CHEN Chang-fu , XIAO Shu-jun , YANG Yu
Abstract:Based on Yu's unified strength theory with material's strain softening property considered,a unified strength criterion for strain softening materials as concrete or rock was put forward to find out the bearing capacity of thickwall cylinder made of such
CAO Wen-gui , HU Jian-li , LU Shan
Abstract:Aiming at the problem that it is difficult for the existing fixed mesh method to determine both equivalent seepage matrix and integral area of crossed free surface elements,a new seepage finite element method called interceptweighted method was proposed,a
SU Yong-hua , JIANG De-song , Zhao Ming-hua
Abstract:Firstly,the interaction principle between surrounding rock and supporting structure for deep underground engineering was studied,and a rule of establishing limit state equation was put forward.The estimation formula of the least load was proposed accordin
HE Yong-jun , ZHOU Xu-hong , DONG Shi-lin
Abstract:A simplified analysis method was studied for reticulated mega-structure in which the main-structure was latticed intersected three-dimensional beam system(LITDBS) because of the long calculating time caused by its large amount of elements and nodes.The eq
GUO Yu-rong , ZHANG Guo-wei , XIAO Yan , LIU Yi-jiang , ZHANG Jie
Abstract:Based on the concept of networked structural laboratories,a platform for remote cooperative/interactive analysis and hybrid dynamic testing of SDOF structures was developed.It was composed of four parts,named control center,physical tester,virtual tester,
YI Wei-jian , HE Qing-feng , XIAO Yan
Abstract:The thesis provides the importance of constructing laboratory database based on structural experiments' specialty and experimental data's importance.Combined with damage diagnosis's characteristic of key laboratory in Hunan University,basic requirements o
YANG Meng-gang , CHEN Zheng-qing
Abstract:Based on the virtual work increment equation of updated Lagrangian formulation,a two-node catenary cable element for the geometrical non-linear analysis of suspension bridge's main cable was developed.Furthermore a fine iterative method of simulating cons
Abstract:Based upon both the existing results of stress concentration analysis and randomly enlarging critical-core theory,a statistical analysis of the ultimate tensile failure process in cross-ply(hybrid) laminates due to the interaction of the matrix cracking i
ZHOU Zhi-xiong , YAN Lan , CAO Zhao-zhan
Abstract:Applying the principles of geometry and kinematics, the mathematical models of grinding wheel, flute and flank were set up. With the transforrnation of coordinates, the drill CAD system was developed on the basis of the mathematical models. With the resul
HAI Gui-chun , GU Zheng-qi , WANG He-yi , ZHOU Yu-kui , LUO Rong-feng
Abstract:Aerodynamic forces and crosswinds were analyzed.Some studies on high speed vehicles' stability in crosswinds were carried out.Based on the multi-body dynamics and virtual prototyping technology,using the software ADAMS,which include two states: straight l
Abstract:Based on the theory of unsteady hydrodynamic lubrication and relevant basic theories of roll gap dynamics,a basic model for unsteady lubrication in the work zone in strip rolling was developed,through which the distribution information of pressure stress
LI Ming , ZHANG Guang-xin , ZHOU Ze-kui
Abstract:Aiming at the problem of two dimensional irregular parts packing, a new optimal packing algorithm was proposed.In order to enhance the operation speed of the algorithm,the algorithm to calculate the least surrounding boxes was improved.In order to enhance
PENG Jin-zhu , WANG Yao-nan , SUN Wei
Abstract:Using wavelet basis function as membership function,fuzzy control and neural network were combined,and the fuzzy inference was realized by neural network.To counteract the defects of BP algorithm and the chances of simple genetic algorithm premature conve
FU Qing , LUO An , TANG Ci , LIU Yao
Abstract:For aberrance current detecing based on the instantaneous reactive power theory,it's difficult for Butterworth filter to acquire famous dynamic and static state characteristics at the same time.This paper proposed an optimized design using Butterworth fil
Abstract:A new technique based on image processing for printing registration deviation detection was proposed.First,the quantization method using cellular decomposition was adopted to quantize images.Then,color centers and Euclidean distance range of color-blocks
CHEN Di-ping , CHEN Yi-xing , XIONG Qi , WANG Zhen-dao
Abstract:A new simple wide-band mixer exploiting MOSFETs working in the linearity region was presented.The mixer meets the high-linearity,low-voltage and low power consumption requirements of wireless systems and has a wide operating frequency range with standard
ZHANG Hong-nan , LIU Xiao-wei , DENG Rong , ZHANG Wei-qing , HU Jin , ZHAO Huan
Abstract:Considering the problem of the chip area and the speed during the design of digital circuit,this paper put forward an optimization method of the AES algorithm.In this paper,the operation of encryption and decryption used the same memorizer.Aiming at the e
LIU You-wen , LI Jia-xin , SHAN Hao-liang
Abstract:This paper studied the interaction of a generalized screw dislocation with interfacial conducting rigid line inclusions by using analysis continuation principle of functions of complex variable,and the general solution of the problem was presented.The clo
Abstract:Based on the matrix formulation of Hamilton's principle,the basic equations with elastic wave propagation in the layered piezoelectric cylindrical bars were obtained.The displacement functions were expressed by the polynomials with different degrees.The e
ZHANG Gao-ming , PENG Jing-cui , XU Yu-feng , JIAN Zhi-jian
Abstract:Based on the electromagnetic theory,the transfer function of left-handed materials was derived,and the effects of parameter deviations on the transfer function were numerically calculated.The numerical simulation showed that the transfer function was sens
YUAN Wu-hua , JI Zhe , CHEN Zhen-hua
Abstract:Spray formed large dimension 7075/SiCp composite was densified by cyclic pressing.Density and microstructure of the composite at different cyclic pressing pass were investigated.The tensile properties of the composite on the condition of T6 treatment were
XU Guo-fu , MOU Shen-zhou , ZHOU Ling-ping , LIAO Su-san , YIN Zhi-min , CUI Fu-zhai
Abstract:We designed a new Polylactide(PLA) based scaffold composite by biomimetic synthesis.The new composite mainly consisted of nano-hydroxyapatite n-HA, which is the main inorganic content in natural bone tissue for the PLA.The crystal degree of the n-HA in th
LIU Xuan-ming , LIU Qiao-ling , XIAO Xiao-juan , TONG Chun-yi , TANG Dong-ying , ZHAO Li-jian
Abstract:A new SDS/isopentanol/cyclohexane/water microemulsion system was studied and was used to synthesize CdSe and CdSe/CdS(core/shell) nanoparticle.We used UV-vis spectroscopy to detect the progress of nucleation and growth of the particles under different con
YUAN Xian-you , LUO He-an , YANG Nian-fa , LIU Yue-jin
Abstract:Ten kinds of long-chain pentaerythritol mono-acetals and diacetals were synthesized through the condensation reaction of pentaerythritol with long-chain aldehydes catalyzed by phosphotungstic acid supported on active carbon under microwave irradiation,and
CHEN Qing , LIU Wei , ZHONG Ke-jun
Abstract:A pattern recognition model for tobacco quality was established by using back-propagation(BP) neural network combined with genetic algorithm,based on the relationship between tobacco quality with expert experience and aroma chemical component in tobacco.E
SU Xiao-kang , ZENG Guang-ming , QIN Xiao-sheng , LIANG Jie
Abstract:Stochastic simulation of the Xiang-jiang River water quality was performed based on the Monte Carlo simulation,and the risks of the traditional deterministic programming results were analyzed.The variable relationship between the risk levels and the corre
WANG Shi-ying , CAI Qiang-guo , LI Zhong-wu , WU Shu-an
Abstract:在野外调查采样的基础上,利用1987年,1995年和2000年的Landsat7 TM影像,在地理信息技术的支持下,研究了浑善达克沙地近期地表覆被变化的特征.研究结果表明:浑善达克沙地近期有明显的变化,变化的幅度约3%~6%,沙地面积约2.2×104km2,核心区面积约1.2×104km2;浑善达克沙地的分布与主导风向相一致;退化草地、片沙、沙丘等裸沙地是构成景观的主体,破碎化是浑善达克沙地的主要特征.此外,草地和退化草地的相互转化明显,是两种主要的防治类型.
WANG Zi-rong , YANG Guan-zhong , Ma Yi-wu , WANG Yu-ke , LU Shao-fei
Abstract:Due to the limit of the border router and the localization in BGP protocol,the network linked to multi-ISP is not able to resolve the problem of the inter-access of outside host and inside host.This paper revealsed the topologic model and the registry inf
XIE Kun , ZHANG Da-fang , WEN Ji-gang , XIE Gao-gang
Abstract:This paper provided a real-time network monitor system based on WinPcap, which supported packet level and flow level traffic metrics such as link utilization, protocol distribution in 2-7 protocol levels, various aggravated flow distribution, top NIP host
Abstract:Based on the idea of balanced loss function,we have presented a new standard for estimating the regressive coefficient of a linear model.Under the new standard,we have gained the parameter estimation and the necessary and sufficient conditions for its unb
XIAO Qing-feng , ZHANG Zhong-zhi , GU Guang-ze
Abstract:The least-squares solutions of inverse problems of generalized antiskew-symmetric matrices on the linear manifold were discussed,and the general expressions of the solution were given.And the optimal approximation solution for generalized anti-skew-symmet
LI Ya , HUANG Li-hong , MENG Yi-min
Abstract:Using the theory of oscillation,the authors studied the oscillation criteria for second order nonlinear functional different equations.Some new oscillation criteria for equations were obtained.These criteria have extended,improved and unified a number of
Abstract:With consideration of typical uncertainty of investment in auto products and normally huge investment involved in several stages during its product development,market development and expansion,this paper investigated the identification of investment decis
Abstract:According to The New Basel Capital Accord and VaR method recommended by the Basel Committee on Banking Supervision to determine the minimum capital,the basic framework for internal credit risk management suitable to commercial banks in China was investiga
Abstract:To achieve the goals of liquidity,safety and profitability,commercial banks use some strategies to deploy their capitals,The Aim Programming Method is an effective way.The modeling and research was based on the predicted data of 2004 in the EverBright Ban