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CMC surfaces in the hyperbolic 3.space

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Chinese Science Bulletin 1998年第7期43卷 547-550页

作者： YU Zuhuan 1, 2.and LI Zhenqi 1, 3.1. Institute of Mathematics, Fudan University, Shanghai 2.043.,{2. 2. Department of Mathematics,{3. union University,{3.,{2. 3. Department of Mathematics, Nanchang University, Nanchang 3. nstitute of Mathemalics Fudan University Shanghai China Department of Mathematics Sichuan Union University Chengdu China Department of Mathematics Nanchang University Nanchang China

CMC-H surfaces satisfying H≥1 are studied. It is proved that these surfaces possess a natural representation which is a generalization of the Bryant’s result.

关键词： hyperbolic space CMC surface Weierstrass representation.

Nonlinear Analysis on Vertical Distribution of Suspended Load

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Communications in Nonlinear Science and Numerical Simulation 1998年第2期3卷 19-23页

作者： Fuquan WANG, Houqiang LI and Jing DING (sichuan union University,{2.,{{3.,china) sichuan union University Chengdu 610064 China

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｔｕｄｉｅｓｏｎｖｅｒｔｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｓｅｄｉｍｅｎｔｉｎｎａｔｕｒａｌｒｉｖｅｒｓｈａｖｅｉｍｐｏｒｔａｎｔｔｈｅｏｒｅｔｉｃａｌｍｅａｎｉｎｇｓａｎｄｅｎｇ... 详细信息

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｓｔｕｄｉｅｓｏｎｖｅｒｔｉｃａｌｄｉｓｔｒｉｂｕｔｉｏｎｏｆｓｅｄｉｍｅｎｔｉｎｎａｔｕｒａｌｒｉｖｅｒｓｈａｖｅｉｍｐｏｒｔａｎｔｔｈｅｏｒｅｔｉｃａｌｍｅａｎｉｎｇｓａｎｄｅｎｇｉｎｅｒｉｎｇａｐｐｌｉｃａｔｉｏ...

关键词： turbulence fractal sediment vertical distribution

Fractional Transport Equation on Random Fractals

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 267-270页

作者： Qiuhua ZENG Houqiang LI and Yaquan FANG (Department of Physics, sichuan union University,{2.,{{3.) Department of Physics Sichuan Union University Chengdu 610064 China

According to the ways of *** and *** with the constitutive equation of diffusive particles in isotropic and homogeneous three dimensions and the Laplace transform we derive the multiscaling fractional transport equati... 详细信息

关键词： probability density comb model transport on fractals

Characteristic analysis for a polynomial-like iterative equation

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Chinese Science Bulletin 1998年第3期43卷 192-196页

作者： Janusz Matkowski 1 and ZHANG Weinian 2.1. Department of Mathematics, Technical University, 43.3.0 Bielsko_Biala, Poland 2. Department of Mathematics, {2. {3. University, chengdu 610064,{3. Department of Mathematics Technical University Bielsko-Biala Poland Department of Mathematics Sichuan Union University Chengdu China

In the light of Euler’s idea for differential equations,a polynomial_like n _order iterative equation is discussed through analyzing its characteristic polynomial. An unproved result is verified rigorously for the fi... 详细信息

关键词： iterative dynamics functional equation characteristic.

Diamond synthesis from a system of chromium-carbide andNi_(70)Mn_(2.)Co_5 alloy

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Chinese Science Bulletin 1998年第24期43卷 2063-2066页

作者： LI Liangbin 1, JIANG Jinchun 1, HONG Shiming 1, ZHONG Yumao 2.and ZHANG Xinyuan 2.1. Institute of Applied Physics, sichuan union University, {2. 610065,{{3. 2. Center for Analysis and Test, sichuan union University, {2. 610065,{{3. Institute of Applied Physics Sichuan Union University Chengdu China Center for Analysis and Test Sichuan Union University Chengdu China

In order to ascertain the mechanism of interaction between carbide and metallic catalyst and formation of diamond under high pressure and high temperature, and find a new method to synthesize diamond with special properties, it is necessary to investigate the reaction behavior of different carbides and metallic solvent_catalysts under high pressure and high temperature. A system of Cr-3.-2.powder and Ni 70Mn 2.Co 5 alloy in weight ratio of 1∶6 was treated under 6 0 GPa and 1 500℃ for 2., 3. or 60 min respectively. X_ray diffraction of the samples indicated the Cr 3. 2.decomposed partially after high pressure and temperature treatment, and Cr 7C 3. Cr and diamond formed respectively. There was not any trace of graphite in the samples. The result suggested that the separated carbon atoms could form diamond directly without conversion process of graphite into diamond. The observation of SEI, WDX and EDX also showed that diamond crystals were synthesized in the system, which have perfect surfaces and shapes, with the average grain size of about 40 μm. The properties of the crystals are being investigated.

关键词： chromium_carbide high pressure synthesis diamond.

Cartesian closedness of categories of completely distributive lattices

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Chinese Science Bulletin 1998年第24期43卷 2059-2063页

作者： ZHANG Dexue 1 and YANG Zhongqiang 2.1. Department of Mathematics, sichuan University, chengdu 610064,{2. 2. Department of Mathematics, Shaanxi Normal University, Xi’an 710062.{2. Department of Mathematics Sichuan University Chengdu China Department of Mathematics Shaanxi Normal University Xi’an China

The category of completely distributive lattices with Scott continuous functions is cartesian closed. Neither the category of completely distributive lattices with arbitrary union preserving mappings nor the category ... 详细信息

关键词： completely distributive lattice continuous lattice cartesian closedness.

Species: Renormalization-group Method

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Communications in Nonlinear Science and Numerical Simulation 1998年第4期3卷 199-203页

作者： Fuxuan CHANG Houqiang LI De LIU and Libin LIN (Department of Physics, Open Laboratory of Radiation Physics and Technology, sichuan union University,{2.,{{3.) Department of Physics Open Laboratory of Radiation Physics and Technology Sichuan Union University Chengdu 610064 China

In this paper, we have studied the structure of DLA with two species by using the kinet real-space renormalization group method introduced by WANG. Following the RG rules and growth processor, We have gained the configuration of 2.2.cell, calculated the fractal dimensions, multifractal spectra, and free energy when different value of p are applied. And we studied the problem of phase transition with different value of p. Our results demonstrate that the change of p doesn't affect the fractal dimension, but can affect the multifractal spectrum and the phase transition.

关键词： DLA with two species phase transition renormalization-group

Enantioselective Reduction of Prochiral Ketones Catalyed by Oxazaborolidine Derived from L-Cystine

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Chinese Chemical Letters 1997年第8期8卷 679-680页

作者： Xing Shu Li Xiao Ling Zhang Ru Gang Xie(Department of Chemistry, sichuan union University, {2., {{3.)(Department of Chemistry, sichuan Educational College, {2., 610041) Department of Chemistry Sichuan Union University Chengdu 610064 China Department of Chemistry Sichuan Educational College Chengdu 610041 China

Two new chiral oxazaborolidine derivated from L-cystine have been used to catalyze the enantioselective reduction of prochiral ketones and the secondary alcohols are obtained with good to excellent opitical yields.

关键词： Enantioselective Reduction of Prochiral Ketones Catalyed by Oxazaborolidine Derived from L-Cystine

RELATIVISTIC CALCULATION OF IONIZATION ENERGIES FOR TITANIUM IONS Ti Ⅰ TO Ti XXII

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原子与分子物理学报 1998年第1期 4-9页

作者： Chen Bo1,2. Tan Mingliang2.Jiang Gang2.Zhu Zhenghe2.Zhao Yongkuan3.( 1 Institute of Nuclear Science and Technology, sichuan {2. University,{3., P. R.{3..2.Institute of Atomic and Molecular Physics, sichuan {2. Un

ＲＥＬＡＴＩＶＩＳＴＩＣＣＡＬＣＵＬＡＴＩＯＮＯＦＩＯＮＩＺＡＴＩＯＮＥＮＥＲＧＩＥＳＦＯＲＴＩＴＡＮＩＵＭＩＯＮＳＴｉⅠＴＯＴｉＣｈｅｎＢｏ１，２ＴａｎＭｉｎｇｌｉａｎｇ２ＪｉａｎｇＧａｎｇ２ＺｈｕＺｈｅｎｇｈｅ... 详细信息

ＲＥＬＡＴＩＶＩＳＴＩＣＣＡＬＣＵＬＡＴＩＯＮＯＦＩＯＮＩＺＡＴＩＯＮＥＮＥＲＧＩＥＳＦＯＲＴＩＴＡＮＩＵＭＩＯＮＳＴｉⅠＴＯＴｉＣｈｅｎＢｏ１，２ＴａｎＭｉｎｇｌｉａｎｇ２ＪｉａｎｇＧａｎｇ２ＺｈｕＺｈｅｎｇｈｅ２ＺｈａｏＹｏｎｇｋｕａｎ３１Ｉｎ...

关键词： Ti ion Ionization energy MCDF technique