Abstract:This paper studied cable-stayed concrete filled steel tube arch bridge.Considering the nonlinear characteristics of concrete filled steel tube arch in both material and geometry in deformation and instability,the ultimate bearing capacity of a cable-staye

Abstract:The relationships between the input energy of elastic multi-degree-offreedom systems and that of equivalent single-degree-of-freedom systems were derived.Based on the energy responses of 3 frame tube structures to 12 ground motion records,a simple calcula

Abstract:The bearing capacity of discrete material pile composite foundation was discussed.On the basis of the Area-ratio Formula,a bearing capacity calculation method,which took into account the lateral deformation of discrete material pile under the vertical loa

Abstract:In order to overcome the drawbacks in linear combination forecasting modeling,the wavelet network method was applied to establish the optimal combination function for developing the nonlinear combination forecasting modeling of urban water consumption.By

Abstract:According to Reissner's moderate thick plate theory and Hu Hai-chang's decoupling function method,the trial function that satisfied all and every free boundary conditions was established,two generalized displacements were determined,and the analytic solut

Abstract:In order to meet the application requirement for low-power,low-voltage and real-time,this paper presented an analog implementation of wavelet transform using a balanced log-domain integrator with class AB.The circuits implementing wavelet transform were c

Abstract:The relationships among the torque,the speed,the specific fuel rates of the engine,and the throttle angle were studied on the basis of the engine performance test results.The back-propagation network(BP) and its design with the toolbox in the MATLAB were

Abstract:提出一种基于CMOS图像器件的超分辨率图像合成算法,该方法将4幅沿水平、垂直及对角线方向错位获取的CMOS图像重新组合,得到一幅重建的新图像.对重建图像的像素灰度进行了理论分析和计算,求出了重建超分辨率图像的算法.结果表明,在不提高CMOS工艺水平的条件下,该算法能将重建的CMOS图像的分辨率提高到原图像的2×2倍.实现了CMOS图像器件的超分辨率图像合成算法.对该算法进行了计算机仿真,结果同理论分析计算的结果完全一致,证明了所提出的CMOS图像器件超分辨率算法是正确的.

Abstract:采用一种基于开关电容阵列(SCA)和尾电流源处加入电感电容滤波相结合的电路结构,设计了一个1.8 GHz宽带分段线性压控振荡器.采用TSMC 0.18μm 1P6MCMOS RF工艺,利用Cadence SpectreRF完成对电路进行的仿真.结果显示,在电源电压VDD=1.8 V时,控制电压范围为0.6~1.8 V,频率的变化范围为1.43~2.13 GHz,达到39%,相位噪声为-131 dBc/Hz@1MHz,功耗为9.36 mW(1.8 V×5.2 mA).很好地解决了相位噪声与调谐范围之间的矛盾.

Abstract:Based on the extended Hanalay's inequality and the upper-right derivative,the global exponential stability for the second order Hopfield neural networks with time delays was investigated.Under the conditions that the parameter of the systems was a M-matri

Abstract:采用恒电流沉积方法,以0.2 mol/L CoSO4 1.5 mol/L H2SO4为电镀液,在阴极大电流密度下,以氢气泡为模板,在石墨基体上成功制备了CoOx.yH2O多孔薄膜.通过扫描电子显微镜、循环伏安法和恒电流充放电技术等对CoOx.yH2O多孔薄膜的形貌及超电容性能进行表征和研究,并对CoOx.yH2O多孔薄膜的沉积机理进行了探讨.结果表明:CoOx.yH2O薄膜呈纳米/亚微米级的多孔结构,随阴极电流密度的增加,薄膜的孔径增大;同时,膜层具有优异的充放电性能和功率特性,比电容达64.8 F·g-1,并具有良好的稳定性.

Abstract:The structure,water-resistant mechanism and physical mechanics properties of the gypsum based composite material(GBCM) were studied.The fracture mechanism of the fibre reinforced GBCM was analyzed by the curve of load-deform.The interfacial properties bet

Abstract:Based on the Timoshenko-Mindlin hypothesis and the Hamilton Principle, a set of governing equations of motion for the laminated non-circular cylindrical thick shells were founded.Using the Galerkin procedure,the Mathieu equation only with time variable wa

Abstract:通过核磁氢谱法研究酚类化合物与4,4'-联吡啶季铵盐π-π叠加作用,研究了吡啶环上α-H,β-H及氧乙基上的α'-H,β'-H的化学位移值及其改变的情况.结果表明,β-萘酚、α-萘酚、对苯二酚、间苯二酚及苯酚使上述氢的化学位移降低,其化学位移降低次序为:β萘酚＞α-萘酚＞对苯二酚、间苯二酚》苯酚.而8-羟基喹啉和间硝基苯酚导致上述氢的化学位移稍升高.

Abstract:Polyurethane-modified epoxy resin dispersion was made through the reaction of polyether chains and carboxylic groups onto the backbone of epoxy resin molecules,neutralizing,then dispersing.The influences of OH/NCO ratio,polyether diols content,carboxylic

Abstract:Several typical text classification algorithms were analyzed,and the performance of different algorithms was evaluated synthetically according to Chinese and English text database.Experimental results show some significant conclusions: firstly,support vec

Abstract:Based on sub-image feature combination,a feature extraction method of face image was proposed.Combined with BP neural network,a face recognition model was presented.In the model,face images were divided into sub-images firstly,then the discrete cosine tra

Abstract:An active learning was used in text information extraction for training text,which was partly labeled.And an approach of text information extraction based on active hidden Markov model was proposed.In this approach,only the most valuable training text for

Abstract:This paper put forward the ortho-symmetric problem based on the constrained matrix equation.We derived the relation between orthogonal-symmetric matrix and symmetric matrix.Using the canonical correlations decomposition(CCD) of matrix pairs,we obtained th

Abstract:We described a nonoverlapping additive domain decomposition method based on Robin transmission conditions for a Neumann model problem.The method was described for the cases of differential form and the mixed finite element discretization form with variabl

Abstract:By applying the Price turnover incline model,this paper analyzed the relation between organizational commitment and turnover behavior.We proposed a conceptual model of employee's organizational commitment's influence on turnover behavior.Firstly,the use o

Abstract:This paper established an improved optimization model of distribution vehicle scheduling based on Stranger Problem,which the common vehicle scheduling model does not consider,by defining two parameters named "Strange Degree" and "Strange Coefficient".In t