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="on">(IPN) grouting material was prepared. The effects of n(-NCO)/n(-OH) ratio of polyurethane prepolymer and its dosage on the grouting materials properties were studied as well...>: 58-62. LI Xiao, XU Lingling, DENG Min. Synthesis and properties of MMA-based repair material for concrete[J]. Journal of Nanjing University of Technology: Natural Science Edition, 2004, 26
in copper smelting system[C]// First International Conference on Processing Materials for Properties. TMS, 1993. [28] WANG Qin-meng, GUO Xue-yi, WANG Song-song, LIAO Li-le, TIAN Qing-hua. Multiphase...: The distribution behavior of precious metals in high-temperature molten is affected by the thermodynamic properties of smelting systems and components. The capture of precious metals by high-temperature......
mineralization method could be an ideal kind of bio-nano-magnetic material[1-3], because of its specific properties such as superior crystalline, good biocompatibility, uniform nano-size, non... the expressions of mpsA, magA and mamB were related to Fe2+, the responses of mpsA, magA and mamB gene to different concentrations of Fe2+ stress were also analyzed. In contrast to steady-state or single......
interfaces exist among particles and pores remain in the matrix, which indicates that the sintering process is still not complete under 0.5 MPa. Under this pressure, since the shearing stress working... disappear and the pores reduce remarkably, as shown in Fig.1(b). Under this higher pressure, the shearing stress outweighs the material’s yield strength and then plastic flow of metal elements in the matrix......
in terms of the dynamic moduli[1-2] or tensile normal force[3], the induction times in terms of the level-upturn transition of the shear stress[4-5] or compressive normal force[6] can be measured...-amplitude oscillatory shear experiment, the gap of 0.75 mm, shear stress of 50 Pa, and angular frequency of 1 rad/s were chosen, and the change of storage modulus and dynamic complex viscosity was used......
(BP算法),通过最小化误差函数实现参数的学习,并优化模型结构参数. 3 结果与讨论 图2所示为Ti40合金在900 ℃不同应变速率时的 图2 Ti40合金在900 ℃时的高温压缩变形真应力-真应变曲线 Fig.2 True stress-true strain curves of Ti40 alloy during high temperature...为. 表2 Ti40合金流动应力的实验值与模糊神经网络(FNN)计算值的对比(ε=0.5) Table 2 Comparison experimental results with calculated values by flow stress of fuzzy-neural network for Ti40 alloy (ε=0.5) 图4 预......
by a three- dimensional locomotive dynamic model, which takes the nonlinear properties into account. Figure 1 Structure of three-axle bogie in heavy-haul locomotive: 2 Equilibrium equation of locomotive...-rail lateral force, longitudinal force, wheel- rail friction power and wheel-rail contact stress, which are selected as the assessment indices. Figure 11 Influence of braking torque on wheelset......
with small bending radii. The key to realize stable and precise bending forming is to select sound process parameters in order to control the stress and strain states, and thus the degrees of ovalization..., and the stress and strain distribution, tube wall thinning, cross section ovalization and other defects in the NC bending have been studied[3-16]. However, there have not been sufficient studies......
; 1 Introduction The properties of aluminum, chiefly high strength and light mass, make... it. With applied stress, the mobile dislocations then have to break away from the atmospheres and continue their motion. Therefore, the repetition of the interaction between the mobile dislocations......
西线高速公路十二标现场所用的红砂岩,其主要物理力学性性能如表3所示.填筑时,保证红砂岩填筑时的压实率达到95%以上. 表3 红砂岩的主要物理性能指标 Table 3 Index properties of red sandstone 在进行动力特性参数测量时,在第1层,第3层和第5层墙顶面板上分别布置941B型拾震器(1个水平,1个竖向),用DASP数据采集系统对... and displacement response of HACHI_EW earthquake wave 表6 ELCE_NS地震波的动应力响应峰值 Table 6 Peaks of dynamic stress response of ELCE_NS earthquake wave 表7 HACHI_EW地震波的动应力响应峰值 Table 7 Peaks......