perturbation – מילון אנגלי-אנגלי
perturbation
n.
worry, concern, alarm; agitation, disturbance, agitation; bewilderment, act of perplexing
Perturbation
Perturbation or
perturb may refer to:
- Perturbation theory, mathematical methods that give approximate solutions to problems that cannot be solved exactly
- Perturbation (geology), changes in the nature of alluvial deposits over time
- Perturbation (astronomy), alterations to an object's orbit—e.g., caused by gravitational interactions with other bodies
- Perturbation theory (quantum mechanics), a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one
- Perturbation (biology), an alteration of the function of a biological system, induced by external or internal mechanisms
- Perturbation (transport), operation of a transport system outside of timetable such that delays in arrival and departure from defined locations are present.
- Perturbation function, mathematical function which relates the primal and dual problems.
perturbation
Noun
1. an unhappy and worried mental state; "there was too much anger and disturbance"; "she didn't realize the upset she caused me"
(synonym) disturbance, upset
(hypernym) agitation
(derivation) perturb, unhinge, disquiet, trouble, cark, distract, disorder
2. (physics) a secondary influence on a system that causes it to deviate slightly
(hypernym) influence
(hyponym) variation
(derivation) perturb
(classification) physics, physical science, natural philosophy
3. activity that is an intrusion or interruption; "he looked around for the source of the disturbance"; "there was a disturbance of neural function"
(synonym) disturbance
(hypernym) activity
(hyponym) fuss, trouble, bother, hassle
4. a disposition that is confused or nervous and upset
(synonym) fluster
(hypernym) discomposure
(derivation) perturb, unhinge, disquiet, trouble, cark, distract, disorder
5. the act of causing disorder
(synonym) disruption
(hypernym) disturbance
(hyponym) dislocation, breakdown
(derivation) perturb
perturbation
nf.
disruption, disturbance, perturbation, upheaval, distemper, interference
Perturbation
(n.)
The act of perturbing, or the state of being perturbed; esp., agitation of mind.
(n.)
A disturbance in the regular elliptic or other motion of a heavenly body, produced by some force additional to that which causes its regular motion; as, the perturbations of the planets are caused by their attraction on each other.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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