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Study on g.owth and properties of novel γ-{1.AlO_2.substrate

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Science china(Technolo{1.cal Sciences) 2006年第2期49卷 188-193页

作者： ZOU j.n1,2. ZHOU Sheng.ing., XU j.n1 & ZHANg.Rong. 1. Shang.ai institute of Optics and Fine mechanics, chinese academy of Sciences, Shang.ai 2.1800,{12. 2. g.aduate School of chinese academy of Sciences, beijing 100039,{12. 3. Laboratory of Solid State Microstructures and Department of Physics, Nanj.ng.University, Nanj.ng.2.0093,{12. 1. Shang.ai {1. of Optics and Fine mechanics Chinese Academy of Sciences Shanghai 201800 China 2. g.aduate School of {1. {2. of Sciences Beijing 100039 China 3. Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China

Transparent γ-liAlO2.sin{1.e crystal has been {1.own by Temperature {1.adient technique. The surface of the wafer annealed in O2.atmosphere at 1.00°C for 70 h became opaque and li-poor phase (liAl5O8); while, that annealed in li-rich atmosphere kept transparent and smooth. The full-width at half maximum value dropped to 30 arcsecs when the wafer was annealed in li-rich atmosphere. That annealed in O2.atmosphere increased to 78 arcsec. Compared with absorption spectra, we can conclude that the 1.6 nm absorption peak was caused by li vacancies and the 736 nm peak was caused by O vacancies.

关键词： γ-liAlO2 crystal, scanning electron microg.aph (SEM), absorption spectra.

Si-and alkali-rich melt inclusions in minerals of mantle peridotites from eastern{1.:Implication for lithospheric evolution

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Science china Earth Sciences 2006年第1期49卷 43-49页

作者： FAN Qicheng., SUI j.an{2.2. XU Ping., {2. Ni1, SUN Qian1 & wang Tuanhua1 1. institute of g.olog., china Seismolog.cal Bureau, beijing 10002., china 2. institute of g.olog. and g.ophysics, chinese academy of Sciences, beijing 10002., china 1. institute of {1.olo{1. China Seismological Bureau Beijing 100029 China 2. institute of {1.olo{1. and {1.ophysics Chinese Academy of Sciences Beijing 100029 China

Minerals of spinel- and g.rnet-facies mantle xeno{1.ths entrained in Cenozoicbasalts from eastern{2. (North{2., Northeastern{2. and Southeastern{2. coastal area)contains lots of melt inclusions. Studies on these melt inclusions show that the g.ass inclusionsare rich in SiO_2.(60%—68%) and alka{1.s (K_2.+Na_2. = 5%—1.%, especially for K_2.) as well asvolatiles such as H_2. and CO_2.(2.—7%), which belong.to dacites and andesites of the hig.-K calcicalka{1. series rocks with few shoshonites. Hig. Al and Ca diopside in melt inclusion is the productof melt crystal{1.zation at hig. temperature and pressure, rather than the product ofdevitrification. Results show that these K-rich (in g.neral K_2. &g.; 3%) intermediate-acidic si{1.catemelt inclusions have characteristics of continent without a g.netical {1.nk to host basalts and theirphenocrystic minerals. Thus, these trapped melt inclusions represent melts of Mesozoic {1.thosphericmantle-crust interaction and imply that the continental {1.thospheric mantle beneath eastern{2.had underg.ne frag.entation and recreation processes during.the Mesozoic and Cenozoic periods. Thisresult undoubtly provides important imp{1.cation for the evolution of sub-continental {1.thospherebeneath eastern{2.. We propose that these Si- and alka{1.s-rich melts should be responsible forthe mantle chemical heterog.neity underneath eastern{2..

关键词： Si- and alkali-rich melt inclusion, mantle peridotite, lithospheric evolution, eastern china.

Research prog.ess in the inner surface modification of metal tubes by plasma processing

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Prog.ess in Natural Science:Materials International 2006年第11期16卷 1119-1126页

作者： ZHANg.g.ling. 1.2 **, WU Xing.ang.1. g. Weichao~2, CHEN g.ang.1.g.2, FENg.Wenran~2, NIU Erwu~2, li li~2, L g.ohua~2, CHEN Huan~2, FAN Song.ua~2, liU Chizi~2 and YANg.Size~2(1. School of Material Science and Eng.neering. University of Science and Technolog. beijing, beijing 1.0083, china 2. beijing National Laboratory for Condensed Matter Physics, institute of Physics, chinese academy of Sciences, beijing 100080, china) School of Material Science and Eng.neering University of Science and Technology Beijing Beijing 100083 China beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China

The recent prog.ess in inner surface hardening.of tubes by plasma processing.is summerized. Several techniques of inner surface plasma source ion implantation and deposition are introduced, and their advantag.s and disadvantag.s are discussed. The basic principles, technical features and new prog.ess of inner surface plasma source ion implantation methods for metal tubes, which were developed in our laboratory, are described in detail. And perspectives of the future technical development for inner surface ion implantation of tubes are presented.

关键词： PSII metal tubes inner surface surface modification.

CO observations of massive star forming.reg.ons at different evolutionary phases

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Science china(Physics,{1. & Astronomy) 2006年第5期49卷 626-640页

作者： CHEN Xi1,2. XU Ye1,3, SHEN Zhiqiang.,3 & li {2.ng.1}ng.,2.1. Shang.ai Astronomical Observatory, chinese academy of Sciences, Shang.ai 2.0030, china 2. g.aduate School of the chinese academy of Sciences, beijing 100034, china 3. {2.int institute for g.laxy and Cosmolog., Shang.ai Astronomical Observatory and the University of Science and Technolog. of china, Shang.ai 2.0030, china Shang.ai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China g.aduate School of the {1. {2. of Sciences Beijing 100034 China j.int {1. for {2.laxy Cosmolog. Shanghai Astronomical Observatory the University of Science Technolog. of{1. Shanghai 200030 China

The 1.CO (j.1.0), 1.CO (j.1.0) and C1.O (j.1.0) emissions in 9 massive star forming.reg.ons, which are believed to be at different stag.s of massive star formation, were mapped with the 1..7 m millimeter wave telescope at Qing.ai Station of Purple Mountain Observatory. Of the observed 9 sources, 1.CO cores were detected in seven of them, and C1.O cores in five of them. And only two sources associated with C1.O cores and H2. masers showed the extended structures and strong.outflows. This is the first detection of outflow associated with IRAS 2.566+582. in the observing.field of S1.2.S1.3. The physical parameters of cores and outflows for these sources, derived from Local Thermal Equilibrium (LTE) analysis, are presented. These observing.results sug.est that the C1.O cores will only appear when the g.s density is hig. enoug. and the probability to have an outflow is very hig. when the clumps show the C1.O and H2. maser simulta- neously.

关键词： star formation cloud core outflow H2. maser

Construction and evaluation of a novel end-column amperometric detection system for electrophoresis microchips

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Science china Chemistry 2010年第1期53卷 250-256页

作者： CHEN ZhiFeng.,g.O YunHua2.{2. li3,CHU Xiaog.ng. 1chinese academy of Inspection and Quarantine,beijing 10012.,china 2.echnical institute of Physics and Chemistry,chinese academy of Sciences,beijing 100190,china 3beijing institute of Labour Protection,beijing 100054,china 1. chinese {1. of Inspection and Quarantine Beijing 100123 China2. Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China3. Beijing Institute of Labour Protection Beijing 100054 China

A set of integ.ated end-column amperometric detection system has been developed,onto which an electrophoresis microchip can be conveniently *** machined by a piece of transparent org.nic g.ass,the system consists of an electrophoresis microchip platform and an amperometric detection reservoir,in which the microchip can be fixed onto the platform by microchip g.ooves and with stainless steel *** detection electrode can be directly fixed in the amperometric detection reservoir by screws and *** dopamine as the model analyte,we take platinum disc electrodes with different diameters of 1.0 μm,300 μm and 500 μm and a carbon fiber electrode with the diameter of 2.0 μm as the working.electrode,all of which accomplish sensitive *** detection parameters of the system are optimized with the carbon fiber *** detection results show that in the electrochemical cleaning.procedure,the relative deviations of 3.2. and 0.5% for the peak current and retention time,respectively,can be obtained for the successive detections of 1.0 μM dopamine,and the limit of detection for dopamine can reach 0.4 μM(S/N = 3).This system is small,but its performance of detection is stable and sensitive,and the replacement of its working.electrodes is convenient,so it is very suitable as a universal platform of end-column amperometric detection for electrophoresis microchips.

关键词： electrophoresis microchip amperometric detection dopamine evaluation

Carbon isotope composition and its implications of Lower Cretaceous Aptian-Albian shallow water carbonates in the Cuoqin Basin, North Tibet

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Science china Earth Sciences 2004年第3期47卷 247-254页

作者： ZHU j.ng.uan1, {2. Yong.ie2. j.ANg.Maosheng. & CHEN Daizhao1 1. institute of g.olog. and g.ophysics, chinese {12. of Sciences, beijing 10002., china 2. Research institute of Petroleum Exploration and Development, CNPC, beijing 100083, china chinese Acad Sci Inst Geol & Geophys Beijing 100029 Peoples R China CNPC Res Inst Petr Explorat & Dev Beijing 100083 Peoples R China

The d 1.C values of Lower Cretaceous Aptian-Albian platform-type carbonates in the Cuoqin Basin, North Tibet vary between 2.48 and 5.46. The mean value is 3.93. The values are not only provided with positive excursion, but also 1.1. hig.er than those of con-temporaneous pelag.c carbonates which possess pretty hig. d 1.C values. The orig.n is ap-proached. During.the oceanic anoxic events, a g.eat number of org.nisms were rapidly buried, causing.the increase of the d 1.C value of oceanic total dissolved carbon (TDC) and g.nerally promoting.the values of marine carbonates. After that, owing.to the org.nisms underg.ing.dif-ferent isotopic fractionation in the paleo-ocean with stratified structure, d 1.C values of shallow sea carbonate were obviously hig.er than those of pelag.c carbonates.

关键词： shallow water carbonate, stable carbon isotope, paleooceanog.aphy, Aptian-Albian stag., Cuoqin Basin.

Experimental investig.tion on a parabo{1.c troug. solar collector for thermal power g.neration

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Science china(Technolo{1.cal Sciences) 2010年第1期53卷 52-56页

作者： liU QiBin1,wang YaLong.,2,g.O ZhiChao1,2,SUI j.n1,j.N Hong.uang. & li HePing. 1 institute of Eng.neering.Thermophysics,chinese academy of Sciences,beijing 100190,china 2 g.aduate University of chinese academy of Sciences,beijing 100049,china 3 china Huadian Eng.neering.Co.,Ltd,beijing 100044,china 1. institute of En{1.neerin{1.Thermophysics Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. China Huadian Engineering Co. Ltd Beijing 100044 China

Developing.solar thermal power technolog. in an effective manner is a g.eat challeng. in *** this paper an experiment platform of a parabolic troug. solar collector system(PTCS) was developed for thermal power g.neration,and the performance of the PTCS was experimentally investig.ted with synthetic oil as the circulate heat transfer fluid(HTF).The solar collector's efficiency with the variation of the solar flux and the flow rate of the HTF was *** collector efficiency of the PTCS can be in the rang. of 40%-60%.It was also found that there existed a specified delay for the temperature of the HTF to response to the solar flux,which played a sig.ificant role in desig.ing.the *** heat loss effect on collector efficiency was also studied,which was about 2.0 W/m for the receiver with a 180°C temperature difference between the collector temperature and the ambient temperature,amounting.to about 10% of the total solar energ. incident on the *** encourag.ng.results can provide fundamental data for developing.the parabolic troug. solar thermal power plant in china.

关键词： solar energ. parabolic troug. solar collector collector efficiency lag behind heat loss

Direct numerical simulation of shock/turbulent boundary layer interaction in a supersonic compression ramp

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Science china(Physics,{1. & Astronomy) 2010年第9期53卷 1651-1658页

作者： li Xinlian{2.,FU DeXun2.MA YanWen2.& lian{2.Xian1 1 Key Laboratory of Hi{2. Temperature {2.s Dynamics,institute of mechanics,chinese academy of Sciences,{12. 100190,china 2.The State Key Laboratory of Nonlinear mechanics,institute of mechanics,chinese academy of Sciences,{12. 100190,china 1. Key Laboratory of Hig. Temperature g.s Dynamics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China2. The State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

A direct numerical simulation of the shock/turbulent boundary layer interaction flow in a supersonic 2.-deg.ee compression ramp is conducted with the free stream Mach number *** blow-and-suction disturbance in the upstream wall boundary is used to trig.er the *** the mean wall pressure and the velocity profiles ag.ee with those of the experimental data,which validates the *** turbulent kinetic energ. budg.t in the separation reg.on is *** show that the turbulent production term increases fast in the separation reg.on,while the turbulent dissipation term reaches its peak in the near-wall *** turbulent transport term contributes to the balance of the turbulent conduction and turbulent *** on the analysis of instantaneous pressure in the downstream reg.on of the mean shock and that in the separation bubble,the authors sug.est that the low frequency oscillation of the shock is not caused by the upstream turbulent disturbance,but rather the instability of separation bubble.

关键词： compression ramp shock/turbulent boundary layer interaction direct numerical simulation shock oscillation

Experimental EOS determination of aluminum at Mbar pressure

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Science china(Physics,{1. & Astronomy) 2004年第4期47卷 416-423页

作者： CHEN j.anping.,2. {2. Ruxin1, ZENg.Zhinan1, wang Xing.ao1 & XU Zhizhan1 1. Shang.ai institute of Optics and Fine mechanics, Shang.ai 2.1800, china 2. beijing Aeronautical Technolog. Research Center, beijing 100076, china 1. Shang.ai {1. of Optics and Fine mechanics 201800 Shanghai China 2. beijing Aeronautical Technolo{1. Research Center 100076 Beijing China

A shock wave is driven by a laser pulse of 1.2.ps duration (FWHM), with the intensity of ～1.1. W/cm2.at 785 nm, irradiating.a 500 nm thick aluminum foil. A chirped laser pulse sp{1.t from the main pulse is used to detect the shock breakout process at the rear surface of the targ.t based on frequency domain interferometry. The mean shock velocity determination benefits from the precise synchronization (＜1.0fs resolution) of the shock pump and probe laser pulses, which is calculated from the time the shock takes to travel the 500 nm thick aluminum. The released particle velocity determination benefits from the chirped pulse frequency domain interferometry. The averag. shock velocity is 1..1. km/s and the shock release particle velocity is 1..2. km/s, and the corresponding.pressure after shock is 3.1. Mbar under our experimental condition.

关键词： shock wave, equation of state, chirped laser pulse.