释义 |
transient
tran·si·ent T0318600 (trăn′zē-ənt, -zhənt, -shənt)adj.1. Passing with time; transitory: "the transient beauty of youth" (Lydia M. Child).2. Remaining in a place only a brief time: transient laborers.3. Physics Decaying with time, especially as a simple exponential function of time.n.1. One that is transient, especially a hotel guest or boarder who stays for only a brief time.2. Physics A transient phenomenon or property, especially a transient electric current. [Alteration of Latin trānsiēns, trānseunt-, present participle of trānsīre, to go over : trāns-, over; see trans- + īre, to go; see ei- in Indo-European roots.] tran′si·ent·ly adv.transient (ˈtrænzɪənt) adj1. for a short time only; temporary or transitory2. (Philosophy) philosophy a variant of transeuntn3. a transient person or thing4. (General Physics) physics a brief change in the state of a system, such as a sudden short-lived oscillation in the current flowing through a circuit[C17: from Latin transiēns going over, from transīre to pass over, from trans- + īre to go] ˈtransiently adv ˈtransience, ˈtransiency ntran•sient (ˈtræn ʃənt, -ʒənt, -zi ənt) adj. 1. not lasting, enduring, or permanent; transitory. 2. lasting only a short time; existing briefly; temporary: transient authority. 3. staying only a short time: transient guests at a hotel. n. 4. a person or thing that is transient, esp. a temporary guest, boarder, or laborer. 5. Physics. a. a nonperiodic signal of short duration. b. a decaying signal, wave, or oscillation. 6. a sudden pulse of voltage or current. [1590–1600; < Latin transi(ēns), present participle of transīre to cross, pass (see transit) + -ent] tran′science, tran′scien•cy, n. tran′sient•ly, adv. syn: See temporary. transient1. Personnel, ships, or craft stopping temporarily at a post, station, or port to which they are not assigned or attached, and having destination elsewhere. 2. An independent merchant ship calling at a port and sailing within 12 hours, and for which routing instructions to a further port have been promulgated. 3. An individual awaiting orders, transport, etc., at a post or station to which he or she is not attached or assigned.ThesaurusNoun | 1. | transient - one who stays for only a short time; "transient laborers"traveler, traveller - a person who changes location | | 2. | transient - (physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or loadnatural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"oscillation, vibration - (physics) a regular periodic variation in value about a mean | Adj. | 1. | transient - of a mental act; causing effects outside the mindtranseuntphilosophy - the rational investigation of questions about existence and knowledge and ethics | | 2. | transient - lasting a very short time; "the ephemeral joys of childhood"; "a passing fancy"; "youth's transient beauty"; "love is transitory but it is eternal"; "fugacious blossoms"ephemeral, fugacious, passing, short-lived, transitoryimpermanent, temporary - not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing" |
transientadjective brief, passing, short-term, temporary, short, flying, fleeting, short-lived, fugitive, momentary, ephemeral, transitory, evanescent, impermanent, here today and gone tomorrow, fugacious the transient nature of high fashion lasting, long-term, permanent, constant, enduring, persistent, eternal, abiding, durable, perpetual, long-lasting, undying, imperishabletransientadjectiveLasting or existing only for a short time:ephemeral, evanescent, fleet, fleeting, fugacious, fugitive, momentary, passing, short-lived, temporal, temporary, transitory.Translationstransienttransitorischtransitoiretransitoriotransient
transient Physics a brief change in the state of a system, such as a sudden short-lived oscillation in the current flowing through a circuit Transient (or transient phenomenon). A transient in an electric circuit is a phenomenon that occurs during a transition from one circuit condition to another that differs from the initial condition in the amplitude, phase, shape, or frequency of the voltage acting in the circuit, the values of the parameters, or the configuration of the circuit. Transients occur chiefly when circuit elements are switched into or out of the circuit. The transients arise because the current flowing through an inductance and the voltage across a capacitance cannot be altered abruptly—that is, the energy of the electric and magnetic fields in the circuit’s capacitive and inductive elements cannot be changed instantaneously. Theoretically speaking, a transient continues for an indefinite period because the voltage and current in an electric circuit after the closing or opening of a switch approach their final (steady-state) values asymptotically. In electrical engineering, however, a transient is considered to be ended when the voltage and current reach values differing from the steady-state values by 5 to 10 percent, a condition that occurs within a comparatively short finite interval of time. An electric circuit that is characterized by constant or periodically varying currents and voltages is said to be in a steady-state condition. A simple example of a transient is the charging of a capacitor C (Figure 1) from a DC source (a storage battery) having an electromotive force (emf) E and an internal resistance r through a resistor R, which limits the current in the circuit. If the switch is closed at the time t = 0, the current in the circuit decreases according to an exponential law and approaches zero. Simultaneously, the voltage increases and approaches asymptotically the value of the source emf. The rate of change of the voltage and the current depend on the capacitance of the capacitor and the resistance in the circuit: the larger the capacitance and resistance, the longer the duration of the charging process. After a time interval τ = (R + r)C, called the time constant for the charging of the capacitor, the voltage across the capacitor’s plates attains the value uc = 0.6327, and the current i reaches 0.37I0, where I0 is the initial current. I0 is equal to the ratio of the emf and the resistance in the circuit. After a time interval of 5τ;, UC > 0.99E and i < 0.01I0; with an error of less than 1 percent, the transient can be regarded as having ended. During the transient, the energy of the capacitor’s electric field is increased from zero to Wc = CE2/2. During a transient, in individual parts of a circuit there may occur voltage surges and overcurrents—that is, voltages and currents substantially greater than the steady-state voltages and currents. When equipment is not selected properly, the voltage surges can result in the breakdown of insulation in, for example, capacitors, transformers, and electrical machines. Overcurrents can cause the actuation of protective devices and the disconnection of equipment; they can burn out instruments, burn contacts, and cause mechanical damage to windings as a result of electro-dynamic stresses. Transients play an exceptionally important role in automatic control systems, pulse engineering, computer technology, measurement technology, electronics, radio engineering, and power engineering. REFERENCESOsnovy teorii tsepei. Moscow-Leningrad, 1965. Neiman, L. R., and K. S. Demirchian. Teoreticheskie osnovy elektrotekhniki, vol. 1. Leningrad, 1967. Ginzburg, S. G. Metody resheniia zadach po perekhodnym protsessam ν elektricheskikh tsepiakh, 3rd ed. Moscow, 1967. Venikov, V. A. Perekhodnye elektromekhanicheskie protsessy ν elektricheskikh sistemakh. Moscow, 1970. Teoreticheskie osnovy elektrotekhniki, part 1. Moscow, 1972. Bessonov, L. A. Teoreticheskie osnovy elektrotekhniki. Moscow, 1973.B. IA. ZHUKHOVITSKII transient[′tranch·ənt] (physics) A pulse, damped oscillation, or other temporary phenomenon occurring in a system prior to reaching a steady-state condition. transient1. A sudden, brief increase in current orvoltage in a circuit that can damage sensitive componentsand instruments.transientA malfunction that occurs at random intervals and lasts for a short duration such as a spike or surge in a power line or a memory cell that intermittently fails. See spike and power surge.transient
tran·sient (trans'shĕnt, -sē-ĕnt), 1. Short-lived; passing; not permanent; said of a disease or an attack. 2. A short-lived cardiac sound having little duration (less than 0.12 seconds) as distinct from a murmur; for example, first, second, third, and fourth heart sounds, clicks, and opening snaps. [L. transeo, pres. p. transiens, to cross over] insomnia Sleep disorders The perceived or actual inability to sleep one's usual amount of time; a condition characterized by any combination of difficulty with falling asleep, staying asleep, intermittent wakefulness, and early-morning awakening; episodes may be transient, short-term–lasting 2 to 3 wks, or chronic Triggers Illness, depression, anxiety, stress, poor sleep environment, caffeine, abuse of alcohol, heavy smoking, physical discomfort, daytime napping, medical conditions, poor sleep habits–eg, early bedtime, excessive time awake in bed Examples Psychophysiologic–learned insomnia, delayed sleep phase syndrome, hypnotic dependent sleep disorder, stimulant dependent sleep disorder. See Circadian rhythm, Conditioned insomnia, Familial fatal insomnia, Jet lag, Pseudoinsomnia, Rebound insomnia, REM sleep, Sleep disorder, Sleep-onset insomnia. Insomnia Chronologic classification • Transient–eg, 'jet lag'; does not require treatment • Short term < 3 weeks in duration, due to travel to high altitudes, grieving loss of loved one, hospitalization, pain • Long term > 3 weeks in duration, eg related to medical, neurologic or psychiatric disorders or addiction Etiology • Pharmacologic Due to coffee, nicotine, alcohol • Rebound (withdrawal) Related to abrupt discontinuation of hypnotic drugs • Delayed sleep phase Due to shift work, chronic pain, sleep apnea and restless leg syndrome
alopecia Baldness Dermatology 1. Loss or absence of hair on the scalp.2. Baldness, see there See Hair replacement, Hot comb alopecia, Moth-eaten alopecia. Alopecia types - Male pattern
- On the front and top–blame mother
- Patchy
- Alopecia areata–blame mother, angry lover
- Permanent
- Related to RT–blame radiation oncologist
- Total
- Alopecia capitis totalis–blame mother
- Transient
- Due to chemotherapy—cyclophosphamide, cytosine arabinoside, doxorubicin–blame oncologist
. .tran·si·ent (tran'sē-ĕnt) 1. Short-lived; not permanent. 2. A short-lived cardiac sound of short duration as distinct from a murmur. [L. transeo, pres. p. transiens, to cross over]tran·si·ent (trans'shĕnt, -sē-ĕnt) Short-lived; passing; not permanent. [L. transeo, pres. p. transiens, to cross over]FinancialSeespikeSee TSNT See TSNTtransient Related to transient: transient global amnesia, transient ischemic attackSynonyms for transientadj briefSynonyms- brief
- passing
- short-term
- temporary
- short
- flying
- fleeting
- short-lived
- fugitive
- momentary
- ephemeral
- transitory
- evanescent
- impermanent
- here today and gone tomorrow
- fugacious
Antonyms- lasting
- long-term
- permanent
- constant
- enduring
- persistent
- eternal
- abiding
- durable
- perpetual
- long-lasting
- undying
- imperishable
Synonyms for transientadj lasting or existing only for a short timeSynonyms- ephemeral
- evanescent
- fleet
- fleeting
- fugacious
- fugitive
- momentary
- passing
- short-lived
- temporal
- temporary
- transitory
Synonyms for transientnoun one who stays for only a short timeRelated Wordsnoun (physics) a short-lived oscillation in a system caused by a sudden change of voltage or current or loadRelated Words- natural philosophy
- physics
- oscillation
- vibration
adj of a mental actSynonymsRelated Wordsadj lasting a very short timeSynonyms- ephemeral
- fugacious
- passing
- short-lived
- transitory
Related Words |