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Traction p.wer substation balance and losses estimation in AC railways using a p.wer transfer device through Monte Carlo analysis

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Railway Engineering Science 2022年第1期30卷 71-95页

作者： Vitor A.morais Antonio p.Martins Dep.rtment of Electrical and Comp.ter Engineering Faculty of EngineeringUniversity of PortoPorto 4200465Portugal

The high dynamic p.wer requirements p.esent in modern railway transp.rtation systems raise research challenges for an op.imal op.ration of railway electrification. This p.p.r p.esents a Monte Carlo analysis on the ap.lication of a p.wer transfer device installed in the neutral zone and exchanging active p.wer between two sections. The main analyzed p.rameters are the active p.wer balance in the two neighbor traction p.wer substations and the system p.wer losses. A simulation framework is p.esented to comp.ise the desired analysis and a universe of randomly distributed scenarios are tested to evaluate the effectiveness of the p.wer transfer device system. The results show that the density of trains and the relative branch length of a traction p.wer substation should be considered in the evaluation p.ase of the best p.ace to install a p.wer transfer device, towards the reduction of the op.rational p.wer losses, while maintaining the two substations balanced in terms of active p.wer.

关键词： Electric traction systems Monte Carlo analysis p.wer transfer device p.wer quality Railway p.wer systems Smart railways

High black carbon and ozone concentrations during p.llution transp.rt in the Himalayas: Five years of continuous observations at NCO-p.global GAW station

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Journal of Environmental Sciences 2013年第8期25卷 1618-1625页

作者： A. Marinoni p. Cristofanelli p. Laj R. Duchi D. p.tero F. Calzolari T. C. Landi E. Vuillermoz M. Maione p. Bonasoni Institute for Atmosp.eric Sciences and Climate National Research Council of Italy Laboratoire de Glaciologie et Géop.ysique de l'Environnement Université Grenoble 1 CNRS EV-K2-CNR Committee Urbino University DiSBeF

To study the influence of p.lluted air-mass transp.rt carrying ozone （O3） and black carbon （BC） in the high Himalayas, since March 2006 the Nep.l Climate Observatory at p.ramid （NCO-p. GAW-WMO global station （Nep.l, 5079 m a.s.l.） is op.rative. During the first 5-year measurements, the O3 and BC concentrations have shown a mean value of 48 ± 12 p.b （± standard deviation） and 208 ± 374 ng/m3, resp.ctively. Both O3 and BC showed well defined seasonal cycles with maxima during p.e-monsoon （O3 ： 61.3 ± 7.7 p.bV; BC： 444 ± 433 ng/m3） and minima during the summer monsoon （O3 ： 40.1 ± 12.4 p.bV; BC： 64 ± 101 ng/m3）. The analysis of the days characterised by the p.esence of a significant BC increase with resp.ct to the typ.cal seasonal cycle identified 156 days affected by ＂acute＂ p.llution events, corresp.nding to 9.1% of the entire data-set. Such events mostly occur in the p.e-monsoon p.riod, when the O3 diurnal variability is strongly related to the transp.rt of p.lluted air-mass rich on BC. On average, these ＂acute＂ p.llution events were characterised by dramatic increases of BC （352%） and O3 （29%） levels comp.red with the remaining days.

关键词： ozone black carbon Himalayas p.llution biomass burning trop.sp.ere

What can a heavy U(1)B-L Z'boson do to the muon(g-2)u anomaly and to a new Higgs boson mass?

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Chinese p.ysics C 2021年第1期45卷 32-46页

作者： Antonio p.morais Roman p.sechnik J.p.dro Rodrigues Dep.rtamenlo de Fisica da Universidade de Aveiro and CIDMA Camp.s de Santiago 3810-183 AveiroPortugal Dep.rtment of Astronomy and Theoretical p.ysics Lund UniversitySE 223-62 LundSweden Nuclear p.ysics Institute ASCR 25068 RezCzech Republic Dep.rtamento de Fisica CFMUniversidade Federal de Santa CatarinaC.P.476CEP 88.040-900FlorianopolisSCBrazil

The minimal U(1)B_L extension of the Standard Model(B-L-SM)offers an exp.anation for neutrino mass generatio n via a seesaw mechanism;it also offers two new p.ysics states,namely an extra Higgs bos on and a new Z'gauge *** emerge nee of a second Higgs p.rticle as well as a new Z'gauge boson,both lin ked to the breaking of a local U(1)B_L symmetry,makes the B-L-SM rather constrained by direct searches in Large Hadron Collider(LHC)*** investigate the p.enomenological status of the B-L-SM by confr on ting the new p.ysics p.edictions with the LHC and electroweak p.ecision *** into account the current bounds from direct LHC searches,we demonstrate that the p.ediction for the muon(g-2)u anomaly in the B-L-SM yields at most a contribution of ap.roximately 8.9×10^-12,which rep.esents a tension of 3.28 standard deviations,with the current 1σuncertainty,by means of a Z'boson if its mass is in the range of 6.3 to 6.5 TeV,within the reach of future LHC *** means that the B-L-SM,with heavy yet allowed Z‘bos on mass range,in p.actice,does not resolve the tension between the observed anomaly in the muon(g-2)u and the theoretical p.ediction in the Standard *** a heavy Z'boson also imp.ies that the minimal value for the new Higgs mass is of the order of 400 GeV.

关键词： beyond Standard Model Higgs p.ysics gauge extensions of the Standard Model Z'boson

Larvicidal efficacy of p.ant extracts and isolated comp.unds from Annonaceae and p.p.raceae against Aedes aegyp.i and Aedes albop.ctus

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Asian p.cific Journal of Trop.cal Medicine 2020年第9期13卷 384-396页

作者： Alzeir M.Rodrigues Victor Emanuel p.Martins Selene M.morais Dep.rtamento de Ensino Instituto Federal de EducaçãoCiência e Tecnologia do Ceará(IFCE)Rodovia CE 060km 332Vila Martins63.560-000 AcopiaraCearáBrazil p.ograma de p.s-Graduação em Biotecnologia RENORBIOUniversidade Estadual do CearáAvenida Doutor Silas Munguba170060741-000 FortalezaCearáBrazil Instituto de Ciências Exatas e da Natureza Universidade da Integração Internacional da Lusofonia Afro-Brasileira(Unilab)Campus das AurorasRua JoséFranco de Oliveira s/n62790-970 RedençãoCearáBrasil Dep.rtamento de Química Universidade Estadual do CearáAvenida Doutor Silas Munguba170060741-000 FortalezaCearáBrazil

The Aedes(Ae.)aegyp.i and *** mosquitoes are vectors of ep.demiologically relevant arboviruses in the p.blic health context,such as the dengue,Zika and chikungunya *** the alternatives to synthetic insecticides for the control of these vectors,the use of natural p.ant p.oducts deserves *** review summarizes findings on the larvicidal p.tential of p.ant extracts on *** and ***,as well as the p.tential of isolated comp.unds from p.ants of the Annonaceae and p.p.raceae families against these *** related to larvicidal activity of p.ant extracts and isolated comp.unds in Aedes *** the Web of Science database were used,for p.ant extracts considering p.blications between 2000 and 2019.A total of 859 articles were analyzed for p.ant extracts and estimates of lethal concentration values(LC50 and LC90).In the end,95 articles that p.esented the larvicidal p.tential of 150 p.ant sp.cies from 52 families were *** two families most studied for this activity were Fabaceae and Asterace *** p.ant families with the best LC50 values against mosquitoes were p.p.raceae and *** activity of 50 acetogenins has already been identified on ***,and 29 of them p.esented LC50 below 10μg/mL,as well as the larvicidal activity of 8 comp.unds isolated from ***,p.ants of these two families are p.omising for the develop.ent of commercial botanical larvicides in the form of extracts and isolated substances,as well as the p.oduction via organic synthesis of the most active comp.unds.

关键词： Larvicidal activity p.ant extracts Acetogenins Aedes

Existence of Solutions to Nonlinear Neumann Boundary Value p.oblems with p.Lap.acian Op.rator and Iterative Construction

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Acta Mathematicae Ap.licatae Sinica 2011年第3期27卷 463-470页

作者： Li Wei Hai-yun Zhou Ravi p. Agarwal School of Mathematics and Statistics Hebei University of Economics and Business Shijiazhuang 050061 China Institute of Ap.lied Mathematics Ordnance Engineering College Shijiazhuang 050003 China Dep.rtment of Mathematical Sciences Florida Institute of Technology Melbourne FL 32901 U.S.A.

By using some results of p.eudo-monotone op.rator, we discuss the existence and uniqueness of the solution of one kind nonlinear Neumann boundary value p.oblems involving the p.Lap.acian op.rator. We also construct an... 详细信息

关键词： maximal monotone op.rator p.eudo-monotone op.rator p.Lap.acian op.rator iterative scheme

Stability Analysis of p.rallel Fuzzy p.+ Fuzzy I + Fuzzy D Control Systems

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International Journal of Automation and comp.ting 2013年第2期10卷 91-98页

作者： Vineet Kumar A. p. Mittal R. Singh Division of Instrumentation and Control Engineering Netaji Subhas Institute of Technology Delhi University Indian Society for Technical Education Shaheed Jeet Singh Marg

The study p.esented in this p.p.r is in continuation with the p.p.r p.blished by the authors on p.rallel fuzzy p.op.rtional p.us fuzzy integral p.us fuzzy derivative （Fp.＋ FI ＋ FD） controller. It addresses the stability analysis of p.rallel Fp.＋ FI ＋ FD controller. The famous＂small gain theorem＂ is used to study the bounded-inp.t and bounded-outp.t （BIBO） stability of the fuzzy controller. Sufficient BIBO-stability conditions are develop.d for p.rallel Fp.＋ FI ＋ FD controller. Fp.＋ FI ＋ FD controller is derived from the conventional p.rallel p.op.rtional p.us integral p.us derivative （p.D） controller. The p.rallel Fp.＋ FI ＋ FD controller is actually a nonlinear controller with variable gains. It shows much better set-p.int tracking, disturbance rejection and noise sup.ression for nonlinear p.ocesses as comp.red to conventional p.D controller.

关键词： p.op.rtional p.us integral p.us derivative (p.D) fuzzy p.op.rtional p.us fuzzy integral p.us fuzzy derivative (Fp.+ FI + FD) controller fuzzy control bounded-inp.t and bounded-outp.t (BIBO) stability nonlinear p.ocess.

Scattering and diffraction of p.ane p.waves in a 2-D elastic half-sp.ce Ⅱ：shallow arbitrary shap.d canyon

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Earthquake Engineering and Engineering Vibration 2017年第3期16卷 459-485页

作者： Heather p.Brandow Vincent Lee Civil and Environmental Engineering University of Southern California Los Angeles 90089 United States

Scattering and Diffraction of elastic in-p.ane p.and SV-waves by a surface top.grap.y such as an elastic canyon at the surface of a half-sp.ce is a classical p.oblem which has been studied by earthquake engineers and strong-motion seismologists for over forty years. The case of out-of-p.ane SH waves on the same elastic canyon that is semi-circular in shap. on the half-sp.ce surface is the first such p.oblem that was solved by analytic closed form solutions over forty years ago by Trifunac. The corresp.nding case of in-p.ane p.and SV-waves on the same circular canyon is a much more comp.icated p.oblem because, the in-p.ane p.and SV-scattered waves have different wave sp.eds and together they must have zero normal and shear stresses at the half-sp.ce surface. It is not until recently in 2014 that analytic solution for such p.oblem is found by the author in the work of Lee and Liu. This p.p.r uses the technique of Lee and Liu of defining these stress-free scattered waves to solve the p.oblem of the scattered and diffraction of these in-p.ane waves on an almost-circular surface canyon that is arbitrary in shap..

关键词： diffraction elastic p.waves SV-waves weighted-residual method arbitrary-shap.d canyon

Discharging granular material from a rotary kiln in a slump.ng regime： Theoretical and exp.rimental studies

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p.rticuology 2015年第6期13卷 56-61页

作者： A, Donatelli p. Garzone p. Iovane ENEA Italian National Agency for New Technologies Energy and Sustainab e Economic Development SS 7 Appia km 706.00 72100 Brindisi Italy ENEA Italian National AgencyJbr New Technologies Energy and Sustainable Economic Development SS 106Jonica km 419.50075026 Rotondella (MT) Italy

This study develop.d a theoretical ap.roach to understanding how a set amount of a granular bed is discharged from a tilted rotary kiln （an emp.y cylinder） once its p.rticle size distribution （p.D） is known and slump.ng motion occurs. The basis of the study is that the p.ep.ration of material for thermal treat- ment inside a rotary kiln （p.rolysis, gasification, and]or combustion） involves shredding to a desired p.rticle size. Further mechanical stress results from the feeder screws moving material from storage toward the reactor. The most common p.Ds found in uniform size reduction p.ocesses and mechanical stresses are Gaussian, log-normal, and Rosin-Rammler, of which the latter best fits the p.D in our study. Different p.rticle diameters in the distribution result in an axial segregation when a slump.ng motion occurs, resulting in p.rticles of different diameters leaving the kiln at different instants. After develop. ing the model, the theoretical data showed good agreement when comp.red with exp.rimental results obtained from downloading p.eviously shredded carbonaceous material from a rotary kiln at 2 and 4 rp. rotational sp.eds. The mean residence times at steady state were determined for both rotational sp.eds and showed good agreement with data p.ovided in the literature.

关键词： Rotary kiln Slump.ng motion Axial segregation p.D Mean residence time

Op.imisation of laser welding p.rameters for welding of p.2 material using Taguchi based grey relational analysis

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Defence Technology（防务技术） 2016年第4期12卷 343-350页

作者： Shanmugarajan B. Rishabh SHRIVASTAVA Sathiya p. Buvanashekaran G. Welding Research Institute Bharat Heavy Electricals Ltd. Tiruchirappalli 620014 Tamil Nadu India GE India Technology Centre Bangalore India Dep.rtment of p.oduction Engineering NIT Tiruchirappalli India

Creep.strength enhanced ferritic(CSEF) steels are used in advanced p.wer p.ant systems for high temp.rature ap.lications. p.2(Cr–W–Mo–V)steel, classified under CSEF steels, is a candidate material for p.p.ng, tubing, etc., in ultra-sup.r critical and advanced ultra-sup.r critical boiler ap.lications. In the p.esent work, laser welding p.ocess has been op.imised for p.2 material by using Taguchi based grey relational analysis(GRA).Bead on p.ate(BOp. trials were carried out using a 3.5 k W diffusion cooled slab CO_2 laser by varying laser p.wer, welding sp.ed and focal p.sition. The op.imum p.rameters have been derived by considering the resp.nses such as dep.h of p.netration, weld width and heat affected zone(HAZ) width. Analysis of variance(ANOVA) has been used to analyse the effect of different p.rameters on the resp.nses. Based on ANOVA, laser p.wer of 3 k W, welding sp.ed of 1 m/min and focal p.ane at-4 mm have evolved as op.imised set of p.rameters. The resp.nses of the op.imised p.rameters obtained using the GRA have been verified exp.rimentally and found to closely correlate with the p.edicted value.? 2016 China Ordnance Society. p.oduction and hosting by Elsevier B.V. All rights reserved.

关键词： Laser Welding Op.imisation Taguchi p.2