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团簇,进而获得其尺寸和成分信息[7]；双球差矫正扫描透射电镜 (Double cs-corrected STEM)具有优于传统高分辨透射电镜(HRTEM)的空间分辨率,结合高角环形暗场(HAADF)探头,能够利用原子序数衬度(Z衬度)对材料中纳米级局部区域成分变化进行表征[8]；小角同步辐射X射线/中子散射(Small-angle scattering, SAS)借助高质量光源,能够在原位或离位条...他原子与近邻原子的最大距离L=0.5 nm,剥离距离derosion= 0.1nm. 使用Bruker D8 Advance X射线衍射仪对样品进行精扫.衍射仪光源为Cu Kα射线,其中的Kα2部分在使用Jade进行峰拟合时软件去除.2θ角度范围为30°~120°,步长为0.01°,每步停留时间0.2 s.仪器半峰宽化曲线使用标准刚玉(α-Al2O3)样品的XRD曲线绘制与拟合,并在后期数据处理时......
的单轴抗压强度与水泥砂浆块的单轴抗压强度的比值增大时,承压注浆加固试件的抗剪强度先增大后减小,说明注浆材料强度与含弱面岩体原有强度的比值处于某一值时,承压注浆加固后含弱面岩体的抗剪强度最大,将该比值定义为最优比值,可用来衡量注浆加固的效果.图中还显示,抗剪强度随比值x变化趋势的拟合公式为一元二次多项式,整理其表达式如下: (a1＜0,b1＞0,C1为常数) ... and mechanical characteristics of soft rock tunnel and the effect of excavation on supporting structure[J]. Applied Sciences-Basel, 2019, 9(8): 1-15. [8] 郑 卓, 刘人太, 李术才, 王晓晨, 张连震, 王洪波. 基于 Hoek-Brown 准则的岩体注浆加固机制研究......
about 16.0% in the platform and detention basin. Figure 3 Mineral composition characteristics of ∈1n organic-rich shale 3.3 Sedimentary facies correlation In the direction perpendicular to the structure..., which is deep and less affected by sea level change. In the north of the basin far away from the continent, biological deposition mainly develops, followed by vertical fine-grained sediments. Therefore......
focus on 1D rheological consolidation problem of single-layer soil. As is known to all, layered soil is another important feature of soil structure. Double-layered soil, as the simplest layered soil, its... [24-35] showed that the water flow in fine-grained soil may deviate from Darcy’s law under low hydraulic gradient. HANSBO [24] took the lead in calling this phenomenon as non-Darcian flow, and proposed......
] TURNBULL D. On the relation between crystallization rate and liquid structure [J]. The Journal of Physical Chemistry, 1962, 66: 609-613. [18] AZIZ M J, BOETTINGER W J. On the transition from short-range......
design of ECS of zinc electrolysis process[J]. Computer Applications, 1999, 19(4): 37-39. [39] SEBZALLI Y M, WANG X Z. Knowledge discovery from process operational data using PCA and fuzzy clustering[J...性催化还原烟气脱硝深度结构和深度控制[J]. 控制理论与应用, 2019, 36(1): 65-72. NIU Yu-guang, PAN Yan, CHEN Xi. Depth structure control and depth control of selective catalytic reduction flue gas denitration system[J]. Control......
性较弱,因此可将其理想化为横观各向同性体,研究其本构关系[18].在现场调研的基础上,以单元采空区为例,构建水平层状优势节理石灰岩顶板力学模型(见图1).其中,图1(a)所示为单元采空区结构图,图1(b)所示为顶板受力模型图.顶板上部受到上覆岩层重力q作用. 假设顶板两端简支,两侧受支持力Ft以及侧压力Fn.在图1(b)中,顶板厚度h,跨度为2l.坐标系原点位于顶板中心,水平方向为x轴方向,沿顶板...待定函数.将式(3)带入式(1),可得 (4) 式(4)为x的一元二次方程,因此需满足x的各项系数以及常数项为0,从而可求解得到,,表达式,进而推导出应力函数Ф的表达式: (5) 式中:A,B,C,D,E,F,G,H,K为待定常数；γ为上覆岩体平均容重；h0为顶板埋深. 由边界条件及侧压力计算方法[3],可以求得积分常数A~K的值,其中,,,,,,,. 侧压系数用k0表......
) The NARX neural networks are employed to calculate sub-series from the EWT method to forecast future solar radiation. The structure and principle of the NARX network are given in Section 2.4. 2.2 Ensemble...; (1) where x(n) is the input of the NRAX network, while y(n) is the output at time n; dy is the output delay and dx is the input delay. Namely, y(n+1) depends on dx past input values and dy past output......
is performed to verify the effectiveness of this method. 2 Experimental An intact marble block with a massive structure was collected from Hunan, China. The mineral types of the marble specimens include calcite (more than 95%), and other carbonate minerals including tremolite, plagioclase, quartz (less than 5%). The grain size of the marble ranges from 0.05 to 0.3 mm; hence, it is fine-grained......
明. 基于遗传算法的医药码垛机器人结构参数优化研究[J]. 机电工程, 2016, 33(11): 1289-1294, 1308. YU Tianbiao, QIAO Mu, LI Ming. Optimization of structure parameters of palletizing robot based on genetic algorithm in medicine[J......
