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THE CLAR FORMULAS OF REGULAR t-TIER STRIP BENZENOID SYSTEMS

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Systems Science and Mathematical Sciences 1995年第4期8卷 327-337页

作者： ZHANG Heping(department of Mathematics,Lanzhou university,Lanzhou 730000,{2.) 兰州大学数学系甘肃兰州

ＴＨＥＣＬＡＲＦＯＲＭＵＬＡＳＯＦＲＥＧＵＬＡＲｔ－ＴＩＥＲＳＴＲＩＰＢＥＮＺＥＮＯＩＤＳＹＳＴＥＭＳＴＨＥＣＬＡＲＦＯＲＭＵＬＡＳＯＦＲＥＧＵＬＡＲｔ－ＴＩＥＲＳＴＲＩＰＢＥＮＺＥＮＯＩＤＳＹＳＴＥＭＳ￥ＺＨＡＮＧ... 详细信息

ＴＨＥＣＬＡＲＦＯＲＭＵＬＡＳＯＦＲＥＧＵＬＡＲｔ－ＴＩＥＲＳＴＲＩＰＢＥＮＺＥＮＯＩＤＳＹＳＴＥＭＳＴＨＥＣＬＡＲＦＯＲＭＵＬＡＳＯＦＲＥＧＵＬＡＲｔ－ＴＩＥＲＳＴＲＩＰＢＥＮＺＥＮＯＩＤＳＹＳＴＥＭＳ￥ＺＨＡＮＧＨｅｐｉｎｇ（Ｄｅｐａｒｔｍｅｎｔ...

关键词： Benzenoid system perfect matching Clar formula.

Catalytic Acylation of Anisole over Some Zeolites

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Chemical Research in Chinese Universities 2000年第3期16卷 191-197页

作者： ZHAO Zhen hua (College of Chemistry and Chemical Technology, Hunan normal university, Changsha 410081, P. R. {2.) (Received Sept. 2., 1999) Hunan normal Univ Coll Chem & Chem Technol Changsha 410081 Peoples R China

Methoxyacetophenone(4 MAP) was synthesized by the acylation of anisole with acetic anhydride in the presence of HY zeolite. The addition of an appropriate amount of some solvent such as dichloromethane, chloroform, carbon disulfide or chlorobenzene to the reaction system can improve the yield of the acylated product to a certain extent. HY zeolite used can be recovered, and reused after being regenerated, obtaining almost the same yield of 4 MAP as the fresh zeolite.

关键词： Acylation HY zeolite Catalyst Anisole Acetic anhydride Synthesis Aromatic ketone

OUTLIER SCORE TEST IN A GROWTH CURVE MODEL

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Systems Science and Mathematical Sciences 1995年第2期8卷 157-165页

作者： FEI Yu(department of Accounting,Yunnan university, Kunming 650091,{2.) 云南大学会计学系云南昆明

ＯＵＴＬＩＥＲＳＣＯＲＥＴＥＳＴＩＮＡＧＲＯＷＴＨＣＵＲＶＥＭＯＤＥＬＦＥＩＹｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｃｃｏｕｎｔｉｎｇ，ＹｕｎｎａｎＵｎｉｖｅｒｓｉｔｙ，Ｋｕｎｍｉｎｇ６５００９１，Ｃｈｉｎａ）Ａｂｓｔｒａｃ... 详细信息

ＯＵＴＬＩＥＲＳＣＯＲＥＴＥＳＴＩＮＡＧＲＯＷＴＨＣＵＲＶＥＭＯＤＥＬＦＥＩＹｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｃｃｏｕｎｔｉｎｇ，ＹｕｎｎａｎＵｎｉｖｅｒｓｉｔｙ，Ｋｕｎｍｉｎｇ６５００９１，Ｃｈｉｎａ）Ａｂｓｔｒａｃｔ：Ｓｃｏｒｅｔｅｓｔｓｔａｔｉｓ...

关键词： Growth curve model local influence of covariance perturbation score test statistic variance enlargement model

Thermodynamic Calculation of the SrO-Nb_2._5 System

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Journal of Materials Science & Technology 1999年第3期15卷 203-207页

作者： Ying YANG Hao YU and Zhanpeng JIN(department of Materials Science and Engineering, Central South university of Technology, Changsha 410083, {2.) Cent S Univ Technol Dept Mat Sci & Engn Changsha 410083 Peoples R China

The SrO-Nb2.5 quasibinary system is assessed using the Calculation of Phase Diagram (CAL PHAD) technique. A set of self-consistent parameters is obtained and the calculated phase diagram is consistent with the experim... 详细信息

关键词： SrO Thermodynamic Calculation of the SrO-Nb2.5 System

A Class of Plurisubharmonic Functions of Positively Homogeneous of Order ρ

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Systems Science and Systems Engineering 2000年第1期10卷 110-118页

作者： WANG Guang department of Mathematics, Shanxi university, Taiyuan 030006,{2.

In this paper, we construct and discuss some plurisubharmonic functions of positively homogeneous of oder ρ and some weight system, which will be used in the study of the solution of Dirichlet problem for the com... 详细信息

关键词： plurisubharmonic function weight system Monge\|Ampère equation support function

ON THE CONDITIONAL VERSION OFKOLMOGOROV'S THREE-SERIES THEOREM

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Acta Mathematica Scientia 1999年第3期19卷 300-306页

作者：刘国欣 Hebei Univ Technol Dept Math Tianjin 300130 Peoples R China

This paper studies the conditional version of Kolmogorov’s three-series theorem, and gets a new extention form of the conditional version. The results here present us an answer to the question when (or where) the conditional version also provide necessary conditions for convergence in dependent cases. Furthermore, some new sufficient conditions are obtained.

关键词： Three-series theorem dependent r.v. ’s predictable local absolute continuity martingale

A Spectral Index for Estimating Soil Salinity in the Yellow River Delta Region of china Using EO-1 Hyperion Data

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Pedosphere 2010年第3期20卷 378-388页

作者： WENG Yong-Ling GONG Peng ZHU Zhi-Liang department of Surveying and Mapping Engineering College of Transportation Southeast University Nanjing 210096(China) State Key Laboratory of Remote Sensing Science Institute of Remote Sensing Applications of the Chinese Academy ofSciences and Beijing Normal University Beijing 100101 (China) department of Environment Science Policy and Management University of California Berkeley CA 94720 (USA) EROS Data Center U.S. Geological Survey Sioux Falls SD 57198 (USA)

Soil salinization is one of the most common land degradation processes. In this study, spectral measurements of saline soil samples collected from the Yellow River Delta region of china were conducted in laboratory and hyperspectral data were acquired from an EO-1 Hyperion sensor to quantitatively map soil salinity in the region. A soil salinity spectral index (SSI) was constructed from continuum-removed reflectance (CR-reflectance) at 2.52.and 2.03 nm, to analyze the spectral absorption features of the salt-affected soils. There existed a strong correlation (r = 0.91) between the SSI and soil salt content (SSC). Then, a model for estimation of SSC with SSI was established using univariate regression and validation of the model yielded a root mean square error (RMSE) of 0.986 and an R2.of 0.873. The model was applied to a Hyperion reflectance image on a pixel-by-pixel basis and the resulting quantitative salinity map was validated successfully with RMSE = 1.92. and R2.= 0.62.. These suggested that the satellite hyperspectral data had the potential for predicting SSC in a large area.

关键词： hyperspectral reflectance soil salt content spectral absorption features

Almost Everywhere Convergence of Riesz Means on Noncompact Symmetric Space SL(3,H)/SP(3)

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Acta Mathematica Sinica,English Series 1997年第4期13卷 545-552页

作者： Zhu Fuliu department of Mathematics, Wuhan university, Wuhan 430072. {2. department of Mathematics Wuhan University

Let G/K be the noncompact Riemannian symmetric space SL(3, H)/Sp(3). We shall prove in this paper that for f∈L^P(SL(3, H)/Sp(3)), 1≤p≤2. the Riesz means of order z of f with respect to the eigenfunctions expansion of Laplace operator almost everywhere converge to f for Rez>б(n, p). The critical index δ(n,p) is the same as in the classical Stein’s result for Euclidean space. and as in the noncompact symmetric spaces of rank one and of complex type.

关键词： Riemannian symmetric space Riesz means Critical index

Study on the Atomization Mechanism of Hydrides in Graphite Furnace Atomizers

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Chemical Research in Chinese Universities 1991年第2期7卷 84-90页

作者： Wang Zongxiao, Wang Ying and Lin Xianjie (department of Chemistry, Northeast normal {2., Changchun)

The influence of the surface state of the graphite furnace atomizer on the atomization of hydrides has been studied by means of surface film coating and quantum chemistry CN-DO/2.calculations. The results of the study prove that the atomization of AsH3, SbH3 and BiH3 in the graphite furnace atomizer is not a simple gas phase pyrolytic process, but a surface catalysis pyrolytic process.

关键词： FLA Hydride AAS Atomization mechanism