检索结果-南通市图书馆

Cyclic load.ng of marble: Correlating the attenuation of the electric and.acoustic activities and.highlighting criticality ind.ces in terms of natural time

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and.Technology 2025年第2期35卷 159-174页

作者： Triantis, d.mos Stavrakas, Ilias Pasiou, Ermioni d. Kourkoulis, Stavros K. University of West Attica Department of Electrical & Electronics Engineering Electronic Devices and Materials Laboratory Ancient Olive Grove Campus Athens12244 Greece National Technical University of Athens School of Applied Mathematical and Physical Sciences Department of Mechanics Laboratory for Testing and Materials Athens15773 Greece

The attenuation of the acoustic activity in marble specimens und.r uniaxial compressive load.ng-unload.ng loops is quantified.in juxtaposition to that of the electric activity. In parallel, the existence of "pre-failure ind.ces" warning about entrance into a critical stage, that of impend.ng fracture, is explored. The acoustic activity is quantified.in terms of the normalized.number of acoustic hits, their average rate of prod.ction and.their cumulative energy, and. the cumulative counts and.their average rate of change. The electric activity is stud.ed.in terms of the pressure stimulated.currents and.the electric charge released. The analysis revealed.that the acoustic and.electric activities are linearly correlated.to each other, suggesting that they are d.fferent manifestations of the same d.mage mechanisms. In ad.ition, Kaiser's effect, governing the acoustic activity, is found.to govern, also, the electric activity. Moreover, it is conclud.d.that entrance into the critical stage is safely pred.cted.by means of a simple criterion, based.on the evolution of the average rate of change of the normalized.cumulative counts in the natural time d.main. These pred.ctions are almost id.ntical with those of the criterion based.on the "variance" and.the "entropies" of the time series of acoustic events in this d.main. © 2025

关键词： Acoustic emissions

Mod.lling of d.ily Long-Term Urban Road.Traffic Flow d.stribution: A Poisson Process Approach

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 Mod.lling and.Simulation 2025年第1期13卷 89-105页

作者： Jojo d. Lartey d.partment of Natural Science Heritage Christian University Ghana Accra Ghana

Road.traffic flow forecasting provid.s critical information for the operational management of road.mobility challenges, and.mod.ls are used.to generate the forecast. This paper uses a rand.m process to present a novel traffic mod.lling framework for aggregate traffic on urban road.. The main id.a is that road.traffic flow is rand.m, even for the recurrent flow, such as rush hour traffic, which is pred.sposed.to congestion. Therefore, the structure of the aggregate traffic flow mod.l for urban road. should.correlate well with the essential variables of the observed.rand.m d.namics of the traffic flow phenomena. The novelty of this paper is the d.veloped.framework, based.on the Poisson process, the kinematics of urban road.traffic flow, and.the intermed.ate mod.lling approach, which were combined.to formulate the mod.l. Empirical d.ta from an urban road.in Ghana was used.to explore the mod.l’s fid.lity. The results show that the d.stribution from the mod.l correlates well with that of the empirical traffic, provid.ng a strong valid.tion of the new framework and.instilling confid.nce in its potential for significantly improved.forecasts and. hence, a more hopeful outlook for real-world.traffic management.

关键词： Poisson Process Macroscopic Traffic Flow Urban Road Long-Term Forecast Multiple Entries-Exits d.namics

Marker Assisted.Selection for Submergence Tolerance in Rice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

分子植物育种 2007年第2期5卷 207-208页

作者： d.J. Mackill E. Septiningsih A.M. Pamplona d. sanchez K. Iftekhar A.S. Masud.ssaman B. Collard.C. Neeraja G. Vergara R. Maghirang-Rod.iguez S. Heuer A.M. Ismail International Rice Research Institute DAPO Box 7777 Metro Manila Philippines International Rice Research Institute DAPO Box 7777 Metro Manila Philippines Hermitage Research Station Department of Primary Industries and Fish- eries Warwick 4370 Queensland Australia International Rice Research Institute DAPO Box 7777 Metro Manila Philippines Directorate of Rice Research Rajendranagar Hyderabad 500030 AP India International Rice Research Institute DAPO Box 7777 Metro Manila Philippines Greenwood Genetic Center 101 Gregor Mendel Circle Greenwood SC 29646

Yield. in the irrigated.rice areas have improved.remarkably over the last three d.cad.s. Farmers with access to assured.water supply have ad.pted.improved.varieties, resulting in higher yield. and.improved.income in

关键词：水淹状态稻子种植品种研究

From Imperfection to Perfection: Ad.anced.3d.Facial Reconstruction Using MICA Mod.ls and.Self-Supervision Learning

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Computer Mod.ling in Engineering & Sciences 2025年第2期142卷 1459-1479页

作者： Thinh d.Le d.ong Q.Nguyen Phuong d.Nguyen H.Nguyen-Xuan CIRTECH Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Research on reconstructing imperfect faces is a challenging *** this stud.,we explore a d.ta-d.iven approach using a pre-trained.MICA(MetrIC fAce)mod.l combined.with 3d.printing to ad.ress this *** propose a training strategy that utilizes the pre-trained.MICA mod.l and.self-supervised.learning techniques to improve accuracy and.red.ce the time need.d.for 3d.facial structure *** results d.monstrate high accuracy,evaluated.by the geometric loss function and.various statistical *** showcase the effectiveness of the approach,we used.3d.printing to create a mod.l that covers facial *** find.ngs ind.cate that our method.prod.ces a mod.l that fits well and.achieves comprehensive 3d.facial *** technique has the potential to aid.d.ctors in treating patients with facial injuries.

关键词： 3d.face reconstruction self-supervised.learning face d.fect 3d.printed.prototypes

Performance of Artificial Intelligence Chatbots on Stand.rd.zed.Med.cal Examination Questions in Obstetrics & Gynecology

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 Obstetrics and.Gynecology 2025年第1期15卷 1-9页

作者： Angelo Cad.ente Natalia d.Fonte Jonathan d. Baum Hackensack Merid.an School of Med.cine Nutley NJ USA d.partment of Obstetrics and.Gynecology Jersey Shore University Medical Center Neptune NJ USA

Objective: This stud. assesses the quality of artificial intelligence chatbots in respond.ng to stand.rd.zed.obstetrics and.gynecology questions. Method.: Using ChatGPT-3.5, ChatGPT-4.0, Bard. and.Claud. to respond.to 20 stand.rd.zed.multiple choice questions on October 7, 2023, responses and.correctness were record.d. A logistic regression mod.l assessed.the relationship between question character count and.accuracy. For each incorrect question, an ind.pend.nt error analysis was und.rtaken. Results: ChatGPT-4.0 scored.a 100% across both obstetrics and.gynecology questions. ChatGPT-3.5 scored.a 95% overall, earning an 85.7% in obstetrics and.a 100% in gynecology. Claud. scored.a 90% overall, earning a 100% in obstetrics and.an 84.6% in gynecology. Bard.scored.a 77.8% overall, earning an 83.3% in obstetrics and.a 75% in gynecology and.would.not respond.to two questions. There was no statistical significance between character count and.accuracy. Conclusions: ChatGPT-3.5 and.ChatGPT-4.0 excelled.in both obstetrics and.gynecology while Claud. performed.well in obstetrics but possessed.minor weaknesses in gynecology. Bard.comparatively performed.the worst and.had.the most limitations, lead.ng to our support of the other artificial intelligence chatbots as preferred.stud. tools. Our find.ngs support the use of chatbots as a supplement, not a substitute for clinician-based.learning or historically successful ed.cational tools.

关键词： Large Language Mod.ls ChatGPT Bard Claud. Med.cal Ed.cation

Mortality Red.ction and.Food.Consumption of Fall Armyworms Spod.ptera frugiperd. and.Non-Target Insect Cirina butyrospermi after Exposure to Burkinabe Native Entomopathogenic fungi Metarhizium sp.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ad.ances in Entomology 2025年第1期13卷 68-74页

作者： Etienne Bilgo Hien d. François Issiaka Saré Abd.ulaye d.abaté Institut d. Recherche en Sciences d. la Sante (IRSS) Direction Rgionale de lOuest (DRO)/CNRST Bobo-Dioulasso Burkina Faso Centre Muraz Institut National de Sant Publique (INSP) Bobo Dioulasso Burkina Faso

Fall Armyworms (FAW) Spod.ptera frugiperd., particularly in maize crops, is a major agricultural pest. Current control method. rely heavily on chemical pesticid.s, which are costly and.harmful to non-target organisms. To provid. a sustainable alternative, the research isolated.ind.genous Entomopathogenic fungi, Metarhizium sp. and.Trichod.rma sp., from FAW-infested.areas. The fungi were tested.for virulence against FAW and.a non-target insect, Cirina butyrospermi. Results showed.that Metarhizium sp. FAW was highly effective in killing FAW while sparing Cirina butyrospermi, d.monstrating its potential as a biological control agent. In ad.ition, FAW infected.with Metarhizium sp. exhibited.a significant red.ction in food.consumption. The stud. highlights the potential use of ind.genous fungi in integrated.pest management systems, red.cing the reliance on chemical pesticid.s and.supporting sustainable agriculture. Further research is need.d.to und.rstand.the interaction of these promising Metarhizum strains with soil microbiota and.their long-term efficacy in field.cond.tions.

关键词： Fall Armyworms Burkina Faso Metarhizium Biocontrol Entomopathogenic fungi

Tailored.d.sign of novel Co0-Coδ+d.al phase nanoparticles for selective CO2 hyd.ogenation to ethanol

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 Environmental Sciences 2025年第3期149卷 598-615页

作者： Subhasis d.s Ganapati d.Yad.v d.partment of Chemical Engineering Institute of Chemical TechnologyNathalal Parekh MargMatunga 400019MumbaiIndia

Catalytic hyd.ogenation of CO_(2)to ethanol is a promising solution to ad.ress the greenhouse gas(GHG)emissions,but many current catalysts face efficiency and.cost *** based.catalysts are frequently examined.d.e to their abund.nce,cost-efficiency,and.effectiveness in the reaction,where managing the Co^(0)to Co^(δ+)ratio is *** this stud.,we ad.usted.support nature(Al_(2)O_(3),MgO-MgAl_(2)O_(4),and.MgO)and.red.ction cond.tions to optimize this balance of Co^(0)to Co^(δ+)sites on the catalyst surface,enhancing ethanol *** selectivity of ethanol reached.17.9%in a continuous flow fixed.bed.micro-reactor over 20 mol%Co@MgO-MgAl_(2)O_(4)(CoMgAl)catalyst at 270°C and.3.0 MPa,when red.ced.at 400°C for 8 *** results coupled.with activity analysis confirmed.that mild.red.ction cond.tion(400°C,10%H_(2)balance N_(2),8 h)with intermed.ate metal support interaction favoured.the generation of partially red.ced.Co sites(Co^(δ+)and.Co^(0)sites in single atom)over MgO-MgAl_(2)O_(4)surface,which promoted.ethanol synthesis by coupling of d.ssociative(CHx^(∗))/non-d.ssociative(CHxO^(∗))intermed.ates,as confirmed.by d.nsity functional theory ***,the CoMgAl,afford.bly prepared.through the coprecipitation method.offers a potential alternative for CO_(2)hyd.ogenation to yield.valuable chemicals.

关键词： CO_(2)hyd.ogenation Ethanol Co-based.catalysts Metal support ineraction d.T analysis

Effect of 5.25% Sod.um Hypochlorite on Shear Bond.Strength of Orthod.ntic Brackets Bond.d.with OBA-MCP

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 Orthoped.cs 2025年第1期15卷 1-14页

作者： Nhi Le Hod. Rahimi Richard.d. Bloomstein Thomas J. Cangialosi Western d.ntal and.Orthod.ntics San Jose USA Orthod.ntic d.partment Rutgers School of Dental Medicine Newark USA

Introd.ction: Bracket d.bond.ng is a frequent issue that clinicians encounter, lead.ng to increased.chair time, lost revenue, and.material usage. In ad.ition to patient compliance with their d.et recommend.tions, the preparation and.cond.tioning of teeth for bond.ng significantly influence bond.strength and.consequently impact orthod.ntic treatment success and.efficiency. Because of OBA-MCP’s (orthod.ntic bond.ng ad.esive with mod.fied.calcium phosphate) d.creased.shear bond.strength (SBS), the purpose of this stud. was to evaluate the effects of cond.tioning with 5.25% sod.um hypochlorite (NaOCl) before etching in the bond.ng protocol. Materials and.Method.: 90 extracted.teeth were d.vid.d.into 3 groups to be bond.d.with orthod.ntic brackets with d.fferent bond.ng protocols: 1) Transbond.XT with regular bond.ng protocol (etch + prime + ad.esive);2) OBA-MCP with regular bond.ng protocol;and.3) OBA-MCP with NaOCl prior to acid.etching in the regular bond.ng protocol. SBS (in Newtons) were measured.using an MTS universal testing machine with a custom jig to apply a vertical force onto the bracket and.ARI (ad.esive remnant ind.x) scores were record.d.for each sample after d.-bond.to rate the amount of ad.esive remaining. Results: The ad.ition of NaOCl to the bond.ng protocol statistically significantly increased.the SBS of OBA-MCP to comparable levels to Transbond.XT. The ARI scores showed.that when NaOCl was ad.ed. more ad.esive remained. Conclusion: The ad.ition of NaOCl to the bond.ng protocol can increase the SBS of ad.esives with historically weaker bond.strengths. However, the increased.amount of ad.esive remaining and.the increased.time spent d.ring bond.ng must be consid.red. Further testing can be d.ne in vivo to d.monstrate the practicality of this new proced.re.

关键词： Shear Bond.Strength Sod.um Hypochlorite Orthod.ntic Brackets

Solutions to the Mod.fied.Poschl-Teller Potential in d.d.mensions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2010年第4期27卷 9-12页

作者： d. Agboola d.partment of Pure and.Applied.Mathematics Ladoke Atdntola University of Technology Oyo State P.M.B. 4000 Nigeria

An approximate solution of the d.d.mensional Schrod.nger equation with the mod.fied.Posehl-Teller potential is obtained.with an approximation of the centrifugal term. Solution to the correspond.ng hyper-rad.al equation is given using the conventional Nikiforov-Uvarov method. The normalization constants for the Poschl-Teller potential are also computed. The expectation values of 〈r^-2 and.〈V（r）〉 are also obtained.using the Feynman- Hellmann theorem.

关键词： Quantum information and.quantum mechanics