Results 41 to 50 of about 2,118 (255)

Robust Photocatalytic Hydrogen Evolution Over a Conjugated Metal‐Organic Framework Heterojunction

Advanced Science, EarlyView.
We report a conjugated coordination polymer, Cd‐TMT (TMT = 1,3,5‐trimercaptotriazine), featuring an intrinsic molecular‐level charge transport network. The conjugated TMT ligands facilitate strong intra‐ligand charge transfer, while their ordered π‐π stacking along the [111] direction establishes a continuous pathway for directional electron migration,
Chunzhe Wang, Yufei Shan, Ruobing Chu, Lingzhi Yang, Zhanning Liu, Xiaoli Zhang, Jian Tian   +6 more
wiley   +1 more source

Distribution Characteristics of Fragments Size and Optimization of Blasting Parameters Under Blasting Impact Load in Open-Pit Mine

IEEE Access, 2019
The size distribution characteristics of fragments formed after loose blasting in open-pit mine will directly affect the economic benefits of the mining enterprise.
Xiaohua Ding, Wei Zhou, Xiang Lu, Ming Li, Ebelia Manda, Xuyang Shi, Boyu Luan, Chongchong Qi   +7 more
doaj   +1 more source

Design methods for open pit coal mine footwalls

, 1986
Special design methods are required for footwalls due to the inability to detect problem geometries (rolls, cross faults, pinchout) prior to mining. Application of new analytical methods to different failure modes is discussed together with aspects of monitoring, geometry detection and mitigation.
D S Cavers, G H Baldwin, T Hannah, R K Singhal   +3 more
openaire   +1 more source

Bio‐Based Polyurethanes for Sustainable and Multifunctional Applications

Advanced Science, EarlyView.
Bio‐based polyurethanes prepared from vegetable oils, lignin, and polysaccharides have attracted increasing interest as alternatives to fossil‐derived polyurethanes. This review summarizes recent progress in their chemistry, structural engineering, and advanced applications, highlighting the roles of feedstocks, chain‐segment design, dynamic covalent ...
Xin Li, Henghui Deng, Shiwei Yu, Jiawei Huang, Zehong Chen, Dawei Zhao, Chaoqun Zhang   +6 more
wiley   +1 more source

Safety of Sodium‐Ion Batteries: Evaluation and Perspective from Component Materials to Cells, Modules, and Packs

Advanced Energy Materials, EarlyView.
This review provides a bottom‐up evaluation of sodium‐ion battery safety, linking material degradation mechanisms, cell engineering parameters, and module/pack assembly. It emphasizes that understanding intrinsic material stability and establishing coordinated engineering control across hierarchical levels are vital for preventing degradation coupling ...
Won‐Gwang Lim, Seoa Kim, Erik A. Wu, Darren H. S. Tan, Shawn Peng, Xiaolin Li   +5 more
wiley   +1 more source

Pollutant emission from fires at open-pit coal mines

IOP Conference Series: Earth and Environmental Science, 2021
Abstract Existing coal mining technologies are associated with significant pollution of the natural environment, especially atmospheric air. On top of this, in the event of an emergency related to the spontaneous combustion of coal, this negative impact significantly increases.
M A Murzin, N V Gorlenko
openaire   +1 more source

Application of a novel schema for describing fossil fern foliage and investigating taxonomic and morphological change across the Cretaceous–Paleogene boundary in western North America

American Journal of Botany, EarlyView.
Abstract Premise The Chicxulub asteroid impact at the Cretaceous–Paleogene (K–Pg) boundary triggered a mass extinction 66 million years ago. Ferns thrived in the aftermath of the extinction, evidenced by the well‐documented “fern spore spike.” However, fern macrofossil records across the K–Pg boundary are less understood.
Fern B. Holian, Emily B. Sessa, Richard S. Barclay, Regan E. Dunn, Jacquelyn L. Gill, Kirk R. Johnson, S. Augusta Maccracken, Ian M. Miller, Jarmila Pittermann, Ellen D. Currano   +9 more
wiley   +1 more source

Theory and technical system of coal ecological open-pit mining and its application

Meitan xuebao
Large-scale open-pit coal mining will cause ecological problems such as land excavation and occupation, groundwater drainage, soil erosion, vegetation destruction, air pollution, and regional landscape damage. The selection of existing open-pit coal mine
Quansheng LI
doaj   +1 more source

Effect of Laser Posterior Nasal Neurolysis for the Treatment of Chronic Rhinitis: A Randomized Controlled Trial

International Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Background To determine the safety and efficacy of laser ablation of the posterior nasal nerve (PNN) for the treatment of chronic rhinitis. Methods This study was a single‐center, prospective, single‐blinded, randomized sham‐controlled trial. Patients with a 24‐h reflective Total Nasal Symptom Score (rTNSS) ≧ 5, rhinorrhea ≧ 2, and congestion ≧
Jyun‐Yi Liao, En‐Ying Wang, Ying‐Shuo Hsu, Ming‐Shao Tsai, Cheng‐Jung Wu, Chia‐Hao Chang, Yi‐Li Hwang, Han‐Lo Teng, Jun‐Wei Hsieh, Chien‐Yu Huang   +9 more
wiley   +1 more source

Research on the construction method of temporal knowledge graph for open-pit coal mine slope safety

Gong-kuang zidonghua
This paper aims to address the issues of insufficient temporal knowledge graphs for open-pit coal mine slope safety, difficulties in effectively sharing data resources, and limitations in handling dynamic knowledge. A method for constructing the temporal
CHU Yangjing, ZHANG Heng, TANG Ling, HOU Xiaodong   +3 more
doaj   +1 more source