Results 171 to 180 of about 145,679 (305)

Optimization of PDC Cutter for Percussive Drilling in Deep Highly-Abrasive Strata in the East China Sea Basin

Shiyou jixie
The problems of low rate of penetration(ROP),easy wear of PDC cutters and small single-bit footage are becoming increasingly prominent in the deep strata of the East China Sea Basin.
Li Jiwei, Li Qian, Tian Shenglei, Huang Da, Li Yumei, Xi Yan   +5 more
doaj  

Sound propagation through bone [PDF]

Effect of perforation on structure borne sound propagation through rigid porous materials has been investigated. Experimental works has been carried out on rigid porous materials with and without perforations.
Aygun, Haydar
core  

Lateral Drop-Weight Impact Response of SRC Columns with Built-In L-Shaped Steel: Role of Impact Velocity, Axial Compression Ratio, and Stirrup Spacing. [PDF]

Materials (Basel)
Tang Y, Yang L, Feng Y, Zhang N, Li J, Zeng L.   +5 more
europepmc   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Impact Response Test and Ignition Characteristics of HMX/Al Energetic Composites Based on the Force-Electric Coupling Method under a Drop Hammer. [PDF]

ACS Omega
Yuan J, Han P, Zhai Z, Liu Y, Yang Q, Yang J.   +5 more
europepmc   +1 more source

Covalently Bonded S‐Scheme Polymer Heterojunction for Highly Efficient Solar Hydrogen Evolution

EcoEnergy, EarlyView.
A covalently integrated all‐organic S‐scheme heterojunction (B‐CN2@Py‐CN) establishes atomic‐level charge transport channels and a strong built‐in electric field, enabling exceptional charge separation efficiency. This molecularly engineered photocatalyst achieves a cocatalyst‐free hydrogen evolution rate of 27.9 mmol g−1 h−1 under visible light ...
Dong Liu, Chaohui Sun, Xianghua Zeng, Shuhan Sun, Huaqing Zhang, Yanting Tian, Baoyou Liu, Gang Yue, Shixiong Liang, Zhanfeng Li, Yue Tian, Xianqiang Xiong   +11 more
wiley   +1 more source

An ambient acoustic ice-fracturing dataset taken in shallow freshwater. [PDF]

Sci Data
Case J, Barnard A, Brown D.
europepmc   +1 more source

Synergistic Microstructure and Dielectric Engineering of Recyclable Single‐Electrode Triboelectric Nanogenerators for Sustainable Smart Homes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A recyclable triboelectric nanogenerator integrating a pseudo‐honeycomb microstructure with liquid metal doping achieves 120% higher output (122 mW m−2) and >90% retention over seven cycles, enabling self‐powered smart home functions. The performance of single‐electrode triboelectric nanogenerators (SE‐TENGs) is governed by the effective contact area ...
Chencheng Hu, Yuehan Pei, Wenbo Hu, Yu Qi, Ruida Cao, Long Yang, Zitong Kan, Yang Lu, Biao Dong, Hongwei Song, Lin Xu   +10 more
wiley   +1 more source

N-nitrosaccharins are not insensitive chemicals. [PDF]

Nat Commun
Muravyev NV, Dalinger IL, Vatsadze IA, Melnikov IN.   +3 more
europepmc   +1 more source

High‐Performance Wearable Triboelectric Nanogenerators Based on Polyethyleneimine‐Doped Cellulose Acetate for Self‐Powered Dynamic Signature Sensing and Verification

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A high‐performance wearable triboelectric nanogenerator (TENG) based on polyethyleneimine ‐doped cellulose acetate is demonstrated for dynamic signature authentication. The developed TENG with enhanced interfacial polarization and increased surface charge density exhibits excellent mechanical durability, environmental stability, and long‐term ...
Yoon‐Seo Choi, Han‐Bi Kang, Chae‐Eun Kim, Tae‐Jun Ha   +3 more
wiley   +1 more source