不同于高孔高渗的砂岩地层,中低孔低渗砂岩储层孔隙结构较为复杂,孔渗关系不再趋向为一条单一的直线,而是随孔隙度变小而发散,单一......

根据山东省雷达回波资料，天气和灾情实况，统计了回波顶高Ｈｍ强回波区顶高Ｈｚ回波强度Ｚ与降雹概率的关系，给出单，双参数判别雹云的指标，提出用３参......

Probability criterion has its practical significance, and its investment decision-making is determined by the expected d......