新生单体在中空发展成降雹单体的一次过程分析

根据2002年8月5日新疆昭苏盆地的雷达回波资料，对该雹云初始雷达回波的出现及演变过程的主要特征进行分析。     

基于几何约束的GPS测姿系统的原理和实验

详细描述了GPS测姿系统的原理,并给出了一种基于基线长度约束和空间几何约束的最小二乘模糊度搜索算法,并经过静态和动态车载试验证明GPS测姿系统切实可行,在基线长度为3m的条件下,航向角精度优于0.1°。     

GPS接收机天线相位中心偏差的三维检定研究

根据GPS接收机天线相位中心的几何关系，在超短基线相对定位法的基础上，利用旋转天线，结合精密水准测量，给出了一种天线相位中心偏差三雏检验的方法。实例表明，该方法具有较高的精度和可靠性，适合于在野外对GPS接收机天线相位中心偏差进行实际检定。     

GPS接收机噪声对天线相位中心检测的影响分析

利用四天的零基线观测数据，截取不同时间长度的数据段，解算出北方向、东方向、高程方向的偏差量△N、△E、△U，对这些偏差量进行统计分析和误差分析。     

局地冰雹防御效果分析

利用2000年5月22日一次局地性冰雹过程的雷达回波资料，对防雹作业前后的回波进行对比分析，结果发现，作业后强回波面积明显减小、高度明显降低。说明人工防雹作业能够有效地遏制雹云发展，减轻或防止冰雹灾害。     

Determination of Antibiotic Residues in Manure,Soil, and Surface Waters

In the last years more and more often detections of antimicrobially active compounds (“antibiotics”) in surface waters have been reported. As a possible input pathway in most cases municipal sewage has been discussed. But as an input from the realm of agriculture is conceivable as well, in this study it should be investigated if an input can occur via the pathway application of liquid manure on fields with the subsequent mechanisms surface run‐off/interflow, leaching, and drift. For this purpose a series of surface waters, soils, and liquid manures from North Rhine‐Westphalia (Northwestern Germany) were sampled and analyzed for up to 29 compounds by HPLC‐MS/MS. In each of the surface waters antibiotics could be detected. The highest concentrations were found in samples from spring (300 ng/L of erythromycin). Some of the substances detected (e.g., tylosin), as well as characteristics in the landscape suggest an input from agriculture in some particular cases. In the investigation of different liquid manure samples by a fast immunoassay method sulfadimidine could be detected in the range of 1…2 mg/kg. Soil that had been fertilized with this liquid manure showed a content of sulfadimidine extractable by accelerated solvent extraction (ASE) of 15 μg/kg dry weight even 7 months after the application. This indicates the high stability of some antibiotics in manure and soil.     

中国地震台网、全球地震台网地震目录数据库和震相数据库

地震目录和震相数据在地震学研究中具有重要意义，本文介绍了中国地震台网、全球地震台网地震目录数据库和震相数据库的内容和查询使用方法。     

HPLC-DAD-FD联用检测油气化探样品的芳烃

在成功实现HP1090型高效液相色谱仪(拥有DAD)和LS50型荧光分光光度计连接的基础上,建立了一套适合于检测油气化探样品中芳烃组分的高效液相色谱分析方法,大大提高了检测方法的选择性和灵敏度.该技术不仅解决了油气化探样品中芳烃组分的定性定量问题,提高了油气预测的准确性,而且也可在油与油、油与源对比,探索油气运移特征等有机地球化学研究中发挥重要作用.     

粘土矿物X射线衍射相定量分析方法与实验

粘土矿物的物相定量分析在地质研究中有着广泛的应用。本概述了该方法的原理和特点，并讨论了实验中要注意的问题，在对实验结果做了分析之后认为：用x射线衍射方法解决粘土矿物的物相定量问题，虽然只能给出半定量的结果，但是它简单、快捷、重复性好，且有行业标准为依据，仍不失为一种地质研究中常规的物相定量分析方法。