摘要：随着世界的发展,各行各业对新材料的使用要求越来越高,尤其是钢材的质量,因此,钢铁生产者首要关心的时钢种的洁净度和成分控制,中间包时钢铁生产中的最后一个冶金容器,合理的设计中间包内部形式和流场是十分重要的。

摘要：本文介绍了采用水银温度计作为敏感元件的光纤温度报警器。这种光纤水银温度报警器结构简单，应用广泛，温度测量范围为－３８．８５℃～３５６．９℃。探测精度为±０．１℃。

摘要：从分子设计的观点出发,合成了1种新型的三嗪硼酸酯添加剂。利用响应曲面法,采用BoxBehnken模型,以二次多项式模型拟合,得到反应物摩尔比、反应时间和溶剂用量的拟合方程,对模型进行方差分析,模型拟程度好。利用模型优化实验条件,得到最佳合成条件,实验产率与预测值较为相符,模型具有实际运用价值。

摘要：[Objective] This study aimed to investigate the effects of cigarette auxiliary material parameters on release amounts of tar, CO and free radicals in cigarette mainstream smoke. [Method] The effects of cigarette paper air-permeability, cigarette paper gram weight, filter rod pressure drop and filter tip ventilating strength parameters on the release amounts of tar, CO and free radicals in cigarette mainstream smoke were investigated by single factor experiment and orthogonal experiment. [Result] The cigarette paper air-permeability, filter rod pressure drop and filter tip ventilating strength showed significantly negative correlation with the release amounts of tar, CO and free radicals in cigarette mainstream smoke, to be specific, the cigarette paper air-permeability showed the greatest effect on the release amounts of tar and CO, filter tip ventilating strength showed the greatest effect on the release amounts of gaseous-phase free radicals and particulate-phase free radicals, while cigarette paper gram weight showed relatively slight effect on the release amounts of tar, CO and free radicals. Within the orthogonal experimental range, the optimal program is identified as cigarette paper airpermeability of 70 CU, filter rod pressure drop of 4500 Pa/unit, and filter tip ventilating strength of 60 CU. Compared to the results without optimization, the release amounts of tar, CO and free radicals after optimization were all reduced. [Conclusion] This study laid the foundation for the research of cigarette tar reduction and harm reduction.