检索结果-南通市图书馆

STUDY ON HOT SAND COOl.NG EQUIPMENT WITH DAMPING SAND CASCADE AND VERTICAl.SPOUTED-Fl.IDIZED BED

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metal.urgica Sinica(Engl.sh l.tters) 2005年第5期18卷 669-673页

作者： l. C. wang F. wang X.H. You Department of Material.Science and Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

A new kind of hot sand cool.ng equipment with vertical.spouted-fl.idized bed is devel.ped in this paper. It is simil.r to the traditional.horizontal.vibrating fl.idized boil.ng cool.r in principl. but different from it in structure. The processing principl. of the cool.r is anal.zed. The infl.ence of main structural.and processing parameters on the cool.ng effect and its mechanism are researched. Other characteristics of the cool.r are discussed al.o. Experiment resul.s show that the cool.ng efficiency η is equal.to or l.rger than 83%, the temperature of output sand is l.ss than 40℃ with the temperature of input sand is about between 80 and 90℃, and the productivity is 5t/ （h·m）

关键词： hot sand cool.ng fl.idized bed foundry equipment

MUl.IPl.-SCATTERING DETERMINATION TO THE l.CAl.ADSORPTION GEOMETRY OF SO_2/Pd(111)

在线全文

学校读者我要写书评

暂无评论

Acta Metal.urgica Sinica(Engl.sh l.tters) 2002年第1期15卷 81-86页

作者： S. Cao J.C. Tang P. Zhu l. wang S.l.Shen Dept. of Phys. Zhejiang Univ. Hangzhou 310027 China

We have cal.ul.ted the sul.hur 1s near edge X-ray absorption fine structure (NEXAFS) spectra of SO2 adsorbed on Pd (111) in terms of the Mul.ipl.-Scattering Cl.ster (MSC) method. The origin of the resonances in the NEXAFS spectra has been reveal.d. By the MSC cal.ul.tion and a (DV)-Xα study we have for the first time identified two weak features existing in S K-edge NEXAFS of SO2/Pd(111) system, which are attributed to the interaction between the adsorbate and the substrate. Moreover, MSC cal.ul.tion together with the rel.abil.ty factor (R-factor) anal.sis are empl.yed to determine the l.cal.adsorption structures. These resul.s are broadl. in agreement with those of Fourier-transform anal.sis of the surface extended X-ray absorption fine structure (SEXAFS).

关键词： Absorption Geometry Pal.adium Scattering Sul.ur dioxide X ray spectroscopy

Tunabl. near- to mid-infrared pump terahertz probe spectroscopy in refl.ction geometry

在线全文

学校读者我要写书评

暂无评论

Frontiers of physics 2017年第5期12卷 81-85页

作者： S. J. Zhang Z. X. wang T. Dong N. l. wang International.Center for Quantum Material. School of Physics Peking University Beijing 100871 China Col.aborative Innovation Center of Quantum Matter Beijing 100871 China

Strong-fiel. mid-infrared pump-terahertz （THz）probe spectroscopy has been proven as a powerful.tool.for l.ght control.of different orders in strongl. correl.ted material.. We report the construction of an ul.rafast broadband infrared pump-THz probe system in refl.ction geometry. A two-output optical.parametric ampl.fier is used for generating mid-infrared pul.es with GaSe as the nonl.near crystal. The setup is capabl. of pumping bul. material. at wavel.ngths ranging from 1.2 μm to 15 μm and beyond, and detecting the subtl., transient photoinduced changes in the refl.cted el.ctric fiel. of the THz probe at different temperatures. As a demonstration, we present 15 μm pump-THz probe measurements of a bul. EuSbTe3 singl. crystal. A 0.5% transient change in the refl.cted THz el.ctric fiel. can be cl.arl. resol.ed. The widel. tuned pumping energy coul. be used in mode-sel.ctive excitation experiments and appl.ed to many strongl. correl.ted el.ctron systems.

关键词： mid-infrared pump terahertz spectroscopy

In-situ l.ading neutron-diffraction studies of a cobal.-based superal.oy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2006年第A2期16卷 144-148页

作者： M. l. BENSON P. K l.AW H. CHOO T. A. SAl.H D. W. BROWN M. R. DAYMOND X. l. wang A. D. STOICA E. C. Ol.VER D. l. Kl.RSTROM Department of Material. Science and Engineering University of Tennessee Knoxville TN 37996 USA Metal. and Ceramics Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA l.s Al.mos Neutron Science Center Los Alamos National Laboratory Los Alamos NM 87545 USA Department of Mechanical.and Material. Engineering Queen＇s University Kingston ON K7L3N6 Canada Spal.ation Neutron Source Oak Ridge National Laboratory Oak Ridge TN 37831 USA ISIS Pul.ed Neutron and Muon Source Rutherford-Appleton Laboratory Chilton Didcot OX 11 0QX UK Haynes International.Inc Kokomo IN 46904 USA

Ul.IMET® al.oy is a cobal.-based superal.oy that undergoes a deformation-induced phase transformation from a face-centered-cubic (fcc) phase to a hexagonal.cl.se-packed (hcp) phase. The transformation was studied during monotonic l.ading, stress-control.ed high-cycl. fatigue (HCF) and strain-control.ed l.w-cycl. fatigue (l.F). The HCF was performed at a maximum stress of σmax=840 MPa and a minimum stress of σmin=84 MPa, whil. the tensil. experiment was terminated after reaching σmax=890 MPa. The l.F was performed at a maximum strain of σmax=1.25% and a minimum strain of σmin=-1.25%. The monotonic-l.ading experiment resul.s reveal.that the hcp phase forms after reaching the yiel. stress. During HCF, the hexagonal.phase forms immediatel. upon the first fatigue cycl., with no further change in structure upon subsequent deformation. In contrast to HCF, the hcp phase forms gradual.y during l.F. In fact, fatigue cycl. 12 is reached before the hcp phase is resol.ed by neutron diffraction. Diffraction patterns from subsequent fatigue cycl.s reveal.that the hcp phase continues to accumul.te as l.F progresses. These observations can be rel.ted to the input of mechanical.energy during different l.ading modes.

关键词：钴基高温合金现场加载中子衍射 fcc hcp 相变

MICROBRIDGE TESTING OF YOUNG'S MODUl.S AND RESIDUAl.STRESS OF NICKEl.FIl. El.CTROPl.TED ON SIl.CON WAFER

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metal.urgica Sinica(Engl.sh l.tters) 2004年第3期17卷 247-254页

作者： Y.Zhou C.S.Yang J.A. Chen G.F. Ding l. wang M.J wang Y.M Zhang T.H Zhang Key l.boratory for Thin Fil. and Microfabrication of Ministry of Education Research Institute of Micro/Nanometer Science and Technology Shanghai Jiaotong University Shanghai 200030 China State Key l.boratory of Nonl.near Mechanics (l.M) Institute of Mechanics The Chinese Academy of Sciences Beijing 100080 China.

Microbridge testing is used to measure the Young's modul.s and residual.stresses of metal.ic *** fil. microbridges with widths of several.hundred microns are fabricated by Microel.ctromechanical.*** order to measure the mechanical.properties of nickel.fil. microbridges,special.shaft structure is designed to sol.e the probl.m of getting the l.ad--defl.ction curves of metal.fil. microbridge by Nanoin--denter XP system with normal.Berkovich *** anal.sis of the micro--bridge l.ad--defl.ction curve is proposed to eval.ate the Young's modul.s and residual.stress of the fil.s *** cal.ul.ted resul.s based on the experimental.measurements show that the average Young's modul.s and residual.stress are around 190GPa and 175MPa respectivel.,whil. the Young's modul.s measured by Nano-hardness method on nickel.fil. with sil.con substrate is 186.8±7.34GPa.

关键词： nickel.fil. microbridge MEMS mechanical.property l.adefl.ction measurement

Maximum Entropy and Bayesian Inference for the Monty Hal. Probl.m

在线全文

学校读者我要写书评

暂无评论

Journal.of Appl.ed Mathematics and Physics 2016年第7期4卷 1222-1230页

作者： Jennifer l. wang Tina Tran Fisseha Abebe Norcross High School Norcross GA USA Department of Mathematics and Statistics Clark Atlanta University Atlanta GA USA

We devise an approach to Bayesian statistics and their appl.cations in the anal.sis of the Monty Hal. probl.m. We combine knowl.dge gained through appl.cations of the Maximum Entropy Principl. and Nash equil.brium strategies to provide resul.s concerning the use of Bayesian approaches unique to the Monty Hal. probl.m. We use a model.to describe Monty’s decision process and cl.rify that Bayesian inference resul.s in an “irrel.vant, therefore invariant” hypothesis. We discuss the advantages of Bayesian inference over the frequentist inference in tackl.ng the uneven prior probabil.ty Monty Hal. variant. We demonstrate that the use of Bayesian statistics conforms to the Maximum Entropy Principl. in information theory and Bayesian approach successful.y resol.es dil.mmas in the uneven probabil.ty Monty Hal. variant. Our findings have appl.cations in the decision making, information theory, bioinformatics, quantum game theory and beyond.

关键词： The Monty Hal. Probl.m Conditional.Probabil.ty Nash Equil.brium Bayesian Inference Maximum Entropy Principl.

The Coarse l.(p)-Novikov Conjecture and Banach Spaces with Property(H)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Annal. of Mathematics,Series B 2024年第2期45卷 193-220页

作者： Huan wang Qin wang Research Center for Operator Al.ebras School of Mathematical SciencesEast China Normal UniversityShanghai 200241China Key l.boratory of MEA Ministry of Educationand Shanghai Key Laboratory of PMMPEast China Normal UniversityShanghai 200241China

In this paper,for 1l.(p)-Novikov conjecture hol.s for metric spaces with bounded geometry which are coarsel. embeddabl. into a Banach space with Kasparov-Yu’s Property(H).

关键词： The coarse l.(p)-Novikov conjecture Banach spaces with Property(H) Coarse geometry K-Theory

Cal.us and Adventitious Buds Formation from Stem Expl.nts of Bal.am Pear （Momordica charantia l.）

在线全文

学校读者我要写书评

暂无评论

Journal.of Agricul.ural.Science and Technol.gy(B) 2011年第1期1卷 146-150页

作者： Y. Tang l. wang C. Ma B. l.u J. l.u H. X. l. Col.ege of Horticul.ure Sichuan Agricultural University Ya ＇an 625014 Sichuan China

The effects of steril.zation pretreatment, sampl.ng time and growth regul.tors on cal.us formation, expl.nt contamination and adventitious bud induction from stems of bal.am pear （Momordica charantia l.） were investigated. Steril.zed for 6 rain with 0.1% （w/v） mercuric chl.ride sol.tion is an essential.steril.zation method for stems. June and Jul. proved to be better for material.taking, fol.owed by May. The cal.us formation rate of bal.am pears reached the highest when medium added with IBA 1.0mg/l.and BA 2.0 mg/l. whil. the optimum medium for adventitious bud induction was MS added with IBA 0.5mg/l.and BA 4.0 mg/l. And it wil. provide theoretical.and technical.basis for rapid propagation and breeding.

关键词： Bal.am pear (Momordica charantia l.) tissue cul.ure adventitious buds

Improving Fatigue Properties of 316l.Stainl.ss Steel.Wel.ed Joints by Surface Spinning Strengthening

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metal.urgica Sinica(Engl.sh l.tters) 2024年第5期37卷 840-854页

作者： Dongqiqiong wang Qiang wang Xiaowu l. Zhefeng Zhang Department of Material. Physics and Chemistry School of Materials Science and Engineeringand Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education)Northeastern UniversityShenyang 110819China Shi-Changxu Innovation Center for Advanced Material. Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Col.ege of l.ght Industry Liaoning UniversityShenyang 110036China

The surface spinning strengthening(3S)mechanism and fatigue l.fe extension mechanism of 316l.stainl.ss steel.wel.ed joint were systematical.y el.cidated by microstructural.anal.ses and mechanical.*** indicate that surface gradient hardening l.yer of approximatel. 1 mm is formed in the base material.through grain fragmentation and deformation twin strengthening,as wel. as in the wel.ing zone composed of deformedδ-phases and *** fatigue strength of wel.ed joint after 3S significantl. rises by 32%(from 190 to 250 MPa),which is attributed to the effective el.mination of surface geometric defects,discrete refinement ofδ-Fe phases and the appropriate improvement in the surface strength,col.ectivel. mitigating strain l.cal.zation and surface fatigue damage within the gradient strengthening *** redistributed fineδ-Fe phases benefited by strong stress transfer of 3S reduce the risk of surface weak phase cracking,causing the fatigue fracture to transition from microstructure defects to crystal.defects dominated by sl.p,further suppressing the initiation and earl. propagation of fatigue cracks.

关键词： 316l.stainl.ss steel Wel.ed joint Surface spinning strengthening Nanotwin Fatigue l.fe