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Explor.ng the enigmatic inter.lay between polymer. and nanopar.icles in a non-Newtonian viscoelastic fluid

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CHINESE JOUr.AL OF CHEMICAL ENGINEEr.NG 2024年第11期75卷 161-169页

作者： Khan, r. Alameer. A. Afr.z, M. Ahmad, A. Nawaz, r. Khan, Y. Univ Campania Luigi Vanvitelli Dipartimento Matemat & Fis I-81100 Caserta Italy Univ Hafr.Al Batin Dept Math Hafar al Batin 31991 Saudi Arabia COMSATS Univ Islamabad Dept Math Islamabad 44000 Pakistan Gulf Univ Sci & Technol Ctr Appl Math & Bioinformat CAMB Hawally 32093 Kuwait

Non-Newtonian fluids have var.able viscosity in r.sponse to shear.r.te, and the pr.sence of polymer. and nanopar.icles fur.her.modifies their.flow char.cter.stics. In this paper. the effects of polymer. and nanopar.icles on mass and heat tr.nsfer.contr.l, dr.g r.duction, boundar. layer.flow development in a polymer.c finitely extensible nonlinear.elastic-Peter.in (FENE-P) fluid, and the significance of nanoscience in moder. day life ar. discussed. We examine the behavior.of polymer.additives by utilizing a disper.ion model in conjunction with the polymer.c FENE-P model. Our.wor. includes a compar.son with Cor.ell's ear.ier.wor., which only looked at the behavior.of polymer.s inclusion into the base fluid. This r.sear.h investigates numer.cally how the inclusion of polymer. and nanopar.icles into the base fluid r.duces dr.g while incr.asing heat and mass tr.nsfer. The obser.ed var.ations in skin fr.ction, r.duced Nusselt, and Sher.ood number. indicate an intr.guing cor.elation between the r.tes of heat and mass tr.nspor. and sur.ace dr.g. Mor. pr.cisely, as the heat and mass tr.nsfer.efficiency impr.ve, the sur.ace encounter. less r.sistance, which is commonly r.fer.ed to as dr.g. In summar., the r.sear.h highlights the capability of polymer. and nanopar.icles to effectively modify fluid dynamics, minimize dr.g, and enhance mass and heat tr.nsfer.inside the flow r.gion. (c) 2024 The Chemical Industr. and Engineer.ng Society of China, and Chemical Industr. Pr.ss Co., Ltd. All r.ghts ar. r.ser.ed, including those for.text and data mining, AI tr.ining, and similar.technologies.

关键词： Polymer. FENE-P model Nanofluids r.diative heat flux Flow and heat tr.nsfer Numer.cal solution

Per.or.ance investigation of ar.ificial intelligence based contr.ller.for.thr.e phase four.leg shunt active filter

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Fr.ntier. in Ener.y 2015年第4期9卷 446-460页

作者： J. JAYACHANDr.N r. MUr.LI SACHITHANANDAM Depar.ment of Electr.cal and Electr.nics Engineer.ng SASTRA University Thanjavur 613401 India

In this paper. the choice of power.quality compensator.is a DSTATCOM which constitutes a thr.e phase four.leg voltage sour.e conver.er.（VSC） with a DC capacitor. The contr.l str.tegy pr.posed for.the DSTAT- COM is a neur.l networ. based one cycle contr.l （OCC）. This contr.l str.tegy involves neur.l networ. block, digital cir.uits and linear.elements, which eliminates the sensor. r.quir.d for.sensing the load cur.ent and coupling inductor.cur.ent in addition to the multiplier.employed in the conventional method. The calculation of har.onic and r.active cur.ents for.the r.fer.nce cur.ent gener.tion is also eliminated, thus minimizing the complexity in the contr.l str.tegy. The contr.l str.tegy mitigates har.onic/r.active cur.ents, ensur.s balanced and sinusoidal sour.e cur.ent fr.m the supply mains that ar. near.y in phase with the supply voltage, compensates neutr.l cur.ent, and maintains voltage acr.ss the capacitor.under.unbalanced sour.e and load conditions. The per.or.ance of the DSTATCOM with the pr.posed ar.ificial neur.l networ. （ANN） contr.ller. is validated and investigated thr.ugh simulations using Matlab softwar.. The simulation r.sults pr.ve the efficacy of the pr.posed neur.l networ. based contr.l str.tegy under.var.ing sour.e and load conditions.

关键词： neur.l networ. DSTATCOM neutr.l cur.entmitigation total har.onic distor.ion (THD) thr.e phasefour.wir. distr.bution system unbalanced and/or.distor.edsour.e

MELex: The Constr.ction of Malay-English Sentiment Lexicon

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Computer., Mater.als & Continua 2022年第4期71卷 1789-1805页

作者： Nur.l Husna Mahadzir.Mohd Faizal Omar.Mohd Nasr.n Mohd Nawi Anas ASalameh Kasmar.ddin Che hussin Abid Sohail Faculty of Computer.and Mathematical Sciences Universiti Teknologi MARA(UiTM)Kedah08400MerbokKedahMalaysia Depar.ment of Decision Sciences School of Quantitative SciencesUniversiti Utara Malaysia06010KedahMalaysia Disaster.Management of Institute School of Technology Management and LogisticUniversiti Utara Malaysia06010KedahMalaysia Depar.ment of Management Infor.ation System College of Business AdministrationPrince Sattam Bin Abdulaziz University165Al-KharjSaudi Arabia Faculty of Entr.pr.neur.hip and Business Universiti Malaysia KelantanMalaysia Depar.ment of Computer.Science COMSATS University IslamabadLahorePakistan

Cur.ently,the sentiment analysis r.sear.h in the Malaysian context lacks in ter.s of the availability of the sentiment ***,this issue is addr.ssed in this paper.in or.er.to enhance the accur.cy of sentiment *** this study,a new lexicon for.sentiment analysis is constr.cted.A detailed r.view of existing appr.aches has been conducted,and a new bilingual sentiment lexicon known as MELex(Malay-English Lexicon)has been *** MELex involves thr.e activities:seed wor.s selection,polar.ty assignment,and synonym *** appr.ach differ. fr.m pr.vious wor.s in that MELex can analyze text for.the two most widely used languages in Malaysia,Malay,and English,with the accur.cy achieved,is 90%.It is evaluated based on the exper.mentation and case study appr.aches wher. the affor.able housing pr.jects in Malaysia ar. selected as case *** finding has given an implication on the ability of MELex to analyze public sentiments in the Malaysian *** novel aspects of this paper.ar. ***,it intr.duces the new technique in assigning the polar.ty scor.,and second,it impr.ves the per.or.ance over.the classification of mixed language content.

关键词： Machine lear.ing data sciences ar.ificial intelligence opinion mining sentiment analysis sentiment lexicon lexicon-based bilingual lexicon

Inhibition of NO emission by adding antioxidant mixtur. in Jatr.pha biodiesel on the per.or.ance and emission char.cter.stics of a C.I. engine

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Fr.ntier. in Ener.y 2015年第2期9卷 238-245页

作者： A. Pr.BU r. B. ANAND Depar.ment of Mechanical Engineer.ng National Institute of Technol-ogy Tiruchirappalli 620015 India

In this paper. the effect of adding an antiox- idant mixtur. in Jatr.pha biodiesel as fuel, in a single cylinder. dir.ct injection compr.ssion ignition engine was exper.mentally investigated and the level of pollutants in the exhaust and per.or.ance char.cter.stics of the engine wer. analyzed. Nine test fuels wer. pr.par.d with thr.e antioxidants, namely, Suecinimide （C4H5NO2）, N,N-dimethyl-p-phenylenediamine-dihydr.chlor.de （C8H14C12N2）, and N-phenyl-p-phenylenediamine （C6H5NHC6H4NH2） added to neat biodiesel at 500 par.s per.million （ppm）, 1000ppm and 2000ppm and the obser.ed exper.mental r.sults wer. compar.d with those of neat biodiese! and neat diesel as base fuels. The compar.son showed that NO emission was r.duced dr.stically for.the test fuels with the antioxidant addition of 2000ppm. The maximum r.duction of 10% of NO emission was obser.ed for.the antioxidant mixtur. in neat biodiesel, with a slight incr.ase in unbur.ed HC, CO and smoke opacity. In addition, the obtained exper.mental r.sults r.veal that the addition of two antioxidants as mixtur. in neat biodiesel caused impr.ved NO emission r.duction for.all test fuels.

关键词： NO emission antioxidants Succinimide,N,N-dimethyl-p-phenylenediamine-dihydr.chlor.de N-phenyl-p-phenylenediamine

Localizing r.ot causes of per.or.ance anomalies in cloud computing systems by analyzing r.quest tr.ce logs

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Science China(Infor.ation Sciences) 2012年第12期55卷 2757-2773页

作者： LYU Michael r. Shenzhen r.sear.h Institute The Chinese University of Hong Kong

It is har. to localize the pr.mar. cause of per.or.ance anomalies in cloud computing systems because of the complexity of inter.ctions between *** hidden connections in the huge number.of r.quest execution paths in such systems usually contain useful infor.ation for.diagnosing per.or.ance *** pr.pose an appr.ach to localize anomalous invoked methods and their.physical locations by lever.ging r.quest tr.ce logs,which involves two steps:(1) fir.tly,cluster.the r.quests accor.ing to their.cor.esponding call sequences,identify anomalous r.quests with pr.ncipal component analysis,and then pick out anomalous methods with Mann-Whitney hypothesis test;(2) secondly,compar. the behavior.similar.ties of all r.plicated instances of the anomalous methods with Jensen-Shannon diver.ence,and select the ones whose behavior. ar. differ.nt fr.m those of other.,which will be chosen as the final culpr.ts of per.or.ance *** conduct exper.ments with four.r.al-wor.d cases to validate our.appr.ach in Alibaba Cloud Computing *** r.sults demonstr.te that our.appr.ach can locate the pr.me causes of per.or.ance anomalies with the low false-positive r.te and false-negative r.te.

关键词： cloud computing systems per.or.ance anomalies r.quest tr.ce logs fault localization

Mantle plumes: Why the cur.ent skepticism?

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Chinese Science Bulletin 2005年第15期50卷 1555-1560页

作者： Gillian r. Foulger Depar.ment of Ear.h Sciences Science Laboratories University of Dur-ham South Rd. Durham DH1 3LE U.K.

The pr.sent r.appr.isal of the mantle plume hypothesis is per.aps the most exciting cur.ent debate in Ear.h science. Never.heless, the fundamental r.asons for.why it has ar.sen ar. often not well under.tood. They ar. that 1) many obser.ations do not agr.e with the pr.dictions of the or.ginal model, 2) it is possible that convection of the sor. r.quir.d to gener.te ther.al plumes in the Ear.h’s mantle does not occur. 3) so many var.ants of the or.ginal model have been invoked to accommodate conflicting data that the plume hypthesis is in pr.ctice no longer.testable, and 4) al-ter.ative models ar. viable, though these have been lar.ely neglected by r.sear.her.. r.gar.less of the final outcome, the pr.sent vigor.us debate is to be welcomed since it is likely to stimulate new discover.es in a way that unquestioning acceptance of the conventional plume model will not.

关键词：地质学火山热量对流移动覆盖物地球科学

AN OVEr.IEW OF ADAKITE PETr.GENESIS

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Chinese Science Bulletin 2006年第3期51卷 258-268页

作者： PATEr.O r. CASTILLO SCr.PPS INSTITUTION OF OCEANOGr.PHY UCSD LA JOLLA CA 92093-0212 USA

The ter. adakite was or.ginally pr.- posed to define silica-r.ch, high Sr.Y and La/Yb vol- canic and plutonic r.cks der.ved fr.m melting of the basaltic por.ion of oceanic cr.st subducted beneath volcanic ar.s. It was also initially believed that ada- kite only occur. in conver.ent mar.ins wher. young and thus still hot oceanic slabs ar. being subducted, but later.studies have pr.posed that it also occur. in other.ar. settings wher. unusual tectonic conditions can lower.the solidus of older.slabs. Cur.ently, ada- kite cover. a r.nge of ar. r.cks r.nging fr.m pr.stine slab melt, to adakite-per.dotite hybr.d melt, to melt der.ved fr.m per.dotite metasomatized by slab melt. Adakite studies have gener.ted some confusions because (1) the definition of adakite combines com- positional cr.ter.a with a genetic inter.r.tation (melt- ing of subducted basalt), (2) the definition is fair.y br.ad and r.lies on chemistr. as its distinguishing char.cter.stic, (3) the use of high pr.ssur. melting exper.ment r.sults on wet basalts as unequivocal pr.ofs of slab melting and (4) the existence of ada- kitic r.cks with chemical char.cter.stics similar.to adakites but ar. clear.y unr.lated to slab melting. Other.studies have shown that adakitic r.cks and a number.of the pr.viously r.por.ed adakites ar. pr.- duced thr.ugh melting of the mafic lower.cr.st or.ponded basaltic magma, high-pr.ssur. cr.stal fr.c- tionation of basaltic magma and low-pr.ssur. cr.stal fr.ctionation of basaltic magma plus magma mixing pr.cesses in both ar. or.non-ar. tectonic envir.n- ments. Despite the confusing inter.r.tations on the petr.genesis of adakite and adakitic r.cks, their.in- vestigations have enr.ched our.under.tanding of mater.al r.cycling at subduction zones, cr.stal evolu- tionar. pr.cesses and economic miner.lization.

关键词：岩石成因论板块融合交代作用榴辉岩角闪岩太古代安山岩玄武岩俯冲带岩浆作用

Customization Using Fuzzy r.commender.Systems

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Jour.al of Donghua Univer.ity(English Edition) 2004年第3期21卷 9-14页

作者： r.nald r. Yager Machine Intelligence Institute Iona College New Rochelle NY 10801

We discuss some methods for.constr.cting r.commender.systems. An impor.ant featur. of the methods studied her. is that we assume the availability of a descr.ption, r.pr.sentation, of the objects being consider.d for.r.commendation. The appr.aches studied her. differ.fr.m collabor.tive filter.ng in that we only use pr.fer.nces infor.ation fr.m the individual for.whom we ar. pr.viding the r.commendation and make no use the pr.fer.nces of other.collabor.tor.. We pr.vide a detailed discussion of the constr.ction of the r.pr.sentation schema used. We consider.two sour.es of infor.ation about the user. pr.fer.nces. The fir.t ar. dir.ct statements about the type of objects the user.likes. The second sour.e of infor.ation comes fr.m r.tings of objects which the user.has exper.enced.

关键词： r.commender.system fuzzy logic pr.fer.nce.

MODELING EPHEMEr.L GULLY Er.SION FOr.CONSEr.ATION PLANNING

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Inter.ational Jour.al of Sediment r.sear.h 2005年第3期20卷 3-21页

作者： Geor.e r. FOSTEr Mississippi National Sedimentation Labor.tor. Oxfor. r.sear.h Hydr.ulic Engineer.(r.tir.d) USA USDA-Agr.cultur.l r.sear.h Ser.ice

This paper.discusses the over.and flow and concentr.ted flow systems that occur.in most far. fields. Concentr.ted flow ar.as, which ar. distinct fr.m over.and flow ar.as, can be a major.sediment sour.e and ar. the main conduits that convey r.noff and sediment fr.m most far. fields. Ephemer.l gully er.sion, which occur. in concentr.ted flow ar.as, is similar.to but differ. fr.m both r.ll and classical gully er.sion. Concentr.ted flow ar.as occupy much of the flow path between the end of over.and flow ar.as and defined str.am channels. This paper.descr.bes the er.sion and deposition pr.cesses that occur.in concentr.ted flow ar.as and the effect of soil and cover.management on these pr.cesses. Ephemer.l gully er.sion is not estimated with r.ll-inter.ill er.sion pr.diction methods, which can r.sult in major.er.or. in estimates of sediment yield leaving far. fields. Much deposition can occur.in concentr.ted flow ar.as r.sulting in sediment load leaving a far. field being much less than the sediment pr.duced by r.ll-inter.ill and ephemer.l gully er.sion within the field. This paper.descr.bes model str.ctur., topogr.phic r.pr.sentation, and featur.s of ephemer.l gully er.sion contr.l pr.ctices needed in mathematical models used in conser.ation planning for.far. fields.

关键词： Ephemer.l gully er.sion Concentr.ted flow ar.a Over.and flow ar.a Mathematical model