Sentence examples for power item from inspiring English sources

Spectrum of the first power to the fifth power item is shown in Fig. 3.

Fig. 3 Spectrum of the first power to the fifth power item.

In theory, the bandwidth generated by nth power item is n times of the width for the baseband.

From this, the spectrum of the nth power item can be deduced: {X}^{otimes n}(f)={displaystyle sum_{m=0}^n{C}_n^m{X}_b^{otimes n}left[f+left n-2mright)Fright]}.

So the fundamental frequency band is contaminated by odd power items, and thereamong the frequency component produced around the fundamental frequency F by the 2k − 1 -th power item is {X}_c^k(f)={C}_{2k-1}^k{X}_b^{otimes 2k-1}left(f-Fright). (29).

The harmonic frequency bands are shifted copy of the spectrum from respective power item of baseband signal according to the integer multiple of the carrier frequency, rather than the simple duplicated and shifted copy of the signal spectrum of the baseband signal.

Eyeglasses, which sharpened vision, became power items.

Thus, it can be seen that the modulated signal has been contaminated around the carrier frequency by the third and larger odd power items.

From Eq. (28) and Fig. 3, it is not difficult to find out that even power items produce even order harmonic frequency band up to the specific even order, and odd power items produce odd order harmonic frequency band up to the specific odd order.

The spectrum attenuated at the band edge, so magnitude 0.1 is taken to calculate the bandwidth ratio of the first 10 power items to the baseband signal, the result is indicated in Table 1.

If a nonlinear section has the odd symmetry property, namely f(−x) = − f(x), then all the even power items at the right side of equation (9) will disappear.