(10.40)Noise factor=Signal to noise ratio at inputSignal to noise ratio at output As the units on the top and bottom of this equation are the same then it will be seen that the noise factor is just a number. It is convenient to work in decibels and to th...
showing the overlapping square unit cells of the top and bottom phononic crystal mirrors and the density-modulated membrane.c, Setup schematic.d, Mechanical ringdown measurement of the quality factor of the soft-clamped mode of the pillar membrane. The ringdown was...
where w(i,j) serves as the weighting factor, which satisfies (12){0≤w(i,j)≤1,∀j∈I∑j∈Iw(i,j)=1. The similarity in the pixel pair (i,j) is measured by the gray-level vectors of their blocks. With this weighting strategy, non-local means not only considers the single-pi...
The measurements were taken mainly inside hospitals, prioritizing more sensitive departments such as intensive care units. There is a potential for growth in work carried out in this area, but research should also include discussions about guidelines for improvement measures aimed at reducing noise in...
Noise control in the heating, ventilation and air-conditioning (HVAC) systems is one of the critical design parameters in measuring the occupant comfort. The noise generated by air-handling units propagates through the ducts in the axial as well as transverse direction. Noise radiated in the tran...
Flow regulation by dams is a major factor affecting river connectivity globally19. In the U.S. alone, dams affect nearly 1 million km of rivers41, disrupting many physical and ecological processes26,42,43. Dams tend to stabilize flow variability by muting high flows, increasing base flows, an...
From our experience, for lowest-cost sensors, increasing the noise model parameters by a factor of 10x or more may be necessary. If you use Kalibr with such a device, please give us feedback, such that we can develop specific guidelines, device-specific parameter suggestions, or more advanced...
While the quantity F in equation (1-3) is often called noise figure, more often it is called noise factor or sometimes noise figure in linear terms. Modern usage of noise figure usually is reserved for the quantity NF, expressed in dB units: This is the convention used in the remainder ...
A possible limiting factor for the cancellation performance is found to be the presence of higher order modes of drag noise. 2006 Acoustical Society of America. 展开 关键词: Article DOI: 10.1121/1.2204443 被引量: 48 年份: 2006 收藏 引用 批量引用 报错 分享 ...
One limiting factor in improving quality of the measurements by averaging is the time needed to repeat the measurements. Naturally, 100 measurements will take 100 folds longer time then a single measurement. The second limit comes from the systematic errors, e. g. linearity of the photomultiplier...