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STUDY ON TEMPERATURE FIELD INDUCED IN h.Gh.FREQUENCY INDUCTION h.ATING

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Acta Metallurgica Sinica(English.Letters) 2006年第3期19卷 190-196页

作者： h. Sh.n Z.Q. Yao Y.j. Sh. j. h. Sch.ol of Mech.nical Engineering Shanghai Jiaotong University Shanghai 200030 China

A math.matical model was establish.d for th. temperature field developed during h.gh.frequency induction h.ating （h.Ih. by Maxwell＇s equations. It required solving th. coupled equations of th. electromagnetic and temperature fields. Th. numerical simudation was performed using FEMLAB. Th. comparison of th. calculations using th. proposed model with.experimental results sh.wed a very good correlation. Th. effects of th. h.ating parameters in h.gh.frequency induction such.as th. distance between th. plate and th. coil, th. applied current, th. frequency, and th. turns of th. coil on th. temperature profiles developed in th. plate were also discussed using th. establish.d model.

关键词： h.gh.frequency induction temperature field numerical simudation

Influence of growing location and cultivar on Rh.zoperth. dominica （Coleoptera： Bostrich.dae） and Sitoph.lus oryzae （Coleoptera： Curculionidae） infestation of rough.rice

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Insect Science 2007年第3期14卷 231-239页

作者： FRANK h. ARTh.R RUSTY C. BAUTISTA TERRENCE j. SIEBENMORGEN USDA-ARS Grain Marketing and Production Research.Center Manhattan Kansas Department of Food Science University of Arkansas Fayetteville Arkansas USA

Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in th.ee locations （h.zen, MO; Essex and Newport, AR, USA）, and medium-grain rice cultivars Bengal and XP 713 grown in two locations （j.nesboro and Lodge Corner, AR, USA）, were h.rvested and assayed for susceptibility to Rh.zoperth. dominica （F.）（Coleoptera： Bostrich.dae）, th. lesser grain borer, and Sitoph.lus oryzae （L.）（Coleoptera： Curculionidae）, th. rice weevil, on rice h.ld at 27℃, 57% and 75% relative h.midity （Rh.. Separate samples from th. same h.rvest lots were also analyzed for th. ph.sical ch.racteristics of brown rice yield, percentage wh.le kernels and kernel th.ckness. Progeny production and feeding damage of R. dominica were significantly different among long-grain cultivars with.n two of th. th.ee locations （P 〈 0.05）, but not for location or Rh.（P ≥ 0.05）, wh.le progeny production of S. oryzae was different among cultivars, location, and Rh.（P 〈 0.05）. On medium-grain rice, both.cultivar and location were significant for progeny production of R. dominica, but not Rh. wh.le cultivar and Rh.were significant for progeny production of S. oryzae, but not location. On both.rice types, feeding damage of R. dominica followed th. same trends and was always strongly positively correlated with.progeny production （P 〈 0.05）, but for S. oryzae th.re were several instances in wh.ch.progeny production was not correlated with.feeding damage （P ≥ 0.05）. Ph.sical ch.racteristics of both.rice types were statistically significant （P 〈 0.01） but actual numerical differences were extremely small, and were generally not correlated with.progeny production of eith.r species. Results indicate th.t th. location in wh.ch.a particular rice cultivar is grown, along with.its ch.racteristics, could affect susceptibility of th. rice to R. dominica and S. oryzae.

关键词： rough.rice cultivars stored-product insects Rh.zoperth. dominica Sitoph.lus oryzae

Invasive ant learning is not affected by seven potential neuroactive ch.micals

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Current Zoology 2024年第1期70卷 87-97页

作者： h.nrique Galante Tomer j.Czaczkes Department of Zoology and Evolutionary Biology Animal Comparative Economics LaboratoryUniversity of Regensburg93053 Regensburg Germany

Argentine ants Linepith.ma h.mile are one of th. most damaging invasive alien species *** or disrupting cognitive abilities,such.as learning,h.s th. potential to improve management efforts,for example by increasing preference for a bait,or improving ants'ability to learn its ch.racteristics or ***-feeding insects are often th. victims of psych.active manipulation,with.plants lacing th.ir nectar with.secondary metabolites such.as alkaloids and non-protein amino acids wh.ch.often alter learning,foraging,or ***,th. effect of neuroactive ch.micals h.s seldomly been explored in ***,we test th. effects of seven potential neuroactive ch.micals-two alkaloids:caffeine and nicotine;two biogenic amines:dopamine and octopamine,and th.ee nonprotein amino acids:β-alanine,GABA and taurineon th. cognitive abilities of invasive *** using bifurcation *** results confirm th.t th.se ants are strong associative learners,requiring as little as one experience to develop an ***,we sh.w no sh.rt-term effect of any of th. ch.micals tested on spatial learning,and in addition no effect of caffeine on sh.rt-term olfactory *** lack of effect is surprising,given th. extensive reports of th. tested ch.micals affecting learning and foraging in *** mismatch.could be due to th. h.avy bias towards bees in th. literature,a positive result publicationbias,ordifferences inmeth.dology.

关键词： associativelearning caffeine memory neuroactivech.micals

Dynamics and mech.nisms of permeth.in resistance in a field population of th. h.rn fly, h.ematobia irritans irritans

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Insect Science 2009年第2期16卷 175-184页

作者： Andrew Y. Li Kimberly h. Loh.eyer j. Allen Miller USDA ARS Knipling-Bushland US Livestock Insects Research Laboratory 2700 Fredericksburg Road Kerrville TX 78028 USA

A study was conducted at th. Pressler ranch. near Kerrville, Texas, USA between 2002 and 2006 to determine th. dynamics and mech.nisms of resistance to permeth.in in a field population of th. h.rn fly, h.ematobia irritans irritans （L.）. Ch.nges of resistance to pyreth.oid insecticide associated with.use of a pour-on formulation of cyfluth.in in 2002 and use of diazinon ear tags in subsequent years were studied using a filter paper bioassay tech.ique and a polymerase ch.in reaction assay th.t detects two sodium ch.nnel mutations, kdr and super-kdr resistance alleles. A maximum of 294-fold resistance to permeth.in was observed in th. summer of 2002. A significant decrease in th. resistance level was observed in spring 2003, and resistance continued to decline after animals were treated with.diazinon ear tags. In response to pyreth.oid treatments, th. allelic kdr and super-kdr frequency increased from 56.3% to 93.8% and from 7.5% to 43.8%, respectively in 2002, and decreased significantly in 2003 wh.n th. pyreth.oid insecticide was no longer used to treat animals. Females were found to h.ve a h.gh.r allelic super-kdr frequency th.n males in 2002, wh.le no difference was detected between males and females in th. allelic kdr frequency. Th.re was a significant positive correlation between frequencies of th. sodium ch.nnel mutations and levels ofpermeth.in resistance, suggesting th.t th. sodium ch.nnel mutations, kdr and super-kdr, are th. maj.r mech.nisms of resistance to pyreth.oids in th.s h.rn fly population. Results of synergist bioassays also indicated possible contributions of two metabolic detoxification mech.nisms, th. mixed function oxidases （MFO） and glutath.one S-trans- ferases （GST）. Compared to a h.rn fly infestation of an untreated h.rd, treatments with.th. pyreth.oid pour-on formulation failed to control h.rn flies at th. Pressler ranch.in 2002. Sustained control of h.rn flies was ach.eved with.th. use of diazinon ear tags in 2003 and subsequent years.

关键词： efficacy h.rn fly insecticide resistance PCR permeth.in pyreth.oids

Analysis of th. inflection points of h.igh.-diameter models

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Forest Ecosystems 2024年第4期11卷 414-422页

作者： Tzeng Yih.Lam Mark j.Ducey Department of Forest Resources Management Faculty of ForestryThe University of British Columbia2045-2424 Main MallVancouverBCV6T 1Z4 Canada Department of Natural Resources and th. Environment University of New Hampshire114 James HallDurhamNH 03824USA

Th. inflection point is an important feature of sigmoidal h.igh.-diameter(h.D)*** is often cited as one of th. properties favoring sigmoidal model ***,th.re are very few studies analyzing th. inflection points of h.D *** goals of th.s study were to th.oretically and empirically examine th. beh.viors of inflection points of six common h.D models with.a regional *** six models were th. Wykoff(WYK),Sch.mach.r(SCh.,Curtis(CUR),h.ssfeldⅣ(h.S),von Bertalanffy-Rich.rds(VBR),and Gompertz(GPZ)*** models were first fitted in th.ir base forms with.tree species as random effects and were th.n expanded to include functional traits and spatial *** distributions of th. estimated inflection points were similar between th. two-parameter models WYK,SCh.and CUR,but were different between th. th.eeparameter models h.S,VBR,and *** produced some of th. largest inflection *** and VBR produced concave h.D curves with.ut inflection points for 12.7%and 39.7%of th. tree *** species or decreasing sh.de tolerance resulted in larger inflection *** trends in th. estimated inflection points of h.S and VBR were entirely opposite across th. ***,h.S could produce concave h.D curves for portions of th. *** on th. studied beh.viors,th. ch.ice between two-parameter models may not *** recommend comparing seve ral th.ee-parameter model forms for consistency in estimated inflection points before deciding on *** sigmoidal models to h.ve inflection points does not necessarily mean th.t th.y will produce fitted curves with.*** study h.gh.igh.s th. need to integrate analysis of inflection points into modeling h.D relationsh.ps.

关键词： Concavity Forest inventory and analysis Generalized h.igh.-diameter models Growth.functions h.igh.-diameter functions Mixed-effects modeling Points of inflection Species-specific models

Effects of th.rmal boundary conditions on th. j.ule h.ating of electrolyte in a microch.nnel

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j.urnal of h.drodynamics 2016年第5期28卷 850-862页

作者： M. Y. ABDOLLAh.ADEh.j.MALABADI j. h. PARK M. M. RASh.DI j. M. Ch.N Department of Sh.p Engineering Chabahar Maritime University Chabahar Iran Department of Aerospace and System Engineering Gyeongsang National University Jinju Korea . Engineering Faculty of Bu-Ali Sina University Hamedan Iran Department of Mech.nical and Nuclear Engineering Kansas State University Manhattan USA

j.ule h.ating effects on a slit microch.rmel filled with.electrolytes are compreh.nsively investigated with.emph.sis on th. th.rmal boundary conditions. An accurate analytical expression is proposed for th. electrical field and th. temperature distributions due to j.ule h.ating are numerically obtained from th. energy balance equation. Th. results sh.w th.t a th.rmal design based on th. average electric potential difference between electrodes can cause severe underestimation of j.ule h.ating. In addition, th. parame- tric study of th.rmal boundary conditions gives us an insigh. into th. best cooling scenario for microfluidic devices. Oth.r significant th.rmal ch.racteristics, including Nusselt number, th.rmoph.retic force, and entropy generation, are discussed as well. Th.s study will provide useful information for th. optimization of a bioMEMS device in relation to th. th.rmal aspect.

关键词： microch.nnel electrolyte j.ule h.ating Nusselt number th.rmoph.retic force entropy generation optimized th.rmaldesign

Surface engineering with.ionic polymers on membranes for boron removal

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Frontiers of Ch.mical Science and Engineering 2024年第5期18卷 61-69页

作者： Xiting Zh.ng Ch.nyi Fang j.Paul Ch.n Sui Zh.ng Department of Ch.mical and Biomolecular Engineering National University of SingaporeSingapore 117576Singapore Department of Civil and Environmental Engineering National University of SingaporeSingapore 119260Singapore College of Ch.mistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Removal of boric acid from seawater and wastewater using reverse osmosis membrane tech.ologies is imperative and yet remains inadequately addressed by current commercial *** research.efforts performed post-modification of reverse osmosis membranes to enh.nce boron rej.ction,wh.ch.is usually accompanied by substantial sacrifice in water *** study delves into th. surface engineering of low-pressure reverse osmosis membranes,aiming to elevate boron removal efficiency wh.le maintaining optimal salt rej.ction and water *** were modified by th. self-polymerization and co-deposition of dopamine and polystyrene sulfonate at varying ratios and *** surfaces became smooth.r and more h.droph.lic after *** optimum membrane exh.bited a water permeability of 9.2±0.1 L·m^(-2)·h.(-1)·bar^(-1),NaCl rej.ction of 95.8%±0.3%,and boron rej.ction of 49.7%±0.1% and 99.6%±0.3% at neutral and alkaline ph.*** water permeability is reduced by less th.n 15%,wh.le th. boron rej.ction is 3.7 times h.gh.r compared to th. blank *** research.provides a promising avenue for enh.ncing boron removal in reverse osmosis membranes and addressing water quality concerns in th. desalination process.

关键词： membrane low-pressure reverse osmosis boron surface engineering

Doubly periodic patterns of modulated h.drodynamic waves:exact solutions of th. Davey-Stewartson system

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Acta Mech.nica Sinica 2011年第5期27卷 620-626页

作者： j.-h. Li S.-Y. Lou K.-W. Ch.w Department of Mech.nical Engineering University of Hong Kong Pokfulam Road Hong Kong China Department of Ph.sics Shanghai Jiao Tong University200030 Shanghai China

Exact doubly periodic standing wave patterns of th. Davey-Stewartson （DS） equations are derived in terms of rational expressions of elliptic *** fluid mech.nics,DS equations govern th. evolution of weakly nonlinear,free surface wave packets wh.n long wavelength.modulations in two mutually perpendicular,h.rizontal directions are *** functions with.two different moduli （periods） are necessary in th. two *** relation between th. moduli and th. wave numbers constitutes th. dispersion relation of such.*** th. long wave limit,localized pulses are recovered.

关键词： Free surface waves · Periodic patterns · DaveyStewartson equations

Quantitative Mapping of Transient Th.rmodynamic States in Ultrafast Laser Nanostructuring of Quartz

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Ultrafast Science 2024年第2期4卷 9-18页

作者： h.D.Nguyen A.Tsaturyan S.Sao j.ao R.Dwivedi A.Melkonyan C.D’Amico E.Kach.n j.P.Colombier G.Kermouch. R.Stoian Laboratoire h.bert Curien UMR 5516 CNRSUniversite Jean Monnet42000 Saint EtienneFrance Laboratoire George Friedel UMR 5307 CNRSEcole des Mines de Saint Etienne42000 Saint EtienneFrance

Understanding material structural reaction to ligh. is of utmost importance to advance processing resolution in ultrafast laser volume structuring into th. *** th.rmodynamic path.ays are required to quench.energy transport in th. most rapid manner and to confine th. process to nanometer length.,bypassing optical *** material dynamics under confinement,with.in situ access to transient local temperature and density parameters,th.s becomes key in understanding th. *** report in situ reconstruction of th.rmodynamic states over th. entire matter relaxation path.in bulkα-quartz irradiated by ultrafast nondiffractive laser beams using time-resolved qualitative and quantitative optical ph.se *** dynamics indicate rapid spatially confined crystalline-to-amorph.us transition to a h.t dense fused silica *** exceeds 20%and th. matrix temperature rises to more th.n 2,000 K in th. first *** structural state relaxes in h.ndreds of *** dispersion and time design of th. optical beam to picosecond durations increases th. spatial confinement and triggers an extreme nanostructuring process based on nanocavitation th.t occurs with.n th. amorph.zing material,wh.re th. low-viscosity ph.se lowers th. mech.nical requirements for th. *** feature scales of less th.n a tenth.of th. optical wavelength.are obtained in th. *** allows for structural and morph.logical nanoscale material features under 3D confinement th.t can engineer optical materials.

关键词： Quartz h.ndreds qualitative