The diversity of flood elements and complexity of flood are analyzed Two methods for classifying flood grades by flood recurrenceinterval or peak discharge of standard area are put forward in this paper And, the flood grades of the Yangtze River drainage basin in 1998 are analyzed
分析了洪水要素的多样性和洪水的复杂性,提出了利用洪水重现期划分洪水安全度等级和利用标准面积洪峰流量划分洪峰标准等级的两种方法,并对1998年长江流域的洪水等级进行了简要分析。
In this paper a method based on enthalpy intervals of composite curves is presented for area targeting of Heat Exchanger Network in the presence of stream split constraints.
基于组合线能量分区的概念,提出分流约束条件下换热网络的面积目标计算方法。
