in many signal processing applications, an appropriate measure to comparetwo signals plays a fundamental role in both implementing the algorithm andevaluating its performance. several techniques have been introduced in literature assimilarity measures. however, the existing measures are often either impractical forsome applications or they have unsatisfactory results in some other applications....

The electroretinogram (ERG), especially the b/a wave ratio, is considered a good indicator of retinal ischaemia in central retinal vein obstruction (CRVO). Seven CRVO patients who showed b/a wave ratio improvement from < 1.0 [negative type (-) ERG] to > or = 1.0 and one from 1.07 to 1.53 were studied. Three mechanisms of change were observed: firstly, the b-wave amplitude increased without an a...

The actions of phencyclidine [1-(1-phenylcyclohexyl)piperidine, PCP] and its morpholine analog [1-(1-phenylcyclohexyl)morpholine, PCM] on ionic currents of nicotinic acetylcholine receptors were studied at the neuromuscular junction of frog skeletal muscle and on embryonic rat muscle cells in tissue culture. PCP and PCM reduced the peak amplitude and the decay time constant of the endplate curr...

Several properties of OFDM has made it an essential modulation scheme for high speed transmission links. But one major drawback ofOFDM is its large Peak-toaverage power ratio. Here we have reviewed some of the PAPR reduction techniques and compared the performance of clipping and filtering,partial transmit sequence and selected mapping methods for QAM modulated OFDM. We have also shown analytic...

Current research shows that the wavy shape can play an important role in drag reduction. Meanwhile, it also has potential of noise In present study, a kind periodic cosine profile with large spanwise wavelength and aspect ratio was applied to circular cylinder model. The experiments on influence various ratios (ratio wave amplitude) far-field were carried out 0.55 m × 0.4 aeroacoustic wind tunn...

Pulse compression is used to achieve large radiated energy but simultaneously a short pulse for range resolution. Range resolution is an ability of the receiver to detect nearby targets. Pulse compression can also detect small target signals out of clutter. The matched filter output consists of unwanted but unavoidable side lobes however the reduction of this side lobe strength is the active re...