Results 111 to 120 of about 18,231 (303)

Electronics and control technology [PDF]

, 1997
Until recently, there was no requirement to learn electronics and control technology in the New Zealand school curriculum. Apart from isolated pockets of teaching based on the enthusiasm of individual teachers, there is very little direct learning of ...
Forret, Michael
core   +1 more source

A novel construction approach for the pore structure model principally focuses on the controllable roundness of rock particles

Deep Underground Science and Engineering, EarlyView.
Particle rounding effects comparison of different methods: (a), (b), and (c) are the rounding results using the B‐spline curve method with different R; (d), (e), and (f) are the results of vertex rounding substitution method with different rounding radii.
Jiabin Dong, Ning Yang, Yi Jin, Ying Wu, Dandan Liu, Junling Zheng, Jingyan Zhao   +6 more
wiley   +1 more source

Study on the failure mechanism of the shield excavation face in the sandy cobble stratum under different buried depths

Deep Underground Science and Engineering, EarlyView.
Abstract One of the significant challenges faced in shield tunnel construction is the risk of collapse resulting from abrupt changes in soil conditions in advance of the working face, particularly within the sandy cobble stratum. This study aims to effectively manage these sudden variations and to further investigate the failure mechanisms associated ...
Hua Jiang, Chongyang Liu, Ao Zhang, Xiaoyan Zhang, Yuhang Li   +4 more
wiley   +1 more source

Soil arching effect analysis and structure optimization of a robot foot sinking in soft soil

Advances in Mechanical Engineering, 2017
In this study, to analyze the influence of the cross-sectional shape of a rigid foot on its sinking performance in soft soil, a numerical model of the subsidence of a single leg was built using the arbitrary Lagrangian–Eulerian method in ABAQUS to ...
Gang He, Jiawei Xu, Jun Jiang, Zhaoyuan Cao, Denglin Zhu   +4 more
doaj   +1 more source

Investigation of the failure characteristics of fissure tunnels under dynamic and static combinations

Deep Underground Science and Engineering, EarlyView.
This article aims to investigate the dynamic fracture response of fractured tunnel models under zero geological stress through physical experiments and numerical simulations. It further simulates the dynamic fracture characteristics of fractured tunnel models under geological stress ranging from 0 to 2.5 MPa using the numerical software AUTODYN ...
Peng Ying, Yu Ying, Xiaohan Li, Han Zhao, Kewei Yu, Zheming Zhu, Lei Zhou, Xibin Li   +7 more
wiley   +1 more source

Seepage-induced sand-leakage karst collapse mechanism considering the soil arching effect

Shuiwen dizhi gongcheng dizhi
Sand-leakage karst collapse often occurs in the hidden karst area of the binary structure covering layer due to seepage. However, further research is needed to understand the macro and micro mechanical mechanisms of such collapse and the mechanical ...
Xu GAO, Shi WU, Echuan YAN, Qihua XIONG, Nuo CHEN   +4 more
doaj   +1 more source

Effect of the curing time on the numerical modelling of the behaviour of a chemically stabilised soft soil [PDF]

, 2017
The ability of the Modified Cam Clay (MCC) model combined with the Von Mises (VM) model, considering the effect of curing time on the enhancement of the mechanical properties of a chemically stabilised soft soil is examined. The evolution of the strength
Correia, Antonio A. S., Lemos, Luis J. L., Oliveira, Paulo J. Venda   +2 more
core  

Random finite element analysis on ground subsidence caused by tunnel excavation in karst regions with spatial variable soil

Deep Underground Science and Engineering, EarlyView.
This study investigates ground subsidence during tunnel excavation in karst areas, highlighting the combined effects of karst cave proximity, cave size, and soil spatial variability. Findings suggest that shorter cave distances and larger cave sizes increase subsidence variability, and a modified Peck formula is proposed for more accurate subsidence ...
Zhenghong Su, Yong Fu, Miaomiao Sun, Kailin Ding, Ying Zhao   +4 more
wiley   +1 more source

Insulator fault feature extraction system of substation equipment based on machine vision

IET Networks, EarlyView., 2022
Abstract The artificial intelligence technology and intelligent automation are more and more widely used, the insulators play a supporting and insulating role in the operation of the grid. The use of machine vision inspection technology to detect insulator faults has become an inevitable trend of the times.
Keruo Jiang, Qiaoqun Xia, Lijun Ma, Xin Xu, Zhipeng Shao   +4 more
wiley   +1 more source

Lateral behavior of high-speed railway bridge pile foundation in soft soils under adjacent surcharge loads considering time-dependent characteristics

Alexandria Engineering Journal
The adjacent surcharge caused by improper soil dumping and irregular backfilling poses a huge threat to the safe service of high-speed railway bridge pile foundations in soft soils.
Shuanglong Li, Zhiping Deng, Limin Wei, Qiaoxiong Chen, Yang Zhang, Feifei He   +5 more
doaj   +1 more source