广州大田山垃圾填埋场空气中微量挥发有机污染物组成

以广州大田山垃圾填埋场为例，研究了在不同季节填埋场空气中微量挥发性有机污染物的种类和含量变化情况。结果表明，在春、夏季样品中可分别检测出47和64种化合物，其中有些化合物为USEPA优先控制毒害有机污染物；夏季样品中微量挥发性有机污染物的浓度大多比春季样品高，有的甚至高1个数量级以上。因此加强对垃圾的卫生填埋，尤其是加强对夏季的垃圾卫生填埋的科学管理，减少挥发性有机污染物向大气中的扩散，应给予充分的关注。     

煤矿轴流式局部通风机的降噪试验研究

煤矿局部通风机（简称“局扇”）的噪声是煤矿掘进中的主要噪声源，分析了局扇噪声的产生机理，提出了减少局扇的动叶叶顶与机壳间隙，在局扇入口加阻性消声器和在机壳涂上一层阻尼材料等方法来控制局扇的噪声方法，方法在JBT52－2型局扇的试验研究表明，实施上海降噪措施，局扇的噪声有大幅度降低，可使局扇的噪声达到工矿企业噪声卫生标准要求。     

移动床生物膜反应器充氧能力的试验研究

对移动床生物膜反应器的充氧能力进行了试验研究，结果表明：反应器充氧能力在添加填料比无填料时大；在悬浮载体能够均匀流化的填充率范围内，反应器充氧能力随着填充率的增大而增大；当填充率大于可以均匀流化的最大填充率时，反应器的充氧能力略有下降。     

新疆伽师6级强震群综述

本文对伽师成丛发生强震的机因，伽师地震的预报以及地震灾害损失与应力场状态等给出了结果。并就伽师地区防震减灾对策和重建问题提出了讨论及具体对策意见。     

青藏高原北缘P波波形线性度的动态跟踪及其变化的物理机制初探

利用数字化近震Ｐ波波形资料，追踪研究了青藏高原北缘１９９０年２月～１９９５年８月Ｐ波波形时间线性度的变化过程。发现该区较大地震发生前线性度有一定程度的下降现象。分析认为：大震前孕震区应力场的不均匀分布可使通过孕震区及其周缘的地震波产生频散，可能是较大地震前波形时间线性度下降的物理本质     

Fenton法氧化降解聚乙烯醇的机制

为深入了解Fenton法氧化降解聚乙烯醇（PVA）的机制，通过考察反应过程中COD、BOD5、总有机碳及pH等随反应时间的变化，研究了聚乙烯醇Fenton氧化降解过程的特点，结果表明，当PVA被Fenton试剂氧化时，可生成大量CO2，同时生成酸性中间产物。进一步分析认为，当Fenton试剂中H2O2不足景时PVA氧化的中间产物以醛为主，而当H2O2足量时醛会被继续氧化生成有机酸，最终COD去除率达到80％。     

浅谈安全文化

20世纪80年代,我国劳动保护界的学者和专家提出了安全文化的理念, 提出了劳动保护科学体系的构想,1992 年建立了相应的学科。20世纪末,我国一批学者又提出了安全、减灾、环境科学交叉融合的大安全科学技术体系,针对传统安全理念开展了企业安全文化、大众安全文化、社区安全文化等理论研究。为我国安全科学奠定了理论基础, 并不断完善和拓展了我国安全科学技术学科的建设。     

伊宁市饮用水源地水质变化动态趋势分析

根据近10年的监测数据，对伊宁市饮用水源地水质变化进行动态趋势分析，无显著变化。     

A study on oxidative degradation of polyacrylamide in wastewater with UV/FENTON/C4H4O62−

The degradation of polyacrylamide (PAM) in simulate wastewater was studied in UV/Fenton/C₄H₄O₆^2? system. The factors such as molecular ratio of H₂O₂/Fe²⁺/C₄H₄O₆^2?, pH, and the dosage of Fenton reagent that could affect the PAM degradation in the UV/Fenton/C₄H₄O₆^2? system were investigated. The experimental results showed that adding C₄H₄O₆^2? to UV/Fenton system could form photosensitive ferrous complexes, which led to higher degradation efficiency of PAM. The degradation rate of PAM could be up to 95.2% under the following conditions: the concentration of H₂O₂, Fe²⁺, and C₄H₄O₆^2? were 22.5, 2.25, and 2.25 mmol/L, respectively (i.e., molecular ratio of H₂O₂/Fe²⁺/C₄H₄O₆^2? was 10:1:1), the pH value was 3.0.     

Comparison of the daily global solar radiation from different data sources in Northwest China climate

The solar radiation data are of high importance to the solar energy systems. Conventional methods to obtain the solar radiation data are from weather stations, solar radiation models, commercial software databases, and field measurements. In the present study, a new daily global solar radiation model is proposed, by combining the quadratic function of sunshine fraction and sine function of the day of the year. The solar radiation model calculated data are then compared with China Meteorological Data Sharing System (CMDSS) data, TRNSYS data, and field-measured data in Northwest China climate. It is found that the newly proposed solar radiation model has better performance than the other nine solar radiation models in the literature. The solar radiation model calculated data fit well with the CMDSS annually average data. The TRNSYS data are a bit larger than the CMDSS annually average data in summer half year and a little smaller than those in winter half year. The solar radiation model and the CMDSS annually average data have the best correlation, whereas the TRNSYS data and the field-measured data have the worst correlation. The solar radiation model calculated data have the best correlation with the other three data sources.