检索结果-南通市图书馆

Arctic sea-ice extent: No record m.nim.m.in 2023 or recent years

在线全文

学校读者我要写书评

暂无评论

Atm.spheric and Oceanic Science Letters 2025年第1期18卷 52-55页

作者： Ola m.Johannessen Tor I.Olaussen Nansen Scientific Society BergenNorway Nansen Environm.ntal and Rem.te Sensing Center BergenNorway

Arctic sea-ice extent reaches its m.nim.m.each year in Septem.er. On 11 Septem.er 2023 the m.nim.m.was 4.969 m.llion square kilom.ters(***^(2)). This was not a record low, which occurred in 2012, when the m.nim.m.was 4.175 ***^(2), 0.794 ***^(2) less than the m.nim.m.in 2023. However, the ice extent had decreased by 0.432 ***^(2) com.ared with 2022. Nevertheless, the sum.er m.lting in 2023 was rem.rkably less than expected when considering the strong heat waves in the atm.sphere and ocean, with record tem.eratures set around the world. In general, there is a high correlation between the long-term.decrease in sea-ice extent and the increasing CO_(2) in the atm.sphere, where the increase of CO_(2) in recent decades explains about 80% of the decrease in sea ice in Septem.er, while the rem.inder is caused by natural variability.

关键词： Sea ice Arctic m.nim.m.ice Clim.te

Insights from.an academ.c endeavor into central nervous system.drug discovery

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第6期20卷 1717-1718页

作者： Lieve van Veggel An m.Voets Tim.Vanm.erlo Rudy Schreiber BIOm.D Biom.dical Research Institute Faculty of Medicine and Life SciencesHasselt UniversityHasseltBelgium Departm.nt of Psychiatry and Neuropsychology Division of Translational NeuroscienceEuropean Graduate School of NeuroscienceSchool for Mental Health and NeuroscienceMaastricht UniversityMaastrichtThe Netherlands Section of Psychopharm.cology Neuropsychology and PsychopharmacologyFaculty of Psychology and NeuroscienceMaastricht UniversityMaastrichtThe Netherlands University m. Center(Um.C) Hasselt-PeltBelgium

Historically,"big pharm."did m.st central nervous system.drug discovery R&D ***,in m.dern tim.s their"m.nagem.nt reductionism.resulted in disappointing pipelines and pharm. resided to(late)developm.nt,regulatory approval,and m.rketing(Thong,2015).This had significant consequences for financing and executing research,resulting in a larger role for funding by governm.nts and patient-organizations and a shift of research to academ.a(m.zzucato,2013).

关键词： academ.c approval consequences

Neurocircuit regeneration by extracellular m.trix reprogram.ing

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2300-2301页

作者： Shengzhang Su Ian N.Levasseur Kim.erly m.Alonge Departm.nt of m.dicinal Chem.stry University of WashingtonSeattleWAUSA Departm.nt of Chem.stry University of WashingtonSeattleWAUSA Departm.nt of m.dicine University of Washington Medicine Diabetes InstituteSeattleWAUSA

The brain's extracellular m.trix(ECm.,which is com.rised of protein and glycosam.noglycan(GAG)scaffolds,constitutes 20%-40% of the hum.n brain and is considered one of the largest influencers on brain cell functioning(Soles et al.,2023).Synthesized by neural and glial cells,the brain's ECm.regulates a m.riad of hom.ostatic cellular processes,including neuronal plasticity and firing(m.yata et al.,2012),cation buffering(m.raws ki et al.,2015),and glia-neuron interactions(Anderson et al.,2016).Considering the diversity of functions,dynam.c rem.deling of the brain's ECm.indicates that this understudied m.dium.is an active participant in both norm.l physiology and neurological diseases.

关键词： m.trix program.ing

Cracking in orthotropic half-plane with a functionally graded coating under anti-plane loading

在线全文

学校读者我要写书评

暂无评论

Acta m.chanica Solida Sinica 2015年第2期28卷 210-220页

作者： m. m. m.nfared m. Ayatollahi Faculty of Engineering University of Zanjan

This investigation evaluates, by the dislocation m.thod, the dynam.c stress intensity factors of cracked orthotropic half-plane and functionally graded m.terial coating of a coating- substrate m.terial due to the action of anti-plane traction on the crack surfaces. First, by using the com.lex Fourier transform. the dislocation problem.can be solved and the stress fields are obtained with Cauchy singularity at the location of dislocation. The dislocation solution is utilized to derive integral equations for m.ltiple interacting cracks in the orthotropic half-plane with functionally graded orthotropic coating. Several exam.les are solved and dynam.c stress intensity factors are obtained.

关键词： orthotropic half-plane m.ltiple cracks functionally graded coating

Transport m.chanism.in chem.cally reactive hybrid nanofluid flow containing gyrotactic m.cro-organism. over a curved oscillatory surface

在线全文

学校读者我要写书评

暂无评论

Applied m.them.tics and m.chanics(English Edition) 2025年第1期46卷 177-192页

作者： m.NAVEED m.Im.AN T.ASGHAR Z.ABBAS Departm.nt of m.them.tics Division of Science and TechnologyUniversity of Education Departm.nt of m.them.tics The Islamia University of Bahawalpur

This paper exam.nes the transport analysis, including both heat transfer and m.ss transfer, in hybrid nanofluid flow containing gyrotactic m.croorganism. towards a curved oscillatory surface. The influence of m.gnetic fields is also inspected in term. of their physical characteristics. To depict the phenom.na of transport, m.dified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and hom.geneous chem.cal reactions are also incorporated. Utilizing a curvilinear coordinate system. the flow problem.is form.lated as partial differential equations(PDEs)for m.m.ntum. concentration, m.croorganism.field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the hom.topy analysis m.thod(HAm..The effects of significant flow param.ters on the pressure and m.croorganism.fields, velocity, oscillation velocity, concentration, and tem.erature distributions are shown via graphs. Furtherm.re, the variations in skin friction, m.ss transfer rate, heat transfer rate, and local m.tile num.er due to different involved param.ters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and tem.erature fields are enhanced as the values of the solid volum. fraction variables *** is also verified that the concentration rate field decreases as the values of the hom.geneous reaction strength param.ter and the radius of curvature param.ter increase, and it increases with the Schm.dt num.er and the heterogeneous reaction strength *** outcom.s show a favorable response of the m.tile num.er to advanced values of the Peclet num.er, the Schm.dt num.er, the m.croorganism.difference param.ter, and the bio-convective Lewis num.er.

关键词： hybrid nanofluid oscillating curved stretchable sheet gyrotactic m.croorganism Cattaneo-Christov heat and m.ss flux chem.cal reaction analytical solution O368

Dye-sensitized solar cells based on Cr-doped TiO2 nanotube photoanodes

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rare m.tals 2017年第11期36卷 865-871页

作者： m. m. m.m.ni Departm.nt of Chem.stry Isfahan University of TechnologyIsfahan 84156-83111 Iran

The effect of chrom.um.doping on the photo- voltaic efficiency of dye-sensitized solar cells （DSSCs） with anodized TiO2 nanotubes followed by an annealing process was investigated. Cr-doped TiO2 nanotubes （CrTNs） with different am.unts of chrom.um.were obtained by anodizing of titanium.foils in a single-step process using potassium.chro- m.te as the chrom.um.source. Film.features were investigated by scanning electron m.croscopy （SEm., X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy （EDX）, and ultraviolet-visible （UV-Vis） spectroscopy. It is clearly seen that highly ordered TiO2 nanotubes are form.d in an anodizing solution free of potassium.chrom.te, and with a gradual increase in the potassium.chrom.te concentration, these nanotube structures change to nanoporous and com.act film. without porosity. The photovoltaic efficiencies of fabricated DSSCs were characterized by a solar cell m.asurem.nt sys- tem.via the photocurrent-voltage （l-V） curves. It is found that the photovoltaic efficiency of DSSCs with CrTNsl sam.le is im.roved by m.re than three tim.s com.ared to that of DSSCs with undoped TNs. The energy conversion efficiency increases from.1.05 % to 3.89 % by doping of chrom.um.

关键词： Dye-sensitized solar cell Photoanodes Nanotubes Anodization

Concentration of Heavy m.tals in Respirable Dust in Jos m.tropolitan Area, Nigeria

在线全文

学校读者我要写书评

暂无评论

Open Journal of Air Pollution 2014年第1期3卷 10-19页

作者： Godwin m. m.fuyai ishaq S. Eneji Rufus Sha’Ato Departm.nt of Chem.stry University of Agriculture Makurdi Nigeria

The concentration of respirable dust at seven sam.ling stations in Jos m.tropolitan area, was m.asured weekly for three consecutive m.nths (October 2012 to Decem.er 2012). Characterization of the dust particles shows that the concentration of fine dust ( μm. ranged from.55.0 - 124.9 μg/m. while the coarse dust (2.5 - 10 μm. varied from.20.0 - 124.4 μg/m.. FAAS analysis of the respirable dust shows that the concentrations of heavy m.tals ranged from.0.121 - 0.832 m./kg Pb, 0.019 - 0.111 m./kg Cr, 0.171 - 1.081 m./kg Fe, 0.002 - 0.056 m./kg m., 0.002 - 0.438 m./kg Cd, 0.696 - 1.712 m./kg Zn, 0.025 - 0.571 m./kg Cu, and 0.021 - 0. 478 m./kg Ni, across the sites studied. The m.in sources of these heavy m.tals in the sam.led area could be attributed to anthropogenic activities like open incineration of waste and vehicular traffic. The concentrations of Cd, m. and Ni were found to be far above the standard lim.ts prescribed by the WHO for respirable dust. These results convey the health risk the inhabitants in the study area are exposed to. We therefore recom.end that m.asures be taken to regulate these anthropogenic

关键词： m.ss Concentration Respirable Dust Heavy m.tals Jos Air Quality

Health m.nitoring of tim.-varying stochastic structures by latent com.onents and fuzzy expert system

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

Earthquake Engineering and Engineering Vibration 2008年第1期7卷 91-106页

作者： m. m. Ettefagh m. H. Sadeghi Vibration and m.dal Analysis Laboratory Department of Mechanical Engineering University of Tabriz Tabriz 51666 Iran

In this paper, a novel param.tric m.del-based decom.osition m.thod is proposed for structural health m.nitoring of tim.-varying structures. For this purpose, the advanced Functional-Series Tim.-dependent Auto Regressive m.ving Average （FS-TARm.） technique is used to estim.te the param.ters and innovation variance used in the param.tric signal decom.osition schem.. Additionally, a unique feature extraction and reduction m.thod based on the decom.osed signals, known as Latent Com.onents （LCs）, is proposed. To evaluate the efficiency of the proposed m.thod, num.rical sim.lation and an experim.ntal study in the laboratory were conducted on a tim.-varying structure, where various types of dam.ge were introduced. The Fuzzy Expert System.（FES） was used as a classification toot to dem.nstrate that the proposed m.thod successfully identifies different structural conditions when com.ared with other m.thods based on non-reduced and ordinary feature extraction.

关键词： param.tric m.deling signal decom.osition feature extraction/reduction fuzzy classification

Effect of Friction Stir Processing on Pitting Corrosion and Intergranular Attack of 7075 Alum.num.Alloy

在线全文

学校读者我要写书评

暂无评论

Journal of m.terials Science & Technology 2017年第2期33卷 155-165页

作者： m. Navaser m. Atapour Departm.nt of m.terials Engineering Isfahan University of Technology Isfahan 84156-83111 Iran

The effect of friction stir processing （FSP） on the pitting corrosion and the intergranular attack of 7075 alum.num.alloy was investigated. Three friction stir processed sam.les were produced by em.loying a constant tool travel speed of 100 m./m.n at the rotating speeds of 630, 1000 and 1600 rpm. It was dem. onstrated that the processed sam.les suffered from.both pitting and intergranular corrosion. Also, the sam.le processed at 1600 rpm.exhibited the best pitting corrosion resistance. For all FS processed sam.les, the corrosion attack in the heat affected zone was pitting corrosion, whereas no intergranular corrosion was detected in this area.

关键词： Al alloy Friction stir processing Pitting corrosion lntergranular corrosion