水位摘录数学模型的探讨

Mathematical model of water extract

在处理自计水位摘录过程中,经过大量开发实践,建立起以时间为横坐标t,水位为纵坐标z的平面直角坐标系,把测流、取沙等加测水位、峰谷水位、8：00水位作为必摘水位数据点,求出相邻的必摘（或已摘）水位之间的水位数据点到这两个必摘（或已摘）数据点连线的最大垂直距离水位差△h,如果△h超过允许的值（可调）就把这个数据点摘录下来,否则就视为一条直线,一般只需自动循环摘录3~4次就能全部摘完,程序语句简洁。

In dealing with water extracted ofrecording water-gauge,based on a lot of development practices,established the Cartesian coordinate system with the time of the abscissa t,the water level of the vertical axis,the flowmeasurement,measuring the water level increases to take sand,etc.,peak water level,8：00 level as the water level will pick the data points,find the pick must be adjacent to（or pick）the water level data points to the water level between the two will pick（or pick）to connect data points from the maximum vertical water level difference △h,if△h exceed the permitted value（adjustable）put the extracted data points down,oth erwise regarded as a straight line,circle,only to automatically extract three times （up to 4 times）will be able to pick all finished,clever idea,program statement simple.