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, scholars found that it is difficult to predict the mechanical behaviors of the bimrocks based on a single parameter due to their complex components. Multi-regression model, therefore, has been widely used... parameters for the prediction of the mechanical properties of the bimrocks. Other than adopting the traditional simple regression and multi-regression analyses, a new prediction model based......
are based on the experimental investigations. For example, some researchers [8-27] have performed fracture tests on the different laboratory specimens such as single edge notched beam (SENB), disc... effective and powerful. Numerical investigations of cracked parts based on the fracture mechanics theory have been well established and employed by many researchers to study the crack growth behavior......
] studied the optimal filling level in the drums with different types of rectangular baffles based on image analysis technology. The study of LI et al [21] showed that when the ratio of the tip length...; (6) where ki is the weighting of sample cell i; Ni is the equivalent number of particles in the sample cell i; and Nt is the total equivalent number of particles in all......
in this study. The analysis is based on the first and second laws of thermodynamics. For the simplicity of the mathematical model, some assumptions have been made as follows: 1) The system is working... of the process streams. An optimization program based on a genetic algorithm is developed in the optimization calculation in Sections 4.1 and 4.3. 4 Results and discussion 4.1 Comparative analysis......
of the sheet material at different rates of loading conditions. However, the effect of pre-strain on the forming behavior of the material during shock- wave based deformation has not been studied... of 1-40 kHz, which is sufficient to capture the strain signal developed due to shock loading using an oscilloscope. The strain response has been captured thrice for a single set of the experiment in order......
and modified sepiolite were identified by XRD (Scanting GLP-10195/07-S, Japan). The powder samples were scanned in the 2θ range of 5°-80° using a Ni-filtered Cu Kα radiation source at 40 kV and 150 mA. FTIR... for the orthorhombic unitcell of sepiolite based on comparison with the standard pattern of sepiolite (JCPDS card No. 13-0595) [20,21]. The peak at 2θ value of 10.8° might be assigned to the (210......
尾矿样品粒级分布图 Fig. 3 Particle size distribution of tailings samples 2.2 测量程序 本次实验采用CSR与CSS两种测量模式. 1) CSR模式:控制转子施加的转速Ni由0逐步递增,记录扭矩Ti;使用3种不同转速递增速率,分析转速Ni递增幅度对流动曲线的影响,测量程序与实验参数如表1所示. 表1 CSR模式相应测量程序与实验参数 Table 1 Measurement procedures and experimental parameters for CSR model 2) CSS模式:控制转子施加的扭矩Ti由0逐步递增,记录转速Ni;使用6种不同扭矩递增速率,分析扭矩Ti递增幅度对流动曲线的影响.68%,70%,72%全尾砂膏体,其上限扭矩Tmax分别为4,7和......
Trans. Nonferrous Met. Soc. China 30(2020) 1707-1716 Prediction of metal futures price volatility and empirical analysis based on symbolic time series of high-frequency Dan WU1,2, Jian-bai HUANG1,2... February 2020; accepted 25 May 2020 Abstract: The metal futures price fluctuation prediction model was constructed based on symbolic high-frequency time series using high-frequency data on the Shanghai......
范围 Fig. 11 Influencing range of single hole injection and group hole injection near exploration hole H1 勘探孔附近同深度各取样点稀土浸取率和氨氮残留量波动较大,分析其原因可能是注液和淋洗过程同深度溶液分布不均.桂勇等[26]假设注液孔底以上孔周湿润部分为椭球状,孔周溶液入渗与孔底溶液... with column leaching experiment determined based on Green-Ampt model[J]. The Chinese Journal of Nonferrous Metals, 2016, 26(12): 2668-2675. [15] FENG X J, TAO T, ZHUY C. Transport kinetics of pollutants......
require more preeminent PM materials. Iron-based parts are still the main PM products due to their mechanical performance and low cost. MIM will occupy the growing market of highly flexible and complex... steel component due to less energy consumption by PM, and the Cr-containing PM material is advantageous compared to the Ni-containing one. During the past decades, the PM technology has made obvious......