Results 1 to 10 of about 2,091,746 (145)

Relating resonance energy with the Zhang-Zhang polynomial [PDF]

open access: yesJournal of the Serbian Chemical Society, 2007
The Zhang-Zhang polynomial ζ(x) is a recently conceived tool in the mathematical apparatus of theoretical chemistry. It combines (in a quantitative manner) the Kekulé- and Clar-structure-based features of benzenoid molecules.
Gojak Sabina   +3 more
doaj   +3 more sources

The Multivariable Zhang–Zhang Polynomial of Phenylenes

open access: yesAxioms, 2023
The Zhang–Zhang polynomial of a benzenoid system is a well-known counting polynomial that was introduced in 1996. It was designed to enumerate Clar covers, which are spanning subgraphs with only hexagons and edges as connected components.
Niko Tratnik
doaj   +1 more source

Thirty-five new species of the spider genus Pimoa (Araneae, Pimoidae) from Pan-Himalaya [PDF]

open access: yesZooKeys, 2021
Thirty-five new species of the Pimoa Chamberlin & Ivie, 1943 are described from Pan-Himalaya: P. anning Zhang & Li, sp. nov. (♂♀), P. bomi Zhang & Li, sp. nov. (♂♀), P. cawarong Zhang & Li, sp. nov. (♀), P.
Hao Xu   +4 more
doaj   +3 more sources

Zhang Zai, Zhengmeng

open access: yesEstudios de Asia y África, 2022
El Zhengmeng es la obra más importante e influyente de Zhang Zai y representa la plena madurez de su pensamiento. Aun cuando el pasaje más famoso y comentado del Zhengmeng sea la primera parte del capítulo 17 (el “Ximing”), tradicionalmente se considera
Filippo Costantini
doaj   +1 more source

Zhang–Zhang Polynomials of Multiple Zigzag Chains Revisited: A Connection with the John–Sachs Theorem

open access: yesMolecules, 2021
Multiple zigzag chains Zm,n of length n and width m constitute an important class of regular graphene flakes of rectangular shape. The physical and chemical properties of these basic pericondensed benzenoids can be related to their various topological ...
Henryk A. Witek
doaj   +1 more source

Light People: Professor Cheng Zhang

open access: yesLight: Science & Applications, 2023
Editorial Nanophotonics has emerged as a cutting-edge interdisciplinary research field today. Its primary objective is to leverage the interaction between light and matter at the wavelength and sub-wavelength scales, with the purpose of designing and ...
Siqiu Guo
doaj   +1 more source

Corrective feedback, learner uptake, and feedback perception in a Chinese as a foreign language classroom [PDF]

open access: yes, 2016
The role of corrective feedback in second language classrooms has received considerable research attention in the past few decades. However, most of this research has been conducted in English-teaching settings, either ESL or EFL.
Fu, Tingfeng, Nassaji, Hossein
core   +3 more sources

First person – Youwen Zhang

open access: yesDisease Models & Mechanisms, 2021
First Person is a series of interviews with the first authors of a selection of papers published in Disease Models & Mechanisms, helping early-career researchers promote themselves alongside their papers.
doaj   +1 more source

Six new species of Horniella Raffray from the Oriental region (Coleoptera, Staphylinidae, Pselaphinae) [PDF]

open access: yesZooKeys, 2021
The Oriental pselaphine genus Horniella Raffray, 1905 currently contains 29 species. In this paper, six new species are described: H. nantouensis Zhang, Hu & Yin, sp. nov. and H. taiwanensis Zhang, Hu & Yin, sp. nov. from Taiwan, China; H.
Wen-Xuan Zhang, Fang-Shuo Hu, Zi-Wei Yin
doaj   +3 more sources

Eight new species of the spider genus Pimoa (Araneae, Pimoidae) from Tibet, China [PDF]

open access: yesZooKeys, 2020
Eight new species of the spider genus Pimoa Chamberlin & Ivie, 1943 are described from Tibet, China: P. cona Zhang & Li, sp. nov. (♂♀), P. duiba Zhang & Li, sp. nov. (♂♀), P. lemenba Zhang & Li, sp. nov. (♀), P.
Xiaoqing Zhang   +3 more
doaj   +3 more sources

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