GIS工程建设方法探讨

首先分析了GIS软件及其数据库技术.在研究GIS软件自身及其数据特点的基础上,初步探讨、总结用面向对象的方法如何结合软件工程进行大型GIS工程建设.     

工程公司的信息化建设

对国内工程公司信息化现状进行了分析，阐述了工程公司进行信息化建设的必要性，确立了信息化建设应该遵循的基本原则，并给出了工程公司信息化建设的实施的步骤。     

Interaction of Bacillus polymyxa with some oxide minerals with reference to mineral beneficiation and environmental control

Interaction of Bacillus polymyxa with calcite, hematite, corundum and quartz resulted in significant surface chemical changes not only of the cells but also in the minerals. Both the cell surfaces as well as quartz particles were rendered more hydrophobic after mutual interaction, whilst the rest of the minerals exhibited enhanced hydrophilicity after interaction with the bacteria. The bacteria were also observed to be capable of dissolving calcite, hematite and corundum and biosorbing the dissolved metal ions to varying extents. An excess of polysaccharides could be observed on biotreated calcite, hematite and corundum while the predominance of a protein-based metabolic product was evident on quartz surfaces. The utility of bioprocessing in the beneficiation of the above minerals through bioflotation and bioflocculation is demonstrated.     

从稀土矿石浸出液中分离稀土元素 1.用离子交换树脂从矿石浸出液中吸附稀土

用001×7阳离子交换树脂可以从矿石浸出液中吸附稀土元素。小型试验与扩大试验表明,采用流化床设备进行连续逆流离子交换是可行的。     

铝酸钠溶液中晶体附聚机理研究

本文研究了铝酸钠溶液中晶体的附聚机理。认为晶体的附聚过程为：晶体中粒度相对最小且粒度相近的粒子发生附聚，形成略大些颗粒，略大一些颗粒且粒度相近的粒子又发生附聚，这样依次实现的过程，直到溶液过饱和度不能满足对应粒级粒度粒子发生附聚的要求为止。     

多孔有机膨润土颗粒研制及对PO3-4的吸附研究

将易燃微粉按一定比例混入膨润土中,挤压造粒,高温灼烧,再用阳离子表面活性剂改性,得到多孔有机膨润土颗粒.将其用于对PO3-4离子的吸附,研究了酸度、吸附时间、PO3-4离子的初始浓度对吸附反应的影响,指出该吸附过程符合Langmuir吸附等温方程.     

原地浸出采铀的数学模型

本文介绍原地浸出数学模型的基本条件、化学反应的处理方式，并以酸浸六价铀为例建立了较系统的数学方程。     

聚氨酯弹性体筛板在圆振动筛的应用试验

介绍了聚氨酯弹性体筛板在棒磨山铁矿重型振动筛上的应用试验过程，分析了不同形式筛板结构的试验结果，并从使用性能和成本的角度进行比较，提出了预张紧筛板结构在重型振动筛上有很高的应用推广价值。     

'EUROPART'. Airborne particles in the indoor environment. A European interdisciplinary review of scientific evidence on associations between exposure to particles in buildings and health effects

The relevance of particle mass, surface area or number concentration as risk indicators for health effects in non-industrial buildings has been assessed by a European interdisciplinary group of researchers (called EUROPART) by reviewing papers identified in Medline, Toxline, and OSH. Studies dealing with dermal effects or cancer or specifically addressing environmental tobacco smoke, house dust-mite, cockroach or animal allergens, microorganisms and pesticides were excluded. A total of 70 papers were reviewed, and eight were identified for the final review: Five experimental studies involving mainly healthy subjects, two cross-sectional office studies and one longitudinal study among elderly on cardiovascular effects. From most studies, no definite conclusions could be drawn. Overall, the group concluded that there is inadequate scientific evidence that airborne, indoor particulate mass or number concentrations can be used as generally applicable risk indicators of health effects in non-industrial buildings and consequently that there is inadequate scientific evidence for establishing limit values or guidelines for particulate mass or number concentrations.