Results 171 to 180 of about 129,116 (308)

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 integrated compact digital hydraulic converter prototype for hydraulic transmission

Digital hydraulic converters are innovative devices that enable efficient regulation and control of hydraulic fluid flow and pressure. Unlike conventional methods that employ flow throttling and power dissipation, digital hydraulic converters use digital control signals to create highly efficient hydraulic fluid power systems.
Yuan, Chenggang, Pan, Min
openaire   +1 more source

Specialist 'restoration mortars': a comparison of the physical properties ot two stone repair materials [PDF]

, 2014
Forster, Alan Mark, Szadurski, Ewan Marek, Torney, Clare   +2 more
core   +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

Venous waterfalls mainly buffer backward pressure transmission. [PDF]

Intensive Care Med Exp
Castro R, Kattan E, Retamal J, Hernández G, Pinsky MR.   +4 more
europepmc   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Study on vibration characteristics of roadheader cutting pre-cracked hard rock. [PDF]

Sci Rep
Liu H, Li F, He J, Wang W, Zhang H.
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

The influence of hydraulic hose length on dynamic pressure waveforms including wave phenomena. [PDF]

Sci Rep
Stosiak M, Bury P, Karpenko M.
europepmc   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source