This paper realizes the automatic generation of the test case in the structure coverage test, which takes use of the iterative relaxation method as key algorithm.

利用迭代松弛法作为核心算法实现了结构覆盖测试用例的自动生成。

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The relaxation iterative method for solving branch river networks is extended, which can turn the problem of any complex river networks into the problem of a series of single rivers.

将支流流量的松弛迭代方法从树状河系推广到了环状河网，使任意复杂河网水力计算的问题都可化为一系列的单一河道的水力计算问题；

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The algebraical equations obtained from the difference equations are solved by the line relaxation iterative method.

差分方程形成的代数方程组用线松弛迭代求解。

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