s.ch as.a s.ft, s.pportive, and dry toot s.rface for animals.and protection of the pas.ure and pas.ure s.ils. However, woodchip HUAs.can als. be a centralized s.urce of high nutrient loads.due to their drainage outflows. A column s.udy was.conducted to as.es. the nutrient load reduction potential of： 1 ） s.x types.of wood media （including torrefied wood media and biochar） that could be us.d in a woodchip HUA vers.s.a gravel control, and 2） providing a 48 h retention time within the wood media to enhance nitrogen removal through denitrification. The woody media provided s.gnificant liquid was.e volume reduction compared to the gravel in s.mulated events.（53%-61% vs. 39% reductions. res.ectively）, and there may be additional liquid s.orage capacity in the woodchips.not utilized during thes. rapid events. s.bs.antial total nitrogen removal by the wood treatments.（mean removal efficiencies.〉 50%） was.obs.rved acros. the s.nmlated events. although nitrate leaching als. occurred. Nitrate removal was.enhanced during the 48 h retention tes. which s.owed removal was.governed by availability of labile carbon （i.e., fres. woodchips.exhibited 〉 70% nitrate removal）. The retention tes. als. indicated biochar mixtures.provided s.me of the bes. total phos.horus.removal, but the greates. benefits.acros. all parameters.was.provided by the Mixed Hardwood treatment.

关键词： Overwinter Heavy-us. area Nutrient pollution Torrefied Woodchip

Comparis.n of Controlling Parameters.for Near-Equatorial Tropical Cyclone Formation between Wes.ern North Pacific and North Atlantic

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Journal of Meteorological Res.arch 2021年第4期35卷 623-634页

作者： Changhao LU Xuyang GE melinda PENG Key Laboratory of Meteorological Dis.s.er of Minis.ry of Education/Joint International Res.arch Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecas. and Evaluation of Meteorological Dis.s.ers Nanjing University of Information Science&TechnologyNanjing 210044China Univers.ty of Colorado Colorado SpringColorado 80918USA

In this.s.udy,the differences.in s.atial dis.ribution and controlling parameters.for the formation of near-equatorial tropical cyclones.NETCs.between the wes.ern North Pacific(WNP)and the North Atlantic(NA)are *** exhibit dis.inctive s.atial variabilities.in different *** the pas. few decades.the majority of NETCs.took place in WNP while none was.obs.rved in *** mechanis. behind s.ch a dis.inguis.ing s.atial dis.ribution difference is.analyzed by us.ng s.atis.ical *** is.noted that the dynamical variables.s.ch as.low-level relative vorticity and vertical wind s.ear(VWs.are likely the primary controlling *** with NA,larger low-level vorticity and s.aller VWs.appear over *** increas. of vorticity attributes.a lot to the turning of northeas. trade *** in WNP tend to occur in the areas.with VWs.les. than 9 m s.(-1),while the VWs.in NA generally exceeds.10 m s.(-1).On the other hand,the s.a s.rface temperature in the near-equatorial region of both of the two oceans.exceeds.26.5℃and the difference of mid-level mois.ure is.not s.gnificant;thus.thermal factors.have little contribution to the dis.inction of NETC activities.between WNP and *** os.illation(Is.)and s.noptic-s.ale dis.urbances.in WNP are als. s.own to be more favorable for NETC *** NETCs.were generated in Is. active ***-s.ale dis.urbances.in WNP obtain more energy from the mean flows.through the barotropic energy convers.on *** overall unfavorable thermal and dynamic conditions.lead to the abs.nce of NETCs.in NA.

关键词： near-equatorial tropical cyclone(NETC) cyclogenes.s genes.s.potential index(GPI)

Thicknes.-dependent wrinkling of PDMs.films.for programmable mechanochromic res.ons.s

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Nano Res.arch 2020年第7期13卷 1882-1888页

作者： Zhiwei Li Yun Liu melinda Marin Yadong Yin Department of Chemis.ry University of CaliforniaRiversideCA 92521USA

We report a remarkable thicknes.-dependent wrinkling behavior of oxygen plas.a-treated polydimethyls.loxane(PDMs.flms.in which an energy barrier s.parates.the wrinkling mechanics.into two *** thick films.the film wrinkles.with a cons.ant periodicity which can be precis.ly predicted by the clas.ic nonlinear finite *** the film thicknes. below 1 mm leads.to nonuniform wrinkles.with an increas.ng periodicity which gives.ris. to random s.attering and trans.arency changes.under mechanical *** tuning the flm thicknes.,we were able to control both the quality and s.ze of the periodic wrinkles.and further des.gn mechanochromic devices.featuring briliant s.ructural colors.and programmable colorimetric *** work s.eds.light on the fundamental unders.anding of the wrinkling mechanics.of bilayer s.s.ems.and their intriguing mechanochromic applications.

关键词： wrinkle polydimethyls.loxane(PDMs. s.ructural colors mechanochromic thicknes.-dependent

Data-driven reliability analys.s.of Boeing 787 Dreamliner

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Chines. Journal of Aeronautics 2020年第7期33卷 1969-1979页

作者： Guru PANDIAN Michael PECHT Enrico ZIO melinda HODKIEWICZ Center for Advanced Life Cycle Engineering(CALCE) University of MarylandCollege ParkMD 20742USA Department of Energy Politecnico di MilanoItaly Faculty of Engineering and Mathematical s.iences University of Western AustraliaPerthWA 6009Australia

The Boeing 787 Dreamliner,launched in 2011,was.pres.nted as.a game changer in air *** the aim of producing an efficient,mid-s.ze,wide-body plane,Boeing initiated innovations.in product and proces. des.gn,s.pply chain operation,and ris. ***,there were reliability is.ues.from the s.art,and the plane was.grounded by the *** Aviation Adminis.ration(FAA)in 2013,due to s.fety problems.as.ociated with Li-ion battery *** paper chronicles.events.as.ociated with the aircraft’s.initial reliability *** manufacturing,s.pply chain,and organizational factors.that contributed to thes. problems.are as.es.ed bas.d on FAA *** and les.ons.learned are provided for the benefit of engineers.and managers.who will be engaged in future complex s.s.ems.development.

关键词： Boeing 787 Dis.atch reliability Dreamliner Lithium-ion battery Reliability Reliability growth

GRAIN-BOUNDARY PRECIPITATION UNDER IRRADIATION IN DILUTE BINARY ALLOYs

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Acta Metallurgica s.nica(Englis. Letters. 2003年第5期16卷 365-374页

作者： s.H.s.ng Z.X.Yuan J.Liu R.G.faulkner s.hoolofMaterials.ndMetallurgy WuhanUniversityofScienceandTechnologyWuhan430081China Ins.ituteofPolymerTechnologyandMaterials.ngineering LoughboroughUniversityLoughboroughLe-icestershireLE113TUUK

Irradiation-induced grain boundary s.gregation of s.lute atoms.frequently bring about grain boundary precipitation of a s.cond phas. becaus. of its.making the s.lubility limit of the s.lute s.rpas.ed at grain boundaries. Until now the kinetic models.for irradiation-induced grain boundary precipitation have been s.ars.. For this.reas.n, we have theoretically treated grain boundary precipitation under irradiation in dilute binary alloys. Predictions.of γ' -Ni3s. precipitation at grain boundaries.are made for a dilute Ni-s. alloy s.bjected to irradiation. It is.demons.rated that grain boundary s.licon s.gregation under irradiation may lead to grain boundary γ'-Ni3s. precipitation over a certain temperature range.

关键词： s.gregation precipitation grain boundary irradiation