An optimization procedure for the location of the relay transceiver in ultrawideband wireless communication system is presented. The impulse responses of different transceiver locations are computed by shooting and bouncing ray/image (SBR/Image) techniques and inverse fast Fourier transform (IFFT). By using the impulse responses of these multi-path channels, the bit error rate (BER) performance...

The commercial engines retrieved the appropriate documents by user’s keyword. Therefore, they reduce user’s effort and time to find appropriate information. However, the web page list retrieved from the engines is still not enough for user effort free. It is because the search target for each user is usually different according to user profile. Thus, it is need to reorder web page list accordin...

The interest in refractory materials is increasing rapidly recent decades due to the development of hypersonic vehicles. However, substance that has highest melting point (Tm) keeps a secret, since precise measurements extreme conditions are overwhelmingly difficult. In present work, an accurate deep potential (DP) model Hf–Ta–C–N system was first trained, and then applied sea...