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THE CHEMISTRY AND DISTRIBUTION OF TAXANE DITERPENOIDS AND ALK

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药学学报 1995年第11期 862-880页

作者： JZ Zhang (institute of Materia Medica ,Chiese academy of Medical sciences and Peking Union Medical College, {3. 100050) present address:National Lab of Natural & Biomimetic Drugs, School of Pharmaceutical sciences, {3. Medical Unicersity, B

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关键词： OF TAXANE DITERPENOIDS AND ALK THE CHEMISTRY AND DISTRIBUTION

Analytical method of radiation by a wave energy device with dual rectangular floating bodies

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Acta Oceanologica Sinica 2010年第3期29卷 106-115页

作者： WANG Wensheng YOU Yage ZHANG Yunqiu WU Bijun YE Yin Guangzhou institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China Key Laboratory of Renewable Energy and Gas Hydrate Chinese Academy Sciences Guangzhou 510640 China Graduate University Chinese Academy of Sciences Beijing 100049 China

The system with one floating rectangular body on the free surface and one submerged rectangular body has been applied to a wave energy conversion device in water of finite depth. The radiation problem by this device on a plane incident wave is solved by the use of an eigenfunction expansion method, and a new analytical expression for the radiation velocity potential is obtained. The wave excitation force is calculated via the known incident wave potential and the radiation potential with a theorem of Haskind employed. To verify the correctness of this method, an example is computed respectively through the bound element method and analytical method. Results show that two numerical methods. are in good agreement, which shows that the present method is applicable. In addition, the trends of hydrodynamic coefficients and wave force are analyzed under different conditions by use of the present analytical method.

关键词： wave energy device hydrodynamic coefficients wave force analytical method

The Approximation Theorem of Convolution Operator in △~p Set-valued Function Space

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Acta Mathematicae Applicatae Sinica 2002年第3期18卷 495-500页

作者： Pei-xin Yeinstitute of Mathematics, academy of Mathematics and System sciences, {3. academy of Science, beijing institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Science Beijing 100080 China

The paper is a contribution to the problem of approximating random set with values in a separable Banach space. This class of set-valued function is widely used in many *** investigate the properties of p-bounded integrable random set. Based on this we endow it with △p metric which can be viewed as a integral type hausdorff metric and present some approximation theorem of a class of convolution operators with respect to △p metric. Moreover we also can establish analogous theorem for other integral type operator in △p space.

关键词： Set-valued function random set convolution operator △~p space approximation theorem

Malanite——A New Cupric Platinum (Pt^(3.)) and Iridium (Ir^(3.)) Sulphide

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Acta Geologica Sinica(English Edition) 1997年第2期71卷 152-157,233页

作者： Yu Zuxiang institute of Geology, chinese academy of Geological {3., beijing, 10003. institute of Geology Chinese Academy of Geological Sciences Beijing 100037 [?]Yu Zhuxiang Born in Nov. 193. graduated from the Specialty of Petrology and Mineralogy of the Department of Geology Beijing College of Geology in 1953. He has long engaged in the study of mineralogy as Research Professor at the Institute of Geology Chinese Academy of Geological Sciences.

Malanite was first found in veinlets of disseminated copper-nickel ores inZunhua County, Hebei Province, and then in platinum-bearing chromite ores in ShuangfengVillage, Yanshan. In the former case, malanite appears as octahedrons or dodecahedrons asso-ciated with pyrrhotite, pentlandite, sperrylite and cooperite; while in the latter case, it is massiveor present in anhedral glomerocrysts, filling in cracks of iridisite and associated with osmiride,ferrian platinum and iridisite. Malanite is steel-grey in colour, opaque with metallic lustre andblack streaks and brittle with no magnetism. H_M=5.0, VHN_(20)=417kg/mm^2, cleavage {111}sometimes observed. The calculated density is 7.57g/cm^3. The reflective colour is white with alight green tint. Internal reflections are not observed. This mineral is isotropic, showing nobireflection or reflection pleochroism in air. By means of electron microprobe analysis, the em-pirical formula (based on 7 atoms) is expressed as (Cu_(0.93.Fe_(0.06))_(∑0.99)(Pt_(1.03.Ir_(0.66)Rh_(0.04)Pd_(0.03.Co_(0.20)Ni_(0.03.)_(1.99)S_(4.03. or (Cu_(0.95)Fe_(0.07))_(∑1.02)(Pt_(1.3.)Ir_(0.45)Co_(0.11)Rh_(0.08))_(∑2.01)S_(3.97). Five strongestlines (hkl, d, I) of X-ray powder diffraction data of malanite are 3.1,2.98(6); 400,2.48(5);3.3. 1.90(7); 440, 1.75(10); 73., 1.29(5). It was known on the basis of X-ray powder diffractiondata that malanite is cubic, and the space group is Fd3. with α=0.9940nm, V=0.9821(3.nm^3.and Z=4. The type material of malanite is deposited at the Geological Museum of China(GMC)s

关键词： new mineral malanite chrome ore

δD values of escaped H_2 from hot springs at the Tengchong Rehai geothermal area and its origin

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chinese Science Bulletin 2002年第2期47卷 146-149页

作者： SHANGGUAN Zhiguan & HUO Weiguo institute of Geology, China Seismological Bureau, beijing 100029, China institute of Geology and Geophysics,{3., beijing 100029, China institute of Geology China Seismological Bureau Beijing 100029 China

Here we give the δD values of escaped H2 from hot springs at the Tengchong Rehai and adjacent regions, and deal with a genetic correlation between the increment H2 in escaped gases from middle-shallow reservoirs and the H2S, CH4 derived from deep sources. Isotopic compositions of H2 indicate that the generation of increment H2 may be related to recent strong activity of N-W trending fault at the Rehai area. Trace monitoring the H2 release could be significant in order to keep watch on present activity of that fault.

关键词： Rehai geothermal area hydrogen stable isotopic composition.

Uniform design over a convex polyhedron

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chinese Science Bulletin 1999年第2期44卷 112-114页

作者： FANG Kaitai , TIAN Guoliang XIE Minyu Hong Kong Baptist University, Kowloon, Hong Kong, China institute of Applied Mathematics, chinese academy of sciences, beijing 1.0080, China Central China Normal University, Wuhan 43.070, ChinaCorresponding author: {3. address: Department of Probability and Statistics, Peking University, beijing 100871, China Hong Kong Baptist University Hong Kong China institute of Applied Mathematics Chinese Academy of Sciences Beijing China Central China Normal University Wuhan China

A new method, called the simplex method, is proposed to generate the uniform design over a convex polyhedron in n-dimensional Euclidean

关键词： convex polyhedron experimental design uniform design.

Role of dNTPs in Mutagenesis

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Biomedical and Environmental sciences 1998年第4期11卷 345-353页

作者： LEI HAI-XIN LI ZHONG-SHENG XIE DA-YING LIU BING-CI ZUO JIN AND FANG FU-DE (institute of Basic Medical sciences, chinese {3. of Medical sciences (CAMS), beijing 100005, China) (institute of Occupotional Medicine, chinese {3. of Preventive Me institute of Basic Medical sciences Chinese Academy of Medical Sciences (CAMS) Beijing China.

The induced mutation frequency by alkylating mutagen glycldyl methacrylate (GMA) and N-methyl-N'- nitro- N-nitrosoguanidine (MNNG) was investigated with or without perturbation of deoxyribenucleoside triphosphate (dNTP)pools; the influence of short treatment at different concentrations of GMA or MNNG on dNTP pools was also explored. The results indicated that the induced mutation frequency increased greatly at high dosages of mutagen (GMA~ 64 μg/ml, MNNG~ 8 μg/ml) and the perturbation on dNTP pools was carried out before the treatment of mutagen; the short treatment with mutagen could induce distinct fluctuations of dNTP pools, but different mutagen might have different effects on dNTP *** to the results of the present study and other reports in literature, we conclude that dNTP pools may be the targets of alkylating mutagens and the fluctuations of dNTP pools are closely associated with mutagenesis

关键词： DNA Res Role of dNTPs in Mutagenesis

A carinate bird from the Upper Jurassic of western Liaoning, China

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chinese Science Bulletin 1997年第5期42卷 413-417页

作者： HOU Lianhaiinstitute of Vertebrate Paleontology and Paleoanthropology, chinese academy of sciences, beijing 100044, China institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing China

AFTER the publication of the fossil bird Confuciusorins, additional skeletons of fossil birds have been found by Hou Lianhai, Hu Yaoming, Wang Ping, Gu Yucai and Sun Yutie in the Yixian Formation of Beipiao, Liaoning Province. The new locality is about 3.km southwest of that of Confuciusorins. Among those specimens were two of Confuciusorins and two new birds. A well-developed carina was found on the smallest specimen, a feature not found in the Jurassic birds, such as Archaeopteryx and Confuciusorins. The new Jurassic fossil bird is described in the present note.

关键词： Beipiao of Liaoning Late Jurassic Aves carina.

Difference Scheme for Hyperbolic Heat Conduction Equation with Pulsed Heating Boundary

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Journal of Thermal Science 2000年第2期9卷 152-157页

作者： Li Ji Zhang Zhengfang Liu Dengying (institute of Engineering Thermophysics, chinese academy of sciences, beijing 1.0080, China) institute of Engineering Thermophysics Chinese Academy of Sciences Beijing China

In this paper, the authors have analyzed the second-order hyperbolic differential equation with pulsed heating boundary, and tried to solve this kind of equation with numerical method. After analyzing the error of the difference scheme and comparing the numerical results with the theoretical results, the authors present some examples to show how the thermal wave propagates in materials. By analyzing the calculation results, the conditions to observe the thermal wave phenomena in the laboratory are conferred. Finally the heat transfer in a complex combined structure is calculated with this method. The result is quite different from the calculated result from the parabolic heat conduction equation.

关键词： second-order hyperbolic differential equation pulsed heating boundary numerical method