Results 121 to 130 of about 1,071,502 (272)

Performance analysis of 66/11 KV substation using Petri nets and vague lambda tau methodology

open access: yesKuwait Journal of Science, 2013
In this paper, a new methodology named as vague lambda-tau, is proposed for reliability analysis of the repairable systems. In this methodology, vague set theory is coupled with conventional lambda-tau method to evaluate the vague expressions for OR/AND ...
M. VERMA, A. KUMAR
doaj  

A Bio‐Inspired Perspective on Materials Sustainability

open access: yesAdvanced Materials, EarlyView.
This perspective discusses natural materials as inspiration for sustainable engineering designs and the processing of materials. First, circularity, longevity, parsimony, and activity are presented as essential material paradigms. The perspective then uses many examples of natural and technical materials to introduce principles such as oligo ...
Wolfgang Wagermaier   +2 more
wiley   +1 more source

Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals

open access: yesAdvanced Materials, EarlyView.
The review covers the past and current developments in light‐emitting diodes (LEDs) exploiting nanocrystals of halide perovskites and perovskite‐related materials. The review examines the aspects of material optimizations, device engineering, and applications.
Ying Liu   +7 more
wiley   +1 more source

Quota Trees [PDF]

open access: yesarXiv
We introduce the notion of quota trees in directed graphs. Given a nonnegative integer ``quota'' for each vertex of a directed multigraph $G$, a quota tree is an immersed rooted tree which hits each vertex of $G$ the prescribed number of times. When the quotas are all one, the tree is actually embedded and we recover the usual notion of a spanning ...
arxiv  

Wood and Cellulose: the Most Sustainable Advanced Materials for Past, Present, and Future Civilizations

open access: yesAdvanced Materials, EarlyView.
Wood and cellulose are the most abundant and important sustainable materials on the planet at the disposal to solve major societal challenges. This perspective, written for all materials scientists, highlights how breakthroughs in cellulose nanotechnology combined with functional nanomaterials can revolutionize important areas like construction ...
Mahiar Max Hamedi   +5 more
wiley   +1 more source

Environmental Sustainability of Natural Biopolymer‐Based Electrolytes for Lithium Ion Battery Applications

open access: yesAdvanced Materials, EarlyView.
Twenty‐one biopolymer electrolytes including membrane‐liquid electrolytes, gel electrolytes, and solid electrolytes are synthesized to analyze their electrochemical properties and environmental impacts through life cycle assessment. This consistent and comparable study demonstrates the significant functional and environmental benefits of biopolymer ...
Jing Huang   +4 more
wiley   +1 more source

Fast‐Charging Solid‐State Li Batteries: Materials, Strategies, and Prospects

open access: yesAdvanced Materials, EarlyView.
This review addresses challenges and recent advances in fast‐charging solid‐state batteries, focusing on solid electrolyte and electrode materials, as well as interfacial chemistries. The role of multiscale modeling and simulation in understanding Li+ transport and interfacial phenomena is emphasized, providing insights into materials, strategies, and ...
Jing Yu   +7 more
wiley   +1 more source

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