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Design of T-S(Takagi-Sugeno) Fuzzy Control Systems Under the Bound on the Output Energy
Kim, Kwang-Tae,Joh, Joog-Seon,Kwon, Woo-Hyen Institute of Control 1999 Transaction on control, automation and systems eng Vol.1 No.1
This paper presents a new T-S(Tae-Sugeno) fuzzy controller design method satisfying the output energy bound. Maximum output energy via a quadratic Lyapunov function to obtain the bound on output energy is derived. LMI(Linear Matrix Inequality) problems which satisfy an output energy bound for both of the continuous-time and discrete-time T-S fuzzy control system are also derived. Solving these LMIs simultaneously, we find a common symmetric positive definite matrix P which guarantees the global asymptotic stability of the system and stable feedback gains K's satisfying the output energy bound. A simple example demonstrates validity of the proposed design method.
이광용 ( Kwang Yong Lee ),유승흠 ( Seoung Hum Yu ),손태용 ( Tae Yong Sohn ) 한국병원경영학회 1999 병원경영학회지 Vol.4 No.2
The purpose of this study is to identify influencing factors for successful introduction, implementation and management of HMRPS through assessment of the employees attitude toward HMRPS in technical, administrative, and organization behavioral areas. Data were collected from 157 HMRPS employee members' self-reporting questionnaire in three university hospitals in the city of Seoul and Kyonggi Province from November 5 to November 10, 1997. Relevant literature on industry company MPR system theory was reviewed to develop the theoretical framework. The results were as follows : The employee's recognition of tangible benefit were more significantly influenced success than intangible benefit for successful operation relating the HMRPS. Concerning the employee's recognition of the successful HMRPS and the factor of influenced success was significantly positive correlation between tangible and intangible benefits and success factor in technical, administrative, and organizational behavior area. This study showed that major factor affecting the employee's recognition of tangible and intangible benefit for successful HMRPS. For tangible benefits : Success factors in the technical areas were quality of the data and information, efficiency of inventory management and rescheduling of operation plan. Success factors in the administrative areas were : role of top management. Success factors in the organization behavioral areas were ; simplicity of the HMRPS, human resistance to change. For intangible benefits : Success factors in the organization behavioral areas were ; user involvement, simplicity of HMRPS, human resistance to change. Furthermore as the exact evaluation of successful factors of HMRPS implement is needed, research for the development of systemic variables of physical distribution system control, methods, capacity of system, duration and other environment in many of 30 hospitals or more, and for the empirical study for HMRPS.
Thermoelectric Properties of Bi2Te3 Film Processed by Electrodeposition
Lee, Kwang-Yong,Oh, Tae-Sung Research Institute of Science and Technology HONGI 2005 Hongik Journal of Science and Technology Vol.9 No.-
Thermoelectric properties of the electrodeposited Bi_(2)Te_(3) films have been investigated. Bi_(2)Te_(3) plating solution of 20 mM concentration was prepared by dissolving Bi_(2)O_(3) and TeO_(2) into 1M HNO_(3). Thermoelectric properties of the electroplated Bi_(2)Te_(3) films were changed with the film thickness, and the 40 μm-thick film exhibited Seebeck coefficient of -66 μV/K, electrical resistivity of 2.4 mΩ-cm, and power factor of 1.75x10^(-4) W/K^(2)-m. Using multilayer overhang process, the photoresist pattern to form thermoelectric legs of 30 μm depth and 100 μm diameter was successfully fabricated.
교통사고 후 신체 손상 환자의 외상후 스트레스장애에 대한 연구
강영수,김동인,이선미,김 임,김태형,은헌정 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.4
연구 목적 : 임상가를 위한 외상후스트레스장애 척도를 이용하여 교통 사고 후 신체 손상 환자의 외상후스트레스장애의 발병률을 알아보고, 사회인구학적 변인들, 손상 심각도, 불안, 우울과 외상후스트레스장애와의 상호관련성을 고찰하고자 하였다. 방 법 : 104명의 교통사고 환자들을 대상으로 , 자기 보고형인 사고 후 정신 건강에 관한 설문지와 외상후스트레스장애를 진단하기 위해서 임상가를 위한 외상후스트레스장애 척도를 이용하여 면담을 실시하였으며, 손상 심각도 척도를 이용하여 신체 손상의 정도를 측정하였다. 결 과 : 외상후스트레스장애의 발병률은 61.5%이었으며, 사회인구학적 변인들과 손상 심각도 점수에서는 외상후스트레스장애군과 비 외상후스트레스장애군이 유의한 차이를 나타내지 않았다. 그러나 외상후스트레스장애 군에 속한 사람들이 사고 당시에 사망자나 부상자를 목격한 경우가 의미있게 많았고(χ²=8.48, p<0.05). Beck의 우울점수가 외상후스트레스장애군에서 유의한 증가를 보였다.(t=5.03, p<0.05). 결 론 : 교통사고 후 외상후스트레스장애의 발병률은 매우 높았고, 두 집단 모두가 정상인 보다 훨씬 더 높은 불안과 우울을 보고하고 있다. 이와 함께 연구 결과는 상황에서 사망자와 부상자의 목격시 외상후스트레스장애로 발병하게 하는 위험 요인 중 하나 일 수 있다. Objectives : the authors attempted to estimate the incidence of posttraumatic stress disorder (PTSD) and the differences of sociodemographical feature, injury severity, depression and anxiety between PTSD and non-PTSD groups after motor vehicle accident. Methods : The subjects were 104 patients who had undergone motor vehicle accidents, and been hospitalized to orthopedic surgery hospitals. We administered them clinician-administered PTSD scale(CAPS) for diagnosing PTSD, injury severity scale(ISS) for identifying their physical injury, self-reported questionnaire made to identify socioepidemographic data, Beck Depression Inventory(BDI) for measuring depression, and State Trait Anxiety Inventory Ⅰ,Ⅱ(STAI-Ⅰ,Ⅱ) for measuring anxiety. Results : The incidence of PTSD in subjects was 61.5%. Most of sociodemographic factors were not different between PTSD and non-PTSD groups. Only there were significant differences between PTSD group and non-PTSD group on the cases that observed the dead or the wounded at the scene of motor vehicle accident(χ²=8.478, p<0.05) and BDI(t=5.03, p<0.05). Conclusion : These results indicate that prevalence of PTSD is higher after motor vehicle accident and both of the two groups report much higher depression and anxiety than normal population. In addition, the results of this study show that the observation of dead or wounded at accident situation can be one of risk factors to precipitate PTSD.
규칙적인 신체활동이 청소년의 생활 스트레스에 미치는 영향
길태오,구광수,이강헌 창원대학교 체육과학연구소 2004 경남 체육연구 Vol.9 No.1
본 연구는 규칙적인 신체활동이 청소년의 생활 스트레스에 미치는 영향을 규명하여, 청소년의 생활 스트레스 관리에 규칙적인 신체활동의 긍정적인 효과를 인식시키려는 목적으로 실시하였다. 연구대상은 유층집락 무선표집방법(stratified cluster random sampling method)을 이용하여 운동참여 집단(중학생 120명, 고등학생 93명) 213명과 비참여 집단(중학생 139명, 고등학생 95명) 234명, 총 447명을 표집하였다. 청소년의 생활 스트레스를 측정하기 위한 검사지로는 최해림(1986)의 생활 스트레스 척도를 이용하였고, 생활 스트레스의 영역은 학교생활, 가정생활, 대인관계의 3가지 영역으로 구분하였다. 수집된 자료는 신체활동 참여여부와 학교급별로 평균과 표준편차를 산출한 후 도표화하고, 평균차 검증을 위하여 이원변량분석과 상호작용효과 검증을 실시하여 분석해 본 결과 다음과 같은 결론을 얻었다. 첫째, 규칙적으로 신체활동에 참여하는 학생들은 신체활동을 실시하지 않는 학생들보다 생활 스트레스의 전 영역(학교생활, 가정생활, 대인관계 스트레스)에서 더 긍정적인 반응을 나타내었다. 둘째, 규칙적으로 신체활동에 참여하지 않는 학생들의 경우 가정생활 스트레스는 중학생이 고등학생보다 더 높은 수준이었고, 반면에 대인관계 스트레스는 고등학생이 중학생보다 더 높은 수준이었다.
崔光泰,韓相政 대구효성가톨릭대학교 1977 연구논문집 Vol.19 No.1
As a fundamental study of breeding procedures, several important characters and the variation in the interrelationship among these characters were studied. It was conducted with M₂rice mutants induced from mother variety, Poongkwang irradiated with -ray. Number of days from seeding to heading showed the higher value in heritability, while the value deceased with number of panicles, number of grains per panicle, and culm length, in order. Highly positive correlation between culm length and number of grains per panicle was found.
김광태,손유익 계명대학교 산업기술연구소 1993 産業技術硏究所 論文報告集 Vol.16 No.1
A DRC (design rule checker) algorithm employing λ-based design rule has been developed for CMOS circuits. The bit-language was used for its implementation program. Also, the λ-based DRC algorithm has an ability to indicate error coordinates so as to simplify the design procedure.
PID제어를 이용한 Chamber의 냉방제어 시뮬레이션
정태상,황광성,김태규,김유영,정기환 진주산업대학교 산업과학기술연구소 2003 산업과학기술연구소보 Vol.- No.10
A cooling system of chamber is universally appliable with simple ON-OFF control algorithm. It has such disadvantages as having a delay for response time. To solve the above problem, we propose establishing the mathematical model of cooling system for chamber, simulating it with PID control algorithm and evaluating performance tests for control algorithm respectively.