http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
72.5kV GIS 전력 장비의 KEPCO 기준 내진 및 응력 해석
이재환,김영중,김소울,방명석 한국전산구조공학회 2017 한국전산구조공학회논문집 Vol.30 No.3
High voltage electric power transmitter GIS(Gas Insulated Switchgear) above 72.5kV needs to satisfy domestic Korean peninsular standard(ES-6110-0002) in KEPCO with respect to normal and special operation conditions which include internal gas pressure, dead weight, wind and seismic load. Some other requirements not described in Korean standard can be applied from other international standards such as IEC(International Electronical Committee) 62271-203 and 62271-207. The GIS is a kind of pressure vessel structure made of aluminum and filled with SF6 gas of internal pressure 0.4~0.5MPa. Finite element analysis of GIS is performed with such operational loads including seismic loading and the stability and reliability is determined according to ASME BPVC(Boiler and Pressure Vessel Code) SEC. VIII standard where the allowable stress level of the pressure vessel is suggested. The result shows that the stress of GIS is satisfied the allowable stress level and the safety factor is about 2.3 for Korean peninsular standard.
Role of echocardiography in clinical hypertension
이재환,박재형 대한고혈압학회 2015 Clinical Hypertension Vol.21 No.8
Hypertension is amajorand correctable cardiovascular risk factor. The correct diagnosisofhypertension andprecise assessment of cardiovascular risk are essential to give proper treatment inpatientswithhypertension. Althoughechocardiography is the second-line study in the evaluationofhypertensivepatients, it givesmany clues suggestingbadprognosis associated with hypertension, including increased left ventricular (LV) mass, decreasedLV systolic function, impaired LV diastolic function, and increased left atrial size anddecreased function. Alongwith conventional echocardiographic methods, tissueDoppler imaging, three-dimensional echocardiography, and strain echocardiography arenewer echocardiographic modalities inthe evaluation of hypertensive patients in the current echocardiographic laboratories.Understandingconventional andnewer echocardiographicparameters is important inthediagnosis andassessmentof cardiovascular risk inhypertensivepatients.