نتایج جستجو برای: catacondensed hexagonal system

تعداد نتایج: 2242900  

Journal: :International journal of multidisciplinary research and analysis 2022

In recent years, Hexagonal chess has gradually appeared in various machine gaming competitions, and is popular among the public because of its simple fair game rules. this system, a computer program studied designed with Chess as object study. order to further improve search speed algorithm, UCT algorithm used paper. This not only improves time Monte Carlo tree but also performance space.

Journal: :Int. J. Math. Mathematical Sciences 2006
José Antonio de la Peña L. Mendoza

We consider hexagonal systems embedded into the 3-dimensional space R3. We define the fundamental group π1(G) of such a system G and show that in case G is a finite hexagonal system with boundary, then π1(G) is a (non-abelian) free group. In this case, the rank of π1(G) equals m(G) − h(G) − n(G) + 1 where n(G) (resp. m(G), h(G)) denotes the number of vertices (resp. edges, hexagons) in G. A hex...

Journal: :Discrete Mathematics 1995
Fuji Zhang Xueliang Li

An edge of a hexagonal system H is said to be forcing if it belongs to exactly one perfect matching of H. Using the concept of Z-transformation of hexagonal system, we give a characterization for the hexagonal systems with forcing edges and determine all forcing edges is such systems. We also give the generating function of all hexagonal systems with forcing edges. A hexaoonal system, also call...

Journal: :The Journal of chemical physics 2014
Ian Williams Erdal C Oğuz Robert L Jack Paul Bartlett Hartmut Löwen C Patrick Royall

The behaviour of materials under spatial confinement is sensitively dependent on the nature of the confining boundaries. In two dimensions, confinement within a hard circular boundary inhibits the hexagonal ordering observed in bulk systems at high density. Using colloidal experiments and Monte Carlo simulations, we investigate two model systems of quasi hard discs under circularly symmetric co...

Journal: :Journal of chemical information and computer sciences 2002
Jan Cz. Dobrowolski

The structure and stability of ca. 100 nonplanar constitutional isomers of the coronene molecule of general formula C(24)H(12) have been estimated by semiempirical and by ab initio calculations. The isomers studied are unbranched cyclic catacondensed structures and fall into two classes, viz., the belt (B) and the Moebius (M) type. The calculations have shown some of the M-isomers to be more st...

Journal: :iranian journal of mathematical chemistry 2012
t. doslic

zagreb indices belong to better known and better researched topological indices. weinvestigate here their ability to discriminate among benzenoid graphs and arrive at some quiteunexpected conclusions. along the way we establish tight (and sometimes sharp) lower andupper bounds on various classes of benzenoids.

1999
Wesley E. Snyder Hairong Qi William Sander

A coordinate system is described which provides a natural means for representing hexagonally-organized pixels. The coordinate system has the unusual property that its basis vectors are not orthogonal. Vector-space properties and operations are described in this coordinate system, and shown to be straightforward computations. Some image processing algorithms, including calculations of image grad...

Journal: :The Biochemical journal 1992
J Castresana J L Nieva E Rivas A Alonso

The gel-to-fluid and lamellar-to-HII-hexagonal thermotropic phase transitions of egg-yolk phosphatidylethanolamine have been examined by Fourier-transform infrared spectroscopy under a variety of conditions, namely excess water at pH 5.0, excess water at pH 9.5 and low hydration. The various lamellar and hexagonal phases have been characterized by X-ray diffraction. At pH 5.0, gel-fluid and lam...

Journal: :Chemical communications 2011
Daqin Chen Ping Huang Yunlong Yu Feng Huang Anping Yang Yuansheng Wang

A new strategy of synthesizing hexagonal upconversion NaYF(4) at low temperature (down to 130 °C) based on Ti(4+) doping-induced cubic-to-hexagonal phase transition in a liquid-solid-solution reaction system is offered.

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