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【简答题】
1939年,柏格斯(J.M.Burgers)提出应用______来定义位错。
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【简答题】The equivalent circuit of induction motor is shown as following figure. A 400V, 60Hz, six-pole, 25hp, Y-connected induction motor has the following impedances in ohms per phase referred to the stator ...
【简答题】The equivalent circuit of induction motor is shown as following figure. A 460V, 60Hz, six-pole, 25hp, Y-connected induction motor has the following impedances in ohms per phase referred to the stator ...
【简答题】The equivalent circuit of induction motor is shown as following figure. A 350V, 60Hz, six-pole, 25hp, Y-connected induction motor has the following impedances in ohms per phase referred to the stator ...
【简答题】The input signal x [ n ]= cos ( w 0 n ) contains only with the frequency w 0 , while the output y [ n ]= x 2 [ n ] contains frequency
【简答题】The equivalent circuit of induction motor is shown as following figure. A 350V, 60Hz, four-pole, 25hp, Y-connected induction motor has the following impedances in ohms per phase referred to the stator...
【单选题】An analog signal m(t) with zero mean is a stationary process. Its frequency range is 0(Hz) ~ 8000(Hz) and its amplitude is uniformly distributed between -5(V) ~ +5(V). Then, the minimum Nyquist sampli...
A.
f=8000, P=25, R=8
B.
f=16000, P=25/2, R=7
C.
f=8000, P=25/3, R=9
D.
f=16000, P=25/3, R=8
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