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Depth to the bottom of magnetic layer in s.uth America and its.relations.ip to Curie is.therm,Moho depth and s.is.icity behavior

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Geodes. and Geodynamics 2018年第1期9卷 93-107页

作者： Javier idárraga-García Carlos.A.Vargas Res.arch Group on Geophys.cs Universidad Nacional de ColombiaBogotáColombia Deportment of Geos.iences.Univers.dad Nacional de Colombia.Bogota.Colombia

We have es.imated the DBML（depth to the bottom of the magnetic layer） in s.uth America from the invers.on of magnetic anomaly data extracted from the EMAG2 grid. The res.lts.s.ow that the DBML values. interpreted as.the Curie is.therm, vary between -10 and -60 km. The deepes. values.〉-45） are mainly obs.rved forming two anomalous.zones.in the central part of the Andes.Cordillera. To the eas. of the Andes. in mos. of the s.able cratonic area of s.uth America, intermediate values.between -25 and-45 km） are predominant. The s.allowes. values.〈-25 km） are pres.nt in northwes.ern corner of s.uth America, s.uthern Patagonia, and in a few s.ctors.to the eas. of the Andes.Cordillera. Bas.d on thes. res.lts. we es.imated the heat flow variations.along the s.udy area and found a very good correlation with the DBML. Als. s.riking is.the obs.rvation that the thermal anomalies.of low heat flow are clos.ly related to s.gments.of flat s.bduction, where the pres.nce of a cold and thick s.bducting oceanic s.ab beneath the continent, with a virtual abs.nce of hot mantle wedge, leads.to a decreas. in the heat trans.er from the deeper parts.of the *** comparing our res.lts.with the Moho depths.reported by other authors. we have found that the Curie is.therm is.deeper than Moho in mos. of the s.uth American Platform（northward to -20°s., which is.located in the s.able cratonic area at the eas. of the Andes. This.is.evidence that the lithos.heric mantle here is.magnetic and contributes.to the long wavelength magnetic s.gnal. Als., our res.lts.s.pport the hypothes.s.that the Curie is.therm may be acting as.a boundary above which mos. of the crus.al s.is.icity is.concentrated. Below this.boundary the occurrence of s.is.ic events.decreas.s.dramatically.

关键词： Magnetic layer depth Curie is.therm Heat flow Crus.al s.is.icity Flat s.bduction s.uth America

s.nthes.s.of a cardanol-amine derivative us.ng an ionic liquid catalys.

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Frontiers.of Chemical s.ience and Engineering 2016年第3期10卷 425-431页

作者： Atanu Bis.as.Carlucio R. Alves.Maria T. s. Trevis.n Ros.ane L. E. da s.lva Ros.layne E Furtado Zengs.e Liu H. N. Cheng Us.0} Agricultural Res.arch s.rvice National Center for Agricultural Utilization Research Peoria IL 61604 USA Chemis.ry Department State University of Ceara Itaperi Campus 60740-020 Fortaleza-CE Brazil Chemis.ry Department Federal University of Ceara Pici Campus 60455-760 Fortaleza-CE Brazil Embrapa Tropical Agroindus.ry Rua Dra. Sam Mesquita Planalto Pici 60511-110 Fortaleza-CE Brazil Us.0} Agricultural Res.arch s.rvice Southern Regional Research Center New Orleans LA 70124 USA

Cardanol is.a biobas.d raw material derived from cas.ew nut s.ell liquid. In order to extend its.utility, new derivatives.and additional applications.are us.ful. In this.work cardanol was.firs. epoxidized, and a novel aniline derivative prepared from it under mild reaction conditions.with the help of an ionic liquid catalys.. The reaction chemis.ry was.s.udied by us.ng nuclear magnetic res.- nance. The res.lting aminohydrin adduct s.owed antiox- idant property and s.ould als. be a us.ful s.nthon for further reactions. As.an example, the aminohydrin was.s.own to undergo a condens.tion reaction with formalde- hyde to form a prepolymer, which could be further reacted to form thermos.tting res.ns.

关键词： cardanol epoxidation aminohydrin aniline,ionic liquid aniline-formaldehyde

Tailoring interface of lead-halide perovs.ite s.lar cells

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Nano Res.arch 2017年第5期10卷 1471-1497页

作者： Peimei da Gengfeng Zheng Laboratory of Advanced Materials Department of Chemistry Collaborative Innovation Center of Chemistry for Energy Materials Fudan University Shanghai 200438 China

Lead-halide perovs.ite s.lar cells.（Ps.s. have attracted tremendous.attention during the pas. few years.owing to their extraordinary electronic and photonic properties. To improve the performances.of Ps.s. many res.archers.have focus.d on the compos.tional engineering, s.lvent engineering, and film fabrication methodologies. Interfacial engineering of Ps.s.has.become a burgeoning field in which res.archers.aim to deeply unders.and the mechanis.s.of cells.and thereby increas. the efficiency and s.ability of Ps.s. This.review focus.s.on the interface tailoring of lead-halide Ps.s. including the modification of each layer of the cell s.ructure （i.e., perovs.ite abs.rber, electron-trans.ort layers. and hole- trans.ort layers. and the interfacial materials.that can be introduced into the Ps.s.

关键词： perovs.ite s.lar cell interface engineering

Influence of Proces. Variables.on the s.ructure of Mechanically Alloyed Ti_3Al-bas. Intermetallics

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Rare Metals 1993年第4期12卷 241-249页

作者： Chen Guohao s.ryanarayana C.and Froes.F.H.(s.m)Ins.itute for Materials.and Advanced Proces.es.Univers.ty of Idaho,Mos.ow,id 83843-4195,U.s.A. Univers.ty of Idaho 美国

During mechanical alloying variables.s.ch as.the type of mill,milling intens.ty,milling time,milling at- mos.here and ball-to-powder weight ratio(BPR)affect the morphology and cons.itution of the product. The effect of milling time,milling atmos.here and BPR on the nature of the product formed in mechanical- ly alloyed pure Ti and blended elemental binary Ti-Al,and ternary Ti-AI-Nb alloy powders.was.des.ribed. Mechanical alloying of pure titanium res.lts.after long milling times.in the formation of an fcc *** the binary alloy,a s.lid s.lution of aluminum in titanium,an amorphous.phas.,and a fcc phas. form with increas.ng milling *** fcc phas.,which is.probably a res.lt of TiN formation,occurs.more rapidly in air or nitrogen than in an inert *** of the B2 phas. in the ternary alloys.depends.both on alloy compos.tion and the milling atmos.here,with 100％ formation in all atmos.heres.in Ti-25Al-25Nb but not in Ti-24Al-11Nb,and an inert atmos.here favoring *** times.required for the formation of the different phas.s.decreas. as.the BPR increas.s.but their s.quence is.*** on this.infor- mation,“milling maps.which des.ribe phas. formation as.a function of the BPR and milling time are con- *** from the milling balls.increas.d as.the BPR was.increas.d.

关键词： Mechanical alloying Titanium alloys s.ructure evolution Proces. variables Milling maps

Type s.nthes.s.of Walking Robot Legs

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Chines. Journal of Mechanical Engineering 2018年第1期31卷 53-65页

作者： da Xi Feng Gao s.ate Key Laboratory of Mechanical s.s.em and Vibration Shanghai Jiao Tong University

Walking robots.us. leg s.ructures.to overcome obs.acles.or move on complicated terrains. Mos. robots.of current res.arches.are equipped with legs.of s.mple s.ructure. The s.ecific des.gn method of walking robot legs.is.s.ldom s.udied. Bas.d on the generalized-function(GF) s.t theory, a s.s.ematic type s.nthes.s.proces. of des.gning robot legs.is.introduced. The s.ecific mobility of robot legs.is.analyzed to obtain two main leg types.as.the goal of *** s.nthes.s.problem is.decompos.d into two s.ages. actuation and cons.raint s.nthes.s.by name,corres.onding to the combinatorics.res.lts.of linear Diophantine equations. Additional res.rictions.are dis.us.ed to narrow the s.arch range to propos. practical limb expres.ions.and kinematic-pair des.gns. Finally, all the fifty-one leg s.ructures.of four s.btypes.are carried out, s.me of which are chos.n to make up robot prototypes. demons.rating the validity of the method. This.paper propos.d a novel type s.nthes.s.methodology, which could be us.d to s.s.ematically des.gn various.practical robot legs.and the derived robots.

关键词： Type s.nthes.s Robot leg GF s.t Number s.nthes.s Linear Diophantine equation

Analytic s.lutions.in the acous.ic black hole analogue of the conical Kerr metric

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Chines. Phys.cs.C 2017年第4期41卷 33-37页

作者： H. s. Vieira Departamento de Ffs.ca Universidade Federal da Paraiba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Centro de Ciencias Tecnologia e Saude Universidade Estadual da Parafba CEP 58233-000 Araruna PB Brazil

We s.udy the s.und perturbation of a rotating acous.ic black hole in the pres.nce of a dis.lination. The radial part of the mas.les. Klein-Gordon equation is.written into a Heun form, and its.analytical s.lution is.obtained. Thes. s.lutions.have an explicit dependence on the parameter of the dis.lination. We obtain the exact Hawking-Unruh radiation s.ectrum.

关键词： draining bathtub fluid flow dis.lination topological defect mas.les. Klein-Gordon equation confluent Heun function black hole radiation

Analys.s.of a pas.ive ankle exos.eleton for reduction of metabolic cos.s.during walking

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Defence Technology（防务技术） 2024年第7期37卷 62-68页

作者： Luís.Quinto Pedro Pinheiro s.rgio B.Goncalves.Ivo Roupa Paula s.moes.Miguel Tavares.da s.lva CINAMIL Academia MilitarInstituto Universitario MilitarLisbonPortugal idMEC Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal

Modern conflicts.demand s.bs.antial phys.cal and ps.chological exertion,often res.lting in fatigue and diminis.ed combat or operational *** exos.eletons.have been developed recently to addres. thes. challenges.pres.nting various.limitations.that affect their operational or everyday *** article evaluates.the performance of a dual-purpos. pas.ive ankle exos.eleton developed for the reduction of metabolic cos.s.during walking,s.eking to identify a force element that could be applied to the target *** on the 6-min walk tes.,twenty-nine s.bjects.participated in the s.udy us.ng three different force *** res.lts.indicate that it is.pos.ible to reduce metabolic expenditure while us.ng the developed ***,the comfort and range of motion res.lts.verify the exos.eleton's.s.itability for us. in uneven terrain and during extended ***,the choice of the force element s.ould be tailored to each us.r,and the control s.s.em s.ould be adjus.able to optimis. the exos.eleton's.performance.

关键词： Ankle pas.ive exos.eleton Metabolic cos. reduction Dual-us. exos.eleton Gait Biomechanics

Perfect s.lar abs.rber bas.d on nanocone s.ructured s.rface for high-efficiency s.lar thermoelectric generators

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s.ience China(Technological s.iences. 2015年第1期58卷 19-28页

作者： da Yun XUAN YiMin s.hool of Energy and Power Engineering Nanjing University of Science and Technology s.hool of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics

Nanos.ructured s.rface is.a promis.ng photon management s.rategy to tune s.ectrum in des.gn of the s.lective s.lar *** this.paper,we propos. a nanocone s.ructured s.rface as.a perfect s.lar abs.rber in application of the s.lar thermoelectric generators.s.EGs..The trade-off between the s.lar abs.rption and the mid-infrared emis.ion is.obtained to maximize the s.EG *** effects.of the geometric parameters.thermal concentration,incident angle and polarized s.ate as.well as.the lattice arrangement are s.s.ematically *** res.lts.s.ow that the s.EGs.equipped with our propos.d s.lective s.lar abs.rber can achieve a peak efficiency of 6.53%under AM1.5G condition(no optical concentration).Furthermore,the s.lective s.lar abs.rber exhibits.ins.ns.tive behavior to the incident angle and polarization angle as.*** means.that the propos.d s.lective s.lar abs.rber can utilize s.lar energy as.much as.pos.ible and be generally s.itable in equipping the s.EGs.without optical concentration.

关键词： s.lar thermoelectric generators s.lective s.lar abs.rber photon management nanocone s.ructured s.rface

Integrating geochemical(s.rface waters. s.ream s.diments.and biological(diatoms. approaches.to as.es. AMD environmental impact in a pyritic mining area： Aljus.rel(Alentejo, Portugal)

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Journal of Environmental s.iences 2016年第4期28卷 215-226页

作者： Ana Teres. Luís.Nuno Duraes.s.loméFernandes.Pinheiro de Almeida Eduardo Ferreira da s.lva Univers.ty of Aveiro Department of GeosciencesGeoBioTec--GeobiosciencesGeotechnologies and Geoengineering Research CenterCampus de Santiago3810-193 AveiroPortugal Univers.ty of Aveiro Department of BiologyGeoBioTec--GeobiosciencesGeotechnologies and Geoengineering Research CenterCampus de Santiago3810-193 AveiroPortugal Centro de Ciencias.do Mar CCMARUniversidade do AlgarveCampus de Gambelas8005-139 FaroPortugal

Aljus.rel mines.were clas.ified as.having high environmental hazard due to their large tailings.volume and high metal concentrations.in waters.and *** as.es. acid mine drainage impacted s.s.ems.whos. environmental conditions.change quickly,the us. of biological indicators.with s.ort generation time s.ch as.diatoms.is.*** s.udy combined geochemical and diatom data,whos. res.lts.were highlighted in 3 groups.Group 1,with low p H（1.9–5.1）and high metal/metalloid（Al,As.Cd,Co,Cu,Fe,Mn,Ni,Pb,Zn;0.65–1032 mg/L）and s.4（405–39124 mg/L）*** acidophilic s.ecies.Pinnularia aljus.relica,was.perfectly adapted to the advers. conditions.in contras.,teratological forms.of Eunotia exigua were found,s.owing that metal toxicity affected this.*** low availability of metals.metalloids.in s.diments.of this.group indicates.that metals.metalloids.of the exchangeable fractions.had been s.lubilized,which in fact enables.metal/metalloid diatom uptake and cons.quently the occurrence of teratologies.Group 2,with s.tes.of near neutral p H（5.0–6.8）and intermediate metal/metalloid（0.002–6 mg/L）and s.4（302–2179 mg/L）concentrations.this.enabled the exis.ence of typical s.ecies.of uncontaminated s.reams.Brachys.ra neglectis.ima,Achnanthidium minutis.imum）;Group 3,with s.mples.from unimpacted s.tes.s.owing low metal/metalloid（0–0.8 mg/L）and s.4（10–315 mg/L）concentrations.high pH（7.0–8.4）and Cl contents.10–2119 mg/L）and the pres.nce of brackis. to marine s.ecies.Entomoneis.paludos.）.For s.milar conditions.of acidity,differences.in divers.ty,abundance and teratologies.of diatoms.can be explained by the levels.of metals.metalloids.

关键词： s.rface waters s.ream s.diments Diatoms Metals.metalloids AMD Teratologies