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Multi-Agent System을 이용한 배전계통 자율 적응 최적 보호 시스템
鄭廣鎬,崔勉松,李承宰 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-
The topology of the power distribution network with protection scheme using over current relay is changed frequently because of load change, maintenance, mending and so on, but the setting values of protective devices are maximum values to ignore load and topology changes of the distribution network. Therefore the protection system can't isolate the light fault from distribution system. Currently, multi-agent system is focused one's attention on the world. And also the protective device is made by digital component and it has communication ability through the influence of communication technology. Because of these reasons, "an adaptive optimal protection of a distribution system network using multi-agent system" is proposed to apply multi agent system for automatic operation of protective system in this paper. The characteristic of multi-agent system has autonomy that is self-start ability and intelligence, with own knowledge, reasoning and judging ability. The agent works together to achieve a global goal, in which case each agent does the given job only. A protective agent of the proposed system has two autonomous functions with basic the protective function. One is the detecting function of network change. The other is the resetting function for optimal protection of a distribution system by coordinating with neighbor agents. When the fault is detected on network, agents isolate fault from network, then it sets parameters to new operation conditions by collaborating with other device agents. This system has adaptive protection with optimization "Protectability" applying protection. It is the "Protectability" concept for evaluation of protection system to describe how the system is well protection by an index numerical value. This system can operate optimal protection, because it detects adequate parameter by optimal method based on collaboration with neighbor agent. The purpose of proposed paper is development of system which has automatic detection of network change and rapidly automatic adaptation against network change with optimal method to set adequate parameter for complete protection.
멀티에이전트 시스템을 이용한 배전 계통의 새로운 복구 지수 평가 방법
鄭廣鎬,崔勉松,李承宰 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-
복구 계획은 배전 계통 운영에서 가장 중요한 일 중 하나이다. 본 논문에서는 배전계통의 복구를 멀티에이전트 시스템을 이용하여 계획하는 것을 제안한다. 본 논문에서 제안하는 시스템에서 사용되는 모든 보호기기는 자율성과 통신 능력이 있는 에이전트로 개발되었다. 보호기기 에이전트는 이웃 에이전트와 통신을 통해서 스스로 복구 지수를 계산하는 능력이 있다. 본 논문에서 제안한 알고리즘의 우수성과 효율성을 입증하기 위해서 간단한 배전계통에 적용하여 사례연구를 하였다.
RTDS를 이용한 IEC61850 기반 Merging Unit 통신 테스트 시스템 구축에 관한 연구
홍준호(Jung-ho Hong),최면송(Myeon-song Choi),이승재(Seung-jae Lee),임성정(Seong-jeong Rim),박동호(Dong-ho Park) 대한전기학회 2008 대한전기학회 학술대회 논문집 Vol.2008 No.11
병합장치(merging unit: MU)는 변류기(CT)와 변성기(VT)로부터 계측된 선류와 전압을 이더넷을 통해 샘플값(sampled value: SV) 메시지를 전송하는 IED이다. 본 논문에서는 병합장치(MU)의 통신 성능 테스트하기 위한 시스템을 구축하는 방법을 제시하였다. RTDS를 이용하여 계통을 모의하고 샘플값 메시지를 지원하는 과전류계전(OCR) IED를 구축 한 후 계통에 모의 고장을 통해 CB를 동작시킴으로서 성능을 확인하였다. 또한 상용 IED를 연결하여 CB 동작 테스트를 통해 구축한 통신 테스트 시스템의 상호운용성을 확인하였다.
( Myeon Woo Chung ),( Syrie Bang ),( Sun Kyung Jin ),( Sun Wook Woo ),( Yoon Jung Lee ),( Young Sik Kim ),( Jong Keuk Lee ),( Sung Ho Lee ),( Hye Joo Chung ),( Jae Sook Roh ) 한국응용약물학회 2007 Biomolecules & Therapeutics(구 응용약물학회지) Vol.15 No.3
Rapid advances in pharmacogenomic research have provided important information to improve drug selection, to maximize drug efficacy, and to minimize drug adverse reaction. The SNPs that are the most abundant type of genetic variants have been proven as valid biomarkers to give information on the prediction of pharmacokinetic/pharmacodynamic properties of drugs based on genotype. In order to elucidate a correlation between SNPs of calcium channel encoding gene and adverse reactions of calcium channel blockers, we investigated SNPs in CACNA1C gene known as a binding site of calcium channel blocker. 96 patients with hypertension who had taken or are taking an antihypertensive drug, 1,4-dihydropyridine (DHP) were included for analysis. These patients were composed of 47 patients with adverse drug reactions (ADR) such as edema from calcium channel blockers and 49 patients without ADR as a control group. The exons encoding the drug binding sites were amplified by PCR using specific primers, and SNPs were analyzed by direct sequencing. We found that there was no SNP in the exons encoding DHP binding site, but four novel SNPs in the exon-intron junction region. However, four novel SNPs were not associated with the ADR of calcium channel blockers. In conclusion, this study showed that ADR from calcium channel blockers may not be caused by SNPs of the binding sites of calcium channel blockers in CACNA1C gene.
A Service Restoration Algorithm for Power Distribution Networks Applying the Multi-Agent System
Jung Kwang-Ho,Cho Myeon-Song,Lee Seung-Jae,Lim Seong-Ll The Korean Institute of Electrical Engineers 2005 KIEE International Transactions on Power Engineeri Vol.a5 No.2
Service restoration is one of the most important missions in distribution system operation. This paper proposes a multi-agent system approach to distribution system restoration. Every relay is developed as an agent by adding its own intelligent, self-tuning and communication ability. The relay agent independently calculates and corrects its restoration index through communication with neighboring agents and its own intelligence. The proposed algorithm is applied to a simple network to demonstrate its soundness and effectiveness.
Chung, Myeon-Woo,Bang, Sy-Rie,Jin, Sun-Kyung,Woo, Sun-Wook,Lee, Yoon-Jung,Kim, Young-Sik,Lee, Jong-Keuk,Lee, Sung-Ho,Roh, Jae-Sook,Chung, Hye-Joo The Korean Society of Applied Pharmacology 2007 Biomolecules & Therapeutics(구 응용약물학회지) Vol. No.
Rapid advances in pharmacogenomic research have provided important information to improve drug selection, to maximize drug efficacy, and to minimize drug adverse reaction. The SNPs that are the most abundant type of genetic variants have been proven as valid biomarkers to give information on the prediction of pharmacokinetic/pharmacodynamic properties of drugs based on genotype. In order to elucidate a correlation between SNPs of calcium channel encoding gene and adverse reactions of calcium channel blockers, we investigated SNPs in CACNA1C gene known as a binding site of calcium channel blocker. 96 patients with hypertension who had taken or are taking an antihypertensive drug, 1,4-dihydropyridine (DHP) were included for analysis. These patients were composed of 47 patients with adverse drug reactions (ADR) such as edema from calcium channel blockers and 49 patients without ADR as a control group. The exons encoding the drug binding sites were amplified by PCR using specific primers, and SNPs were analyzed by direct sequencing. We found that there was no SNP in the exons encoding DHP binding site, but four novel SNPs in the exon-intron junction region. However, four novel SNPs were not associated with the ADR of calcium channel blockers. In conclusion, this study showed that ADR from calcium channel blockers may not be caused by SNPs of the binding sites of calcium channel blockers in CACNA1C gene.
성인 천식 환자에서 체질량지수와 기도과민성 및 폐기능의 연관성
최정은 ( Jung Eun Choi ),신태림 ( Tae Rim Shin ),박상면 ( Sang Myeon Park ),김주희 ( Joo Hee Kim ),신성호 ( Sung Ho Shin ),이현영 ( Hyun Young Lee ),장주아 ( Juah Jang ),이훈구 ( Hun Gu Lee ),김철홍 ( Cheol Hong Kim ),현인규 ( In 대한천식알레르기학회 2014 Allergy Asthma & Respiratory Disease Vol.2 No.1
Purpose: Obesity is commonly regarded as a risk factor for asthma development, poor asthma control, and poor response to asthma therapy. However, its relationships are not always consistent. Gender difference has been reported to influence asthma severity and asthma control. We investigated the contribution of obesity to airway hyperresponsiveness (AHR) and lung function before and after treatment in adult asthmatics. Methods: The medical records of a total of 323 adult asthmatics were analyzed retrospectively. Asthma was diagnosed based on the positive result of methacholine bronchial provocation test (PC20≤25 mg/mL) or bronchodilator test (≥12% and 200-mL improvement in forced expiratory volume in 1 second after inhalation of a bronchodilator). Follow-up spirometry was performed in 113 patients after at least 3 months of asthma treatment with controller medication. Percent change between spirometry before and after treatment was defined as {[(value after treatment.value before treatment)/value before treatment]×100}. Body mass index (BMI, weight [kg]/height [m2]) was categorized into underweight (<18.5), normal weight (18.5.24.9), overweight (25.0.29.9), and obese (>30) according to the world health organization classification. Results: BMI did not show any significant correlation with PC20 value of methacholine provocation test and each lung function parameter before and after treatment. When we divided the study subjects according to gender and age, BMI was negatively correlated with PC20 value only in female adult asthmatics under 65 years old (r=.0.024, P=0.036). Conclusion: Obesity is positively correlated with the intensity of AHR in female adult asthmatics. Gender seems to differentially contribute to the relationship between BMI and AHR. (Allergy Asthma Respir Dis 2014;2:16-22)