http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박종호,이성노,이정민,이택상,신완순 충남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.14 No.2
Theoretical analysis, design and evaluation of a supersonic cold-flow system were conducted. It is designed to study of jet-vane for Thust Vector Control system, but a design process is similar general that of supersonic cold-flow system. The nozzle for this system was designed same exit Mach number as that of real rocket motor, because the jet boundary of designed nozzle approximated to real jet boundary very closely. The working gas is air exit Mach No. is 2.88, and nozzle chamber volume is 1.5ℓ. From the result, proper test time is about 0.3 seconds, low pressure chamber pressure and the measured axial thrust are appeared to 83% and 83.7% of the theoretical data respectively. It is due to pressure loss in sudden divergent-convergent section.
박상기,임경택,이동하,김택현,김종태 朝鮮大學校 機械技術硏究所 1999 機械技術硏究 Vol.2 No.2
In this study, the mode shape of infinite fluid loaded plate is examined. The stiffeners are assumed to be equally spaced and exert only force on the Plate. The response of a fluid loaded ㄷ-type stiffened plate to a convected harmonic pressure and the far field radiation Produced by a point force excitation have been found by using Fourier transforms, a method which is particularly useful when fluid loading is included. At low and high frequencies the far field Pressure for a point excited stiffened plate is dominated by the fluid properties and the properties of the plate at the point of excitation. Mode in the far field pressure is found at the given direction of scattering frequencies, and in these frequencies the stationary phase wave frequencies are found to coincide with the free wave propagation constants for the stiffened plate. Also, the variation in the modes of the sound pressure level is increased with the increases of the bay space and in the bay area
박일혁,김종택 師範大學 體育硏究所 1993 서울大學校 體育硏究所論集 Vol.14 No.1
The purpose of this study was to investigate the relationship between physical fitness and basketball skill for the application and the usefulness of canonical correlation analysis in the study of physical education and exercise science. The subjects participated in this study were 46 male students of middle school in Seoul. The physical fitness factors(1,000m run, sit-up, standing long jump. 100m dash) and the basketball skill factors(shoot, pass, driddle) were measured and analyzed by using simple, multiple, and canonical correlation. The results were as follows; 1) The simple correlation between physical fistness factors and basketball skill factors were relatively high(0.4546∼0.7825) in level of significance 0.01, except between sit-up and the others. 2) The multiple correlation between physical fistness and basketball skill were 0.6746 and 0.6590 in level of significance 0.01. 3) Two significance canonical correlation(0.73, 0.43) were found between physical fistness and basketball skill. 4) Redunbancy index, one of the canonical correlation measures and the amount of variance in one set of variables explained by a linear composite of the other set of variables, were lower(0.3838, 0.3177) than simple correlation(0.6067) and R squres in multiple correlation(0.455, 0.434)
원적외선 방사체와 전이금속 산화물과의 관계에 관한 연구
박종옥,신현택 국립경상대학교 공과대학 부설 첨단소재연구소 1992 尖端素材 Vol.2 No.-
The purpose of this investigation was to prepare high efficiency far infrared radiant by cordierite, clay and ceramics made from mixture of several kinds of transition metal oxide. In this paper, interrelation of emissivity with emission energy acording to temperature in the range of 2.5μm to 25μm, after the transition element oxides of first grade were molded in press then they were calcinated 1230℃, and they were used as sample. The best of emissivity composition was cordierite 55weight percent, clay 30∼35 weight percent and transition metal oxides 15weight percent.
박영택,서용성,김종일 成均館大學校 科學技術硏究所 1994 論文集 Vol.45 No.1
Data on nearly one hundred thousand of Korean quality circles, registered with Korean standard association, are classified by regional groups, size, and industry. The classified data are analyzed in order to investigate the actual state of quality circles. Some international comparisons such as managerial objectives for introducing qulaity circles are also included.