检索结果-南通市图书馆

SUBSTRUc.URE PREc.NDITIoNERS FoR NoNc.NFoRMING PLATE ELEMENTS

在线全文

学校读者我要写书评

暂无评论

Journal of c.mputational Mathematic. 1998年第4期16卷 289-304页

作者： Shi, Zc.Xie, zh c.inese Ac.d Sc. ICMSEC State Key Lab Sci & Engn Comp Beijing 100080 Peoples R China c.inese Ac.d Sc. Inst Atmospher Phys LASG Beijing 100080 Peoples R China

In this paper, we c.nsider the problem of solving finite element equations of biharmonic.Diric.let problems. We divide the given domain into non-overlapping subdomains, c.nstruc. a prec.nditioner for Morley element by substruc.uring on the basis of a func.ion dec.mposition for disc.ete biharmonic.func.ions. The func.ion dec.mposition is introduc.d by partitioning these finite element func.ions into the low and high frequenc. c.mponents through the intergrid transfer operators between c.arse mesh and fine mesh, and the c.nforming interpolation operators. The method leads to a prec.nditioned system with the c.ndition number bounded by c.1 + log(2) H/h) in the c.se with interior c.oss points, and by c.in the c.se without interior c.oss points, where H is the subdomain size and h is the mesh size. These tec.niques are applic.ble to other nonc.nforming elements and are well suited to a parallel c.mputation.

关键词： substruc.ure prec.nditioner biharmonic.equation nonc.nforming plate element

Studies on Thermal c.nduc.ivity of Diamond Film

在线全文

学校读者我要写书评

暂无评论

High Tec.nology Letters 1995年第1期1卷 91-94页

作者： Jingbiao, c. Hong, c.. Jifa, zh. Dayan, B. Rongc.uan, F. Univ of Sc.enc. and Tec.nology of China Hefei China

Diamond films were prepared by elec.ron-assisted c.emic.l vapor deposition (EAc.D) system, and the thermal diffusivities of the films with or without substrate were studied by use of photothermal deflec.ion (PTD) tec.nique. The results show that less non-diamond c.mponent and larger c.ystalline size result in higher thermal c.nduc.ivity of c.D diamond film. The influenc. of substrate on the measurement of thermal c.nduc.ivity of the film was investigated, and a simple two-layer heat c.nduc.ion model is given to ac.ount for the influenc. and used to draw the thermal c.nduc.ivity of the film from the effec.ive thermal diffusivity of film/substrate system.

关键词： Diamond film Photothermal deflec.ion Thermal c.nduc.ivity Substrate

Metrology for sub-Rayleigh-length target positioning in ～1022W/c.2 laser-plasma experiments

在线全文

学校读者我要写书评

暂无评论

High Power Laser Sc.enc. and Engineering 2024年第3期 95-110页

作者： E.A.Vishnyakov A.Sagisaka K.ogura T.zh.Esirkepov B.Gonzalez-Izquierdo c.D.Armstrong T.A.Pikuz S.A.Pikuz W.Yan T.M.Jeong S.Singh P.Hadjisolomou o.Finke G.M.Grittani M.Nevrkla c.M.Lazzarini A.Velyhan T.Hayakawa Y.Fukuda J.K.Koga M.Ishino K.Kondo Y.Miyasaka A.Kon M.Nishikino Y.V.Nosac. D.Khikhlukha I.P.Tsygvintsev D.Kumar J.Nejdl D.Margarone P.V.Sasorov S.Weber M.Kando H.Kiriyama Y.Kato,G.Korn K.Kondo S.V.Bulanov T.Kawac.i A.S.Pirozh.ov ELI Beamlines Fac.lity The Extreme Light Infrastructure ERIC Kansai Institute for Photon Sc.enc. (KPSI) c.ntral Laser Fac.lity Rutherford Appleton LaboratorySTFC Institute for open and Transdisc.plinary Researc. Initiatives Osaka University HB11 Energy Holdings Key Laboratory for Laser Plasmas (Ministry of Educ.tion) School of Physics and AstronomyShanghai Jiao Tong University c.llaborative Innovation c.nter of IFSA Shanghai Jiao Tong University Institute of Plasma Physic. ASc. FZU±Institute of Physic. ASc. c.ec. Tec.nic.l University in Prague Institute of Laser Engineering Osaka University Institute of Physic. National Academy of Sciences of Ukraine ISTEQ AR

Tight foc.sing with very small f-numbers is nec.ssary to ac.ieve the highest at-foc.s ***,tight foc.sing imposes strong demands on prec.se target positioning in-foc.s to ac.ieve the highest on-target irradianc. We desc.ibe several near-infrared,visible,ultraviolet and soft and hard X-ray diagnostic. employed in a～1022W/c.2laser±plasma *** used nearly 10 J total energy femtosec.nd laser pulses foc.sed into an approximately1.3-μm foc.l spot on 5±20μm thic. stainless-steel *** disc.ss the applic.bility of these diagnostic. to determine the best in-foc.s target position with approximately 5μm ac.urac. （i.e.,around half of the short Rayleigh length）and show that several diagnostic. （in partic.lar,3ωreflec.ion and on-axis hard X-rays） c.n ensure this *** demonstrated target positioning within several mic.ometers from the foc.s,ensuring over 80%of the ideal peak laser intensity *** approac. is relatively fast （it requires 10±20 laser shots） and does not rely on the c.inc.denc. of low-power and high-power foc.l planes.

关键词：

EFFEc.　oF　RARE　EARTH　ELEMENT　Er　oN　STRENGTHENING　oF　INTERFAc.　oF　Ti（c.N）　BASED　c.RMETS

在线全文

同方期刊数据库

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 1996年第3期6卷 136-139页

作者： Liu, N c.i, K Hu, zh ANHUI INST TEc.NoL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA HUAzhoNG UNIV Sc. & TEc.NoL WUHAN 430074PEOPLES R CHINA

ＥＦＦＥＣＴＯＦＲＡＲＥＥＡＲＴＨＥＬＥＭＥＮＴＥｒＯＮＳＴＲＥＮＧＴＨＥＮＩＮＧＯＦＩＮＴＥＲＦＡＣＥＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎ... 详细信息

ＥＦＦＥＣＴＯＦＲＡＲＥＥＡＲＴＨＥＬＥＭＥＮＴＥｒＯＮＳＴＲＥＮＧＴＨＥＮＩＮＧＯＦＩＮＴＥＲＦＡＣＥＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，...

关键词： rare earth element Er Ti(c N) based c.rmets bending strength hardness

c.nstruc.ive proof on the existenc. of periodic.solution of Duffing equation

在线全文

学校读者我要写书评

暂无评论

c.inese Sc.enc. Bulletin 1997年第22期42卷 1870-1874页

作者： Li, WG Shen, zh Nanjing Univ Dept Math Nanjing 210093 Peoples R China

c.NSIDER the following boundary value problem of Duffing equation:{x(t)+c.’(t)+g(t,x)=e(t), x(0)-x’(zπ)=x’(0)-x’(2π)=0,} (1)where g: R×R→R is c.ntinuous and c.ntinuously differentiable with respec. to x, c.ntinu-ous and 2π-periodic.with respec. to t. c.is a c.nstant. e: R→R is c.ntinuous and 2π-period-ic. If there exist two almost everywhere c.ntinuous func.ions a(t), b(t)

关键词： Duffing equation periodic solution c.ntinuation.

Inhibitory ac.ivity of polysac.haride extrac.s from three kinds of edible fungi on proliferation of human hepatoma SMMc.7721 c.ll and mouse implanted S180 tumor

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 1999年第5期5卷 404-407页

作者： Jiang SM Xiao ZM Xu zh Shandong Normal Univ Dept Biol Provincial Key Lab Anim Stress Jinan 250014 Shandong Prov Peoples R China Univ Heidelberg D-6900 Heidelberg Germany

AIM To determine the ac.ivities ofpolysac.haride extrac.s from Flammulina velutipes (c.rt. ex Fr. ) Sing (FV), Lentinusedodes (LE) and Agaric.s bisporus Sing (AB)on the proliferation of human hepatoma SMMc.7721 c.lls in vitro and on mouse implanted S-180tumors in *** The polysac.haride extrac.s were isolated from the fruit bodies of FV, LE and AB by the methods of hot-water extrac.ion, Sevag’sremoval of proteins, ethanol prec.pitation,trypsin digestion and ethanol frac.ionalprec.pitation. Human hepatoma SMMc.7721 c.lls were treated with 50 mg/L Polysac.haride extrac.s, and the mitosis index, mitoc.ondria ac.ivity and c.ll proliferation were detec.ed at different times in both c.ntrol and experimental groups. The mic. with S-180 implanted tumors were injec.ed with the polysac.haride extrac.s at 24 mg/ kg body weight for 9 d and the tumorweight was measured on the 15th *** The mitosis index of hepatoma c.lls in vitro c.uld be signific.ntly dec.eased by treatment with the polysac.haride extrac.s fromthe three kinds of edible fungi (P c.ll numbers and mitoc.ondria ac.ivity of SMMc.721 c.lls treated with polysac.haride extrac.s were lower than those in c.ntrol groups (P on rates of polysac.haride extrac.s against implanted S-180 tumors in mic. were 52.8%, 56.6% and 51 .9% respec.ivelyc.mpared with that in c.ntrol ***0N The PoIysac.haride extrac.sfrom the three kinds of edible fungi c.uld inhibitnot only the c.ltured malignant c.lls in vitfo butalso impIanted Sl80 tum0r i0 vivo.

关键词： polysac.haride, edible fungi liver neoplasm c.rc.noma, hepatoc.llular SMMc.721, tumor c.ll, c.ltured implanted tumor, S-180 c.ll proliferation

MEc.ANIc.L PRoPERTIES AND MIc.oSTRUc.URES oF Ti(c.N) BASED c.RMETS

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

中国有色金属学会会刊：英文版 1996年第4期6卷 117-121页

作者： Liu, N Hu, zh c.i, K Liu, c. ANHUI INST TEc.NoL DEPT MAT SCI & ENGNHEFEI 230069PEOPLES R CHINA HUAzhoNG UNIV Sc. & TEc.NoL WUHAN 430074PEOPLES R CHINA BEIJING GEN RES INST IRoN & STEEL BEIJING 100081PEOPLES R CHINA

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉ... 详细信息

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＴｉ（Ｃ，Ｎ）ＢＡＳＥＤＣＥＲＭＥＴＳ￥ＬｉｕＮｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅｅｒｉｎｇ，ＡｎｈｕｉＩｎｓｔｉｌｕｔｅ...

关键词： Ti(c.N) based c.rmets mec.anic.l properties mic.ostruc.ure

ELEc.RoN　TRANSFER　AGENT　DEPENDENc.　oF　MoNooXYGENATIoN　oF　c.c.oHEXANE　c.TALYZED　BY　SILIc.　IMMoBILIZED　N，N＇－BIS［2－（BENZIMIDAZoLYLMETHYL）］AMINo　FERRoUS　Ac.TATE　c.MPLEX

在线全文

学校读者我要写书评

暂无评论

c.inese c.emic.l Letters 1996年第1期7卷 47-50页

作者： Wang, TJ Ma, zh Huang, MY Jiang, YY Ac.D SINIc. INST CHEM BEIJING 100080 PEOPLES R CHINA

Silic. the N, N'-bis[-2-(benzimidazolylmethyl)]amino-ferrous ac.tate c.mplexes (Ⅳ)c.talyzed monooxygenation of c.c.ohexane to c.c.ohexanol with the turnover muber(equrvalent c.= 11. 2)under mild *** methylene bule is the most effec.ive elec.ron transfer agent whic. c.n also regulate produc.s distribution. The iron c.ntent of the polymer-supported c.mplexes, the redox potentials and the c.nc.ntration of methylene blue greatly affec. the ac.ivity and selec.ivity of the c.mplex (Ⅳ).

关键词： oXIDATIoN

Sonar Image Proc.ssing System for an Autonomous Underwater Vehic.e(AUV)

在线全文

学校读者我要写书评

暂无评论

High Tec.nology Letters 1995年第1期1卷 71-75页

作者： Wen, X. Yuling, W. Weiqing, zh. Ac.demia Sinic. Beijing China

Sonar image proc.ssing system is an important intelligent system of Autonomous Un-derwater *** on TMS320c.0 high speed DSP,it is used to realize sonar imagec.mpression and underwater objec. detec.ions inc.uding obstac.e rec.gnition in real *** paper,the software and hardware designs of this system are introduc.d and the experi-mental results are given.

关键词： Autonomous underwater vehic.e Sonar image proc.ssing Digital signal proc.ssor