Abstract:This paper analyzed the eigenvalue buckling and nonlinear buckling of cable stayed arch structure by establishing a two-dimensional finite element model.Firstly,the effects of cables on the instability behavior in the plane of hybrid structure were invest

Abstract:In order to reduce the seismic force of the towers,the seismic isolation system is commonly adopted in super-long-span suspension bridges.But in this system,the seismic displacement at the end of the main girder may exceed the allowance,so suitable device

Abstract:Based on the experimental study of Steel Fiber High Strength Concrete(SFHSC) pure torsional thin-walled box girder and corresponding nonlinear analysis program in which the space softening truss theory with constitutive laws and softened coefficient equat

Abstract:In order to obtain the distribution of load,displacement and wind vibration coefficient of large-span spatial steel pipe truss structures under wind load,a program based on Auto-Regressive method was worked out to simulate its time history curve of wind s

Abstract:To discuss the behavior of initial post-buckling of cast-in-situ rock-socketed piles widely used in bridge engineering,the total potential energy equation of the pile-soil system was first obtained from the simplified beam model on elastic foundation and

Abstract:The indoor air movement of a common bedroom with different room air conditioner modes was predicted through Computational Fluid Dynamics(CFD) method in summer and winter.Three room air-conditioner modes were adopted and studied,including a new window-type

Abstract:The casting explosive TNT process of shocking to detonation was analysed by using the Lagrange analysis method,and the explosive and products state equations were all based on(JWL) state equations.The process of u,e,v on every Lagrange position was obtain

Abstract:This paper studied,the influence of the total length and shorter diameter of the tapered end of the circular cross-sectional metal thin-walled component on the crashworthiness,where the Specific Energy Absorption(SEA) was taken as the objective function b

Abstract:According to the weak study to load modeling of component-based modeling approach,this paper put forward a kind of classification-the fuzzy C means value clustering,which was based on investigation and research of the large range of Hunan province electri

Abstract:This paper presented a new disk-type PM synchronous generator,and analysed its principle and electromagnetism design.An electromagnetism design software of the disk-type PM synchronous generator,which was based on database management system,was developed.

Abstract:This paper studied the design of decentralized robust stabilization controller for large-scale uncertain time delay systems by means of linear matrix inequality(LMI) approach.The uncertainties are value bounded and may not satisfy the so-called matching c

Abstract:This paper put emphasis on the hardware design of active power filter.It described the nuclear device of the control system based on TMS320LF2407 Digitd Signal Process(DSP) for active power filter.The DSP control system was composed of cycle sampling sign

Abstract:This study investigated the design of the simulation software for in-cylinder process of internal combustion engine.First,The multi-dimensional model was constructed by integrating such sub-models as spray,combustion,soot,etc.into the model of in-cylinder

Abstract:As the shape of automobile's covering parts is very complex and it is difficult to estimate the formality by means of experience,the firite element(FE) numerical simulation method was proposed to forecast the drawing formality of the inside door.The optim

Abstract:A quasi-sliding mode variable structure control(QSMVSC) based on fuzzy scheduling boundary was developed and applied to the positioning control of a hydraulic servo system.A two-dimension fuzzy scheduling mechanism was designed. The boundary width of slid

Abstract:The dynamic visualization facility of the engine in the combustion process was based on the technology of laser high-speed photography.The facility was mainly composed of optical-engine,light-path system,data collection and signal synchronization control

Abstract:在Gleeble-1500热模拟机上对Mg-Al-Zn系合金(AZ31和AZ80)的高温压缩流变应力行为进行研究.结果表明:材料真应力-应变曲线呈现动态再结晶特征.合金元素含量差异引起材料高温变形行为不同.AZ31合金流变应力行为受变形温度影响:变形温度低于350℃时呈幂指数关系;高于350℃时呈指数关系,应力指数n为7,热变形激活能Q为112 kJ/mol.AZ80合金高温流变应力符合幂指数关系,应力指数n为6,热变形激活能Q为220 kJ/mol.

Abstract:By applying the wet technique of particle modification,silane coupling agent was grafted on the surface of nano-silica.The effects of reaction processing parameter on the graft ratio and its dispersion stability in the in suit emulsion polymerization were

Abstract:The geometrical and electronic structures of NiAl supercells were calculated by the first-principle pseudopotential plane wave methods based on the density fuctional theory.Several mechanical parameters were used to characterize and assess the alloying ef

Abstract:Using the plane-waves method,the elastic wave frequency band structure of phononic crystal,which consists of Pb cylinders embeded in epoxy with periodic array,was investigated,and at the same time the scattering cross section of elastic waves in this two

Abstract:Three kinds of nanoparticles were synthesized to encapsulate botanical extracts GRO by using soya lecithin,poly(DL-lactide-co-glycolide)(PLGA) and poly(ethylene glycol)(PEG) as the carriers.The morphology,Zeta potential,entrapment efficiency,and physical

Abstract:The voltammetric behavior of living cells of Escherichia coli was studied.The peak current was positive with the viability of Escherichia coli.The growth curve obtained by voltammetric method was very similar to that by conventional cell counting method.T

Abstract:通过监测反应体系的胺值变化,对Zn(OAc)2催化剂作用下,碳酸二甲酯胺解合成六亚甲基二氨基甲酸甲酯反应动力学进行了研究.结果表明:反应级数对1,6-己二胺(HDA)为准一级;反应活化能为18.58 kJ/mol;反应速率常数在温度343 K,353 K,363 K,373 K时分别为1.995×10-1h-1,2.513×10-1h-1,3.044×10-1h-1,3.334×10-1h-1,并与催化剂浓度成正比.提出了可能的催化反应机理,导出的速率方程圆满地解释了实验现象.

Abstract:A new process of direct electroplating on magnesium alloys was studied.Nickel alloy coated with good adhesion and corrosion resistance could be electrodeposited on magnesium alloy with preliminary electroplating nickel using pulse current,followed by elec

Abstract:The nonlinear propagation of an ultrashort optical pulse in a birefringent photonic crystal fiber was investigated numerically using the coupled nonlinear Schro dnger equations.It was found that the phenomenon of pulse trapping occurred when the polarized

Abstract:We discussed and analyzed the Variable Step-Size Adaptive Algorithm(VSSLMS),in which the descent of its convergence speed led to the reduction of performance when the input signals were heavily correlated.As a result,we proposed a modified uncorrelated LM

Abstract:This paper provided the prototype of a non-router Transmission Control Protocol(TCP) stack compliant with RFC 1122,designed the TCP stack on an embedded system and provided several shortened TCP improvement techniques,including Header Prelibation and Simp

Abstract:This paper studied asymptotic behaviors of solutions of two thresholds neural networks with McCulloch-Pitts nonlinearity.We analyzed systematically the asymptotic behaviors of solutions in the different thresholds cases.In particular,some new necessary an

Abstract:We discussed the pricing of European contingent claim in Multi-dimensional Fractional Black-Schloes model with arbitrary Hurst parameter.First,we obtained the fractional risk neutral pricing formula of contingent claim at arbitrary time before the expirat

Abstract:给出了一个带有射电5 GHz和γ射线辐射流量密度的含有94个γ噪Blazar的大样本,其中有66个FSRQs,20个BL Lac天体,利用该样本研究了射电5 GHz和γ射线流量最大值,最小值以及平均值之间的辐射相关.结果表明:γ射线流量最大值和平均值与射电5GHz辐射有较强的相关,最大相关系数r=0.651,置信度均好于10-4;γ射线流量最小值与射电辐射之间没有相关;3C273辐射的最大值不是爆发态时的观测值,若令γ射线谱指数αG=1.0,则3C273的最大辐射流量为(450.8±39.4)×10-8photon.cm-2.s-1.因此,Blazar的γ射线辐射与低频射电辐射确有关联,γ射线的辐射应来自同步加速自康普顿辐射过程.

Abstract:According to the connotation of green supply chain and the standards of environmental management,this paper designs green partner selecting measurement systems composed of some main factors such as green message. And the authors study deeply these factors