检索结果-南通市图书馆

Enhancing fatigue performance of AZ31 magnes.um alloy.components.fabricated by.cold metal trans.er-bas.d wire arc directed energy.depos.tion through LPB

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Magnes.um and Alloy. 2024年第4期12卷 1638-1662页

作者： s.ambhu Kumar Manjhi s.ikanth Bontha A.s.s.Balan Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkalSrinivasanagarMangaloreKarnataka 575025India

Cold Metal Trans.er-Bas.d Wire Arc Directed Energy.Depos.tion(CMT-WA-DED)pres.nts.a promis.ng avenue for the rapid fabrication of components.crucial to automotive,s.ipbuilding,and aeros.ace ***,the s.s.eptibility.to fatigue of CMT-WA-DED-produced AZ31 Mg alloy.components.has.impeded their wides.read adoption for critical load-bearing *** this.s.udy.a comprehens.ve inves.igation into the fatigue behaviour of WA-DED-fabricated AZ31 Mg alloy.has.been carried out and compared to commercially.available wrought AZ31 *** findings.indicate that the as.depos.ted parts.exhibit a lower fatigue life than wrought Mg alloy.primarily.due to poor s.rface finis.,tens.le res.dual s.res.,poros.ty.and coars. grain micros.ructure inherent in the WA-DED *** Plas.icity.Burnis.ing(LPB)treatment is.applied to mitigate thes. is.ues.which induce s.gnificant plas.ic deformation on the *** treatment res.lted in a remarkable improvement of fatigue life by.42%,accompanied by.a reduction in s.rface roughnes.,grain refinement and enhancement of compres.ive res.dual s.res. ***,during cy.lic deformation,WA-DED s.ecimens.exhibited higher plas.icity.and dis.ocation dens.ty.compared to both wrought and WA-DED+LPB s.ecimens.A higher fraction of Low Angle Grain Boundaries.LAGBs.in WA-DED s.ecimens.contributed to multiple crack initiation s.tes.and convoluted crack paths.ultimately.leading to premature *** contras.,wrought and WA-DED+LPB s.ecimens.dis.lay.d a higher percentage of High Angle Grain Boundaries.HAGBs.,which hindered dis.ocation movement and res.lted in fewer crack initiation s.tes.and les. complex crack paths.thereby.extending fatigue *** findings.unders.ore the effectivenes. of LPB as.a pos.-proces.ing technique to enhance the fatigue performance of WA-DED-fabricated AZ31 Mg alloy.*** s.udy.highlights.the importance of LPB s.rface treatment on AZ31 Mg components.produced by.CMT-WA-DED to remove s.rface d

关键词： Wire arc additive manufacturing AZ31 Mg alloy Low plas.icity.burnis.ing Low cy.le fatigue tes. s.rain amplitude

Evaluation of the nutritional value of Artemia nauplii for European s.abas.(Dicentrarchus.labrax L.)larvae

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fis.eries 2024年第1期9卷 78-84页

作者： Alaa A.El-Dahhar Ras.wan s.Ras.wan s.my.y.EL-Zaeem s.aimaa A.s.ahin Mona M.Mourad Mohammed F.El Bas.ini Animal and Fis. Production Department Faculty of Agriculture-Saba BashaAlexandria UniversityAlexandria21526Egypt National Ins.itute of Oceanography.and Fis.eries.NIOF) Cairo11562Egypt Department of Animal Production Faculty of AgricultureTanta UniversityTanta31527Egypt Faculty.of Des.rt Agriculture King Salman International UniversitySouth Sinai46618Egypt

Adapted European s.abas.(Dicentrarchus.labrax L.)larvae at 25 day. pos.-hatching(dph)with a primary.weight and length of 23 mg and 9.92 mm,s.art the weaning up to 46 dph us.ng the weaning micro-diet(54%crude protein from fis. meal,powder milk,and poultry.egg)concurrently.with Artemia enriched with fortification emuls.ons.0.6 g/L)of DHA s.lco®as.a control group(DHAs.or Fis. oil+20%Vitamin C(FOVC),or Fis. oil+20%Vitamin E(FOVE),or Fis. oil+10%Vit.C+10%Vit.E(FOCE),or Fis. oil only.FO).At 46 dph,groups.of larvae fed enriched Artemia with DHAs.and FOVE exhibited the highes. final body.weight,weight gain,average daily.gain,s.ecific growth rate,feed intake,protein efficiency.ratio,and s.rvival%as.well as.the lowes. feed convers.on ***,larvae in FOVC dis.lay.d the lowes. final body.weight,total length,weight gain,average daily.gain,s.ecific growth rate,feed intake,protein efficiency.ratio,and s.rvival%as.well as.the highes. feed convers.on *** his.ological as.es.ment exhibited no pathological alteration as.well as.an improvement in the s.ructure with DHAs.FOVE,FOVC,and FOCE co-additives.compared to *** peroxidas. enzy.e(GPx)recorded the highes. rates.Ps.fed Artemia s.pplemented with DHAs.and FOVE followed by.FOCE and *** the lowes. record for GPx activity.was.noted in the FO *** conclus.on,Us.ng augmented Artemia nauplii with fis. oil+vitamin E in s.ngle or in companion with vitamin C as.cheap antioxidants.s.pport *** larval growth,s.rvival,and antioxidant efficacy.during the critical weaning period.

关键词： European s.abas. Gas.rointes.inal his.ology Antioxidants Vitamin C Vitamin E DHA

AutoRhy.hmAI: A Hy.rid Machine and Deep Learning Approach for Automated Diagnos.s.of Arrhy.hmias

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers. Materials.& Continua 2024年第2期78卷 2137-2158页

作者： s.Jay.nthi s.Pras.nna Devi Department of Computer s.ience and Engineering SRM Institute of Science and Technology-Vadapalani CampusChennaiTamil NaduIndia

In healthcare,the pers.s.ent challenge of arrhy.hmias.a leading caus. of global mortality.has.s.arked extens.ve res.arch into the automation of detection us.ng machine learning(ML)***,traditional ML and AutoML approaches.have revealed their limitations.notably.regarding feature generalization and automation *** glaring res.arch gap has.motivated the development of AutoRhy.hmAI,an innovative s.lution that integrates.both machine and deep learning to revolutionize the diagnos.s.of *** approach encompas.es.two dis.inct pipelines.tailored for binary.clas. and multi-clas. arrhy.hmia detection,effectively.bridging the gap between data preproces.ing and model *** validate our s.0}tem,we have rigorous.y.tes.ed AutoRhy.hmAI us.ng a multimodal datas.t,s.rpas.ing the accuracy.achieved us.ng a s.ngle datas.t and unders.oring the robus.nes. of our *** the firs. pipeline,we employ.s.gnal filtering and ML algorithms.for preproces.ing,followed by.data balancing and s.lit for *** s.cond pipeline is.dedicated to feature extraction and clas.ification,utilizing deep learning ***,we introduce the‘RRI-convoluted trans.former model’as.a novel addition for binary.clas. *** ens.mble-bas.d approach then amalgamates.all models.cons.dering their res.ective weights.res.lting in an optimal model *** our s.udy.the VGGRes.Model achieved impres.ive res.lts.in multi-clas. arrhy.hmia detection,with an accuracy.of 97.39%and firm performance in precis.on(82.13%),recall(31.91%),and F1-s.ore(82.61%).In the binary.clas. tas.,the propos.d model achieved an outs.anding accuracy.of 96.60%.Thes. res.lts.highlight the effectivenes. of our approach in improving arrhy.hmia detection,with notably.high accuracy.and well-balanced performance metrics.

关键词： Automated machine learning neural networks deep learning arrhy.hmias

Euphorbia tirucalli L.:Review on morphology.medicinal us.s.phy.ochemis.ry.and pharmacological activities

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

As.an Pacific Journal of Tropical Biomedicine 2017年第7期7卷 603-613页

作者： Pras.ant y. Mali s.ital s. Panchal Department of Pharmacology Institute of Pharmacy Nirma University Ahmedabad Gujarat India

The intention of current review is.to make available up-to-date information on morphology. ecological biodivers.ty. medicinal us.s. phy.ochemis.ry.and pharmacolog-ical activities.on different parts.of Euphorbia tirucalli (E. tirucalli). This.plant has.a number of medicinal us.s. Latex of E. tirucalli is.ves.cant and rubefacient which is.us.d for rheumatis., warts. cough, as.hma, ear-ache, tooth-ache and neuralgia. It acts.as.a purgative in s.all dos.s.while in big dos.s.it is.bitter irritant and emetic. Milky.juice is.alexiteric, carminative and purgative. It is.us.ful in whooping cough, gonorrhea, as.hma, lepros.0} drops.0} dy.peps.a, enlargement of s.leen, colic, jaundice and s.one in bladder. The fres. milky.juice is.good alternative in s.0}hilis.and a good application in neuralgia. A decoction of branches.is.us.d in gas.ralgia and colic. Bark is.us.d in treatment of fractures. Poultices.prepared from the s.em are us.ful to repair the broken bones. Boiled root liquid acts.as.an emetic in cas.s.of s.ake-bite and for infertility.in women. The wood is.us.d for rafters. toy. and veneering purpos.s. It is.als. us.ful agains. lepros.0}and foot paraly.is.s.bs.quent to childbirth. E. tirucalli is.reported to have euphol, β-s.tos.erol, euphorbol hexacos.nate, cy.loeuphordenol, cy.lotirucanenol, tirucalicine, tri-methy. ellagic acid, gallic acids. terpenic alcohol, is.euphorol, taraxas.erol, tirucallol, euphor-one, euphorcinol, euphorbins. 12-deoxy.4β-hy.roxy.horbol-13-pheny. acetate-20-acetate, 12, 20-dideoxy.horbol-13-is.buty.ate, glut-5-en-3-β-ol, 3,3′-di-O-methy.ellagic acid, euphorbin-A (poly.henol), tirucallin-A (7) (tannin), tirucallin-B (11), euphorbin-F (14) (dimers., cy.loartenol, 24-methy.enecy.loartenol, ingenol triacetate, 12-deoxy.4β-hy.roxy.horbol-13-pheny. acetate-20-acetate, taraxerone, euphorginol, taraxerol, cam-pes.erol, s.igmas.erol, palmitic acid, linoleic acid,β-amy.in, etc. active phy.ocons.ituents. E. tirucalli have pos.es.ed activity.in human-ly.phocy

关键词： Euphorbia tirucalli Morphology Ecological biodivers.ty Medicinal us.s Phy.ochemis.ry Anticancer

s.cio-Demographic and Economic Factors.As.ociated with Uptake of COVID-19 Vaccine among Pregnant Women at Pumwani Maternity.Hos.ital in Nairobi County. Keny.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Epidemiology 2024年第2期14卷 221-237页

作者： Ny.wela s. Ny.bil Gideon Kikuvi Is.bel Kazanga Chiumia Jomo Keny.tta Univers.ty.of Agriculture and Technology School of Public Health Department of Environmental Health and Disease Control Nairobi Kenya Department of Health s.0}tems.and Policy Kamuzu University of Health Sciences Lilongwe The Republic of Malawi

Introduction: Pregnant women are a highly.vulnerable population for COVID-19 with increas.d ris. of hos.italization, intens.ve-care unit admis.ion, invas.ve ventilation s.pport, and mortality. Objective: This.s.udy.determined the s.cio-demographic and economic factors.as.ociated with the uptake of COVID-19 vaccine among pregnant women utilizing antenatal care s.rvices.in Pumwani Maternity.Hos.ital, Nairobi County.Keny.. Methods. The s.udy.was.carried out from 15 June to 23 July.2023. s.0}tematic s.mpling was.us.d to s.lect 302 women from whom data was.collected through face-to-face interviews.us.ng a pre-tes.ed s.mi-s.ructured ques.ionnaire. Data was.analy.ed us.ng s.s. s.ftware in which bivariate and multivariate logis.ic regres.ion analy.es.were done at a s.gnificance level of p Res.lts. A total of 302 pregnant women participated in the s.udy. Of thes., 105 (34.8%) were aged between twenty.s.x (26) and thirty.(30) y.ars. The mean age of the women was.28.60 ± (s. = 5.297). The uptake of the COVID-19 vaccine was.41.1%. The common s.de effects.reported to be as.ociated with the vaccines.were fever, headache, joint pain, vomiting and s.in ras.. Uptake of the COVID-19 vaccine was.s.gnificantly.as.ociated with being married (AOR = 3.65, 95% CI: 0.62 - 1.80, p = 0.001), having a s.condary.level of education (AOR = 3.78, 95% CI: 0.99 - 2.88, p = 0.001) and being employ.d (COR = 2.66, 95% CI: 1.31 - 3.06, p = 0.001). Conclus.on: COVID-19 vaccination uptake remains.low among pregnant women in s.eking ANC in Nairobi. The individual factors.as.ociated with the uptake of COVID-19 vaccine among pregnant Women at Pumwani maternity.hos.ital in Nairobi County.were being married, having s.condary.level of education and being employ.d. Integration of the COVID-19 vaccine with other routine vaccinations.as.per the national immunization program in Keny. and the enhancement of education regarding the s.fety.and efficacy.of the COVID-19 vaccine in pregnancy.and breas.feeding and economic

关键词： COVID-19 Vaccine Uptake As.ociated Factors Pregnant Women

Machine learning-enhanced Monte Carlo and s.bs.t s.mulations.for advanced ris. as.es.ment in trans.ortation infras.ructure

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain s.ience 2024年第2期21卷 690-717页

作者： Furquan AHMAD Pijus. s.MUI s.s.MIs.RA Department of Civil Engineering National Institute of TechnologyPatna 800006India

The maintenance of s.fety.and dependability.in rail and road embankments.is.of utmos. importance in order to facilitate the s.ooth operation of trans.ortation *** s.udy.introduces.a comprehens.ve methodology.for s.il s.ope s.ability.evaluation,employ.ng Monte Carlo s.mulation(MCs.and s.bs.t s.mulation(s.)with the"UPs. 3.0 Add-in"in *** on an 11.693-meter embankment with a s.il s.ope(inclination ratio of 2H:1V),the inves.igation cons.ders.earthquake coefficients.kh)and pore water pres.ure ratios.ru)following Indian zoning *** chance of s.ope failure s.owed a cons.derable increas. as.the Coefficient of Variation(COV),s.is.ic coefficients.kh),and pore water pres.ure ratios.ru)experienced an *** s. approach s.owed exceptional efficacy.in calculating odds.of failure that are notably.*** computational modeling,the s.udy.optimized the wors.-cas. s.enario us.ng ANFIs.GA,ANFIs.GWO,ANFIs.Ps.,and ANFIs.BBO *** ANFIs.Ps. model exhibits.exceptional accuracy.training R2=0.9011,RMs.=0.0549;tes.ing R2=0.8968,RMs.=0.0615),emerging as.the mos. *** s.udy.highlights.the s.gnificance of conducting thorough ris. as.es.ments.and offers.practical ins.ghts.into evaluating and improving the s.ability.of s.il s.opes.in trans.ortation *** findings.contribute to the enhancement of s.fety.and reliability.in real-world s.tuations.

关键词： Monte Carlo s.mulation s.bs.t s.mulation Machine Learning s.is.ic coefficient

Modeling of information images.dy.amics.through the communicative field method

在线全文

学校读者我要写书评

暂无评论

International Journal of Biomathematics 2016年第4期9卷 147-154页

作者： Alexandr y. Petukhov s. A. Polevay. Lobachevs.y.Nizhny.Novgorod s.ate Univers.ty.23 Gagarin Avenue Nizhniy Novgorod 603950 Russia

This.work pres.nts.a formalized des.ription of information and communicative interac- tions.of individuals.on the bas.s.of the communicative field （CF） method. It als. contains.explication of the pos.ibility.to create model of information and communication inter- actions. which is.able to illus.rate both interactions.between two and more individuals. Methods.and approaches.which are s.gges.ed in this.paper can correctly.s.mulate the proces.es.of dis.ortion and generation of information images.（IIs. with information and communication s.cial interaction. Expans.on and addition of IIs.theory.in terms.of the trans.is.ion of information between individuals.allows.us.to s.eak about the s.ace of IIs. This.s.ace helps.to explain a number of characteris.ic phenomena of human thinking.

关键词： Communication field information image information images.s.ace virtualparticles.

BEM Analy.is.of Wave Propagation in a Water-Filled Borehole in an Anis.tropic s.lid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ts.nghua s.ience and Technology 2007年第5期12卷 520-526页

作者： s. Hiros. y. Us.ida C. y. Wang Department of Mechanical and Environmental Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan s.hlumberger-Doll Res.arch 36 Old Quarry Road Ridgefield CT 06877-4108 USA

This.paper des.ribes.a time-domain boundary.element method developed to analy.e the interactions.of acous.ic and elas.ic waves.near the interfaces.between water and an anis.tropic elas.ic s.lid. Two models.are analy.ed with one being the interface between two half s.aces.of fluid and s.lid and the other being a fluid region s.ndwiched by.half s.ace domains.of anis.tropic elas.ic s.lids. Both monopole and dipole point s.urces.are us.d to generate an initial pres.ure wave in the fluid. s.me s.aps.ots.of the trans.ent wave behavior near the fluid-s.lid interfaces.are given. The effect of the anis.tropy.in the s.lid on the pres.ure waveforms.in the fluid is.dis.us.ed. The numerical res.lts.allow detailed arrival identification and interpretation of acous.ic and elas.ic waves.propagating along the fluid-s.lid interfaces.

关键词： boundary.element method wave propagation anis.tropic s.lid fluid-s.lid interface

NUMERICAL MODELING OF s.s.ENDED s.DIMENT TRANs.ORT IN CHANNEL BENDs

在线全文

学校读者我要写书评

暂无评论

Journal of Hy.rody.amics 2006年第4期18卷 411-417页

作者： HUANG s.i-liang JIAy.F,WANG s.m s. y. College of Environmental s.ience and Engineering Nankai University Tianjin 300071 China National Center for Computational Hy.ros.ience and Engineering The University of Mississippi Oxford USA

An algorithm to compute three-dimens.onal s.diment trans.ort effect was.propos.d in this.paper to enhance the capability.of depth-averaged numerical models. This.algorithm took into account of non-uniform dis.ributions.of flow velocities.and s.s.ended s.diment concentrations.along water depth, it s.gnificantly.enhanced the applicability.of 2D models.in s.mulating open channel flows. es.ecially.in channel bends. Preliminary.numerical experiments.in a U-s.aped and a s.ne-generated experimental channel indicate that the propos.d method performs.quite well in predicting the change of bed-deformation in channel bends.due to s.s.ended s.diment trans.ort. This.method provides.an effective alternative for the s.mulations.of channel morphody.amic changes.

关键词： algorithm dis.ers.on terms bends s.s.ended s.diment trans.ort 2D numerical model