紫外脉冲荧光法测定微量铀的研究

紫外脉冲荧光法是一种通过液体激光来直接测定微量铀的方法。在采用紫外脉冲荧光法分析面包酵母吸附放射性核素铀后溶液剩余铀浓度之前,研究了荧光增强剂、pH 值、以及温度对微量铀浓度工作曲线的影响。结果表明:当pH > 3时,400 μL 荧光增强剂可以充分缓冲溶液,不同pH 值下测得的荧光计数基本保持恒定,即待测溶液pH值不会影响铀浓度的测量;随着温度的升高,荧光计数近似线性下降,并在室温23.6℃时得到了铀质量浓度范围为0:120 μg/L 的工作曲线。在此基础上研究了酵母菌对放射性核素铀的吸附作用,为使吸附剂达到最高效利用,对溶液pH 值、吸附速率进行了批次实验,并通过紫外脉冲荧光分析法进行测量, 发现达到吸附平衡所需的最短时间为180 min,吸附的最佳溶液pH 值为5.8 左右。The method of pulse ultraviolet fluorescence was employed to analyze the concentration of radioactive nuclide uranium after adsorbed by baker’s yeast. Influences of fluorescent enhance reagent, pH value, and temperature on measurement of the concentration of trace uranium were investigated. The results showed that 400 μL fluorescent enhance reagent was greatly enough to buffer the solution when pH > 3 and the counts of fluorescence kept constant with the variation of pH, which indicates that the pH of solutions doesn’t affect the determination of uranium concentration, moreover, the counts of fluorescence declined linearly as the increase of the temperature. In addition, the working curve of the determination of uranium concentration within 0.1 20 μg/L was obtained when the temperature was 23.6 ℃. On this basis, the adsorption of uranium by baker’s yeast was studied. For the adsorption of radioactive nuclides of uranium by baker’s yeast to achieve the best use, the batch experiments were carried out on the rate of adsorption and pH of solutions. The method of pulse ultraviolet fluorescence was used to measure and found that the minimum time required to reach adsorption equilibrium was 180 min and the optimum pH value of solutions was about 5.8.     

气象卫星数据接收处理流程简化模式设置

介绍了气象数据卫星广播接收系统（CMACast系统）数据接收机与Micaps数据接口在基层气象台站应用的一种简化模式、设置方法以及维护注意事项。此种模式与传统模式相比,不仅节约了硬件成本,简化了气象卫星资料传输、处理和存储流程,而且便于日常操作和维护。     

开源架构下的气象数据机房动环监控系统设计

数据机房是保障气象数据传输和服务的核心,良好的机房环境是保证业务稳定运行的重要前提。传统人工定时巡检机房的运维方式存在很大程度的人力浪费,且不能对机房环境进行动态和实时监控,实际运维效率不高。文章基于Zabbix监控系统,结合Python语句设计从数据采集,数据监控告警,可视化显示的数据机房环境监控系统,实现了对机房动环关键要素的全天候、可视化监控,帮助运维人员及时发现和处理故障,提升机房环境的综合管理能力。