| 释义 |
matching
match 1 M0147100 (măch) n. 1. a. One that is exactly like another or a counterpart to another: Is there a match for this glove in the drawer? b. One that is like another in one or more specified qualities: He is John's match for bravery. 2. One that is able to compete equally with another: The boxer had met his match. 3. a. One that closely resembles or harmonizes with another: The napkins were a nice match for the tablecloth. b. A pair, each one of which resembles or harmonizes with the other: The colors were a close match. 4. Sports a. A game or contest in which two or more persons, animals, or teams oppose and compete with each other: a soccer match. b. A tennis contest won by the player or side that wins a specified number of sets, usually two out of three or three out of five. 5. A marriage or an arrangement of marriage: a royal match. 6. A person viewed as a prospective marriage partner. v. matched, match·ing, match·es v. tr. 1. a. To be like (another) or be a counterpart to: Does this sock match that one? b. To resemble or harmonize with: The coat matches the dress. 2. To adapt or suit so that a balanced or harmonious result is achieved; cause to correspond: You should match your deeds to your beliefs. 3. To find or produce a counterpart to: It's difficult to match the color of old paint. 4. To pair (someone) with another in a romantic relationship or marriage: She was hoping to match her cousin with her neighbor. 5. To place in opposition or competition; pit: She matched her skill against all comers. 6. To provide with an adversary or competitor: The tournament matches the best offensive team with the best defensive team. 7. To do as well as or better than in competition; equal: She easily matches me in bicycle racing. 8. To set in comparison; compare: beauty that could never be matched. 9. To provide funds so as to equal or complement: The government will match all private donations to the museum. 10. To flip or toss (coins) and compare the sides that land face up. 11. To couple (electric circuits) by means of a transformer. v. intr. 1. To be exactly like another; correspond exactly: Do the two socks match? 2. To harmonize with another: My shirt and my tie match.
[Middle English macche, from Old English gemæcca, companion, mate; see mag- in the Appendix of Indo-European roots.]
match′er n.
match 2 M0147100 (măch)n.1. A narrow piece of material, usually wood or cardboard, coated on one end with a compound that ignites when scratched against a rough or chemically treated surface.2. An easily ignited cord or wick, formerly used to detonate powder charges or to fire cannons and muzzle-loading firearms.
[Middle English mecche, macche, lamp wick, from Anglo-Norman meche, mesche, perhaps ultimately from Latin myxa, a lamp's nozzle, from Greek muxa, mucus, lamp wick.]Thesaurus| Adj. | 1. |  matching - being two identical twin, twinned, duplicatematched - going well together; possessing harmonizing qualities | | 2. |  matching - intentionally matched; "curtains and walls were color coordinated"co-ordinated, coordinatedmatched - going well together; possessing harmonizing qualities |
matchingadjective identical, like, same, double, paired, equal, toning, twin, equivalent, parallel, corresponding, comparable, duplicate, coordinating, analogous She made matching cushion covers.
different, unlike, distinct, other, diverse, disparate, unequal, dissimilar, divergent, nonparallelTranslationsmatching
matching (impedance matching) Arranging electrical impedances so that maximum power is transferred from one device to another. This occurs when the input impedance of one device equals the output impedance of the other to which it is connected. See also feeder.MatchingUsed to describe the arrangement of timber veneers, such as book-matching, slip-matching and quarter-matching.Matching in electrical circuit design, the practice that ensures the transmission of electromagnetic energy and signals with the lowest possible reflection factor, signal loss, and distortion. Matching consists in the proper choice of impedances for the source, transmission line, and load. Line and load are ideally matched when the characteristic impedance of the transmission line p is equal to the impedance of the load Zl = Rl + jXl or when Rl = ρ and Xl = 0, where Rl is the active part of the impedance and Xl is the reactive part. Under these circumstances, traveling waves characterized by a standing-wave ratio of unity are established in the transmission line. For lines with negligibly small electrical losses, matching—and, consequently, the maximum effective transfer of energy from the source to the load—is achieved when the impedance of the source Zs and the load Z, are complex conjugates, that is, when  or Rs = ρ = Rl and Xs = – Xl. In this case, the reactive impedance of the circuit is zero, and the conditions for resonance are satisfied. Such conditions enable electrical systems to operate with better efficiency, for example, with improved use of frequency ranges, better interference rejection, and reduced frequency distortion of radio signals. Matching is especially important in microwave engineering, where it can be achieved by means of the following: impedance-matching transformers, such as stubs or dielectric sleeves inserted in the transmission line or sections of transmission lines with specially chosen characteristic impedances and lengths; various matching devices that compensate the reactive components of the impedance, such as stubs, phase shifters, and irises, placed in the transmission line; absorbing loads; directional couplers; and various devices for converting from one mode of transmission to another, such as coaxial-waveguide couplers, baluns, and flexible and rotating connections. The degree of matching can be assessed by measuring the reflection factor and the standing-wave ratio. In practice, matching is considered optimum when the standing-wave ratio in the chosen frequency range does not exceed 1.2 or 1.3 (1.05 for measuring instruments). In some cases, the response of source parameters, such as frequency, power, and noise level, to changes in load, the occurrence of electrical breakdowns in the line, and heating in some sections of the line can serve as indirect indicators of matching. REFERENCESFizicheskie osnovy elektrotekhniki. Edited by K. M. Polivanov. Moscow-Leningrad, 1950.
Valitov, R. A., and V. N. Sretenskii. Radiotekhnicheskie izmereniia. Moscow, 1970.
Lebedev, I. V. Tekhnika i pribory SVCh, 2nd ed., vol. 1. Moscow, 1970.
Gonorovskii, I. S. Radiotekhnicheskie tsepi i signaly, 2nd ed. Moscow, 1971.V. N. SRETENSKII matching[′mach·iŋ] (computer science) A computer problem-solving method in which the current situation is represented as a schema to be mapped into the desired situation by putting the two in correspondence. (electricity) Connecting two circuits or parts together with a coupling device in such a way that the maximum transfer of energy occurs between the two circuits, and the impedance of either circuit will be terminated in its image. (mathematics) A set of edges in a graph, no two of which have a vertex in common. Also known as independent edge set. (navigation) The bringing of two or more signals or indications into suitable position or condition preliminary to making a measurement, as on a loran indicator or a sky compass. matching  matching, 2 A system of matchboards, or of sheets of wood veneer, arranged to emphasize grain pattern, as in book matching or herringbone matching.matching
matching [mach´ing] 1. comparison and selection of objects having similar or identical characteristics.2. the selection of compatible donors and recipients for transfusion or transplantation. See also typing.3. the selection of subjects for clinical trials or other studies so that the different groups being compared are similar in specified characteristics, e.g., age, sex, or race, in order to reduce bias caused by comparison of dissimilar groups. Matching may be on an individual (matched pairs) or a group-wide basis.cross matching crossmatching.match·ing (match'ing), The process of making a study group and a comparison group in an epidemiologic study comparable with respect to extraneous or confounding factors such as age, gender, and weight.matching EBM
The grouping of individuals or groups by researchers based on particular variables thought to be important (such as gender or age). In a case-control study, if the controls are chosen because of particular similarities to the people who are in the case group, the cases and controls are said to be “matched”.
Social medicine
The attempt to select adoptive parents similar to the child being adopted, as in appearance, interests, intelligence, personality or other traits, so as to achieve the best outcome for the adoption.matching Clinical trials A process by which a study group and comparison group are 'equalized' with respect to factors viewed as extraneous to the study's central questions, that might interfere with interpreting data on study completion. See Case-control study. Cf Match. match·ing (mach'ing) The process of making a study group and a comparison group in an epidemiologic study comparable with respect to extraneous or confounding factors such as age, sex, and weight. match·ing (mach'ing) Process of making a study group and a comparison group in an epidemiologic study comparable with respect to extraneous or confounding factors. Patient discussion about matchingQ. Hi members, after I notice that our symptoms match those of fibromyalgia. Hi members, after I notice that our symptoms match those of fibromyalgia, do we have to live with it and simply manage it for the rest of our life or try some luck with food and meds? Thanks.A. If you could have given a particular age details then it could have been easy to analyze. This condition is relatively new, yet it's appearing in epidemic numbers. Dr. Whiting (an orthomolecular nutritionist), finds in his work with people suffering with this that they are all very toxic. When their systems have been properly detoxified their symptoms will disappear. His personal feeling is that this is a condition of hyper-toxicity and manifests itself in people who are unable to physically cope with the overload of toxins in their system. More discussions about matchingmatching
Cash Flow MatchingThe practice of matching returns on a portfolio to future capital outlays. That is, cash flow matching involves investing in certain securities with a certain expected return so that the investor will be able to pay for future liabilities. Pension funds and annuities perform the most cash flow matching, as they have future liabilities that are both large and relatively easy to estimate. Portfolios that perform cash flow matching usually invest in low-risk, investment-grade securities. The practice is also called portfolio dedication, matching, or the structured portfolio strategy.matching See portfolio dedication.matching the process of matching revenues and profits with the associated expenses incurred in earning these revenues. See ACCRUALS PRINCIPLE OF ACCOUNTING.matching
Related to matching: Matching concept, Matching gamesSynonyms for matchingadj identicalSynonyms- identical
- like
- same
- double
- paired
- equal
- toning
- twin
- equivalent
- parallel
- corresponding
- comparable
- duplicate
- coordinating
- analogous
Antonyms- different
- unlike
- distinct
- other
- diverse
- disparate
- unequal
- dissimilar
- divergent
- nonparallel
Synonyms for matchingadj being two identicalSynonymsRelated Wordsadj intentionally matchedSynonymsRelated Words |