Abstract:Based on the assumption of rigid slab,and regarding the displacements in x and y and the rotation by z in each floor's mass center as DOFs,the asymmetric frame structure was simplified as the rigid-body-string model.The space frame was divided into some p
ZHAO Ming-hua , HE Wei , ZOU Xin-jun
Abstract:The behavior of the side resistances was discussed,and based upon the hyperbola model,the differential equation was established in the load transfer method.Considering the character of the layered stratum and pile-soil interaction,the exact solution was o
XIA Xin-hong , SHEN Pu-sheng , GONG Hu-guang , FAN Hui
Abstract:An improved multi-mode pushover analysis,which combines the advantage of the modal pushover analysis(MPA) and the adaptive pushover analysis(APA),has been proposed.In the multi-mode pushover analysis procedure,the multiple degree-of-freedom(MDOF) system c
Abstract:Inelastic time-history analysis was performed on a single-story asymmetric structure with three lateral force-resisting elements.The relationship of torsional response and the peak ground motion acceleration(PGA) were studied.The results showed that at th
LIU Gui-qiu , SHI Chu-xian , HUANG Liang
Abstract:Analysis and comparison have been made on the failure criteria of masonry in compression-shear at home and abroad,and their shortcomings have been pointed out.The failure criteria of masonry in compression-shear have been established on the basis of mecha
WANG Jian-hui , FANG Qi-hong , CHENG Zheng-qing
Abstract:The elastic interaction between a wedge disclination dipole and an interfacial crack was investigated.The closed form solutions of complex potentials and stress fields to this problem were presented by using complex potential theory.The stress intensity f
LIU Meng-xiang , ZHONG Zhi-hua , GONG Jin-ke
Abstract:In order to improve the efficiency of vehicle engine,a data acquisition system of the cylinder pressure in vehicle engine could be gotten when a fitting formula about cylinder pressure based on different signal of crank speed was established by using func
Abstract:The demerit of the classical branch-cut phase unwrapping method was in the condition of the branch-cut of residues distributing denseness.An improved method of branch-cut phase unwrapping based on mapping was proposed in order to spend less time in calcul
ZHOU Hai-yin , LI Dong-hui , JIANG Yue-ping
Abstract:High-precision determining the aerocraft position involves multi-sensors information fusion.The powers of all information in the fusion processing are very important to the precision of the fusion processing results.By virtue of power factors,the estimate
WANG Zhen-dao , ZHANG Jing , ZHANG Ying-Jie , LI Xue-jun
Abstract:After the analysis of the updating condition for index table and probability interval,an optimized algorithm based on partial parallel scheme was presented for arithmetic encoder(AE) in JPEG2000.Based on the prediction of probability interval,the index ta
YANG Lei , TANG Yuan-hong , CHEN Xiao-hua , PENG Kun , HU Ai-ping , WANG Qian , ZHANG Wei
Abstract:用超声的方法在水和正庚烷的微乳液中成功地合成了ZnS的微米球,并用XRD,TEM对微米球进行了表征.合成的产物为纯的多晶ZnS,微米球的直径约为2μm,为规则的球形,粒径分布窄,分散均匀,表面光滑.荧光光谱上ZnS微米球在456 nm处有一个发射主峰,在492 nm处有一个小峰.这两个发光峰报道不多.它对应于ZnS的缺陷发光.
XIA Xin-nian , XU Wei-jian , XIONG Yuan-qin , ZHANG Xiao-hua
Abstract:以N-(4-羟基苯基)马来酰亚胺为改性剂,合成了一系列不同马来酰亚胺含量的酚醛树脂(PMF),并以此作为一种新型的环氧固化剂对环氧树脂的热性能和阻燃性能进行改性研究.固化物的热性能研究发现由于马来酰亚胺结构的引入,固化物的初始热分解温度(380℃)和残炭率(700℃,48.6%)都有较大的提高.固化物的阻燃性能测试表明HPM的引入可有效地提高环氧固化物的阻燃性能.
JIAN Zhi-jian , PENG Jing-cui , ZHANG Gao-ming
Abstract:A photonic crystal with defects will appear some localized modes in photonic frequency gap,and the linear defects will cause the formation of a waveguide with high transmission efficiency.The photonic band structure and the density of the state of a two-d
CHEN Di-ping , HUANG Gui-fang , ZENG Yun , WANG Zhen-dao , XIONG Qi
Abstract:通过丝束电极测试电阻分布,研究了水基防锈液的防锈性能.测试结果表明,水基防锈液的电阻分布在一定范围,相邻区域的电阻存在差异.表明水基防锈液对金属的防锈性能存在一定的不均匀性.根据丝束电极的电阻分布可判别防锈液的防锈能力:在较低阻区出现的电极数越多,则防锈液防护金属的能力越弱,反之则越强.丝束电极评价防锈液的防锈性能结果和经典试验结果有较好的对应性,且具有所需时间短,结果定量的优势.丝束电极电化学法为快速、准确判别防锈液防锈性能提供了一种新型的方法.
PAN Jian-gao , ZHANG Zun-ying , XIANG Li , LONG Bo-hua , DUAN Jun-fei , CHEN Jing , XIANG Jian-nan
Abstract:用二正丁基氧化锡和类维生素A酸以摩尔比1∶2和1∶1反应,合成了两个系列的新型类维生素A酸二正丁基锡酯化合物3a~3d和4a~4d,并利用(1H,13C,119Sn)NMR和IR表征了这些化合物的结构,确定了化合物3a~3d是通过单齿配位形式与锡原子结合而成的五配位三角双锥型的配合物化合物,而化合物4a~4d的结构中存在着一个锡氧四元环,分子中的酯基为二齿配体,锡原子都是六配位扭曲八面体构型.生物活性测试表明:该类化合物对宫颈癌细胞(Hela)、肝癌细胞(LCC)、肺癌细胞(A549)等癌细胞都具有较好的抗癌活性.
ZHANG Xin-ya , FU He-qin , HUANG Hong , SHEN Hui-fang , CHEN Huan-qin
Abstract:Pure poly(acrylate) latexes were prepared under various conditions of the nonionic surfactant amount and its Ethylene Oxide(EO) chain length.The influence of the nonionic surfactant amount and the EO chain length on the latexes properties,such as the emul
ZHANG Han-ling , ZHANG Xiao-yan , LI Li-jun
Abstract:Statistical analysis based on complexity histogram is a powerful steganalytic technique for detecting the presence of secret message embedded in the digital images using Bit-Plane Complexity Segmentation(BPCS).Therefore to improve steganographic security,
LI Wen-wei , ZHANG Da-fang , ZENG Bin , XIE Gao-gang
Abstract:By means of queuing analysis and network simulation,the measurability of end-to-end minimum packet delay has been quantificationally analyzed,and it was found that 50 packets was more than enough to measure the minimum delay of a 10 hops long path with ve
Abstract:We study an inexact alternating direction method for solving a class of asymmetric monotone variational inequalities.We improve the alternating direction method to allow inexact solutions of the sub-problem(the system of nonlinear equations) in each itera
Abstract:This paper studied the center conditions at the equator for a class of cubic polynomial system with no singular point at the infinity.By converting the real planar system into the complex system,the recursion formula for the computation of singular point
Abstract:Using the data of logistics development and investment of fixed assets,GDP from 1980 to 2005,this paper analyzed their relation with Cointegration test and Granger-causality test.The result indicated that there was a longterm equilibrium among them,and Ch
LIN Zheng-long , YANG Zhao-jun , LI Shu-cheng , LI Lin
Abstract:We assumed utility was exponential and the value of a project followed a lognormal process with upper barrier under an incomplete market. We dealt with problems of the timing and valuation of the project.By making use of stochastic theory and a new verifi