Eco‐environmental evaluation with remote sensing in the middle and upper areas of the Yellow River drainage basin

Based on remote sensing data and investigations, this paper focuses mainly on a general evaluation of environmental quality in the middle‐upper areas of the Yellow River region using GIS technology, Arc/Info, and ArcView. In this paper, the upper areas of the Yellow River regions are divided into three parts: the north‐east Qinghai‐Tibet Plateau ecosystem areas, the Erdos Plateau‐Hetao Plain ecosystem areas, and the Loess‐Plateau ecosystem areas. The study analyses the current environmental situation and the overall environmental quality in each ecosystem area and determines the law of distribution of environmental quality in the three areas. Finally, the paper provides some suggestions to improve the ecological environment in each area, in the hope of yielding a scientific foundation based on planning ecological environment protection in the Yellow River basin.     

直接甲醇燃料电池双极板的研究进展

作为直接甲醇燃料电池的关键部件之一,双极板主要起分配燃料和收集电流的作用,其直接影响燃料电池的性能和成本。介绍了目前国内外双极板的研究现状及进展。     

一种简单通用制备纳米羟基磷灰石的方法

详细介绍了如何在普通的实验条件下获得纳米羟基磷灰石的方法。采用化学沉淀法以Ca(H2PO4)2.H2O和Ca(OH)2为原料,聚丙烯酸纳为稳定剂,磁力搅拌器搅拌并辅以超声波作用,通过X射线衍射、透射电镜及细胞共培养评价所制备的材料。结果成功地制备了羟基磷灰石纳米粒子,粒径20～50nm,形貌呈细针状,集成羽毛状均匀分布,羽毛根部宽约20～30nm;并且这些纳米粒子与细胞的共培养效果良好。     

水化学特征分析法在突水水源判别中的应用

山西大远煤业在进行资源整合过程,井下遇到一处出水点,快速判别此出水点水源,成为整合工作安全进行的重点。文章在对矿井先前采集以及后续补充采集的水样进行详细的水文地球化学特征分析后,绘制出水样的P iPer三线图,并通过将出水点与这些背景值的对比,从而初步判断出出水水源。     

北方地区住宅PM10污染状况及综合防治措施

分析了北方部分地区2005年前后住宅内PM10的测试数据,结果表明北方地区住宅内PM10浓度超过国内标准的比例接近1/3,超过美国现行标准的比例为87.9%;住宅内PM10浓度的平均值为119.2μg/m3,约60%住户的室内PM10浓度分布在区间75μg/m3和165μg/m3之间。简要分析了国内北方地区室内PM10超标的主要原因,并对控制室内PM10的污染提出一些建议。