孔雀绿分光光度法测定炭素制品中微量铅的研究

采用分光光度法来测定炭素制品中微量铅的含量。经比较实验确定了该方法最佳的实验奈件。该方法操作简便、快速、检出限低、灵敏度高，是检测微量铅含量一种较理想的方法。     

防腐蚀涂装系统设计

介绍了防腐蚀涂装设计的影响因素，涂料产品的相关文件以及确立防腐蚀涂装设计应考虑的基本原理和情况。     

柔性管设计中允许竖向变形的合理取值

本文分析了地下埋设的柔性管的竖向变形与管壁弯曲性能的关系，讨论了几类不同材质管道承受一定的工作压力时它们的竖向变形的合理取值。     

Factors influencing behavioural intention to patronise restaurants using iPad as a menu card

Recently, several restaurants have launched mobile technology-based self-services by replacing their printed menus with iPads. To assess the perceived value of the iPad menu from the customers’ perspective, this study proposed and tested a new research model which includes both functional and emotional aspects of customers’ attitudes. The aim was based on the supposition that an overall value judgement in regard to using the iPad menu to promote dining experience will influence customers’ behavioural intention to patronise restaurants that use the new technology; 332 usable data gathered from cyberspace were tested against the research model. The results demonstrated the importance of perceived value. All functional factors (i.e. perceived control, perceived usefulness and perceived ease of use) and emotional factors (i.e. perceived enjoyment and perceived novelty) were significantly affecting perceived value. For managers interested in investing in these mobile self-service technologies, the findings provided them with sound advice based on empirical research.     

1995年中国化学工业

介绍了１９９５年及“八五”期间中国化学工业在生产的增长、基建与技改、科技进步、对外开放、深化企业改革和强化管理方面取得的成绩；同时指出了存在问题和“九五”时期的建设目标。     

Effect of natural antioxidants in virgin olive oil on oxidative stability of refined,bleached, and deodorized olive oil

The factors influencing the oxidative stability of different commercial olive oils were evaluated. Comparisons were made of (i) the oxidative stability of commercial olive oils with that of a refined, bleached, and deodorized (RBD) olive oil, and (ii) the antioxidant activity of a mixture of phenolic compounds extracted from virgin olive oil with that of pure compounds andα-tocopherol added to RBD olive oil. The progress of oxidation at 60°C was followed by measuring both the formation (peroxide value, PV) and the decomposition (hexanal and volatiles) of hydroperoxides. The trends in antioxidant activity were different according to whether PV or hexanal were measured. Although the virgin olive oils contained higher levels of phenolic compounds than did the refined and RBD oils, their oxidative stability was significantly decreased by their high initial PV. Phenolic compounds extracted from virgin olive oils increased the oxidative stability of RBD olive oil. On the basis of PV, the phenol extract had the best antioxidant activity at 50 ppm, as gallic acid equivalents, but on the basis of hexanal formation, better antioxidant activity was observed at 100 and 200 ppm.α-Tocopherol behaved as a prooxidant at high concentrations (>250 ppm) on the basis of PV, but was more effective than the other antioxidants in inhibiting hexanal formation in RBD olive oil.o-Diphenols (caffeic acid) and, to a lesser extent, substitutedo-diphenols (ferulic and vanillic acids), showed better antioxidant activity than monophenols (p- ando-coumaric), based on both PV and hexanal formation. This study emphasizes the need to measure at least two oxidation parameters to better evaluate antioxidants and the oxidative stability of olive oils. The antioxidant effectiveness of phenolic compounds in virgin olive oils can be significantly diminished in oils if their initial PV are too high.     

超支化聚酯的合成及光固化性能研究

通过甲基四氢苯酐和环氧丙醇的开环聚合反应，一步法制备超支化聚酯，聚酯的数均摩尔质量为1450～2600g／mol，支化度在0．41～0．71之间。用甲基丙烯酸缩水甘油酯改性，合成了UV固化超支化聚酯，并对其光固化性能进行了初步研究，发现超支化聚酯能有效降低固化膜的线收缩率，聚酯的官能度越高，固化膜的硬度越大，固化速度越快，在约1s的固化时问内凝胶率超过75％。     

Markov随机场与Gaussian曲线在MR图像分割中的应用

针对扫描的人脑组织MR图像边缘分辨率低、模糊性大的特点,本文提出了一种基于模糊Markov随机场和Gaussian曲线相结合的MR图像最佳阈值分割方法。该方法通过对图像的像素邻域属性的统计将模糊论引入其中,建立模糊Markov随机场,并利用Gaussian曲线对二维直方图最佳一维投影进行拟合,确定出图像中各脑组织的二维阈值点,在二维直方图上实现对脑组织的分割。通过实验表明,本算法能够有效提高脑组织的分辨率,对噪声的鲁棒性、结果区域的连通性相对于一维Otsu和二维Otsu算法都有了很大的提高。     

一种基于案例的多准则排序方法

针对带有间接偏好信息的多准则决策问题, 首先利用加性效用函数理论提出一种排序方法, 该方法通过构建一个简单的优化模型, 得到与间接偏好信息相容的各评价值的效用; 然后, 利用线性插值方法计算出剩下方案各评价值的效用, 进而得到所有方案的综合效用及排序; 最后, 通过实例验证了该方法的有效性和可行性.