Results 161 to 170 of about 82,459 (305)

Obstacle-avoidance trajectory planning method for excavators in confined spaces based on improved RRT* algorithm. [PDF]

Sci Rep
Fu S, Lin C, Yao Z, Lin T, Chen Q.
europepmc   +1 more source

An extension of the Dewey decimal system of classification applied to the engineering industries [PDF]

, 1912
Breckenridge, Lester Paige, Goodenough, George Alfred   +1 more
core  

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Research on multi-cylinder coordinated coupling synchronous control strategy based on strain energy. [PDF]

Sci Rep
Xue Y, Wang B, Xu J, Sun Q, Zhang P.
europepmc   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

Deep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source

Impact of soil compaction degree modulated by initial water content on maize root phenotype and hydraulic properties. [PDF]

Front Plant Sci
Fu Y, Si Z, Ma S, Cheng Y, Liu Z, Gao Y.
europepmc   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Research on self-adaptive height adjustment control of shearer based on deep deterministic policy gradient. [PDF]

PLoS One
Wang Y, Wang X, Lin G, Zhao L, Liu X, Jia B, Wang Y, He J, Ma L.   +8 more
europepmc   +1 more source

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

Design, simulation, and experimental study of hydrostatic drive system for wide-span farming platform. [PDF]

PLoS One
Ma J, Yan H, Li R, Li F, Fang X.
europepmc   +1 more source