Periodical analysis showed that abrupt change of sediment load happened in 1968 and 1984, which divided the variation process of river sediment load into three stages.
中国主要河流入海泥沙还具有明显的三个阶段变化特征，即分别在1968年和1984年前后发生了突变。
General mechanic differences and methods of dynamic response analysis of RC structure characterized by abrupt change in horizontal connection stiffness are discussed.
探讨具有水平连接刚度突变特征的钢筋混凝土结构的一般力学特点与动力反应分析方法。
General mechanic differences and methods of dynamic response analysis of RC structure characterized by abrupt change in horizontal connection stiffness are discussed.
探讨具有水平连接刚度突变特征的钢筋混凝土结构的一般力学特点与动力反应分析方法。
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