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The Forecaet of Strengrh of Slag Cement

Zhou Zhiyuan (Department of Mathematics)  
when the compression strength of slag cement on seventh day is forecasted by it on firet day and the ratio of slag in the cement, the forecast equation is usually a two degree equation will three variables. After transformation, it is became into the regression of equation with two variable so as to be established and calculated easily. Thio mathod would be ussd to guide the slag cement production in order to improve quality of slay cement.
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