perturbation

(redirected from perturb)
Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.

per·tur·ba·tion

(pĕrtŭr-bāshŭn)
In physical therapy, an external force applied to a person's center of mass in an attempt to move it from the base of support

perturbation

(pĕr″tĕr-bā′shŭn) [L. perturbare, thoroughly disordered]
1. The state of being greatly disturbed or agitated; uneasiness of mind.
2. A disturbance or a change in a structure or function, usually as a result of an external influence.
References in periodicals archive ?
In this paper, Tetra Point Perturb and Observe based MPPT method has been proposed to improve PV system performance in changing irradiance conditions and the effects on characteristic curves of PV array module due to varying irradiance are delineated.
The Perturb and Observe algorithm states that when the operating voltage of the PV panel is perturbed by a small increment, if the resulting change in power P is positive, then we are going in the direction of MPP and we keep on perturbing in the same direction.
In our approach, both the exponential mechanism and Laplace mechanism have been applied, respectively, to select top-k frequent patterns based on the masked weight and to perturb the true support of each pattern.
Pakistani journalist and analyst Najam Sethi in an article published by the News.com on March 3, touched upon Pakistani Prime Minister Nawaz Sahrif's visit to Saudi Arabia and said, "America and Saudi Arabia had decided to perturb Iran in case of failure of these talks [Iran and the Group 5+1 (the US, Russia, China, France and Britain plus Germany)] and use Jundollah (terrorist group) for this purpose."
The departures and biases for the perturbed runs diverge from the control run only for those data types that are sensitive to upper tropospheric humidity.
But You Are the Weather, 1994-95, Clowd and Cloun (Blue) and Clowd and Cloun (Gray) (both 2001), and Doubt by Water, 2003-2004, demonstrated that atmospheric or geographic conditions, in the trace of an exposure or a proximate representation, could infiltrate and perturb the human facies, imbuing it with a dissociated abundance.
These fish were fearless in their journey upstream, and no pesky tourists were going to perturb them.
"We need tools to help us understand how complex exposures perturb complex systems."
When the CN method is used to perturb the database, the best predictor of A, based on A, can be derived as(2)
PEMRA in an official statement released on Wednesday said that the 'appearance of Indian characters on Pakistani TV screens aggravates miseries of Pakistanis who are perturbed over Indian atrocities on Kashmiri brethren.' Given the above, PEMRA banned the broadcast of all advertisements featuring Indian individuals by invoking Section 27(a) of the PEMRA Ordinance 2002.
RAWALPINDI -- The residents of Tench Bhatta, Peoples Colony, Bakra Mandi and adjoining areas are perturbed due to acute water shortage for last several days.
Summary: Hubli (Karnataka) [India], July 28 (ANI): Parliamentary Affairs Minister Pralhad Joshi on Sunday accused opposition MPs, who have written to the Rajya Sabha chairman over "rushing" of bills, of disrupting the House and said that the opposition was "perturbed" with the enhanced productivity of Parliament.