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In this article a new method based on the function sinn(πt/2Tb) is proposed to obtain 2Tb-long base-band signal which can be applied to quadrature modulation to make the modulated signal constant-enveloped and phase-continuous. The power spectrum of the signal attenuates more quickly and the out-of-band radiation decreases. The general expression of the signal is given and the time-frequency property...
Based on the former work about the variable upper limit integral of Bézier curve, the construction of the set made by all the degree n Bézier curves will be studied. Furthermore, for different degree n, the sets of the corresponding Bézier curves could build a construction like pyramid.
The paper firstly analyzes a four-wing chaotic attractor which is reported recently. Then, a fractional-order chaotic attractor can be obtained based on the four-wing chaotic system. When vary, the dynamics of the fractional-order chaotic attractor are very complex, not only can the four-wing chaotic attractor be observed by numerical simulation, but also some typical periodic attractors can be found...
Pressure distribution detection plays a crucial role in many applications, biomedical, industrial manufacturing and so on. Thus, the film pressure sensor grid had been developed to carry out this task. In the paper, the data acquisition system of this grid has been presented. Moreover, the framework, design and implementation method have also been detailed, which can conveniently obtain the pressure...
Object identification on car seat plays an important role on car safety. In the paper, an object determination method based on rough sets theory is presented. After acquire data from film pressure sensor grid, children or adults can be correctly identified, which has great influence on correct operation of safety airbag and other electronic devices. An case is also presented in the end.
EXB841 gets the shortcomings as lack of gate-voltage, excessiveness of over-current protection threshold and long soft-shutdown time etc. According to the shortages, some improved managements were given. By improving the power supply of the module, adding external gate-voltage molding circuit and changing the external zener, not only the output gate-voltage was boosted, but also the over-current protection...
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