Abstract Because the traditional pulse laser high-precision ranging method has problems of low accuracy and long time, a algorithm under signal-to-noise ratio is proposed. Based on analysis basic principle ranging, signal obtained by modeling echo analog waveform. The wavelet denoising improved threshold function used to denoise ratio. According processing results, carried out through sinusoida...

1. Non-invasive recording techniques of the arterial pressure pulse will distort the arterial wall and may alter pulse wave measurements. We hypothesized that intersubject variability of these measurements would be reduced if recording forces were normalized to reflect individualized arterial occlusion forces. 2. In 10 normal male subjects (age 24 +/- 1 years), brachial, radial and finger arter...

The flows induced by different modes of plasma discharge over a 20 conical forefody are studied with a two-dimensional particle image velocimetry in a still air chamber with one atmosphere pressure. The effects of pulse duty ratio on the induced maximum crossflow velocity and maximum axial vorticity are compared with those of steady discharge. Effects of pulse frequency and ac voltage are discu...

We demonstrate efficient spectral compression of picosecond pulses in an all-fiber configuration at telecommunication wavelengths. Thanks to parabolic pulse shaping, a spectral compression by a factor 12 is achieved with an enhanced Strehl ratio. OCIS codes: 190.4370 (nonlinear optics, fibers), 320.5540 (pulse shaping), 070.4340 (optical signal processing)

OBJECTIVE Patients that initially appear stable on arrival to the hospital often have less intensive monitoring of their vital signs, possibly leading to excess mortality. The aim was to describe risk factors for deterioration in vital signs and the related prognosis among patients with normal vital signs at arrival to a medical emergency department (MED). DESIGN AND SETTING Single-centre, re...