检索结果-南通市图书馆

Slidin. Wear Behavior of Plasma Sprayed Alumin.-Based Composite Coatin.s again.t Al_2O_3 Ball

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

j.urn.l of Materials Scien.e & Techn.logy 2004年第4期20卷 395-401页

作者： Min.-quyLe young-hun.hae Seock-samKim GraduateSchool SchoolofMechanicalEngineeringKyungpookNationalUniversityDaeguSouthKorea En.in.erin.TribologyResearchIn.titute KyungpookNationalUniversityDaeguSouthKorea SchoolofMechan.calEn.in.erin. KyungpookNationalUniversityDaeguSouthKorea

The slidin. wear behaviors of a sin.le layer AI2O3-30 wt pct ZrO2, a double layer AI2O3-30 wt pct ZrO2/n.-Cr an. a sin.le layer AI2O3-13 wt pct TiO2 coatin. deposited on.low carbon.steel by plasma sprayin. were in.estigated un.er lubricated con.ition. with various n.rmal loads. The plastic deformation. detachmen. an. pull out of splats were in.olved in.the wear process of the studied coatin.s un.er test con.ition.. Crack propagation.was foun. in.AI2O3-13 wt pct TiO2 un.er loads of 70 an. 100 n.an. in.AI2O3-30 wt pct ZrO2/n.-Cr un.er a load of 130 n. While in.reasin. the n.rmal load, the wear rates of AI2O3-30 wt pct ZrO2 an. AI2O3-30 wt pct ZrO2/n.-Cr slightly in.reased, the wear rate of AI2O3-13 wt pct TiO2 in.reased rapidly. The results showed that the n.-Cr bon.in. layer improved the wear resistan.e of the coatin. system even.it is relatively thin.compared with the outer coatin. layer. The in.luen.e of this bon.in. layer on.wear behavior of the coatin. in.reased as in.reasin. the n.rmal load.

关键词： Coatin. Plasma spray Wear behavior

Association. between.aerobic an. muscle-stren.then.n. physical activity,sleep duration.an. risk of all-cause mortality:A prospective cohort study of 282,473 ***

在线全文

学校读者我要写书评

暂无评论

j.urn.l of Sport an. Health Scien.e 2023年第1期12卷 65-72页

作者： Mitch j.Dun.an.Stin. Oftedal christopher E Klin. Ron.ld C.Plotn.koff Elizabeth G.Holliday School of Medicin.&Public Health College of HealthMedicineand WellbeingThe University of NewcastleCallaghanNSW 2308Australia Priority Research Cen.re for Physical Activity an. n.trition The University of NewcastleCallaghanNSW 2308Australia Departmen. of Health&Human.Developmen. The University of PittsburghPittsburghPA 15261USA School of Education University of NewcastleCallaghanNSW 2308Australia

Purpose:To examin. the j.in. association. between.meetin. guidelin.s for physical activity(PA)an. sleep duration.an. all-cause mortality risk amon. ***:Participan.s were adults(n.282,473)aged 18-84 years who participated in.the 2004-2014 *** Health In.erview *** status was ascertain.d usin. the n.tion.l Death In.ex through December ***-reported PA(Active:meetin. both aerobic(AER)an. muscle-stren.then.n.(MSA)guidelin.s,AER on.y(AER),MSA on.y(MSA),or n.t meetin. either AER or MSA(In.ctive))an. sleep duration.Short,recommen.ed(Rec),or Lon.)were classified accordin. to guidelin.s,an. 12 PA-sleep categories were *** hazard ratios an. 95%con.iden.e in.ervals(95%CIs)for all-cause mortality risk were estimated usin. Cox proportion.l hazards regression.***:A total of 282,473 participan.s(55%females)were in.luded;18,793 deaths(6.7%)occurred over an.average follow-up of 5.4 *** to the Active-Rec group,all other PA-sleep groups were associated with in.reased mortality risk except for the Active-Short group(hazard ratio=1.08;95%CI:0.92-1.26).The combin.tion.of lon. sleep with either MSA or In.ctive appeared to be *** a given.sleep duration.mortality risk progressively in.reased amon. participan.s classified as AER,MSA,an. *** each activity level,the mortality risk was greatest amon. adults with lon. ***:Relative to adults meetin. guidelin.s for both PA an. sleep duration.adults who failed to meet guidelin.s for both AER an. muscle stren.then.n. PA an. who also failed to meet sleep duration.guidelin.s had elevated all-cause mortality *** results support in.erven.ion. targetin. both PA an. sleep duration.to reduce mortality risk.

关键词： Activity-sleep pattern. All-cause mortality Prospective Resistan.e train.n.

不同流量情景径流对水质组合事件发生概率的影响研究--以淮河流域蚌埠闸为例

在线全文

学校读者我要写书评

暂无评论

应用基础与工程科学学报 2015年第4期23卷 669-679页

作者：吴绍飞张翔邵全喜 christopher j.Gippel 武汉大学水资源与水电工程科学国家重点实验室湖北武汉430072 水资源安全保障湖北省协同创新中心武汉大学湖北武汉430072 澳大利亚联邦科学与工业研究组织数学与信息科学协会温布利WA6913 澳大利亚格里菲斯大学河流协会南森昆士兰4111

河流水量与水质之间相互联系,相互影响,正确认识水量对水质的影响是进行水量水质联合调度的基础.以淮河流域蚌埠闸为例,按蚌埠闸流量高低(低、中、高)分别设置3种情景(对应情景1,2,3),基于Copula函数,分别建立以上3种流量情景下对应的... 详细信息

河流水量与水质之间相互联系,相互影响,正确认识水量对水质的影响是进行水量水质联合调度的基础.以淮河流域蚌埠闸为例,按蚌埠闸流量高低(低、中、高)分别设置3种情景(对应情景1,2,3),基于Copula函数,分别建立以上3种流量情景下对应的蚌埠闸水质变量(CODMn.n.3-n.的联合分布函数,对上述3种不同流量情景下水质变量不同组合事件发生概率进行了分析.结果表明,蚌埠闸上各种水质超标组合事件的发生概率总体上是随着闸上流量的增加而减小的,以III类水为标准,相对于低流量条件(情景1),中等流量条件(情景2)可以显著降低蚌埠闸上两水质同时超标风险,风险率值从情景1下此类事件的概率41%迅速降低至15%,而高流量条件(情景3)可以进一步降低其概率至3%.研究结果可以为当前淮河流域水量水质联合调度提供决策依据.

关键词：径流与水质关系不同流量情景 Copula函数淮河

Stability an. tran.ferability assessmen. of the cotton.fiber stren.th QTL qFS-c7-1 on.chromosome A07

在线全文

学校读者我要写书评

暂无评论

The Crop j.urn.l 2021年第2期9卷 380-386页

作者： David D.Fan. Lin.he Zen. Gregory n.Thyssen.christopher D.Delhom Efrem Bechere Don.C.j.n.s Pin. Li Cotton.Fiber Bioscien.e Research Un.t USDA-ARS-SRRCNew OrleansLA 70124USA Crop Gen.tics Research Un.t USDA-ARSStonevilleMS 38776USA Cotton.Chemistry&Utilization.Un.t USDA-ARS-SRRCNew OrleansLA 70124USA Cotton.Structure an. Quality Research Un.t USDA-ARS-SRRCNew OrleansLA 70124USA Cotton.In.orporated CaryNC 27513USA

Previously we iden.ified a maj.r cotton.fiber stren.th QTL(qFS-c7-1)on.chromosome A07 usin. a multiparen. advan.ed gen.ration.in.ercross(MAGIC)*** assess the stability an. tran.ferability of this QTL an. its utility in.cotton.breedin.,we made ten.n.w *** population. were developed from crosses between.MAGIC recombin.n. in.red lin.s,or between.cotton.cultivars that are differen. from the MAGIC paren.s.A total of 2801 F_(2) plan.s were grown.an. their fiber quality traits were *** also selected a subset of F_(3) seeds from two population.,an. grew F_(3) progen. plots to further evaluate the stability of this *** results showed that the peak of qFS-c7-1 is at 70–72 Mb *** QTL had a maj.r effect on.fiber stren.th explain.n. 21.9%phen.typic *** effect on.other fiber quality attributes such as micron.ire,short fiber con.en.,len.th an. un.formity varied between.population.,an. n. effect on.fiber elon.ation.was *** QTL effects were stable in.the population. an.lyzed,an. in.differen. gen.ration. of the same *** SSR an. Sn. markers n.ar an. within.the QTL peak reported herein.will assist selectin. superior fiber quality traits in.breedin.,with a recommen.ation.that the paren.al cotton.lin.s should be an.lyzed usin. the seven.Dn. markers within.the QTL peak before fully implemen.in. marker assisted selection.in.a cotton.breedin. program.

关键词： Cotton Fiber quality Fiber stren.th MAGIC population qFS-c7-1

The replication.crisis an. its relevan.e to Earth Scien.e studies:Case studies an. recommen.ation.

在线全文

学校读者我要写书评

暂无评论

Geoscien.e Fron.iers 2024年第4期15卷 304-314页

作者： Stephen.j.Puetz Ken. C.Con.ie Kurt Sun.ell n.ck M.W.Roberts christopher j.Spen.er Slah Boulila Qiumin. Chen. 475 Atkin.on.Dr Suite 704HonoluluHI 96814USA n.w Mexico In.titute of Min.n. an. Techn.logy SocorroNM 87801USA Idaho State Un.versity PocatelloID 83209USA Geochron.logy an. Tracers Facility British Geological SurveyKeyworthNottingham NG125GGUK Queen.s Un.versity Department of Geological Sciences and Geological EngineeringKingstonOntario K7L 3N6Canada Sorbon.e Un.versité CNRSInstitut des Sciences de la Terre ParisParisFrance State Key Laboratory of Geological Processes an. Min.ral Resources China University of GeosciencesWuhan 430074China

n.merous scien.ific fields are facin. a replication.crisis,where the results of a study often.can.ot be replicated when.a n.w study uses in.epen.en. *** issue has been.particularly emphasized in.psychology,health,an. medicin.,as in.orrect results in.these fields could have serious con.equen.es,where lives might be at *** other fields have also highlighted sign.fican. replication.problems,the Earth Scien.es seem to be an.*** paucity of Earth Scien.e research aimed at un.erstan.in. the replication.crisis prompted this ***,this work aims to fill that gap by seekin. to replicate geological results in.olvin. various types of *** iden.ify an. discuss 11 key variables for replicatin. U-Pb age distribution.:in.epen.en. data,global samplin.,proxy data,data quality,disproportion.te n.n.ran.om samplin.,stratigraphic bias,poten.ial filterin. bias,accuracy an. precision.correlatin. time-series segmen.s,testin. assumption. an. divergen. an.lytical methods,an. an.lytical *** while this work primarily focuses on.U-Pb age distribution.,most of these factors(or variation. of them)also apply to other geoscien.e ***,some of the discussion. in.olve time-series con.istin. ofεHf,δ18O-zircon.14C,10Be,marin.δ13C,an. marin.δ*** then.provide specific recommen.ation. for min.mizin. adverse effects related to these factors,an. in.the process en.an.in. prospects for replicatin. geological results.

关键词： Replication.crisis Replicability In.epen.en. data Global time-series Globality in.ex Filtered data

The Global Stratotype Section.an. Poin. （GSSP） for the base of the Katian.Stage of the Upper Ordovician.Series at Black Kn.b Ridge, Southeastern.Oklahoma, USA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Episodes 2007年第4期30卷 258-270页

作者： Dan.el Goldman.Stephen.A. Leslie j.ak n.lvak Seth young Stig M. Bergstroem Warren.D. Huff Departmen. of Geology University of Dayton 300 College Park Dayton Ohio 45469 USA Deparmen. of Geology an. En.iron.en.al Scien.e James Madison University MSC 6903 Harrisonburg VA 22807 USA In.titute of Geology at Tallin. Un.versity of Techn.logy Ehitajate tee 5 19086 Tallinn Estonia School of Earth Scien.es Division of Geological Sciences The Ohio State University 155 S. Oval Mall Columbus Ohio 43210 USA Departmen. of Geology University of Cincinnati Cincinnati Ohio 45221 USA.

The Global Boun.ary Stratotype Section.an. Poin. （GSSP） for the Katian.Stage of the Upper Ordovician.Series is defin.d as the 4.0 m-level above the base of the Bigfork Chert in.the Black Kn.b Ridge section. southeastern.Oklahoma. This poin. in.this section.is coin.iden. with the first appearan.e of the graptolite Diplacan.hograptus caudatus, which has proved to be a reliable datum for precise worldwide correlation. The FAD ofD. caudatus occurs very n.ar the first occurren.es of the graptolites D. lan.eolatus, *** american.s, Orthograptus pagean.s, O. quadrimucron.tus, Dicran.graptus hian., an. n.urograptus margaritatus. This rapid succession.of fossil species appearan.e even.s provides a secure basis for iden.ification.of the base of the Katian.Stage of the Upper Ordovician.Series an. for its global chron.stratigraphic correlation.

关键词：层形断面奥陶纪俄克拉荷马州美国地质特点

Asymmetric Schottky Con.acts in.van.der Waals Metal-Semicon.uctor-Metal Structures Based on.Two-Dimen.ion.l j.n.s Materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research 2020年第1期2020卷 1108-1115页

作者： j.a Liu j.-Chan. Ren.Tao Shen.Xin.i Liu christopher j.Butch Shuan. Li Wei Liu n.n. an. Heterogen.ous Materials Cen.er School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Departmen. of Biomedical En.in.erin. Nanjing UniversityNanjingChina Blue Marble Space In.titute of Scien.e SeattleWashingtonUSA

Physical an. electron.c asymmetry plays a crucial role in.rectifiers an. other devices with a direction.lly varian. curren.-voltage(I-V)*** strategies for practically creatin. asymmetry in.n.n.scale compon.n.s have been.demon.trated,but complex fabrication.procedures,high cost,an. in.omplete mechan.stic un.erstan.in. have sign.fican.ly limited large-scale application. of these *** this work,we presen. den.ity fun.tion.l theory calculation. which demon.trate asymmetric electron.c properties in.a metal-semicon.uctor-metal(MSM)in.erface composed of stacked van.der Waals(vdW)*** MoSSe has an.in.rin.ic dipole due to its asymmetric structure an.,con.equen.ly,can.act as either an.n.type or p-type diode depen.in. on.the face at the in.erior of the stacked structure(SeMoS-SMoS ***-SMoS).In.each con.iguration.vdW forces domin.te the in.erfacial in.eraction.,an. thus,Fermi level pin.in. is largely *** tran.port calculation. show that n.t on.y does the in.rin.ic dipole cause asymmetric I-V characteristics in.the MSM structure but also that differen. tran.mission.mechan.sms are in.olved across the S-S(direct tun.elin.)an. S-Se in.erface(thermion.c excitation..This work illustrates a simple an. practical method to in.roduce asymmetric Schottky barriers in.o an.MSM structure an. provides a con.eptual framework which can.be exten.ed to other 2D j.n.s semicon.uctors.

关键词： Schottky asymmetric dipole

Syn.hesis, Biological Evaluation.an. Molecular Dockin. of n.vel Phen.lpyrimidin. Derivatives as Poten.ial An.ican.er Agen.s

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in.Chin.se Un.versities 2018年第6期34卷 912-917页

作者： j.n.Bo TAO Ye YAn. Hon.lian. Departmen. of Veterin.ry Medicin. North eastAgricultural University Harbin 150030 P. R. China Heilon.fian. Key Laboratory for An.mal Disease Con.rol an. Pharmaceutical Developmen. Harbin 150030 P. R. China School of Pharmaceutical Scien.es Jilin University Changchun 130021 P. R. China

Based on.our previous researches, a n.vel phen.lpyrimidin. pharmacophore model was proposed an. fifteen.derivatives were syn.hesized an. characterized by mean. of spectroscopy methods. The in.ibitory effects of them were screen.d again.t HeLa cell lin. by virtue of MTT assay in.vitro. The results in.icate some of the phen.l- pyrimidin. derivatives exhibit poten. biological activities. Amon. them, compoun.s 6g an. 6h exhibit the best activity at half maximal in.ibitory con.en.ration. of 1.5 an. 2.8 μmol/L, respectively. These compotmds also exhibit good activities again.t HepG2 cell lin. an. MCF-7 cell lin.. FLT-3 kin.se was screen.d as the most poten. molecular target. Computation.l dockin. between.compoun. 6g an. FLT-3 was carried on. to in.erpret the bin.in. mode. The results show phen.lpyrimidin. derivatives have effective an.itumor activities, which provides a base for further research of them as an.itumor agen.s.

关键词： Phen.lpyrimidin. An.ican.er activity Molecular dockin.

Expan.ion. for the Distribution.an. the Maximum from Distribution. with an.Asymptotically Gamma Tail When.a Tren. Is Presen.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sin.ca,En.lish Series 2015年第3期31卷 526-542页

作者： christopher S.WITHERS Saralees n.DARAj.H In.ustrial Research Limited Un.versity of Man.hester

We give expan.ion. about the Gumbel distribution.in.in.erse powers of n.an. logn.for Mn. the maximum of a sample size n.or n.＋ 1 when.the j.th observation.is μ（j.n. ＋ ej. μ is an. smooth tren. flmction.an. the residuals {ej. are in.epen.en. an. iden.ically distributed with P（e〉r）≈exp（-δx）x^do ∑k=1 ∞ckx^-kβ as -x→∞. We illustrate practical value of the expan.ion. usin. simulated data sets.

关键词： Bell polyn.mials expan.ion. expon.n.ial an. gamma tails Gumbel maximum tren.