首页 | 本学科首页   官方微博 | 高级检索  
     

变化 Wiener指数的变点研究
引用本文:陈志琳,王志远,林宁,高鸿杰,贾珍,魏福义.变化 Wiener指数的变点研究[J].计算机与数字工程,2014(7):1113-1118.
作者姓名:陈志琳  王志远  林宁  高鸿杰  贾珍  魏福义
作者单位:华南农业大学理学院,广州510642
基金项目:广东省大学生创新实验项目(编号1056412059);国家自然科学青年基金(编号11201156)资助。
摘    要:Wiener指数是 Harold Wiener提出的广泛应用于化学研究中的一个重要拓扑指数。I .Gutman等把Wiener指数推广为变化Wiener指数。M .H .Liu等给出了最大度Δ≥ n/2时,树中最大的变化Wiener指数的极图。论文用数值计算方法研究了树 F(n ,Δ)和 H(n ,Δ)的变化Wiener指数的大小关系,得到了刻画树 F(n ,Δ)和树 H (n ,Δ)的变化Wiener指数大小关系的变点λ0和 n ,Δ之间的变化规律,以及给定最大度的树中次大(小)的变化Wiener指数的极图。特别地,得出Δ< n/2时的变化规律。

关 键 词:变化Wiener指数    最大度  变点

Change Point of Variable Wiener Index
CHEN Zhilin,WANG Zhiyuan,LIN Ning,GAO Hongjie,JIA Zhen,WEI Fuyi.Change Point of Variable Wiener Index[J].Computer and Digital Engineering,2014(7):1113-1118.
Authors:CHEN Zhilin  WANG Zhiyuan  LIN Ning  GAO Hongjie  JIA Zhen  WEI Fuyi
Affiliation:(College of Science, South China Agricultural University, Guangzhou 510642)
Abstract:Wiener index ,set up by Harold Wiener ,is an important topological index widely used in chemical research . The variable Wiener index is as the Wiener index improved by some people such as I .Gutman ,M .H .Liu ,with his partners , have proved the extremal graph of the trees'largest variable Wiener index ,when given the maximum degree Δ≥ n/2 .In this dissertation ,numerical calculation is used to study the variable Wiener index between tree F(n ,Δ) and H(n ,Δ) .Finally ,the change point λ0 is finally worked out ,which depicts the variable Wiener index between tree F(n ,Δ) and H(n ,Δ) ,as well as the change rule betweennand Δ,and extremal graph of the second largest (smallest) variable Wiener index when given the maximum degree .In particular ,the change rule when Δ〈 n/2 is figured out .
Keywords:variable wiener index  trees  maximum degree  change point
本文献已被 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号