Results 81 to 90 of about 10,276,216 (240)
The analysis of different partial wear degrees of cutter on the rock-breaking effect
KSCE Journal of Civil EngineeringWhen the tunnel boring machine (TBM) is engaged in rock-breaking operations, the cutters are subject to wear due to the harsh underground environment.
Peng Zhou +4 more
doaj +1 more source
Unit Experimental Study on Impact Crushing Rock of the Microcoring PDC Bit
Shock and Vibration, 2019 In light of the situation of sliced or powdery cuttings produced by conventional PDC bit, it is found that they are not convenient for geological logging and stratification.
Yingxin Yang +4 more
doaj +1 more source
Halide Perovskite: A Rich Source of Thermal Insulator
Advanced Science, EarlyView.Halide perovskites exhibit ultralow thermal conductivity driven by intrinsic lattice softness and strong anharmonicity, falling below conventional defect‐engineering limits. Weak metavalent bonding, A‐site rattling, and dynamic octahedral tilting drive phonon scattering to the Ioffe–Regel limit, where wave‐like tunneling replaces particle‐like ...
Haolin Ye +3 more
wiley +1 more source
Little Rock Departmental Club records
, 1933 This collection contains the administrative and historical records of the Little Rock Departmental ...
Little Rock Departmental Club (Little Rock, Ark.)
core +1 more source
Relaxor Ferroelectricity Enables Enhanced Thermoelectric Performance in In2Se3‐Alloyed GeTe
Advanced Science, EarlyView.A non‐equimolar In3+/Se2− alloying strategy creates Ge vacancies in GeTe, inducing relaxor ferroelectricity that broadens the low thermal conductivity window. Simultaneously, cubic phase stabilization broadens optimal electrical transport, achieving an average zT > 1.0 over 330–625 K.
Yuting Zhang +5 more
wiley +1 more source
Advanced Science, EarlyView.A flexible PDMS‐LATP polymer‐ceramic membrane creates lithium‐ion “superhighways” for rapid and selective extraction from complex brines. The amorphous PDMS matrix suppresses nonselective leakage and stabilizes the ceramic network, while LATP provides preferential Li+ conduction.
Xinxin Wei +12 more
wiley +1 more source
Study on Rock Breaking Characteristics of a Hybrid Bit
Shiyou jixie, 2020 Existing conventional PDC and roller bits are unable to meet the rock breaking requirements in deep and hard formations, difficult-to-drill formations and soft and hard formations.
吴泽兵 +4 more
doaj
Sheet‐Size‐Dependent Mosaicity of 2D Phyllosilicate Membranes
Advanced Science, EarlyView.This study explores how the size of 2D vermiculite sheets affects the structure of laminar membranes. High‐resolution x‐ray diffraction reveals how sheet size governs structural disorder and crystallinity. These changes directly impact ion permeability.
Min A Kim +6 more
wiley +1 more source
Trojan baseball team from Little Rock University
, 2008 The Trojan baseball team from Little Rock University plays a game.Original held at Ottenheimer Library, University of Arkansas at Little ...
UALR News Bureau (Little Rock, Ark.)
core +1 more source
Applied SciencesThe vibration of rock breaking in tunnel excavation may cause serious damage to nearby buildings if it is not controlled properly. With reference to a hard rock tunnel in China, the vibration response to the high-pressure gas expansion method (HPGEM), an
Huaide Peng +5 more
doaj +1 more source