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...

Frequency is the number of occurrences of a repeating event per unit of time. Frequency is an important parameter used in science and engineering to specify...

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...

< 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...

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

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...

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

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

A frequency-dependent negative resistor (FDNR) is a circuit element that exhibits a purely real negative resistance −1/(ω2kC) that decreases in magnitude...

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

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...

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...

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

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...

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...

{\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...

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

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...

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

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)...

Negative-index metamaterial or negative-index material (NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value...

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

contain negative frequencies even if k > 0. Creation operators correspond to positive frequencies, while annihilation operators correspond to negative frequencies...

response at negative frequencies. Fortunately, in most physical systems, the positive frequency-response determines the negative-frequency response because...