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| 1 | Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin显示文摘It has been proved to be a difficult problem to determine directly trapping pressure of fluid inclusions. Recently, PVT simulation softwares have been applied to simulating the trapping pressure of petroleum inclusions in reservoir rocks, but the reported methods have many limita- tions in practice. In this paper, a method is suggested to calculating the trapping pressure and temperature of fluid inclusions by combining the isochore equations of a gas-bearing aqueous inclusion with its coeval petroleum inclusions. A case study was conducted by this method for fluid inclusions occurring in the Upper-Paleozoic Shanxi Formation reservoir sandstones from the Ordos Basin. The results show that the trapping pressure of these inclusions ranges from 21 to 32 MPa, which is 6─7 MPa higher than their minimum trapping pressure although the trapping temperature is only 2─3℃ higher than the homogenization temperature. The trapping pressure and temperature of the fluid inclusions decrease from southern area to northern area of the basin. The trapping pressure is obviously lower than the state water pressures when the inclusions formed. These data are consistent with the regional geological and geochemical conditions of the basin when the deep basin gas trap formed. | MI Jingkui1,2,XIAO Xianming1,LIU Dehan1,& SHEN Jiagui1 1.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China 2.Institute of Sedimentary Mineral and Resources,Department of Civil Engineering,Xiangtan Polytechnic University,Xiangtan 411201,China | 2004 | Science China Earth Sciences2004，47，6： | 10 |
| 2 | The Control Efficiency of Plant Alcohol Extracts on the Laboratory Populations of Myzus persicae(Sulzer)and Lipaphis erysimi (Kaltenbach)显示文摘The effects of semiochemicals extracted from 63 species of plants, on peach aphid (Myzus persicae) and mustard aphid (Lipaphis erysimi), were studied in laboratory. The deterrent rate, reproduction deterrent index and the interferential index of population control (ⅡPC) was used to evaluate the efficiency of semiochemicals on population control of the two target aphids. The results showed that the extracts of 34 species of common plants have noticeable effect on both aphid populations, especially, Xanthium sibiricum Petr.Et Widd. and Syngonium podophyllum Schott. These plant extracts could be used to construct the plant protectant to protect crops. | ZHOU Qiong, LIANG Guang-wen ,ZENG Ling and SHEN Shu-ping(Department of Biology, Xiangtan Normal University, Xiangtan 411201 , P. R. China Laboratory of Insect Ecology , South China Arigcultural University ,Guangzhou 510642 , P. R. China) | 2002 | Agricultural Sciences in China2002，1，11： | 8 |
| 3 | Calculation and characteristics analysis of blade pitch loads for large scale wind turbines显示文摘Based on the electric pitch system of large scale horizontal-axis wind turbines,the blade pitch loads coming mainly from centrifugal force,aerodynamic force and gravity are analyzed,and the calculation models for them are established in this paper.For illustration,a 1.2 MW wind turbine is introduced as a practical sample,and its blade pitch loads from centrifugal force,aerodynamic force and gravity are calculated and analyzed separately and synthetically.The research results showed that in the process of rotor rotating 360o,the fluctuation of blade pitch loads is similar to cosine curve when the rotor rotational speed,in-flow wind speed and pitch angle are constant.Furthermore,the amplitude of blade pitch load presents quite a difference at a different pitch angle.The ways of calculation for blade pitch loads are of the universality,and are helpful for further research of the individual pitch control system. | DAI JuChuan1,2,HU YanPing1,LIU DeShun1,2 & LONG Xin3 1 School of Electromechanical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China 2 College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China 3 Hara XEMC Windpower Co.,Ltd.,Xiangtan 411000,China | 2010 | Science China(Technological Sciences)2010，53，5： | 7 |
| 4 | Preparation of polystyrene/silica nanocomposites by radical copolymerization of styrene with silica macromonomer显示文摘A two-stage process has been developed to generate the silica-based macromonomer through surface-modification of silica with polymerizable vinyl groups. The silica surfaces were treated with excess 2,4-toluene diisocynate (TDI), after which the residual isocyanate groups were converted into polymerizable vinyl groups by reaction with hydroxypropylacrylate (HPA). Thus, polystyrene/silica nanocomposites were prepared by conventional radical copolymerization of styrene with silica macromonomer. The main effecting factors, such as ratios of styrene to the macromonomer, together with polymerization time on the copolymerization were studied in detail. FTIR, DSC and TGA were utilized to characterize the nanocomposites. Experimental results revealed that the silica nanoparticles act as cross-linking points in the polystytene/silica nanocomposites, and the glass transition temperatures of the nanocomposites are higher than that of the corresponding pure polystyrene. The glass transition temperatures of nanocomposites increased with the increasing of silica contents, which were further ascertained by DSC. | OU BaoLi1,2 & LI DuXin2 1 College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China 2 State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China | 2007 | Science China Chemistry2007，50，3： | 6 |
| 5 | The Survival Probability in Generalized Poisson Risk Model显示文摘In this paper we generalize the aggregated premium income process from a constant rate process to a poisson process for the classical compound Poinsson risk model,then for the generalized model and the classical compound poisson risk model ,we respectively get its survival probability in finite time period in case of exponential claim amounts. | GONG Ri-zhao( Institute of Mathematics and Software, Xiangtan Polytechnic University, Xiangtan 411201, China) | 2003 | Chinese Quarterly Journal of Mathematics2003，18，2： | 6 |
| 6 | Preparation of well-defined polystyrene/silica hybrid nanoparticles by ATRP显示文摘Immobilization of the atom transfer radical polymerization (ATRP) macroinitiators at the silica nanoparticle surfaces was achieved through surface modification with excess toluene-2,4-diisocynate (TDI), after which the residual isocyanate groups were converted into ATRP macroinitiators. Structurally well-defined polystyrene chains were grown from the nanoparticle surfaces to yield individual particles composed of a silica core and a well-defined, densely grafted outer polystyrene by ATRP, which was initiated by the as-synthesized silica-based macroinitiator. FTIR, NMR and gel permeation chro-matography (GPC) were used to characterize the polystyrene/silica hybrid particles. | OU BaoLi1,2 LI DuXin2 1 College of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201, China 2 State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083, China | 2008 | Science China Chemistry2008，51，1： | 6 |
| 7 | Two remarks on quenching phenomenon for semilinear parabolic equations显示文摘THIS letter discusses the following initial-boundary value problem: where (?)Ω is the boundary of domain Ω, f(s): [0, b)→(0, +∞) satisfy Because this problem has strong background of physics and geometry, it has attracted much attention in recent years. The main results can be found in ref. [1]. Here we give only a result of reference [2]. | DAI Qiuyi and GU Yonggeng1 Xiangtan Mining Institute, Xiangtan 411201, China 2 Institute of Systems Science, Chinese Academy of Sciences, Beijing 100080, China | 1997 | Chinese Science Bulletin1997，42，3： | 5 |
| 8 | The Quaternion Matrix Equation ∑A^iXB_i=E | Huang Liping Department of Basic Sciences, Xiangtan Polytechnic University, Xiangtan 411201, China | 1998 | Acta Mathematica Sinica,English Series1998，14，1： | 4 |
| 9 | Influence of steric and intramolecular inductive effects on the variable trends in R-X (R=Alkyl) bond dissociation energy显示文摘The question 'why are the variation trends of R-X bond dissociation energy different?' is answered. The R-X bond dissociation energy (BDE) may be influenced by three main factors: the C-X intrinsic bond energy, the 1,3 geminal repulsion, and the intramolecular charge-induced dipole. In the presence of atom X, the variation trend of BDE in R-X (R= Me, Et, i-Pr, t-Bu) is dominated by two factors, the 1,3 geminal repulsion and the intramolecular charge-induced dipole. The former decreases the R-X BDE, and the latter either increases or decreases the R-X BDE. For the series of R-X with the R-C bond (such as R-Me, R-CH == CH2, R-C≡CH, and R-CN), the 1,3 geminal repulsion decreases the R-X BDE, and the variation trends of R-C BDE decrease from Me to t-Bu. As regards the series of R-X (such as R-H, R-BH2, and R-SiH2) in which the electronegativity of atom X is smaller than that of the carbon atom, the above two factors decrease the R-X BDE, and the variation trends of the R-X BDE decrease from Me to t-Bu. As to the series of R-X (such as R-F, R-OH, R-Cl, R-Br, R-I, and R-NH2) in which the electronegativity of atom X is larger than that of the carbon atom, the 1,3 geminal repulsion decreases the R-X BDE, while the intramolecular charge-induced dipole increases the R-X BDE. In this case, the variation trends of R-X BDE depend on the competition of the two factors. As a result, some of them (e. g., R-F, R-OH) increase from Me to t-Bu, some (e. g., R-I) decrease from Me to t-Bu, and some (e. g., R-Br) change very little. | CAO ChenZhong School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China | 2009 | Science China Chemistry2009，52，7： | 4 |
| 10 | Novel nanoporous binary Ag-Ni electrocatalysts for hydrazine oxidation显示文摘From an aqueous mixture of Ag(I)-EDTA complex and Ni(II) nitrate, silver and nickel particles were co-deposited on the surface of titanium substrates by the hydrothermal method using hydrazine hydrate as a reduction agent. The prepared titanium-supported nano-scale Ag and Ag-Ni particles (nano Ag/Ti, nano Ag86Ni14/Ti, nano Ag77Ni23/Ti, and nano Ag74Ni26/Ti) exhibit nanoporous 3D network textures. Their electrocatalytic activity towards hydrazine oxidation in alkaline solutions was evaluated by cyclic voltammetry and chronoamperometry. The results show that the four samples present a low onset potential of ca. -0.60 V vs. SCE and considerably high and stable anodic current densities for hydrazine oxidation. Among them, the nano Ag86Ni14/Ti electrode exhibits the highest anodic current density towards hydrazine oxidation, showing an increment of electro-active sites on the nano Ag86Ni14/Ti due to the addition of Ni to Ag particles. | YI Qingfeng, LI Lei, YU Wenqiang, LIU Xiaoping, ZHOU Zhihua, and NIE Huidong School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China | 2010 | Rare Metals2010，29，1： | 3 |
| 11 | Ameliorative Effects of Brassinosteroid on Excess Manganese-Induced Oxidative Stress in Zea mays L. Leaves显示文摘Manganese (Mn) is becoming an important factor limiting crop growth and yields especially on acid soils. The present study was designed to explore the hypothesis that brassinosteroid application can enhance the tolerance of maize (Zea mays L.) to Mn stress and if so, whether or not the mechanism underlying involves regulation of antioxidative metabolism in leaves. The effects of 24-epibrassinosteroid (EBR) on the growth, photosynthesis, water status, lipid peroxidation, accumulation of reactive oxygen species, and activities or contents of antioxidant defense system in maize plants under Mn stress were investigated by a pot experiment. At supplemented Mn concentrations of 150-750 mg kg-1 soil, the growth of plants was inhibited in a concentration-dependent manner. The semi-lethal concentration was 550 mg Mn kg-1 soil. Foliage application with 0.1 mg L-1 EBR significantly reduced the decrease in dry mass, chlorophyll content, photosynthetic rate, leaf water content, and water potential of plants grown in the soil spiked with 550 mg kg-1 Mn. The oxidative stress caused by excess Mn, as reflected by the increase in malondialdehyde (MDA) content and lipoxygenase (LOX, EC 1.13.11.12) activity, accumulation of superoxide radical and H2O2, was greatly decreased by EBR treatment. Further investigations revealed that EBR application enhanced the activities of superoxide dismutase (SOD, EC 1.15.1.1), peroxidase (POD, EC 1.11.1.7), catalase (EC 1.11.1.6), ascorbate peroxidase (APX, EC 1.11.1.11), dehydroascorbate reductase (DHAR, EC 1.8.5.1), and glutathione reductase (GR, EC 1.6.4.2), and the contents of reduced ascorbate and glutathione, compared with the plants without EBR treatment. It is concluded that the ameliorative effects of EBR on Mn toxicity are due to the up- regulation of antioxidative capacity in maize under Mn stress. | WANG Hai-hua, FENG Tao, PENG Xi-xu, YAN Ming-li, ZHOU Ping-lan and TANG Xin-ke School of Life Sciences, Hunan University of Science and Technology, Xiangtan 411201, P.R.China | 2009 | Agricultural Sciences in China2009，8，9： | 2 |
| 12 | 间甲酚直接氧化合成间羟基苯甲醛产品的检出与测定显示文摘研究了间甲酚直接氧化合成间羟基苯甲醛产品的检出与测定方法 ,研究表明 ,采用电位滴定法进行测定 ,方法简便易行 。 | LIU Jun-feng (Institute of Chemical Hi-tech., Xiangtan 411201, China) | 2001 | 理化检验(化学分册)2001，37，4： | 2 |
| 13 | Furfural residues from straw become complex fertilizer by addition method显示文摘IntroductionFurfuralisakindofimportantrawmaterialinchemicalindustry.Withthegrowthofitsuse,itsproductionisincreasingannually.Bu?.. | LIU Jun\|feng,YI Ping\|gui,CHEN An\|guo (Department of Chemical Engineering, Xiangtan Polytechnic University, Xiangtan 411201, China) | 2000 | Journal of Environmental Sciences2000，12，2： | 2 |
| 14 | SOLVABILITY OF A QUATERNION MATRIX EQUATION显示文摘This paper discusses the solvability of quaternion matrix equation A *X *B *±B X A=D and obtains it’s general explicit solutions in terms of A,B,D and their Moore Penrose inverses. | Cao WenshengInstitute of Math.,Xiangtan Polytechnic Univ.,Xiangtan 411201,China. | 2002 | Applied Mathematics(A Journal of Chinese Universities)2002，17，4： | 2 |
| 15 | On the reconstruction of Dirichlet-to-Neumann map in inverse scattering problems with stability estimates显示文摘Consider the determination of Dirichlet-to-Neumann(D-to-N) map from the far-field pattern in inverse scattering problems,which is the key step in some recently developed inversion schemes such as probe method.Essentially,this problem is related to the reconstruction of the scattered wave from its far-field data.We firstly prove the well-known uniqueness result of the D-to-N map from the far-field pattern using a new scheme based on the mixed reciprocity principle.The advantage of this new proof scheme is that it provides an efficient algorithm for computing the D-to-N map,avoiding the numerical differentiation for the scattered wave.Then combining with the classical potential theory,a simple and feasible regularizing reconstruction scheme for the D-to-N map is proposed.Finally the stability estimate for the reconstruction with noisy input data is rigorously analyzed. | WANG HaiBing 1,2 & LIU JiJun 1 1 Department of Mathematics,Southeast University,Nanjing 210096,China 2 School of Mathematics and Computational Science,Hunan University of Science and Technology,Xiangtan 411201,China | 2010 | Science China Mathematics2010，53，8： | 2 |
| 16 | THE FINITE ELEMENT PROBABILITY COMPUTATIONAL METHOD FOR PARABOLIC INTEGRO-DIFFERENTIAL EQUATIONS显示文摘In this paper, we analyze the Galerkin approximation of parabolic integro-differential equation. A probability computational method for the equation is proposed.The method is based on the backward Euler scheme,the left rectangle rule and the probability transfer matrices. | LIU Xiaoqi LIU Jinwang(Department of Mathematics, Xiangtan Normal University, Xiangtan 411201, China) | 1999 | Systems Science and Mathematical Sciences1999，12，4： | 1 |
| 17 | RELIABILITY AND OPTIMIZATION DESIGN OF NEW ROLLER ORIENTATION CLUTCH显示文摘The mechanical reliability and optimization theory on the method of reliability-optimization design for the new roller orientation clutch is provided. The result of reliability-optimization design is compared with the result of the conventional design method. | Luo Yixin Department of Resources Engineering,Xiangtan Polytechnic Uneversity, Xiangtan 411201,China | 2002 | Chinese Journal of Mechanical Engineering2002，15，1： | 1 |
| 18 | QUENCHING PHENOMENA FOR SYSTEMS OF SEMILINEAR PARABOLIC EQUATIONS I显示文摘Initial-boundary value problems for a class of systems of semilinear parabolicequations with singular terms are investigated, conditions for the existence and nonexistence of the global solutions to the above problems are given, and upper bounds of thequenching time and the critical length are obtained. | DAI Qiuyi(Department of Basic Science, Xiangtan Mining Institute, Hunan Xiangtan 411201, China)GU Yonggeng(Institute of Systems Science, Academia Sinica, Beijing 100080, China) | 1997 | Systems Science and Mathematical Sciences1997，10，4： | 1 |
| 19 | 显示文摘 | CAI Tiejun1 LIAO Yuchao2 PENG Zhenshan1 LONG Yunfei1 WEI Zongyuan1 DENG Qian1 1. College of Chemistry & Chemical Engineering Hunan University of Science & Technology Xiangtan 411201 China.2. Institute of Process Engineering Chinese Academy of Sc | 2009 | Journal of Environmental Sciences2009，，07： | 1 |
| 20 | Relationship between changes of endogenous ABA level and resistance in hybrid rice under temperature stress显示文摘We studied the relationship between endogenous ABA and resistance to temperature stress in seedlings of hybrid rice. The hybrid rice Combinations Shanyou 63, Shanyou 287, Weiyou 63, and Weiyou 287 were treated under 2℃ and 42℃ respectively for 48 h. Endogenous ABA concentrations were obtained by gas chromatography with electron capture detector ( GC-ECD ) and a nickel labelled external standard. Leakage of electrolytes were determined. | Li Ling ,Fu Chong,and GUO Shao chuan,Xiangtan Teachers College ,Hunan 411201,China | 1994 | Chinese Rice Research Newsletter1994，2，1： | 1 |
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