http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정찬희,박인기,Jung, Chan-Hee,Park, In-Ki 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.5
In this study, the mathematical model of the underwater discharge system using a centrifugal pump was derived and the rotating speed profiles of the pump which satisfied the discharge performance requirements were obtained through the underwater discharge simulations. The simulation results showed that the dynamic characteristics of a projectile were greatly affected by the rotational speed of the pump, however, hardly by the discharge depth. It is anticipated that the simulation model can be used to derive the design parameters and analyze the performance concerning the underwater discharge system using a centrifugal pump.
정찬희,최장섭,김기언,강명구,이정준,Jung, Chan-Hee,Choi, Jang-Seob,Kim, Ki-Un,Kang, Myung-Koo,Lee, Jeong-Jun 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.2
In this study, in terms of the exercise vehicles of the weapon systems having negative buoyancy, the analysis on the operation concepts was performed and the new methods of floating to surface were proposed. In case of having negative buoyancy, the additional methods for recovering the exercise vehicle have to be considered. As parts of recovering the exercise vehicle, for floating to surface the new methods of weight discharge, weight separation and sea water discharge were proposed. The conceptual design about sea water discharge method was performed. It was confirmed that those methods could be applied to the design of the exercise vehicle having negative buoyancy.
정찬희(Chan Hee Jeong),황원희(Won Hee Hwang),홍혁기(Hyuck Ki Hong),최연식(Yeon Shik Choi),조영창(Young Chang Jo) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
This paper studied the difference between brain waves and pulse waves according to various sound sources. An experiment was conducted to find out the difference between the brain wave and the pulse wave according to the frequency of the sound source and to find out the relationship. As a result, although there are differences depending on the person, the result showed that the sound source with a lot of low frequencies maintains relatively more stability than the sound source with a lot of high frequencies.
접근성 인자가 고려된 Space Syntax 모형의 보행량 분석
정찬희(Jung Chan-Hee),최무혁(Choi Moo-Hyuck) 대한국토·도시계획학회 2010 國土計劃 Vol.45 No.5
This research aims to examine the foot traffic volume in downtown Daegu with the 'Integration' obtained through the analysis using Space Syntax. Especially, our analyze will give the weight on determinant factors that may be significant in 'integration' in order to obtain valuable meanings connected with detail in 'integration' in order to obtain valuable meaning connected with detail Purpose, improving inconsistency of Space syntax. Concretely, the south block of Gukchaebosang-street showed a high degree of 'Global integration', which was confirmed to have some meaning with foot traffic volume. And the fact that there is a great difference in street integration between the south and north based on Guchaebosang-street, explains a big difference in foot traffic volume; thus, it is expected that this could be a data for realizing the importance of street planning with high street integration henceforth. Furthermore, this research intended to confirm that the weight & virtual axial lines given based on the access number of people are influenced accessibility factors, such as department stores, and commercial district, etc. The correlation of statistical analysis becomes higher by giving weight and manipulating virtual axial line. It is expected that such a study method will be helpful to more feasible estimation of traffic volume.
한국인에서 갑상선기능에 따른 지질 , hsCRP , 허리둔부비와 같은 심혈관질환의 위험인자의 변화
정찬희(Chan Hee Jung),성기철(Ki Chul Sung),신헌섭(Hun Sub Shin),이현영(Hyun Young Lhee),박승하(Seung Ha Park),이호철(Ho Chul Lee),이은정(Eun Jung Rhee),이원영(Won Young Lee),김범수(Bum Soo Kim),강진호(Jin Ho Kang),김선우(Sun Woo Kim) 대한내과학회 2002 대한내과학회지 Vol.63 No.3
Background : Thyroid abnormalities affect a considerable portion of the population. Overt hypothyroidism is associated with an elevated risk of cardiovascular disease and adverse changes in blood lipids. Subclinical hypothyroidism is also associated with an increase risk of cardiovascular disease. So we performed the study to investigate the prevalence of overt and subclinical thyroid disorders and their association between cardiovascular risk factors. Methods : This study was performed in 66,260 subjects (43,588 men, 22,672 women ; between 20∼80 years of age, mean age 41.5±9.6). Serum free thyroxine (FT4), thyroid stimulating hormone (TSH), total cholesterol, low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C) were measured with RIA using commercial kits. High sensitivity C-reactive protein (hsCRP) were measured with nephelometry. Results : The prevalence of overt thyrotoxicosis, subclinical thyrotoxicosis, overt hypothyroidism and subclinical hypothyroidism was 5/1000 (334 subjects), 6.4/1000 (426 subjects), 1.6/1000 (108 subjects), 6.4/1000 (375 subjects) population. Mean plasma total cholesterol and LDL-C were elevated in overt hypothyroidism than normal (202.1 mg/dL and 121.8 mg/dL versus 197.1 mg/dL and 120.1 mg/dL)(p<0.05). Also in subclinical hypothyroidism, mean total cholesterol and LDL-C level were elevated compared to normal group (201.9 mg/dL and 123.7 mg/dL)(p=0.015, p=0.047). Waist-to-hip ratio (WHR) was lower in overt thyrotoxicosis and was higher in hypothyroidism. Conclusion : The prevalence of thyroid dysfunction was not significantly different from those of other countries. It was also age dependent and higher in women but it was lower than expected. Patients with hypothyroidism exhibit higher levels of waist-to-hip ratio as index of obesity. Patients with subclinical hypothyroidism exhibited increased levels of the atherogenic parameters (Total cholesterol, LDL-C). Therefore screening and treatment for subclinical hypothyroidism may be warranted due to the adverse effects on lipid metabolism.(Korean J Med 63:273-282, 2002)
정찬희(Chan-Hee Jeong),양승무(Seung-Moo Yang),손재기(Jae-gi Son),김동민(Dongmin Kim) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11
본 논문은 MLOps 에서 모델을 학습하는데 필요한 하이퍼파라미터를 최적화하는 알고리즘을 비교하였다. 최적화 알고리즘으로는 격자 탐색, 무작위 탐색, 베이지안 최적화 방법을 사용한다. 마이크로소프트의 애저 플랫폼을 이용하여 실험을 진행하였다. 각 데이터에 따른 모델 및 하이퍼파라미터를 탐색하는 방법을 비교하여 각 알고리즘 별 성능을 비교하였다.