http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
효율적인 점 기반 렌더링을 위한 확장 이차 오류 척도 기반의 간략화 방법 개발
김덕봉(Duck-bong Kim),강의철(Eui-chul Kang),이관행(Kwan H. Lee),Renato B. Pajarola 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.2
본 논문은 효율적인 점 기반 렌더링(Point-based Rendering)을 위해 확장 이차 오류 척도(Quadric Error Metrics) 기법을 이용하는 간략화 알고리즘을 제안한다. 점 기반 렌더링의 기본 개념은 자유곡면을 메쉬와 같은 연결정보 없이 직접 점들로 표현하고, 렌더링하는 것이다. 확장 이차 오류 척도 기법은 메쉬를 간략화 하는데 있어 기하 정보뿐만 아니라 색상, 텍스쳐 좌표 정보까지 고려하여 간략화 하는 알고리즘이다. 이 연구는 3차원 점 데이터로부터 복원한 폴리곤 메쉬 모델로부터 효율적인 점 기반 렌더링(Point-based Rendering)을 위해 기하 정보 및 색상 정보까지 고려하여 원본 점 데이터를 간략화 하는 저용량의 효율적인 점 기반 렌더링 알고리즘을 제안하고, GPU 기반 렌더링 결과를 보였다.
김덕봉(Duck-Bong Kim),김덕진(Deok-Jin Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The temperature-entropy diagram of air displays graphically the thermophysical properties, so it is very conveniently used in various thermal systems. In previous study, the software analyzing 31 sorts of values in water-vapor system and 32 sorts of values in air-conditioning system were developed. In this study, the software drawing 13 sorts of air properties and analyzing 25 sorts of values in any air system was developed. The 13 sorts of air properties are temperature, pressure, specific volume, specific internal energy, specific enthalpy, specific entropy, specific exergy, exergy ratio, density, isobaric specific heat, isochoric specific heat, ratio of specific heat, and velocity of sound, and the 25 sorts of values including 13 sorts are mass flow rate, volume flow rate, internal energy flow rate, enthalpy flow rate, entropy flow rate, exergy flow rate, heat flow rate, power output, power efficiency, reversible work, lost work, and relative humidity. The developed software can analysis any state or process on air system, and this supports various document-editing functions such as power point. We wish to this chart is a help to design, analysis, and education in air system field.
김덕봉(Duck Bong Kim),서명국(Myoung Kook Seo),김강연(Kang Yeon Kim),이관행(Kwan H. Lee) (사)한국CDE학회 2010 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2010 No.1
Driven by trends in fashion, pearlescent paints have a growing economic significant in many industrial products due to the special visual effect and the ease use of imitation. The special visual effect originates from an optical interference effect between many small pearlescent platelets, which allow the visual appearance to vary depending on each light and view direction. Multi-spectrum based approaches which use spectral distributions give us more accurate image synthesis compared to the use of only RGB-based approaches since pearlescent paint is very sensitive to specific wavelength bands. We propose a novel image-based goniospectrophotometer system to measure the multi-spectral bidirectional reflectance distribution functions (BRDF) for the realistic image generation of pearlescent paints with combining the high dynamic range image (HDRI) and multi-spectral image technologies.
공기의 온도-엔트로피 선도 상에서 13 종류의 물성치 작도
김덕진(Deok-Jin Kim),김덕봉(Duck-Bong Kim) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
The T-s chart of air displays graphically the thermophysical properties, so it is very conveniently used in various thermal systems. In previous study, the software analyzing 31 kinds of values in water system and 32 kinds of values in air-conditioning system were developed. In this study, the software drawing 13 kinds of quantity of state on air properties as ideal gas and analyzing 25 kinds of values in any air system was developed. The 13 kinds of quantity of state on air properties are temperature, pressure, specific volume, specific internal energy, specific enthalpy, specific entropy, specific exergy, exergy ratio, density, isobaric specific heat, isochoric specific heat, ratio of specific heat, and velocity of sound, and the 25 kinds of values including 13 kinds are mass flow rate, volume flow rate, internal energy flow rate, enthalpy flow rate, entropy flow rate, exergy flow rate, heat flow rate, power output, power efficiency, reversible work, lost work, and relative humidity. The developed software can draw any range of chart and analysis any state or process on air system. Also, this supports various document-editing functions such as power point. We wish to this chart is a help to design, analysis, and education in air system field.
김덕진(Deok-Jin Kim),김덕봉(Duck-Bong Kim) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Exergy is the amount of reversible work obtainable when some matter is brought to a state of thermodynamic equilibrium with ambient. This exergy is availability or useful work induced from carnot cycle, and this can calculate the irreversible loss work which occurs within any thermal or power cycle. The exergy ratio is the value of exergy divided by enthalpy of ambient reference, where the quality of energy or enthalpy in substances is evaluated by exergy ratio. Exergy is very important in optimal design method of thermal system or each component, and the value of exergy at given state is calculated by equation. Here, designer can easily understand and find the value of enthalpy because enthalpy is graphically drawn in chart, however exergy did not. In this paper, exergy and exergy ratio of air were drawn on temperature-entropy chart, and we wish to this chart is a help to design, analysis and education.
공기의 온도-엔트로피 선도 상에서 엑서지 및 엑서지율의 작도
김덕진(Deok-Jin Kim),김덕봉(Duck-Bong Kim) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Exergy is the amount of reversible work obtainable when some matter is brought to a state of thermodynamic equilibrium with ambient. This exergy is availability or useful work induced from carnot cycle, and this can calculate the irreversible loss work which occurs within any thermal or power cycle. The exergy ratio is the value of exergy divided by enthalpy of ambient reference, where the quality of energy or enthalpy in substances is evaluated by exergy ratio. Exergy is very important in optimal design method of thermal system or each component, and the value of exergy at given state is calculated by equation. Here, designer can easily understand and find the value of enthalpy because enthalpy is graphically drawn in chart, however exergy did not. In this paper, exergy and exergy ratio of air were drawn on temperature-entropy chart, and we wish to this chart is a help to design, analysis and education.