淮南市区浅层地下水求参公式的建立

根据淮南市区浅层地下水埋深浅，滞后效应小等特点，推导出一套实用的水文参数计算公式，包括：降水入渗补给地下水系数ａ，蒸发极限深度Ｌ，蒸发系数Ｃ，以及浅层地下水的给水度ｕ的计算公式。     

跃变型扩散的实验研究

本文为一次沿海岸边翻越二维山丘的扩散实验.结果表明:在一定条件下,假若两层空气的湍流强度和尺度的比值不大,当烟羽从上层侵入到下层较强混合气层时,不一定产生燻烟型扩散,仅表现为扩散参数在一定水平距离上的跃变.本文同时介绍了两组风洞实验的结果,其目的在于说明扩散参数跃变存在的事实.     

浅源强震的判据和发震概率

根据确定潜在震源区的多判据原理,强震的发生不仅要满足准静态强度条件,而且必须具备突发释放足够能量的条件,而所有这些条件可以通过突发应力降判据、总能量判据和强度判据加以表达。本文建立了它们相应的概率表达式和估计发震总概率的方法,并针对我国28例地震进行了验算     

澜沧—耿马地震震源动力学参数研究

本文使用沧澜—耿马地震主震后在震区建立的数字地震仪记录,用波谱法测算澜沧—耿马余震的震源动力学参数。就这些参数的统计特征,对该双主震型两主震区的地下介质不同状态予以讨论。     

Rainfall estimation using raingages and radar — A Bayesian approach: 1. Derivation of estimators

Procedures for estimating rainfall from radar and raingage observations are constructed in a Bayesian framework. Given that the number of raingage measurements is typically very small, mean and variance of gage rainfall are treated as uncertain parameters. Under the assumption that log gage rainfall and log radar rainfall are jointly multivariate normal, the estimation problem is equivalent to lognormal co-kriging with uncertain mean and variance of the gage rainfall field.The posterior distribution is obtained under the assumption that the prior for the mean and inverse of the variance of log gage rainfall is normal-gamma 2. Estimate and estimation variance do not have closed-form expressions, but can be easily evaluated by numerically integrating two single integrals. To reduce computational burden associated with evaluating sufficient statistics for the likelihood function, an approximate form of parameter updating is given. Also, as a further approximation, the parameters are updated using raingage measurements only, yielding closed-form expressions for estimate and estimation variance in the Gaussian domain.With a reduction in the number of radar rainfall data in constructing covariance matrices, computational requirements for the estimation procedures are not significantly greater than those for simple co-kriging. Given their generality, the estimation procedures constructed in this work are considered to be applicable in various estimation problems involving an undersampled main variable and a densely sampled auxiliary variable.     

Three dimensional velocity structure beneath the Kunming Telemetered Seismic Network

Ｔｈｒｅｅ　ｄｉｍｅｎｓｉｏｎａｌ　ｖｅｌｏｃｉｔｙ　ｓｔｒｕｃｔｕｒｅ　ｂｅｎｅａｔｈ　ｔｈｅ　Ｋｕｎｍｉｎｇ　Ｔｅｌｅｍｅｔｅｒｅｄ　Ｓｅｉｓｍｉｃ　Ｎｅｔｗｏｒｋ（王椿镛）（王溪莉）（颜其中）Ｔｈｒｅｅｄｉｍｅｎｓｉｏｎａｌｖｅｌｏｃｉｔｙｓｔ...     

《中国地震目录》补记

以国内各地宏观地震记载为线索，查阅同日徐家汇地震台地震记录，从中发掘出一批１９０５－１９４９年间现有目录中没有或无测震依据的中强地震，共６０余次，丰富了现有地震目录，可供地震研究和工程建设时参考使用。