意大利南部San Arcangelo市滑坡研究

通过利用航片解译、现场调查和GIS分析,对意大利南部城市San Arcangelo市的滑坡进行了研究,对不同类型滑坡的机理、控制因素进行了分析.研究发现,不同类型滑坡的控制因素有一定差异,形成的环境因素也各不相同;宏观上讲,滑坡的形成在多数情况下是自然因素和人类活动共同作用的结果;滑坡灾害的防治除了采取有效的工程措施以外,人类生活和生产方式也要做出适当的调整,以减轻其对环境的负面影响.     

Epidemiology of musculoskeletal symptoms among Korean hospital nurses.

We investigated the epidemiology of musculoskeletal symptoms (MSS) among a complete cross-section of 330 nurses from a large Korean hospital, by means of a questionnaire survey (response rate: 97.9%). The prevalence of MSS at any body site was 93.6%, with symptoms most commonly reported at the shoulder (74.5%), lower back (72.4%), neck (62.7%), lower legs (52.1%) and hand/wrist (46.7%). Logistic regression indicated that nurses who undertook manual handling of patients were 7.2 times as likely to report MSS (OR 7.2, 95%CI 1.2-42.3, P = .0275), while nurses suffering from periodic depression experienced a 3.3-fold MSS risk (OR 3.3, 95%CI 1.3-8.3, P = .0104). Overall, our study suggests that Korean nurses incur a very high MSS burden when compared internationally. A greater commitment is needed to improve physical conditions, occupational tasks and psychosocial work issues among nurses in this country.     

气体中硫化氢催化焚烧催化剂的制备和性能研究

考察了制备方法对催化剂活性的影响，评价了活性组分的添加量，操作温度和空速对催化剂活性和选择性的影响，在温度290℃，空速5000h^-1条件下，催化剂连续使用200h性能稳定，H2S转化率为SO2生成率在99．9％以上，该催化剂具有优良的性能，适合在硫化氢焚烧装置上使用。     

水喷淋控制烟气输运的大涡模拟研究

本文采用大涡模拟方法研究了烟气输运和水喷淋之间的相互作用问题。研究目的是探讨水喷淋（或细水雾）对烟气输运的控制和抑制的有效性和要行性。为了有效地模拟烟气输运过程，本文采用了低马赫数近似下的三维可压缩滤波形式的Navier-Stokes方程进行有限差分法数值求解。烟气的生成和运动采用携带燃烧反应热的Lagrangian粒子（热元模型）来模拟，同时喷淋器喷出的细水雾也采用模型模拟。在本文的研究中，烟气由一个独立的火池产生并且被一股来流（或风）驱动，从而在一个方形槽道里形成烟气输运，在火池下游槽道的顶部布置若干个喷淋器并喷出水雾，以便探讨水雾对烟气输运的控制作用。本文着重分析讨论了不同喷淋角和水雾半径下水雾对烟气输运的控制和抑制效果。     

水解酸化-生物接触氧化工艺在抗生素废水处理中的应用

介绍了抗生素废水的难降解、硫酸盐和总氮含量高的特点及其治理的必要性.针对这些特点,水解酸化-生物接触氧化工艺在处理中具有优势.从机理上阐述了该工艺解决上述问题的可行性及实际应用,并进一步指出了需要完善之处.     

用复合絮凝剂处理含乳化油废水的试验研究

本文对处理含乳化油废水所用的破乳絮凝剂进行了试验研究.分别采用电解质、无机高分子聚合物及电解质与高分子聚合物复合处理含乳化油废水.结果表明,与采用单一药剂相比,电解质与无机高分子聚合物复合处理含乳化油废水具有投药量小、药剂费用低、处理效果好、pH值适用范围宽等特点.本文还探讨了电解质与无机高分子聚合物复合破乳的机理,并且提出处理不同浓度的含乳化油废水时电解质与高分子聚合物的最佳复配比例及配比规律.还讨论了投加聚丙烯酰胺(PAM)的协同作用.这些为工业应用提供了必要的技术参数.     

铬渣中Cr(Ⅵ)制取铬黄颜料的资源化技术研究

用蒸馏水在直径52 mm和80 mm的有机玻管中淋浸风化铬渣,在渣水比为250 g/200mL、500 g/400 mL和750 g/600 mL的3种方案中,750 g/600 mL的效果最佳.在2种不同管径装置中,可分别得到Cr(Ⅵ)总溶出率为94.0%、98.7%的良好淋浸效果.将含Cr(Ⅵ)的淋滤液替代商品重铬酸钠成功地制备出柠檬铬黄、中铬黄、浅铬黄,PbCrO4含量指标符合国标要求.相对于铅盐、Na2CrO4的理论反应用量,Cr(Ⅵ)浓度为26.21 g/L时,不仅可获取理想的铬黄生成量,而且可使沉淀分离液中检不出Cr(Ⅵ)残留量,但高于此浓度则会出现Cr(Ⅵ)残留.理论值1.15倍的铅盐用量可使Cr(Ⅵ)沉淀完全,铬黄达最高产率.廉价矿物材料改性磷灰石等可用于外排废液中Pb2+的吸附去除,以控制二次污染.利用铬渣中Cr(Ⅵ)溶出液直接制取铬黄颜料,可为铬渣资源化处理开辟一条新途径并获得明显的经济效益.     

INTERACTIVE DISTRIBUTED CONSERVATION PLANNING1

ABSTRACT: In the environmental and agricultural conservation planning process, more efficient and effective tools are needed for planners to assist private landowners with making wiser land use decisions. Current methods are slow, inefficient, and costly. Scientific techniques have not been fully implemented within the planning process, yet such plans are increasingly needed to meet water quality and Total Maximum Daily Load (TMDL) requirements. The objectives of this study are to (a) utilize the web for accessing an integrated science‐based land use decision support system; (b) link decision tools, models, and databases to the user via the web; (c) link distributed models and databases for enhanced planning efficiency; and (d) integrate the above into an easily usable and readily accessible system. The procedures resulting in the initial design involved planning expertise and focus groups' input. The system was developed in partnership with the Natural Resources Conservation Service of the U.S. Department of Agriculture and several state agencies. A survey of 150 certified conservation planners, the end users, was conducted to identify the data sets and planning tools needed. Data, tools, and models then were selected and integrated into a web accessible system. Specifically, the first generation used a web interactive Geographic Information System (GIS) that overlaid onto digital orthoquads and/or soils polygons field boundaries, transportation, hydrologic features (such as drains, rivers, lakes, etc.), and high pesticide risk runoff or infiltration areas. Conservation planners found they could save time with the system. Clients could access the system quickly to help them prepare for meeting with their planner. Previously acquiring GIS maps in some cases had been a lengthy process that limited use of the information in land use decisions.     

气体中雾状物质的采样效率探讨

发生增塑剂 DEP雾 ,粒径主要分布在 0 .48～ 3 .4μm。使用不同容积、不同类型的吸收瓶 (管 )在不同的采样条件下进行 DEP雾样品采集 ,将采样效率和采样过程发生的现象进行比较 ,选择出合适的采样方法和采样条件     

山西中部地区地震灾害损失预测

简要分析了山西中部的历史地震灾害,用地震安全性评定的综合概率法计算了每个单元遭遇烈度的概率,并对建筑物类型进行分类,根据各类建筑物的易损性矩阵和不同类型单元的人涡震亡率、震伤率矩阵,计算出各个单元建筑物的期望经济损失和人员伤亡期望绝对值,并对计算结果进行了分析和比较。