立体视觉的摄影测量理论

从引入空间投影变换的概念入手,证明了体积之交比为一般的投影不变量,从而将其作为描述物体的度量。通过对基础矩阵进行合适的分解,导出了确定投影变换模型之齐次坐标和投影坐标的方法。提出了三维直接线性变换用于由物体的投影变换模型进行物体重建。实验分析证实了所述理论和方法的正确性。     

甘肃老虎山闪长岩的地球化学特征及其成因

位于北祁连造山带东端的老虎山闪长岩侵位在晚奥陶统阴沟群砂板岩中,闪长岩的单颗粒锆石Ｕ－Ｐｂ年龄为４２３．５±２．８Ｍａ,是中志留世侵位的。老虎山闪长岩属于钙碱性岩系,富集ＬＲＥＥ和大离子亲石元素（ＬＩＬＥ）,Ｃｅ／Ｙｂ比值大于１３,Ｔｈ／Ｔａ比值大（１３～４２）,在微量元素分布图中呈现明显的Ｎｂ负异常,具岛弧或活动陆缘环境的特征。虽然老虎山闪长岩具有岛弧地球化学特征,但并不能认为它就产于岛弧环境,因为,在奥陶纪末期,早古生代的北祁连洋盆已经发生闭合,华北板块与柴达木板块已发生碰撞。因此,老虎山闪长岩是造山后侵位的,其成因可能与岩石圈拆沉作用有关。     

凹凸棒石粘土吸附铀的性能研究及应用

本文研究了凹凸棒石粘土吸铀的酸度,吸附速率、肿附反应热焓吸附容量等性能,确定了吸附铀的最佳条件,并采用动态法片处理了含铀废水,效果良好,钱的去除率在９９．９５％以上,排放液中的铀的残余浓度达到国家规定的０．０５ｍｇ／Ｌ排放标准。     

多途径解决我国钾盐资源紧缺的对策探讨

探讨了钾盐矿产的应用,钾盐矿产在世界及我国的分布状况,提出了解决我国钾盐矿产资源紧缺问题的途径。     

淮河流域洪涝变化吸引子维数研究

淮河流域洪涝序列的功率谱表现出了较好的混沌谱特征,这是序列呈分形结构的内在原因。洪涝序列及其不同平滑序列的关联维数表明,序列平滑程度越大,关联维数越小,关联维数反映了序列所在系统的层次,是系统结构复杂性的重要量度,是 系统建模所需独立变量的控制参数。要恰当地描述淮河流域洪涝发生系数,需构造至少５个状态变量的动力学系统。     

苍山5.2级地震前十里泉电厂井地下水离子多组分的变化特征及机制讨论

１９９５年９月２０日山东苍山５．２级地震前,山东枣庄十里电厂水化学现观测井（Δ＝ｋｍ）水离子多组分出现了较为同步的异常变化。本文以此为基础,分析研究了这些异常的变化特征,讨论了异常出现的机制,研究认为,枣庄十里泉电厂水化学观测井水离子多组分的异常同步变化及相互印证,提高了异常的可信度;与水中常见离子组分相比,其中水汞的震前异常变化幅度最大,异常特征明显;十里泉电厂水化学观测井水离子多组分的同步异常     

玛纳斯县城高危震害小区的综合判定

在以玛纳斯县城各居委会小区为单元进行震害预测的基础上,分析了人员伤亡数量,社会财富和无家可归人数三项指标在评判高危震害小区中占有的地位。建立了高危震害小区判定指标公式。指出了玛纳斯县城内的第４,第９居委会小区为高危震害小区。把对高危震害小区的判定从单一定性化推向综合定量化做了一次尝试。     

新疆破坏性地震损失“盲估”方法

通过总结新疆近年来的震害预测研究成果和震害损失评估工作的实践,给出了震后损失快速评估方法－“盲估”方法。提出今后震灾评估的发展方向是建立震后趋势快速判定计算机管理系统。     

Numerical simulations of transport of non-ergodic solute plumes in heterogeneous aquifers

Transport of non-ergodic solute plumes by steady-state groundwater flow with a uniform mean velocity, μ, were simulated with Monte Carlo approach in a two-dimensional heterogeneous and statistically isotropic aquifer whose transmissivity, T, is log-normally distributed with an exponential covariance. The ensemble averages of the second spatial moments of the plume about its center of mass, <S _{i i} (t)>, and the plume centroid covariance, R _{i i} (t) (i=1,2), were simulated for the variance of Y=log T, σ _Y ²=0.1, 0.5 and 1.0 and line sources normal or parallel to μ of three dimensionless lengths, 1, 5, and 10. For σ _Y ²=0.1, all simulated <S _{i i} (t)>−S _{i i} (0) and R _{i i} (t) agree well with the first-order theoretical values, where S _{i i} (0) are the initial values of S _{i i} (t). For σ _Y ²=0.5 and 1.0 and the line sources normal to μ, the simulated longitudinal moments, <S ₁₁(t)>−S ₁₁(0) and R ₁₁(t), agree well with the first-order theoretical results but the simulated transverse moments <S ₂₂(t)>−S ₂₂(0) and R ₂₂(t) are significantly larger than the first-order values. For the same two larger values of σ _Y ² but the line sources parallel to μ, the simulated <S ₁₁(t)>−S ₁₁(0) are larger than but the simulated R ₁₁ are smaller than the first-order values, and both simulated <S ₂₂(t)>−S ₂₂(0) and R ₂₂(t) stay larger than the first-order values. For a fixed value of σ _Y ², the summations of <S _{i i} (t)>−S _{i i} (0) and R _{i i} , i.e., X _{i i} (i=1,2), remain almost the same no matter what kind of source simulated. The simulated X ₁₁ are in good agreement with the first-order theory but the simulated X ₂₂ are significantly larger than the first-order values. The simulated X ₂₂, however, are in excellent agreement with a previous modeling result and both of them are very close to the values derived using Corrsin's conjecture. It is found that the transverse moments may be significantly underestimated if less accurate hydraulic head solutions are used and that the decreasing of <S ₂₂(t)>−S ₂₂(0) with time or a negative effective dispersivity, defined as , may happen in the case of a line source parallel to μ where σ _Y ² is small.