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Relative market share indexes a firm's or a brand’s market share against that of its leading competitor. Market concentration , a related metric, measures the degree to which a comparatively small number of firms accounts for a large proportion of the market.
The doubling time is the time it takes for a population to double in size/value. It is applied to population growth, inflation, resource extraction, consumption of goods, compound interest, the volume of malignant tumours, and many other things that tend to grow over time.
The proper notations for sound pressure level using this reference are L p/(20 μPa) or L p (re 20 μPa), but the suffix notations dB SPL, dB(SPL), dBSPL, or dB SPL are very common, even if they are not accepted by the SI. [8] Most sound-level measurements will be made relative to this reference, meaning 1 Pa will equal an SPL of 94 dB.
A percentage change is a way to express a change in a variable. It represents the relative change between the old value and the new one. [6]For example, if a house is worth $100,000 today and the year after its value goes up to $110,000, the percentage change of its value can be expressed as = = %.
The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
While SNR is commonly quoted for electrical signals, it can be applied to any form of signal, for example isotope levels in an ice core, biochemical signaling between cells, or financial trading signals. The term is sometimes used metaphorically to refer to the ratio of useful information to false or irrelevant data in a conversation or exchange.
This complex exponential function is sometimes denoted cis x ("cosine plus i sine"). The formula is still valid if x is a complex number, and is also called Euler's formula in this more general case. [1] Euler's formula is ubiquitous in mathematics, physics, chemistry, and engineering.
A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.The distance between any point of the circle and the centre is called the radius.
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