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localized potential

  • 1 локальный потенциал

    1) Mathematics: local potential
    2) Physiology: localized potential

    Универсальный русско-английский словарь > локальный потенциал

  • 2 локальная деполяризация плазмалеммы

    Универсальный русско-английский словарь > локальная деполяризация плазмалеммы

  • 3 локальный ответ

    Универсальный русско-английский словарь > локальный ответ

  • 4 superar

    v.
    1 to beat.
    queremos superar los resultados del año pasado we want to improve on o beat last year's results
    me superó por dos décimas de segundo she beat me by two tenths of a second
    superar algo/a alguien en algo to beat something/somebody for something
    nos superan en número they outnumber us
    me supera en altura/inteligencia he's taller/cleverer than me
    2 to overtake, to pass.
    3 to overcome.
    superar un examen to get through an exam
    tener algo superado to have got over something
    Ellos superan la adversidad They overcome adversity.
    4 to surpass, to exceed, to best, to excel.
    María supera a sus colegas Mary surpasses her colleagues.
    5 to outdo, to win over.
    * * *
    1 (exceder) to surpass, exceed, excel
    2 (obstáculo etc) to overcome, surmount
    1 (sobrepasarse) to excel oneself
    2 (mejorarse) to improve oneself, better oneself
    * * *
    verb
    * * *
    1. VT
    1) (=aventajar) [+ contrincante, adversario] to overcome; [+ límite] to go beyond; [+ récord, marca] to break

    superar a algn en algo: superó al adversario en cuatro puntos — she beat her opponent by four points

    2) (=pasar con éxito) [+ dificultad] to overcome; [+ enfermedad, crisis] to get over
    3) [+ etapa] to get past
    4) [+ prueba, examen] to pass
    2.
    See:
    * * *
    1.
    verbo transitivo
    1)
    a) (ser superior a, mayor que) to exceed, go beyond
    b) ( mejorar) < marca> to beat
    2)
    a) (vencer, sobreponerse a) <timidez/dificultad/etapa> to overcome; < trauma> to get over
    b) (frml) <examen/prueba> to pass
    2.
    superarse v pron to better oneself
    * * *
    = beat, circumvent, go beyond, outperform [out-perform], outweigh, overcome, overtake, score over, outgrow, surpass, survive, go far beyond, extend + far beyond, top, outbalance, outrank, weather, get through, one-up, outwit, outdo, outsmart, ride out, exceed, outfox, go + past, outrun [out-run], best, trump, move on from, go + one better.
    Ex. It would certainly beat the usual file clerk.
    Ex. Plainly, the familiarization stage is circumvented in a computer-based indexing system with machine-assigned terms.
    Ex. Maybe the answer is some kind of localized Ceefax or Oracle information service that could be obtained free through one's television set but went beyond the mainly trivia that these services currently provide.
    Ex. Numerous experiment have tried to determine if free-text searching outperform searching with the aid of a controlled index language.
    Ex. It may be decided that the practical impediments to the distribution and assignment of such numbers outweigh their potential usefulness.
    Ex. Analytical cataloguing seeks to overcome physical packaging.
    Ex. Why have card-based systems been overtaken by computer databases?.
    Ex. A Permuterm index scores over a Double-KWIC index in that it avoids repetitive printing of one title.
    Ex. We outgrow the school, we cannot outgrow the library.
    Ex. The advantages of the system far surpass any disadvantages.
    Ex. The chairwoman of the board had decided that as part of the screening process those who had successfully survived the initial winnowing should furnish the board with tangible evidence of how they might perform on a specific assignment.
    Ex. These changes in the physical form of the catalog have implications which go far beyond changes in form or even in improvements in speed and convenience to the catalog user.
    Ex. We have seen that the relationships of the Publications Office with the institutions and other bodies of the European Communities may in theory, but do not yet in practice extend far beyond those with the six managing institutions.
    Ex. As public library circ declines, spending continues to top inflation.
    Ex. The large profits to be made in this field will outbalance the problems that may lie ahead.
    Ex. One node in the star graphic completely outranks the others, while the other six themselves are interchangeable.
    Ex. The small publishers seem to be weathering the industry changes, and have expectations of growth.
    Ex. I think that the so-called average person often exhibits a great deal of heroism in getting through an ordinary day.
    Ex. This remake of William Castle's action adventure adds a genuinely supernatural plot to the old story of the duplicitous wife scheming to kill her husband but being one-upped by his even more ingenious counterplots.
    Ex. Two dangerous trysts are spied upon by a third and hostile party, whose presence is detected by the lovers who act in consort to outwit him.
    Ex. This novel is narrated by William, an underachiever who is constantly outdone by his charming and lovable identical twin brother.
    Ex. Smart and speedy start-ups blindside mature companies with their inventiveness then grow up into mature companies and are outsmarted in their turn.
    Ex. Without any significant restructuring, the LIS programme in Iran will provide little in the way of riding out the rapid transition that the field is currently experiencing.
    Ex. In the same way, files of item record cards can be difficult to manage if the file size exceeds, say, 2000 cards.
    Ex. It also led to a continuing guerilla war between the authorities and caricaturists who sought to evade, outfox, or entirely defy them.
    Ex. Unfortunately, its conclusions are completely pedestrian, rarely going past the fact that there were old people in England in the late Middle Ages.
    Ex. But he was wiry and wily, too, and he could often out-run, track, back-track, double-back, and finally dodge unseen in the subway.
    Ex. Back in 2001, the tossed salad they prepared fed some 5,000, which then bested the record held by a community in Utah in the United States.
    Ex. If prejudice is allowed to trump the rights that all citizens should enjoy, then everyone's freedoms are ultimately endangered.
    Ex. He is moving on from the past and looking forward to a tremendous future helping to educate parents from his personal experiences.
    Ex. I think Murray will go one better than Wimbledon, but will lose to Federer again in the final.
    ----
    * ayudar a superar = get + Nombre + through.
    * capaz de adaptarse y superar adversidades = resilient.
    * con el propósito de superarse uno mismo = self-improvement-oriented.
    * nada supera a = nothing beats....
    * no superar la prueba de = not stand the test of.
    * ser difícil de superar = take + some beating.
    * sin ser superado = unsurpassed.
    * superar Algo = put + Nombre + behind.
    * superar barreras = hurdle + barriers.
    * superar el intento = resist + effort.
    * superar el miedo = overcome + Posesivo + fear, conquer + fear.
    * superar el nerviosismo = overcome + nervousness.
    * superar el problema de credibilidad = overcome + credibility gap.
    * superar en número = outnumber.
    * superar la barrera del tiempo = cross + time barriers.
    * superar la etapa de = move on from.
    * superar las expectativas = exceed + expectations.
    * superarse a sí mismo = pull + Reflexivo + up(wards) by + Posesivo + (own) bootstraps.
    * superarse a Uno Mismo = make + the best of + Reflexivo.
    * superarse para hacer frente a Algo = rise to + meet.
    * superar una barrera = conquer + barrier.
    * superar una crisis = ford + crisis, survive + crisis.
    * superar una deficiencia = overcome + weakness.
    * superar una dificultad = overcome + difficulty, get over + difficulty.
    * superar una limitación = overcome + limitation, tackle + limitation.
    * superar un análisis minucioso = stand up to + scrutiny, stand up to + examination.
    * superar una situación difícil = weather + the bumpy ride, weather + the storm.
    * superar un examen = pass + examination, pass + an exam.
    * superar un obstáculo = overcome + obstacle, jump over + hurdle, overcome + barrier, conquer + barrier.
    * superar un peligro = overcome + danger.
    * superar un problema = surmount + problem, conquer + problem, get over + problem.
    * verse superado sólo por = be second only to.
    * * *
    1.
    verbo transitivo
    1)
    a) (ser superior a, mayor que) to exceed, go beyond
    b) ( mejorar) < marca> to beat
    2)
    a) (vencer, sobreponerse a) <timidez/dificultad/etapa> to overcome; < trauma> to get over
    b) (frml) <examen/prueba> to pass
    2.
    superarse v pron to better oneself
    * * *
    = beat, circumvent, go beyond, outperform [out-perform], outweigh, overcome, overtake, score over, outgrow, surpass, survive, go far beyond, extend + far beyond, top, outbalance, outrank, weather, get through, one-up, outwit, outdo, outsmart, ride out, exceed, outfox, go + past, outrun [out-run], best, trump, move on from, go + one better.

    Ex: It would certainly beat the usual file clerk.

    Ex: Plainly, the familiarization stage is circumvented in a computer-based indexing system with machine-assigned terms.
    Ex: Maybe the answer is some kind of localized Ceefax or Oracle information service that could be obtained free through one's television set but went beyond the mainly trivia that these services currently provide.
    Ex: Numerous experiment have tried to determine if free-text searching outperform searching with the aid of a controlled index language.
    Ex: It may be decided that the practical impediments to the distribution and assignment of such numbers outweigh their potential usefulness.
    Ex: Analytical cataloguing seeks to overcome physical packaging.
    Ex: Why have card-based systems been overtaken by computer databases?.
    Ex: A Permuterm index scores over a Double-KWIC index in that it avoids repetitive printing of one title.
    Ex: We outgrow the school, we cannot outgrow the library.
    Ex: The advantages of the system far surpass any disadvantages.
    Ex: The chairwoman of the board had decided that as part of the screening process those who had successfully survived the initial winnowing should furnish the board with tangible evidence of how they might perform on a specific assignment.
    Ex: These changes in the physical form of the catalog have implications which go far beyond changes in form or even in improvements in speed and convenience to the catalog user.
    Ex: We have seen that the relationships of the Publications Office with the institutions and other bodies of the European Communities may in theory, but do not yet in practice extend far beyond those with the six managing institutions.
    Ex: As public library circ declines, spending continues to top inflation.
    Ex: The large profits to be made in this field will outbalance the problems that may lie ahead.
    Ex: One node in the star graphic completely outranks the others, while the other six themselves are interchangeable.
    Ex: The small publishers seem to be weathering the industry changes, and have expectations of growth.
    Ex: I think that the so-called average person often exhibits a great deal of heroism in getting through an ordinary day.
    Ex: This remake of William Castle's action adventure adds a genuinely supernatural plot to the old story of the duplicitous wife scheming to kill her husband but being one-upped by his even more ingenious counterplots.
    Ex: Two dangerous trysts are spied upon by a third and hostile party, whose presence is detected by the lovers who act in consort to outwit him.
    Ex: This novel is narrated by William, an underachiever who is constantly outdone by his charming and lovable identical twin brother.
    Ex: Smart and speedy start-ups blindside mature companies with their inventiveness then grow up into mature companies and are outsmarted in their turn.
    Ex: Without any significant restructuring, the LIS programme in Iran will provide little in the way of riding out the rapid transition that the field is currently experiencing.
    Ex: In the same way, files of item record cards can be difficult to manage if the file size exceeds, say, 2000 cards.
    Ex: It also led to a continuing guerilla war between the authorities and caricaturists who sought to evade, outfox, or entirely defy them.
    Ex: Unfortunately, its conclusions are completely pedestrian, rarely going past the fact that there were old people in England in the late Middle Ages.
    Ex: But he was wiry and wily, too, and he could often out-run, track, back-track, double-back, and finally dodge unseen in the subway.
    Ex: Back in 2001, the tossed salad they prepared fed some 5,000, which then bested the record held by a community in Utah in the United States.
    Ex: If prejudice is allowed to trump the rights that all citizens should enjoy, then everyone's freedoms are ultimately endangered.
    Ex: He is moving on from the past and looking forward to a tremendous future helping to educate parents from his personal experiences.
    Ex: I think Murray will go one better than Wimbledon, but will lose to Federer again in the final.
    * ayudar a superar = get + Nombre + through.
    * capaz de adaptarse y superar adversidades = resilient.
    * con el propósito de superarse uno mismo = self-improvement-oriented.
    * nada supera a = nothing beats....
    * no superar la prueba de = not stand the test of.
    * ser difícil de superar = take + some beating.
    * sin ser superado = unsurpassed.
    * superar Algo = put + Nombre + behind.
    * superar barreras = hurdle + barriers.
    * superar el intento = resist + effort.
    * superar el miedo = overcome + Posesivo + fear, conquer + fear.
    * superar el nerviosismo = overcome + nervousness.
    * superar el problema de credibilidad = overcome + credibility gap.
    * superar en número = outnumber.
    * superar la barrera del tiempo = cross + time barriers.
    * superar la etapa de = move on from.
    * superar las expectativas = exceed + expectations.
    * superarse a sí mismo = pull + Reflexivo + up(wards) by + Posesivo + (own) bootstraps.
    * superarse a Uno Mismo = make + the best of + Reflexivo.
    * superarse para hacer frente a Algo = rise to + meet.
    * superar una barrera = conquer + barrier.
    * superar una crisis = ford + crisis, survive + crisis.
    * superar una deficiencia = overcome + weakness.
    * superar una dificultad = overcome + difficulty, get over + difficulty.
    * superar una limitación = overcome + limitation, tackle + limitation.
    * superar un análisis minucioso = stand up to + scrutiny, stand up to + examination.
    * superar una situación difícil = weather + the bumpy ride, weather + the storm.
    * superar un examen = pass + examination, pass + an exam.
    * superar un obstáculo = overcome + obstacle, jump over + hurdle, overcome + barrier, conquer + barrier.
    * superar un peligro = overcome + danger.
    * superar un problema = surmount + problem, conquer + problem, get over + problem.
    * verse superado sólo por = be second only to.

    * * *
    superar [A1 ]
    vt
    A
    1 (ser superior a, mayor que) to exceed, go beyond
    un éxito que supera todas las expectativas a success which goes beyond o exceeds o surpasses all expectations
    la realidad supera a la ficción fact o truth is stranger than fiction
    el horror de estas escenas supera todo lo imaginable the horror of these scenes goes beyond anything one could imagine
    nadie lo supera en experiencia ni habilidad nobody can surpass him in experience or skill, nobody can surpass his experience or skill
    nos superan en número they outnumber us
    supera en estatura a su hermano mayor he's taller than his elder brother
    supera en tres puntos la cifra de ayer it is three points higher than yesterday's figure, it surpasses yesterday's figure by three points
    2 (mejorar) to beat
    logró superar su propio récord he managed to beat his own record
    ese método está totalmente superado that method has been completely superseded
    B
    1 (vencer, sobreponerse a) ‹timidez/dificultad/etapa› to overcome
    trata de superar estas diferencias try to overcome o get over these differences
    no ha logrado superar el trauma que le supuso el accidente he has not got(ten) over the trauma of the accident
    ya hemos superado la etapa más difícil we've already got(ten) through o over the most difficult stage
    hace tres meses que rompimos pero ya lo tengo superado we split up three months ago but I've got(ten) over it o I'm over it now
    2 ( frml); ‹examen/prueba› to pass
    to better oneself
    * * *

     

    superar ( conjugate superar) verbo transitivo
    1


    nadie lo supera en experiencia no one has more experience than him;
    supera en estatura a su hermano he's taller than his brother
    b) ( mejorar) ‹ marca› to beat

    2
    a) (vencer, sobreponerse a) ‹timidez/dificultad/etapa› to overcome;

    ‹ trauma› to get over
    b) (frml) ‹examen/prueba› to pass

    superarse verbo pronominal
    to better oneself
    superar verbo transitivo
    1 (estar por encima de) to exceed: tu hermana te supera en altura, your sister is taller than you
    la temperatura superó los treinta grados, the temperature rose above thirty degrees
    (expectativas) esto supera todo lo imaginado, this defies the imagination
    (un récord, una marca) to beat, break
    2 (pasar, sobreponerse) to overcome
    (un examen) to pass, get through
    ' superar' also found in these entries:
    Spanish:
    atonía
    - ganar
    - sacar
    - salir
    - salvar
    - sobreponerse
    - vencer
    - volver
    - cabeza
    - creces
    - exceder
    - marca
    English:
    beat
    - beating
    - carry through
    - coast
    - corner
    - deal with
    - excel
    - get over
    - get past
    - handicap
    - improve on
    - outdo
    - outnumber
    - overcome
    - overtake
    - pull through
    - surmount
    - surpass
    - top
    - exceed
    - get
    - negotiate
    - out
    - over
    - rise
    - shrug
    - survive
    - transcend
    * * *
    ♦ vt
    1. [aventajar] to beat;
    superar algo/a alguien en algo to beat sth/sb for sth;
    nos superan en número they outnumber us;
    me supera en altura/inteligencia he's taller/cleverer than me
    2. [sobrepasar] [récord] to break;
    queremos superar los resultados del año pasado we want to improve on o beat last year's results;
    me superó por dos décimas de segundo she beat me by two tenths of a second
    3. [adelantar] to overtake, to pass;
    superó a su rival en la recta final she overtook her rival on the home straight
    4. [época, técnica]
    estar superado to have been superseded
    5. [complejo, crisis, enfermedad] to overcome, to get over;
    no ha superado la pérdida de su mujer he has not overcome the loss of his wife;
    tener algo superado to have got over sth
    6. [examen, prueba] to pass
    * * *
    v/t persona beat; límite go beyond, exceed; obstáculo overcome, surmount
    * * *
    1) : to surpass, to exceed
    2) : to overcome, to surmount
    * * *
    1. (vencer problema, etc) to overcome [pt. overcame; pp. overcome]
    2. (pasar) to pass
    3. (ser mejor) to be better / to surpass
    4. (ser más) to be more / to be over
    el porcentaje de aprobados supera el 85% the percentage of passes is over 85%

    Spanish-English dictionary > superar

  • 5 явление электрической дуги

    1. electric arc phenomenon

     

    явление электрической дуги
    -
    [Интент]

    Параллельные тексты EN-RU

    Electric arc phenomenon

    The electric arc is a phenomenon which takes place as a consequence of a discharge which occurs when the voltage between two points exceeds the insulating strength limit of the interposed gas; then, in the presence of suitable conditions, a plasma is generated which carries the electric current till the opening of the protective device on the supply side.

    Gases, which are good insulating means under normal conditions, may become current conductors in consequence of a change in their chemical-physical properties due to a temperature rise or to other external factors.

    To understand how an electrical arc originates, reference can be made to what happens when a circuit opens or closes.

    During the opening phase of an electric circuit the contacts of the protective device start to separate thus offering to the current a gradually decreasing section; therefore the current meets growing resistance with a consequent rise in the temperature.

    As soon as the contacts start to separate, the voltage applied to the circuit exceeds the dielectric strength of the air, causing its perforation through a discharge.

    The high temperature causes the ionization of the surrounding air which keeps the current circulating in the form of electrical arc. Besides thermal ionization, there is also an electron emission from the cathode due to the thermionic effect; the ions formed in the gas due to the very high temperature are accelerated by the electric field, strike the cathode, release energy in the collision thus causing a localized heating which generates electron emission.

    The electrical arc lasts till the voltage at its ends supplies the energy sufficient to compensate for the quantity of heat dissipated and to maintain the suitable conditions of temperature. If the arc is elongated and cooled, the conditions necessary for its maintenance lack and it extinguishes.

    Analogously, an arc can originate also as a consequence of a short-circuit between phases. A short-circuit is a low impedance connection between two conductors at different voltages.

    The conducting element which constitutes the low impedance connection (e.g. a metallic tool forgotten on the busbars inside the enclosure, a wrong wiring or a body of an animal entered inside the enclosure), subject to the difference of potential is passed through by a current of generally high value, depending on the characteristics of the circuit.

    The flow of the high fault current causes the overheating of the cables or of the circuit busbars, up to the melting of the conductors of lower section; as soon as the conductor melts, analogous conditions to those present during the circuit opening arise. At that point an arc starts which lasts either till the protective devices intervene or till the conditions necessary for its stability subsist.

    The electric arc is characterized by an intense ionization of the gaseous means, by reduced drops of the anodic and cathodic voltage (10 V and 40 V respectively), by high or very high current density in the middle of the column (of the order of 102-103 up to 107 A/cm2), by very high temperatures (thousands of °C) always in the middle of the current column and – in low voltage - by a distance between the ends variable from some microns to some centimeters.
    [ABB]

    Явление электрической дуги

    Электрическая дуга между двумя электродами в газе представляет собой физическое явление, возникающее в тот момент, когда напряжения между двумя электродами превышает значение электрической прочности изоляции данного газа.
    При наличии подходящих условий образуется плазма, по которой протекает электрический ток. Ток будет протекать до тех пор, пока на стороне электропитания не сработает защитное устройство.

    Газы, являющиеся хорошим изолятором, при нормальных условиях, могут стать проводником в результате изменения их физико-химических свойств, которые могут произойти вследствие увеличения температуры или в результате воздействия каких-либо иных внешних факторов.

    Для того чтобы понять механизм возникновения электрической дуги, следует рассмотреть, что происходит при размыкании или замыкании электрической цепи.

    При размыкании электрической цепи контакты защитного устройства начинают расходиться, в результате чего постепенно уменьшается сечение контактной поверхности, через которую протекает ток.
    Сопротивление электрической цепи возрастает, что приводит к увеличению температуры.

    Как только контакты начнут отходить один от другого, приложенное напряжение превысит электрическую прочность воздуха, что вызовет электрический пробой.

    Высокая температура приведет к ионизации воздуха, которая обеспечит протекание электрического тока по проводнику, представляющему собой электрическую дугу. Кроме термической ионизации молекул воздуха происходит также эмиссия электронов с катода, вызванная термоэлектронным эффектом. Образующиеся под воздействием очень высокой температуры ионы ускоряются в электрическом поле и бомбардируют катод. Высвобождающаяся, в результате столкновения энергия, вызывает локальный нагрев, который, в свою очередь, приводит к эмиссии электронов.

    Электрическая дуга длится до тех пор, пока напряжение на ее концах обеспечивает поступление энергии, достаточной для компенсации выделяющегося тепла и для сохранения условий поддержания высокой температуры. Если дуга вытягивается и охлаждается, то условия, необходимые для ее поддержания, исчезают и дуга гаснет.

    Аналогичным образом возникает дуга в результате короткого замыкания электрической цепи. Короткое замыкание представляет собой низкоомное соединение двух проводников, находящихся под разными потенциалами.

    Проводящий элемент с малым сопротивлением, например, металлический инструмент, забытый на шинах внутри комплектного устройства, ошибка в электромонтаже или тело животного, случайно попавшего в комплектное устройство, может соединить элементы, находящиеся под разными потенциалами, в результате чего через низкоомное соединение потечет электрический ток, значение которого определяется параметрами образовавшейся короткозамкнутой цепи.

    Протекание большого тока короткого замыкания вызывает перегрев кабелей или шин, который может привести к расплавлению проводников с меньшим сечением. Как только проводник расплавится, возникает ситуация, аналогичная размыканию электрической цепи. Т. е. в момент размыкания возникает дуга, которая длится либо до срабатывания защитного устройства, либо до тех пор, пока существуют условия, обеспечивающие её стабильность.

    Электрическая дуга характеризуется интенсивной ионизацией газов, что приводит к падению анодного и катодного напряжений (на 10 и 40 В соответственно), высокой или очень высокой плотностью тока в середине плазменного шнура (от 102-103 до 107 А/см2), очень высокой температурой (сотни градусов Цельсия) всегда в середине плазменного шнура и низкому падению напряжения при расстоянии между концами дуги от нескольких микрон до нескольких сантиметров.
    [Перевод Интент]

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    Русско-английский словарь нормативно-технической терминологии > явление электрической дуги

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