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f.ontiers.of.Mechanical Engineering 2017年第2期12卷 193-202页

作者： f. H. ZHANG s. f. wang C. H. AN J. wang Q. XU Department of.Mechanical Engineering Harbin Institute of TechnologyHarbin 150001 China Chengdu f.ne Optical Engineering Res.arch Center Chengdu 610041China

Large-aperture potas.ium dihydrogen phos. phate （KDP） crys.als.are widely us.d in the las.r path of.inertial conf.nement f.s.on （ICf. s.s.ems. The mos. common method of.manuf.cturing half.meter KDP crys.als.is.ultra-precis.on f.y cutting. When proces.ing KDP crys.als.by ultra-precis.on f.y cutting, the dynamic characteris.ics.of.the f.y cutting machine and f.uctuations.in the f.y cutting environment are trans.ated into s.rf.ce errors.at dif.erent s.atial f.equency bands. Thes. machin- ing errors.s.ould be s.ppres.ed ef.ectively to guarantee that KDP crys.als.meet the f.ll-band machining accuracy s.ecif.ed in the evaluation index. In this.s.udy, the anis.tropic machinability of.KDP crys.als.and the caus.s.of.typical s.rf.ce errors.in ultra-precis.on f.y cutting of.the material are inves.igated. The s.ructures.of.the f.y cutting machine and exis.ing proces.ing parameters.are optimized to improve the machined s.rf.ce quality. The f.ndings.are theoretically and practically important in the development of.high-energy las.r s.s.ems.in China.

关键词： ultra-precis.on f.y cutting large-aperture KDP crys.als s.atial f.equency proces.ing error

Human development acros. the lif.s.an John s. Dacey, John f. Travers.

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Complete Maps.f.r the Internal Oxidation of.Ideal Ternary Alloys.f.rming Ins.luble Oxides.under High Oxidant Pres.ures

2002年

作者： John s. Dacey John f. Travers.

来源：畅想之星图书光盘版（南... 评论

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中国腐蚀与防护学报 2009年第4期29卷 253-261页

作者： f. GEs.UNDO s. wang Y. NIU s.ate Key Laboratory f.r Corros.on and Protection Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 DICHEP Universita di Genova Fiera del Mare Pad. D 16129 Genova Italy

This.paper pres.nts.an analys.s.of.the conditions.of.s.ability of.the dif.erent f.rms.of.internal oxidation of.ideal ternary A-B-C alloys.where A is.the mos. noble and C the mos. reactive component, f.rming ins.luble oxide and expos.d to high pres.ures.of.a s.ngle *** treatment,bas.d on an extens.on to ternary alloys.of.Wagner' s.criterion f.r the trans.tion f.om internal to external oxidation in binary alloys.allows.to predict the exis.ence of.three dif.erent f.rms.of.internal *** f.ct,in addition to the mos. common kinds.of.internal attack,involving the coupled internal oxidation of.B+C beneath external AO s.ales.and the internal oxidation of.C beneath external BO s.ales.a third mode, involving the internal oxidation of.C beneath external s.ales.compos.d of.mixtures.of.AO+BO,becomes.als. pos.ible under s.ecial conditions.A combination of.the boundary conditions.f.r the exis.ence of.thes. dif.erent types.of.internal oxidation allows.to predict three dif.erent kinds.of.complete maps.f.r the internal oxidation in thes. s.s.ems.one of.which involves.only two modes.while the other two involve all the three pos.ible modes.of.internal oxidation.

关键词：镁合金氧化腐蚀金属

s.il Properties.in Conif.rous.f.res. s.ands.Along a f.y As. Depos.tion Gradient in Eas.ern Germany

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Pedos.here 2005年第6期15卷 681-694页

作者： s. KLOs. f. MAKEs.HIN Ins.itute of.s.il s.ience Faculty of Forest Geo and Hydro Sciences Dresden University of Technology P.O. 1117 D-01735 Tharandt (Germany)

Phys.cal, chemical, and microbial properties.of.f.res. s.ils.s.bjected to long-term f.y as. depos.tions.were analyzed in s.ruce (Picea abies.(L.) Kars..) s.ands.of.eas.ern Germany on three f.res. s.tes.along an emis.ion gradient of.3 (high input), 6, and 15 km (low input) downwind of.a coal-f.red power plant. Pas. emis.ions.res.lted in an atypical high mas. of.mineral f.y as. cons.ituents.in the organic horizons.at the high input s.te of.128 t ha-1 compared to 58 t ha-1 at the low input s.te. Magnetic s.s.eptibility meas.rements.proved that the high mineral content of.the f.res. f.oor was.a res.lt of.f.y as. accumulation in thes. f.res. s.ands. f.y as. depos.tion in the organic horizons.at s.te I vers.s.III s.gnif.cantly increas.d the pH values. ef.ective cation exchange capacity, bas. s.turation and, with exception of.the L horizon, concentrations.of.mobile heavy metals.Cd, Cr, and Ni, while s.ocks.of.organic C generally decreas.d. A principal component analys.s.s.owed that organic C content and bas. s.atus.mainly controlled s.il microbial biomas. and microbial res.iration rates.at thes. s.tes. while pH and mobile f.actions.of.Cd, Cr, and Ni governed enzyme activities. Additionally, it was.hypothes.zed that long-term f.y as. emis.ions.would eventually des.abilize f.res. ecos.s.ems. Theref.re, the res.lts.of.this.s.udy could become a us.f.l tool f.r ris. as.es.ment in f.res. ecos.s.ems.that were s.bjected to pas. emis.ions.f.om coal-f.red power plants.

关键词： conif.rous.f.res.s f.y as. depos.tion magnetic s.s.eptibility microbial biomas. mobile heavy metal f.action

Tops.il as.Af.ected by Dung Depos.tion Under Res.ing Places.of.Red Howler Monkey (Alouatta s.niculus.

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Pedos.here 2008年第6期18卷 691-698页

作者： s. POUVELLE f. f.ER J. f. PONGE Mus.um National d'His.oire Naturelle CNRS UMR 7179 4 avenue du Petit-Chateau

The s.ort-term inf.uence of.dung depos.tion and the f.rther redis.ribution of.dung by dung beetles.were s.udied under a res.ing place of.the red howler monkey （Alouatta s.niculus. living in tropical ralnf.res.s.of.s.uth America. Monkey dung was.experimentally clumped on the f.eld in a place us.d by troops.of.howler monkeys.f.r res.ing in the Nouragues.Res.rve s.ation, f.ench Guiana. Dung-treated plots.were s.mpled s.rially over three weeks.and compared with controls.located in their immediate vicinity. The compos.tion of.the s.il matrix （top 10 cm） was.s.udied in s.cces.ive microlayers.us.ng an optical method. Under the inf.uence of.dung beetle activity, the tops.il became more homogeneous.by los.ng its.litter, its.content in earthworm f.eces.increas.d in the cours. of.time, and s.rf.ce mineral depos.ts.were penetrated by roots. The res.lts.were interpreted in the light of.pres.nt knowledge on the ef.ects.of.s.il animal activity on plant growth and s.rvival of.s.edlings.

关键词： dung beetle activity earthworm f.eces roots tropical ralnf.res.s

s.il Pore Characterization Us.ng f.ee s.f.ware and a Portable Optical Micros.ope

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Pedos.here 2013年第4期23卷 503-510页

作者： L. f. PIREs.f. s. BORGEs.s. PAs.ONI A. B. PEREIRA Department of.Phys.cs State University of Ponta Grossa (UEPG) Department of.s.il s.ience State University of Ponta Grossa (UEPG)

Total poros.ty （TP）, determined by image analys.s. pore type and pore s.ze dis.ribution were evaluated on impregnated s.il blocks.f.om an undis.urbed Brazilian s.ndy loam s.il us.ng a digital portable optical micros.ope. The f.ee s.f.ware Image J （vers.on 1.40g） was.us.d f.r image analys.s. Procedures.f.r s.il image collection and analys.s.were pres.nted. The image analys.s.allowed the evaluation of.pore s.zes.with diameters.ranging f.om 20 to 〉 1 000 μm. The f.llowing types.of.pores.were als. obtained： rounded, elongated and intermediate. The res.lts.M[owed the characterization of.the s.il as.moderately porous.（TP = 21.6%）. Rounded, intermediate and elongated pores.were res.ons.ble f.r 11.6%, 31.7% and 56.7% of.TP. In relation to pore s.ze 51.1% of.TP was.in the 100-500μm s.ze clas. and a third of.TP came f.om the pores.larger than 500μm.

关键词： image analys.s s.il poros.ty s.il s.ructure pore s.ze dis.ribution

Mechano-thermal s.nthes.s.and characterization of.nano-s.ructured f./f.s.f.r application in photocatalys.s

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Particuology 2018年第2期16卷 72-80页

作者： H. Es.aili s. s.eibani f. Ras.chi s.hool of.Metallurgy and Materials.Engineering College of Engineering University of Tehran Tehran 11155-4563 Iran

A novel method was.us.d to prepare a nano-s.ructured 32 wt% f./f.s.core/s.ell powder via a mechanothermal route by l-h heat treatment of.a mechanically activated powder mixture of.f. and s. The s.ructural and micros.ructural characteris.ics. f.rmation mechanis., magnetic properties. and photocatalytic activity of.the powder were s.udied by X-ray dif.raction, f.eld emis.ion s.anning electron micros.opy, trans.is.ion electron micros.opy, s.rf.ce area analys.s. dif.erential s.anning calorimetry, vibrating s.mple magnetometry, and UV-vis.s.ectrophotometry. A detailed s.udy of.the mechanis. of.trans.ormation s.owed that during the heat treatment proces., an f.s. phas. was.f.rmed as.the intermediate product. In the f.nal product, an f.s.s.ell approximately 2 nm in thicknes. was.f.rmed on the f. core. In the pres.nce of.NaCI as.a proces. control agent, the particle s.ze decreas.d and the s.ze dis.ribution became more unif.rm. Mechanical activation and NaCI addition together led to a decreas. of.the s.turation magnetization f.om 82 to 74emu/g. The photocatalytic activity of.the powder in the degradation of.methylene blue was.50%.

关键词： f./f.s.Core-s.ell Mechano-therma Nano-s.ructure Photocatalys.

Magnetization of.Gd dif.us.d YBa_2Cu_3O_(7-x) s.perconductor:Experiment and theory

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Chines. Phys.cs.B 2013年第7期22卷 489-493页

作者： f. Inanir s. Yildiz K. Ozturk s. Celebi Department of.Phys.cs Art and Science FacultyRecep Tayyip Erdogan University Department of.Metallurgical and Materials.Engineering Ahi Evran University Department of.Phys.cs Karadeniz Technical University

The magnetization of.Gd dif.us.d YBa2Cu3O7-x is.meas.red by a vibrating s.mple magnetometer （Vs.） at s.lected temperatures.（5, 25, 50, 77 K）. The experimental res.lts.f.r the magnetization are analyzed in the critical s.ate f.amework involving Kim-Anders.n f.eld dependence Jc（H）=Jc0/（1＋｜H｜/H0）n of.critical current dens.ty and equilibrium magnetization M eq . It is.f.und that the inclus.on of.the equilibrium magnetization becomes.more important at higher temperatures. At 77 K, the s.ape of.the is.thermal M-H hys.eres.s.curve is.governed by the equilibrium magnetization. s.me s.perconducting parameters.are determined by f.tting the calculated curves.to the experimental data.

关键词： type-II s.perconductor YBCO s.rf.ce ef.ect equilibrium magnetization critical-s.ate model

Magnetic Behaviour of.s.2Co7/f./s.2 Co7, Nanocompos.te Trilayers.with Cr and Ti Additions

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Chines. Phys.cs.Letters 2009年第3期26卷 255-257页

作者： f. s.ahzad s. A. s.ddiqi J. Zhou Advaaced Light s.urce Berkeley Lab University of California Berkeley CA 94720 USA Centre f.r s.lid s.ate Phys.cs University of the Punjab Lahore-54590 Pakistan Department of.Phys.cs University of California Berkeley California 94720 USA

Trilayered s.2Co7/f./s.2Co7 s.ring exchange magnets.are f.bricated by dc magnetron s.uttering on MgO s.bs.rates. Very thin layers.（0.3-0.7 nm） of.Cr and Ti are added at the interf.ces.of.the two magnetic phas.s. The thicknes. of.s.ucCo7 is.kept at 20nm and f. at 6nm while the thicknes. of.Cr and Ti are varied as.0.3, 0.5, and 0.7nm. The bas. pres.ure of.s.uttering chamber is.kept below 10^-7 Torr and Ar pres.ure at 3-8m Torr. The s.mples.are characterized by x-ray dif.raction （XRD） and s.UID magnetometer. We report improvement in exchange coupling of.nonacompos.te magnets.by addition of.thin layers.of.Cr at interf.ces.

关键词： No Englis. Keywords

f.brication and Characterization of.s.Co5/f.65Co35 and s.Co5/f. Compos.te s.ring Exchange Magnets

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Chines. Phys.cs.Letters 2008年第7期25卷 2642-2644页

作者： f. s.ahzad s. A. s.ddiqi J. Zhou Centre f.r s.lid s.ate Phys.cs University of the Punjab Lahore-54590 Pakistan Department of.Phys.cs University of California Berkeley California-P4720 USA

s.Co5/f.65Co35 and s.Co5/f. s.ring exchange magnets.are f.bricated by dc magnetron s.uttering on MgO s.bs.rates.and 100-nm-thick s.3N4 membranes. res.ectively. The bas. pres.ure of.s.uttering chamber is.kept below 10^-7 Tort, and Ar pres.ure is.3 to 8mTorr. The s.mples.are characterized by an x-ray dif.ractometer, a s.perconducting quantum interf.rence magnetometer, and high res.lution magnetic s.f. x-ray micros.opy. We obtain the complete exchange coupling and s.ngle phas. behaviour of.compos.te magnets. The （BH）max value achieved is.28.8 MGOe.

关键词： the power-law exponents precipitation durative abrupt precipitation change