生物质材料在秒量级脉冲激光加热下的导热特性研究

通过系统的实验,对常温下生物质材料在秒量级脉冲加热下的导热特性进行了研究,并且针对本实验的条件分别进行了抛物线型和双曲线型两种导热模型的数值模拟,结果发现,傅里叶模型的计算结果和实验结果非常吻合,而双曲线模型的计算结果和实验结果相差很大,这说明在本实验的条件下,在所用的生物质材料中没有发现非傅里叶现象,同时也说明某些文献所述各种生物质材料的热松弛时间为秒量级的结论还有待商榷。     

新型PET瓶盖杀菌系统的研究与开发

PET瓶超净及无菌灌装技术已成为饮料行业的发展趋势。目前在PET生产线上对瓶盖的杀菌方式主要有紫外线杀菌、倒瓶热力杀菌、化学药剂杀菌等,都存在着杀菌不彻底或者收集处理困难以及成本高等问题。在研究各类杀菌方式、特点的基础上,文章提出了通过过氧化氢喷雾+无菌热空气激发+高强度紫外线结合杀菌的理论,开发一种杀菌彻底,残留少的新型PET瓶盖在线杀菌系统。     

Bayesian approach for optimal PV system sizing under climate change

This paper proposes a novel statistical approach for optimally sizing a stand-alone photovoltaic (PV) system under climate change. Traditionally, the irradiation profile of a typical day or year is used to size PV systems. However, facing the global warming crisis as well as the fact that no two years would have the same weather condition for a single site, this often makes the traditional way failed in the extreme weather conditions. This paper presents a method to statistically model the trend of climate change year by year and put it into the sizing formula, so that the results are optimal for the current weather condition and confidential for the future as well. Hence, the suitable sizes for the PV array and the number of batteries are obtained by pure computation. This is different from the traditional simulation-based sizing curve method. An economic optimization procedure is also presented. In addition to the capital and maintenance costs, a penalty cost is introduced when service fails. A new statistic-based reliability index, the loss of power probability, in terms of threshold-based Extreme Value Theory is presented. This index indicates the upper bound reliability for applications and provides rich information for many extreme events. A technological and economic comparison among the traditional daily energy balance method, sizing curve method and the proposed approach is conducted to demonstrate the usefulness of the new method.     

A Bayesian approach to Weibull survival models—Application to a cancer clinical trial

In this paper we outline a class of fully parametric proportional hazards models, in which the baseline hazard is assumed to be a power transform of the time scale, corresponding to assuming that survival times follow a Weibull distribution. Such a class of models allows for the possibility of time varying hazard rates, but assumes a constant hazard ratio. We outline how Bayesian inference proceeds for such a class of models using asymptotic approximations which require only the ability to maximize the joint log posterior density. We apply these models to a clinical trial to assess the efficacy of neutron therapy compared to conventional treatment for patients with tumors of the pelvic region. In this trial there was prior information about the log hazard ratio both in terms of elicited clinical beliefs and the results of previous studies. Finally, we consider a number of extensions to this class of models, in particular the use of alternative baseline functions, and the extension to multi-state data.     

微波毫米波辐照对生物体血液系统的影响

介绍了微波毫米波的生物医学效应，观察了大功率微波对生物体外用血像的损伤作用和低功率毫米波的治疗作用，发现大功率微波照射对血液粘度、红细胞聚集性和变形性、血小板聚集性有严重的杀伤作用，而低功率毫米波对特定部位的有效照射能够对白细胞和骨髓细胞产生保护作用，能减轻化疗和放疗期白细胞的下降，提高机体对化学药物治疗和放射剂量的承受力。     

微波辐射对油脂稳定性影响的研究

以大豆油、菜籽油和猪油为原料 ,研究微波辐射场中油脂的抗氧化稳定性。结果发现在微波作用下油脂的抗氧化稳定性与场的强度、作用时间、油脂的不饱和程度有关     

猪肉脯的加工工艺与辐照杀菌

介绍了猪肉脯的加工工艺和辐照处理过程 ,并确定了辐照杀菌、保藏的工艺条件。产品卫生指标达到相关产品的国标标准。     

Risk Communication, Knowledge, and Attitudes: Explaining Reactions to a Technology Perceived as Risky

Several factors influence peoples'decisions about food irradiation, a technology perceived as risky. Responses to questions about three dimensions of acceptability of food irradiation provide the dependent variables. Risk message characteristics, respondent background characteristics, knowledge, and attitudes form the independent variables. Multiple regression is used to assess relative effects. Levels of acceptability of food irradiation varied somewhat as the focus of the question changed: negative reactions were more likely if the question mentioned serving it to family members than it it stressed self use. The only message manipulation that had a significant impact was information about irradiated food users (e.g., astronauts) and prestigious national and international organizations that endorse food irradiation.
Support for a normative/value type of decision-making is more substantial than for a rational/technical type of decision-making. Although knowledge of food irradiation correlates with support for the technology, trust factors are much more powerful predictors. The implications for effective risk communications are discussed.     

中子照像前屏厚度的优选

本文分析了中子照像闪烁增强屏的工作机理,推导出前屏光强输出的计算公式。由该式可知,就光强输出而言,前屏具有一个最佳厚度,在此厚度下光强输出最大。