background signal การใช้

• In physics and telecommunication, background signal noise can be detrimental or in some cases beneficial.
• However, occasionally extremely large lightning flashes occur which produce distinctive signatures that stand out from the background signals.
• The background signal in an XRF spectrum derives primarily from scattering of primary beam photons by the sample surface.
• The most common use of this technique is for suppression of background signal in time of flight MR angiography.
• Surveyor nuclease also has a 52 exonuclease activity that attacks the ends of double stranded DNA increasing background signal during extended incubation.
• The poor kinetics require that high concentrations of the phosphine be used which leads to problems with high background signal in imaging applications.
• The devices to transmit and receive, and the opacity of substances to the waves, and background signals are different, but that's about all.
• The IR signal from the source is usually chopped or modulated so that thermal background signals can be offset from the desired signal.
• During visualisation, one determines the fluorescence intensities of the BiFC complex and the internal control which, after subtracting background signal, becomes a ratio.
• Thus OCT can build up clear 3D images of thick samples by rejecting background signal while collecting light directly reflected from surfaces of interest.
• Each individual organism generates a particular electrical signal; these individual signals cause massed groups of plankton to emit what amounts to a noisy background signal.
• In contrast to a crystalline pattern consisting of a series of sharp peaks, amorphous materials ( liquids, glasses etc . ) produce a broad background signal.
• Without sufficient levels of GABA to drown out all of the background signals, said Leventhal, " then all of your higher brain functions go bad ."
• One main challenge in apertureless NSOM / FTIR is a strong background signal because the scattering is obtained from both near-field and remote area of the probe.
• Despite an enormous amount of background signals picked up by the new detectors, the research team found twelve events which had not coincided with any solar flares or supernovas.
• As the ionisation signal is often significantly smaller than the background signal, it is normally necessary to obtain more than one image at varying energies to remove the background effect.
• Because the various elements have different core level energies, NEXAFS permits extraction of the signal from a surface monolayer or even a single buried layer in the presence of a huge background signal.
• The mode of operation to be preferred depends on the particular application of the technique and on the prevailing experimental conditions, mainly the type of noise or background signal that limits the detectability.
• Even when these combined systems are employed, shots fired from far enough away will not be detected because the amount of gunshot signal ( both acoustic and Infrared ) eventually fades into the background signals.