您的位置: 专家智库 > 资助详情>国家自然科学基金(30570426)

国家自然科学基金(30570426)

作品数:5 被引量:3H指数:1
相关作者:喻祖国周志英周立前廖芳芳更多>>
相关机构:湘潭大学湖南科技大学更多>>
发文基金:国家自然科学基金霍英东教育基金霍英东青年教师基金更多>>
相关领域:理学生物学更多>>

文献类型

  • 5篇中文期刊文章

领域

  • 4篇理学
  • 1篇生物学

主题

  • 1篇英文
  • 1篇弱收敛
  • 1篇收敛性
  • 1篇系统发育
  • 1篇系统发育树
  • 1篇脊椎动物
  • 1篇记忆函数
  • 1篇函数
  • 1篇分形
  • 1篇SCALE
  • 1篇SIERPI...
  • 1篇SIERPI...
  • 1篇THE_EN...
  • 1篇TRANSP...
  • 1篇COOKIE
  • 1篇EQUATI...
  • 1篇FELLER
  • 1篇FUNCTI...
  • 1篇GENERA...
  • 1篇HAUSDO...

机构

  • 3篇湘潭大学
  • 1篇湖南科技大学

作者

  • 2篇喻祖国
  • 1篇周志英
  • 1篇廖芳芳
  • 1篇周立前

传媒

  • 3篇湘潭大学自然...
  • 1篇Chines...
  • 1篇Applie...

年份

  • 1篇2010
  • 4篇2007
5 条 记 录,以下是 1-5
排序方式:
一种基于线粒体完全基因组的熵密度分布的脊椎动物系统发育树构建方法
2007年
线粒体完全基因组是一种构建脊椎动物系统发育树的非常重要的数据资源.该文中我们应用基于非序列比对的熵密度分布方法结合对数关联距离对64种脊椎动物的线粒体完全基因组进行分析处理并构建系统发育树,产生的树将所选择的生物体分为三个大类:哺乳类(Mammalia)、鱼类(Fish)和初龙下纲(包括鸟类(Birds)和爬行类(Reptiles)),其拓扑结构与当前已知的用传统方法产生的树相似.
周立前
关键词:系统发育树
随机广义Cookie-cutter集上的随机紧测度的收敛性(英文)
2007年
首先构造了[0,T]上的随机广义cookie-cutter集KT.令Kn为构造KT中的第n级集合,并在Kn上定义记忆函数.基于这个记忆函数,定义了Kn上的随机概率测度φn(τ).令Ψn(.)=Eφn(.),其中Ψn为随机测度φn的紧测度.最后证明了序列Ψn是弱收敛的且有Ψ=limΨn.
廖芳芳喻祖国
关键词:弱收敛记忆函数
相似比a∈[1/4,1/3)的泛Sierpinski垫片的精确Hausdorff测度被引量:2
2007年
讨论了泛Sierpinski垫片的精确Hausdorff测度计算问题.当相似比a∈[1/4,1/3)时,记s=-log3/loga为泛Sierpinski垫片的Hausdorff维数,该文证明了泛Sierpinski垫片的s-Hausdorff测度为1.
周志英喻祖国
关键词:分形HAUSDORFF测度
SCALE AND TIME EFFECTS ON MATHEMATICAL MODELS FOR TRANSPORT IN THE ENVIRONMENT
2007年
The purpose of this paper is to analyse mathematical models used in environmental modelling. Following a brief survey of the development in modelling scale- and time-dependent dispersion processes in the environment, this paper compares three similarity solutions, one of which is a solution of the generalized Feller equation (GF) with fractal parameters, and the other two for the newly-developed generalized Fokker-Planck equation (GFP). The three solutions are derived with parameters having physical significance. Data from field experiments are used to verify the solutions. The analyses indicate that the solutions of both GF and GFP represent the physically meaningful natural processes, and simulate the realistic shapes of tracer breakthrough curves.
Su Ninghu School of Mathematics and Computational Science,Xiangtan University,Hunan 411105,China
Chaos game representation of functional protein sequences,and simulation and multifractal analysis of induced measures被引量:1
2010年
Investigating the biological function of proteins is a key aspect of protein studies. Bioinformatic methods become important for studying the biological function of proteins. In this paper, we first give the chaos game representation (CGR) of randomly-linked functional protein sequences, then propose the use of the recurrent iterated function systems (RIFS) in fractal theory to simulate the measure based on their chaos game representations. This method helps to extract some features of functional protein sequences, and furthermore the biological functions of these proteins. Then multifractal analysis of the measures based on the CGRs of randomly-linked functional protein sequences are performed. We find that the CGRs have clear fractal patterns. The numerical results show that the RIFS can simulate the measure based on the CGR very well. The relative standard error and the estimated probability matrix in the RIFS do not depend on the order to link the functional protein sequences. The estimated probability matrices in the RIFS with different biological functions are evidently different. Hence the estimated probability matrices in the RIFS can be used to characterise the difference among linked functional protein sequences with different biological functions. From the values of the Dq curves, one sees that these functional protein sequences are not completely random. The Dq of all linked functional proteins studied are multifractal-like and sufficiently smooth for the Cq (analogous to specific heat) curves to be meaningful. Furthermore, the Dq curves of the measure μ based on their CCRs for different orders to link the functional protein sequences are almost identical if q 〉 0. Finally, the Ca curves of all linked functional proteins resemble a classical phase transition at a critical point.
喻祖国肖前军石龙余君武Vo Anh
共1页<1>
聚类工具0