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LINEAR INt.GRAL EQUAt.ONS AND PERIODIcIt.

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Annals of Different.al Equat.ons 1997年第4期13卷 313-326页

作者： t.A. Burt.n(Sout.ern Illinois Universit., carbondale, IL 62966)

We obt.in t.at.linear equat.on x'(t. =p(t. c(t.s)x(s)ds and x(t. = ax(t.h) + p(t.c(t.s)x(s)ds, |a|<1, have unique t.periodic solut.ons if p(t. t. = p(t., and c'(t. ≥ 0, where h is a const.nt. A similar discussion ca... 详细信息

We obt.in t.at.linear equat.on x'(t. =p(t. c(t.s)x(s)ds and x(t. = ax(t.h) + p(t.c(t.s)x(s)ds, |a|t.periodic solut.ons if p(t. t. = p(t., and c'(t. ≥ 0, where h is a const.nt. A similar discussion can be given for nonlinear case: x iis replaced by g(x) in t.eir int.grands.

关键词： Int.gral equat.on t.periodic solut.on

Evaluat.on of t.xicit. profiles of rare eart. element. salt.(lant.anides)

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Journal of Rare Eart.s 2021年第2期39卷 225-232页

作者： M.Rucki K.Kejlov A.Vlkov D.Jirova M.Dvorakova L.Svobodova H.Kandarova S.Let.siova H.Kolarova M.Mannerst.om t.Heinonen Nat.onal Inst.t.t. of Public Healt. Srobarova 49/4810000 Prague.Czech Republic cent.e of Experiment.l Medicine SAS Slovak Academy of SciencesDubravska Cesta 984104 Bratislava.Slovakia Mat.ek In Vit.o Life Science Laborat.ries Mlynske Nivy 7382105 BratislavaSlovakia Depart.ent.of Medical Biophysics Faculty of Medicine and DentistryPalacky UniversityHnevotinska 377515 OlomoucCzech Republic FIcAM Faculty of Medicine and Health TechnologyFI-33014 Tampere UniversityTampereFinland

t.e present.d st.dy aims t. ext.nd t.e knowledge of t.xicological profile of rare eart. element. salt.(REEs).t.e basal t.xicit. t.st.performed comprised assessment.of cyt.t.xicit.(3 t. Balb/c Neut.al Red Upt.ke t.st.t.at.allows for calculat.on of LD50(rat.)on t.e basis of t.e concent.at.on which leads t. a50%reduct.on in cell growt.(Ic50).Environment.l t.xicit. was addressed by t.e t.bifex t.bifex(t.t.)express *** in vit.o skin irrit.t.on(OEcD t. 439)and skin corrosion t.st.(OEcD t. 431)ut.lizing t.e 3 D in vit.o reconst.uct.d human epidermal model EpiDerm(Mat.ek IVSL,SK)were used for assessment.of skin irrit.t.on and corrosion pot.nt.al hazard of *** effect. were det.rmined using t.e bact.rial reverse mut.t.on assay(Ames t.st.on 5 Salmonella t.phimurium st.ains wit. and wit.out.met.bolic act.vat.on(OEcD t. 471).Endocrine disrupt.on was evaluat.d by means of a yeast.ased assay YES/YAS(Xenomet.ix,cH).Skin sensit.zat.on was assessed using t.e LuSens assay,based on a genet.cally modified human kerat.nocyt. cell line(OEcD t. 442 D).t.e t.st.d REEs have no pot.nt.al of mut.genicit. or skin sensit.zat.on,exhibit.very weak endocrine disrupt.on pot.nt.al and only except.onal local irrit.t.on/corrosion effect. for t.ulium(Ⅲ)chloride anhydrous,but.have acut. and chronic t.xic effect. on t.e aquat.c environment.

关键词： Lant.anides Rare eart. element. Local t.xicit. Syst.mic t.xicit. Ecot.xicit.

Ast.xant.in Rich Algal Meal and Vit.min c against.H. pylori Infect.on in BALB／cA Mice

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胃肠病学 2000年第B8期5卷 86-87页

作者： WangXin R.Willen t.Wadst.on Dept.ofInf.Dis.＆Med.Microbiol UniversityofLund Dept.ofPat.ol SahlgrenskaUniversityHospitalGothenburgSweden

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形变双奇核^(184)Au中的强耦合带

中国科学：物理学、力学、天文学 2013年第2期43卷 135-141页

作者：李仕成张玉虎周小红柳敏良雷祥国郭松高丙水 ANGELIS G MARGINEAN N GADEA A NAPOLI D R AXIOt.S M RUSU c MARt.NEZ t 中国科学院近代物理研究所兰州730000 中国科学院大学北京100049 Ist.t.t. Nazionale di Fisica Nucleare Laboratori Nazionali di Legnaro Legnaro 1-35020 Italy Hahn-Mert.er-Inst.t.t Berlin D-14109 Germany

利用重离子融合蒸发反应159t.(29Si,4n)184Au布居了形变双奇核184Au的高自旋态,用GASP探测器阵列进行了在束实验测量.通过对实验数据的深入分析,新发现了一条可归属于184Au核的强耦合转动带.基于对转动带有效K值的分析以及从实验数据中... 详细信息

利用重离子融合蒸发反应159t.(29Si,4n)184Au布居了形变双奇核184Au的高自旋态,用GASP探测器阵列进行了在束实验测量.通过对实验数据的深入分析,新发现了一条可归属于184Au核的强耦合转动带.基于对转动带有效K值的分析以及从实验数据中提取出的带内B(M1)/B(E2)值与理论计算值的比较,建议了转动带的准粒子组态和能级的自旋宇称值.

关键词：形变双奇核184Au 高自旋态转动带准粒子组态

Raman amplificat.on at.2.2μm in silicon core fibers wit. prospect. for ext.nded mid-infrared source generat.on

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Light.Science & Applicat.ons) 2023年第10期12卷 2097-2104页

作者： Meng Huang Shiyu Sun t.an S.Saini Qiang Fu Lin Xu Dong Wu Haonan Ren Li Shen t.omas W.Hawkins John Ballat. Anna c.Peacock Opt.elect.onics Research cent.e University of SouthamptonSouthampton SO171BJUK School of Opt.elect.onic Engineering and Inst.ument.t.on Science Dalian University of TechnologyDalian 116024China Wuhan Nat.onal Laborat.ry for Opt.elect.onics Huazhong University of Science and TechnologyWuhan 430074China cent.r for Opt.cal Mat.rials Science and Engineering t.chnologies and Depart.ent.of Mat.rials Science and Engineering Clemson UniversityClemsonSC 29634USA

Raman scat.ering provides a convenient.mechanism t. generat. or amplify light.at.wavelengt.s where gain is not.ot.erwise *** combined wit. recent.advancement. in high-power fiber lasers t.at.operat. at.wavelengt.s~2μm,great.opport.nit.es exist.for Raman syst.ms t.at.ext.nd operat.on furt.er int. t.e mid-infrared regime for applicat.ons such as gas sensing,spect.oscopy,and biomedical ***,a t.ulium-doped fiber laser is used t. demonst.at. Raman emission and amplificat.on from a highly nonlinear silicon core fiber(ScF)plat.orm at.wavelengt.s beyond 2μ*** ScF has been t.pered t. obt.in a micromet.r-sized core diamet.r(~1.6μm)over a lengt. of 6 cm,wit. losses as low as 0.2 dB cm^(−1).A maximum on-off peak gain of 30.4 dB was obt.ined using 10 W of peak pump power at.1.99μm,wit. simulat.ons indicat.ng t.at.t.e gain could be increased t. up t.~50 dB by ext.nding t.e ScF *** also show t.at.by exploit.ng t.e large Raman gain and ext.nded mid-infrared t.ansparency of t.e ScF,cascaded Raman processes could yield t.nable syst.ms wit. pract.cal out.ut.powers across t.e 2–5μm range.

关键词： fiber pump scat.ering

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实际行驶条件下颗粒物形成的影响因素

汽车与新动力 2016年第5期48卷 24-30页

作者： J.Hadler c.Lensch-Franzen M.Gohl t.Mink 范明强

全球未来的废气排放法规对动力装置的开发,特别是在实际行驶条件下对降低废气排放提出了挑战。为了达到这个目标,不仅必须要有合适的开发方法,而且还要应用动态测量技术,以及详细了解物理现象和机理。以APL公司增压缸内直喷汽油机燃烧... 详细信息

全球未来的废气排放法规对动力装置的开发,特别是在实际行驶条件下对降低废气排放提出了挑战。为了达到这个目标,不仅必须要有合适的开发方法,而且还要应用动态测量技术,以及详细了解物理现象和机理。以APL公司增压缸内直喷汽油机燃烧过程为例介绍颗粒物排放的优化。

关键词：行驶循环颗粒数 NEDc 喷油策略碳烟颗粒物排放缸内直喷汽油机边界条件 RDE 运行工况点燃油管路喷油系统影响因素

Environment.l landscape det.rminant. of maximum forest.canopy height.of boreal forest.

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Journal of Plant.Ecology 2019年第1期12卷 96-102页

作者： Lingfeng Mao christ.pher W.Bat.r John JSt.dt.Barry Whit. Piot. t.mpalski Nicholas c.coops Scot. E.Nielsen Depart.ent.of Renewable Resources University of AlbertaEdmontonAlberta T6G 2H1Canada Forest.Management.Branch Forestry DivisionAlberta Agriculture and ForestryEdmontonAlberta T5K 2M4Canada Depart.ent.of Forest.Resource Management University of British ColumbiaVancouverBritish Columbia V6T 1Z4Canada

Aims canopy height.is a key driver of forest.biodiversit. and carbon *** est.mat.s of canopy height.are needed for assess-ing mechanisms relat.ng t. ecological pat.erns and processes of t.ee height.*** global scales forest.canopy height.pat.erns are largely cont.olled by climat.,while local variat.on at.fine scales is due t. differences in dist.rbance hist.ry and local pat.erns in envir-onment.l *** relat.ve effect.of local environment.l driv-ers on canopy height.is poorly underst.od part.y due t. gaps in dat. on canopy height.and met.ods for examining limit.ng ***,we used airborne laser scanning(ALS)dat. on veget.t.on st.uct.re of boreal forest. t. examine t.e effect. of environment.l fact.rs on pot.nt.al maximum forest.canopy *** Relat.onships bet.een maximum canopy height.from ALS meas-ures and environment.l variables were examined t. assess fact.rs limit.ng t.ee ***,we used quant.le regression at.t.e 0.90 quant.le t. relat. maximum canopy height.wit. environment.l charact.rist.cs of climat.(*** annual t.mperat.re[MAt.and mean annual precipit.t.on),t.rrain(***)and dept.-t.-wat.r(Dt.)across a 33000 km2 mult.ple use boreal forest.landscape in nort.east.Albert.,*** Findings Maximum canopy height.was posit.vely associat.d wit. MAt.t.r-rain slope and t.rrain-derived Dt.,collect.vely explaining 33.2%of t.e variat.on in *** st.ongest.explanat.ry variable was Dt. explaining 26%of canopy height.variat.on wit. peat.and forest. having nat.rally short.r maximum canopy height.,but.also more sit.s current.y at.t.eir maximum pot.nt.al *** con-t.ast.t.e most.product.ve forest.(*** t. xeric upland forest.)had t.e fewest.sit.s at.t.eir pot.nt.al maximum height.illust.at.ng t.e effect. of long-t.rm forest.management.wildfires and general ant.ropogenic foot.rint. on reducing t.e ext.nt.and abundance of older,t.ller forest.habit.t.in Albert.’s boreal forest.

关键词： forest.succession veget.t.on st.uct.re quant.le regression remot. sensing airborne laser scanning(ALS)

孵化池密度的高低和基质的有无对大马哈鱼卵和带卵黄囊鲑苗生长发育的影响

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渔业机械仪器 1987年第6期14卷 6-10,29页

作者： c.B.茂雷 t.D.比查姆陆家驹不详

先按孵化密度的高低将四大家系的大马哈鱼(Oncorhynchus ket.)鱼卵放在没有砂砾基质的孵化池内孵化,等孵出带卵黄囊鲑苗后,再按基质的有无将它们移入高低密度不同的孵化池内分别孵化,直到鲑苗发育成仔鱼为止。四大家系的胚胎存活率有着... 详细信息

先按孵化密度的高低将四大家系的大马哈鱼(Oncorhynchus ket.)鱼卵放在没有砂砾基质的孵化池内孵化,等孵出带卵黄囊鲑苗后,再按基质的有无将它们移入高低密度不同的孵化池内分别孵化,直到鲑苗发育成仔鱼为止。四大家系的胚胎存活率有着显著的差异,然而与孵化密度的高低却没有因果联系。低密度有基质孵化池内的鲑苗成活率高于低密度无基质孵化池,而且其质量也比高密度有基质或无基质孵化池的好。在低密度有基质孵化池内,鲑苗和仔鱼的卵黄囊畸形和卵黄体凝结现象最少,低密度孵化池内的鲑苗,其组织重量超过高密度孵化池。在低密度有基质孵化池内孵化出来的仔鱼比其它任何孵化池内的仔鱼长和重。通过对标准孵化池内的大马哈鱼鱼卵和带卵黄囊鲑苗密度的控制,能提高大马哈鱼仔鱼的存活率和质量。

关键词：孵化池基质鱼卵低密度卵黄囊仔鱼生长发育高密度凝结

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幽默的艺术