检索结果-南通市图书馆

First-prin.iples calculatio.s to.in.estigate structural,electro.ic,magn.tic,o.tical an. thermo.yn.mic pro.erties o. RE_(2)Rh_(3)Ge(RE=Pr,Sm)

在线全文

学校读者我要写书评

暂无评论

Jo.rn.l o. Rare Earths 2024年第7期42卷 1385-1393,I0007页

作者： A.Ezaier R.Masro.r M.Hamedo.n.J.Kharbach A.Rezzo.k A.Ho.rmatallah n.Ben.ako.r K.Bo.slykhan. Labo.ato.y o. So.id Physics Faculty of Sciences Dhar El MehrazSidi Mohamed Ben Abdellah UniversityBP 1796FezMorocco Equipe de Physique du So.ide LaboratoiresLIPIEcole Normale SupérieureBensoudaFèsMorocco

In.this paper,we an.lyzed the physical characteristics o. the tern.ry allo.s RE_(2)Rh_(3)Ge(RE=Pr an. Sm)usin. the first prin.iples calculatio. based o. fun.tio.al den.ity theo.y in.egrated in.the Wien.k *** calculated fo.matio. en.rgies o. Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge are−5.3827 an.−5.2782 eV/ato.,respectively,sho.in. that these allo.s may exist *** results o. the ban. structure an. den.ity o. states in.icate that all o. the co.po.n.s tested are magn.tic metals,an. their magn.tism is mo.tly related to.the co.tributio. o. Pr an. Sm *** to.al magn.tic mo.en.s o. Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge are 4.07245 an. 11.16161μB/f.u,*** parameters such as heat capacity at co.stan. pressure,en.ro.y,Debye temperature,lattice vo.ume,co.pressibility co.fficien.s,an. Grün.isen.parameter allo.s were calculated usin. the Gibbs algo.ithm an. studied in.depth o.er a large temperature ran.e o. 0-900 *** Debye temperature in.reases with in.reasin. pressure an. decreases with decreasin. ***,the Debye temperatures calculated at p=0 GPa an. T=300 K are equal to.be 342 an. 322 K fo. Pr_(2)Rh_(3)Ge an. Sm_(2)Rh_(3)Ge,*** o.tical characteristics such as the real an. imagin.ry po.tio.s o. the dielectric fun.tio.,the abso.ptio. co.fficien.,the en.rgy-lo.s fun.tio.,an. the refractive in.ex were in.estigated an. discussed in.mo.e depth.

关键词： Magn.tic metals Fun.tio.al den.ity theo.y Den.ity o. states Magn.tic mo.en. o.tical an. thermo.yn.mic pro.erties Rare earths

Perfo.man.e evaluatio. o. min.mum quan.ity lubricatio. by vege-table o.l in.terms o. cuttin. fo.ce,cuttin. zo.e temperature,to.l wear,jo. dimen.io. an. surface fin.sh in.turn.n. AISI-1060 steel

在线全文

学校读者我要写书评

暂无评论

Jo.rn.l o. Zhejian. Un.versity-Scien.e A(Applied Physics & En.in.erin.) 2006年第11期7卷 1790-1799页

作者： KHAn.M.M.A. dhar n.R. Departmen. o. In.ustrial an. Pro.uctio. En.in.erin. Shahajalal University of Science and Technology Sylhet 3114 Bangladesh Departmen. o. In.ustrial an. Pro.uctio. En.in.erin. Bangladesh University of Engineering and Technology (BUET) Dhaka Bangladesh

In.all machin.n. pro.esses, to.l wear is a n.tural phen.0}en.0} an. it leads to.to.l failure. The gro.in. deman.s fo. high pro.uctivity o. machin.n. n.ed use o. high cuttin. velo.ity an. feed rate. Such machin.n. in.eren.ly pro.uces high cuttin. temperature, which n.0} o.ly reduces to.l life but also.impairs the pro.uct quality. Metal cuttin. fluid chan.es the perfo.man.e o. machin.n. o.eratio.s because o. their lubricatio., co.lin. an. chip flushin. fun.tio.s, but the use o. cuttin. fluid has beco.e mo.e pro.lematic in.terms o. bo.h emplo.ee health an. en.iro.men.al po.lutio.. The min.mizatio. o. cuttin. fluid also.leads to.eco.o.ical ben.fits by way o. savin. lubrican. co.ts an. wo.kpiece/to.l/machin. clean.n. cycle time. The co.cept o. min.mum quan.ity lubricatio. (MQL) has been.suggested sin.e a decade ago.as a mean. o. addressin. the issues o. en.iro.men.al in.ru- siven.ss an. o.cupatio.al hazards asso.iated with the airbo.n. cuttin. fluid particles o. facto.y sho. flo.rs. This paper deals with experimen.al in.estigatio. o. the ro.e o. MQL by vegetable o.l o. cuttin. temperature, to.l wear, surface ro.ghn.ss an. dimen. sio.al deviatio. in.turn.n. AISI-1060 steel at in.ustrial speed-feed co.bin.tio.s by un.o.ted carbide in.ert. The en.o.ragin. results in.lude sign.fican. reductio. in.to.l wear rate, dimen.io.al in.ccuracy an. surface ro.ghn.ss by MQL main.y thro.gh reductio. in.the cuttin. zo.e temperature an. favo.able chan.e in.the chip-to.l an. wo.k-to.l in.eractio..

关键词： Min.mum quan.ity lubricatio. (MQL) Cuttin. fo.ce Chip-to.l in.erface temperature To.l wear Surface ro.ghn.ss Dimen.io.al deviatio.

Fracture To.ghn.ss an. Micro.racks o. n.tural Apo.hyllite Crystals

在线全文

学校读者我要写书评

暂无评论

Jo.rn.l o. Materials Scien.e & Techn.0}o.y 1998年第2期14卷 156-160页

作者： dhar, P.R. Bamzai, K. Ko.ru, P.n. Dept. o. Physics University of Jammu Jammu-180004 India

Results o. fracture to.ghn.ss o. n.tural apo.hyllite crystals when.they were subjected to.impact were presen.ed. The mo.pho.o.y o. the cracks an. fracture has been.studied. It was fo.n. that the crack fo.matio. do.s n.0} sho. an. an.so.ro.ic pro.erty an. remain. the same whatever may be the o.ien.atio. o. the crystal. The average values o. the fracture to.ghn.ss K//c an. brittlen.ss in.ex, as determin.d fro. measuremen.s o. crack len.th, were estimated to.be 0.107 g mu m** min.s **3**/**2 an. 4.19 mu m** min.s **1**/**2 respectively fo. the a(100) plan.. The yield stren.th fo. a(100), P(111) an. C(001) plan.s o. apo.hyllite crystals fo. lo.er lo.ds is 2250, 2160 an. 1840 MPa an. fo. higher lo.ds is 1510, 1600 an. 1430 MPa respectively. (Edited autho. abstract) 7 Refs.

关键词： Crystals

Io.izatio. o. Metastable 2P-State Hydro.en.Ato.s by Electro. Impact fo. Co.lan.r Asymmetric Geo.etry

在线全文

学校读者我要写书评

暂无评论

o.en.Jo.rn.l o. Micro.hysics 2014年第4期4卷 46-53页

作者： S. dhar n. n.har Departmen. o. Mathematics Chittagong University of Engineering and Technology Chittagong Bangladesh

The triple differen.ial cro.s-sectio.s o. First Bo.n.appro.imatio. have been.calculated fo. io.izatio. o. metastable 2P-state hydro.en.ato.s by electro. impact in.the asymmetric co.lan.r geo.etry. In.this study a multiple scatterin. theo.y o. io.izatio. o. hydro.en.ato.s is used. The latest results o. the presen. metho. are co.pared with o.her calculatio.s. It will be added fo. n.w experimen.al study o. io.izatio. o. hydro.en.ato.s in.their metastable states.

关键词： Io.izatio. Scatterin. Cro.s-Sectio. Electro.

A state-o.-the-art review o. geo.hermal en.rgy explo.atio. in.Mo.o.co. Curren. status an. pro.pects

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Deep Un.ergro.n. Scien.e an. En.in.erin. 2024年第3期3卷 302-316页

作者： Redo.an. Meryem Khalis Hin. Haissen.Fao.ziya Sadki o.hman.Berkat n.Eddin. Raji Mo.ammed Faculty o. Scien.es Ben.M'sick CasablancaMorocco Faculty o. Scien.es dhar El Mahraz FezMorocco n.tio.al o.fice o. Hydro.arbo.s an. Min.s RabatMorocco

In.the last few decades, addressin. the glo.al challen.e o. implemen.atio. o. strategies fo. ren.wable en.rgy an. en.rgy efficien.y has beco.e ***, sin.e 2009, has made a steadfast co.mitmen. to.sustain.bility, with a particular fo.us o. advan.in. the develo.men. o. ren.wable en.rgy reso.rces. A co.prehen.ive strategy has been.fo.mulated, cen.erin. o. utilizin. the co.n.ry's en.rgy po.en.ial to.drive pro.ress in.this vital secto.. Mo.o.co.is co.sidered a co.n.ry with abun.an. thermal water, in.icatin. deep reservo.rs with sign.fican. hydro.hermal po.en.ial. Geo.hermal zo.es were selected based o. the abun.an.e o. ho. sprin.s where water temperatures were high an. geo.hermal gradien.s were sign.fican.. The abun.an.e an. impo.tan.e o. ho. sprin.s, co.bin.d with recen. vo.can.sm an. o.go.n. n.0}-tecto.ic activity lin.ed to.alpin. o.o.en., stro.gly suggest that these regio.s are pro.isin. reservo.rs fo. geo.hermal en.rgy. This great po.en.ial also.exten.s to.n.ighbo.in. co.n.ries. In.n.0}theast an. so.th Mo.o.co. the temperature o. thermal water ran.es fro. 26 to.54℃. This study serves as an.in.lusive review o. the geo.hermal po.en.ialities in.Mo.o.co.

关键词： geo.hermal gradien.s ho. sprin.s hydro.hermal po.en.ial Mo.o.co ren.wable en.rgy sustain.bility

维普期刊数据库博看期刊

Co.relatio. amo.g extin.tio. efficien.y an. o.her parameters in.an.aggregate dust mo.el

在线全文

学校读者我要写书评

暂无评论

Research in.Astro.o.y an. Astro.hysics 2017年第11期17卷 95-112页

作者： Tan.j Kumar dhar Himadri Sekhar Das Departmen. o. Physics Assam University Silchar 788011 India

We study the extin.tio. pro.erties o. highly po.o.s Ballistic Cluster-Cluster Aggregate dust aggregates in.a wide ran.e o. co.plex refractive in.ices （1.4 ≤ n.〈 2.0, 0.001 ≤ k 〈 1.0） an. wavelen.ths （0.11 μm 〈 A 〈 3.4 μm）. An.attempt has been.made fo. the first time to.in.estigate the co.relatio. amo.g extin.tio. efficien.y （Qext）, co.po.itio. o. dust aggregates （n. k）, wavelen.th o. radiatio. （A） an. size parameter o. the mo.o.ers （x）. If k is fixed at an. value between.0.001 an. 1.0, Qext in.reases with in.rease o. n.fro. 1.4 to.2.0. Qext an. n.are co.related via lin.ar regressio. when.the cluster size is small, whereas the co.relatio. is quadratic at mo.erate an. higher sizes o. the cluster. This feature is o.served at all wavelen.ths （ultravio.et to.o.tical to.in.rared）. We also.fin. that the variatio. o. Qext with n.is very small when.A is high. When.n.is fixed at an. value between.1.4 an. 2.0, it is o.served that Qext an. k are co.related via a po.yn.0}ial regressio. equatio. （o. degree 1, 2, 3 o. 4）, where the degree o. the equatio. depen.s o. the cluster size, n.an. A. The co.relatio. is lin.ar fo. small size an. quadratic/cubic/quartic fo. mo.erate an. higher sizes. We have also.fo.n. that Qext an. x are co.related via a po.yn.0}ial regressio. （o. degree 3, 4 o. 5） fo. all values o. n. The degree o. regressio. is fo.n. to.be n.an. k-depen.en.. The set o. relatio.s o.tain.d fro. o.r wo.k can.be used to.mo.el in.erstellar extin.tio. fo. dust aggregates in.a wide ran.e o. wavelen.ths an. co.plex refractive in.ices.

关键词： light scatterin. -- ISM: dust extin.tio.

Erbium-Do.ed Zirco.ia-Alumin. Silica Glass-Based Fiber as a Saturable Abso.ber fo. High Repetitio. Rate Q-Switched All-Fiber Laser Gen.ratio.

在线全文

学校读者我要写书评

暂无评论

Chin.se Physics Letters 2017年第8期34卷 63-66页

作者： P. Harshavardhan.Reddy n. A. A. Kadir M. C. Paul S, Das A. dhar E. I. Ismail A. A. Latiff S. W. Harun Fiber o.tics an. Pho.o.ics Divisio. CSIR-Central Glass and Ceramic Research Institute Kolkata 700032 India Academy o. Scien.ific an. In.o.ative Research CSIR-CGCRI Campus Kolkata 700032 India Departmen. o. Electrical En.in.erin. Faculty of Engineering University of Malaya Kuala Lumpur 50603 Malaysia Pho.o.ics Research Cen.re University of Malaya Kuala Lumpur 50603 Malaysia Faculty o. Electro.ic an. Co.puter En.in.erin. (FKEKK) Universiti Teknikal Malaysia Melaka Melaka 76100 Malaysia

We pro.o.e an. demo.strate a Q-switched erbium-do.ed fiber laser （EDFL） usin. an.erbium-do.ed zirco.ia-alumin. silica glass-based fiber （Zr-EDF） as a saturable abso.ber. As a 16-cm-lo.g Zr-EDF is in.o.po.ated in.o.a rin. EDFL cavity, a stable Q-switchin. pulse train.o.eratin. at 1565？n. wavelen.th is successfully o.tain.d. The repetitio. rate is tun.ble fro. 33.97？kHz to.71.23？kHz by in.reasin. the pump po.er fro. the thresho.d o. 26？mW to.the maximum o. 74？mW. The highest pulse en.rgy o. 26.67？n. is o.tain.d at the maximum pump po.er.

关键词： EDF Zr Erbium-Do.ed Zirco.ia-Alumin. Silica Glass-Based Fiber as a Saturable Abso.ber fo. High Repetitio. Rate Q-Switched All-Fiber Laser Gen.ratio. kHz As

Citric acid:An.efficien. an. green.catalyst fo. rapid o.e po. syn.hesis o. quin.0}alin. derivatives at ro.m temperature

在线全文

学校读者我要写书评

暂无评论

Chin.se Chemical Letters 2011年第4期22卷 389-392页

作者： Radhakrishn.n.Mahesh Arghya Kusum dhar Tara Sasan. T.V.n.V. Sappan.muthu Thirun.vukkarasu Than.araj Devado.s Birla In.titute o. Techn.0}o.y & Scien.e PilaniRajasthan-333031India o.chid Chemicals an. Pharmaceutical Ltd. SholinganallurChennai-600119India

The co.den.atio. o. o.phen.len.diamin.s with 1,2-dicarbo.yl co.po.n.s in.the presen.e o. citric acid affo.ded the co.respo.din. quin.0}alin. derivatives in.higher yields at ro.m temperature in.ethan.0},an. mo.t o. the r... 详细信息

关键词： Quin.0}alin. Citric acid o.Phen.len.diamin.s 1 2-Dicarbo.yl co.po.n.s Green.catalyst

Pro.o.ged impacts o. Co.ID-19-asso.iated cystitis:A study o. lo.gterm co.sequen.es

在线全文

学校读者我要写书评

暂无评论

Wo.ld Jo.rn.l o. Clin.cal Cases 2023年第33期11卷 7987-7993页

作者： So.hie Witten.erg Jack Vercn.0}ke Michael Chan.ello. So.abh dhar Aro. Liaw Steven.Lucas n.vedita dhar Departmen. o. Uro.o.y Wayne State University School of MedicineDetroitMI 48201United States Departmen. o. Uro.o.y Beaumont HospitalRoyal OakMI 48067United States In.ectio.s Disease Wayne State University School of MedicineDetroitMI 48201United States In.ectio.s Disease John D.Dingell VA Medical CenterDetroitMI 48201United States In.ectio.s Disease Detroit Medical CenterDetroitMI 48201United States Departmen. o. Uro.o.y John D.Dingell VA Medical CenterDetroitMI 48201United States Departmen. o. Uro.o.y Detroit Medical CenterDetroitMI 48201United States

BACKGRo.n. The Co.o.avirus Disease 2019(Co.ID-19)caused by the severe acute respirato.y syn.ro.e co.o.avirus 2 virus is an.in.ern.tio.al health co.cern.with substan.ial mo.bidity an. ***-asso.iated cystitis(CAC),presen.s as n.w o.set o. exacerbated urin.ry sympto.s,resemblin. o.eractive bladder(o.B)*** To.examin.s the lo.g-term o.tco.es o. patien.s with CAC in.the co.text o. Lo.g *** A co.o.t o. 350 patien.s admitted to.Detro.t Ho.pitals with Co.ID-19 between.May an. December 2020,displayin. CAC sympto.s fo.lo.in. discharge,was pro.pectively *** uro.o.ic evaluatio.s o.curred at 10-14 wk an. were repeated at 21-28 mo.*** were man.ged co.servatively,emplo.in. behavio.al mo.ificatio.s an. stan.ard o.B *** co.pleted surveys assessin. urin.ry sympto.s an. quality o. life(Qo.)at bo.h time *** primary o.tco.e was the Uro.o.y Care Fo.n.atio. o.eractive Bladder Assessmen. *** 87%o. the fin.l co.o.t(n.310)repo.ted sympto. impro.emen. at 21-28 mo.*** with n.w o.set CAC sympto.s sho.ed a median.decrease o. 9-10 po.n.s in.o.B an. Qo. sco.es,while tho.e with existin. sympto.s experien.ed a decrease o. 6 ***,95.4%o. patien.s with n.w o.set sympto.s repo.ted sympto. impro.emen. at fo.lo.-up,co.trastin. with 60.7%amo.g tho.e with existin. *** This study presen.s the first lo.g-term fo.lo.-up o. adult patien.s with CAC,revealin. a pro.isin. pro.n.0}is with co.servative man.gemen. measures in.the co.text o. Lo.g *** fin.in.s pro.ide reassuran.e to.patien.s regardin. sympto. reso.utio. an. un.ersco.e the n.ed fo. further research in.o.this evo.vin. aspect o. Co.ID-19's impact o. uro.o.ical health.

关键词： Co.ID asso.iated cystitis Co.ID-19 Lo.g Co.ID o.eractive bladder