由于垂直布置的 GIS 设备、罐式断路器及瓷柱式断路器等开关类设备安装位置较高, 现有 X 射线成像系统自带辅助装置在高度和角度上不能满足现场 X 射线成像检测需求。本文开发了一种高度、角度可调的移动式 X 射线成像系统辅助设备,并成功应用于 330 kV 瓷柱式断路器 X 射线成像检测中。应用结果表明:该装置不仅提高了 X 射线成像检测的效率,而且保证了试验人员安全性,为 X 射线成像检测技术的推广应用提供了帮助。 相似文献
While progress has been made in reducing external nutrient inputs to the Baltic Sea, further actions are needed to meet the goals of the Baltic Sea Action Plan (BSAP), especially for the Baltic Proper, Gulf of Finland, and Gulf of Riga sub-basins. We used the net anthropogenic nitrogen and phosphorus inputs (NANI and NAPI, respectively) nutrient accounting approach to construct three scenarios of reduced NANI-NAPI. Reductions assumed that manure nutrients were redistributed from areas with intense animal production to areas that focus on crop production and would otherwise import synthetic and mineral fertilizers. We also used the Simple as Necessary Baltic Long Term Large Scale (SANBALTS) model to compare eutrophication conditions for the scenarios to current and BSAP-target conditions. The scenarios suggest that reducing NANI-NAPI by redistributing manure nutrients, together with improving agronomic practices, could meet 54–82% of the N reductions targets (28–43 kt N reduction) and 38–64% P reduction targets (4–6.6 kt P reduction), depending on scenario. SANBALTS output showed that even partial fulfillment of nutrient reduction targets could have ameliorating effects on eutrophication conditions. Meeting BSAP targets will require addressing additional sources, such as sewage. A common approach to apportioning sources to external nutrients loads could enable further assessment of the feasibility of eutrophication management targets.
Environmental Science and Pollution Research - Groundwater has been recognized as one of the most critical and vulnerable natural sources which is utilized in potable water supply, agricultural... 相似文献
Environmental Science and Pollution Research - The concentrations of major and trace elements in the sediments from the Four River inlets of Dongting Lake were analysed. The results show that the... 相似文献
Environment, Development and Sustainability - Textiles release microfibers to the environment during production, use, and at end-of-life disposal. There is a potentially large and growing risk to... 相似文献
Sable (Martes zibellina) and stone marten (Martes foina) populations are declining sharply and both species are threatened in China. Knowing the sex ratio of a population is important for long-term conservation and development of management plans for endangered marten species. We here describe the application of a novel PCR-RFLP method for sex determination in these two marten species. We developed a new designed primer pair (ZFLB1 and ZFLB2) that yields a smaller ZFX/ZFY PCR product (246 bp), which in combination with RFLP analysis, provides a simple and reliable method for gender determination in Martes zibellina and Martes foina. The method can be used on tissue and non-invasively collected hair samples for sex identification in wild marten populations, and is powerful for monitoring population status and trend of endangered martens. 相似文献