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Bounds of correlation dimensions for snapshot attractors
장성각,이미령,이흥환 대한수학회 2004 대한수학회보 Vol.41 No.2
In this paper, we reformulate a snapshot attractor([5]), (K,{bar mu}_l) generated by a random baker's map with a sequenceof probability measures { {bar mu}_l } on K. We obtainbounds of the correlation dimensions of (K, {bar mu}_l) forall l ge 1.
Lienard 방정식의 center가 되기 위한 충분조건들에 관하여
張性珏,張鎬淑 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-
In thes paper, we give some new sufficient conditions under which Lienard equations have local centers or global centers at the origin.
포물형 편미분 방정식에 대한 Galerkin 근사법의 Algorithm들에 관하여
張性珏,李龍銖,白鮮海 嶺南大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.13 No.-
In this paper, we investigate some error estimates of Galerkin methods for parabolic partial differential equations and study algorithms which can be used in personal computers.
Chang,Sung Kag 嶺南大學校附設 基礎科學硏究所 1987 基礎科學硏究 Vol.7 No.-
This paper deals with some equivalent conditions for the hyperstability of distributed parameter systems in infinite dimensional Hilbert spaces. Similar results to those of Megan and Hiris are obtained without the assumption that the observation spaces are equal to the control spaces.
A Note on Approximate Controllability Regions under Restricted Controls in Banach Spaces
Chang, Sung-kag 東亞大學校 1986 東亞論叢 Vol.23 No.1
X와 U를 reflexive Banach 공간이라 하고 V를 U의 한 부분 집합이라 하자. 우리는 선형 제어 Model d/dxy(t)=Ay(t)+Bu(t)에서 제한된 제어 함수 u(t)∈V a.e.t [O,T]에 의해 근사 제어 가능 영역을 G(T)라 하면 다음의 정리를 얻는다. 정리 1. 명제 "V상에서 모든 O≤t≤T에 대하여 B*S*(t)Z*=O이며 Z*=O"는 O∈Int G(T)이기 위한 하나의 필요조건이다. 정리 2. V가 balanced 이고 폐볼록집합이며 O Int V이라 하자. 명제 "V상에서 ∫?? B*S*(t)Z*=O이면 Z*=O"는 O∈Int G(T)이기 위한 하나의 충분조건이다.
연변 한인 농촌마을의 공간구조특성 분석을 통한 배치계획 수립방안 - 룡정시 룡산촌을 대상으로 -
리신호 ( Shin Ho Rhee ),윤성수 ( Seong Soo Yoon ),서교 ( Kyo Suh ),장성각 ( Cheng Gang Zhang ) 한국농촌계획학회 2005 농촌계획 Vol.11 No.1
Practically, it is very hard to investigate the rural villages in North Korea. The Korean rural village in Yanbian is proximate from North Korea and most of inhabitants of the village have been emigrated from Hamgyeong-Do and Pyeongan-Do. In this sense, it can be meaningful to study Korean villages in Yanbian is an alternative approach toward researches of North Korean rural villages. In this study, spatial characteristics of the Ryongsan village, Ryongjeong city was studied as a representative korean rural village in Yanbian. The Ryongsan village has been formed based on the traditional culture and custom of North Korea. The case of planning and design is provided through drawings of components for planning of rural villages based on the results of spatial characteristics analysis.