Computerized electronic temperature control system for thermal efficiency during baking in food research

A more sophisticated temperature control system than the capillary thermostat in conventional electric ovens is necessary for laboratory research on foods. The aim of the study was to develop a computerized temperature control system (CTCS) for conventional electric ovens and to determine whether the CTCS could effect comparable and consistent results in two ovens with regard to oven and product characteristics of baked products. No significant differences were found between the two ovens with regard to average oven temperature, texture and height of products. In most instances there were also no significant differences between the ovens with regard to instrumental colour measurement and moisture loss. The regression results also illustrated the effectiveness of the CTCS, i.e. that an increase in set oven temperature of 1°C has a significant effect on specific oven and product characteristics. The CTCS therefore significantly improved the reproducibility of quality characteristics of baked products. Thus, more consistent and repeatable results can be obtained to improve the reliability of consumer‐driven food research.     

玻璃钢换热器中石墨管和玻璃钢管板连接密封性能研究

本文介绍了一种新型的换热管与管板连接技术,它不但解决温差应力及更换换热管困难问题,还具备承压能力强、适应范围广等特点.     

抗菌 自清洁复合功能整理冬季保暖针织物及整理后保暖性研究

本文选用自制的抗菌、自清洁整理剂,采用"两浴法"对冬季保暖针织面料进行了抗菌、自清洁复合功能整理。通过改变整理剂浓度、焙烘温度、焙烘时间三项整理工艺参数,探讨该复合功能整理对针织物保暖性的影响;根据正交实验,确定抗菌、自清洁试剂的最优化整理工艺为:(1)抗菌整理:整理剂浓度5%(owf)、浴比1:10、水浴恒温60℃浸渍45min,在常温下晾干;(2)自清洁整理:整理剂浓度35g/L、预烘温度120℃(2min)、焙烘温度170℃、焙烘时间0.5min。经该工艺整理后的保暖针织物具有抗菌、自清洁复合功能,且保暖性损失较小,透湿性保持较好,透气性略有下降。     

热传导方程的能量估计

本文以傅立叶交换和分离变量两种方法对热传导方程进行能量的估计,并举例说明其在实际生活中的意义。     

汽蓄热器的原理及应用

介绍了蒸汽蓄热器的原理、结构、应用场合及装设要求等,并结合实例分析了装设蒸汽蓄热器所带来的经济效益。     

热泵供热系统与悬臂式虹吸管在纸机干燥部的应用研究

针对目前纸机干燥部的不足之处,提出了一种新型热泵供热系统的设计思路。对悬臂式虹吸管的结构、工作原理以及性能特点进行了分析研究,同时也对蒸汽喷射式热泵进行了分析研究,并对悬臂式虹吸管在热泵系统中的应用作了详细介绍。悬臂式虹吸管与热泵系统的有机结合,对于提高纸机效率,解决烘缸积水等问题,减少能量的损耗存在重要作用。     

初值为无界情形时解的支集的瞬间收缩性

研究了一类带有强吸收项的半线性热方程的初值问题,在初值数据为无界的情形下讨论了解的支集的瞬间收缩性质,给出了强吸收项的系数与初值数据之间的具体依赖关系.     

沈阳市城市热岛效应研究

本文采用两幅不同时期的TM(ETM+)影像,将不同年份反映的地表温度结果进行归一化处理,通过提取归一化植被指数(NDVI),得出热岛效应的动态变化特征,结果表明:该区域2002年与1992的温度分布存在显著差异;绿地覆盖率需达到一定的比例时,地面温度与植被指数(NDVI)之间存在负相关关系。此研究为城市的后续发展提供参考同时也方便于决策部门对热岛效应的缓解提出治理的机理与对策。     

To smile or not to smile – an eye-tracking study on service recovery

ABSTRACT

The effect of service with a smile on consumers is undoubtedly positive. Yet, in service failure and recovery, this remains unclear. This study examines the importance of morphological characteristics of a smile and different types of smile in service failure and recovery using eye-tracking technology. Results indicated that the degree of mouth activation and the gender of the service worker were crucial factors in service recovery. In addition, eye-tracking data revealed that the longest fixations occurred on smiles with teeth showing and eyes that produced crows’ feet wrinkles. Taken together, this suggests that eye tracking may identify optimal display of smile in service recovery.     

热力工程建设中有补偿直埋敷设的原理与设计

文章分析了直埋供热管道各管段类型的变形和应力分布特点。重点介绍了有补偿直埋敷设的设计原理与计算方法。