大气中SO2的液相氧化研究

大气中ＳＯ２液相氧化是形成酸雨的重要途径，降雨中含有各种无机离子和有机物质，它们可能催化或抑制液相氧化反应的进行。本文根据四川酸雨样品组成，进行了ＳＯ２在模拟雨水及实际雨水中的氧化实验，考查了Ｖ，Ｆｅ，Ｍｎ等离子对ＳＯ２氧化的催化作用，Ｈ２Ｏ２对ＳＯ２的氧化以及降水中有机物质甲醛对各反应的影响。实验结果为了解酸雨的成固，研究酸雨控制对策提供了科学依据。     

浅谈超低频电磁波异常与相关地震

介绍了锦州东港电力有限公司地震台多年来应用超低频电磁信息探索地震前兆所总结出的异常形态分别与远震、近震、地方震的对应实例,揭示了ＵＬＦ电磁波异常与将要发生地震映震的一些初步规律,说明了电磁波是地震短临预报的好方法。     

煤层底板采动导水破坏深度计算的神经网络方法

在综合分析影响煤层底板采动导水破坏深度因素的基础上 ,应用人工神经网络方法 ,建立了底板破坏深度的计算模型。该模型利用现场观测资料作为学习训练样本和测试样本 ,对模型的测算结果、理论计算值和实测值进行了对比分析。结果表明 :用神经网络方法计算底板破坏深度考虑的因素更加全面 ,结果更接近于实际。笔者研究的计算模型和测算方法 ,为承压水上安全采煤决策提供了科学依据。     

高校固定资产管理新探

目前，高校资产管理工作在管理意识、管理方法和管理手段等方面都明显滞后，难以适应高校建设与发展的要求。切实加强高校固定资产管理，就要树立全新的固定资产管理理念，建立科学、合理的保障制度，充分发挥财会、审计部门的重要作用，实现资源共建和共享，同时也要建立可行的资产管理绩效考核制度。     

乌鲁木齐市大气环境质量现状及其变化趋势分析

本文对乌鲁木齐市大气环境质量及其发展趋势作了简要的分析,说明目前市大气属煤烟-沙尘型污染区,氮氧化物和二氧化硫随着国民经济能耗的增加有发展的趋势,其它污染物仍稳定在目前水平,或稍有下降.     

Contamination of Oxygen-Consuming Organics in the Yellow River of China

Contamination of oxygen-consuming organics (OCOs) was one of the most serious problems in the Yellow River of China. This study was conducted to analyze monitoring of the data on OCOs contamination for the river in 1980 and during 1992–1999 as well as examining the effect of suspended solids (SS) on chemical oxygen demand (COD_Mn) and biochemical oxygen demand (BOD₅) of river water. Several significant results have arisen from the study. First, COD_Mn and BOD₅ of the river water showed an increasing trend from the upper to the lower reaches of the mainstream. BOD₅ values of river water in 1992 were significantly higher than those in 1980 and showed an increasing trend during 1992–1999. Second, OCOs in river water of the mainstream was attributed mainly to point sources; the ratio of point to non-point sources of BOD₅ was about 2.81. The load from point sources showed an increasing trend during 1992–1998. In contrast, the load from non-point sources manifested a decreasing trend during this period; this was caused by the decreasing trend of SS content in river water. The total load of BOD₅ from point and non-point sources displayed an increasing trend during 1992–1998. Third, as the humic substances in SS can hardly be biologically oxidized in natural conditions but can be oxidized by chemical oxidants such as potassium permanganate, COD_Mn was not suitable for being regarded as a parameter reflecting the pollution degree of OCOs in river water with a high SS content.     

聚硅酸硫酸氯化铝铁絮凝剂的制备及絮凝性能

以粉煤灰为原料制备了无机高分子絮凝剂聚硅酸硫酸氯化铝铁(PSiAFCS),用PSiAFCS处理以硅藻土为原料配制的模拟废水.实验结果表明,在n(Al3+):n(SO4-2)=11、PSiAFCS加入量为2.5mg/L、废水pH为6.0～11.0,温度为60℃、静置时间为20 min、废水初始浊度为50.00～500.00 NTU的范围内,PSiAFCS的絮凝效果良好,浊度去除率大于96%.PSiAFCS对赣江水的浊度去除效果优于聚硅酸氯化铝铁(PSiAFC)和聚合氯化铝(PAC).PSiAFCS加入量为2.5 mg/L时,水样的剩余浊度最低,为0.52 NTU,浊度去除率达98.27%,达到GB5749-2006<生活饮用水卫生标准>中浊度小于1.00 NTU的要求.     

煤矿作业人员防护服装的设计研究

煤矿井下作业人员的防护服装对生产的安全、高效有一定的保障作用.本文在调查和分析了井下作业的环境条件、主要工作内容和动作的基础上,对煤矿井下作业人员的防护服装面料的性能要求和设计要点进行了系统的分析.提出了具体的设计方案.本研究的结果可以为此类功能服装的设计与生产提供参考和借鉴.     

抗压实验法厌氧颗粒污泥机械强度的测定及影响因素分析

通过首先对厌氧颗粒污泥样品进行筛分,然后测定其机械强度,解决了实际操作过程中现有抗压实验法出现的精确度与重现性较差的问题。通过对不同来源厌氧颗粒污泥样品机械强度的测定、对比分析发现,厌氧颗粒污泥的机械强度大小与反应器的规模、反应器所采用水力负荷存在一定的正相关性,且与其主要金属元素（Ca、Fe和Mg）含量的大小存在着密切的关系。     

The effect of conservation tillage in managing climate change in arid and semiarid areas—a case study in Northwest China

Mitigation and Adaptation Strategies for Global Change - Coastal cities are exposed to high risks due to climate change, as they are potentially affected by both rising sea levels and increasingly...