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Pole selection in Polarized Sensory Positioning: Insights from the cognitive aspects behind the task
Polarized Sensory Positioning (PSP) is a relatively new methodology for sensory characterization, based on the comparison of samples to reference products, usually called poles. The key step in the implementation of this methodology is the selection of the poles. In this context, the aim of the present work was to gain insights on the strategies used by consumers to complete this task and to study the influence of the number and characteristics of the poles on results from PSP. Three consumer studies were carried out, on three product categories: chocolate-flavored milks, vanilla milk desserts and orange-flavored powdered drinks. In each study, three groups of consumers (n = 40) evaluated samples using one of three sets of two or three poles. After the PSP task consumers indicated how they evaluated the degree of difference between the samples and the poles, and listed the sensory characteristics of the poles they took into account for the evaluation. Consumers tended to evaluate the degree of difference between the samples and each of the poles by evaluating the intensity of one or two main sensory characteristics. Sample configurations obtained using two and three poles did not largely differ, especially when the poles clearly represented the sensory characteristics responsible for the main differences among samples. This work demonstrates that it is possible to unfold a multidimensional sensory space with the use of just two well-selected poles, and that the number of poles should be selected considering the main sensory characteristics that discriminate among samples. 相似文献
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研究了网状WDM网中双链路失效下共享通路保护(SPP)和共享链路保护(SLP),以及新的保护方式—共享段保护(SSP)的模型,并分析了静态和动态保护算法。动态保护算法可以根据当前网络状态动态调整链路代价,使它们具有较高的资源利用率和较低的阻塞率。 相似文献
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In ice cream and sorbet manufacturing small ice crystals are desired to deliver a product with a smooth texture and good palatability. This research studied the influence of the operating conditions on the ice crystal size and the draw temperature of the sorbet during the freezing process. The evolution of ice crystal size was tracked with the focused beam reflectance measurement (FBRM) technique, which uses an in situ sensor that makes it possible to monitor online the chord length distribution (CLD) of ice crystals in sorbets containing up to 40% of ice. The refrigerant fluid temperature had the most significant influence on the mean ice crystal chord length, followed by the dasher speed, whereas the mix flow rate had no significant influence. A decrease in the refrigerant fluid temperature led to a reduction in ice crystal size, due to the growth of more small ice crystals left behind on the scraped wall from previous scrapings. Increasing the dasher speed slightly reduced the mean ice crystal chord length, due to the production of new small ice nuclei by secondary nucleation. For a given refrigerant fluid temperature and dasher speed, low mix flow rates resulted in lower draw temperatures, due to the fact that the product remains in contact with the freezer wall longer. High dasher speeds warmed the product slightly, due to the dissipation of frictional energy in the product, the effect of which was in part moderated by the improvement in the heat transfer coefficient between the product and the freezer wall. 相似文献
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基于工作流的软件开发过程支持平台框架 总被引:2,自引:0,他引:2
讨论了一个软件开发过程支持平台WSDPP的系统框架,这个平台以基于PSAF过程元模型的工作流引擎为核心,以Agent辅助的PSP Client为开发人员与平台的接口.基于这个平台,软件组织的开发过程可以得到全面的自动化控制,不仅RUP/TSP/PSP的嵌套开发过程可以得到有效的支持,而且可以有效地实现TSP中的任务安排以及工作量平衡,完整地收集组织、团队和个人的生产力数据,达到定量管理的目的.在WSDPP平台上执行规范的自动化开发过程,将克服开发过程中的大部分问题,高效率地开发出高质量的软件产品. 相似文献
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《Food Control》2016
A rapid and simple QuEChERS sample treatment was proposed for the development of a selective hydrophilic interaction liquid chromatography-ESI-MS2-based method for the determination of saxitoxins (STXs) in mussel samples. Among different sorbents, ABS Elut-NEXUS phase, composed of polystyrene cross-linked with 50% divinyl benzene and poly(methyl methacrylate), provided the best results. The effects of experimental parameters, including sorbent amount, vortexing time and centrifugation time were investigated and optimized by experimental design. In particular, regression models and desirability functions were applied to find the experimental conditions providing the highest global extraction response. The method was validated under the optimized conditions; detection and quantification limits in the 3–159 μg/kg and 7–436 μg/kg ranges respectively were obtained, except for C2 for which highest values were calculated due to its low ESI ionization efficiency. Finally, the analysis of twenty-eight mussel samples permitted to detect and quantify some of the investigated STXs, proving the applicability of the devised method. 相似文献