【单选题】There are eight analog signals, each of bandwidth B=2kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
【单选题】There are eight analog signals, each of bandwidth B=4kHz. Samples of these signals are time-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0....
【简答题】A
440-V 50-Hz two-pole Y-connected induction motor is rated at 85 kW.
The equivalent circuit
parameters are R 1 = 0.105 Ω R 2 = 0.065 Ω X m = 7.9 Ω X 1 = 0.17 Ω X 2 = 0.17 Ω P F&W = 1.6 k...
【简答题】Assume that both portfolios A and B are well diversified, that E ( r A ) =12%, and E ( r B ) =9%. If the economy has only one factor, and β(A) =1.2, whereas β(B)=0.8, what must be the risk-free rate?
【单选题】For a transmission line supplying a load with a lagging power factor, the sending and receiving end voltages are V_S=11.8 kV and: V_R=11.0 kV. What is the voltage regulation, stated as a percentage?