http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김홍근(Hongkeun Kim),김진구(Jin-Goo Kim),김용숙(Yong Suk Kim) 한국재활심리학회 2011 재활심리연구 Vol.18 No.2
본 연구의 목적은 학습클리닉에 의뢰된 아동들의 인지적 특성을 알아보는 것이었다. 이를 위해 학습클리닉 아동군과 일반 아동군에게 아동용 Wechsler 지능검사 와 아동용 Kims 전두엽-관리기능 신경심리검사 를 실시하였다. 주요 결과는 다음 세 가지였다. 첫째 학습클리닉 아동군은 일반지능에 비해 관리기능(executive function)이 유의하게 낮았다. 이 결과는 자기조절학습 능력이 낮은 아동들이 학습클리닉에 많이 의뢰되고 있음을 제시한다. 둘째 학습클리닉 아동군은 일반지능수준에서 예견되는 것에 비해 학업성취도가 유의하게 낮았다. 이 결과는 일반지능에 비해 관리기능이 상대적으로 낮은 것에 기인할 수 있다. 셋째 학습클리닉 아동군과 일반 아동군 공히 관리기능은 일반지능에 비해 학업성취도의 보다 강력한 예언변인이었다. 결론적으로 학습클리닉에 의뢰되는 아동들 중 상당수가 관리기능에 약점이 있으며 이들의 학업성취도는 지능수준에서 예견되는 것에 비해 낮은 경향이 있다. 그러므로 학습클리닉 아동들의 심리평가에는 관리기능의 점검이 중요하다. 또한 이 아동들의 중재 프로그램에서도 관리기능에 초점을 맞춘 내용이 필요하다. This study investigated cognitive functions of children referred to a learning clinic. To this end we administered K-WAIS-Ⅲ and Kims Frontal-Executive Function Test for Children to a sample of learning-clinic children and a sample of control children. There were three main findings. First learning-clinic children had significantly lower executive function relative to their general intelligence. This finding suggests that many learning-clinic children have weak self-regulated learning ability. Second learning-clinic children showed significantly lower academic achievement relative to their general intelligence. This finding indicates that executive function has significant impact on academic achievement. Third in both learning-clinic and control children executive function was a more powerful predictor of academic achievement than general intelligence. In conclusion many learning-clinic children have weak executive function and their academic achievement tends to be low relative to their general intelligence. Thus executive function should be given more emphasis in psychological assessment as well as intervention programs for these children.
Kim, Hongkeun,Kwon, Ji-Wook,Park, Bong Seok 제어로봇시스템학회 2014 Transaction on control, automation and systems eng Vol.12 No.4
This paper studies the design problem of a controller to achieve an asymptotic consensus for a class of non-uniform rank linear systems. The interconnection topology for the N non-uniform rank systems is assumed to be modeled by a time-varying graph that switches in a finite set of connected and undirected graphs and has a non-vanishing dwell time. Under these conditions, we propose a controller for the asymptotic consensus of the N systems and provide a closed formula for an agreed trajectory that in fact indicates the attainment of average consensus. The controller is implemented through the backstepping and high-gain observer techniques, and uses only relative output measurements from the neighboring systems for the purpose of feedback. The idea behind this implementation is that the output feedback controller implemented in this way can make the norm of the state of the closed-loop system arbitrary small within any given dwell time, even for non-uniform rank systems.
Consensus of Linear Multi-Agent Systems on the Desored Waveform
Hongkeun Kim(김홍근),Seongjun Kim(김성준),Hyungbo Shim(심형보),Jin Heon Seo(서진헌),Juhoon Back(백주훈) 제어로봇시스템학회 2009 제어로봇시스템학회 국내학술대회 논문집 Vol.2009 No.9
The main purpose of this paper is to achieve the consensus for a class of multi-agent systems of which identical linear dynamics are of any order and do not have any mode of the desired waveform, I.e., the type of signals that are agreed on among the agent. The controller. that is obtained from the internal model principle. uses only the output information of itself and its neighboring agents. The internal model contains all the mode of the desired waveform. By embedding the internal model into the controller, it is shown that the consensus on the desired waveform is achievable. Finally an example shows the effectiveness of the proposed method.
Hongkeun Kim 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.11
A parallel feedforward compensator V is a dynamical systems, attached to the given plant P in parallel. It is usually devised so that their parallel interconnection P +V possesses some desired properties that cannot be achieved via feedback control, e.g., passivity and the stability of zero dynamics. In this paper, we consider an uncertain MIMO linear plant P that have the vector relative degree {1, ..., 1}. In particular, we do not restrict P to be of minimum phase and thus, it can be of non-minimum phase. For such P, we design V so that P +V is of minimum phase while the associated vector relative degree remains unchanged. In other words, the design allows us to robustly stabilize the zero dynamics of the system. The proposed design is based on an output feedback controller that stabilizes an auxiliary system, derived from the original plant P. The design is also applicable to the robust and adaptive stabilization problem of uncertain systems by output feedback. And in this context, we propose a robust output feedback controller for P, based on the designed V. Some examples, including F-16 aircraft, are provided to demonstrate the effectiveness of the proposed results.
Output Consensus of Heterogeneous Uncertain Linear Multi-Agent Systems
Hongkeun Kim,Hyungbo Shim,Jin Heon Seo IEEE 2011 IEEE transactions on automatic control Vol.56 No.1
<P>This technical note studies the output consensus problem for a class of heterogeneous uncertain linear multi-agent systems. All the agents can be of any order (which might widely differ among the agents) and possess parametric uncertainties that range over an arbitrarily large compact set. The controller uses only the output information of the plant; moreover, the delivered information throughout the communication network is also restricted to the output of each agent. Based on the output regulation theory, it is shown that the output consensus is reached if the (state) consensus is achieved within the internal models among the agent's controllers (even though the plant's outputs, rather than the internal model's outputs, are communicated). The internal models can be designed and embedded into the controller, which provides considerable flexibility to designers in terms of the type of signals that are agreed on among the agents.</P>
Hongkeun Kim,Ji-Wook Kwon,Bong Seok Park 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
This paper studies the design problem of a controller to achieve a consensus of a group of N identical and high-order linear systems that possibly have non-uniform ranks but do not have finite zeros. The local interactions among the N systems are modeled by a switching graph that ranges over a finite set of connected and undirected graphs and has a non-vanishing dwell time. Under these conditions, we propose a controller for the consensus of the N systems which uses only relative output measurements from the neighboring systems for the purpose of feedback.
Kim, Daewon,Kim, Weon-Guk,Jin, Ik Kyeong,Park, Hongkeun,Im, Sung-Gap,Choi, Yang-Kyu unknown 2019 Nano energy Vol.62 No.-
<P><B>Abstract</B></P> <P>A triboelectric nanogenerator (TENG) with an ultra-thin thickness of a tribo-dielectric layer (TDL) composed of poly heptadecafluorodecyl methacrylate (PFDMA) is demonstrated. The thickness of the PFDMA, which serves as the TDL, was precisely controlled within a range of 0.5 μm–12 μm through the use of initiated-chemical vapor deposition (i-CVD). The relationship between the TDL thickness and the output characteristics was analyzed by demonstrating the ultra-thin TDL thickness, which is the thinnest thickness polymer TDL ever reported. As the TDL thickness is increased, the short-circuit current (<I>I</I> <SUB>SC</SUB>) and the transferred charge (<I>Q</I> <SUB>TR</SUB>) both increase while the open-circuit voltage (<I>V</I> <SUB>OC</SUB>) remains constant. Because a TENG with the ultra-thin TDL shows a different tendency between <I>Q</I> <SUB>TR</SUB> and the total charge (<I>Q</I> <SUB>TDL</SUB>) in the TDL, modeling is also carried out to gain a comprehensive understanding of the TDL thickness and output characteristics.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ultra-thin tribo dielectric layer (TDL) fabricated by using initiate chemical deposition. </LI> <LI> The modeling about relation between the TDL thickness and output characteristics is reinforced and verified. </LI> <LI> Through ultra-thin TDL, bulk distribution of triboelectric charge studied in-depth. </LI> <LI> The characteristics of PFDMA as TDL are analyzed. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Passification of SISO LTI Systems Through a Stable Feedforward Compensator
Seongjun Kim,Hongkeun Kim,Juhoon Back,Hyungbo Shim,Jin Heon Seo 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
The paper addresses the design problem of a parallel feedforward compensator for a class of SISO LTI systems, that renders the augmented system to be of minimum phase and have relative degree one. The plant can be of nonminimum phase and/or have high relative degree. Under these setups, we derive an existence condition of a stable feedforward compensator and propose a design algorithm based on the simultaneous stabilization of two systems. An illustrative example is also given.