Results 181 to 190 of about 6,861 (260)

Research on multi-physical field coupling modeling and multi-condition dynamic load capacity evaluation of oil-immersed transformers. [PDF]

Sci Rep
Zhu H, Xiaohang R, Guobo Y, Chunlei Y, Xiaoqian B.   +4 more
europepmc   +1 more source

Influence of Viscous Dissipation on Wear Behavior and Hardness Evolution of Tool Steels in Glass‐Fiber‐Reinforced Polymer Processing

steel research international, EarlyView.
Tool steels tested under injection molding conditions with glass‐fiber‐reinforced polymers, revealing how viscous dissipation drives hardness loss, even in PM grades. A sharp rise in wear with increasing injection volume rate and thermomechanical load uncovers striking material differences.
David Zidar, Roman Staudigl, Walter Friesenbichler, Clemens Holzer   +3 more
wiley   +1 more source

A Case Report on Rehabilitation of the Asiatic Black Bear (Ursus thibetanus ussuricus) in the Wild 亚洲黑熊 (Ursus thibetanus ussuricus) 野外放归野化案例报告

Wildlife Letters, EarlyView.
Asiatic black bears in Russia face conservation threats such as habitat destruction and fragmentation, which exacerbate food shortages caused by crop failures. This study explores an innovative approach to rehabilitating bears that abandon hibernation in mid‐winter due to extreme exhaustion by providing supplemental food near their den sites.
Sergey A. Kolchin, Platon A. Maistrenko, Aleksey Yu. Oleynikov   +2 more
wiley   +1 more source

Selective Green Colorimetric Liquid- and Solid-Based Determination of Furfural in Power Transformer Insulating Fluid. [PDF]

ACS Omega
Kim E, Jun T, Kim AR, Kwak BS, Park H.
europepmc   +1 more source

Effect of Unit Cell Topology on Dielectric Properties of Periodic Lattice Materials Used for Functionally Graded Insulation

High Voltage, EarlyView.
ABSTRACT Periodic lattice material (PLM) is an innovative material system capable of rapidly and efficiently constructing functionally graded materials (FGMs). Among various PLM structures, triply periodic minimal surfaces (TPMS) exhibit numerous advantages, making TPMS‐based lattice materials a potential candidate to electrical FGMs.
Zihao Liu, Wendong Li, Peng Sun, Ni Wang, Xin Zhao, Yucheng Zhang, Chao Wang, Guanjun Zhang   +7 more
wiley   +1 more source

Adding Yttrium to SO₄ ^2-/ZrO₂ Catalysts To Improve the Synthesis Performance of Esters for Electrical Insulating Oils. [PDF]

ACS Omega
Kwak BS, Kim E, Jun T, Kim AR, Moon Y, Lee J, Kang M, Park H.   +7 more
europepmc   +1 more source

Evaluation Methodology, Numerical Verification and Retrofilling Procedure for Power Transformers to Ensure K‐Class Flame Retardancy and Environmentally Friendly

High Voltage, EarlyView.
ABSTRACT With increasing demands for fire safety and environmental friendliness, retrofilling transformers with alternative insulating liquids has become a growing trend. However, retrofilling power transformers remains uncertain, as more residual mineral oil compromises K‐class flame retardancy, and its impact on environmental performance has yet to ...
Zhenfu Tang, Yihua Qian, Dan Zhou, Wei Hu, Feipeng Wang, Yang Xu   +5 more
wiley   +1 more source

Study on Dielectric Properties of Nanoclay-Modified Disulfide-Containing Polyurea Composites. [PDF]

Nanomaterials (Basel)
Li X, Wang F, Yin H, Wang Y, Li G, Huang J, Yuan Y, Zhou M, Zhao S, Liang Y, Cao G, Li L.   +11 more
europepmc   +1 more source

Investigating Breathing Dynamics of a 110 kV Oil‐Immersed Transformer Using Thermal‐Fluid‐Structure Interaction Modelling

High Voltage, EarlyView.
ABSTRACT The breathing system of an oil‐immersed transformer is of vital importance for maintaining equilibrium between internal and external pressures, with any malfunction potentially disrupting the transformer's stable operation. This study develops a thermal–fluid–structure interaction (TFSI) model to simulate the breathing phenomenon in a 110 kV ...
Lujia Wang, Guangyi Chen, Dong Shang, Xiang Zhang, Haitao Yang, Jianwen Zhang   +5 more
wiley   +1 more source

Study of Winding Short Circuit Characteristics Under Different Insulation Material Temperatures in Transformers. [PDF]

Materials (Basel)
Zhou X, Ma Y, Wang X, Tian T, Tai C, Chen D, Wang S.   +6 more
europepmc   +1 more source