Comparison


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comparison

[kəm′par·ə·sən]
(computer science)
A computer operation in which two numbers are compared as to identity, relative magnitude, or sign.

Comparison

 

comparing a gauge or quantity to be measured with a quantity that is reproducible in the measuring process.

Comparisons are made by instruments such as the equal-arm balance, the electric potentiometer, the photometer bench with a photometer, and the comparator for linear standards.


Comparison

 

an act of thought by means of which the content of being and cognition is classified, ordered, and evaluated; in comparison, the world is understood to be “coherent” diversity. The act of comparison consists of the pairing of objects for the purpose of clarifying their relationship. Essential to this are the conditions, or bases, of comparison—the attributes that determine precisely what the possible relationships are between objects.

Comparison has meaning only in an aggregate of “homogeneous” objects that form a class. The comparability of objects in a class (tertium comparationis) is realized in terms of the attributes essential for a particular examination; objects comparable in terms of one basis may be incomparable in terms of another. For example, all people are comparable in terms of age, but not all are comparable with respect to “being older.”

The simplest and most important type of relationships revealed by means of comparison are the relationships of identity (equality) and difference. Comparison of this type leads in turn to the concept of universal comparability, that is, the notion that it is always possible to answer the question of whether objects are identical or different. Objects of visual experience are always comparable, although the condition of visibility, or observability, is a significant restriction. In theory, the visual comparison of objects is often impossible, and to compare objects it is necessary to resort to inferences and, eventually, to certain abstractions from which the inferences have been deduced. The supposition of universal comparability is therefore sometimes called the abstraction of comparability. As a rule, the abstraction of comparability is a nontrivial hypothesis and is valid within the framework and on the basis of the main principles of theory.

M. M. NOVOSELOV [24–1047–1; updated]

References in periodicals archive ?
Comparison has many advantages in our day-to-day activities, we compare prices, quality and other choices to choose the products we buy.
On his appointment, Mr Wilson said: "This role is a really exciting challenge for me - Comparison Creator has developed a great offering that is used by some of the leading businesses in the price comparison sector.
The completion of the transaction secures funding for the Comparison Group to roll out a series of currency comparison sites to the lucrative UK and European markets, with an expansion into utilities and financial services planned for 2020.
Thus, it appears that users view SNSs as idealized places to facilitate negative social comparison [19].
Upward comparison occurs when we compare ourselves with someone who we perceive as "better-off" than ourselves, and downward comparison occurs when we compare with someone we feel is "worse-off" than ourselves.
With the success of the power and broadband comparison service, founders Speight and Tyu'kov predict more utilities comparison services to come.
As a white-label provider, Decision Tech sits behind several of the UK's leading comparison tools for home communications, including Moneysavingexpert.com.
Layoffs also mean permanent increases in average wages per quarter for employers with layoffs relative to comparison employers, suggesting that lower paid employees are the most likely to be laid off.
CEO of Protect Your Bricks and Comparison Creator, Steve Jones, said, 'The launch of Protect Your Bricks marks another first for Comparison Creator.
The often-used techniques are the eigenvector, geometric mean, and logarithm least square methods, all of which basically derive a crisp weight vector from a crisp comparison matrix.
Scholars of religion examine the status of comparative methods in contemporary religious studies and theology from the perspectives of comparison: contestation and defence, phenomenology and the foundations of comparison, and reciprocal illumination and comparative theology.
When people seek out external referents to evaluate their opinions or abilities because they feel that object information or standards are insufficient to reduce self-uncertainty, this is referred to as social comparison (Festinger, 1954).

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