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VS/VD 구조의 퍼지 기반 ABR 트래픽 제어에 관한 연구
박현,정광일,정명수,정경택,전병실,Park, Hyun,Jeong, Kwang-Il,Cheong, Myung-Soo,Chung, Kyung-Taek,Chon, Byoung-Sil 대한전자공학회 2002 電子工學會論文誌-TC (Telecommunications) Vol.39 No.8
본 논문에서는 퍼지이론을 기반으로하여 ATM망에서 ABR 서비스를 하는데 있어서 효과적으로 링크를 이용하기 위한 트래픽 제어 알고리즘을 제안하였다. 제안한 알고리즘은 스위치의 버퍼 사이즈에 따라서 소스 전송률을 제어하고 퍼지율을 이용하여 입력 셀 율을 제어하는 알고리즘이다. 우리는 위의 방법들로 퍼지트래픽 제어 알고리즘과 VS/VD의 ER값을 기본으로 한 퍼지 트래픽 제어기를 개발하였다. 또한 퍼지 제어규칙, max-min inferencing 방법으로 하나의 집합적인 기능을 설계하였다. In this paper, we propose an traffic control algorithm for efficient link utilization of ATM-ABR service based on fuzzy logic. The proposed algorithm, controls transmission rates of source according to switch buffer size and input cell tate by using the fuzzy rate . For this method we developed a model and algorithm of fuzzy traffic control method and fuzzy traffic controller which based on ER of VS/VD. For the fuzzy traffic controller, we also designed a membership function, fuzzy control rules, and a max-min inferencing method.
THE RELATIONSHIP BETWEEN SHORT-RANGE MOVES AND LONG-RANGE MOVES
정경택,정동호 동양대학교 산업기술연구소 2001 東洋大學校 産業技術硏究所 論文集 Vol.3 No.1
We study the relationship between short-range moves and long-range moves by considering the first bifurcation point of r as a function of m in the game of life type automata network which is the two-dimensional probabilistic automata network model whose rule consists of two subrules. The first subrule, applied synchronously, is a local transition rule of nonzero sites characterized by the interaction with a neighborhood. The second one, applied sequentially, describes the motion of nonzero sites. The second subrule has been used to model complex systems when the movement of nonzero sites plays an important role. A new parameter r is introduced to represent the rare of long-range moves. When r is equal to zero or one, the motion of the nonzero sites is, respectively, purely short-range or purely long-range. In the game of life type automata network, as r increases, the stationary density of nonzero sites follows a route to chaos through the familiar cascade of period-doubling bifurcations. The first bifurcation point of r changes with m. Both limits of r, r → 0 and r → 1, gives the m for the purely short-range moves and the purely long-range move. The models of both range moves shows the same physical nature.
The effects of the mixed movement on probabilistic automata networks
Cheong, Kyeong-T,Jeong, Dong-H 동양대학교 2000 동양대학교 논문집 Vol.6 No.1
We study two-dimensional probabilistic automata network models whose rule consists of two subrules. The first subrule, applied synchronously, is a local transition rule of nonzero sites characterized by the interaction with a neighborhood. The second one, applied sequentially, describes the motion of nonzero sites. The second subrule has been used to model complex systems when the movement of nonzero sites plays an important role. A new parameter r is introduced to represent the rate of long-range moves. When r is equal to zero or one, the motion of the nonzero sites is, respectively, purely short-range or purely long-range. In the game of life type automata network, as r increases, the stationary density of nonzero sites follows a route to chaos through the familiar cascade of period-doubling bifurcations. The first bifurcation point of r changes with m. In an automata network epidemic model exhibiting cyclic behavior, as r increases, the densities of susceptibles and infectives become oscillating through a Hopf-type bifurcation. The amplitude D of the oscillating density of susceptibles follows a simple power law with the exponent α and the critical value rc.
Hamming Distance를 이용한 확산운동의 정보이론
Cheong, Kyeong-Taik 동양대학교 1997 동양대학교 논문집 Vol.3 No.1
확산운동의 정보이론이 연구되었다 섞임정도를 나타내는 우리 모델의 변수 m은 하나의 격자변수가 행하는 tentative 움직임의 평균회수이다. Hamming distance는 격자변수들이 움직일 때 계의 섞임정도를 나타내는 좋은 측정치이다 short-range 움직임이 d-차원 격자공간에서의 확산운동이라는 사실과 마찬가지로, long-range 움직임은 무한대-차원 격자공간에서의 확산운동이다. m이 0으로 접근할 때, 계의 정보는 I는 1이 된다. 그리고 m이 무한히 커질 때, 계의 정보 I는 0으로 접근하는데, 이것은 계의 correlation이 완전히 파괴된다는 것을 의미한다. The information theory of a diffusive motion is studied. The parameter m, the degree of mixing, of the model is the average number of tentative moves per site variable. The Hamming distance is a good measure of mixing process that results from the motion of the site variables. As well as short-range moves are diffusive moves on a d-dimensional lattice, long-range moves are diffusive moves on an infinit-dimensional lattice, When m tends to zero, the information of the system I becomes the unity. When m goes to infinity, the information I approaches zero, that is, the correlation of the system is completely destroyed.
PERIOD DOUBLING BIFURCATION OF THE GAME OF LIFE TYPE AUTOMATA NETWORK
Cheong, Kyong T.,Jeong, Dong H. 동양대학교 1998 동양대학교 논문집 Vol.4 No.1
We study the "Game of life" type cellular automata with restricted long- range moves. This cellular automata has two subrules. The first subrule, applied sequentially, describes the motion of live sites. The second one, applied synchronously, is a local transition rule of live sites characterized by the interaction with a neighborhood. The new parameter LS is the maximum length of one step in the long-range moves. The motion of lives sites is restricted long-range when the length of a move is less than LS. When the motion is restricted long-range, the density of live sites exhibits a period doubling bifurcation and behaves chaotically when m and LS are large enough. The difference between two periodic densities of live sites follows a simple power law with the exponent β and the critical value mc
NUMERICAL STUDIES OF A CONTROLLNG CHAOS IN A WEAKLY PERIODICALLY EXCITED CHUA'S CIRCUITS
Cheong, Kyeong T. 東洋大學校 産業技術硏究所 2002 東洋大學校 産業技術硏究所 論文集 Vol.4 No.1
It is demonstrated by the computer simulation of differential equation that chaos can be controlled by a frequency of a weak periodic external perturbation applied in a modified Chua's circuit with a cubic Chua's resistor. The application of the weak external perturbation results in a stabilization of a chaotic attractor to stable cyclic orbits embedded within the strange attractor.
THE GAME OF LIFE TYPE AUTOMATA NETWORK WITH MOVING NONZERO SITES PERFORMING THE MIXED MOVEMENT
Cheong, Kyon-T,Jeong, Dong-H 동양대학교 1999 동양대학교 논문집 Vol.5 No.1
We consider a two-dimensional "Game of life type" automata network whose rule consists of two subrules. The first subrule, applied synchronously, is a local transition rule of nonzero sites characterized by the game of life type interaction with a larger neighborhood. The second one, applied sequentially, describes the motion of nonzero sites. The second subrule has been used to model complex systems when the movement of nonzero sites plays an important role. If the motion is long-range, the density of nonzero sites behaves chaotically when m is large enough. If the motion is short-range, the collective behavior of nonzero sites is stationary, A new parameter r is introduced to represent the rate of long-range moves. As r increases, the statinary density of nonzero sites follows a route to chaos through the familiar cascade of period-doubling bifurcations. The Feigenbaum constant δ1 of this model is compatible with the universal value δ∞.