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B_c Meson Studies

高能物理与核物理 2002年第Z1期26卷 1-10页

作者： CHANG Chao-Hsi (institute of Theoretical Physics, chinese academy of sciences, Beijing 100080, china) Inst. of Theor. Phys. Chinese Acad. of Sci. Beijing 100080 China

Our studies on the meson Bc arc briefly *** decays of the meson Bc to a P-wave charmonium Xc or hc are reported comparatively precisely because they are fresh

关键词：高能物理核物理增刊张肇西 B_c Meson Studies Rev

PROGRESS OF SMCE CHEMISTRY RESEARCH IN china DURING 1995─1997

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空间科学学报 1998年第S1期18卷 21-26页

作者： WANG Shi-jie OUYANG Zi-yuan (State Key Laboratorp of Environmental geochemistry,institute of geochemistry, The chinese academy of sciences, guiyang 5.0002)

Over the past years chinese space chemists have done much work on space chemistry and related disciplines, especially on the solar nebular evolution,meteorjtes, comparative planetology and the origin and evolution of ... 详细信息

关键词： Progress Space chemistry

Relationship between the formation, evolution of the ancient oil reservoir and metallogenesis

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chinese Science Bulletin 1999年第S2期44卷 158-159页

作者： SHAO Shuxun, ZHANG Qian and PAN Jiayong Open Laboratory of Ore Deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 5.0002, china Open Laboratory of Ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

IN nature, there are many coexisting examples of petroleum with metallic ore deposit. There are metallicore deposits in the border and interior of many petroliferous basins, such as the bedded Pb-Zn ore depositin carbonate rock, gold sulfide ore deposit in black shale, cinnabar deposit, copper sandstone, kupferschiefer ore deposit, etc. (Tang Kuilian, 1995). The liquid hydrocarbon all was found in the Pb-Zn oredeposit, Mercury deposit, Carlin gold deposit (Shi Jixi et al., 1995) as well as the beds adjacentto them. There are a large number of bitumen and organic inclusions with hydrocarbon in the low-temperature Hg-Sb-Au ore concentrated district in southwestern margin to Yangtze platform. Fu Jiamao (1988)thought that they are remains after the ancient oil reservior destructed. In pace with constantly finding thecoexisting phenomena of metallic ore deposit and petroleum as well as further studying the relationship between both of them, it is progressively known that there are close links between oil/gas field and

关键词： ancient oil reservoir Hg Sb Au deposits relationship.

Preliminary investigations of platinum-group elements in the Carlin-type gold deposits, southwestern china

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chinese Science Bulletin 1999年第S2期44卷 152-153页

作者： SU Wenchao, QI Liang and HU Ruizhong Open Laboratory of Ore Deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 5.0002, china Open Laboratory of Ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

As is well known, platinum-group elements (PGEs) has long been mainly obtained as a byproduct fromsome magmatic deposits of Cu-Ni. The common notion that the platinum-group elements are chemically inert and immobile under most geological conditions. However, a hydrothermal origin at low temperature was recognized for some unusual platinum-group elements occurrences in the unconformity-related uranium deposits in Australia. The possibility of hydrothermal transport of platinum-group elements hasrecently received considerable attention This note introduces the preliminary investigations of platinum-group elements in some Carlin-typegold deposits, southwestern china. 1 Geological

关键词： platinum-group elements Carlin-type gold deposits southwestern china.

Tree　ring　analysis　for　determination　of　pollution　history　of　Chengde　City，north　china

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Journal of Environmental sciences 1996年第1期8卷 77-85页

作者： Jiang Gaoming(institute of Botany, chinese academy of sciences,Beijing 100044,china ) Inst Botany Chinese Acad of Sci Beijing China China

Air pollution history of sulphur and heavy metals since 1800 in Chengde City , north china,was studied by analyzing the concentrations of sulphur and heavy metals in growth rings of Pinus tabulaeformis Carr. Sulphur concentrations in the tree rings of 1910-1920, 1970-1980,and 1980-1990 have increased 1-2 , 3-5 and 10 times respectively as those in the tree ring of 1810-1820 (P20-1940, possibly due to the opening of Damiao Iron Mine by the Japanese in 1927; Mn increased throughout the whole history, from 4. 1 μg/g(1840- 1850) to 10. 4 μg/g (1980 1990,P 2.4,1.8,1.5,1.0 and 0. 8 times respectively during the past 190 years or so. The results showed that serious environmental pollution, especially air pollution of SO2,has occurred since 1949 when the People's Republic of china was founded.

关键词： tree rings Pinus tabulaeformis sulphur and heavy metals pollution history Chengde

N DIMENSIONAL FINITE WAVELET FILTERS

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Journal of Computational Mathematics 2003年第5期21卷 595-602页

作者： Si-long Peng (NADEC, institute of Automation, chinese academy of sciences, Beijing 100080, china) NADEC Institute of Automation Chinese Academy of Sciences 北京 100080

In this paper, a large class of n dimensional orthogonal and biorthognal wavelet filters (lowpass and highpass) are presented in explicit expression. We also characterize orthogonal filters with linear phase in this c... 详细信息

关键词： n Dimension Linear phase Wavelet filters.

Formation of Ultrafine Metal Particles and Metal Oxide Precursor on Anodized Al by Electrolysis Deposition

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Journal of Materials Science & Technology 2000年第1期16卷 50-54页

作者： Lingchuan LI (institute of Chemical Metallurgy, chinese academy of sciences, Beijing 100080, china) institute of Chemical Metallurgy Chinese Academy of Sciences Beijing 100080 China

Nickel was deposited by ac electrolysis deposition in the pores of the porous oxide film of Al produced by anodizing in phosphoric acid. Ultrafine rod-shaped Ni particles were formed in the pores. At the same time a film of Ni oxide precursor was developed on the surface of the porous oxide film. The Ni particles and the Ni oxide precursor were examined by SEM, TEM and X-ray diffraction. The thickness of the barrier layer of the porous oxide film was thin and it attributed to the formation of the metal particles, while the formation of the oxide precursor was associated with the surface pits which were developed in the pretreatment of Al.

关键词： Al Formation of Ultrafine Metal Particles and Metal Oxide Precursor on Anodized Al by Electrolysis Deposition

Mobility of elements during lamprophyre alteration and altered fluid characteristics in the Zhenyuan gold deposit

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chinese Science Bulletin 1999年第S2期44卷 254-256页

作者： HUANG Zhilong, LlU Congqiang and XlAO Huayun Open Laboratory of Ore Deposit geochemistry, institute of geochemistry, chinese academy of sciences, guiyang 5.0002, china Open Laboratory of Ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

LAMPROPHYRES are one of the rock types which are easily subject to alteration. Alteration can not onlychange their texture and mineral assemblage, but also influence their geochemistry properties. The mostavailable data show that alteration will directly influence the content of Au in lamprophyre. For example,in the Superior area of Canada and the Yilgan area of Australia relatively fresh lamprophyres are bothlow in Au contents (3.9×10-9 and 1.7×10-9, respectively), but the contents of Au in altered lamprophyres from both areas are double increased (38×10-9 and 20×10-9 on average). Lamprophyres arewidely exposed in the Zhenyuan gold deposit, Yunnan Province and they are closely associated with goldmineralization both in space and in time. So the lamprophyres in the Zhenyuan gold deposit can be citedas the most typical example both at home and abroad. Lamprophyres in the mining district have undergonevarying-degree alteration and partly experienced mineralization. On the basis of the mass equilibrium e-

关键词： element mobility altered fluid lamprophyre Zhenyuan gold deposit.

Some advancements in measurements of physical parameters of earth's material at high temperature and ultrahigh pressure

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chinese Science Bulletin 1997年第21期42卷 1807-1810页

作者： XIE Hongsen, ZHANG Yueming, GUO Jie, XU Ji’an, SONG Maoshuang, XU Yousheng and HOU Wei1. institute of geochemistry, chinese academy of sciences, guiyang 5.0002, china 2, institute of Earth Science, Academia Sinica, Taipei, china institute of geochemistry Chinese Academy of Sciences Guiyang China institute of Earth Science Academia Sinica Taipei China

IT is very important to measure physical parameters of minerals, rocks, melts and fluids athigh pressure and high temperature. The data from these experiments can provide materialsfor explanation of geophysical observations on large scale, and information of geochemicalfield. Therefore, we set up measurement methods on elastic wave velocity, electrical conduc-tivity and differential thermal analysis in YJ-3000 ton press fitted with a wedge-type

关键词： physical parameters earth’s material high temperature and nltrahigh pressure.