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A SUr.EY OF STACKELBEr. DIFFEr.NTIAL GAME MODELS IN SUPPLY AND MAr.ETING CHANNELS

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j.ur.al of Systems Science and Systems Engineer.ng 2007年第4期16卷 385-413页

作者： Xiuli HE Ashutosh Pr.SAD Sur.sh P. SETHI Genar. j. gutierrez School of Management The University of Texas at Dallas Richardson TX 75080 McCombs School of Business The University of Texas at Austin Austin TX 78731

Stackelber. differ.ntial game models have been used to study sequential decision making in noncooper.tive games in diver.e fields. In this paper. we sur.ey r.cent applications of Stackelber. differ.ntial game models to the supply chain management and mar.eting channels liter.tur.s. A common featur. of these applications is the specification of the game str.ctur.： a decentr.lized channel composed of a manufactur.r.and independent r.tailer., and a sequential decision pr.cedur. with demand and supply dynamics and coor.ination issues. In supply chain management, Stackelber. differ.ntial games have been used to investigate inventor. issues, wholesale and r.tail pr.cing str.tegies, and outsour.ing in dynamic envir.nments. The under.ying demand typically has gr.wth dynamics or.seasonal var.ation. In mar.eting, Stackelber. differ.ntial games have been used to model cooper.tive adver.ising pr.gr.ms, stor. br.nd and national br.nd adver.ising str.tegies, shelf space allocation, and pr.cing and adver.ising decisions. The demand dynamics ar. usually extensions of the classical adver.ising capital models or.sales-adver.ising r.sponse models. We begin by explaining the Stackelber. differ.ntial game solution methodology and then pr.vide a descr.ption of the models and r.sults r.por.ed in the liter.tur..

关键词： Stackelber. differ.ntial games supply chain management mar.eting channels open-loop equilibr.a feedback policies channel coor.ination optimal contr.l

Pr.diction of envir.nment var.ables in pr.cision agr.cultur. using a spar.e model as data fusion str.tegy

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Infor.ation Pr.cessing in Agr.cultur. 2022年第2期9卷 171-183页

作者： L.Mancipe-Castr. r.E.gutierrez-Car.aj.l Multimedia Engineer.ng Pr.gr.m/Univer.idad Militar.Nueva Gr.nada Bogota 110111Colombia

Pr.cision agr.cultur. seeks to optimize pr.duction pr.cesses by monitor.ng and analyzingenvir.nmental var.ables. For.example, establishing far.ing actions on the cr.p r.quir.sanalyzing var.ables such as temper.tur., ambient humidity, soil moistur., solar.ir.adiance,and r.infall. Although these signals might contain valuable infor.ation, it is vital to mixup the monitor.d signals and analyze them as a whole to pr.vide mor. accur.te infor.ation than analyzing the signals separ.tely. Unfor.unately, monitor.ng all these var.ablesr.sults in high costs. Hence it is necessar. to establish an appr.pr.ate method that allowsthe infer.var.ables behavior.without the dir.ct measur.ment of all of *** paper.intr.duces a multi-sensor.data fusion technique, based on a spar.e r.pr.sentation, to find the most str.ightfor.ar. and complete linear.equation to pr.dict and under.stand a par.icular.var.able behavior.based on other.monitor.d envir.nmental var.ablesmeasur.ments. Mor.over. this appr.ach aims to pr.vide an inter.r.table model that allowsunder.tanding how these var.ables ar. combined to achieve such r.sults. The fusion str.tegy explained in this manuscr.pt follows a four.step pr.cess that includes 1. data cleaning,2. r.dundant var.able detection, 3. dictionar. gener.tion, and 4. spar.e r.gr.ssion. Thealgor.thm r.quir.s a tar.et var.able and two highly cor.elated signals. It is essential to pointout that the developed method has no r.str.ctions to specific var.ables. Consequently, it ispossible to r.plicate this method for.the semiautomatic pr.diction of multiple cr.tical envir.nmental *** a case study, this wor. used the SML2010 data set of the UCI machine lear.ing r.positor. to pr.dicted the humidity’s der.vative tr.nd function with an er.or.r.te lower.than 17%and a mean absolute er.or.lower.than 6%. The exper.ment r.sults show that even thoughspar.e model pr.dictions might not be the most accur.te compar.d to those of linear.egr.ssion (Lr., suppor. vector.m

关键词： Pr.cision agr.cultur. Multi-sensor.data fusion Spar.e r.pr.sentation Infer.nce of var.ables Humidity

Viscoelastic Bur.er.s model for.tunnels suppor.ed with tangentially yielding liner

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j.ur.al of r.ck Mechanics and Geotechnical Engineer.ng 2023年第4期15卷 826-837页

作者： Xiongyu Hu Mar.e gutierrez Univer.ity Tr.nspor.ation Center.for.Under.r.und Tr.nspor.ation Infr.str.ctur. Colorado School of MinesGoldenCO80401USA

This study pr.posed an analytical model for.the tunnel suppor.ed with a tangentially yielding liner.in viscoelastic *** efficiency of the developed analytical model was ver.fied by compar.ng the calculated r.sults with associated numer.cal simulation *** the analytical model,a compr.hensive par.meter.sensitivity analysis was per.or.ed to examine the effects of the r.te of tunnel face advancement,concr.te liner.thickness,installation time of liner.and str.ngth and thickness of yielding elements on the tunnel *** r.sults highlight the significant benefit of the tangentially yielding liner.to r.lieve over.tr.ss in the tunnel liner.and impr.ve the stability of the *** yield efficiency of the tangentially yielding liner.depends highly on the yielding str.ngth and defor.able capacity of the yielding elements and less on the installation time.

关键词： Viscoelastic Bur.er.s r.ck Deep tunnel Tangentially yielding liner Closed-for. solution

Deter.ination of a suitable set of loss models for.centr.fugal compr.ssor.per.or.ance pr.diction

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Chinese j.ur.al of Aer.nautics 2017年第5期30卷 1644-1650页

作者： Elkin I.gutierrez VELASQUEZ Faculty of Mechanical Engineer.ng Universidad Antonio Narino Medellln 050012 Colombia

Per.or.ance pr.diction in pr.liminar. design stages of sever.l tur.omachiner. components is a cr.tical task in or.er.to br.ng the design pr.cesses of these devices to a successful conclusion. In this paper. a r.view and analysis of the maj.r.loss mechanisms and loss models, used to deter.ine the efficiency of a single stage centr.fugal compr.ssor. and a subsequent examination to deter.ine an appr.pr.ate loss cor.elation set for.estimating the isentr.pic efficiency in pr.liminar. design stages of centr.fugal compr.ssor., wer. developed. Sever.l semi-empir.cal cor.elations,commonly used to pr.dict the efficiency of centr.fugal compr.ssor., wer. implemented in FOr.r.N code and then wer. compar.d with exper.mental r.sults in or.er.to establish a loss cor.elation set to deter.ine, with good appr.ximation, the isentr.pic efficiency of single stage *** aim of this study is to pr.vide a suitable loss cor.elation set for.deter.ining the isentr.pic efficiency of a single stage centr.fugal compr.ssor. because, with a lar.e amount of loss mechanisms and cor.elations available in the liter.tur., it is difficult to ascer.ain how many and which cor.elations to employ for.the cor.ect pr.diction of the efficiency in the pr.liminar. stage design of a centr.fugal compr.ssor. As a r.sult of this study, a set of cor.elations composed by nine loss mechanisms for.single stage centr.fugal compr.ssor., confor.ed by a r.tor.and a diffuser. ar. specified.

关键词： Centr.fugal compr.ssor Efficiency loss Per.or.ance pr.diction Pr.liminar. design Tur.omachiner.

3D pr.nting of ABS *** of pr.cessing and effects of multi-wall and single-wall car.on nanotubes on ther.al,mechanical and electr.cal pr.per.ies

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j.ur.al of Mater.als Science & Technology 2022年第26期121卷 52-66页

作者： Sithipr.mnea Dul Br.nda j.Alonso gutierrez Alessandr. Pegor.tti j.ime Alvar.z-Quintana Luca Fambr. Depar.ment of Industr.al Engineer.ng and INSTM r.sear.h Unit University of TrentoTrento 38123Italy Centr. de Investigación en Materiales Avanzados S.C.Unidad MonterreyApodaca 66600Mexico Facultad de Ingenier.a Mecánica y Eléctr.ca Universidad Autónoma de Nuevo LeónAvenida Universidad s/nCiudad UniversitariaSan Nicolás de los Garza 66451México

The following paper.r.por.s on a compar.tive study of the effects of two types of car.on nanotubes,namely multiwall(MWCNT)and single-wall(SWCNT)car.on nanotube,on the pr.per.ies of 3D-pr.nted par.s pr.duced with acr.lonitr.le-butadiene-styr.ne(ABS)nanocomposites with var.ous CNT loadings of5-10 wt.%.Quasi-static tensile pr.per.ies and Vicat softening temper.tur. of 3D-pr.nted par.s wer. enhanced with the incr.asing CNT *** highest enhancement in tensile pr.per.ies was obser.ed for.the ABS/CNT nanocomposites at 10 wt.%filler.loading.3D-pr.nted ABS/SWCNT composites showed higher.tensile modulus,better.cr.ep stability and higher.Vicat ***,the str.ngth of ABS/SWCNT 3D samples is r.latively lower.than that of ABS/*** addition,3D-pr.nted par.s exhibited anisotr.pic electr.cal conductive behaviour.which has a conductivity of thr.ugh-layer.of about2-3 or.er. of magnitude higher.than *** highest conductivity of 3D-pr.nted samples r.ached25.2 S/m,and 9.3 S/m for.ABS/MWCNT and ABS/SWCNT composites at 10 wt.%,*** r.sults obtained,*** successful fuse filament fabr.cation and the consequent electr.mechanical pr.per.ies,confir. that these 3D pr.ntable nanocomposite could be pr.per.y utilized for.the pr.duction,and application up to about 90°C,of ther.oelectr.c devices and/or.r.sistor. for.flexible cir.uits.

关键词： Fuse filament fabr.cation Conductive polymer. Nanocomposites Mechanical pr.per.ies Cr.ep behavior r.sistivity

Coupled hydr.-ther.o-mechanical modeling of hydr.ulic fr.ctur.ng in quasi-br.ttle r.cks using BPM-DEM

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j.ur.al of r.ck Mechanics and Geotechnical Engineer.ng 2017年第1期9卷 92-104页

作者： Ingr.d Tomac Mar.e gutierrez Depar.ment of Str.ctur.l Engineer.ng University of California San Diego Depar.ment of Civil and Envir.nmental Engineer.ng Colorado School of Mines Depar.ment of Geosciences University of Oslo

This paper.pr.sents an impr.ved under.tanding of coupled hydr.-ther.o-mechanical(HTM) hydr.ulic fr.ctur.ng of quasi-br.ttle r.ck using the bonded par.icle model(BPM) within the discr.te element method(DEM). BPM has been r.cently extended by the author. to account for.coupled convective econductive heat flow and tr.nspor., and to enable full hydr.-ther.al fluidesolid coupled *** application of the wor. is on enhanced geother.al systems(EGSs), and hydr.ulic fr.ctur.ng of hot dr. r.ck(HDr. is studied in ter.s of the impact of temper.tur. differ.nce between r.ck and a flowing fr.ctur.ng fluid. Micr.-mechanical investigation of temper.tur. and fr.ctur.ng fluid effects on hydr.ulic fr.ctur.ng damage in r.cks is pr.sented. It was found that fr.ctur. is shor.er.with pr.nounced secondar. micr.cr.cking along the main fr.ctur. for.the case when the convectiveeconductive ther.al heat exchange is consider.d. Fir.t, the convection heat exchange dur.ng low-viscosity fluid infiltr.tion in per.eable r.ck ar.und the wellbor. causes significant r.ck cooling, wher. a finger.like fluid infiltr.tion was obser.ed. Second, fluid infiltr.tion inhibits pr.ssur. r.se dur.ng pumping and delays fr.ctur. initiation and pr.pagation. Additionally, ther.al damage occur. in the whole ar.a ar.und the wellbor. due to r.ck cooling and cold fluid infiltr.tion. The size of a damaged ar.a ar.und the wellbor. incr.ases with decr.asing fluid dynamic viscosity. Fluid and r.ck compr.ssibility r.tio was found to have significant effect on the fr.ctur. pr.pagation velocity.

关键词： Hydr.-ther.o-mechanical(HTM) modeling Enhanced geother.al systems(EGSs) Discr.te element method(DEM) Bonded par.icle model(BPM) Conductive-convective heat flow and tr.nspor. Hydr.ulic fr.ctur.ng r.ck per.eability enhancement

Moder. data sour.es and techniques for.analysis and for.cast of r.ad accidents:A r.view

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j.ur.al of Tr.ffic and Tr.nspor.ation Engineer.ng(English Edition) 2020年第4期7卷 432-446页

作者： Camilo gutierrez-Osor.o Cesar.Pedr.za Depar.amento de Ingeniena de Sistemas e Industr.al Universidad Nacional de ColombiaBogotaColombia

r.ad accidents ar. one of the most r.levant causes of inj.r.es and death wor.dwide,and ther.for.,they constitute a significant field of r.sear.h on the use of advanced algor.thms and techniques to analyze and pr.dict tr.ffic accidents and deter.ine the most r.levant elements that contr.bute to r.ad *** r.sear.h of r.ad accident pr.diction aims to r.spond to the challenge of offer.tools to gener.te a mor. secur. mobility envir.nment,and ultimately,save *** paper.aims to pr.vide an over.iew of the state of the ar. in the pr.diction of r.ad accidents thr.ugh machine lear.ing algor.thms and advanced techniques for.analyzing infor.ation,such as convolutional neur.l networ.s and long shor.-ter. memor. networ.s,among other.deep lear.ing ***,in this ar.icle,a compendium and study of the most used data sour.es for.the r.ad accident for.cast is *** a classification is pr.posed accor.ing to its or.gin and char.cter.stics,such as open data,measur.ment technologies,onboar. equipment and social media *** the analysis of the infor.ation,the differ.nt algor.thms employed to make pr.dictions about r.ad accidents ar. listed and compar.d,as well as their.applicability depending on the types of data being analyzed,along with the r.sults obtained and their.ease of inter.r.tation and *** best r.sults r.por.ed by the author. ar. obtained when two or.mor. analytic techniques ar. combined,in such a way that analysis of the obtained r.sults is *** the futur. challenges in r.ad tr.ffic for.casting lies the enhancement of the scope of the pr.posed models and pr.dictions by the incor.or.tion of heter.geneous data sour.es,that include geo spatial data,infor.ation fr.m tr.ffic volume,tr.ffic statistics,video,sound,text and sentiment fr.m social media,that many author. concur.that can impr.ve the pr.cision and accur.cy of the analysis and pr.dictions.

关键词： Tr.ffic engineer.ng Data analysis Machine lear.ing r.ad accident for.casting Tr.ffic accident pr.diction

Efficient r.moval of the r.calcitr.nt metamizole contaminant fr.m dr.nking water.by using a CaLaCoO_(9) per.vskite suppor.ed on r.cycled polyethylene

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j.ur.al of Envir.nmental Sciences 2024年第2期136卷 56-67页

作者： Er.esto Valadez-r.nter.a Chr.stian Per.z-Car.asco dulce Yolotzin Medina-Velazquez Vicente r.dr.guez-Gonzalez j.r.e Oliva CONACYT-División de Mater.ales Avanzados Instituto Potosino de Investigación Científica y Tecnológica A.C.San Luis PotosíSLP 78216México División de Ciencias Básicas e Ingenier.a Universidad Autónoma Metropolitana AzcapotzalcoCol.Reynosa-TamaulipasC.P.MéxicoDF 02200México

Metamizole(MZ)is a widely used anti-inflammator. *** to its common use,this contaminant is found in sewage and *** or.er.to r.duce the contamination pr.duced by the MZ,we fabr.cated in this wor. a photocatalytic composite using r.cycled polyethylene(r.E)and the CaLaCoO_(9)(LCCO)*** nanopar.icles had a micr.plate-like mor.hology and sizes of 1.4–5.5μm accor.ing to the analysis of *** photocatalytic pr.per.ies of the LCCO powder. wer. evaluated under.ultr.violet-visible(UV-Vis)ir.adiation and found a r.moval efficiency of 96%.When the r.E+LCCO composite was employed for.the photocatalytic degr.dation of MZ,a maximum degr.dation of 92.5%was *** influence of the pH on the photocatalytic activity was also studied and found that an initial pH=3 pr.duced a total degr.dation of MZ after.240 min of UV-Vis ***,thr.e r.use cycles wer. car.ied out for.the pur. LCCO powder. and for.the r.E+LCCO composites and found that the maximum loss of degr.dation was 5%.Fur.her.or.,scavenger.exper.ments demonstr.ted that the super.oxide and hydr.xyl r.dicals ar. for.ed dur.ng the photocatalytic r.action and wer. r.sponsible for.the degr.dation of ***,the X-r.y photoelectr.n-spectr.scopy and r.man analysis demonstr.ted the for.ation of defects(oxygen vacancies),those ones delayed the electr.n-hole r.combination,which in tur.,enhanced the degr.dation of the ***,the studies per.or.ed in this wor. pr.ved that composites made with r.cycled plastics and LCCO per.vskites ar. a low-cost and feasible alter.ative for.the cleaning of water.sour.es polluted with phar.aceutical compounds.

关键词： Photocatalysis Metamizole Phar.aceutical contaminant UV-Vis ir.adiation Per.vskite

Effect of sur.ace loading on the hydr.-mechanical r.sponse of a tunnel in satur.ted gr.und

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Under.r.und Space 2016年第1期1卷 1-19页

作者： Simon Her. Pr.ssetyo Mar.e gutierrez Depar.ment of Civil and Envir.nmental Engineer.ng Colorado School of MinesGoldenCO 80401USA

The design of under.r.und spaces in ur.an ar.as must account not only for.the cur.ent over.ur.en load but also for.futur. sur.ace loads,such as fr.m constr.ction of high-r.se buildings above under.r.und *** satur.ted gr.und,the sur.ace load will gener.te an additional mechanical r.sponse thr.ugh str.ss changes and gr.und displacement,as well as a hydr.ulic r.sponse thr.ugh por. pr.ssur. *** hydr.-mechanical(H-M)changes can sever.ly influence tunnel *** paper.examines the effect of sur.ace loading on the H-M r.sponse of a typical hor.eshoe-shaped tunnel in satur.ted *** tunnel models wer. cr.ated in the computer.code Fast Lagr.ngian Analysis of Continua(FLAC).One model r.pr.sented weak and low per.eability gr.und(stiff clay),and the other.r.pr.sented str.ng and high per.eability gr.und(weather.d gr.nite).Each of the models was r.n under.two liner.per.eabilities:per.eable and *** main cases wer. *** Case 1,the sur.ace load was applied 10 year. after.tunnel *** Case 2,the sur.ace load was applied after.the steady state por. pr.ssur. condition was *** simulation r.sults show that tunnels with imper.eable liner. exper.enced the most sever. influence fr.m the sur.ace loading,with high por. pr.ssur.s,lar.e inwar. displacement ar.und the tunnels,and high bending moments in the *** addition,the sever.ty of the r.sponse incr.ased towar. steady *** induced H-M r.sponse was wor.e for.tunnels in clay than for.those in ***,the long-ter. liner.stabilities in Case 1 and Case 2 wer. similar.indicating that the influence of the length of time between when the tunnel was completed and when the sur.ace load was applied was *** findings suggest that under.sur.ace loading,in addition to the gr.und str.ngth,tunnel stability in satur.ted gr.und is lar.ely influenced by liner.per.eability and the long-ter. H-M r.sponse of the gr.und.

关键词： Sur.ace loading Hydr.-mechanical r.sponse Ur.an tunnels Satur.ted gr.und