نتایج جستجو برای: drift ratio
تعداد نتایج: 532180 فیلتر نتایج به سال:
The energy spectra of cosmic-ray low-energy antiprotons ( *p's) and protons ( p's) have been measured by BESS in 1999 and 2000, during a period covering reversal at the solar magnetic field. Based on these measurements, a sudden increase of the *p/p flux ratio following the solar magnetic field reversal was observed, and it generally agrees with a drift model of the solar modulation.
The preamplifier is a critical component of gyrometer’s electronics. Indeed the resolution of the sensor is limited by its signal to noise ratio, and the gyrometer’s thermal stability is limited by its gain drift. In this paper, five different kinds of preamplifiers are presented and compared. Finally, the design of an integrated preamplifier is shown in order to increase the gain stability whi...
Recently, the combined problem of online class imbalance and concept drift (OCI-CD) has received much interest. The effect this on state-of-the-art adaptive non-adaptive learners is not widely investigated. This work explores impact parameters such as current ratio, length stream, type drift, levels state (static or dynamic) learners. experimental results demonstrate that each parameter conside...
When studying underwater acoustic exploration, tracking and positioning, the target signals collected by hydrophones are often submerged in strong intermittent noise environmental noise. In this paper, an algorithm that combines empirical mode decomposition wavelet transform is proposed to achieve efficient extraction of environment with First calibration baseline drift performed on algorithm, ...
The force sensor is key to the performance of atomic force microscopy (AFM). Nowadays, most atomic force microscopes use micromachined force sensors made from silicon, but piezoelectric quartz sensors are being applied at an increasing rate, mainly in vacuum. These self-sensing force sensors allow a relatively easy upgrade of a scanning tunneling microscope to a combined scanning tunneling/atom...
We present a novel method for determining the surface density of protoplanetary disks through consideration of disk ‘dust lines’ which indicate the observed disk radial scale at different observational wavelengths. This method relies on the assumption that the processes of particle growth and drift control the radial scale of the disk at late stages of disk evolution such that the lifetime of t...
Ambient ionization methods, such as laser ablation electrospray ionization (LAESI), facilitate the direct analysis of unperturbed cells and tissues in their native states. However, the lack of a separation step in these ionization techniques results in limited molecular coverage due to interferences, ion suppression effects, and the lack of ability to differentiate between structural isomers an...
Laboratory studies of drift waves: Non-linear mode interaction and structure formation in turbulence
Coherent drift modes and drift wave turbulence is studied in a collisionality dominated high-density helicon plasma. The drift wave instability is identified by comparison of the drift mode density fluctuations characteristics with a linear dispersion relation, which reproduces the experimentally observed bent eigenmode structures due to radial gradients of the collisionality profile. Special a...
Needham (1928) first noted the ‘drift’ of aquatic insects when examining the importance of terrestrial insects as trout food. When using a fine copper wire-meshed net to collect benthos in streams near Ithaca, NY he discovered large numbers of aquatic insects present his samples. Drift attracted more attention from researchers in the 1950’s after Muller quantified drift and compared drift with ...
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