In mathematics, the concept of signed frequency (negative and positive frequency) can indicate both the rate and sense of rotation; it can be as simple...

In positive frequency-dependent selection, the fitness of a phenotype or genotype increases as it becomes more common. In negative frequency-dependent selection...

to as temporal frequency for clarity and to distinguish it from spatial frequency. Ordinary frequency is related to angular frequency (symbol ω, with...

and does not mean that the frequency has become negative, since there is no canonical definition of positivity for frequency of a complex wave. It simply...

processing, an analytic signal is a complex-valued function that has no negative frequency components.  The real and imaginary parts of an analytic signal are...

pool at unexpectedly high frequencies. Two major models that control the selection balance of B.burgdorferi is negative frequency-dependent selection and...

both auditory signals and warning coloration. There is a negative correlation between the frequency of mimics and the "survivability" of both species involved...

electronics engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has...

< 0 {\displaystyle (x-y)^{2}<0} . We can define the positive and negative frequency parts of Δ ( x − y ) {\displaystyle \Delta (x-y)} , sometimes called...

instead of complex exponentials and don't require complex numbers or negative frequency, they more closely correspond to Joseph Fourier's original transform...

one-sided function of only positive frequencies or a two-sided function of both positive and negative frequencies but with only half the amplitude. Noise...

The negative mass appears as a result of vibration of a metallic particle with a frequency of ω {\displaystyle \omega } which is close the frequency of...

These are determined by three main types of selection dynamics: negative frequency-dependent selection when a rare allele has a selective advantage;...

and any error is reduced by negative feedback to the input. In audio amplifiers, negative feedback flattens frequency response, reduces distortion,...

The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the...

Constellation diagram Negative frequency Phasor Polar modulation Quadrature amplitude modulation Single-sideband modulation The low-frequency modulating waveforms...

the fitness of a phenotype increases as it becomes more common. In negative frequency-dependent selection the fitness of a phenotype decreases as it becomes...

changed its apparent frequency of rotation. A reversal of direction can be described as a negative frequency. Temporal aliasing frequencies in video and cinematography...

operator with negative frequency lowers the energy of any state by an amount proportional to the frequency, while operators with positive frequency raise the...

is a negative frequency. The next row is negative two cycles of a complex exponential, sampled in eight places, so it has a fractional frequency of −1/4...

Frequency-dependent foraging is defined as the tendency of an individual to selectively forage on a certain species or morph based on its relative frequency...

{\displaystyle E(\mathbf {r} ,t)} can be separated into its positive and negative frequency components E ( r , t ) = E + ( r , t ) + E − ( r , t ) {\displaystyle...

shifting the phase of the negative frequency components of u(t) by +90° (π⁄2 radians) and the phase of the positive frequency components by −90°, and i·H(u)(t)...

Apostatic selection is a form of negative frequency-dependent selection. It describes the survival of individual prey animals that are different (through...

generates spontaneous continuous oscillations at its resonant frequency. The negative-resistance oscillator model is not limited to one-port devices...

oscillators and amplifiers, particularly at microwave frequencies. Most microwave energy is produced with negative differential resistance devices. They can also...

of frequencies with a strong signal at the carrier frequency and with weaker signals at frequencies extending above and below the carrier frequency by...

The negative mass appears as a result of vibration of a metallic particle with a frequency of ω {\displaystyle \omega } which is close the frequency of...

variation in a population, even in the absence of de novo mutation, by negative frequency-dependent selection. One mechanism for this is heterozygote advantage...

diffraction efficiency into m = –1 order is achieved, which has a negative frequency shift. One difference from Bragg diffraction is that the light is...