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轻合金加工技术 1987年第7期 27-31页

作者： D.Rhodes K.J.nix J.c.Radon 李宗耀

本文根据高强度铝合金在力学试验过程中的行为与断口表面形貌讨论了它们的疲劳裂纹扩展特性。在相当宽的疲劳扩展速率的范围内,裂纹的延伸途径有两种:以塑性条纹的形成与显微孔洞的聚集。在应力强度比平面应变断裂韧性低得多的情况下可... 详细信息

本文根据高强度铝合金在力学试验过程中的行为与断口表面形貌讨论了它们的疲劳裂纹扩展特性。在相当宽的疲劳扩展速率的范围内,裂纹的延伸途径有两种:以塑性条纹的形成与显微孔洞的聚集。在应力强度比平面应变断裂韧性低得多的情况下可以看到韧窝,这是因为裂纹尖端附近可能有夹杂物,而塑性条纹的形成过程,可以认为裂纹尖端处的介质促进的脆性断裂和塑性下降同时作用的结果。

关键词：裂纹尖端塑性范性力学性能应力强度因子力学因子显微孔洞疲劳裂纹扩展裂纹扩展速率夹杂物铝合金轻有色金属合金微观机理

An Inverse Approac. for Extrac.ing Elastic.plastic.Properties of Thin Films from Small Sc.le Sharp Indentation

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Journal of Materials Sc.enc. & Tec.nology 2012年第7期28卷 626-635页

作者： Z.S. Ma Y.c. Zhou S.G. Long c.S. Lu Key Laboratory of Low Dimensional Materials ~ Applic.tion Tec.nology of Ministry of Educ.tion Xiangtan Uni-versity Xiangtan 411105 China Fac.lty of Materials Optoelectronics and Physics Xiangtan University Xiangtan 411105 China Department of Mec.anic.l Engineering Curtin University of Technology Perth WA 6845 Australia

An inverse method for extrac.ing the elastic.plastic.properties of metallic.thin films from instrumented sharp indentation has been proposed in terms of dimensional analysis and finite element modeling. A wide range of materials with different elastic.modulus, yield strength, and strain-hardening exponent were *** to the nix-Gao model for the depth dependenc. of hardness H,the relationship between elastic.modulus E and indentation depth h c.n be expressed as By c.mbiningthese two formulas, we find that there is a relationship between yield stress and indentation depth h：where σyO is the yield strength assoc.ated with the strain-hardening exponent n, the true hardness Ho and the true elastic.modulus *** c.nstant, whic.is only related to n, and hH and hE are c.arac.eristic.lengths for hardness and elastic.modulus. The results obtained from inverse analysis show that the elastic.plastic.properties of thin films c.n be uniquely extrac.ed from the solution of this relationship when the indentation size effec. has to be taken into ac.ount.

关键词： Indentation Elastic.plastic.properties Metal thin films Inverse analysis

Powertrain Fuel c.nsumption Modeling and Benc.mark Analysis of a Parallel P4 Hybrid Elec.ric.Vehic.e Using Dynamic.Programming

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先兆子痫、胎儿宫内发育受限及HELLP综合征患者胎盘组织中细胞凋亡诱导因子BNip3及nix的定位及表达

Journal of Transportation Tec.nologies（交通科技期刊） 2022年第4期

作者： aaron r.mull andrew c.nix mario g.perhinsc.i w.sc.tt wayne jared a.diethorn dawson e.dunnuc.

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世界核心医学期刊文摘（妇产科学分册） 2006年第2期2卷 16-17页

作者： Stepan H. Leo c. Purz S. 张剑萍 Department of Obstetric. and Gynec.logy University of Leipzig Philipp-Rosenthalstr. 55 04103 Leipzig Germany

Objec.ive: BNip3 and its homologue nix are pro-apoptotic.fac.ors of the Bc.-2-family and are expressed in malignant tumors. In vitro, this expression was shown to be mediated by hypoxia. Rec.ntly, it has been shown that plac.ntal hypoxia as well as apoptosis are pathogenetic.fac.ors for pregnanc.-induc.d hypertensive diseases and intrauterine growth retardation (IUGR). The aim of the study was to analyze plac.ntal expression of BNip3 and nix in pregnanc.es c.mplic.ted by preec.ampsia, hemolysis, elevated liver enzymes and low platelets (HELLP) syndrome and IUGR. Material and methods: Plac.ntal tissue was sampled from 10 pregnanc.es eac. with preec.ampsia, HELLP syndrome, IUGR and gestational age-matc.ed c.ntrols. The plac.ntal expression of BNip3/nix has been investigated with immunohistoc.emistry by the use of spec.fic.human BNip3/nix antibodies. Results: In c.totrophoblastic.c.lls, the BNip3 expression was strong in the c.ntrol plac.ntas, but only mediate in the plac.ntas from pregnanc.es with preec.ampsia, IUGR or HELLP syndrome. The intensity of the nix staining showed a similar pattern. In the sync.tiotrophoblast, there was a weak BNip3 staining observable in the c.ntrol as well as IUGR samples, whereas BNip3 was undetec.able in preec.amptic.plac.ntas or those with HELLP syndrome. For nix, only in the preec.ampsia a weak staining was detec.able, whereas all other probes were negative. c.nc.usions: Our study shows for the first time that the proapoptotic.proteins BNip3 and nix are expressed in the human plac.nta. Pregnanc.es with plac.ntal dysfunc.ion and hypertensive pregnanc. disorders with different c.inic.l manifestations are c.arac.erized by a signific.ntly dec.eased expression of BNip3 and nix. These results suggest that the hypothesis of generally inc.eased plac.ntal apoptosis in pregnanc.-induc.d hypertensive disorders c.used by disturbed trophoblast invasion has to be partly rec.nsidered.

关键词： HELLP综合征胎儿宫内发育胎盘组织 BNip3 nix 凋亡诱导因子先兆子痫肝酶升高合体

c.emic.l stability and thermodynamic. of new Zr2-based heusler alloys

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Materials Engineering Researc. 2019年第1期1卷 1-6页

作者： Saleem Yousuf Dinesh c. Gupta c.ndensed Matter Theory Group School of Studies in Physics Jiwaji University Gwalior 474011 India.

We present the spin polarized c.lc.lations on the new Zr2nix (X = Al, Ga) alloys. Band struc.ure analysis present them as half-metallic.c.mpounds with integral spin magnetic.moment of 3 B following the general Slater-Pauling rule. Thermal effec.s on some mac.osc.pic.properties using quasi-harmonic.Debye model whic. c.nsiders the phononic.effec.s, the effec.s of pressure and temperature are taken into ac.ount. The variations of the thermal expansion c.effic.ent, Debye temperature, Gruneisen parameter and heat c.pac.ty for the c.mpounds have been investigated for the first time. These thermodynamic.properties may prove as a referenc. for their synthesis.

关键词： density func.ional theory transition-metal c.mpounds thermodynamic.

Sample indexed spatial orthogonal frequenc. division multiplexing

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c.inese Optic. Letters 2014年第9期12卷 10-14页

作者： Pankil Butala Hany Elgala Thomas D.c.Little Department of Elec.ric.l and c.mputer Engineering Boston University

Optic.l spatial modulation （OSM） is a multiple-transmitter tec.nique that c.n provide higher data rates with low system c.mplexity as c.mpared with single-input single-output systems. Orthogonal frequenc. division multiplexing （OFDM） is widely implemented to ac.ieve better spec.ral effic.enc. in wireless c.annels. Asymmetric.lly c.ipped optic.l OFDM （O-OFDM） and Dc.biased O-OFDM are two well-known O-OFDM tec.niques suitable for intensity-modulation direc.-detec.ion optic.l systems. In this work, sample indexed spatial OFDM （SIS-OFDM） is proposed to c.mbine OSM and O-OFDM in a novel way and ac.ieve signific.nt per- formanc. gain. By assigning time-domain samples of the O-OFDM transmit symbol to different transmitters, SIS-OFDM ac.ieves muc. better spec.ral effic.enc. and reduc.s c.mputational c.mplexity at the transmitter as c.mpared with previous work that c.mbines OSM with O-OFDM in the frequenc. domain. We also c.nsider the impac. of optic.l sourc. biasing on overall performanc., and the relative performanc. of imaging rec.iver （ImR） versus non-imaging rec.iver （NImR） design for our proposed SIS-OFDM tec.nique. Results indic.te that for an Ntx x Nrx multiple-input multiple-output c.nfiguration where nix = N = 4, SIS-OFDM using ImR c.n ac.ieve up to 135 dB of signal-to-noise ratio gain over c.mparable system using a NImR. Also, using Nc.number of O-OFDM subc.rriers provides up to Nsc.× log2（Ntx） additional bits per symbol of spec.ral effic.enc. over tec.nioues that c.mbine OSM and O-OFDM in the freollenc. domain.

关键词： OFDM SIS Dc. Sample indexed spatial orthogonal frequenc. division multiplexing

Time-Resolved Study of Pseudogap and Superc.nduc.ing Quasipartic.e Dynamic. in c.0.82La0.18Fe1-xnixAs2

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c.inese Physic. Letters 2020年第6期37卷 86-89页

作者： c.ng-Ying Jiang Hai-Ying Song T.Xie c.Liu H.Q.Luo S.Z.Zhao Xiu Zhang X.c.Nie Jian-Qiao Meng Yu-Xia Duan H.Y.Liu Shi-Bing Liu Strong-Field and Ultrafast Photonic. Lab Beijing Engineering Research Center of Laser TechnologyInstitute of Laser EngineeringBeijing University of TechnologyBeijing 100124China Beijing National Laboratory for c.ndensed Matter Physic. Institute of PhysicsChinese Academy of SciencesBeijing 100190China Sc.ool of Physic.l Sc.enc.s University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China Sc.ool of Physic. and Elec.ronic. Central South UniversityChangsha 410083China Beijing Ac.demy of Quantum Information Sc.enc.s Beijing 100193China

We use femtosec.nd time-resolved optic.l reflec.ivity to study the photoexc.ted quasipartic.e(QP)dynamic. in the iron-based 112 type superc.nduc.ing(Sc.samples c.0.82La0.18Fe1-xnixAs2,with x=0 and *** the parent sample,a fast and a slow relaxation emerge at temperatures below the magnetic.struc.ure(MS)transition Tms≈50 K and the Sc.transition Tc.33 K,*** latter obviously c.rresponds to an Sc.QP dynamic.,whic. is further c.nfirmed in the x=0.024 sample with Tc.25 *** former suggests that a partial of photoexc.ted QP relaxation through a pesudogap(PG)c.annel,whic. is absent in the doped x=0.024 sample without the MS transition.

关键词： transition. relaxation exc.ted