Abstract Photoacoustic Doppler flow measurement based on continuous wave laser excitation owns the merit of clearly presenting power spectra. Extending this technique to dual wavelengths can gain spectral information sample extra speed information. An experimental system with two diodes respectively operated at 405 nm and 660 is built black red dyed polystyrene beads performed. The measured spe...

The birth of gravitational wave astronomy was triggered by the first detection a signal produced merger two compact objects (also known as binary coalescence event). following detections made Earth-based network advanced interferometers had significant impact in many fields science: astrophysics, cosmology, nuclear physics and fundamental physics. However, signals are not only type waves potent...

The direct detection of continuous gravitational waves from pulsars is a much anticipated discovery in the emerging field multi-messenger wave (GW) astronomy. Because putative pulsar signals are exceedingly weak large amounts data need to be integrated achieve desired sensitivity. Contemporary searches use ingenious ad-hoc methods reduce computational complexity. In this paper we provide analyt...