oscillation$55752$ - перевод на греческий
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oscillation$55752$ - перевод на греческий

Self oscillation; Self-exciting oscillation; Self‑oscillation; Self-oscillator
  • Schematic representation of a self-oscillation as a positive feedback loop.  The oscillator ''V'' produces a feedback signal ''B''.  The controller at ''R'' uses this signal to modulate the external power ''S'' that acts on the oscillator.  If the power is modulated in phase with the oscillator's velocity, a negative damping is established and the oscillation grows until limited by nonlinearities.

oscillation      
n. ταλάντευση, ταλάντωση
sound wave         
  • oscillating]] usually at the same [[frequency]]. One of the forks is being hit with a rubberized mallet. Although only the first tuning fork has been hit, the second fork is visibly excited due to the oscillation caused by the periodic change in the pressure and density of the air by hitting the other fork, creating an [[acoustic resonance]] between the forks. However, if we place a piece of metal on a prong, we see that the effect dampens, and the excitations become less and less pronounced as resonance isn't achieved as effectively.</small>
  • Figure 2. Duration perception
  • date=19 August 2007}}</ref>
  • Figure 3. Loudness perception
  • Figure 1. Pitch perception
  • Sinusoidal waves]] of different frequencies. The bottom waves have higher frequencies than those above. The horizontal axis represents time.
  • Spherical compression (longitudinal) waves
  • A 'pressure over time' graph of a 20 ms recording of a clarinet tone demonstrates the two fundamental elements of sound: Pressure and Time.
  • Figure 4. Timbre perception
  • Approximate frequency ranges corresponding to ultrasound, with rough guide of some applications
VIBRATION THAT PROPAGATES AS AN ACOUSTIC WAVE
Radiation of sound; Sounds; Sound wave; Sound waves; Auditory Range; Auditory range; Airborne sound; Acoustic Radiation; Sound propagation; Acoustic energy; Characteristics of sound; Sonida; Duration of sound; Sound duration
ηχητικό κύμα
brain wave         
  • Tonic]] firing pattern of single neuron showing rhythmic spiking activity
  • 200px
  • Simulation of [[Kuramoto model]] showing neural synchronization and oscillations in the mean field
  •  doi = 10.1007/s004220000160 }}</ref> As the gain A is increased the network starts to oscillate at 3Hz.
  • Hindmarsh–Rose neuron]] showing typical [[bursting]] behavior: a fast rhythm generated by individual spikes and a slower rhythm generated by the bursts.
  • Generalized 3 Hz spike and wave discharges reflecting [[seizure]] activity
  • Handwriting of a person affected by [[Parkinson's disease]] showing rhythmic tremor activity in the strokes
1953 NOVEL BY POUL ANDERSON
Brainwave; Brainwaves; Brain waves; Induced activity; Ongoing brain activity; Neuronal oscillations; Neurodynamics; Neural Field Theory; Neural synchronization; Spontaneous activity; Neuronal synchronization; Neural oscillations; Cortical oscillation; Cortical oscillations; Brain wave; Brain rhythm
έμπνευση

Определение

oscillate
v. n.
1.
Swing, vibrate, sway, move to and fro, move backward and forward.
2.
Vary, fluctuate.

Википедия

Self-oscillation

Self-oscillation is the generation and maintenance of a periodic motion by a source of power that lacks any corresponding periodicity. The oscillator itself controls the phase with which the external power acts on it. Self-oscillators are therefore distinct from forced and parametric resonators, in which the power that sustains the motion must be modulated externally.

In linear systems, self-oscillation appears as an instability associated with a negative damping term, which causes small perturbations to grow exponentially in amplitude. This negative damping is due to a positive feedback between the oscillation and the modulation of the external source of power. The amplitude and waveform of steady self-oscillations are determined by the nonlinear characteristics of the system.

Self-oscillations are important in physics, engineering, biology, and economics.