ترجمة وتحليل الكلمات عن طريق الذكاء الاصطناعي ChatGPT
في هذه الصفحة يمكنك الحصول على تحليل مفصل لكلمة أو عبارة باستخدام أفضل تقنيات الذكاء الاصطناعي المتوفرة اليوم:
- كيف يتم استخدام الكلمة في اللغة
- تردد الكلمة
- ما إذا كانت الكلمة تستخدم في كثير من الأحيان في اللغة المنطوقة أو المكتوبة
- خيارات الترجمة إلى الروسية أو الإسبانية، على التوالي
- أمثلة على استخدام الكلمة (عدة عبارات مع الترجمة)
- أصل الكلمة
%ما هو (من)٪ 1 - تعريف
![[[Video feedback]].](https://commons.wikimedia.org/wiki/Special:FilePath/Adam Savage HOPE.jpg?width=200 "[[Video feedback]].")
![UK Northern Rock 2007 bank run]].](https://commons.wikimedia.org/wiki/Special:FilePath/Birmingham Northern Rock bank run 2007.jpg?width=200 "UK Northern Rock 2007 bank run]].")
![Earth's energy balance]]. Human-caused increases in greenhouse gases form a positive feedback cycle involving the [[greenhouse effect]].](https://commons.wikimedia.org/wiki/Special:FilePath/Greenhouse Effect.svg?width=200 "Earth's energy balance]]. Human-caused increases in greenhouse gases form a positive feedback cycle involving the [[greenhouse effect]].")
![causal]] functions.](https://commons.wikimedia.org/wiki/Special:FilePath/Ideal feedback model.svg?width=200 "causal]] functions.")
![In a [[Schmitt trigger]] circuit, feedback to the non-inverting input of an amplifier pushes the output directly away from the applied voltage towards the maximum or minimum voltage the amplifier can generate.](https://commons.wikimedia.org/wiki/Special:FilePath/Op-Amp Schmitt Trigger.svg?width=200 "In a [[Schmitt trigger]] circuit, feedback to the non-inverting input of an amplifier pushes the output directly away from the applied voltage towards the maximum or minimum voltage the amplifier can generate.")
![During the Phanerozoic the [[biodiversity]] shows a steady but not monotonic increase from near zero to several thousands of genera.](https://commons.wikimedia.org/wiki/Special:FilePath/Phanerozoic Biodiversity.svg?width=200 "During the Phanerozoic the [[biodiversity]] shows a steady but not monotonic increase from near zero to several thousands of genera.")
![Positive feedback is the amplification of a body's response to a stimulus. For example, in childbirth, when the head of the fetus pushes up against the cervix (1) it stimulates a nerve impulse from the cervix to the brain (2). When the brain is notified, it signals the pituitary gland to release a hormone called [[oxytocin]](3). Oxytocin is then carried via the bloodstream to the [[uterus]] (4) causing contractions, pushing the fetus towards the cervix eventually inducing childbirth.](https://commons.wikimedia.org/wiki/Special:FilePath/Positive Feedback- Childbirth (1).svg?width=200 "Positive feedback is the amplification of a body's response to a stimulus. For example, in childbirth, when the head of the fetus pushes up against the cervix (1) it stimulates a nerve impulse from the cervix to the brain (2). When the brain is notified, it signals the pituitary gland to release a hormone called [[oxytocin]](3). Oxytocin is then carried via the bloodstream to the [[uterus]] (4) causing contractions, pushing the fetus towards the cervix eventually inducing childbirth.")
![[[Platelet]] clotting demonstrates positive feedback. The damaged blood vessel wall releases chemicals that initiate the formation of a blood clot through platelet congregation. As more platelets gather, more chemicals are released that speed up the process. The process gets faster and faster until the blood vessel wall is completely sealed and the positive feedback loop has ended. The exponential form of the graph illustrates the positive feedback mechanism.](https://commons.wikimedia.org/wiki/Special:FilePath/Positive Feedback Diagram (2).svg?width=200 "[[Platelet]] clotting demonstrates positive feedback. The damaged blood vessel wall releases chemicals that initiate the formation of a blood clot through platelet congregation. As more platelets gather, more chemicals are released that speed up the process. The process gets faster and faster until the blood vessel wall is completely sealed and the positive feedback loop has ended. The exponential form of the graph illustrates the positive feedback mechanism.")
![Positive feedback is a mechanism by which an output is enhanced, such as protein levels. However, in order to avoid any fluctuation in the protein level, the mechanism is inhibited stochastically (I), therefore when the concentration of the activated protein (A) is past the threshold ([I]), the loop mechanism is activated and the concentration of A increases exponentially if d[A]=k [A](https://commons.wikimedia.org/wiki/Special:FilePath/Positive feedback bistable switch.svg?width=200 "Positive feedback is a mechanism by which an output is enhanced, such as protein levels. However, in order to avoid any fluctuation in the protein level, the mechanism is inhibited stochastically (I), therefore when the concentration of the activated protein (A) is past the threshold ([I]), the loop mechanism is activated and the concentration of A increases exponentially if d[A]=k [A")
![nor]] gates with positive feedback. Red and black mean logical '1' and '0', respectively.](https://commons.wikimedia.org/wiki/Special:FilePath/R-S mk2.gif?width=200 "nor]] gates with positive feedback. Red and black mean logical '1' and '0', respectively.")
![A vintage style regenerative radio receiver. Due to the controlled use of positive feedback, sufficient amplification can be derived from a single [[vacuum tube]] or valve (centre).](https://commons.wikimedia.org/wiki/Special:FilePath/Regenerartive Receiver-S7300056.JPG?width=200 "A vintage style regenerative radio receiver. Due to the controlled use of positive feedback, sufficient amplification can be derived from a single [[vacuum tube]] or valve (centre).")
ويكيبيديا
Positive feedback (exacerbating feedback, self-reinforcing feedback) is a process that occurs in a feedback loop which exacerbates the effects of a small disturbance. That is, the effects of a perturbation on a system include an increase in the magnitude of the perturbation. That is, A produces more of B which in turn produces more of A. In contrast, a system in which the results of a change act to reduce or counteract it has negative feedback. Both concepts play an important role in science and engineering, including biology, chemistry, and cybernetics.
Mathematically, positive feedback is defined as a positive loop gain around a closed loop of cause and effect. That is, positive feedback is in phase with the input, in the sense that it adds to make the input larger. Positive feedback tends to cause system instability. When the loop gain is positive and above 1, there will typically be exponential growth, increasing oscillations, chaotic behavior or other divergences from equilibrium. System parameters will typically accelerate towards extreme values, which may damage or destroy the system, or may end with the system latched into a new stable state. Positive feedback may be controlled by signals in the system being filtered, damped, or limited, or it can be cancelled or reduced by adding negative feedback.
Positive feedback is used in digital electronics to force voltages away from intermediate voltages into '0' and '1' states. On the other hand, thermal runaway is a type of positive feedback that can destroy semiconductor junctions. Positive feedback in chemical reactions can increase the rate of reactions, and in some cases can lead to explosions. Positive feedback in mechanical design causes tipping-point, or 'over-centre', mechanisms to snap into position, for example in switches and locking pliers. Out of control, it can cause bridges to collapse. Positive feedback in economic systems can cause boom-then-bust cycles. A familiar example of positive feedback is the loud squealing or howling sound produced by audio feedback in public address systems: the microphone picks up sound from its own loudspeakers, amplifies it, and sends it through the speakers again.
