Monsoon circulation related to enso phase-locking

The relation of interannual anomaly of East Asian monsoon to the ENSO cycle is investigated in terms of even and odd symmetry analysis over a tropical heating field based on the past 30-year data. Evidence suggests that odd and even symmetry components related to the monsoon and Walker heating, respectively, effectively describe the East Asian monsoon circulation and Pacific Walker analog, with the monsoon intensity index corresponding to its heating vigor and western Pacific Walker heating vigor to ENSO phase change, both types of heating marked by pro-nounced seasonal variation and phase-locking; the key region for linking monsoon-ENSO interaction is the western Pacific warm pool; the monsoon effect upon ENSO cycle is affected jointly by the seasonal evolution and interannual anomaly of the heating components; the superimposition of an anti-Walker circulation phase produced by interannual winter monsoon perturbation upon a weaker Walker phase on a seasonal basis leads to an El Nino hap-pening in March-April and plays a significant role in maintaining a warm ENSO phase.     

抗差泛岭估计

本文应用现代估差估计理论,提出了一个抗差有偏估计类（抗差泛岭估计类）并且建立了抗差泛岭估计的计算方法。理论分析和模拟计算表明,抗差泛岭估计具有既可克服法矩阵病态性影响又可抵抗粗差干扰的良好性质。     

Estimating the Degree of Earthquake Risk from Fault Characteristics

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影响江淮地区的西南涡中尺度结构特征

利用合成方法对３次西南涡过程的流场，温湿场和涡度场等进行了分析。结果指出：沿切变线存在风场的中尺度扰动，低涡的尺度为２５０－３００ｋｍ，中低层有两支不同性质的气流流入低涡区，降水主要发生在低涡移动方向右侧的两象限。温湿场和铅直流场在低涡区呈现明显的不对称分布，低涡是一个显著的斜压系统。     

1989年大同6.1级地震前山西带小震活动时间分布结构多重分形维数的变化特征

本文应用多重分形理论研究了1989年大同6.1级地震前山西地震带(简称山西带,下同)小震活动时间分布结构的变化特征,发现震前各D_q值均有降维异常出现,且D_(+q)(q>0,下同)的异常尤为突出,取不同层次的地震样本进行计算其异常形态基本一致,表明震前小震活动时间分布从无序向有序转变所显示的内在结构异常变化是真实可靠的,这对我们今后地震分析预报的研究或许是有所裨益的.     

An Experimental Styudy on Gold Solubility in Amino Acid Solution and Its Geological Significance

The experiments on gold solubility in amino acid solution mdicate that gold is very intensively soluble in amino acid(or other organic acids),which is extensively present in geological bodies,and is most soluble in histidine.The temperature and concentration,acidity and type of amino acid in the solution are important factors affecting gold-amino acid complexing. The solubility of gold in amino acid is different under different conditions of temperature, amino acid concentration and pH value of the solution,At 80℃ and pH=6-8,gold is most soluble in amino acid.Gold dispersed in water and rocks could be concentrated and transported by amino acid and then precipitated in favorable loci.Amino acids might have played an important role in metallogenesis as well as in the formation of source beds of gold.Nitrogen,oxygen and sulfur in amino acid might have reacted with gold to form soluble complex ions.     

辽河盆地西部凹陷下第三系原油和生油岩的生物标记化合物研究

本文应用色谱-质谱和气相色谱等技术分析鉴定了辽河断陷盆地西部凹陷下第三系原油和生油岩饱和烃中的甾、萜烷等生物标记化合物。并利用甾、萜烷等生物标记化合物和其它地质、地球化学资料,讨论了油、岩的生物先体性质,将其做了分类对比,确定了沙河街组、东营组和前中生界潜山原油的原生性和次生性。     

信息综合集成方法在短期地震预报中的应用

本文将地震过程视为一个复杂系统,随着孕震过程的发展,系统从平衡态向着远离平衡态方向发,不稳定性增大,并向着失稳态接近,这时大量前兆发生发展,复杂发生增加。文中应用系统科学中的信息集成方法分析前兆异常,确定异常综合,用统一的系统叁量概率合成、信息熵、有序度等作为系统由向非过渡的标志。结果表明,用信息综合集成方法分析后的异常反映了孕震过程演变到短期阶段。该方法为短期地震预报提供了较为可靠的依据,具有实     

复杂河网水沙数学模型研究

根据节点水沙平衡和能量衔接条件,在单一河道水沙数学模型的基础上,建立了可以适用于一般河网体系水沙数值计算的数学模型,并采用荆江-洞庭湖的相关资料进行了验证。结果表明,模型的计算值与实测值吻合较好,说明对荆江-洞庭湖区域复杂边界条件的处理是合适的,所建模型具有较好的适用性。     

基于SDE的全关系空间数据库的实现

在介绍空间数据库和ESRI空间数据库引擎SDE(SpatialDatabaseEngine)的基础上,分析了把空间数据和属性数据集中存放于RDBMS的数据组织方式,论述了在企业级分布式应用系统中,空间数据的空间分析方法,以及空间数据的索引和查询方法。