混合集成型光学拾音器的设计与制作

通过混合集成型结构光学拾音器的光学设计和芯片设计，制作了包含微光学棱镜，光电探测器和信号放大电路的混合集成型光学拾音器。经过测试，发现有较好的信号输出特性，表明混合集成型光学拾音器已基本研制成功。     

微重力落塔电磁悬吊、释放技术研究

论述了微重力落塔电磁悬吊、释放、提升机构的关键技术,电磁释放过程的特性分析以及微重力落塔实际试验的情况。分析说明:悬吊、释放性能的好坏决定了试验落舱的微重力水平,也是微重力落塔试验能否成功的关键技术。     

罐装食品用电镀锡板的耐蚀性及其试验方法

综述了影响罐装食品用电镀锡板耐蚀性能的因素及其试验方法。     

地热、温泉水利用中氡的防护

地热作为一种比较经济、方便的新能源的同时,也给公众和环境带来辐射影响。本文介绍了地热和温泉水中~(222)Rn 的放射性水平及其对人体健康的影响,对地热、温泉水利用中氡的防护措施提出了一些建议。     

Association between cigarette smoking and lipid peroxidation in a controlled feeding study

BACKGROUND: Cigarette smoke may promote atherogenesis by producing oxygen-derived free radicals that damage lipids. However, evidence in support of this hypothesis is inconsistent because most studies did not control for aspects of diet (antioxidants and lipid substrate) that may confound the association between smoking and measures of lipid peroxidation. METHODS AND RESULTS: The relationships between cigarette smoking and two measures of lipid peroxidation, breath ethane (an in vivo assay) and thiobarbituric acid-reactive substances (TBARS, an in vitro assay), were examined in 123 adults (11% of whom were smokers) participating in a controlled feeding study. After 3 weeks of controlled feeding on a common diet (36% total fat, 14% saturated fats, 6% polyunsaturated fats, and 12% monounsaturated fats), breath and fasting serum samples were collected for measurement of ethane and TBARS, respectively. Baseline characteristics of smokers and nonsmokers were similar, including several indices related to diet and nutritional status (albumin, cholesterol, body mass index, and oxygen radical-absorbing capacity). Cigarette smokers had significantly higher breath ethane (8.88 versus 1.71 pmol/L; P<.0001) and TBARS (24.0 versus 20.7 micromol/mL; P=.008) than nonsmokers. The interval between breath collection and the time the last cigarette was smoked was significantly and inversely correlated with breath ethane. Neither measure of lipid peroxidation was associated with measures of serum cholesterol or albumin, body mass index, or serum oxygen radical-absorbing capacity. CONCLUSIONS: Cigarette smokers have higher rates of in vivo and in vitro lipid peroxidation. These results support the hypothesis that the atherogenic effects of smoking are mediated in part by free radical damage to lipids.     

二次型时频分析技术的开发与应用

基于二次型的时频分析是高分辨率时频分析技术的有效方法之一，该项技术能够有效反映时变信号的频谱特性，具有分辨率高、能量集中和跟踪瞬时频率的特点。从时变信号的特点出发，阐述了二次型时频分析技术的基本方法原理，采用正演模型分析验证了该方法的有效性，并在实际地震资料中应用于识别物源方向、划分沉积相带、预测储层结构以及相对厚度等诸多方面，均取得了较好的效果。     

生态城市与水利现代化

对天津及其滨海新区生态城市水利建设进行了分析。研究了在淡水资源极度匮乏的条件下,有效开发利用非常规水资源的必要性、重要性和现实性。认为天津市对水资源应遵循节水、治污、高效配置,妥善处理生活、生产、生态之间的关系,力求平衡调配。供水水源应是多元的,增加非常规水资源(污水、海/咸水、雨/洪水)的利用,同时增加可用地下水,外调来水等,逐步进入可持续发展配置。     

等离子炉炭热法冶炼钼铁

等离子炉炭热法冶炼钼铁是利用炭在高温下的强还原性，以炭热和等离子热代替金属热．直接得到优质钼铁。     

土壤γ辐射剂量率间接测量中的^222Rn析出和含水量修正

本文针对Ｂｅｃｋ公式的局限性，对土壤的含水量和＾２２２Ｒｎ析出引起的γ辐射剂量率变化进行了修正。通过浙江省５７６组测量数据的实验拟合，给出了剂量率计算的修正公式。该公式应用到浙江省自身的测量数据上，使计算的总体均值与实测均值仅相差０．８％；每一点位的计算值与实测值相比，平均仅相差３．４％，其比值离散性与实验误差相一致。而Ｂｅｃｋ公式的计算结果与实测剂量率相比较，以上两项分别偏离＋１０％和１５．２％