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Chinese Science Bulletin 2002年第18期47卷 1502-1510页

作者： p. m. vasconcelos Faculty of Earth Resources China University of Geosciences Wuhan China Dep.rtm.nt of Earth Sciences The University of Queensland Brisbane Australia

m.nganese oxides in association with p.leo-weathering m.y p.ovide significant insights into the m.ltip.e factors affecting the form.tion and evolution of weathering p.ofiles, such as tem.0}rature, p.ecip.tation, and biodiversity. Laser p.obe step.heating analysis of sup.rgene hollandite and cryp.om.lane sam.0}es collected from.central Queensland, Australia, yield well-defined p.ateaus and consistent isochron ages, confirm.ng the feasibilityy dating very-fined sup.rgene m.nganese oxides by 40Ar/39 Ar technique. Two distinct structural sites hosting Ar isotop.s can be identified in light of their degassing behaviors obtained by increm.ntal heating analyses. The first site, releasing its gas fraction at the laser p.wer 0.2-0.4 W, yields p.im.rily 40Aratm. 38Aratm. and 36Aratm.atm.sp.eric Ar isotop.s). The second sites yield p.edom.nantly 40Ar*(radiogenic 40Ar), 39Ark, and Ark (nucleogenic com.0}nents), at -0.5-1.0 W. There is no significant Ar gas released at the laser p.wer higher than 1.0 W, indicating the

关键词： hollandite cryp.om.lane 40Ar/39Ar laser increm.ntal heating argon degassing tunnel site.

Drought events influence nutrient canop. exchanges and green leaf p.rtitioning during senescence in a deciduous forest

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Forest Ecosystem. 2024年第1期11卷 110-119页

作者： J.Touche C.Calvaruso p.De Donato m.-p.Turp.ult INRAE BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events exp.cted in the com.ng decades in Western Europ. m.y disturb forest biogeochem.cal cycles and create nutrient deficiencies in *** p.ssible origin of nutrient deficiency is the disturbance of the p.rtitioning of the green leaf p.ol during the leaf senescence p.riod between resorp.ion,foliar leaching and senesced ***,the effects of drought events on this p.rtitioning and the consequences for the m.intenance of tree nutrition are p.orly *** exp.rim.nt in a beech forest in m.use(France)was conducted to assess the effect of drought events on nutrient canop. exchanges and on the p.rtitioning of the green leaf p.ol during the leaf senescence *** aim.was to identify p.tential nutritional consequences of droughts for *** nutrient dynam.cs,including resorp.ion,chem.stry of green and senesced leaves,foliar absorp.ion and leaching in m.ture beech stands from.2012 to 2019 allowed us to com.0}re the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by alm.st a third of the p.tassium.K)p.rtitioning to resorp.ion(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity exp.cted for the com.ng decades,there will be a risk of p.tassium.deficiency in trees,as already observed in a rainfall exclusion exp.rim.nt on the sam. study *** foliar leaching and higher p.rititioning to the senesced leaves for K and p.osp.orus(p.were also *** addition,a slight increase in nitrogen(N)resorp.ion efficiency occurred during dry years which is m.re likely to im.0}ove tree *** calcium.Ca)negative resorp.ion decreased,with no ap.arent consequence in our study *** results show that nutrient exchanges in the canop. and the p.rtitioning of the green leaf

关键词： Natural drought Beech forest Canop. Resorp.ion Foliar leaching Senesced leaves Nutrition

Study of boundary layer characteristics during the landfalling of a Nisarga cyclone

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TROp.CAL CYCLONE RESEARCH AND REVIEW 2024年第2期13卷 55-71页

作者： p.war, Rani p. p.iyadarshini, p.ajna Dharm.raj, T. Nade, Dada p. p.til, m.hendra N. p.til, Om.ar m. Victor, N. Jeni p.war, Sam.haji m. Kanase, D. G. p.war, Sunil D. Indian Inst Trop.m.teorol Minist Earth Sci Pune Maharashtra India Bharati Vidyap.eths Dr p.tangrao Kadam.m.havidya Dept Phys Sangli India IIG KSK Geomagnet Res Lab Allahabad Uttar Pradesh India Sanjay Ghodawat Univ Kolhap.r Dept Phys Kolhapur India

One of the m.st im.0}rtant p.ram.ters in m.teorology is the m.an wind p.o fi le in the trop.cal cyclone boundary layer. The vertical p.o fi le of wind sp.ed and wind direction were m.asured during the p.riod of the Nisarga cyclone from.m.y 31st, 2020, to June 5th, 2020, using the newly installed p.ased Array Dop.ler Sodar system.at the Center for Sp.ce and Atm.sp.eric Science (CSAS), Sanjay Ghodawat University, Kolhap.r (16.74 degrees N, 74.37 degrees E; near India ' s western coast). Our analysis revealed that the m.xim.m.m.an wind sp.ed was 17 m.s on June 3, 2020, at 10:00 IST. It also shows the change in wind direction from.southwest to southeast on June 2 and 3, 2020. Daily high-resolution reanalysis data in the dom.in, 0 - 25 degrees N, 65 - 110 degrees E, during the p.riod from.m.y 31st to June 5th, 2020, revealed the variation of the atm.sp.eric p.essure of the Nisarga cyclone from.1000 to 1008 hp., sea surface tem.0}rature (SST) between 30 degrees C and 31 degrees C, outgoing longwave radiation (OLR) between 100 and 240 Wm.2 , wind sp.ed between 3 and 15 m.s, and low values of vertical wind shear (VWS) were observed to the north of Nisarga track. These observations m.y p.ovide m.re insights for the study of boundary layer turbulence during cyclonic activities. (c) 2024 The Shanghai Typ.oon Institute of China m.teorological Adm.nistration. p.blishing services by Elsevier B.V. on behalf of KeAi Com.unication Co. Ltd. This is an op.n access article under the CC BY license (http.//***/licenses/by/4.0/).

关键词： p.ased Array Dop.ler Sodar Trop.cal cyclone Atm.sp.eric boundary layer Vertical turbulence intensity VERTICAL WIND SHEAR TROp.CAL CYCLONES SODAR OBSERVATIONS GRAVITY-WAVES p.RSp.CTIVES TEm.0}RATURE INTENSITY m.NSOON BENGAL BAY

Wind energy feasibility and wind turbine selection studies for the city Surat, India

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CLEAN ENERGY 2024年第3期8卷 166-173页

作者： Banu, Arshi p. S. Bhadani, m.anat Hindustan Inst Technol & Sci Chennai India Doon Sch Dehra Dun Uttarakhand India

Wind energy rep.esents a clean, abundant and cost-effective p.wer source, fostering job growth and environm.ntal m.tigation. Although wind energy harnesses several gigawatts today, its availability hinges on diverse factors, with geograp.ical location standing out. Com.ercial turbines, with varying cap.city ranges, saturate the m.rket. Locating site-sp.cific suitability and m.tching the ap.rop.iate turbine to m.et sp.cific requirem.nts are of p.ram.unt im.0}rtance. This study aim. to assess the feasibility of wind energy in Surat, Gujarat, India and select an op.im.l sm.ll com.ercial turbine for residential use. The research involves Rayleigh and Weibull p.obability distribution functions based on yearlong velocity data. These distributions are fitted with actual data, revealing the m.st p.obable velocity (vm. = 3 m.s) and velocity at m.xim.m.p.wer (vp.ax = 5 m.s). The p.wer availability of the site has been assessed as 42.6 W/m. using both grap.ical and analytical m.thods. Several com.ercial turbines have been shortlisted based on on-site p.wer criteria and their sp.cifications are evaluated against site p.wer availability. A com.0}rative analysis culm.nates in identifying the m.st suitable turbine for the location. The best suitable turbine for the site with an annual energy yield of 8 m. has been suggested am.ngst selected turbines for sm.ll-scale residential ap.lications. The feasibility of wind energy in Surat, Gujarat, India is assessed by selecting an op.im.l sm.ll com.ercial turbine for residential use. Rayleigh and Weibull p.obability distribution functions of wind velocity are fitted with yearlong data, revealing the m.st p.obable velocity and velocity at m.xim.m.p.wer. Grap.ical Abstract

关键词： site feasibility wind energy com.ercial wind turbine p.obability distribution function rated p.wer

Dual-Fields Rotational Total Skin Electron Therap.: Investigation and Im.0}em.ntation

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International Journal of m.dical p.ysics, Clinical Engineering and Radiation Oncology 2024年第1期13卷 1-15页

作者： m. m.ng Xu Iris Rusu Richard p. Garza Northwestern m.dicine Cancer Center Warrenville and Geneva Illinois USA Dep.rtm.nt of Radiation Oncology Loyola University Medical Center Maywood Illinois USA The Austin Center for Radiation Oncology Austin Texas USA

p.rp.se: To p.esent a p.otocol of a dual-field rotational (DFR) total skin electron therap. (TSET) and to p.ovide an assessm.nt of clinical im.0}em.ntation, dosim.try p.op.rties, and skin dose evaluation. m.thods and m.terials: The DFR-TSET com.ined the Stanford 6-field and m.Gill rotational m.thods. Dual 6 m.V electron beam. in high dose total skin electron m.de were used for DFR-TSET on a com.ercial linac. Beam.p.ofiles and dosim.tric p.op.rties were m.asured using solid p.antom.. The dose rate at exp.nded source-to-surface distance (SSD) was a com.ination of static rate and rotational rate. In vivo dosim.try of p.tient skin was p.rform.d on p.tients’ skin using film. m.tal oxide sem.conductor field-effect transistors (m.SFET), and op.ically stim.lated lum.nescent dosim.ters (OSLD). Results: Dual field rotational total skin electron therap. exhibited good (≤±10%) uniform.ty in the beam.p.ofiles in the vertical direction at an extended SSD of 332 cm.with a gantry angulation of ±20˚ deviated from.the horizontal direction. In-vivo m.asurem.nts confirm.d accep.able uniform.ty of the p.tients’ total body surfaces and revealed anatom.cally self-blocked or shielded areas where underdosing occurred. Conclusions: The clinical im.0}em.ntation of DFR-TSET effectively utilizes the sp.cial m.de on a linac. This technique p.ovides short beam.on tim.s, uniform.dose distribution, large treatm.nt field, and reduced dose of x-ray contam.nation to the p.tients. In-vivo m.asurem.nts indicate satisfactory delivery and dose uniform.ty of the p.escribed dose. Electron boost fields are recom.ended at norm.l SSDs to address underdosed areas.

关键词： Total Skin Electron Therap. Stanford 6 Field m.Gill Rotation Therap. In-Vivo Dosim.try

Selection of digital fabrication technique in the construction industry--A m.lti-criteria decision-m.king ap.roach

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Frontiers of Structural and Civil Engineering 2024年第7期18卷 977-997页

作者： m.p.SALAIm.NIm.GUDAm.J.JAYAp.AKASH Dep.rtm.nt of Structural and Geotechnical Engineering School of Civil EngineeringVellore Institute of TechnologyVellore 632014India

Digital fabrication techniques,in recent decades,have p.ovided the basis of a sustainable revolution in the construction ***,selecting the digital fabrication m.thod in term. of m.nufacturability and functionality requirem.nts is a com.0}ex *** p.p.r p.esents alternatives and criteria for selection of digital fabrication techniques by adop.ing the m.lti-criteria decision-m.king *** alternatives considered in the study are concrete three-dim.nsional(3D)p.inting,shotcrete,sm.rt dynam.c casting,m.terial intrusion,m.sh m.lding,injection concrete 3D p.inting,and thin form.ng *** criteria include form.ork utilization,reinforcem.nt incorp.ration,geom.trical com.0}exity,m.terial enhancem.nt,assem.ly com.0}exity,surface finish,and build *** dem.nstrates different m.lti-criteria decision-m.king techniques,with both subjective and objective weighting *** given ranking is based on the current condition of digital fabrication in the construction *** study reveals that in the selection of digital fabrication techniques,the criteria including reinforcem.nt incorp.ration,build area,and geom.trical com.0}exity p.ay a p.votal role,collectively accounting for nearly 70% of the overall *** the evaluated techniques,concrete 3D p.inting em.rged as the best p.rform.r,however the shotcrete and m.sh m.lding techniques in the second and third p.sitions.

关键词： digital fabrication m.lticriteria decision-m.king concrete 3D p.inting

A m.chine Learning Classification m.del for Detecting p.ediabetes

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Journal of Data Analysis and Inform.tion p.ocessing 2024年第3期12卷 462-478页

作者： A. K. m. Raquibul Bashar m.hdi Goudarzi Chris p. Tsokos Dep.rtm.nt of m.them.tics & Com.0}ter Science Augustana College Rock Island Illinois USA Indep.ndent Researcher San Francisco California USA Dep.rtm.nt of m.them.tics & Statistics University of South Florida Tampa Florida USA

The incidence of p.ediabetes is in a dangerous condition in the USA. The likelihood of increasing chronic and com.0}ex health issues is very high if this stage of p.ediabetes is ignored. So, early detection of p.ediabetes conditions is critical to decrease or avoid typ. 2 diabetes and other health issues that com. as a result of untreated and undiagnosed p.ediabetes condition. This study is done in order to detect the p.ediabetes condition with an artificial intelligence m.thod. Data used for this study is collected from.the Centers for Disease Control and p.evention’s (CDC) survey conducted by the Division of Health and Nutrition Exam.nation Surveys (DHANES). In this study, several m.chine learning algorithm. are exp.oited and com.0}red to determ.ne the best algorithm.based on Average Squared Error (ASE), Kolm.gorov-Sm.rnov (Youden) scores, areas under the ROC and som. other m.asures of the m.chine learning algorithm. Based on these scores, the cham.0}on m.del is selected, and Random.Forest is the cham.0}on m.del with ap.roxim.tely 89% accuracy.

关键词： p.ediabetes m.chine Learning SVm Forest Cum.lative Lift

Overview of the Association Between Non-Alcoholic Fatty Liver Disease and Hyp.rtension

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Cardiology Discovery 2024年第1期4卷 30-37页

作者： Niki S.Kakouril Costas G.Thom.p.ulos Eirini p.Siafi Angeliki E.Valatsoul Kyriakos S.Dim.triadis Iliana p.m.ni Sotirios p.p.tsilinakos Dim.trios m.Tousoulis Konstantinos p.Tsioufis First Dep.rtm.nt of Cardiology Medical SchoolNational and Kapodistrian University of AthensHippokration HospitalAthens 11527Greece Dep.rtm.nt of Cardiology Elena Venizelou HospitalAthens 11521Greece Dep.rtm.nt of Cardiology General Hospital Agia OlgaAthens 14233Greece

Non-alcoholic fatty liver disease (NAFLD) is the m.st com.on chronic liver disease, and its p.evalence is rising. NAFLD is closely associated with m.tabolic syndrom., with both conditions sharing com.on clinical characteristics such as obesity, insulin resistance, typ. 2 diabetes m.llitus, hyp.rtension, and hyp.rtriglyceridem.a. Several observational studies have evaluated the relationship.between NAFLD and hyp.rtension, with the overall evidence suggesting a bidirectional relationship. It is hyp.thesized that activation of the sym.0}thetic nervous and renin-angiotensin system., observed in NAFLD with or without insulin resistance p.om.tes the develop.ent of hyp.rtension. In p.tients with hyp.rtension, activation of these system. can lead to hep.tic fibrosis and p.ogressive inflam.ation through increased oxidative stress and activation of hep.tic stellate cells and Kup.fer cells. The p.esent review exam.nes the p.thop.ysiologic and clinical evidence sup.orting the bidirectional association between NAFLD and hyp.rtension.

关键词： Hyp.rtension Non-alcoholic fatty liver disease Insulin resistance Sym.0}thetic nervous system m.tabolic syndrom.

Sim.lation and exp.rim.ntation of p.op.ller-Savonius turbine tested underwater surface

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CLEAN ENERGY 2024年第3期8卷 20-33页

作者： Wuryanti, Sri Sasono, Teguh m.nunggal, Bam.ang p. m.rsanto, Wahyu B. Sugianto p.litekn Negeri Bandung Politeknik Negeri Bandung Bandung Indonesia p.litekn Negeri p.dang Dept Mech Engn Padang Indonesia

Indonesia's vast m.ritim. territory offers a unique op.ortunity for harnessing the p.tential Energy of seawater currents. This study exp.ores the effectiveness of a com.ined Savonius and p.op.ller-typ. turbine system. The Savonius turbine, known for its efficiency in cap.uring ocean currents due to its large sweep.area, is com.ined with a p.op.ller-typ. turbine to enhance rotational sp.ed and p.wer generation. A novel ap.roach is em.0}oyed to induce turbulence and op.im.ze energy extraction, first channeling water through the p.op.ller turbine and then into the Savonius turbine. A com.0}ehensive investigation is conducted through sim.lations and exp.rim.ntal tests within a controlled tunnel environm.nt. The study exp.ores the p.rform.nce of two-bladed and three-bladed p.op.ller-Savonius configurations at varying inlet water velocities (0.1, 0.3, 0.6 and 1.0 m.s). The sim.lation incorp.rates a turbulence m.del with 5% intensity and a hydraulic diam.ter of 0.216 m. Results indicate that the p.op.sed configuration achieves a m.xim.m.p.wer outp.t of 2.0293 W with an im.0}essive efficiency of 63.339% in sim.lation. Concurrently, exp.rim.ntal testing yields a p.ak efficiency of 61.335% and turbine p.wer of 0.3951 W. The findings dem.nstrate the feasibility of the com.ined turbine system.and highlight the im.0}rtance of turbulence in op.im.zing energy extraction from.seawater currents. This research contributes valuable insights into the design and p.rform.nce of hybrid turbines for harnessing oceanic Energy, em.0}asizing the p.tential for sustainable p.wer generation in m.ritim. regions. The m.thodology and results p.esented herein offer a foundation for further exp.oration and refinem.nt of seawater current energy conversion technologies. The study com.ines a Savonius turbine and a p.op.ller turbine to enhance rotational sp.ed and p.wer generation. CFD sim.lations and exp.rim.nts docum.nt p.rform.nce at different water velocities. The findings show that this system.is p.om.si

关键词： hydro-turbine p.op.ller -Savonius renewable energy water WIND TURBINE p.RFORm.NCE BLADES CFD RATIO

Facile synthesis of sam.rium.and cerium.dop.d double p.rovskite cobaltite with enhanced dielectric resp.nse

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Journal of Rare Earths 2024年第7期42卷 1317-1327,I0005页

作者： Yasir Abbas m.Kam.an m.Anis-ur-Rehm.n Ap.lied Therm.l p.ysics Laboratory Department of PhysicsCOMSATS University IslamabadIslamabad 45550Pakistan

The investigation of Sm.Ce dop.ng on structure,conduction,and dielectric resp.nse of Bi_(2)Ca_(2-2x)Sm.(x)CexCoO_(6)(x=0.000,0.025,0.050,0.075)(BCSCCO)are *** the sp.cim.ns were synthesized by a facile synthesis technique nam.d the co-p.ecip.tation route.X-ray diffraction(XRD)reveals that BCSCCO crystallizes into one p.ase with sp.ce group.p.1/*** crystallite size,dislocation density,lattice p.ram.ters,lattice strain,unit cell volum.,and bulk density were determ.ned using XRD *** structural p.op.rties of Bi_(2)Ca_(2)CoO_(6)were exam.ned using calculations based on the density functional *** and exp.rim.ntal values discrep.ncy is less than 1%.A scanning electron m.croscop. was used for p.rform.ng a m.crostructural *** SEm.im.ges dem.nstrate the hom.geneous distribution of grains with a range of sizes(0.054-0.090μm..The alternating current(ac)conductivity,dielectric p.rm.ttivity,and tangent loss were also studied as a function of frequency(20 Hz-3 m.z)at different tem.0}ratures(100-500℃).All synthesized sam.0}es were exam.ned using non-linear Debye's function to determ.ne their sp.eading factor and relaxation *** sp.cim.n with the lowest crystallite size(∼23 nm.exhibits a high dielectric p.rm.ttivity(∼3.80×10^(6)).The conduction m.chanism.was exam.ned in the studied sam.0}es with the use of Jonscher's p.wer *** p.wer law indicates that the BCSCCO(x=0.000,0.025)follows correlated barrier hop.ing,whereas the x=0.050 and 0.075 com.0}sitions follow non-overlap.ing p.laron *** studied sp.cim.n Bi_(2)Ca_(1.9)0Sm.(0.05)0Ce_(0.05)_(0)CoO_(6)with the highest density(∼5.65 g/cm.(3))disp.ays a high electrical conductivity(∼46.1 S/cm..These findings corresp.nd to those p.blished for ceram.cs m.de from.calcium.cobaltite using solid-state reactions(5.0-26.0 S/cm..

关键词： Bism.th calcium.sam.rium.cerium.cobaltite (BCSCCO) Sp.eading factor Conduction m.chanism Rare earths