收口工艺反向模拟技术研究

综述了国内外反向模拟技术 ,介绍了收口工艺特点 ,建立了收口反向模拟技术的理论和系统流程 ,并针对收口工艺提出了反向模拟边界条件确定方法。     

固定化细胞处理废水的关键性包埋技术条件研究

研究了以聚乙烯醇为主要包埋材料的混合载体，固定化细胞处理有机废水的关键性包埋技术条件，解决了妨碍固定化细胞在废水处理领域推广应用所的制备成球难，活性丧失大、易破碎、发胀粘连上浮等问题。     

我国机动车排放标准及检测方法简述

根据"新车新标准,老车老标准"的原则,双怠速法将是汽油车基本检测方法,简易工况法在全国范围内分步实施,柴油车将逐步采用不透光烟度计的测量方法.同时介绍了国外相关标准及检测方法.     

活性污泥3号模型对实际工艺的模拟与分析

将活性污泥3号模型(ASM3)与Takács二沉池模型以及反应池流态模型相结合,构建了活性污泥系统模型,并采用Visual Basic 6.0语言编写了计算机模拟程序.将此程序应用于分段进水A/O脱氮工艺中试工艺,分别对其进行了稳态模拟和动态模拟,并取得了与实测值较为接近的结果.同时利用模型分析了运行控制参数对出水水质的影响,模拟结果与实际状况吻合.     

南岭及其邻区多金属成矿条件与开发方向

本文在前人工作的基础之上,对南岭及其邻区的地层、岩浆岩、变质岩和构造综合研究与对比分析后认为,该区成矿条件优越,成矿条件复杂,表现出多金属矿产的共生性与伴生性。开发方向应该充分利用这两个特性,依靠科技,实行投资倾斜,减少资金沉淀,加强综合找矿、综合开采、综合冶炼、综合加工。在提高资源增值率,扩大经济效益的同时保护生态环境,完善产业结构与生产力布局,尽快地把该地区建成有色、稀有、黑色金属工业基地。     

富氧条件下NOx催化净化的研究进展

本文对富氧条件下NOx的催化净化进行了综述与探讨,着重分析了分子筛催化剂、贵金属催化剂以及金属氧化物催化剂在碳氢化合物选择性催化还原NOx反应中的活性及其影响因素,描述了催化反应的机理,并指出了今后的研究方向.     

厌氧菌降解四氯乙烯的研究

报道了洳气污泥富集培养物中厌氧菌降解四氯乙烯的特征。研究结果表明，沼气污泥在甲醇、甲酸盐、乙酸盐、乙醇和Ｈ２／ＣＯ２等不同碳源基质中的富集培养物，以利用甲醇为碳源的富信培养物降解四氯乙烯（Ｔｅｔｒａｃｈｌｏｒｏｅ－ｔｈｙｌｅｎｅ，简称ＰＣＥ，下同）活性最高，平均每升培养液每天降解ＰＣＥ１４００ｎｍｏｌ。经对该富集培养物的分离培养，已分离出４株厌氧细菌，其中一株为甲烷八叠球菌，两株为弧菌，一株为杆菌     

The influence of meteorological conditions and stringent emission control on high TSP episodes in istanbul

Istanbul has faced serious air pollution problems since the mid-80s. This is mainly due to particulate air pollution coming from poor quality lignite in areas, which are heavily populated and industrialized. As a consequence of severe air pollution problems, stringent control on the emissions in the city started in the year of 1994. In this work, in order to study the relationship between emissions and meteorological conditions, an assessment of air pollution episodes and air pollution potential in the city is presented for the terms at the changed emission schedule as the influence of an emission reduction strategy. The influence of meteorological conditions on the TSP (total suspended particulates) levels is considered for two consecutive winter periods. On this occasion, the city has faced different TSP levels and episode characteristics depending on stringent emission reductions covering the banned, poor-quality lignite and fuel switching. For this purpose, climatological conditions and air quality analyses were performed.     

The Modelling of Turbulence from Traffic in Urban Dispersion Models — Part I: Theoretical Considerations

The modelling of pollutant dispersion at the street scale in an urban environment requires the knowledge of turbulence generated by the traffic motion in streets. In this paper, a theoretical framework to estimate mechanical turbulence induced by traffic in street canyons at low wind speed conditions is established. The standard deviation of the velocity fluctuations is adopted as a measure of traffic-produced turbulence (TPT). Based on the balance between turbulent kinetic energy production and dissipation, three different parameterisations for TPT suitable for different traffic flow conditions are derived and discussed. These formulae rely on the calculations of constants that need to be estimated on the basis of experimental data. One such estimate has been made with the help of a wind tunnel data set corresponding to intermediate traffic densities, which is the most common regime, with interacting vehicle wakes.     

加速车道几何参数对合流区交通状况的影响分析*

为分析加速车道几何参数对合流区交通状况的影响,基于实验方案和效率-冲突率评价指标,构建实验平台并标定对应参数,结合实际交通场景数据及速度偏差和交通冲突相关系数指标,验证实验平台有效性。结果表明:w,l随主线流量增大而增大,合流区交通状况逐步变好;随主线流量增大,在l=60 m时,w对合流区交通状况的影响较大且整体交通状况较差,而l相应增大后,w对交通状况影响较小。