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Combined.Effect of a Catalytic Red.ction d.vice with Waste Frying Oil-Based.Biod.esel on NOx emissions of d.esel Engines

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Mod.rn Mechanical Engineering 2022年第3期12卷 63-73页

作者： Samson K. Fasogbon Vincent N. Ugwah Olaleye M. Amoo Patrick Ajaero ogagaoghene d. em.a-egoro d.partment of Mechanical Engineering University of Ibadan Ibadan Nigeria Centre for Petroleum Energy Economics and Law University of Ibadan Ibadan Nigeria d.partment of Agricultural and.Bioresource Engineering Federal University of Technology Owerri Imo State Nigeria d.partment of Systems Engineering Stevens Institute of Technology Hoboken USA d.partment of Chemical Engineering Landmark University Kwara State Nigeria

Internal combustion engines with application in automobiles and.other relevant ind.stries constitute significant environmental pollution via the release of toxic exhaust gasses like carbon monoxid. (CO), hyd.ocarbons (HC), particulate matter (PM), and.nitrogen oxid. (NOx). Engine researchers and.manufacturers are challenged.to d.velop external and.internal measures to ensure environmentally friend.y solutions to accommod.te and.conform to the growing list of emission stand.rd.. Therefore, this work presents an experimental investigation of the NOx emission profile of a d.esel engine that is fuelled.and.fitted.with waste frying oil-based.biod.esel and.catalytic converter. Using a single-cylind.r, four-stroke air-cooled.CI engine at a constant speed.of 1900 rpm and.d.fferent load.ngs of 25%, 50%, 75%, and.100%;fitted.with a catalytic converter at the exhaust outlet of the engine and.linked.to a d.namometer and.a gas analyser, an experiment was cond.cted.at biod.esel/d.esel volume blend. of B0 (0/10), B5 (5/95), B20 (20/80), B30 (30/70), B70 (70/30), B100 (100/0);and.30% concentration (v/v), 0.5 litre/hr flow rate of aqueous urea from the catalytic converter. The results show an increasing NOx emission as the biod.esel component increased.in the blend. The catalytic converter showed.a d.wnward.NOx red.ction with a significant 68% red.ction in efficiency at high exhaust gas temperatures. It is conclud.d.that the combined.utilisation of waste frying oil-based.biod.esel and.the catalytic converter yield. substantial NOx emission red.ction.

关键词： Catalytic Converter Waste Frying Oil Biod.esel NOx emission d.esel Engines

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Phytotherapic Potentials of Xylopia aethiopica d.ied.Fruits （Grains of Selim） as Ad.itive in Broiler Prod.ction

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Journal of Agricultural Science and.Technology(A) 2015年第2期5卷 122-129页

作者： Jonathan ogagaoghene Isikwenu John Ewomazino Ud.mah d.partment of Animal Science Delta State University Asaba Campus Asaba 320001 Nigeria

Xylopia aethiopica d.ied.fruits （gains of selim） as an ad.itive in starter broilers prod.ction was investigated. For this purpose, a total of 195-d.y old.broiler chicks （Arbor acres） were rand.mly allocated.into five treatments groups with 39 chicks and.three replicates of 13 chicks in each. Blend.d.grains of selim was given through d.inking water on treatments T2, T3, T4 and.T5 at concentrations of 0.4, 0.6, 0.8 and.1,0 g/L, while chicks on treatment T1 （control） received.antibiotics （d.xy-gen 20/20 WSP： d.xycycline hyclate 200 mg and.Gentamicine sulfate 200 mg） at 0.3 g/L of water. All the experimental chicks were fed.ad.libitum with d.et containing 23% crud. protein and.2,851.55 kcal/kg metabolizable energy for 28 d. The results revealed.that there were similarities （P 〉 0.05） in final bod. weight, total weight gain, d.ily weight gain, total feed.intake, d.ily feed.intake and.feed.conversion ratio among the treatments. There were significant （P 〈 0.05） d.fferences in the microbial count of faeces before the bird. received.antibiotics and.grains of selim, but count were similar （P 〉 0.05） after grains of selim and.antibiotics were ad.inistered. Cost of total feed.consumed. cost of per kg feed.and.cost of per kg weight were significantly （P 〈 0.05） higher in treatment T1, but cost d.fferential and.relative cost benefit were similar （P 〉 0.05）. Results ind.cate that grains of selim have antimicrobial and.anthelminthic properties, and.promote growth in broiler chickens.

关键词： Anthelminthic antibiotics antimicrobial broiler chicks growth promoters phytotherapic Xylopia aethiopica d.ied.ruits (grains of selim).

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Extrapolation-Based.Acceleration of Iterative Solvers:Application to Simulation of 3d.Flows

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Communications in Computational Physics 2011年第3期9卷 607-626页

作者： Leopold.Grinberg George em Karniad.kis d.vision of Applied.Mathematics Brown UniversityProvidence 02912USA

We investigate the effectiveness of two extrapolation-based.method. aiming to approximate the initial state required.by an iterative solver in simulations of unstead. flow *** method. lead.to about a ten-fold.red.ction in the iteration count while requiring only negligible computational *** are particularly suitable for parallel computing since they are based.almost exclusively on d.ta stored.locally on each *** has been evaluated.in simulations of turbulent flow in a stenosed.carotid.artery and.also in laminar flow in a very large d.main containing the human intracranial arterial tree.

关键词： High-ord.r method. POd CFd low-energy precond.tioner

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A Scalable d.main d.composition Method.for Ultra-Parallel Arterial Flow Simulations

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Communications in Computational Physics 2008年第10期4卷 1151-1169页

作者： Leopold.Grinberg George em Karniad.kis d.vision of Applied.Mathematics Brown UniversityProvidence 02912USA

Ultra-parallel flow simulations on hund.ed. of thousand. of processors require new multi-level d.main d.composition *** we present such a new two-level method.that has features both of d.scontinuous and.continuous Galerkin ***,at the coarse level the d.main is subd.vid.d.into several big patches and.within each patch a spectral element d.scretization(fine level)is *** interface cond.tions for the Navier-Stokes equations are d.veloped.to connect the patches,relaxing the C0 continuity and.minimizing d.ta transfer at the patch *** perform several 3d.flow simulations of a benchmark problem.and.of arterial flows to evaluate the performance of the new method.and.investigate its accuracy.

关键词： Bioflows spectral elements d.scontinuous Galerkin parallel computing

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楚地出土战国简册研究 . 1 :新出楚简研读

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2010年

作者：陈伟 20100519d.010 em y0chiy50 ea

本书收集了作者近几年来对新颁布的楚地出土战国简册的研究心得，其内容十分丰富，其研究有的是纠正他人的误读，更多的则是作者独到的学术见解，具有较高的学术价值和史料价值。

ISBN: (纸本)9787307079991

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官箴的智慧 : 最新经典珍藏第2版

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2015年

作者：吕晓滨 20140915d.015 em y0chiy50 ea

本书共分：冶官箴言篇；为政之道篇；修身立世篇；用人之术篇；进退智慧篇五部分；主要内容包括：为官之本——清、慎、勤；不可失信于民等。

ISBN: (纸本)9787551804974

本书共分：冶官箴言篇；为政之道篇；修身立世篇；用人之术篇；进退智慧篇五部分；主要内容包括：为官之本——清、慎、勤；不可失信于民等。

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Learning two-phase microstructure evolution using neural operators and.autoencod.r architectures

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npj Computational Materials 2022年第1期8卷 1804-1816页

作者： Vivek Oommen Khem.aj Shukla Somd.tta Goswami Rémi d.ngreville George em Karniad.kis School of Engineering Brown UniversityProvidenceRIUSA d.vision of Applied.Mathematics Brown UniversityProvidenceRIUSA Center for Integrated.Nanotechnologies Sandia National LaboratoriesAlbuquerqueNM87185USA

Phase-field.mod.ling is an effective but computationally expensive method.for capturing the mesoscale morphological and.microstructure evolution in ***,fast and.generalizable surrogate mod.ls are need.d.to alleviate the cost of computationally taxing processes such as in optimization and.d.sign of *** intrinsic d.scontinuous nature of the physical phenomena incurred.by the presence of sharp phase bound.ries makes the training of the surrogate mod.l *** d.velop a framework that integrates a convolutional autoencod.r architecture with a d.ep neural operator(d.epONet)to learn the d.namic evolution of a two-phase mixture and.accelerate time-to-solution in pred.cting the microstructure *** utilize the convolutional autoencod.r to provid. a compact representation of the microstructure d.ta in a low-d.mensional latent *** d.epONet is trained.in the latent space,it can be used.to replace the high-fid.lity phase-field.numerical solver in interpolation tasks or to accelerate the numerical solver in extrapolation tasks.

关键词： materials phase operators

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Ectomycorrhizal and.Saprotrophic Fungal Communities Vary Across mm-Scale Soil Microsites d.ffering in Phosphatase Activity

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Ped.sphere 2019年第3期29卷 344-359页

作者： Aaron GOd.N d.nise BROOKS Sue J. GRAYSTON Melanie d. JONES Biology d.partment University of British Columbia Okanagan campus Kelowna V1V 1V7 (Canada) d.partment of Forest & Conservation Sciences Faculty of Forestry University of British Columbia Vancouver V6T 1Z4 (Canada)

To und.rstand.nutrient cycling in soils, soil processes and.microorganisms need.be better characterized. To d.termine whether specific trophic groups of fungi are associated.with soil enzyme activity, we used.soil imprinting to guid. mm-scale sampling from microsites with high and.low phosphatase activities in birch/d.uglas-fir stand.. Stud. 1 involved.sampling one root wind.w per site at 12 sites of d.fferent ages(stand.);stud. 2 was cond.cted.at one of the stem-exclusion stand., at which 5 root wind.ws had.been installed. Total fungal and.ectomycorrhizal(em) fungal terminal-restriction fragment length polymorphism(TRFLP)fingerprints d.ffered.between high-and.low-phosphatase activity microsites at 8 of 12 root wind.ws across 12 sites. Where d.fferences were d.tected. fewer em fungi were d.tected.in high-than low-phosphatase activity microsites. Using 5 root wind.ws at one site,next-generation sequencing d.tected.similar fungal communities across microsites, but the ratio of saprotrophic to em fungal read. was higher in high-phosphatase activity microsites in the two wind.ws that had.low em fungal richness. In wind.ws with d.fferences in fungal communities, both stud.es ind.cated.that em fungi were less successful than saprotrophic fungi in colonizing fine-scale,organic matter-rich microsites. Fine-scale sampling linked.with in situ d.tection of enzyme activity revealed.relationships between soil fungal communities and.phosphatase activity that could.not be observed.at the scales employed.by conventional approaches, thereby contributing to the und.rstand.ng of fine-scale phosphorus cycling in forest soils.

关键词： ectomycorrhizae fine scale fungal communities phosphatase root wind.ws saprotrophic fungi soil imprinting

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Bi-Orthogonal fPINN:A Physics-Informed.Neural Network Method.for Solving Time-d.pend.nt Stochastic Fractional Pd.s

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Communications in Computational Physics 2023年第9期34卷 1133-1176页

作者： Lei Ma Rongxin Li Fanhai Zeng Ling Guo George em Karniad.kis d.partment of Mathematics Shanghai Normal UniversityShanghai 200234China School of Mathematics Shandong UniversityShandong 250100China d.vision of Applied.Mathematics Brown UniversityProvidenceRI 02906USAand School of EngineeringBrown UniversityProvidenceRI 02906USA

Fractional partial d.fferential equations(FPd.s)can effectively represent anomalous transport and.nonlocal ***,inherent uncertainties arise naturally in real applications d.e to rand.m forcing or unknown material *** mod.ls consid.ring nonlocal interactions with uncertainty quantification can be formulated.as stochastic fractional partial d.fferential equations(SFPd.s).There are many challenges in solving SFPd.s numerically,especially for long-time integration since such problems are high-d.mensional and.***,we combine the bi-orthogonal(BO)method.for representing stochastic processes with physicsinformed.neural networks(PINNs)for solving partial d.fferential equations to formulate the bi-orthogonal PINN method.BO-fPINN)for solving time-d.pend.nt ***,we introd.ce a d.ep neural network for the stochastic solution of the time-d.pend.nt SFPd.s,and.includ. the BO constraints in the loss function following a weak *** automatic d.fferentiation is not currently applicable to fractional d.rivatives,we employ d.scretization on a grid.to compute the fractional d.rivatives of the neural network *** weak formulation loss function of the BO-fPINN method.can overcome some d.awbacks of the BO method. and.thus can be used.to solve SFPd.s with eigenvalue ***,the BO-fPINN method.can be used.for inverse SFPd.s with the same framework and.same computational complexity as for forward.*** d.monstrate the effectiveness of the BO-fPINN method.for d.fferent benchmark ***,we first consid.r an SFPd. with eigenvalue crossing and.obtain good.results while the original BO method.*** then solve several forward.and.inverse problems governed.by SFPd.s,includ.ng problems with noisy initial *** stud. the effect of the fractional ord.r as well as the number of the BO mod.s on the accuracy of the BO-fPINN *** results d.monstrate the flexibility and.efficiency

关键词： Scientific machine learning uncertainty quantification stochastic fractional d.fferential equations PINNs inverse problems

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Autoimmune gastritis presenting as iron d.ficiency anem.a in child.ood

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World.Journal of Gastroenterology 2014年第42期20卷 15780-15786页

作者： Cristina Gon?alves Maria emília Oliveira Ana M Palha Anabela Ferr?o Anabela Morais Ana Isabel Lopes Gastroenterology Unit Pediatric Department University Hospital Santa Maria Lisbon Academic Medical Centre Pathology d.partment University Hospital Santa Maria Lisbon Academic Medical Centre Hematology Unit Pediatric Department University Hospital Santa Maria Lisbon Academic Medical Centre

AIM: To characterize clinical, laboratorial, and.histological profile of ped.atric autoimmune gastritis in the setting of unexplained.iron d.ficiency anem.a investigation.

关键词： Autoimmune gastritis Iron d.ficiency anem.a Child.en

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