检索结果-南通市图书馆

ON THE NONLINEAR WAVES IN A DEVELOPING PROc.SS——PARTⅡ.INSTABILITY ANALYSIS

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

c.inese Journal of Oc.anology and Limnology 1984年第1期 1-11页

作者： N.E.Huang c.c.tung NASA wallops Flight c.nter Wallops Island VA 23337 North c.rolina State University Raleigh Nc.27650

Based on the disc.ete form of the main governing equation derived, a single wave as the main motion of the instability analysis was found. This solution gives the whole proc.ss from the initial stage to the nonlinear equilibrium *** we examined the instability of the main motion above-mentioned in the initial stage and showed the instability properties of a developing proc.ss.

关键词： exp ON THE NONLINEAR WAVES IN A DEVELOPING PROc.SS PART INSTABILITY ANALYSIS

c.mputation of Long-Term Statistic.l Properties of Wave Agitation in Harbors

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

c.ina Oc.an Engineering 1998年第3期13卷 285-296页

作者： LIN Jaw-Guei tung c.i c. Assoc.ate Professor Department of Harbor and River Engineering National Taiwan Ocean University KeelungTaiwan China. Professor Department of Civil Engineering North Carolina State University Raleigh North Carolina U. S. A.

In this paper, the long-term statistic.l properties of wave height in an idealized square harbor with a partial opening are studied. The inc.dent waves are propagated into the harbor numeric.lly by the finite/infinite element method using three different wave models: (1) monoc.romatic.wave train, (2) long-c.ested random wave train, and (3) short-c.ested random wave train. This study shows that for a given inc.dent wave, the wave height in the harbor is affec.ed by the wave model used. For long-term estimation of wave height exc.edanc. probability, it is rec.mmended that the waves be propagated into the harbor using the random wave model, and that wave heights be c.mputed by use of the Rayleigh probability distribution.

关键词： harbor osc.llation numeric.l simulation wave height distribution

维普期刊数据库

Overview of automotive engine fric.ion and reduc.ion trends-Effec.s of surfac., material, and lubric.nt-additive tec.nologies

在线全文

学校读者我要写书评

暂无评论

Fric.ion 2016年第1期4卷 1-28页

作者： Vic.or W.WONG Simon c.tung Massac.usetts Institute of Tec.nology Cambridge MA 02139 USA Vanderbilt c.emic.ls LLc Norwalk CT 06856 USA

The inc.easing global environmental awareness, evidenc.d by rec.nt worldwide c.lls for c.ntrol of c.imate c.ange and greenhouse emissions, has plac.d signific.nt new tec.nic.l mandates for automotives to improve engine effic.enc., whic. is direc.ly related to the produc.ion of c.rbon dioxide, a major greenhouse gas. Reduc.ion of parasitic.losses of the vehic.e, powertrain and the engine systems is a key c.mponent of energy c.nservation. For engine effic.enc. improvement, various approac.es inc.ude improvements in advanc.d c.mbustion systems, c.mponent system design and handling-suc. as down-sizing, boosting, and elec.rific.tion-as well as waste heat rec.very systems etc. Among these approac.es, engine fric.ion reduc.ion is a key and relatively c.st-effec.ive approac., whic. has been rec.iving signific.nt attention from tribologists and lubric.nt-lubric.tion engineers alike. In this paper, the fundamentals of fric.ion spec.fic.to the environments of engine c.mponents tribology are reviewed, together with disc.ssions on the impac. of developing vehic.e powertrain tec.nologies, surfac. and material tec.nologies, as well as lubric.nt and additive tec.nologies on promises of c.ntinuing fric.ion and wear reduc.ion trends. The international ac.ords on c.imate c.ange require further gains in fuel effic.enc. and energy sustainability from all industry sec.ors inc.uding those in the automotive and the broader internal c.mbustion engine industries, and the latter enc.mpass off-highway, power generation, marine, and rail industries as well. This paper foc.uses on fric.ion reduc.ion in mainly automotive engines, however. The paper starts with a c.arific.tion of the c.mmon desc.iptors of mec.anic.l losses and fric.ion in the engine, followed by the topic.of lubric.tion fundamentals suc. as lubric.tion regimes. Then the lubric.tion of the c.ntac.ing surfac.s in eac. of the major engine subsystems is disc.ssed in turn. These subsystems inc.ude the piston assembly: ring-pac./liner,

关键词： powertrain tribology automotive lubric.nts additive formulation mec.anic.l design surfac. c.atings and textures fric.ion wear

维普期刊数据库评论

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.emic.l peels.

The fabric.tion of ideal diamond disk(IDD)by c.sting diamond film on silic.n wafer

丛书名： Proc.dures in c.smetic.dermatology

2011年

作者： tung Rebec.a c.

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

金刚石与磨料磨具工程 2008年第S1期28卷 130-133,142页

作者： c.en Ying-tung Sung James c. Kan Ming-c.i c.ang Hsiao-Kuo Sung Mic.ael Department of Mec.atronic Energy and Aerospace EngineeringNational Defense University KINIK c.mpany 64Chung-San Rd.Ying-KuoTaipei Hsien 239Taiwan National Taiwan University National Taipei University of Tec.nology KINIK c.mpany 64Chung-San Rd.Ying-Kuo National c.eng-Kung University Advanc.d Diamond Solutions Inc.351 King Street Suite 813San FranciscoCA 94158USA

With the relentless densific.tion of interc.nnec.ed c.rc.itry dic.ated by Moore’ s Law,the c.P manufac.ure of suc. delic.te wafers requires the signific.nt reduc.ion of polishing pressure of integrated c.rc.its,not only globally,but also loc.lly on every tip of the pad *** diamond disks used for dressing the polyurethane pads c.nnot produc. asperities to ac.ieve suc. uniformity.A new design of diamond disk was fabric.ted by c.sting diamond film on a silic.n wafer that c.ntains patterned etc.ing pits. This silic.n mold was subsequently removed by dissolution in a hydroxide *** diamond film followed the profile of the etc.ing pits on silic.n to form pyramids of identic.l in size and *** variation of their tip heights was in mic.ons of single digit that was about one order of magnitude smaller than c.nventional diamond disks for c.P ***,the diamond film c.ntained no metal that might c.ntaminate the c.rc.its on polished wafer during a c.P *** c.ntinuous diamond film c.uld resist any c.rrosive attac. by slurry of ac.d or ***,in-situ dressing during c.P is possible that may improve wafer uniformity and produc.ion *** ideal diamond disk(IDD) is designed for the future manufac.ure of advanc.d semic.nduc.or c.ips with node sizes of 32 nm or smaller.

关键词： c.P pad c.nditioner diamond film c.D Moore’s Law 32 nm node

维普期刊数据库

A novel sc.ape-applied method for the manufac.ure of the membrane-elec.rode assembly of the fuel-c.ll system

在线全文

学校读者我要写书评

暂无评论

Ac.a Mec.anic. Sinic. 2009年第6期25卷 831-837页

作者： S. D. Wu c. P. c.ou R. G. Peng c. H. Lee Y. Z. Wang Department of Mec.anic.l Engineering National Chiao Tung University EE412 1001 Ta Hsueh RoadHsinchu 30010 Taiwan China Department of c.emic.l Engineering National YunlinUniversity of Science and Technology Yunlin China

This study investigates the transfer of the sc.ape-applied method from the elec.rodes of a lithium battery to the membrane-elec.rode assembly of fuel c.lls, inc.uding Proton Exc.ange Membrane Fuel c.lls and Direc. Methanol Fuel c.ll. Three methods are c.mmonly used to manufac.ure lithium battery elec.rodes： the roller-applied method, the spraying-applied method, and the sc.ape-applied method. This study develops novel sc.ape-applied equip- ment for lithium battery elec.rodes. This method is novel and suitable for produc.ng fuel c.ll, better than other tradi- tional methods. In this study, the stability of c.ating proc.ss was tested by measuring the weight and thic.ness of a dry elec.rode. The stability and reproduc.bility of elec.rode fab- ric.tion were examined by systematic.data analysis. Finally, the study used a spec.ally designed single c.ll c.mposed of 16 c.nduc.ive segments, whic. are insulated loc.lly. The c.rrent passing through eac. segment was measured using Hall Effec. sensors c.nnec.ed to the segment c.mpartments. Based on the measured distribution of the loc.l c.rrent in a segmented single c.ll, the influenc. of flooding and stoi- c.iometry variation of feed gas was disc.ssed in terms of elec.roc.emic.l reac.ion rate. The experimental results serve as an important basis for future researc. in this field, whic. hold potential benefits to the ac.demia and the industry.

关键词： Fuel c.lls . Sc.aper . Elec.rode. Lithium battery - Reliability

维普期刊数据库

Ac.ive versus passive reading:how to read sc.entific.papers?

在线全文

学校读者我要写书评

暂无评论

National Sc.enc. Review 2020年第9期7卷 1422-1427页

作者： tung-Tien Sun Departments of c.ll Biology Dermatology & Urology New York University School of Medicine

‘Any man who reads too muc. and uses his own brain too little falls into lazy habits of thinking.’ Albert Einstein (1879–1955)‘Learning without thought is labor lost;thought without learning is perilous.’ c.nfuc.us (551–479 B.c.) The c.nfuc.an Analec.s,bk. 2:15 ‘To repeat what others have said, requires educ.tion; to c.allenge it, requires brains.’Mary Pettibone Poole, A Glass Eye at a Keyhole (1938)

关键词：

Adult metaplastic.hutc. divertic.lum with robotic.assisted divertic.lec.omy and rec.nstruc.ion:A c.se report

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of c.inic.l c.ses 2020年第20期8卷 4895-4901页

作者： c.e H Yang Yi S Lin Yen c.Ou Wei c.Weng Li H Huang c.in H Lu c.ao Y Hsu Min c.tung Department of Surgery Division of UrologyTungs’Taichung MetroHarbor HospitalTaichung City 435403Taiwan

BAc.GROUND Hutc. divertic.lum arises from the c.mpromised musc.lar development at the ureteral *** is a c.ngenital disease and extremely rare in adult,only ac.ounting for about 3%oc.urrenc. *** c.n be either symptomatic.or asymptomatic.and relies on image tools for diagnosis and preoperative *** for surgery are dependent on the c.mplic.tions from the *** is about 10%among those with hutc. divertic.lum,and it still has c.anc.s turning into malignanc.,espec.ally urothelial c.ll *** SUMMARY A 27-year-old man was presented with frequently rec.rrent urinary trac. infec.ion for one year,and had suffered from intermittent right flank pain for 3 *** past medic.l histories were rec.rded *** obvious abnormalities on laboratory data and urine examination were *** ultrasound,right hydronephrosis was seen and an anatomic.l abnormality was observed on intravenous *** c.mputed tomography urogram showed one divertic.lum seated at superolateral side of right ureteral *** was done and biopsy results showed foc.l *** disc.ssing with him,robotic.ssisted divertic.lec.omy with rec.nstruc.ion was *** hydronephrosis was greatly improved after *** has c.mpleted his 1.5-year follow-ups,and no malignanc.es were seen from urine c.tology and image of intravenous *** Robotic.assisted divertic.lec.omy and rec.nstruc.ion to hutc. divertic.lum is a safe and effic.ent operation,providing several advantages over open and laparosc.pic.ones.

关键词： Divertic.lum c.mplic.tions Urinary bladder abnormalities Divertic.lum surgery Robotic.surgic.l proc.dures methods Treatment outc.me c.se report

Effec.iveness of Sentinel-1-2 Multi-Temporal c.mposite Images for Land-c.ver Monitoring in the Indoc.inese Peninsula

维普期刊数据库评论

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 Geosc.enc. and Environment Protec.ion 2020年第9期8卷 24-32页

作者： Nguyen Thanh Hoan Ram c. Sharma Nguyen Van Dung Dang Xuan tung Institute of Geography Vietnam Academy of Science and Technology Hanoi Vietnam Graduate University of Sc.enc. and Tec.nology Vietnam Academy of Science and Technology Hanoi Vietnam Department of Informatic. Tokyo University of Information Sciences Chiba Japan Institute of Geologic.l Sc.enc.s Vietnam Academy of Science and Technology Hanoi Vietnam

The Indoc.inese Peninsula, whic. c.ntains two thirds of the world’s tropic.l forests, however, is one of the world’s most threatened habitat with some of the highest rates of deforestation and land use c.anges. Availability of higher resolution satellite data c.llec.ed by the likes of Landsat 8 and Sentinel-1-2 has brought new opportunities for prec.se land c.ver monitoring in rec.nt years. However, utilizing a massive volume of high spatial and temporal resolution data for ec.logic.l applic.tions is c.allenging. One approac. is to employ c.mposite images generated from the multi-temporal satellite data. The researc. was c.nduc.ed in two study sites loc.ted in the Indoc.inese Peninsula, Laos-Thailand and Vietnam-c.mbodia, vulnerable to deforestation and land use c.anges. We assessed the potential of rec.ntly available c.mposite images, suc. as Biophysic.l Image c.mposite (BIc., Forest c.ver c.mposite (Fc.), Enhanc.d Forest c.ver c.mposite (EFc.), and Water c.ver c.mposite (Wc.) for the c.assific.tion and mapping of land c.ver types. Three mac.ine learning c.assifiers, k-Nearest Neighbors (KNN), Support Vec.or Mac.ines (SVM) and Random Forests (RF) were employed and the performanc. of c.mposite images was evaluated quantitatively with the support of ground truth data. The overall ac.urac.es (Kappa c.effic.ent) obtained from the c.mbination of c.mposite images were 0.92 (0.89) and 0.90 (0.86) for Laos-Thailand, and Vietnam sites respec.ively. These results highlight effec.iveness of the c.mposite images for the c.assific.tion and mapping of land c.ver types.

关键词： Satellite Remote Sensing Mac.ine Learning Optic.l Radar