The effects of impeller type, stirring power, gas flow rate, and liquid concentration on the gas–liquid mixing in a shear-thinning system with a coaxial mixer were investigated by experiment, and the overall gas hold...The effects of impeller type, stirring power, gas flow rate, and liquid concentration on the gas–liquid mixing in a shear-thinning system with a coaxial mixer were investigated by experiment, and the overall gas holdup, relative power demand, and volumetric mass transfer coefficient under different conditions were compared. The results show that, the increasing stirring power or gas flow rate is beneficial in promoting the overall gas holdup and volumetric mass transfer coefficient, while the increasing system viscosity weakens the mass transfer in a shearing–thinning system. Among the three turbines, the six curved-blade disc turbine(BDT-6) exhibits the best gas pumping capacity; the six 45° pitched-blade disc turbine(PBDT-6) has the highest volumetric mass transfer coefficient at the same unit volume power.展开更多
We present results from one of a set of studies run in the early 2000＇s, which looked at weak signals in terms of what consumers wanted. That study, on milk, revealed four distinct mind-sets, groups of respondents wh...We present results from one of a set of studies run in the early 2000＇s, which looked at weak signals in terms of what consumers wanted. That study, on milk, revealed four distinct mind-sets, groups of respondents who thought alike. These are： S1 Traditional ＋ Health, S2 Traditional ＋ Healthful Ingredients, $3 Traditional ＋ Indulgent, S4 Listens to Authority, respectively. At that time the focus on foods as the source of health and wellness was just beginning. We show how to discover hitherto new, unexpected mind-sets of respondents, using experimental design of messaging, coupled with deconstruction of these messages by regression, and followed by clustering. We suggest that this approach to messaging consumers using experimental design provides a powerful method to uncover emerging mind-sets in the consumer population.展开更多
基金Supported by the Zhejiang Provincial Natural Science Foundation of China(LY16B060003)the National Natural Science Foundation of China(21776246)
文摘The effects of impeller type, stirring power, gas flow rate, and liquid concentration on the gas–liquid mixing in a shear-thinning system with a coaxial mixer were investigated by experiment, and the overall gas holdup, relative power demand, and volumetric mass transfer coefficient under different conditions were compared. The results show that, the increasing stirring power or gas flow rate is beneficial in promoting the overall gas holdup and volumetric mass transfer coefficient, while the increasing system viscosity weakens the mass transfer in a shearing–thinning system. Among the three turbines, the six curved-blade disc turbine(BDT-6) exhibits the best gas pumping capacity; the six 45° pitched-blade disc turbine(PBDT-6) has the highest volumetric mass transfer coefficient at the same unit volume power.
文摘We present results from one of a set of studies run in the early 2000＇s, which looked at weak signals in terms of what consumers wanted. That study, on milk, revealed four distinct mind-sets, groups of respondents who thought alike. These are： S1 Traditional ＋ Health, S2 Traditional ＋ Healthful Ingredients, $3 Traditional ＋ Indulgent, S4 Listens to Authority, respectively. At that time the focus on foods as the source of health and wellness was just beginning. We show how to discover hitherto new, unexpected mind-sets of respondents, using experimental design of messaging, coupled with deconstruction of these messages by regression, and followed by clustering. We suggest that this approach to messaging consumers using experimental design provides a powerful method to uncover emerging mind-sets in the consumer population.
