广东沿海牡蛎体总铬的含量水平与时空分布特点

1989～1997年于广东沿海设12个牡砺采样点,研究广东沿海牡蛎体总铬的含量水平、地理分布特点和变化趋势。全部牡蛎样品的总铬含量均远低于海洋生物污染评价标准值,属正常本底水平或轻微污染水平。牡蛎体总铬含量的地理分布特点是珠江口海区≥粤西海区＞粤东海区。1989～1991年间,牡蛎体总铬的平均含量呈下降趋势;1991～1994年间,牡蛎体总铬的平均含量年际间虽有波动,但没有显著变化;1994年以后,牡蛎体总铬的平均含量呈上升趋势。     

总磁场强度的空间相关及北黄海ML5.0级地震异常

清理攻关后，虽然相关系数法被列为地磁学科预报地震的方法之一，但应用性较差，且震例不多，为了探讨该种方法预报地震的效果，本文对辽宁地区总磁场强度进行了空间相关分析。     

煤成油有机岩石学研究进展

阐述了煤成油研究对挖潜和扩大石油的勘探范围，完善和发展石油勘探理论都具有重要的现实和理论意义，并从有机岩石学观点出发，对煤成不同的研究现状和进展进行了评述。     

利用空间均匀网格对中国夏季降水异常区域特性的初步分析

用方差极大正交转动ＥＯＦ（Ｖａｒｉｍａｘ　ＥＯＦ）及点相关图法分析了夏季总降水（６、７、８月降水之和）及逐月降水的区域特性。使用的资料为全国范围４７个５°×５°经纬度网格上的降水资料，分析时段为１９５９—１９９４年。分析结果表明，由于采用了空间均匀的格同资料，本分析除进一步证实了中国东部地区降水异常的区域特性外，也揭示了西部地区降水异常的区域特性及沿长江流域东西方向上降水异常的相互关系。夏季总降水异常最显著的区域特性是江淮流域与河套及华南反相关。另外沿长江流域，四川盆地的降水异常与青藏高原东部及江淮流域的降水异常也存在着反相关联系。西部地区的区域特性为青藏高原中东部南北两侧为负相关，并且青藏高原中东部南侧的降水异常与华北东部及东北南部为正相关。上述的空间模都有准２—３ａ及１０ａ左右的周期。逐月降水的分析表明，６月份，江淮流域、华北东部及东北大部分地区为正相关。７月，河套地区与江淮流域的降水异常呈现一定的负相关联系，８月份降水异常的区域特性与夏季总降水异常的区域特性极其一致。     

黄土地区气候演变的有机地球化学标志

对渭南阳敦黄土剖面Ｓｏ￣Ｌ２层段作了总有机碳（ＴＯＣ）和Ｒｏｃｋ－Ｅｖａｌ热解烃分析，建立了ＴＯＣ气候变化曲线及其变化周期，与其它气候指标进行了对比，揭示了黄土剖面中与气候变化有关的两种烃类，推导并验证了古湿度公式，计算了各层段的湿度分布及其演变趋势。     

自由设站的高效测设技术研究

本文在开发研究全站型电子速测仪的专用功能的基础上，结合工程测施工放样的若干应用，提出了一系列自由设站的高效，实用的测设方法。     

Prediction possibilities of Arosa total ozone

Using the periodicities obtained by a Maximum Entropy Spectral Analysis (MESA) of the Arosa total ozone data (CC) series for 1932–1971, the values predicted for 1972 onwards were compared with the observed values of the (AD) series. A change of level was noticed, with the observed (AD) values lower by about 7 D.U. Also, the matching was poor in 1980, 1981, 1982. In the monthly values, the most prominent periodicity was the annual wave, comprising some 80% variance. In the 12 month running averages, the annual wave was eliminated and the most prominent periodicity wasT=3.7 years, encompassing roundly 20% variance. This and other periodicities atT=4.7, 5.4, 6.2, 10 and 16 years were all statistically significant at a 3.5a priori i.e., 2a posteriori level. However, the predictions from these were unsatisfactory, probably because some of these periodicities may betransient i.e., changing amplitudes and/or phases with time. Thus, no meaningful prediction seem possible for Arosa total ozone.     

高频多普勒台阵中的若干技术问题

为了研究电离层动力学特性,1985年9月在武汉建成了一个由三个台站组成的高频多普勒台阵和卫星信标法拉第台阵。文中介绍了这个台阵的布局和多普勒接收系统中的一些技术细节。这些技术措施保证了在多普勒图中清晰地显示多径现象和有效地消除小不均匀体的影响。最后还简单地介绍了这个台阵一年来的实测情况。     

主动式集成GPS滑坡监测系统的研制与监测实践

主动式集成GPS滑坡监测系统是GPS技术与电子全站仪技术的高度集成。本文叙述了主动式集成GPS滑坡监测系统的基本原理与工作过程。     

Alkaline Degradation of Dissolved Organic Matter

The degradation of dissolved organic matter (DOM) was studied in alkaline solution. The products were characterised using UV/vis spectroscopy, size‐exclusion chromatography (SEC), and by the analysis of low‐molecular‐weight organic acids (LMWOA). The degradation experiments were performed with water from a brown water lake or its isolated fulvic acid fraction and sodium hydroxide at different reaction times and temperatures. Depending on the wavelength and the reaction time, the UV/vis absorbance between 230 nm and 600 nm increased or decreased. The behaviour of model compounds during reactions in alkaline media was compared to the UV/vis spectroscopic behaviour of DOM. The release of LMWOA was described by kinetic data and compared to the data of model reactions. Evidence was given for the carboxylic esters playing a significant role in the release of LMWOA only during the beginning of the alkaline degradation. The results gained by SEC with on‐line UV and DOC detection showed that the average size of DOM was decreasing, and that a major part of the degradation products consisted of low‐molecular‐weight mono‐ and dicarboxylic acids.