standard sum
3.It discusses control system of boiler feed pump with variable speed and analysis the controlled object by Bristol-skinkey , and the controlled object is decoupled by V standard structure ,decoupled equivalent controlled objects are tuned and adjusted by sum time constant approach, the control system are simulated by computer, step response curves are given.
4.An improved hard-sphere model predicted rightly the changing trend of the standard partial molar volume of alkyl chain of amino acids with concentration of electrolyte, and confirmed the assumption that the sum of standard partial molar volumes of CH and CH3 groups is twice as many as the standard partial molar volume of CH2 group.
5.At the same time the EBC is an important content in the flux research. To evaluate the EBC, the methods of linear regression, the energy balance ratio (EBR) and the energy imbalance standard deviation were adopted in this paper. In this study site the sum of available energy and turbulent energy in a whole year were 2 798.28 and 2 332.70 MJ·m -2, respectively.
9.When fly ash proportion reaches to 50% of binder sum,hardening accelerator proportion reaches to 1.5%,SX-Superplasticizer proportion reaches to 1.15%,3 day compressive strength of concrete can reach to 11.9 MPa,7 day compressive strength of concrete can reach to 18.5MPa,28 day compressive strength of concrete can reach to 36.5MPa in standard curing condition.
