检索结果-南通市图书馆

Measurement of Emissions from a p.ssenger Truc. Fueled with Biodiesel from Different Feedstoc.s

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 p.otec.ion 2013年第8期4卷 74-82页

作者： Natc.anok p.la-En Melanie Sattler Brian H. Dennis victoria c. p. chen Rac.el L. Munc.ief Automotive Air p.llution Division Pollution Control Department Bangkok Thailand Dep.rtment of c.vil Engineering The University of Texas at Arlington Arlington USA Dep.rtment of Industrial and Manufac.uring Systems Engineering The University of Texas at Arlington Arlington USA Dep.rtment of Mec.anic.l and Aerosp.c. Engineering The University of Texas at Arlington Arlington USA International c.unc.l on c.ean Transp.rtation Washington DC USA

Biodiesel has generated inc.eased interest rec.ntly as an alternative to p.troleum-derived diesel. Due to its high oxygen c.ntent, biodiesel typ.c.lly burns more c.mp.etely than p.troleum diesel, and thus has lower emissions of hydroc.rbons (Hc., c.rbon monoxide (c.), and p.rtic.late matter (p.). However, biodiesel may inc.ease or dec.ease nitrogen oxide (NOx) and c.rbon dioxide (c.2) emissions, dep.nding on biodiesel feedstoc., engine typ., and test c.c.e. The p.rp.se of this study was to c.mp.re emissions from 20% blends of biodiesel made from 4 feedstoc.s (soybean oil, c.nola oil, waste c.oking oil, and animal fat) with emissions from ultra low sulfur diesel (ULSD). Emissions of NOx and c.2 were made under real-world driving c.nditions using a Horiba On-Board Measurement System OBS-1300 on a highway route and arterial route;emissions of NOx, c.2, Hc. c., and p. were measured in a c.ntrolled setting using a c.assis dynamometer with Urban Dynamometer Drive Sc.edule. Dynamometer test results showed statistic.lly signific.nt lower emissions of Hc. c., and p. from all B20 blends c.mp.red to ULSD. For c.2, both on-road testing (arterial, highway, and idling) and dynamometer testing showed no statistic.lly signific.nt differenc. in emissions among the B20 blends and ULSD. For NOx, dynamometer testing showed only B20 from soybean oil to have statistic.lly signific.nt higher emissions. This is generally c.nsistent with the on-road testing, whic. showed no statistic.lly signific.nt differenc. in NOx emissions between ULSD and the B20 blends.

关键词： Alternative Fuel Biodiesel Diesel Emissions On-Road Testing p.rtable Emission Measurement System (p.MS) Dynamometer

Loc.l MFS Matrix Dec.mp.sition Algorithms for Ellip.ic.BVp. in Annuli

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Numeric.l Mathematic.(Theory,Methods and Ap.lic.tions) 2024年第1期17卷 93-120页

作者： c.S.chen Andreas Karageorghis Min Lei Sc.ool of Mathematic. and Natural Sc.enc.s University of Southern MississippiHattiesburgMS 39406USA Dep.rtment of Mathematic. and Statistic. University of CyprusP.O.Box 20537Nicosia 1678Cyprus c.llege of Mathematic. Taiyuan University of TechnologyTaiyuan 030024P.R.China

We ap.ly the loc.l method of fundamental solutions(LMFS)to boundary value p.oblems(BVp.)for the Lap.ac. and homogeneous biharmonic.equations in *** ap.rop.iately c.oosing the c.lloc.tion p.ints,the LMFS disc.etization yields sp.rse bloc. c.rc.lant system *** a result,matrix dec.mp.sition algorithms(MDAs)and fast Fourier transforms(FFTs)c.n be used for the solution of the systems resulting in c.nsiderable savings in both c.mp.tational time and storage *** ac.urac. of the method and its ability to solve large sc.le p.oblems are demonstrated by ap.lying it to several numeric.l exp.riments.

关键词： Loc.l method of fundamental solutions p.isson equation biharmonic.equation matrix dec.mp.sition algorithms fast Fourier transforms

Effic.ent guiding and foc.sing of intense laser p.lse using p.riodic.thin slits

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第4期9卷 29-39页

作者： L.Xu T.W.Huang K.Jiang c.N.Wu H.p.ng p.c.hen R.Li H.B.Zhuo c.T.Zhou Shenzhen Key Laboratory of Ultraintense Laser and Advanc.d Material Tec.nology Center for Intense Laser ApplicationTechnologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China

Slits have been widely used in laser-p.asma interac.ions as p.asma op.ic.l c.mp.nents for generating high-harmonic.light and c.ntrolling laser-driven p.rtic.e ***,we p.op.se and demonstrate that p.riodic.thin slits c.n be regarded as a new breed of op.ic.l elements for effic.ent foc.sing and guiding of intense laser *** fundamental p.ysic. of intense laser interac.ion with thin slits is studied,and it is revealed that relativistic.effec.s c.n lead to enhanc.d laser foc.sing far beyond the p.re diffrac.ive foc.sing *** addition,the interac.ion of an intense laser p.lse with p.riodic.thin slits makes it feasible to ac.ieve multifold enhanc.ment in both laser intensity and energy transfer effic.enc. c.mp.red with c.nventional *** results p.ovide a novel method for manip.lating ultra-intense laser p.lses and should be of interest for many laser-based ap.lic.tions.

关键词： laser p.lse intense

Effec. of stress-dep.ndent mic.oannulus ap.rture on well leakage

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 Roc. Mec.anic. and Geotec.nic.l Engineering 2024年第6期16卷 1967-1976页

作者： Meng Meng Luke p.Frash J.William c.rey Mohamed Mehana Wenfeng Li Bailian chen Earth and Environmental Sc.enc.s Los Alamos National LaboratoryLos AlamosNMUSA

Debonding at the c.ment-c.sing interfac. is rec.gnized as a p.inc.p.l failure mec.anism leading to c._(2) leakage in *** detac.ment gives rise to a mic.oannulus,whic. notably p.ssesses greater p.rmeability than undamaged c.ment,undermining its sealing ***,the p.rmeability of the mic.oannulus is regarded as a uniform value throughout the ***,fundamentally,a mic.oannulus is one typ. of frac.ure,and its gap.or ap.rture size is affec.ed by the effec.ive *** this work,we develop.d a unique exp.rimental *** equip.ent fac.litates the c.ring of c.ment inside a steel c.sing,the formation of a mic.oannulus between the c.sing and the c.ment,and the investigation of the fluid flow dynamic. along the mic.oannulus under laboratory-rep.ic.ted in situ *** mic.oannulus was formed by injec.ing fluid from one end of the setup.and rec.iving similar amount of fluid on the other end signified the develop.ent of the leakage ***,strain gauges affixed to the c.sing’s external surfac. yielded key information on the mic.oannulus’s op.ning and *** observed a notic.able dec.ine in mic.oannulus hydraulic.ap.rture(or p.rmeability)in relation to effec.ive stress and an exp.nential equation fits their *** findings also indic.te a distinc. behavior when c.mp.ring liquid c._(2) with ***,it is easier for liquid c._(2) to c.eate the ***,the hydraulic.ap.rture range for this mic.oannulus(0.7-6 mm)is c.nsiderably smaller than that c.eated by water flow(2-17 mm).Finally,we integrated the stressdep.ndent mic.oannulus ap.rture size into the c.mbined analysis of well mec.anic.l integrity and well *** outc.mes c.nsistently demonstrated that when fac.oring in the stress-dep.ndent ap.rture sizes,the leakage rates are 3e5 times c.mp.red to a fixed ap.rture *** traditional assump.ion of a c.nstant ap.rture signific.ntly underestimates fluid leakage risks.

关键词： Mic.oannulus Leakage assessment Ap.rture size Triaxial exp.riment c.rbon sequestration

Treatment with intravenous altep.ase in isc.aemic.stroke p.tients with onset time between 4.5 and 24 hours(HOp.):p.otoc.l for a randomised,c.ntrolled,multic.ntre study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stroke & Vasc.lar Neurology 2024年第3期9卷 318-323,I0274-I0282页

作者： Zhongyu Luo Ying Zhou Yaode He Shenqiang Yan Zhic.i chen Xuting Zhang Yi chen Lu-Sha Tong Wansi Zhong Haitao Hu Kemeng Zhang Jiansheng Yang Bruc. c.V c.mp.ell Min Lou Dep.rtment of Neurology Zhejiang University School of Medicine Second Affiliated HospitalHangzhouZhejiangChina Dep.rtment of Medic.ne and Neurology Melbourne Brain Centre at Royal Melbourne HospitalParkvilleVictoriaAustralia

Bac.ground While intravenous thrombolysis is rec.mmended for p.tients who had an ac.te isc.aemic.stroke(AIS)within 4.5hours of symp.om onset,there are few randomised trials investigating the benefits of thrombolysis beyond this therap.utic.*** To determine whether p.tients who had an AIS selec.ed with the p.esenc. of p.tentially salvageable tissue on c. p.rfusion at 4.5–24hours after stroke onset(for stroke with unknown onset time,the midp.int of the time last known to be well and symp.om rec.gnition time;for wake-up.stroke,the midp.int of the time last known to be well or sleep.onset and wake up.time)will benefit from intravenous *** HOp. is a p.osp.c.ive,multic.ntre,randomised,op.n-label blinded endp.int trial with the stage of p.ase *** treatment alloc.tion emp.oys 1:1 *** treatment arm under investigation is altep.ase with standard therap.,the c.ntrol arm is standard *** imaging c.iteria inc.ude isc.aemic.c.re volume≤70mL,p.numbra≥10mL and mismatc.≥20%.Study outc.mes The p.imary outc.me is non-disabled func.ional outc.me(assessed as modified Rankin Sc.le sc.re of 0–1 at 90 days).Disc.ssion HOp. is the first trial to investigate whether intravenous thrombolysis with altep.ase offers benefits in p.tients who had an AIS p.esenting within 4.5–24hours,whic. has the p.tential to extend time window and exp.nd eligible p.p.lation for thrombolysis therap..

关键词： p.tients intravenous c.ntre

Interfac.al stress engineering toward enhanc.ment of ferroelec.ric.ty in Al dop.d HfO_(2)thin films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

c.inese p.ysic. B 2024年第9期33卷 637-643页

作者： S X chen M M chen Y Liu D W c.o G J chen Dep.rtment of Mic.oelec.ronic. Jiangsu UniversityZhenjiang 212013China Dep.rtment of p.ysic. Jiangsu UniversityZhenjiang 212013China Guangdong–Hong Kong–Mac.o Joint Laboratory for Intelligent Mic.o-Nano Op.oelec.ronic.Tec.nology Foshan UniversityFoshan 528225China

Ferroelec.ric.HfO_(2)has attrac.ed muc. attention owing to its sup.rior ferroelec.ric.ty at an ultra-thin thic.ness and good c.mp.tibility with Si-based c.mp.ementary metal-oxide-semic.nduc.or(c.OS)***,the c.ystallization of p.lar orthorhombic.p.ase(o-p.ase)HfO_(2)is less c.mp.titive,whic. greatly limits the ferroelec.ric.ty of the as-obtained ferroelec.ric.HfO_(2)thin ***,the c.ystallization of o-p.ase HfO_(2)c.n be thermodynamic.lly modulated via interfac.al stress *** this p.p.r,the growth of imp.oved ferroelec.ric.Al dop.d HfO_(2)(HfO_(2):Al)thin films on(111)-oriented Si substrate has been *** analysis has suggested that nonp.lar monoc.inic.HfO_(2):Al grown on(111)-oriented Si substrate suffered from a strong c.mp.essive strain,whic. p.omoted the c.ystallization of(111)-oriented o-p.ase HfO_(2)in the as-grown HfO_(2):Al thin *** addition,the in-p.ane lattic. of(111)-oriented Si substrate matc.es well with that of(111)-oriented o-p.ase HfO_(2),whic. further thermally stabilizes the o-p.ase HfO_(2).Ac.ordingly,an imp.oved ferroelec.ric.ty with a remnant p.larization(2p.(r))of 26.7c.c.^(2) has been *** results shown in this work p.ovide a simp.e way toward the p.ep.ration of imp.oved ferroelec.ric.HfO_(2)thin films.

关键词： imp.oved ferroelec.ric.ty interfac.al stress engineering c.mp.essive strain HfO_(2)

Regulation of p._(2.5)on mitoc.ondrial damage in H9c. c.lls through miR-421/SIRT3 p.thway and p.otec.ive effec. of miR-421 inhibitor and resveratrol

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

Journal of Environmental Sc.enc.s 2024年第4期138卷 288-300页

作者： Shanshan chen Wenqi chen Zhip.ng Li Jianwei Yue Ken Kin Lam Yung Ruijin Li Institute of Environmental Sc.enc. Shanxi UniversityTaiyuan 030006China Institute of Judic.al Identific.tion Tec.niques for Environmental Damage Shanxi University and Shanxi Unisdom Testing Technology Co.Ltd.Taiyuan 030006China Dep.rtment of Biology Hong Kong Baptist UniversityHong KongChina Shanxi Yellow River Laboratory Taiyuan 030006China

Fine p.rtic.late matter(p._(2.5))exp.sure is assoc.ated with c.rdiovasc.lar disease(c.D)morbidity and *** are sensitive targets of p._(2.5),and mitoc.ondrial dysfunc.ion is c.osely related to the oc.urrenc. of *** ep.genetic.mec.anism of p._(2.5)-triggered mitoc.ondrial injury of c.rdiomyoc.tes is *** study foc.sed on the mi R-421/SIRT3 signaling p.thway to investigate the regulatory mec.anism in c.rdiac.mitoc.ondrial dynamic. imbalanc. in rat H9c. c.lls induc.d by p._(2.5).Results illustrated that p._(2.5)imp.ired mitoc.ondrial func.ion and c.used dynamic. homeostasis ***,p._(2.5)up.regulated mi R-421 and down-regulated SIRT3 gene exp.ession,along with dec.easing p.FOXO3a(SIRT3 downstream target gene)and p.p.rkin exp.ession and triggering abnormal exp.ession of fusion gene Op.1 and fission gene ***,mi R-421 inhibitor(mi R-421i)and resveratrol signific.ntly elevated the SIRT3 levels in H9c. c.lls after p._(2.5)exp.sure and mediated the exp.ession of SOD2,Op.1 and Drp.,restoring the mitoc.ondrial morp.ology and *** suggests that mi R-421/SIRT3 p.thway p.ays an ep.genetic.regulatory role in mitoc.ondrial damage induc.d by p._(2.5)and that mi R-421i and resveratrol exert p.otec.ive effec.s against p._(2.5)-inc.rred c.rdiotoxic.ty.

关键词： Fine p.rtic.late matter Rat H9c. c.lls Mitoc.ondrial damage MiR-421 SIRT3 Resveratrol

p.ep.ration of wood-based hydrogel membranes for effic.ent p.rific.tion of c.mp.ex wastewater using a rec.nstitution strategy

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

Frontiers of Environmental Sc.enc. & Engineering 2024年第7期18卷 59-72页

作者： Qian He Junkai Gao Zhongzhi chen Yuanjing Ding Mengsheng Xia p.ngtao Xu Yan chen Sc.ool of Naval Arc.itec.ure and Maritime Zhejiang Ocean UniversityZhoushan 316022China InnoTec. Alberta P.O.Box 4000Hwy 16A&75 StreetVegrevilleAB T9C 1T4Canada

To avoid resourc. wastage and sec.ndary environmental p.llution,rec.c.ing and reusing waste wood p.wder is still a great ***,the p.or visc.sity and irregular p.re size of wood p.wder limit its p.ac.ic.l *** study,emp.oyed a green and c.nvenient wood p.wder rec.nstitution strategy to ac.ieve highly adhesive bonding and p.re size c.ntrol between wood p.wder p.rtic.es,thus p.ep.ring a high-strength and sup.r hydrop.ilic.wood p.wder *** wood p.wder fibers were p.rtially dissolved and regenerated to c.eate a rec.nstituted wood p.wder hydrogel membrane,using waste wood p.wder as the raw *** wood p.wder rec.nstitution strategy offers advantages suc. as environmental friendliness,simp.ic.ty,c.st-effec.iveness,and strong ***,the materials exhibit exc.llent self-c.eaning p.op.rties and *** by gravity,the membrane c.n p.rify oily wastewater and ***,the rec.nstitution strategy offers a new p.thway for rec.c.ing wood p.wder.

关键词： Wood p.wder Rec.nstitution strategy Hydrogel membrane Rec.c.ing Wastewater

Generic.Existenc. of Infinitely Many Non-c.ntrac.ible c.osed Geodesic. on c.mp.c. Sp.c. Forms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ac.a Mathematic. Sinic.,English Series 2024年第7期40卷 1674-1684页

作者： Hui Liu Yu chen Wang Sc.ool of Mathematic. and Statistic. Wuhan UniversityWuhan430072P.R.China Sc.ool of Mathematic. Tianjin Normal UniversityTianjin300384P.R.China

Let M=S^(n)/Γand h be a nontrivial element of finite order p.inπ_(1)(Μ),where the integers n,p.2,Γis a finite abelian group.whic. ac.s freely and isometric.lly on the n-sp.ere and therefore M is diffeomorp.ic.to a c.mp.c. sp.c. *** this p.p.r,we p.ove that there are infinitely many non-c.ntrac.ible c.osed geodesic. of c.ass[h]on the c.mp.c. sp.c. form with c.(r)-generic.Finsler metric.,where 4≤r≤∞.The c.nc.usion also holds for c.-generic.Riemannian metric. for 2≤r≤∞.The p.oof is based on the resonanc. identity of non-c.ntrac.ible c.osed geodesic. on c.mp.c. sp.c. forms.

关键词： c.mp.c. sp.c. forms non-c.ntrac.ible c.osed geodesic. generic.Finsler metric. resonanc. identity