共搜索到2266条信息，每页显示10条信息，共227页。用时：0小时0分0秒882毫秒
; Abstract: Based on the physical meaning of sensitivity, a new finite element(FE) model updating method was proposed. In this method, a three-dimensional FE model of the Nanjing Yangtze River Bridge(NYRB...; structural health monitoring; condition assessment; sensitivity ......
engineering. In this study, the effect of environmental factors, such as moisture and temperature, on the strain-rate sensitivity of concrete mixtures was systematically investigated. The strain rate varied from 10-5s-1 to 10-2s-1. From the investigation it was concluded that moisture content had a significant influence on the strain-rate sensitivity of concrete. With regard to concrete with low moisture......
) of training, testing and validating data achieve 0.999 1, 0.996 4 and 0.998 1, respectively. Sensitivity analysis shows that the highest and lowest effects on the gold dissolution rise from time and pH, respectively. It is verified that the predicted values of ANN coincide well with the experimental results. Key words: artificial neural network; gold; cyanidation; modeling; sensitivity analysis 1......
of equilibrium phase is meaningful, and at higher temperature, decreasing the cooling rate is helpful to relieve the effect of thermal load. Key words: 7050 aluminum alloy; TTP curve; quench sensitivity ... that the supersaturated solid solution decomposites and particles precipitate during quench process, the precipitation rate is the highest at about 330 ℃. A number of coarse equilibrium η particles precipitate at grain......
致. 关键词:拉索；温度变化；索力；频率；敏感性 中图分类号:U443.38 文献标志码:A 文章编号:1672-7207(2014)05-1680-06 Sensitivity... 410082, China; 2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082, China) Abstract: In order to study the sensitivity of different tension forces of cables......
Highway Consultants Co., Ltd. Xi’an 710075, China)Abstract:The main objective of this work is to propose new mixture response parameters and to compare correlations with rut depths and sensitivity... coefficients with rut depths and coefficients of variation (sensitivity) are compared between the four new and two existing parameters. Some parameters are recommended to be used for the newly......
参数. 图2 灵敏度系数图 Fig. 2 Diagram of sensitivity coefficients 2 仿真模拟研究 在上述热导率测量及估算方法的基础上建立数学模型,采用Fluent进行数值模拟得到温度场分布及监测点温度,根据测量方法的原理选取不同的热线半径,测点位置,加热功率及试样半径,得到不同参数对热导率结果的影响规律. 2.1 控制方程 采用焓-孔隙率方法来模拟......
Sensitivity analysis and influence of mechanical parameters on shear strength of unsaturated soil slopeLIU Zi-zhen1, 2, 3, YAN Zhi-xin1, 2, LING Song-yao4, REN Zhi-hua1, 2, DUAN Jian1, 2(1. Key... parameters on safety factor was analyzed by calculating sensitivity. The calculation results show that the linear relationship can be obtained between safety factor and soil parameters. And the most......
is very noticeable if the deformation is performed in these sensitivity domains. In Fig. 5(c), it is seen that the absolute derivative of globularized fraction with respect to lg(strain rate) decreases... at a deformation temperature of 1083 K, a strain rate of 0.01 s-1 and a strain of 1.2. The globularized fraction decreases with increasing strain rate because lower strain rate provides enough time......
through 209 sets of rock burst samples from underground rock projects. The sensitivity of indicators is analyzed and 209 sets of rock burst samples are discriminated by this model. The discriminant results of the entropy-cloud model are compared with those of Bayes, KNN and RF methods. The results show that the sensitivity order of those factors from high to low is sq /sc, sq, Wet, sc/st, st , sc......
