针对地铁盾构隧道专用预埋槽道技术问题,运用有限元软件ABAQUS,对现有6种型号带齿预埋槽道进行仿真,分析轴拉、剪切静力荷载作用下预埋锚杆、锁紧螺杆、槽道等主要部件的力学性能。结果表明:在轴拉荷载作用下,仅最大型号槽道的应力小于限值,其余型号槽道的应力均大于限值;仅最小型号预埋槽道的混凝土压应力大于限值,其余型号预埋槽道的混凝土压应力均小于限值;在横向剪切荷载以及轴拉与纵横向剪切荷载共同作用下,6种型号槽道的应力均大于限值。
The Himalayas hailed as the 'water towers of the world'feed many perennial rivers which form the lifeline of the Indian sub-continent.Climate change induced ris
Check-dams are the most important measure to control the soil and water loss in highly erodible catchments on the Chinese Loess Plateau.Based on the data of che
为了提高变压器绕组故障诊断准确率,减少不同故障类型的诊断时间,提出基于贝叶斯分类的变压器绕组故障诊断模型;根据平行板电容理论,计算电容器极板上所带电量,利用电场分布和电场能量,计算导体间的互电容之和,将绕组电感和电阻确定为贝叶斯诊断模型的故障特征量;利用后验概率决策分类,通过欧拉非线性理论模型离散获得五阶故障模型,构建故障模型的输出方程,完成基于贝叶斯分类的变压器绕组故障诊断。结果表明,该方法的故障诊断准确率可高达96%,针对不同的故障类型诊断的实时性较好。
China-Pakistan Economic Corridor(CPEC)is a framework of regional connectivity,which will not only benefit China and Pakistan but will have positive impact on Ir
The Digital Elevation Model (DEM) data of debris flow prevention engineering are the boundary of a debris flow prevention simulation,which provides accurate and
在V2V环境下,驾驶员可以直接获取邻接车辆的运动状态和交叉口的信号时长,利用和前车之间的车头间距与安全距离差对车辆进行预加速控制,对驾驶行为产生积极影响。本研究基于V2V环境考虑驾驶员反应提前时间的改进OV模型,选取交叉口排队消散效率和直行车道的通行能力作为分析信号交叉口通行效率的指标,研究了考虑驾驶员反应提前时间的改进OV模型对信号交叉口通行效率的影响。仿真结果表明,相比传统OV模型和考虑驾驶员反应延迟时间的OV模型,基于V2V环境改进的OV模型在交叉口处能获得更高的消散效率和直行车道的通行能力,极大提
本文旨在研究1型糖尿病(type 1 diabetes mellitus,T1DM)小鼠前额叶皮层小胶质细胞的激活情况以及与神经退行性疾病相关的小胶质细胞新亚型(disease-associated microglia,DA
Steps are distinctive features for estimating the movement of the upper and lower block of faults.However,studies about the influence of steps as a special type of discontinuity on cracking behaviors and strength of rock masses are limited.In this researc
转录因子X盒结合蛋白1 (X-box binding protein-1,XBP1)在未折叠蛋白反应中起关键作用.本研究旨在分析XBP1在小鼠早期妊娠过程中的表达和调节,探讨其与胚胎着床的相关性.分别