跨世纪的中国安全科学学科建设及新拓展

概要分析了安全科学技术学科体系结构,指出学科扩展的思路;提出了学科建设中必须树立全新的观念：安全文化观、大安全观、可持续发展观、综合安全减灾论;探讨了安全减灾科学技术面临的难题和对策;构想安全减灾环保为一体的科学技术新框架     

多媒体辅助英美概况教学的构想与实施

用传统方法讲授英美概况很难达到良好的教学效果。本文论述了用多媒体技术改善教学的思路,并以实例介绍了具体方法,指出了在教学实践中需要注意的问题,同时对教学效果进行了评价。     

N,N-二甲基甲酰胺(DMF)废水处理研究进展

DMF是一种性能优良的有机溶剂和精细化工产品中间体,工业用途广泛,但DMF有毒性,难生物降解.在此综述了DMF废水的主要处理方法,包括生物降解、吸附、萃取、化学氧化、碱性水解等,分析了各种方法的优缺点及适用范围,并展望了DMF废水处理工业化应用的研究方向.     

一种就地固土抑尘用复合外渗剂的研究

用自行设计的试验方法节矿山汽车运输上质路面就地固土抑尘复合外渗剂的研究，分别选用碱金属盐和水玻璃为主料、配以３种表面活性为辅料，按不同浓度配制成３０种外渗剂溶液，进行了下渗（透）能力。表面张力试验和粘结强度，干湿反复的固土性能试验，筛选出了３类性能量优的复合外渗剂配方，并确定了其应采用的外渗施工顺序。该复合外渗剂面单经济、方便快捷，可以适用于广泛领域的固土防尘需要。     

SC110型汽车半轴齿轮的冷摆辗成形

简介PXW-200型冷摆辗机的结构与原理.概述冷摆辗SC110半轴齿轮的工艺设计及工艺参数,模具结构和制造.     

中国工业安全技术展望——我国工业安全技术发展计划简介

目前,我国已具备工业安全科学技术发展的基本条件,并取得了一批成果。本文依据《安全生产中长期科技发展纲要(1990-2000-2020)》和劳动部组织编制的“‘八五’劳动安全科技攻关计划”,着重介绍未来二十年来我国工业安全科技的主要领域和内容,概述“八五”期间拟组织科研攻关的重点项目,展望了工业安全科技的前景和将对提高我国工业安全水平产生的影响。     

推进城市再生水源热泵供热，实现节能减排新突破——沈阳市再生水源热泵供热进展

再生水源热泵供热是指利用热泵技术提取再生水中的低品位热能为建筑物供热。本文以沈阳市系统推进该项节能减排技术为例,阐述了其对国内城市推广再生水源热泵技术供热的重大示范意义,并提出了进一步发展再生水源热泵供热的对策建议。     

Simulation of three-stage operating temperature for supersaturation water-based condensational growth tube

In order to realize accurate dynamic control of supersaturation and to study condensation growth characteristics of nanoparticles through different levels of super saturation,a series of parametric analyses and systematic comparisons between two-stage and three-stage operating temperature designs were simulated with COMSOL Multiphysics.The simulation results showed that the three-stage operating temperature did not change peak supersaturation compared with two operating temperatures,and the three-stage operating temperature was superior in decreasing the amount of water vapor and the temperature,thus lowering particle loss and variation in detection and collection.The peak supersaturation level increased by 0.3 as the flow rate increased from 0.6 to 2.0 L/min,but the supersaturation peak moved from 0.0027 z0 to 0.08 z0(i.e.,the growth time and the final size decreased by 40%).Peak supersaturation increased as the temperature difference increased or the temperature difference window was shifting left,and minimum activation size decreased.Shifting the 70℃temperature difference window from 9℃,79℃-1℃,71℃for the condenser and initiator temperatures resulted in peak supersaturation in the centerline being above 5.8,and the activation size changed as low as 1 nm.Experiments with flow rates varying by a factor of 2.5(from 0.6 to 1.5 L/min) resulted in a final size decrease of 43%(from 3.2 to 1.8 μm),and experimental results of outlet particle size distributions were equivalent with theoretical analysis as the operating temperature was changed.     

Relationships of ozone formation sensitivity with precursors emissions, meteorology and land use types, in Guangdong-Hong Kong-Macao Greater Bay Area, China

Due to the influences of precursors emissions, meteorology, geography and other factors, ozone formation sensitivity (OFS) is generally spatially and temporally heterogeneous. This study characterized detailed spatial and temporal variations of OFS in Guangdong-Hong Kong-Macao Greater Bay Area (GBA) from 2012 to 2016 based on OMI satellite data, and analyzed the relationships of OFS with precursors emissions, meteorology and land use types (LUTs). From 2012 to 2016, the OFS tended to be NO_x-limited in GBA, with the value of FNR (HCHO/NO₂) increasing from 2.04 to 2.22. According to the total annual emission statistics of precursors, NO_x emissions decreased by 33.1% and VOCs emissions increased by 35.2% from 2012 to 2016, directly resulting in OFS tending to be NO_x-limited. The Grey Relation Analysis results show that total column water (TCW), surface net solar radiation (SSR), air temperature at 2 m (T2) and surface pressure (SP) are the top four meteorological factors with the greatest influences on OFS. There are significant positive correlations between FNR and T2, SSR, TCW, and significant negative correlations between FNR and SP. In GBA, the OFS tends to be NO_x-limited regime in wet season (higher T2, SSR, TCW and lower SP) and VOCs-limited regime in dry season (lower T2, SSR, TCW and higher SP). The FNR displays obvious gradient variations on different LUTs, with the highest in “Rural areas”, second in “Suburban areas” and lowest in “Urban areas”.     

富伦纸业污染治理成果的启示

本文报道了富伦纸业通过工艺与设备的调整与改造，工艺全程控制与末端综合治理，不但治理了环境污染，还获得了一定的经济效益。