Results 211 to 220 of about 5,522,853 (247)

Confined Hot Carrier Cooling Via Excited‐State Energy Gap Engineering in Graphyne Carbon Allotropes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The excited‐state energy gap (EEG), regulated by the concentration of sp‐hybridized carbon, provides an effective handle for tuning electron–phonon coupling behavior. This design enables long‐lived confinement of hot carriers near the top of the EEG with controllable energy levels.
Fulong Dai, Zhaozhao Xiong, Yingcong Liu, Feiyu Cheng, Haochun Sun, Zhenfa Zheng, Jin Zhao, Zhuojian Liang, Zhuo Kang, Yue Zhang   +9 more
wiley   +1 more source

Advances in Design Strategy and Mechanism Insights for Alkaline Hydrogen Evolution Reaction: Multilevel Site Engineering and Structure–Activity Relationship

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This review is about material design based on engineering multilevel sites from theoretical calculation and synthetic routes to mechanism, structure–activity relationship, challenges and perspectives for boosting hydrogen production in alkaline electrolyte. Electrolytic water splitting is a clean, carbon‐free method for producing green hydrogen and has
Ke Zhang, Hongying Luo, Yudong Du, Kehao Yu, Huayu Wu, Shimin Chai, Yanyan Liu, Yongfeng Wang, Jianchun Jiang, Baojun Li   +9 more
wiley   +1 more source

Tuning Stability and Optoelectronic Properties of CsSnI3 Via Rare‐Earth Doping

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Sn‐based halide perovskites are promising optoelectronic materials but are limited by poor stability. Thus, rare‐earth elements (RE) doping in CsSnI3 addresses this limitation, significantly enhancing thermodynamic, mechanical, and chemical stability, while simultaneously tuning electronic characteristics and modulating optical responses in the ...
Haowei Wang, Feiyu Zhou, Zhuo Li, Yanghao Luo, Tongtong Li, Yilun Liu, Shengying Yue   +6 more
wiley   +1 more source

Helical Fiber‐Shaped Aqueous Zn‐Ion Batteries with Modified Zn Anode and Self‐Healing Gel Electrolyte for Flexible Electronics

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A triple synergistic strategy (bismuth‐modified Zn@CNTF anode, helical electrode architecture, and self‐healing gel electrolyte) endows fiber‐shaped aqueous Zn‐ion batteries with outstanding stability. The device delivers a high energy density of 130.54 Wh·kg−1 and retains ≈90.2% of its initial capacity after 1000 dynamic bending cycles, representing a
Wenhui Wang, Chaowei Li, Yinhao Xiao, Xiaoyu Zhang, Jingchao Zhang, Daojun Zhang, Weimin Du, Sehan Cheng, Dongliang Chao, Kai Zhang, Yagang Yao   +10 more
wiley   +1 more source

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Finding Objects by Grouping Primitives

Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284), 1999
We describe the use of a representation, called a body plan, to segment and to recognize people and animals in complex environments. The representation is an organized collection of grouping hints obtained from a combination of constraints on color and texture and constraints on geometric properties such as the structure of individual parts and the ...
David A. Forsyth, John A. Haddon, Sergey Ioffe   +2 more
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Primitive Group Treatment

Psychiatria Clinica, 2010
Although it has been known for many years that hallucinogenic drugs are used by witch doctors in the Peruvian jungles for therapeutic purposes, there have been no descriptions of their use. We studied one type of treatment carried out in groups of about 10 to 12 ‘patients’, where the healer makes a magical diagnosis and provides a potion, usually ...
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On the Primitivity of the Group Algebra

Canadian Journal of Mathematics, 1971
LetGbe a group andFa field of arbitrary characteristic. In [4] Kaplansky asks under what conditions isF[G] primitive, whereF[G] is the group algebra ofGoverF. We give some necessary conditions onGthatF[G] be primitive and propose a conjecture.Definition.A ringRis primitive if it has a faithful irreducible right module.The above should really be ...
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On the orders of Primitive Permutation Groups

Bulletin of the London Mathematical Society, 1980
CHERYL E. PRAEGE R AN JAD N SAXLThe proble omf bounding the order of a permutation grou G ipn terms of itsdegree n was one of the central problem of 19tsh century group theory (see [4]) It.is closely relate to thde 1860 Grand Prix proble of them Pari s Academy but it, shistory goe isn fact much further back (see e.g an. [3]d [10]), [1] .
Praeger, Cheryl E., Saxl, Jan
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The Primitivity of the Galois Group of a Trinomial

Journal of the London Mathematical Society, 1996
The primitivity of transitive permutation groups is examined in terms of conditions on a system of generators. The authors give a criterion of primitivity for the Galois group of an irreducible trinomial with integer coefficients of the form \(X^n+ ac^n X^s+ bc^n\) using the study of the inertia groups of primes in the splitting field of such ...
Movahhedi, A., Salinier, A.
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On Primitive and Inner Endomorphisms of Groups

Siberian Mathematical Journal, 2020
Let \(G_r\) be a relatively free group of rank \(r\) in some variety of groups \(V\). An element \(g\in G_r\) is called primitive if it contains in some basis of \(G_r\). An endomorphism \(\phi : G_r \rightarrow G_r\) is said to preserve primitive elements or, briefly, primitive if the image \(\phi (g)\) of each primitive element \(g\) is a primitive ...
openaire   +1 more source