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Electromechani.al coupli.g effect on electroni. properti.s of double-walled boron ni.ri.e nanotubes

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Acta Mechani.a Si.i.a 2012年第6期28卷 1532-1538页

作者： Zhu-Hua Zhang Wan-Li. Guo Bori. i. Yakobson Department of Mechani.al Engi.eeri.g and Materi.ls Sci.nce Rice University Key Laboratory for i.telli.ent Nano Materi.ls and Devi.es of Mi.i.try of Educati.n and i.sti.ute of Nano Sci.nce Nanjing University of Aeronautics and Astronautics

We report on a fi.st-pri.ci.les study of a novel band modulati.n i. zi.zag double-walled boron ni.ri.e nan- otubes （DBNNTs） by applyi.g radi.l strai. and coupled ex- ternal electri. fi.ld. We show that the band ali.nment be- tween the i.ner and outer walls of the DBNNTs can be tuned from type i.to type i. wi.h i.creasi.g radi.l strai., accompa- ni.d wi.h a di.ect to i.di.ect band gap transi.i.n and a sub- stanti.l gap reducti.n. The band gap can be further si.ni.i. cantly reduced by applyi.g a transverse electri. fi.ld. The coupli.g of electri. fi.ld wi.h the radi.l strai. makes the fi.ld-i.duced gap reducti.n bei.g ani.otropi. and more re- markable than that i. undeformed DBNNTs. i. parti.ular, the gap vari.ti.n i.duced by electri. fi.ld perpendi.ular to the radi.l strai. i. the most remarkable among all the modu-lati.ns. These tunable properti.s by electromechani.al cou- pli.g i. DBNNTs wi.l greatly enri.h thei. versati.e appli.a- ti.ns i. future nanoelectroni.s.

关键词： Boron ni.ri.es nanotubes Radi.l deformati.n Electri. fi.ld Band gap

Magnetohydrodynami. approach of non-Newtoni.n blood flow wi.h magneti. parti.les i. stenosed artery

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Appli.d Mathemati.s and Mechani.s(Engli.h Edi.i.n) 2017年第3期38卷 379-392页

作者： i. A. Mi.ZAt M. ABDULHAMEED S. SHAFi. Abdus Salam School of Mathemati.al Sci.nces Government College University Lahore 54000 Pakistan School of Sci.nce and Technology Federal Polytechnic P. M. B. Bauchi 0231 Nigeria Department of Mathemati.al Sci.nces Faculty of Science Universiti Teknologi Skudai 81310 Malaysia

The non-Newtoni.n blood flow, together wi.h magneti. parti.les i. a stenosed artery, i. studi.d usi.g a magneto-hydrodynami. approach. The wall sli. condi.i.n i. also consi.ered. Approxi.ate soluti.ns are obtai.ed i. seri.s forms under the assumpti.n that the Womersley frequency parameter has small values. Usi.g an i.tegral transform method, analyti.al soluti.ns for any values of the Womersley parameter are *** si.ulati.ns are performed usi.g MATHCAD to study the i.fluence of stenosi. and magneti. fi.ld on the flow parameters. When enteri.g the stenosed area, blood veloci.y i.creases sli.htly, but i.creases consi.erably and reaches i.s maxi.um value i. the stenosi. throat. i. i. concluded that the magni.ude of axi.l veloci.y vari.s consi.erably when the appli.d magneti. fi.ld i. strong. The magni.ude of maxi.um flui. veloci.y i. hi.h i. the case of weak magneti. fi.lds. Thi. i. due to the Lorentz's force that opposes moti.n of an electri.ally conducti.g flui.. The effect of externally transverse magneti. fi.ld i. to decelerate the flow of blood. The shear stress consi.tently decreases i. the presence of a magneti. fi.ld wi.h i.creasi.g i.tensi.y.

关键词： Bi.gham plasti. flui., magneti. parti.le, blood flow, magnetohydrodynam-i.s, artery stenosi.

A reali.ti. topologi.al p-n juncti.n at the Bi.Se3 （0001） surface based on planar twi. boundary defects

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Nano Research 2017年第5期10卷 1784-1793页

作者： Hugo Aramberri.M. Carmen Munoz Jorge i. Cerda i.sti.uto de Ci.nci. de Materi.les de Madri. (i.MM-CSi.) Cantoblanco Madrid 28049 Spain

We propose a reali.ti. topologi.al p-n juncti.n （TPNJ） by matchi.g two Bi.Se3 （0001） slabs wi.h opposi.e arrangements of planar twi. boundary defects. The atomi.ti. modeli.g of such a devi.e leads to di.locati.n defects i. the hexagonal latti.e i. several qui.tuple layers. Nevertheless, total energy calculati.ns reveal that the i.terface relaxes, yi.ldi.g a smooth geometri.al transi.i.n that preserves the nearest-nei.hbors fcc-type geometry throughout these defect layers. The electroni., magneti., and transport properti.s of the juncti.n have then been calculated at the ab i.i.i. level under open boundary condi.i.ns, i.e., employi.g a thi.-fi.m geometry that i. i.fi.i.e along the electron transport di.ecti.n. i.deed, a p-n juncti.n i. obtai.ed wi.h a bui.t-i. potenti.l as large as 350 meV. The calculati.ns further reveal the spi. texture across the i.terface wi.h unprecedented detai.. As the mai. result, we obtai. non-negli.i.le transmi.si.n probabi.i.i.s around the F poi.t, whi.h i.volve an electron spi.-fli. process whi.e crossi.g the i.terface.

关键词： topologi.al i.sulators p-n juncti.ns spi.troni.s electroni. devi.es twi. boundari.s

Sex-dependent alterati.ns i. extracellular vesi.les li.ki.g chroni. spi.al cord i.jury to brai. neuroi.flammati.n and neurodegenerati.n

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Neural Regenerati.n Research 2025年第2期20卷 483-484页

作者： Yun Li.Junfang Wu Department of Anesthesi.logy&Shock Trauma and Anesthesiology Research(STAR)CenterUniversity of Maryland School of MedicineBaltimoreMDUSA

Traumati. spi.al cord i.jury(SCi.i. a devastati.g exogenous i.jury wi.h long-lasti.g consequences and a leadi.g cause of death and di.abi.i.y *** i. assi.ti.e technology,rehabi.i.ati.e i.terventi.ns,and the abi.i.y to i.enti.y and i.tervene i. secondary condi.i.ns have si.ni.i.antly i.creased the long-term survi.al rate of SCi.pati.nts,wi.h some people even li.i.g well i.to thei. seventh or ei.hth *** survi.al changes have led neurotrauma researchers to exami.e how SCi.i.teracts wi.h brai. *** health and epi.emi.logi.al data showed that pati.nts wi.h long-term SCi.can have a lower li.e expectancy and quali.y of li.e,along wi.h a hi.her ri.k of comorbi.i.i.s and compli.ati.ns.

关键词： alterati.ns i.flammati.n i.jury

i.on-handli.g solute carri.r SLC22A17 as a blood-brai. barri.r target after stroke

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Neural Regenerati.n Research 2025年第11期20卷 3207-3208页

作者： Xueqi.Ren Wenlu li Key Laboratory of Neuropharmacology and Translati.nal Medi.i.e of Zheji.ng Provi.ce School of Pharmaceutical SciencesZhejiang Chinese Medical UniversityHangzhouZhejiang ProvinceChina Neuroprotecti.n Research Laboratori.s Departments of Radiology and NeurologyMassachusetts General HospitalHarvard Medical SchoolBostonMAUSA

The pathophysi.logy of i.chemi. stroke i. complex and multi.actori.l,i.volvi.g vari.us forms of cell death such as apoptosi.,autophagy,and necrosi..A recent study suggests that oxi.ati.e and i.flammatory stress can i.duce ferroptosi.,a speci.li.ed form of cell death characteri.ed by the accumulati.n of li.i. peroxi.es dependent on i.tracellular i.on overload(Li.and Ji.,2023).

关键词： death speci.li.ed barri.r

i.enti.i.ati.n of Nonstati.nary Cellular Automata

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Journal of Computer Sci.nce & Technology 1992年第4期7卷 379-382页

作者： Andrew i. Adamatzky Bi.physi.s Department Sankt-Petersburg University Universitetskaya nab 7/9 Sankt-Petersburg 199164 Russia

The pri.ci.al feature of nonstati.nary cellular automata (NCA) i. that a local transi.i.n rule of each cell i. changed at each ti.e step dependi.g on nei.hborhood confi.urati.n at previ.us ti.e- step The i.enti.i.ati.n problem for NCA i. extracti.n of local transi.i.n rules and the establi.hment of mecha- ni.m for changi.g these rules usi.g sequence of NCA confi.urati.ns. We present seri.l and parallel algori.hms for i.enti.i.ati.n of NCA.

关键词： i.enti.i.ati.n of Nonstati.nary Cellular Automata NCA

Resi.ents'percepti.n of sustai.able touri.m i. protected mountai. areas:the case of Asturi.s

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Journal of Mountai. Sci.nce 2022年第12期19卷 3597-3614页

作者： MAGADAN-Di.Z Marta Ri.AS-GARCi. Jesus i. Faculty of Busi.ess and Communi.ati.n Universidad Internacional de La RiojaAvda.de la Paz 137Logrono 26o06Spain

Spai. i. the country wi.h the most Bi.sphere Reserves i. the world,52,and Asturi.s,wi.h 7,ranks fi.st among the si.gle-provi.ce Autonomous *** touri.t i.terest i. these natural spaces i. i.creasi.g,but li.tle or nothi.g i. known about how the resi.ents of these natural spaces percei.e the touri.t *** mai. objecti.e of thi. research was to evaluate the resi.ents’percei.ed changes i. protected mountai. areas i. Asturi.s concerni.g the envi.onmental,soci.cultural,and economi. di.ensi.ns related to touri.m acti.i.y wi.h survey methods and vari.us quanti.ati.e *** fi.di.gs obtai.ed were the followi.g:fi.stly,there were si.ni.i.ant di.ferences between the resi.ents’soci.demographi. characteri.ti.s and thei. percepti.ns of touri.m i.pacts;secondly,there were posi.i.e relati.nshi.s between the resi.ents’percei.ed touri.m economi.,envi.onmental and soci.cultural i.pacts and thei. general atti.ude towards touri.m development;and thi.dly,the more posi.i.e the resi.ents’atti.ude towards touri.m development,the more li.ely resi.ents acti.ely support i.s further *** fi.di.gs i.di.ate the wi.li.gness of resi.ents to get i.volved and parti.i.ate i. the touri.m acti.i.y,so poli.ymakers should i.pli.ate resi.ents i. deci.i.nmaki.g on local touri.m *** conclusi.n,long-term moni.ori.g of resi.ents’evoluti.n of thei. percepti.ns and atti.udes i. necessary to achi.ve sustai.able touri.m development.

关键词： Sustai.able touri.m Touri.ts’percepti.n Survey method Regressi.n analysi. Asturi.s

i.vesti.ati.n on the mechani.al properti.s of si.tered porous copper compacts

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Chi.a Parti.uology 2007年第6期5卷 391-394页

作者： Yasser M.Z. Ahmed Mohamed i. Ri.d Ahmed i. Zaky Mohammed Abdel-Azi. Mohamed M.H. Shalabi Central Metallurgi.al Research and Development i.sti.ute CMRDI El-Felzat Street El-Tabbin P.O. Box 87 Helwan Cairo Egypt

i. li.e wi.h recent attenti.n on porous metals havi.g low and medi.m porosi.i.s i. the range of 20-50%, thi. paper studi.s the effect of porosi.y on the mechani.al properti.s of si.tered copper compacts. Experi.ents were desi.ned to i.vesti.ate the effect of porosi.y, appli.d stress and sli.i.g veloci.y on the wear rate of copper compacts, leadi.g to the fi.di.g that the effects of both porosi.y and appli.d stress of the wear test on the wear rate are approxi.ately si.i.ar and hi.her than that of sli.i.g veloci.y. The i.vesti.ati.n concerni.g the effect of porosi.y on compressi.e strength i.di.ated that the stress-strai. curve of hi.h-porosi.y compact exhi.i.ed i.enti.i.ble ulti.ate strength poi.ts, though low-porosi.y compact showed di.ti.ct stages of elasti. plasti. behavi.r.

关键词： Porous copper Wear rate Compressi.e strength Experi.ental desi.n techni.ue

Mi.rostructural evoluti.n duri.g the progressi.e transformati.n-i.duced plasti.i.y effect i. a Fe-0.1C-5Mnmedi.m manganese steel

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i.ternati.nal Journal of Mi.erals,Metallurgy and Materi.ls 2025年第2期32卷 369-379页

作者： Mei.Zhang Wenhao Li.Yangfei.Chen Yang Ji.ng Xi.ofei.Guo Han Dong School of Materi.ls Sci.nce and Engi.eeri.g Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Speci.l Steel Shanghai UniversityShanghai 200444China

The mi.rostructural evoluti.n of a cold-rolled and i.tercri.i.al annealed medi.m-Mn steel(Fe-0.10C-5Mn)was i.vesti.ated duri.g uni.xi.l tensi.e ***-si.u observati.ns under scanni.g electron mi.roscopy,transmi.si.n electron mi.roscopy,and X-ray di.fracti.n analysi. were conducted to characteri.e the progressi.e transformati.n-i.duced plasti.i.y process and associ.ted fracture i.i.i.ti.n *** fi.di.gs were di.cussed wi.h the local strai. measurements vi. di.i.al i.age *** results i.di.ated that Lüders band formati.n i. the steel was li.i.ed to 1.5%strai.,whi.h was mai.ly due to the early-stage martensi.i. phase transformati.n of a very small amount of the less stable large-si.ed retai.ed austeni.e(RA),whi.h led to locali.ed stress concentrati.ns and strai. hardeni.g and further retardati.n of *** small-si.ed RA exhi.i.ed hi.h stabi.i.y and progressi.ely transformed i.to martensi.e and contri.uted to a stably extended Portevi.-Le Chateli.r *** volume fracti.n of RA gradually decreased from 26.8%to 8.2%pri.r to *** the late deformati.n stage,fracture i.i.i.ti.n pri.ari.y occurred at the austeni.e/martensi.e and ferri.e/martensi.e i.terfaces and the ferri.e phase.

关键词： medi.m-Mn steel retai.ed austeni.e progressi.e transformati.n-i.duced plasti.i.y effect local strai. fracture i.i.i.ti.n