第
38
卷第
5
期
2008
年
9
月
河南大学学报(自然科学版)
Journal
of
Henan
University
(Natural
Science)
Síudy
on
Coherence
and
Turbulence
of
CML
Models
L1
U
Zhao-cun
1
•
2
,
]I
N
Sheng
2
,
QIN
Yao-chen
1
善
,
LI
Xiao-jian
1
Vo
l.
38 NO.5
Sep. 2008
(1
.5
ι
hool
0/
Environment
and
Planning
,
Henan
University
,
Henan
Kai/eng
475001 ,
China;
2.
School
0/
Civil
Engineering
,
DaLian
University
0/
Technology
,
Liaoning
DaLian
116024 ,
China)
Abstract:
A class of coupled
map
lattice
(CML)
models
was
developed
to
study
evolutional
phenomena
with
interaction
between
convective
and
diffusive
mechanism
in
different
coupling
manners.
The
models are initiated,
based
on
the
analogy
between
the
one dimensional
(1
D)
partial
differential
equation
(PDE)
and
the
2D one, for
the
purpose
of
extension
to
describe
convection
and
diffusion
jointly.
Numerical
results
show
that
the
models
manifest
abundant
spatiotemporal
patterns.
In
addition
,
the
models
are feasible
to
demonstrate
physical
layered
coupling
conv
巳
niently
to be used to
analyse
initiative
and
driven
coupled
system.
In
spatial
behaviors, it
can
function
to
illustrate
mechanism
of physical
stochastic
exchange
not
only
for
weakly
coupled
but
also for
strongly
coupled
system;
in
temporal
behaviors
, it can
function
to
illustrate
mechanism
of
stochastic
phenomena.
The
functions of
physical
factors
such
as
stochastic
coupling,
phase
and
amplitude
are
analyzed,
the
effects of local coupling modes
and
phase
transition
manners
on
system's
character
are
studied.
Finally,
the
evolutional laws
of
coherent
structure
and
turbulent
phase
of models
are
discussed.
Key
words:
CML
model;
stochastic
m
巳
chanism;
coherence;
turbulence
CLC
number:019;
X24;
TV131.
22
Doc
ument
Code: A
Article
10:
1003-4978(2008)05
一
0483
一
08
一类
CML
模型的拟序和浦流性态研究
刘兆存1.
2
全生
2
秦耀辰李小建
1
O.
河南大学环境与规划学院,河南开封
475001;
2
,大连理工大学土木学院,辽宁大连
116024)
摘
要:提出了一类系统的祸合映象格点
(CM
L)模型,和现有的同类模型相比,它具有适宜描述物理分层精合的
功能,从而便于分析主动、从功的捐合系统
B
空间上,它具有描述物理随机交换机制的功能,它既适宜弱稿合也适
宜于强搞合系统
E
时间上,它具有描述随机现象机制的功能曰我们分析了物理因子如随机搞合、相位、振幅等所起
的作用,研究了局部搞合方式和相变形式对于系统性态的影响,计算了刻画系统性态的
些定量指标,并对于系统
的揣流态的演化规律进行了分析
o
关键词
:CML
模型;随机机制;拟序;揣流
o Introduction
There
has
been
much
interest
in
the
study
of
the
dynamics
of
chaotic
systems
in
last
decades.
The
study
of
large
assemblies
of
chaotic
elements
that
can
spontaneously
evolve
to
a
state
of
large
scale
synchronization
and
form
different
patterns
is
important
not
only
for
understanding
nonlinear
dynamical
systems
with
degrees
of
freedom
,
but
also
from
the
viewpoint
of
potential
application
in
evolutionary
dynamics
,
such
as
turbulence.
The
relatively
simple
coupled
map
lattice
(CML)
model-a
discrete
space
,
Received
date:
2008-05-16
Foundation
item:
Project
supported
by
the
National
Natural
Science
Foundation
of
China
(40535025)
Biography: Liu
Zhao-cun
(1
968
一),
male , native of
Henan
province,
associate
professor
,
Ph.
D.
E-mail:
liuzcl7@
yahoo.
co
口
1.
cn
祷
Conesponding
author:ginyc@henu.
edu. cn