Least square method of polynomial or the method based on the given function are used to fit pump characteristic curve in pump selection or operation.

在水泵的选型或运行中，通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。

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This method is more suitable for pump cavitation performance curve fitting.

该方法较适合于泵汽蚀性能曲线的拟合。

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From the performance perspective, the type of impeller and the general efficiency closed impeller or less the same, but the type of impeller pump head curve dropped more.

从性能上讲，该型式叶轮效率高和普通闭式叶轮相差不大，但用该型式叶轮泵扬程曲线较为陡降。

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However, just the anticipation of additional quantitative easing and still lower long-term interest rates has already potentially begun to pump up the next bubbles, as investors have moved out the risk curve in an effort to find higher rates of return.

FORBES: Fed Still Blowing Bubbles?