Zhou Shiqiong

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The third order of the high frequency parts of the whole wind speed are changed greatly, it is the input of wind turbine. The input determines the control value, so the control value is changed greatly in short time. The controller has the determine time to work. Hence, the input prediction control is introduced. Simply the wind speed is composed by basic(More)
The addition of ultra-fine fly ash (UFA) to cement paste, mortar and concrete can improve their fluidity, but some coarse fly ash can’t reduce water. This paper investigates the effect of fineness and replacement levels of fly ash on the fluidity of cement paste, mortar, and concrete. The fly ash is collected by electro-static precipitators and airflow(More)
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