体系结构产品向可执行模型转换已成为评估系统动态逻辑、行为以及性能的重要方法,参与构建可执行模型的体系结构产品越丰富,可执行模型的验证能力就越强.为了进一步扩展可执行模型—着色Petri网(Coloured Petri Nets,CPN)对系统动态行...体系结构产品向可执行模型转换已成为评估系统动态逻辑、行为以及性能的重要方法,参与构建可执行模型的体系结构产品越丰富,可执行模型的验证能力就越强.为了进一步扩展可执行模型—着色Petri网(Coloured Petri Nets,CPN)对系统动态行为的验证范围,提出了DoDAF1.0下构建体系结构可执行模型的改进方法,将OV2纳入了构建可执行模型的体系结构产品序列,建立了OV2与OV5融合模型,最终结合案例分析说明了该方法的可行性.展开更多
In the present study, the decomposition rates of carbon tetrachloride （CC14） and 2,4-dichlorophenol （2,4- DCP） in water by the ultraviolet （UV） light irradiation alone and H2O2AYV were experimentally investigate...In the present study, the decomposition rates of carbon tetrachloride （CC14） and 2,4-dichlorophenol （2,4- DCP） in water by the ultraviolet （UV） light irradiation alone and H2O2AYV were experimentally investigated. The detailed experimental studies have been conducted for examining treatment capacities of the two different ultraviolet light sources （low and medium pressure Hg arc） in H2O2/UV processes. The low or medium UV lamp alone resulted in a 60%-90% decomposition of 2,4-DCP while a slight addition of H2O2 resulted in a drastic enhancement of the 2,4-DCP decomposition rate. The decomposition rate of 2,4-DCP with the medium pressure UV lamp alone was about 3-6 times greater than the low pressure UV lamp alone. In the direct photolysis of aqueous CC14, the medium pressure UV lamp had advantage over the low pressure UV lamp because the molar extinction coefficient of CC14 at shorter wavelength （210-220 nm） is about 20 to 50 times higher than that at 254 nm. However, adding H202 to the medium pressure UV lamp system rendered a negative oxidation rate because H202 acted as a UV absorber being competitive with CC14 due to negligible reaction between CC14 and OH radicals. The results fi：om the present study indicated significant influence of the photochemical properties of the target contaminants on the photochemical treatment characteristics for designing cost-effective UV-based degradation of toxic contaminants.展开更多
文摘体系结构产品向可执行模型转换已成为评估系统动态逻辑、行为以及性能的重要方法,参与构建可执行模型的体系结构产品越丰富,可执行模型的验证能力就越强.为了进一步扩展可执行模型—着色Petri网(Coloured Petri Nets,CPN)对系统动态行为的验证范围,提出了DoDAF1.0下构建体系结构可执行模型的改进方法,将OV2纳入了构建可执行模型的体系结构产品序列,建立了OV2与OV5融合模型,最终结合案例分析说明了该方法的可行性.
文摘In the present study, the decomposition rates of carbon tetrachloride （CC14） and 2,4-dichlorophenol （2,4- DCP） in water by the ultraviolet （UV） light irradiation alone and H2O2AYV were experimentally investigated. The detailed experimental studies have been conducted for examining treatment capacities of the two different ultraviolet light sources （low and medium pressure Hg arc） in H2O2/UV processes. The low or medium UV lamp alone resulted in a 60%-90% decomposition of 2,4-DCP while a slight addition of H2O2 resulted in a drastic enhancement of the 2,4-DCP decomposition rate. The decomposition rate of 2,4-DCP with the medium pressure UV lamp alone was about 3-6 times greater than the low pressure UV lamp alone. In the direct photolysis of aqueous CC14, the medium pressure UV lamp had advantage over the low pressure UV lamp because the molar extinction coefficient of CC14 at shorter wavelength （210-220 nm） is about 20 to 50 times higher than that at 254 nm. However, adding H202 to the medium pressure UV lamp system rendered a negative oxidation rate because H202 acted as a UV absorber being competitive with CC14 due to negligible reaction between CC14 and OH radicals. The results fi：om the present study indicated significant influence of the photochemical properties of the target contaminants on the photochemical treatment characteristics for designing cost-effective UV-based degradation of toxic contaminants.
