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Science China chemistry 2004年第6期47卷 507-511页

作者： LI Li1, WU Qingsheng1 DING Yaping2.& LI Ping3.1. department of {2., Tongji university, Shanghai 2.0092. China 2. department of {2., Shanghai university, Shanghai 2.043., China 3. department of Food, Anhui Agricultural university, Hefei 2.0}03., China department of chemistry Tongji University Shanghai 200092 China

Multi-armed nanorods and nanobars of semiconductor selenium were simultane- ously synthesized in the light of biomineralization process through bio-membrane bi-templates of rush at room temperature. The multi-armed nanorods are 60 nm in diameter and 1.5 μm in length; the nanobars are 150 nm in diameter and 1000—1100 nm in length. The XRD pattern indicates that these nanocrystals were crystallized in the hexagonal structure with lattice constants a = 0.43. nm, c = 0.495 nm. The possible formation mechanism was investigated.

关键词： selenium, multi-armed nanorods, nanobars, bio-membrane, bi-templates.

AN EXTREMAL APPROACH TO BIRKHOFF QUADRATURE FORMULAS

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Journal of Computational Mathematics 2001年第5期19卷 459-466页

作者： Ying-guang Shi (department of Mathematics, hunan Normal {2., {3. 410081, China) 湖南师范大学湖南长沙 410081

Discusses an extremal problem with Birkhoff interpolation constraints. Quadrature formula derived from an extremal problem; Overview of auxiliary lemmas; Derivation of some properties of polynomials.

关键词： an extremal approach Birkhoff quadrature formulas

THE SENSITIVITY OF RESPONSE SIGNAL OF SPECTROELECTROchemistry(SEC)

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Chinese Chemical Letters 1992年第6期3卷 465-466页

作者： Yuan Bao ZHU Qing Ji XIE Lian Hong CHEN Shuang E HE department of chemistry and Chemical Engineering,{2., {3. 410082.

In this paper, we propose the use of the molar absorbance/ potential ratio to measure quantitatively the sensitivity of response signal of SEC cell and the system under study. A simple equation was developed, and the major factors influencing the sensitivity were also assessed. The results obtained this way were in good agreement with actual cases.

关键词： SEC THE SENSITIVITY OF RESPONSE SIGNAL OF SPECTROELECTROchemistry length

Stability Caused by Impulses for Delay Difierential Equations

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Acta Mathematica Sinica,English Series 1997年第2期13卷 193-198页

作者： Yu Jianshe (department of Applied Mathematics,hunan {2.,{3. 410082.China)

In the present paper sufficient conditions are obtained for the stability of the zero solution of a nonlinear delay differential equation caused by impulses.

关键词： Delay differential equation Stability Impulse

Selection of Weather Parameters for Air-Conditioning System Design for Buildings with Long Thermal Lag

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湖南大学学报（自然科学版） 2009年第S1期36卷 79-82页

作者： GE Lian-feng1,2.LEI Ming3.CHEN You-ming1,2.1.College of Civil Engineering,hunan {2.,changsha,hunan 410082.China 2.Key Laboratory of Building Safety and Energy Efficiency,MOE,China (3.Aviation Theory department,Aviation {2. of Air Force,Changchun,Jilin 13.02.,China) College of Civil Engineering Hunan University Changsha 410082 China Key Laboratory of Building Safety and Energy Efficiency China Aviation Theory department Aviation University of Air Force Changchun 130022 China

Two building factors-a longer thermal lag of more than one hour for building envelops and a lag of indoor radiation to convert into cooling load-have impact on the instantaneous heat input and instantaneous cooling *** the two factors should be taken into account when selecting the weather parameters for air-conditioning system *** paper developed a new statistic method for the rational selection of coincident solar irradiance,dry-bulb and wet-bulb *** method was applied to historic weather records of 2. years in Hong Kong to generate coincident design weather *** the results show that traditional design solar irradiance,dry-bulb and wet-bulb temperatures may be significantly overestimated in many conditions,and the design weather data for the three different constructions is not kept constant.

关键词： building construction thermal lag system capacity design weather data air-conditioning

Prediction of the amount of urban waste solids by applying a gray theoretical model

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Journal of Environmental Sciences 2003年第1期15卷 43-46页

作者： LI Xiao ming, ZENG Guang ming, WANG Ming, LIU Jin jin (department of Environmental Science and Technology, hunan university, {2. {3. China. department of Environmental Science and Technology Hunan University Changsha 410082 China

Urban waste solids are now becoming one of the most crucial environmental problems. There are several different kinds of technologies normally used for waste solids disposal, among which landfill is more favorable in China than others, especially for urban waste solids. Most of the design works up to now are based on a roughly estimation of the amount of urban waste solids without any theoretical support, which lead to a series problems. To meet the basic information requirements for the design work, the amount of the urban waste solids was predicted in this research by applying the gray theoretical model GM (1,1) through non linear differential equation simulation. The model parameters were estimated with the least square method (LSM) by running a certain MATALAB program, and the hypothesis test results show that the residual between the prediction value and the actual value approximately comply with the normal distribution N (0,0 2. 2., and the probability of the residual within the range (-0 17, 0 19) is more than 95%, which indicate obviously that the model can be well used for the prediction of the amount of waste solids and those had been already testified by the latest two years data about the urban waste solids from Loudi City of China. With this model, the predicted amount of the waste solids produced in Loudi City in the next 3. years is 8049000 ton in total.

关键词： gray theoretical model prediction waste solids

INTERVAL FINITE VOLUME METHOD FOR UNCERTAINTY SIMULATION OF TWO-DIMENSIONAL RIVER WATER QUALITY

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Journal of Hydrodynamics 2004年第4期16卷 455-463页

作者： HELi ZENGGuang-ming] HUANGGuo-he LUHong-wei departmentofEnvironmentalSystemEngineering UniversityofReginaSaskatchewanS4S0A2Canada departmentofEnvironmentalScienceandEngineering HunanUniversityChangsha410082China

Under the interval uncertainties, by incorporating the discretization form offinite volume method and interval algebra theory, an Interval Finite Volume Method (IF-VM) wasdeveloped to solve water quality simulation issues for two-dimensional river when lacking effectivedata of flow velocity and flow quantity. The IFVM was practically applied to a segment of theXiangjiang River because the Project of hunan Inland Waterway Multipurpose must be started workingafter the environmental impact assessment for it. The simulation results suggest that there existrather apparent pollution zones of BOD_5 downstream the Dongqiaogang discharger and that of CODdownstream Xiaoxiangjie discharger, but the pollution sources have no impact on the safety of thethree water plants located in this river segment. Although the developed IFVM is to be perfected, itis still a powerful tool under interval uncertainties for water environmental impact assessment,risk analysis, and water quality planning, etc. besides water quality simulation studied in thispaper.

关键词： interval finite volume method (IFVM) uncertainty simulation water quality

Effect of matrix cracking on the time delayed buckling of viscoelastic laminated circular cylindrical shells

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Science China(Technological Sciences) 2008年第12期51卷 2142-2154页

作者： PENG Fan,FU YiMing & CHEN YaoJun College of Mechanics and Aerospace,hunan university,{2. {3.China College of Mechanics and Aerospace Hunan University

The effect of matrix cracking on the bifurcation creep buckling of viscoelastic laminated circular cylindrical shells is *** viscoelastic behavior of laminas is modeled by Schapery's integral constitutive equation with growing matrix *** values of damage variables are correlated to non-dimensional density of matrix cracks relying on the formulas from mesomechanics approach,and the evolution equation predicting the growth rate of density of matrix cracks is assumed to follow a power type relation with transverse tensile *** governing equations for prebuckling creep deformation and bifurcation buckling of laminated circular cylindrical shells under axial compression are obtained on the basis of the Donnell type shallow shell theory and Kármán-Donnell geometrically nonlinear *** solution strategy is constructed by integrating finite-difference technique,trigonometric series expansion method and Taylor's numerical recursive scheme for convolution *** bifurcation creep buckling of symmetrically laminated glass-epoxy circular cylindrical shells with matrix creep cracking coupled are examined for various geometrical parameters and parameters of damage evolution as well as boundary *** numerical results show that matrix creep cracking remarkably shortens the critic time of bifurcation buckling and reduces the durable critic loads,and its effects become weak and finally vanish with the increase of the ratio of radius to thickness in the case of short laminated circular cylindrical shells,also the influence of the matrix creep cracking is mainly dependent on the boundary conditions at two ends for moderately long circular cylindrical shells.

关键词： viscoelasticity matrix cracking laminated circular cylindrical shell pre-buckling bifurcation creep

BASIC ELECTROLYTIC METHOD FOR RECOVERY OF LEAD FROM SCRAP BATTERIES

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中国有色金属学会会刊：英文版 1996年第4期6卷 47-51页

作者： Chen Weiping Tian Yizhuang Bian Kejun Zheng Yue(Institute for Environmental Protection,hunan university,{2. {3. Institute for Environmental Protection Hunan University Changsha 410082 China Xiongdong Chemical Machinery Factory

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关键词： battery sludge lead recovery electrowinning

SWITCHED-CURRENT FILTER DESIGN USING CASCADED SECTIONS

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Journal of Electronics(China) 1993年第3期10卷 273-278页

作者：吴杰 department of EE Hunan University Changsha 410082

A new analogue sampled-data active device, named as a switched-current operationalamplifier (SIOA), is presented. The use of active circuit elements may simplify drawing the circuitdiagram significantly greatly and may permit easier analysis and synthesis of SI networks. Anumber of all pole and elliptic (second-or third-order) switched-current (SI) filters are derivedfrom the switched capacitor prototypes. These can be used as simple self-contained filters or asfilter sections in the cascaded realizations of a higher order transfer functions. To illustrate theapproach, a fifth-order low-pass filter is designed.

关键词： Circuit theory and design Switched-Current Active filter