Results 31 to 40 of about 3,418,514 (199)

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source

Dynamic Characteristics of Horizontal Drilling with Flexible Drill String Based on ABAQUS Explicit Dynamics

Shiyou jixie
During the drilling of ultrashort-radius radial horizontal well with flexible drill string， the vertical shift of wellbore trajectory affects the encountering rate of target points.
Liu Xin Huang Zhongwei Wu Xiaoguang Li Gensheng Shi Huaizhong Wang Jiarui Wang Minghao, Huang Zhongwei, Wu Xiaoguang, Li Gensheng, Shi Huaizhong, Wang Jiarui, Wang Minghao   +6 more
doaj   +3 more sources

Mitochondria and Neuromast Tagging With Fluorescent Gallium‐Triapine Analogues: In Cellulo MP FLIM and Zebrafish Live Imaging

Advanced Science, EarlyView.
Fluorescent BODIPY‐conjugated thiosemicarbazone ligands and their Ga(III), In(III), and Fe(III) complexes, inspired by Triapine, are developed as theranostic agents. Multiphoton FLIM and confocal microscopy in cancer cells and zebrafish reveal real‐time uptake, mitochondrial localisation, and whilst spectroscopic assays indicated preserved complex ...
Megan J. Green, Michael W. Jones, Merissa Saleem, Haobo Ge, Melita Tvardauskaite, Julia Dudzic, Fernando Cortezon‐Tamarit, Rory L. Arrowsmith, Charareh Pourzand, Gabriele Kociock‐Kohn, Nicholas H. Rees, Jonathan R. Dilworth, Stephen Faulkner, Stanley W. Botchway, David Gurevich, Sofia I. Pascu   +15 more
wiley   +1 more source

Axial and torsional self-excited vibrations of a distributed drill-string [PDF]

, 2019
We consider a distributed axial-torsional drill-string model with a rate-independent bit-rock interaction law to study the occurrence and non-local characteristics of axial and torsional self-excited vibrations as caused by the regenerative effect.
Aarsnes, Ulf Jakob F., Aarsnes, Ulf Jakob F, Wouw, N Nathan van de, van de Wouw, Nathan   +3 more
core   +2 more sources

Pre‐Regenerative Endothelial Cells Empowered by Antler Blood Exosomes Orchestrate Peripheral Nerve Repair

Advanced Science, EarlyView.
The pre‐regenerative vascular niche (PVN) is essential for nerve repair, yet its endothelial blueprint remains unclear. We identified angiogenic ECs (AECs) as the dominant pre‐regenerative subset and found that antler blood–derived exosomes (AB‐EXO) promote repair via IMP3.
Jinsheng Huang, Qiang Chen, Aihua Jin, Xiaoqi Yang, Hui Zhou, Weiquan Gong, Jin Cheng, Jun Dai, Minjin Wang, Meihua Piao, Yuanyi Wang, Nan Zhou   +11 more
wiley   +1 more source

LQR Control of Axial-Torsional Bidirectional Vibration of Drill String in Oil and Gas Wells

Shiyou jixie
To effectively solve the failure problem induced by axial-torsional bidirectional vibration of drill string， with the help of the 3-DOF dynamics model of drill pipe， a simulation study was performed on the suppression of linear quadratic regulator （LQR ...
Li Xinye, Zhang Wenbo, Guo Xiaoqiang, Zhang Wenxue, Ye Chengyang   +4 more
doaj   +3 more sources

Analysis on the dynamics of flexible drillstring under different drilling parameters

Frontiers in Earth Science
During the operation of the drill string, it displays a degree of flexibility. Simultaneously, its dynamic properties, influenced by complex stress conditions, manifest nonlinearity and uncertainty.
Jifei Cao, Jifei Cao, Deyong Zou, Qilong Xue, Jin Wang, Leilei Huang, Feng Guo, Chong Wang, Jun Qu   +8 more
doaj   +1 more source

Nrsn1–Smarcc1 Coupling Regulates Neural Stem Cell Differentiation and Chronic‐phase Recovery After Ischemic Stroke

Advanced Science, EarlyView.
In the post‐stroke brain, Foxa2 induces the transcriptional upregulation of Nrsn1 in NSCs. Nrsn1 functionally couples with Smarcc1, modulating its nuclear availability and protein abundance, thereby influencing Smarcc1‐associated regulatory programs linked to neuronal lineage commitment. Through this coupling, Nrsn1 promotes the differentiation of NSCs
Ruolin Zhang, Chang Liu, Yuneng Zhou, Kaichen Zhao, Muyang Li, Bingcheng Cai, Ying Wang, Zhiyuan Yuan, Zhaoxin Liu, Zilong Yuan, Yao Xiao, Peiyang Zhou, Ke Shui, Wendai Bao, Min Zhang, Jun Qin, Jun Chen, Xin Yang, Zhiqiang Dong   +18 more
wiley   +1 more source

An integrated model for drill-string dynamics

, 1999
The vibrational states experienced by the active components of a drilling assembly such as that found in the oil or gas industry are discussed in the context of an integrated mathematical model. The work is motivated by the need to understand the complex
Wang, Charles, Tucker, Robin
core   +4 more sources

Study on wellbore temperature of riserless mud recovery system by CFD approach and numerical calculation

Petroleum, 2020
The riserless mud recovery (RMR) system abandons the riser used in conventional offshore drilling, and the drill string above the seabed is directly exposed to seawater, resulting in convective heat transfer from the drilling fluid in the drill string to
Xin Li, Jie Zhang, Xu Tang, Gezhen Mao, Peigang Wang   +4 more
doaj   +1 more source