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Population inversion
| Glossary Of Laser Terminology |
- A state in which a substance has been energized, or excited, so that more atoms or molecules are in a higher excited state than in a lower resting state. this is a necessary prerequisite for laser action.
- A state of a medium where a higher-lying electronic level has a higher population than a lower-lying level
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Inverse, английский
- Обратный, противоположный; перевернутый
- A перевёрнутый, инверс(ив)ный translation
Inverse burn rate, английский
Обратная скорость горения пиротехнической задержки в мс дюйм
Inverse care law, английский
The idea that the people who most need care and services are least likely or able to access them
Inverse characteristic relay, английский
Inverse condemnation, английский
A legal doctrine holding that, in certain circumstances, where private property is destroyed or substantially diminished in value by government action, the conduct of the government is regarded as the taking of the property and the owner of the property must be compensated in fair value by the government. inverse-square law a law which applies to a light source (or to a sound source) that is in a space far away from any reflecting surface: the intensity at a point, as measured on a surface which is perpendicular to a line drawn between the point and the source, varies inversely with the square of the distance between the point and the source. (for sound waves, this decrease in intensity is equivalent to a drop in sound-pressure level of 6 db for each doubling of distance from the source.) inverse-square law 545 intersecting arcade inverse-square law interrupted arch molding
Inverse conductivity, английский
Обратная удельная проводимость
Inverse conversion, английский
Обратное преобразование
Inverse convolution, английский
Обратная свертка
Inverse correlation, английский
Отрицательная корреляция
Inverse deconvolution, английский
Обратная деконволюция
Inverse definite minimum time over current relay, английский
Inverse diffraction, английский
Обратная дифракция
Inverse discrete cosine transform, английский
Inverse discrete fourier transform, английский
Inverse distance squared, английский
Inverse dynamical problem, английский
Обратная задача динамики
Inverse fast fourier transform, английский
Inverse fast fourier transform (ifft), английский
Inverse filtering, английский
Деконволюция
Inverse floater, английский
Inverse floater (ценная бумага с инвертированной плавающей ставкой), русский
Ценная бумага, по которой выплачивается плавающая процентная ставка, флюктуирующая в направлении обратном к изменениям значения индекса, к которому ставка привязана.
Prerequisite, английский
Electronic, английский
- Associates, incorporated фирма «электроник ассо- шиитс инкорпорейтед»
- Communications, incorporated фирма «электронике комьюникейшнз инкорпорейтед»
- Devices, incorporated фирма «электроник дивайсиз :ин- корпорейтед»
- Электронный
- [emergency] locator transmitter аварийный радиомаяк
- One of the music genres that appears under genre classification in windows media player library. based on id3 standard tagging format for mp3 audio files. id3v1 genre id # 52.
Population, английский
- A definable set of individual units to which the findings from statistical examination of a sample subset are intended to be applied. the population will generally much outnumber the sample. in re-randomisation statistics the process of applying inference
- See stock.
- A collection of units being studied. units can be people, places, objects, epochs, drugs, procedures, or many other things. much of statistics is concerned with estimating numerical properties (parameters) of an entire population from a random sample of units from the population.
- A group or number of people living within a specified area or sharing similar characteristics (such as occupation or age).
- Население; народонаселение; генеральная совокупность (в выборочном наблюдении); популяция (биол)
- Население
- 1. the number of people living in a country or town population statistics show that the birth rate is slowing down. the government has decided to screen the whole population of the area. 2. the number of patients in hospital the hospital population in the area has fallen below 10,000.
- Популяция
- Население; популяция -
- Популяция. в клинических исследованиях совокупность субъектов, обладающих какими-либо одинаковыми признаками (пол, возраст, диагноз).
- Население; популяция
- Any group of individuals, usually of a single species, occupying a given area at the same time; groups of organisms with homologue (same) alleles. p. cycle: changes in the numbers of individuals in a population which repeatedly oscillate between periods of high and low density. p. density: allowing a mathematically precise reflection - pd. • absolute: pd = number of individuals/unit area or volume [1/m2] or [1/m3] • relative: pd allows only a simple comparison (pd <, =, >, ? etc.). p. dynamics: the variations in time and space in the sizes and densities of populations; distribution due to changing food resources - the stability of a population depends upon abiotic factors, intraspecific competition (density dependent), natality, mortality etc. p. ecology: the study of the variations in time and space in the sizes and densities of populations, and of the factors causing those variations. p. fluctuation: variations over time in the size of a population. p. growth: is zero, when the birth rate equals the death rate (see carrying capacity). nt+1 = nt + r nt, current number of individuals r = (natality + immigration) - (mortality+emigration) r, intrinsic rate of growth (see density) p. pyramid: a means of illustrating the age structure of a population diagrammatically, by placing the youngest age class at the base and stacking successive age classes above it. p. regulation : a tendency in a population for some factor to cause density to increase when it is low and to decrease nt, momentary number of individuals when it is high. n0, number of individuals at start
- Generally, a collection of individuals with common characteristics. in statistics, a potentially infinite collection of independent (->independence) units that include all units of a specified type with attention paid only to the agggregate (->aggregation) property of the collection. a sample of data drawn from this population is a subset of the units constituting this population and scientific generalizations from such samples are limited by the size of the population originally specified (->model, ->representation).
- The process of scanning content to compile and maintain an index.
- Fish of the same species inhabiting a specified geographic area.
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Z-cavity, английский
A term referring to the shape of the optical layout of the tubes and resonator inside a laser.
Laser rod, английский
A solid-state, rod-shaped lasing medium in which ion excitation is caused by a source of intense light (optical pumping) such as a flashlamp. various materials are used for the rod, the earliest of which was synthetic ruby crystal.
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