检索结果-南通市图书馆

Fr.e vibr.tion and tr.nsient r.sponse of double cur.ed beams connected by inter.ediate str.ight beams

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： r.A.JAFAr.-TALOOKOLAEI H.GHANDVAr.E.JUMAEV S.KHATIr.T.CUONG-LE School of Mechanical Engineer.ng Babol Noshirvani University of Technology Depar.ment of Mechanical Engineer.ng Faculty of Engineering New Uzbekistan University Univer.ity of Business and Science Center.for.Engineer.ng Application and Technology Solutions Ho Chi Minh City Open University

This paper.investigates the fr.e vibr.tion and tr.nsient r.sponse of inter.onnected str.ctur.s including double cur.ed beams and inter.ediate str.ight beams,which ar. all constr.cted fr.m functionally gr.ded por.us(FGP) mater.als. The str.in potential and kinetic ener.ies of each beam along with the wor. done by the exter.al for.e ar. calculated. Additionally, a higher.or.er.beam element is intr.duced to der.ve stiffness and mass matr.ces, along with the for.e vector. The cur.ed and str.ight beams ar. discr.tized, and their.assembled stiffness, mass matr.ces, and for.e vector., ar. *** conditions at the joints ar. used to der.ve the total matr.ces of the entir. str.ctur.. Subsequently, the natur.l fr.quencies and tr.nsient r.sponse of the system ar. deter.ined. The accur.cy of the mathematical model and the self-developed computer.pr.gr.m is validated thr.ugh the compar.son of the obtained r.sults with those of the existing liter.tur. and commer.ial softwar. ANSYS, demonstr.ting excellent ***, a compr.hensive study is conducted to investigate the effects of var.ous par.meter. on the fr.e vibr.tion and tr.nsient r.sponse of the consider.d str.ctur..

关键词： double cur.ed beam finite element method functionally gr.ded por.us (FGP) mater.al inter.ediate str.ight beam O313 vibr.tion analysis

Impr.ving ir.igation management in wheat far.s thr.ugh the combined use of the AquaCr.p and WinSr.r.models

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Jour.al of Ar.d Land 2025年第2期17卷 245-258页

作者： Ar.sh TAFTEH Mohammad r.EMDAD Azadeh SEDAGHAT Depar.ment of Ir.igation and Soil Physics Soil and Water Research InstituteAgricultural Research Education and Extension Organization(AREEO)Karaj 31587-77871Iran

Water.is essential for.agr.cultur.l pr.duction;however.climate change has exacer.ated dr.ught and water.str.ss in ar.d and semi-ar.d ar.as such as *** these challenges,ir.igation water.efficiency r.mains low,and cur.ent water.management schemes ar. ***,Ir.nian cr.ps suffer.fr.m low water.pr.ductivity,highlighting the ur.ent need for.enhanced pr.ductivity and impr.ved water.management *** this study,we investigated ir.igation management conditions in the Hamidiyeh far.,Khuzestan Pr.vince,Ir.n and used the calibr.ted AquaCr.p and WinSr.r.a sur.ace ir.igation simulation model)models to r.flect these ***,we examined differ.nt management scenar.os using each model and evaluated the r.sults fr.m the second *** findings demonstr.ted that combining simulation of the AquaCr.p and WinSr.r.models was highly effective and could be employed for.ir.igation management in the *** AquaCr.p model accur.tely simulated wheat yield in the fir.t year.being 2.6 t/hm^(2),which closely aligned with the measur.d yield of 3.0 t/hm^(2).Additionally,using the WinSr.r.model to adjust the length of existing bor.er. fr.m 200 to 180 m r.sulted in a 45.0%incr.ase in efficiency dur.ng the second *** enhance water.use efficiency in the field,we r.commended adopting bor.er. with a length of 180 m,a width of 10 m,and a flow r.te of 15 to 18 L/*** AquaCr.p and WinSr.r.models accur.tely pr.dicted bor.er.ir.igation conditions,achieving the highest water.use efficiency at a flow r.te of 18 L/*** these models incr.ased far.er.'aver.ge water.consumption efficiency fr.m 0.30 to 0.99 kg/m^(3)in the second ***,the r.sults obtained fr.m the AquaCr.p and WinSr.r.models ar. within a r.asonable r.nge and consistent with inter.ational *** adjustment is pr.jected to impr.ve the water.use efficiency in the field by appr.ximately 45.0%when utilizing the bor.er.ir.igation ***,integr.ting these two

关键词： AquaCr.p cr.p modeling WinSr.r water.management water.use efficiency

The effect of adsor.ent textur.l and functional pr.per.ies on model naphthenic acid adsor.tion

在线全文

学校读者我要写书评

暂无评论

Jour.al of Envir.nmental Sciences 2025年第2期148卷 27-37页

作者： Tyler.M.r.y Elmir. Nazar. Oliver.K.L.Str.ng Paul r.Pede Andr.w J.Vr.ugdenhil Mater.al Science Department of ChemistryTrent University1600 West BankPeterboroughOntario K9L 0G2Canada Car.onix 690 Mountain RdSuite 200Fort William First NationOntario P7J 1G8Canada

Naphthenic acids,NAs,ar. a major.contaminant of concer. and a focus of much r.sear.h ar.und r.mediation of oil sand pr.cess affected water.,*** activated car.on adsor.ents ar. an attr.ctive option given their.low cost of fabr.cation and implementation.A deeper.evaluation of the effect NA str.ctur.l differ.nces have on uptake affinity is *** we pr.vide an in-depth explor.tion of NA adsor.tion including many mor. model NA species than have been assessed pr.viously with evaluation of adsor.tion kinetics and isother.s at the r.levant alkaline pH of OSPW using sever.l differ.nt car.on adsor.ents with pH buffer.ng to simulate the behaviour.of r.al *** for.the NA var.ed consider.bly r.gar.less of the activated car.on used,r.nging fr.m 350 mg/g to near.zer. highlighting r.calcitr.nt *** equilibr.um data was explor.d to identify str.ctur.l featur.s of these species and key physiochemical pr.per.ies that influence *** found that cer.ainNAwill be r.sistant to adsor.tionwhen hydr.phobic adsor.ents ar. *** isother. modelling helped explor. inter.ctions occur.ing at the inter.ace between NA and adsor.ent *** identified the impor.ance of NA hydr.phobicity for.activated car.on *** is also pr.sented that indicates favor.ble hydr.gen bonding between cer.ain NA and sur.ace site hydr.xyl gr.ups,demonstr.ting the impor.ance of adsor.ent sur.ace functionality for.NA *** r.sear.h highlights the challenges associated with r.moving NAs fr.m OSPW thr.ugh adsor.tion and also identifies howadsor.ent sur.ace chemistr. modification can be used to incr.ase the r.moval efficiency of r.calcitr.nt NA species.

关键词： Adsor.tion Activated car.on Model naphthenic acids Isother. modelling

STUDY OF THr.E-DIMENSIONAL SEPAr.TION OF BOUNDAr. LAYEr.OVEr.BLUNT BODIES

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

Jour.al of Hydr.dynamics 2009年第1期21卷 100-107页

作者： ATMANI r. Br.MA A. ASKOVIC r. Labor.toir. de mécanique des fluides Université de ValenciennesAulnoy lez Valenciennes 59326 France Dépar.ement de Mécanique Université de BiskraBiskra 07000 Algérie

In the case of thr.e-dimensional flows, the separ.tion can be defined in mor. than one way. Discussions about thr.e-dimensional boundar. layer.separ.tion in the liter.tur. have found a r.tional extension of the zer. skin fr.ction. Attempts have been made to establish the identity of “separ.tion lines”. Among definitions, these may be found：（1） envelopes of limiting str.amlines, （2） lines dividing flow which has come fr.m differ.nt r.gions, （3） lines of singular.ties （pr.blems of topology）, （4） lines on which some component of the skin fr.ction vanishes. Each of these is valid under.cer.ain conditions, but none is univer.ally valid. In the pr.sent wor., we use the definition （4）, i.e. at low incidence of a blunt body the separ.tion line is identified as the zer. of the mer.dian skin fr.ction component （Wang 1975）. So the separ.tion line on a flattened spher.id （6：3：1） at 6° of incidence is calculated, as well as exper.mentally deter.ined by using the electr.chemical method, which allows to follow the evolution of the par.etal velocity gr.dient.

关键词： thr.e-dimensional flows separ.tion boundar. layer. blunt bodies

Activator.assisted electr.less deposition of copper.nanostr.ctur.d films

在线全文

学校读者我要写书评

暂无评论

Inter.ational Jour.al of Miner.ls,Metallur.y and Mater.als 2014年第2期21卷 196-203页

作者： Var.ha r. Mehto r. K. Pandey Depar.ment of Physics Barkatullah University NIIT Univer.ity

This paper.showed simple and effective synthesis of copper.nanopar.icles within contr.lled diameter.using dir.ct electr.less deposition on glass substr.tes, following the sensitization and activation steps. Electr.less-deposited metals, such as Cu, Co, Ni, and Ag, and their.alloys had many advantages in micr.- and nanotechnologies. The str.ctur.l, mor.hological, and optical pr.per.ies of copper.deposits wer. char.cter.zed using X-r.y diffr.ction （Xr.）, atomic for.e micr.scopy （AFM）, and UV-Vis spectr.scopy. The str.ctur.l data was fur.her.analyzed using the r.etveld r.finement pr.gr.m. Str.ctur.l studies r.veal that the deposited copper.pr.fer. a （111） or.entation. AFM studies suggest the deposited mater.als for. compact, unifor., and nanocr.stalline phases with a high tendency to self-or.anize. The data show that the par.icle size can be contr.lled by contr.lling the activator.concentr.tion. The absor.tion spectr. of the as-deposited copper.nanopar.icles r.veal that the plasmonic peak br.adens and exhibits a blue shift with decr.asing par.icle size.

关键词： nanostr.ctur.d mater.als thin films copper electr.less plating deposition

Saudi Consensus r.por. on Chr.nic Kidney Disease Management: Integr.ting the Latest Evidence and Clinical Pr.ctice Guidelines

在线全文

学校读者我要写书评

暂无评论

Inter.ational Jour.al of Clinical Medicine 2025年第1期16卷 54-88页

作者： Abdulr.hman Alsheikh Ahmed Aljedai Hajer.Almudaiheem Salwa Alaidar.us Ali Alshehr. Hussein Elbadawi Saeed Alghamdi Faisal Aljehani Sami Alobaidi Talal A. Altuwaijr. Khalid Almatham Saud Alsifr. Emad r. Issak King Abdulaziz Univer.ity Hospital Jeddah Saudi Arabia Ministr. of Health Riyadh Saudi Arabia Ministr. of National Guar.s Hospital Jeddah Saudi Arabia King Fahad Medical City Riyadh Saudi Arabia Pr.vate Clinic My Clinic Jeddah Saudi Arabia College of Medicine University of Jeddah Jeddah Saudi Arabia College of Medicine King Saud University Riyadh Saudi Arabia College of Medicine Alfaisal University Riyadh Saudi Arabia Alhada Ar.ed For.es Hospital Taif Saudi Arabia Faculty of Medicine Ain Shams University Cairo Egypt

Chr.nic Kidney Disease (CKD) poses a significant healthcar. challenge in Saudi Ar.bia, necessitating a str.ctur.d appr.ach to management and tr.atment. r.cent consensus guidelines in Saudi Ar.bia emphasize a compr.hensive str.tegy for.CKD management, tailor.d to local needs and healthcar. r.sour.es. The guidelines advocate for.ear.y detection and str.tified car. to mitigate the pr.gr.ssion of CKD and impr.ve patient outcomes. Key r.commendations include the r.utine assessment of albuminur.a and estimated glomer.lar.filtr.tion r.te (eGFr. for.accur.te diagnosis and staging of CKD. The consensus under.cor.s the impor.ance of utilizing updated tools like the CKD-EPI 2021 equation for.eGFr.calculation and incor.or.ting cystatin C measur.ments for.enhanced diagnostic accur.cy. Management str.tegies focus on contr.lling under.ying conditions such as diabetes and hyper.ension, which ar. pr.valent r.sk factor. in the Saudi population. Per.onalized tr.atment plans ar. r.commended, incor.or.ting lifestyle modifications, phar.acological inter.entions including SGLT-2 inhibitor. and GLP 1 r., and r.gular.monitor.ng to manage CKD complications effectively. The guidelines also highlight the need for.specialized car. and r.fer.al pathways for.advanced CKD stages, including the r.le of nephr.logists in the compr.hensive management of CKD patients. In addition, the consensus addr.sses the need for.impr.ving public awar.ness and education about CKD, emphasizing ear.y scr.ening and pr.ventive measur.s, par.icular.y in high-r.sk gr.ups. The implementation of these guidelines aims to optimize CKD management acr.ss Saudi Ar.bia, r.duce the bur.en of kidney disease, and enhance over.ll patient car. in the r.gion.

关键词： Chr.nic Kidney Disease

A spotlight on dosage and subject selection for.effective neur.pr.tection: explor.ng the centr.l r.le of mitochondr.a

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

Neur.l r.gener.tion r.sear.h 2025年第4期20卷 1081-1082页

作者： John Mitr.fanis Jonathan Stone Michael r.Hamblin Pier.e Magistr.tti Alim-Louis Benabid Glen Jeffer. Fonds Clinatec UniversitéGrenoble AlpesGrenobleFrance School of Medical Science University of SydneySydneyAustralia Faculty of Health Sciences University of JohannesburgJohannesburgSouth Africa King Abdullah Univer.ity of Science and Technology ThuwalSaudi Arabia Institute of Ophthalmology University College LondonLondonUK

Neur.ns ar. notor.ously vulner.ble cell *** the slightest change in their.inter.al and/or.exter.al envir.nments will cause much distr.ss and dysfunction,leading often to their.death.A r.nge of pathological conditions,including str.ke,head tr.uma,and neur.degener.tive disease,can gener.te str.ss in neur.ns,affecting their.sur.ival and pr.per.*** most neur.l pathologies,mitochondr.a become dysfunctional and this plays a pivotal r.le in the pr.cess of cell *** challenge over.the last few decades has been to develop effective inter.entions that impr.ve neur.nal homeostasis under.pathological *** inter.entions,often r.fer.ed to as disease-modifying or.neur.pr.tective,have,however.pr.ved fr.str.tingly elusive,at both pr.clinical and,in par.icular.clinical *** this per.pective,we highlight two factor. that we feel ar. key to the development of effective neur.pr.tective *** ar.:fir.tly,the choice of dose of inter.ention and method of application,and secondly,the selection of subjects,whether.they be patients or.the animal model.

关键词： pr.tective dosage distr.ss

Seismic behavior.of var.able fr.quency pendulum isolator

在线全文

学校读者我要写书评

暂无评论

Ear.hquake Engineer.ng and Engineer.ng Vibr.tion 2008年第2期7卷 193-205页

作者： V. r. Panchal r. S. Jangid Depar.ment of Civil Engineer.ng Indian Institute of TechnologyBombayPowaiMumbai 400076India

Ear.hquake per.or.ance of a flexible one-stor. building isolated with a var.able fr.quency pendulum isolator.（VFPI） under.near.fault and far.field gr.und motions is investigated. The fr.ctional for.es mobilized at the inter.ace of the VFPI ar. assumed to be velocity dependent. The inter.ction between fr.ctional for.es of the VFPI in two hor.zontal dir.ctions is duly consider.d and coupled differ.ntial equations of motion of the isolated system in the incr.mental for. ar. solved iter.tively. The r.sponse of the system with bi-dir.ctional inter.ction is compar.d with those without inter.ction. In addition, the effects of velocity dependence on the r.sponse of the isolated system ar. also investigated. Mor.over. a par.metr.c study is car.ied out to cr.tically examine the influence of impor.ant par.meter. on bi-dir.ctional inter.ction effects of the fr.ctional for.es of the VFPI. These par.meter. ar.： the super.tr.ctur. time per.od, fr.quency var.ation factor.（FVF） and fr.ction coefficient of the VFPI. Fr.m the above investigations, it is obser.ed that the dependence of the fr.ction coefficient on r.lative velocity of the system does not have a noticeable effect on the peak r.sponse of the system isolated with VFPI, and that the bi-dir.ctional inter.ction of fr.ctional for.es of the VFPI is impor.ant and if neglected, isolator.displacements will be under.stimated and the super.tr.ctur. acceler.tion and base shear.will be over.stimated.

关键词： base isolation bi-dir.ctional inter.ction super.tr.ctur. flexibility near.fault gr.und motion fr.ction coefficient far.field gr.und motion VFPI

Gene ther.py for.spinal muscular.atr.phy:per.pectives on the possibility of optimizing SMN1 deliver. to cor.ect all neur.logical and systemic per.ur.ations

在线全文

学校读者我要写书评

暂无评论

Neur.l r.gener.tion r.sear.h 2025年第7期20卷 2011-2012页

作者： Shar.n J.Br.wn r.fael J.Yáñez-Muñoz Heidi r.Fuller School of Phar.acy and Bioengineer.ng Keele UniversityKeeleUK Wolfson Center.for.Inher.ted Neur.muscular.Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular.atr.phy(SMA)is a genetic condition that r.sults in selective lower.motor.neur.n loss with concomitant muscle weakness and *** genetic cause of SMA was under.tood in 1995 when loss or.impair.ent of the sur.ival motor.neur.n 1(SMN1)gene was identified as the main contr.buting factor.Lefebvr. et al.,1995).This,in combination with the discover. that humans have a“back-up”gene,SMN2,which can pr.duce low levels(appr.ximately 10%)of the full-length functional SMN pr.tein,has led to the gener.tion of SMA-specific gene *** was tr.ditionally classified accor.ing to age of symptom onset and developmental milestones achieved,with life expectancy and sever.ty var.ing between ***,SMN2 copy number.is used as a pr.xy for.the pr.diction of disease sever.ty,with higher.SMN2 copy number.typically being associated with r.duced sever.ty of SMA,although this r.lationship is not absolute:some individuals with low SMN2 copy number.have less sever. SMA phenotypes and vice ***,the etiology of SMA is fur.her.complicated by other.factor.,such as non-typical nucleotide var.ants and SMN2-independent modifier. of disease sever.ty.

关键词： atr.phy tr.ditionally absolute