http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
수중에 노출된 농업용 콘크리트 구조물 보수용 라텍스개질 모르타르의 적정 배합비 도출
원종필,이재영,박찬기,이상우,김완영,Won, Jong-Pil,Lee, Jae-Young,Park, Chan-Gi,Lee, Sang-Woo,Kim, Wan-Young 한국농공학회 2007 한국농공학회논문집 Vol.49 No.3
The purpose of this study was to determine the optimum mix proportion of latex modified mortar for agricultural underwater concrete structures repair. The experimental variables included a latex and antiwashout admixture amount, binder-sand ratio, water-binder ratio. This study were evaluated a repair performance and environment effect of latex modified repair mortar for agricultural underwater concrete structures. The pH test was conducted to evaluated the environmental effect and the flow test was peformed to evaluated the workability. Also, compressive, flexural and bond tests were conducted. Test results show that the optimum mix proportion of latex modified repair mortar for agricultural underwater concrete structures, was achieved by 1:1.5 binder-sand ratio, 5% latex ratio (weight of binder), 1.3% antiwashout admixture ratio (weight of binder), 0.33 water-binder ratio and 10% silica lune replacement ratio (weight of cement). The environmental effect and repair performance of optimum mix proportion satisfied all target performance.
기계화 경작로 콘크리트 포장의 균열제어 및 내구성 향상을 위한 폴리프로필렌섬유의 효과
원종필,전우정,박찬기,정인수 한국농공학회 2002 한국농공학회논문집 Vol.44 No.1
Plastic shrinkage cracking is a major concern for mortar and concrete, especially for flat structural surfaces such as pavement, slabs for industrial factories and walls. One of the method to reduced the adverse effects of shrinkage cracking is to reinforced concrete with randomly distributed fibers. The contribution of polypropylene fiber to the plastic shrinkage crack reduction potential and durability of rural road concrete pavement and its evaluation are presented in this paper. The results of plastic shrinkage crack test of the polypropylene fiber reinforced concrete pavement were compared with plain concrete pavement. Results indicated that polypropylene fiber reinforcement showed an ability to reduce the total crack area and maximum crack width significantly (as compared to plain concrete). The effects of durability of polypropylene fiber reinforced concrete were investigated through accelerated laboratory tests simulating the effects of wet-dry cycles and chloride permeability as well as abrasion resistance. Results indicated that the polypropylene fiber reinforced concrete enhanced durability.
Study on the shallow gas distribution in Yeongil Bay using seismic attribute analysis
원종필,신정균,하지호,전형구 한국지질과학협의회 2024 Geosciences Journal Vol.28 No.2
Seismic attribute analysis, a method of highlighting important information in seismic data, has been used in various fields. Recently, several studies have used seismic attributes to interpret seismic anomalies associated with subsurface gas. In this study, we applied seismic attribute analysis to seismic data acquired in Yeongil Bay to identify the subsurface gas distribution. Before applying seismic attributes to the Yeongil Bay seismic data, we selected promising seismic attributes and applied them to F3 Block seismic data to analyze the relation between the seismic attributes and seismic anomalies caused by subsurface gas. Since there are previous studies on the subsurface gas in the F3 Block, we could identify the characteristics of the seismic attributes based on the F3 Block seismic data. Then, we applied the selected seismic attributes to the Yeongil Bay seismic data to define the subsurface gas distribution. Through seismic attribute analysis, a three-dimensional gas distribution model of Yeongil Bay was generated, and this model can provide quantitative information on the subsurface geology of Yeongil Bay.
탄성파 속성 분석을 위한 탄성파 자료 무작위 잡음 제거 연구
원종필,신정균,하지호,전형구 대한자원환경지질학회 2024 자원환경지질 Vol.57 No.1
탄성파 탐사는 지하자원 개발, 지반 조사, 지층 모니터링 등에 널리 사용되고 있는 지구물리탐사 방법으로 정확한 지층 구조 영상을 제공해주기 때문에 지층의 지질학적 특성 해석에 필수적으로 활용된다. 일반적으로는 탄성파 구조 보정 영상을 시각적으로 분석하여 지질학적 특성을 해석하지만 최근에는 탄성파 구조 보정 자료에 대한 정량적인 분석을 통해 원하는 지질학적 특성을 정확하게 추출하고 해석하는 탄성파 속성 분석이 널리 연구되고 있다. 탄성파 속성 분석은 탄성파 자료에 기반한 지질학적 해석에 정량적인 근거를 제시해줄 수 있기 때문에 석유 및 가스 저류층 분석, 단층 및 균열대 조사, 지층 가스 분포 파악 등의 다양한 분야에서 활용되고 있다. 하지만 탄성파 속성 분석은 탄성파 자료 내 잡음에 취약하므로 속성 분석의 정확도 향상을 위해서는 중합 후 탄성파 자료에 대한 추가적인 잡음 제거가 수반되어야 한다. 본 연구에서는 중합 후 탄성파 자료에 대한 무작위 잡음 제거 및 및 탄성파 속성 분석 정확도 개선을 위해 4가지의 잡음 제거 방법을 적용하고 비교한다. FX 디콘볼루션, DSMF, Noise2Noiose, DnCNN을 각각 포항 영일만 고해상 탄성파 자료에 적용하여 탄성파 무작위 잡음을 제거하고 잡음이 제거된 탄성파 자료로부터 에너지, 스위트니스, 유사도 속성을 계산한다. 그리고 각 잡음 제거 방법의 특성, 잡음 제거 결과, 탄성파 속성 분석 결과를 정성적 및 정량적으로 분석한 후, 이를 기반으로 탄성파 속성 분석 결과 향상을 위한 최적의 잡음 제거 방법을 제안한다. Seismic exploration is one of the widely used geophysical exploration methods with various applications such as resource development, geotechnical investigation, and subsurface monitoring. It is essential for interpreting the geological characteristics of subsurface by providing accurate images of stratum structures. Typically, geological features are interpreted by visually analyzing seismic sections. However, recently, quantitative analysis of seismic data has been extensively researched to accurately extract and interpret target geological features. Seismic attribute analysis can provide quantitative information for geological interpretation based on seismic data. Therefore, it is widely used in various fields, including the analysis of oil and gas reservoirs, investigation of fault and fracture, and assessment of shallow gas distributions. However, seismic attribute analysis is sensitive to noise within the seismic data, thus additional noise attenuation is required to enhance the accuracy of the seismic attribute analysis. In this study, four kinds of seismic noise attenuation methods are applied and compared to mitigate random noise of poststack seismic data and enhance the attribute analysis results. FX deconvolution, DSMF, Noise2Noise, and DnCNN are applied to the Youngil Bay high-resolution seismic data to remove seismic random noise. Energy, sweetness, and similarity attributes are calculated from noise-removed seismic data. Subsequently, the characteristics of each noise attenuation method, noise removal results, and seismic attribute analysis results are qualitatively and quantitatively analyzed. Based on the advantages and disadvantages of each noise attenuation method and the characteristics of each seismic attribute analysis, we propose a suitable noise attenuation method to improve the result of seismic attribute analysis.