Results 11 to 20 of about 63,940 (291)
The rock breaking and ROP increase mechanisms for single-tooth torsional impact cutting using DEM
Petroleum Science, 2019 Torsional impact drilling is a new technology which has the advantages of high rock-breaking efficiency and a high rate of penetration (ROP). So far, there is no in-depth understanding of the rock-breaking mechanism for the ROP increase from torsional ...
Xiao-Hua Zhu, Yun-Xu Luo, Wei-ji Liu
doaj +3 more sources
Planetary gyre, time-dependent eddies, torsional waves, and equatorial jets at the Earth's core surface [PDF]
, 2015 We report a calculation of time-dependent quasi-geostrophic core flows for 1940-2010. Inverting recursively for an ensemble of solutions, we evaluate the main source of uncertainties, namely the model errors arising from interactions between unresolved ...
Finlay, C. C., Gillet, N, Jault, D
core +4 more sources
QRB Discovery, 2022 Changing torsional restraints on DNA is essential for the regulation of transcription. Torsional stress, introduced by RNA polymerase, can propagate along chromatin facilitating topological transitions and modulating the specific binding of transcription
Johanna Hörberg +2 more
doaj +1 more source
Impact of Aggregated PV on Subsynchronous Torsional Interaction [PDF]
2020 47th IEEE Photovoltaic Specialists Conference (PVSC), 2020 This paper investigates induced oscillation (specifically subsynchronous torsional interactions) in power systems arising from photovoltaic (PV) power modulation. Time domain simulations of a modified IEEE first-benchmark system are presented and analyzed.
Rasel Mahmud, Andy Hoke, Jonathan White
openaire +1 more source
Impact of load dynamics on torsional interactions [PDF]
2016 Power Systems Computation Conference (PSCC), 2016 This paper evaluates the impact of load dynamics on torsional interactions by considering a mix of static and dynamic loads aggregated at the bulk transmission level. This is essential to investigate the importance of detailed load modelling for subsynchronous resonance (SSR) studies to accurately assess damping contribution and capture system dynamics.
Dattaray, P +5 more
openaire +2 more sources
Shiyou jixie, 2023 The development and application of the torsional impact drilling model improve the efficiency of breaking rocks along the wellbore circumference.To enhance the rock-breaking efficiency of the compound impact drilling and the optimal torsional-axial ...
Qi Yue +5 more
doaj
Mitigation of Torsional Vibrations in a Modular Drivetrain with Interleaving Control
Machines, 2022 In order to meet requirements in machine design, modularity is often brought forward as a way to cope with load variations and adaptability of the architecture.
David van Os +4 more
doaj +1 more source
Influencing the conductance in biphenyl-like molecular junctions with THz radiation [PDF]
, 2013 We investigate the torsional vibrations in biphenyl-like molecular junctions and transport properties in the presence of an external THz field. Ab-initio calculations including external electric fields show that the torsional angle {\phi} of a thiolated ...
Almenningen +32 more
core +2 more sources
Developments in the Built Environment, 2023 This study investigates the effectiveness of flanges with various types of stirrup and cross-sectional dimensions on the torsional behaviors of ultra-high-performance fiber-reinforced concrete (UHPFRC) hollow beams.
Jiale Zhou +4 more
doaj +1 more source
Energy Reports, 2021 In the present study, a 3D FEM of compound percussive system considering a loading–unloading cycle was employed to simulate the dynamic single-cutter-rock interaction.
Yumei Li +4 more
doaj +1 more source