To deduce a new color difference formula based on CIE 1997 Color Appearance Model(CIECAM97s), a color space J a 1 b 1 is first constructed with color appearance descriptors J,a,b in CIECAM97s. The new f...To deduce a new color difference formula based on CIE 1997 Color Appearance Model(CIECAM97s), a color space J a 1 b 1 is first constructed with color appearance descriptors J,a,b in CIECAM97s. The new formula is then deduced in the space and named CDF CIECAM97s. The factors for lightness, chroma and hue correction in the formula are derived by linear regression according to BFD? CP data sets. It is found by statistical analysis that CDF CIECAM97s is in closer accordance with the visual assessments when compared with CMC(1∶1), CIE94 and CIE L *a *b * color difference formulae. Based on color appearance model, the new color difference formula can be used to predict color difference perception in a varity of different viewing conditions.展开更多
对IAPWS-IF97水和水蒸气公式在CFD中的应用进行了研究,利用UDF(User Defined Function)建立了全区域的水和水蒸气材料模型。22.8MPa、不同温度下水蒸气热力学参数的计算结果表明,该模型准确度高,适用的区域广。在此基础上,利用该水和水...对IAPWS-IF97水和水蒸气公式在CFD中的应用进行了研究,利用UDF(User Defined Function)建立了全区域的水和水蒸气材料模型。22.8MPa、不同温度下水蒸气热力学参数的计算结果表明,该模型准确度高,适用的区域广。在此基础上,利用该水和水蒸气模型对圆管以及汽轮机高压缸中蒸汽和设备换热系数进行了计算,为汽轮机热流固耦合计算奠定基础。展开更多
文摘To deduce a new color difference formula based on CIE 1997 Color Appearance Model(CIECAM97s), a color space J a 1 b 1 is first constructed with color appearance descriptors J,a,b in CIECAM97s. The new formula is then deduced in the space and named CDF CIECAM97s. The factors for lightness, chroma and hue correction in the formula are derived by linear regression according to BFD? CP data sets. It is found by statistical analysis that CDF CIECAM97s is in closer accordance with the visual assessments when compared with CMC(1∶1), CIE94 and CIE L *a *b * color difference formulae. Based on color appearance model, the new color difference formula can be used to predict color difference perception in a varity of different viewing conditions.
文摘对IAPWS-IF97水和水蒸气公式在CFD中的应用进行了研究,利用UDF(User Defined Function)建立了全区域的水和水蒸气材料模型。22.8MPa、不同温度下水蒸气热力学参数的计算结果表明,该模型准确度高,适用的区域广。在此基础上,利用该水和水蒸气模型对圆管以及汽轮机高压缸中蒸汽和设备换热系数进行了计算,为汽轮机热流固耦合计算奠定基础。
