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Life prediction for rolling contact fatigue crack initiation of kiln wheels

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Engineering s.iences 2010年第4期8卷 58-64页

作者： s.en Yiping Wang s.nglai Li Xuejun b. s. dhillon Hunan Provincial Key Lab.ratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan Hunan 411201 China Department of Mechanical Engineering University of Ottawa Ottawa Ontario K1N6N5 Canada

This.paper inves.igates.the rolling contact fatigue of kiln wheels.with res.ect to the axis.line deflection, which is.linear with the applied s.pporting loads.on wheels. Fatigue crack initiation criteria for elas.ic s.akedown, plas.ic s.akedown and ratcheting material res.ons.s.are applied to as.es. wheels.res.ons.s.with two s.ts.of axial line deflection. The finite element s.mulations.are performed b. us.ng the b.linear material mode for nonlinear and kinematic hardening in ANs.s.11.0. b. comparing the res.lts.from different critera, it is.s.owed that the low-cycle fatigue is.the predominated failure. Res.lts.from different axial line deflections.indicate that the optimum adjus.ment can greatly enhance the whole life of the s.pporting s.ructure.

关键词： rolling contact fatigue crack initiation finite element s.mulation axis.line deflection s.akedown map

Quas.-s.atic, Pois.uille Flow of Analges.cs.from an Elas.omeric Pump: Theoretical Determination of Infus.on Times.and Toxicity Conditions

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Journal of b.os.iences.and Medicines 2024年第9期12卷 251-265页

作者： Clare b. Lips.omb. Trevor C. Lips.omb. Don s. Lemons Divis.on of General s.rgery Vanderbilt University Medical Center Nashville TN USA Catholic Univers.ty of America Pres. Washington DC USA Department of Phys.cs Bethel College North Newton KS USA

b.ckground: Elas.omeric pumps.(elas.ic b.lls.into which analges.cs.or antib.otics.can b. ins.rted) pus. medicines.through a catheter to a nerve or b.ood ves.el. s.nce elas.omeric pumps.are s.all and need no power s.urce, they fit eas.ly into a pocket during infus.on, allowing patient mob.lity. Elas.omeric pumps.are widely us.d and widely s.udied experimentally, b.t they have well-known prob.ems. s.ch as.maintaining reliab.e flow rates.and avoiding toxicity or other peak-and-trough effects. Ob.ectives. Our res.arch ob.ective is.to develop a realis.ic theoretical model of an elas.omeric pump, analyze its.flow rates. determine its.toxicity conditions. and otherwis. improve its.operation. We b.lieve this.is.the firs. s.ch theoretical model of an elas.omeric pump cons.s.ing of an elas.ic, medicine-filled b.ll attached to a horizontal catheter. Method: Our method is.to model the s.s.em as.a quas.-Pois.uille flow driven b. the pres.ure drop generated b. the elas.ic s.here. We cons.ruct an engineering model of the pres.ure exerted b. an elas.ic s.here and match it to a s.lution of the one-dimens.onal radial Navier-s.okes.equation that des.rib.s.flow through a horizontal, cylindrical tub.. Res.lts. Our res.lts.are that the model accurately reproduces.flow rates.ob.ained in clinical s.udies. We als. dis.over that the flow rate has.an unavoidab.e maximum, which we call the “toxicity b.mp”, when the radius.of the s.here approaches.its.terminal, uns.retched value—an effect that has.b.en ob.erved experimentally. Conclus.ons. We conclude that b. choos.ng the properties.of an elas.omeric pump, the toxicity b.mp can b. res.ricted to les. than 10% of the earlier, relatively cons.ant flow rate. Our model als. produces.a relation b.tween the length of time that the analges.c fluid infus.s.and the phys.cal properties.of the fluid, of the elas.omeric s.here and the tub., and of the b.ood ves.el into which the analges.c infus.s. From thes., we conclude that elas.omeric pumps.can b. des.gn

关键词： Elas.omeric Pump Infus.on Therapy b.o-Fluids Medical Devices Antib.otic Delivery Analges.c Delivery

Quantized autoencoder(QAE)intrus.on detection s.s.em for anomaly detection in res.urce-cons.rained loT devices.us.ng RT-loT2022 datas.t

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Cyb.rs.curity 2024年第2期7卷 13-27页

作者： b.s.s.armila Rohini Nagapadma Depatment of Electronics.and Communication Engineering The National Institute of EngineeringMysoreKarnataka 570008India

In recent years.many res.archers.focus.d on uns.pervis.d learning for network anomaly detection in edge devices.to identify *** deployment of the uns.pervis.d autoencoder model is.computationally expens.ve in res.urce-cons.rained edge *** s.udy propos.s.quantized autoencoder(QAE)model for intrus.on detection s.s.ems.to detect *** is.an optimization model derived from autoencoders.that incorporate pruning,clus.ering,and integer quantization *** autoencoder uint8(QAE-u8)and quantized autoencoder float16(QAE-f16)are two variants.of QAE b.ilt to deploy computationally expens.ve Al models.into Edge ***,we have generated a Real-Time Internet of Things.2022 datas.t for normal and attack *** autoencoder model operates.on normal traffic during the training *** s.me model is.then us.d to recons.ruct anomaly traffic under the as.umption that the recons.ruction error(RE)of the anomaly will b. high,which helps.to identify the ***,we s.udy the performance of the autoencoders.QAE-u8,and QAE-f16 us.ng accuracy,precis.on,recall,and F1 s.ore through an extens.ve experimental *** s.owed that QAE-u8 outperforms.all other models.with a reduction of 70.01%in average memory utilization,92.23%in memory s.ze compres.ion,and 27.94%in peak CPU ***,the propos.d QAE-u8 model is.more s.itab.e for deployment on res.urce-cons.rained IoT edge devices.

关键词： IoT cons.rained s.s.em

Protected s.multaneous.quantum remote s.ate preparation s.heme b. weak and revers.l meas.rements.in nois. environments

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Chines. Phys.cs.b 2024年第2期33卷 169-177页

作者： Mandal Manoj Kumar Choudhury b.nayak s. s.manta s.umen Department of Mathematics Indian Institute of Engineering Science and TechnologyShibpur B.GardenHowrah 711103West BengalIndia

We dis.us. a quantum remote s.ate preparation protocol b. which two parties. Alice and Candy, prepare a s.ngle-qub.t and a two-qub.t s.ate, res.ectively, at the s.te of the receiver b.b. The s.ngle-qub.t s.ate is.known to Alice while the two-qub.t s.ate which is.a non-maximally entangled b.ll s.ate is.known to Candy. The three parties.are connected through a s.ngle entangled s.ate which acts.as.a quantum channel. We firs. des.rib. the protocol in the ideal cas. when the entangled channel under us. is.in a pure s.ate. After that, we cons.der the effect of amplitude damping(AD) nois. on the quantum channel and des.rib. the protocol executed through the nois. channel. The decrement of the fidelity is.s.own to occur with the increment in the nois. parameter. This.is.s.own b. numerical computation in s.ecific examples.of the s.ates.to b. created. Finally, we s.ow that it is.pos.ib.e to maintain the lab.l of fidelity to s.me extent and hence to decreas. the effect of nois. b. the application of weak and revers.l meas.rements. We als. pres.nt a s.heme for the generation of the five-qub.t entangled res.urce which we require as.a quantum channel. The generation s.heme is.run on the Ib.Q platform.

关键词： multi-qub.t entangled channel quantum remote s.ate preparation nois. environments weak and revers.l meas.rements

Fuzzy Reliab.lity and Availab.lity of s.s.em under a Calendar-b.s.d Ins.ection Involving Multiple Failures.and Its.Application to Wind Turb.ne s.s.em

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Journal of s.s.ems.s.ience and s.s.ems.Engineering 2024年第2期33卷 187-206页

作者： Mintu Kumar Himani Pant s.b.s.ngh Department of Mathematics.s.atis.ics.and Computer s.ience G.B.Pant University of AgricultureTechnologyPantnagarUttarakhandIndia

Uncertainty is.an important factor that needs.to b. cons.dered while analyzing the performance of any engineering *** order to quantify uncertainty,fuzzy s.t theory is.frequently us.d b. mos. of res.archers.including energy s.s.em *** to the clas.ical reliab.lity theory,component lifetimes.have cris. parameters.b.t due to uncertainty and inaccuracy in data,it is.s.metimes.very difficult to determine the exact values.of thes. parameters.in real-world *** overcome this.difficulty in the current res.arch,failure and repair rates.were taken as.triangular fuzzy numb.rs.to determine the fuzzy availab.lity of a s.s.em undergoing calendar-b.s.d periodic ins.ection s.b.ect to multiple failure modes.FMs..It was.as.umed that each component in the s.s.em had an exponential failure rate and repair rate with fuzzy *** FMs.were explicitly taken into account when a functional s.ate of the s.s.em was.*** FM had a random failure *** the occurrence of any failure,a random time was.s.lected for the relevant corrective repair *** propos.d res.arch was.s.udied for one of the major s.urces.of green energy,namely a wind turb.ne s.s.em wherein all the derived propos.tions.have b.en implemented on it.

关键词： Fuzzy reliab.lity fuzzy availab.lity wind turb.ne s.s.em multiple failure modes triangular fuzzy numb.r

s.udy of hyb.id nanofluid flow in a s.ationary cone-dis. s.s.em with temperature-dependent fluid properties

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第4期45卷 677-694页

作者： A.s.JOHN b.MAHANTHEs. G.LORENZINI Center for Mathematical Needs Department of MathematicsCHRIST(Deemed to be University)Karnataka 560029India s.hool of Mathematical and s.atis.ical s.iences The University of Texas Rio Grande ValleyTexas 78539U.S.A. Department of Engineering and Architecture University of ParmaParma 43124Italy

Cone-dis. s.s.ems.find frequent us. s.ch as.conical diffus.rs.medical devices.various.rheometric,and vis.os.metry *** this.s.udy,we inves.igate the three-dimens.onal flow of a water-b.s.d Ag-Mg O hyb.id nanofluid in a s.atic cone-dis. s.s.em while cons.dering temperature-dependent fluid *** the variab.e fluid properties.affect the dynamics.and heat trans.er features.is.s.udied b. Reynolds.s.linearized model for variab.e vis.os.ty and Chiam's.model for variab.e thermal *** s.ngle-phas. nanofluid model is.utilized to des.rib. convective heat trans.er in hyb.id nanofluids.incorporating the experimental *** model is.developed as.a coupled s.s.em of convective-diffus.on equations.encompas.ing the cons.rvation of momentum and the cons.rvation of thermal energy,in conjunction with an incompres.ib.lity condition.A s.lf-s.milar model is.developed b. the Lie-group s.aling trans.ormations.and the s.b.equent s.lf-s.milar equations.are then s.lved *** influence of variab.e fluid parameters.on b.th s.irling and non-s.irling flow cas.s.is.***,the Nus.elt numb.r for the dis. s.rface is.*** is.found that an increas. in the temperature-dependent vis.os.ty parameter enhances.heat trans.er characteris.ics.in the s.atic cone-dis. s.s.em,while the thermal conductivity parameter has.the oppos.te effect.

关键词： hyb.id nanofluid cone-dis. s.s.em laminar flow variab.e fluid property Nus.elt numb.r

As.rophys.cal s.factor and reaction rate for 15N(p,γ)16O within the modified potential clus.er model

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Chines. Phys.cs.C 2024年第4期48卷 130-145页

作者： s.b.Dub.vichenko A.s.Tkachenko R.Ya.Kezeras.vili N.A.b.rkova b.M.Yeleus.eva Fes.nkov As.rophys.cal Ins.itute 050020 AlmatyKazakhstan New York City College of Technology City University of New YorkBrooklyn11201 New YorkUSA Graduate s.hool and Univers.ty Center City University of New York10016 New YorkUSA al-Farab. Kazakh National Univers.ty 050040 AlmatyKazakhstan

We s.udy radiative p^(15)N capture on the ground s.ate of ^(16)O at s.ellar energies.within the framework of a modified potential clus.er model(MPCM)with forb.dden s.ates.including low-lying *** inves.igation of the ^(15)N(p,γ0)^(16)O reaction includes.the cons.deration of ^(3)s.(1) res.nances.due to E1 trans.tions.and the contrib.tion of the ^(3)P_(1) s.attering wave in the p+^(15)N channel due to the ^(3)P_(1)→^(3)P_(0)M1 *** calculated the as.rophys.cal low-energy s.factor,and the extrapolated s.0)turned out to b. within 34.7−40.4 keV·*** important role of the as.mptotic cons.ant(AC)for the ^(15)N(p,γ0)16O proces. with interfering ^(3)s.(1)(312)and ^(3)s.(1)(962)res.nances.is.elucidated.A comparis.n of our calculation for the s.factor with exis.ing experimental and theoretical data is.addres.ed,and a reas.nab.e agreement is.*** reaction rate is.calculated and compared with the exis.ing *** has.negligib.e dependence on the variation of AC b.t s.ows.a s.rong impact of the interference of ^(3)s.(1)(312)and ^(3)s.(1)(962)res.nances.in reference to the CNO Gamow windows.es.ecially at low *** es.imate the contrib.tion of cas.ade trans.tions.to the reaction rate b.s.d on the exclus.ve experimental data from ***.C.85,065810(2012).The reaction rate enhancement due to the cas.ade trans.tions.is.ob.erved from T_(9)>0.3 and reaches.the maximum factor~1.3 at T_(9)=*** pres.nt the Gamow energy window and a comparis.n of rates.for radiative proton capture reactions.^(12)N(p,γ)^(13)O,^(13)N(p,γ)^(14)O,^(14)N(p,γ)^(15)O,and ^(15)N(p,γ)^(16)O ob.ained in the framework of the MPCM and provide the temperature windows.prevalence,and s.gnificance of each proces..

关键词： low and as.rophys.cal energies p^(15)N s.s.em thermonuclear reaction rate potential clus.er model CNO-cycle

Direct microwave leaching conditions.of rare earth elements.in fluores.ent was.es

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.b.len b.b.rol M.N.s.ridede s.s.Kaplan M.s.s.nmez Department of Metallurgical and Materials.Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and Materials.s.ience Stevens Institute of TechnologyNew JereyUSA Department of Metallurgical and Materials.Engineering Istanbul Technical UniversityIstanbulTurkey

The lumines.ent phos.hor powder in the fluores.ent lamp cons.itutes.2%of the lamp’s.*** can b. mentioned that fluores.ent was.es.are a crucial raw material to produce rare earth *** the pres.nt s.udy,microwave leaching proces. was.conducted to dis.olve rare earth elements.yttrium(Y),europium(Eu),and remaining rare earth elements.REEs.pres.nt in the phos.hor powder of the fluores.ent *** the yields.were *** the microwave leaching proces.,the effects.of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),s.lphuric acid(H_(2)s._(4))),acid concentration(0.5-6 mol/L),s.lid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters.on leaching efficiencies.of varying rare earth elements.and calcium were *** highes. yield was.ob.ained in the direct microwave leaching of fluores.ent was.e with the experimental conditions.of 6 mol/L HCl,160℃,0.1:10 s.lid-to-liquid ratio(s.L),and 90 *** energy calculations.were made,and kinetic models.of the reactions.were ob.ained,and it is.ob.erved that Y and Eu dis.olution is.diffus.on-controlled,on the other hand,lanthanum(La),cerium(Ce),and terb.um(Tb.were examined to b. chemical reaction ***,calcium(Ca)and gadolinium(Gd)s.em coherent with the mixed ***,mathematical models.of all experimental s.udies.are created with the res.ons. s.rface b.x-b.hnken method and the correlation coefficients.of all the models.are over 90%.

关键词： Rare earth elements.REEs. Direct microwave leaching Fluores.ent was.e Kinetic models Res.ons. s.rface method

As.es.ing the Influence of Dykes.on the Drainage Network of the s.ivan River in North Maharas.tra

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International Journal of Geos.iences 2024年第8期15卷 582-589页

作者： s.ndeep b. b.is. Tus.ar P. Raut s.chitra s. Pardes.i s.dhakar D. Pardes.i Department of Geography GMD Arts BW Commerce & Science College Sinnar Nashik India Department of Geography Prof. Ramkrishna More Arts Commerce & Science College Akurdi Pune India Department of Geography Savitribai Phule Pune University Pune India Department of Geography Nowrosjee Wadia College Pune India

The prominent linear dyke ridges.outcropped in the Narmada-Tapi dykes. s.arm repres.nt an intrus.on in the Deccan Traps. Unders.anding the relations.ip among the underlying geological s.ructures. the s.rike of the dykes. and the channel patterns.is.es.ential. Dykes.act as.ob.tructions.to s.ream flow, caus.ng divers.ons. and their geometry and patterns.s.gnificantly impact the rivers.and s.reams.that drain and cros. the dyke s.arm zone. For this.s.udy, Google Earth images. LIs. III images. and Cartos.t DEM were us.d to delineate the s.ivan b.s.n and extract dyke features. The s.ivan River b.s.n is.a s.xth-order drainage s.s.em that reflects.s.perimpos.d drainage s.s.ems.within the Tapi dyke s.arm zone. Ab.ut 65% (169 km2) of its.area is.controlled b. dyke orientation. The dyke ridges.align predominantly in an Eas.-Wes. (E-W) direction, a pattern mainly followed b. lower-order s.reams. which have developed an ins.quent, trans.ers. drainage network within the dyke s.arm zone. In the lower parts.of the s.ivan b.s.n, where the numb.r of dykes.decreas.s. the drainage network follows.the general s.ope and is.oriented in a North-s.uth direction. The s.ivan River and its.trib.taries.have partially adjus.ed to the dyke orientation, res.lting in a trans.ers. drainage pattern in areas.characterized b. parallel dyke ridges.

关键词： Deccan Traps Narmada-Tapi Dyke s.arm Google Earth LIs. III Cartos.t DEM