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efficiency
ef·fi·cien·cy E0049500 (ĭ-fĭsh′ən-sē)n. pl. ef·fi·cien·cies 1. a. The quality or property of being efficient.b. The degree to which this quality is exercised: The program was implemented with great efficiency and speed.2. a. The ratio of the effective or useful output to the total input in any system.b. The ratio of the energy delivered by a machine to the energy supplied for its operation.3. An efficiency apartment.efficiency (ɪˈfɪʃənsɪ) n, pl -cies1. the quality or state of being efficient; competence; effectiveness2. (General Physics) the ratio of the useful work done by a machine, engine, device, etc, to the energy supplied to it, often expressed as a percentage. See also thermal efficiencyef•fi•cien•cy (ɪˈfɪʃ ən si)
n., pl. -cies. 1. the state or quality of being efficient. 2. accomplishment of or ability to accomplish a job with a minimum expenditure of time and effort. 3. the ratio of the work done by a machine to the energy supplied to it, usu. expressed as a percentage. 4. efficiency apartment. [1585–95; < Latin] Efficiency cooking with gas Operating at maximum efficiency; performing well, functioning smoothly; really in the groove or on the right track. The expression probably comes from the efficiency of gas as a cooking medium (as contrasted with coal, wood, kerosene, electricity, etc.). Occasionally the phrase is jocularly updated by variants such as cooking with electricity or cooking with radar. hit on all six To run smoothly; to function properly; to work to one’s fullest capacity; to be in physically fit and trim condition. This Americanism was originally used in speaking of internal combustion engines, specifically the functioning of the cylinders, which often misfired in earlier cars. When the figurative use gained currency, the word cylinder was dropped from the end of the expression. Variants include hit on all four and other multiples of two. Modern science offers you a natural means to keep you “hitting on all six”—every minute of the day. (Saturday Evening Post, March 10, 1928) in the groove In full swing, functioning smoothly, in top form. This U.S. slang expression was coined in the jazz age. Groove originally referred to the grooves of phonograph records. In the 1930s and ’40s, in the groove meant to play jazz music fervently and expertly, or to appreciate such music and by association be considered “hep” and sophisticated. The jazz musicians gave no grandstand performances; they simply got a great burn from playing in the groove. (Fortune, August, 1933) Eventually in the groove and groovy grew to mean ‘up-to-date’ or ‘fashionable,’ although this use is now being phased out of current slang. When in the groove is used, as in the following quotation from Webster’s Third, it emphasizes the quality of being in top form, rather than sophistication or fashionableness. It made no difference, when he was in the groove, what he chose to talk about. (Henry Miller) just like New York This American slang expression, usually an isolated comment on successful performance, has a wide range of equally vague equivalents such as right on, great, nice going, way to go. The reference is to New York City as the epitome of success, society, and fashion. efficiencyThe ratio of a machine’s energy output to energy input.Thesaurus| Noun | 1. | efficiency - the ratio of the output to the input of any systemratio - the relative magnitudes of two quantities (usually expressed as a quotient)figure of merit - a numerical expression representing the efficiency of a given system, material, or procedure | | 2. | efficiency - skillfulness in avoiding wasted time and effort; "she did the work with great efficiency"skillfulness - the state of being cognitively skillfuleconomy - the efficient use of resources; "economy of effort"inefficiency - unskillfulness resulting from a lack of efficiency |
efficiencynoun1. effectiveness, power, economy, productivity, organization, efficacy, cost-effectiveness, orderliness ways to increase agricultural efficiency2. competence, ability, skill, expertise, capability, readiness, professionalism, proficiency, adeptness, skilfulness her efficiency as a managerefficiencynoun1. The quality of being efficient:productivity.2. The power or capacity to produce a desired result:effect, effectiveness, effectuality, effectualness, efficaciousness, efficacy, influence, potency.Translationsefficient (iˈfiʃənt) adjective1. (of a person) capable; skilful. a very efficient secretary. 有能力的 有能力的2. (of an action, tool etc) producing (quick and) satisfactory results. The new lawn mower is much more efficient than the old one. 效率高的 效率高的efˈficiently adverb 有效率地 有效地，效率高地 efˈficiency noun 效率 效率efficiency
efficiency. 1 In business and industry, see industrial managementindustrial management,
term applied to highly organized modern methods of carrying on industrial, especially manufacturing, operations. The Rise of Factories
..... Click the link for more information. ; productivityproductivity,
in economics, the output of any aspect of production per unit of input. It is a measure of the output of a worker, machine, or an entire national economy in the creation of goods and services to produce wealth.
..... Click the link for more information. . 2 In physics, seemachinemachine,
arrangement of moving and stationary mechanical parts used to perform some useful work or to provide transportation. From a historical perspective, many of the first machines were the result of human efforts to improve war-making capabilities; the term engineer
..... Click the link for more information. ; workwork,
in physics and mechanics, transfer of energy by a force acting to displace a body. Work is equal to the product of the force and the distance through which it produces movement.
..... Click the link for more information. .Efficiency a parameter characterizing the effectiveness of a system, device, or machine in converting or transmitting energy; it is defined as the ratio of the usefully consumed energy to the total energy received by a system. It is usually denoted as η = Wuse/ Wtot- In electric motors the efficiency is the ratio of the mechanical work (useful work) performed to the electric power received from a source; in heat engines it is the ratio of the useful mechanical work to the amount of heat expended; in electric transformers it is the ratio of the electromagnetic energy produced in the secondary winding to the energy consumed by the primary winding. In calculating efficiency, various forms of energy and mechanical work are expressed in the same units based on the mechanical equivalent of heat and other similar relationships. Because of its generality the concept of efficiency makes possible the comparison and evaluation of such dissimilar systems as atomic reactors, electric generators and motors, steam power plants, semiconductor devices, and biological substances from a single point of view. Because of the unavoidable energy losses caused by friction, heating of surrounding bodies, and so on, the efficiency is always less than 1. Therefore, it is expressed in fractions of the energy consumed—that is, in the form of a proper fraction or percentages—and is a dimensionless quantity. The efficiency of steam power plants reaches 35-40 percent; that of internal-combustion engines, 40-50 percent; that of high-power dynamos and generators, up to 95 percent; and that of transformers, up to 98 percent. The efficiency of the process of photosynthesis is usually 6-8 percent; and for chlorella it attains 20-25 percent. By virtue of the second law of thermodynamics the upper limit of the efficiency of heat engines is determined by the characteristics of the thermodynamic cycle (a cyclic process) performed by the working substance. The Carnot cycle has the highest efficiency. A distinction is made between the efficiency of one stage of a machine or installation and the efficiency that characterizes the entire energy conversion chain in a system. Efficiency of the first type may be mechanical, thermal, and so on, depending on the nature of the energy conversion. The second type includes the total, economic, and technical forms of efficiency. The total efficiency of a system is equal to the product of the partial or stage efficiencies. In the technical literature efficiency is sometimes defined in such a manner that it can be greater than 1. Such a situation occurs if, in the determination of efficiency by means of the ratio Wuse/Wcon, the term Wuse is the useful energy obtained at the “output” of a system and Wcon is not all the energy put into the system but rather only the part that brings about the actual consumption. For example, during the operation of semiconductor thermoelectric heaters (heat pumps) the consumption of electric power is less than the amount of heat produced by the thermoelement. The excess energy is drawn from the environment. In this case, although the true efficiency is less than 1, the efficiency in question ö = Wuse/Wcon can be greater than 1. REFERENCESArtobolevskii, I. I. Teoriia mekhanizmov i mashin, 2nd ed. Moscow-Leningrad, 1952.
Obshchaia teplotekhnika, 2nd ed. Edited by S. la. Kornitskii and la. M. Rubinshtein. Moscow-Leningrad, 1952.
Obshchaia elektrotekhnika. Moscow-Leningrad, 1951.
Vukalovich, M. P., and I. I. Novikov. Tekhnicheskaia termodinamika, 4th ed. Moscow, 1968.efficiency[ə′fish·ən·sē] Abbreviated eff. (chemistry) In an ion-exchange system, a measurement of the effectiveness of a system expressed as the amount of regenerant required to remove a given unit of adsorbed material. (engineering) Measure of the degree of heat output per unit of fuel when all available oxidizable materials in the fuel have been burned. Ratio of useful energy provided by a dynamic system to the energy supplied to it during a specific period of operation. (nucleonics) The probability that a count will be produced in a counter tube by a specified particle or quantum incident. (physics) The ratio, usually expressed as a percentage, of the useful power output to the power input of a device. (statistics) An estimator is more efficient than another if it has a smaller variance. An experimental design is more efficient than another if the same level of precision can be obtained in less time or with less cost. (thermodynamics) The ratio of the work done by a heat engine to the heat energy absorbed by it. Also known as thermal efficiency. Efficiency The ratio, expressed as a percentage, of the output to the input of power (energy or work per unit time). As is common in engineering, this concept is defined precisely and made measurable. Thus, a gear transmission is 97% efficient when the useful energy output is 97% of the input, the other 3% being lost as heat due to friction. A boiler is 75% efficient when its product (steam) contains 75% of the heat theoretically contained in the fuel consumed. All automobile engines have low efficiency (below 30%) because of the total energy content of fuel converted to heat; only a portion provides motive power, while a substantial amount is lost in radiator and car exhaust. efficiencyThe ratio of output to input or the ratio of work done to the effort put in. Unless specifically stated otherwise, it means efficiency with respect to power. The efficiency of any device refers to a physical quantity that may be stored, transferred, or transformed by the device.efficiency
ef·fi·cien·cy (e-fish'en-sē), 1. The production of the desired effects or results with minimum waste of time, money, effort, or skill. 2. A measure of effectiveness; specifically, the useful work output divided by the energy input. efficiency Lab medicine The relative ability of a test to detect a disease, while maintaining the rate of false positive results to a minimum; the efficiency of a test is defined as the number of true positives and true negatives multiplied by one hundred, divided by the sum of true positives, true negatives, false positives and false negatives. Cf Four cell diagnostic matrix. ef·fi·cien·cy (ĕ-fish'ĕn-sē) 1. The production of the desired effects or results with minimum waste of time, effort, or skill. 2. A measure of effectiveness; specifically, the useful work output divided by the energy input. ef·fi·cien·cy (ĕ-fish'ĕn-sē) 1. Production of desired effects or results with minimum waste of time, money, effort, or skill. 2. Measure of effectiveness; specifically, useful work output divided by the energy input. Patient discussion about efficiencyQ. Is electric shock efficient for ocd? Is it dangerous? My husband has OCD for 15 years now. He was also diagnosed with mania-depressia. He takes so many medications and nothing really helps. We were offered to try electric shock and I'm scared. Is it dangerous? What are the chances of this method to work for him?A. Electroconvulsive therapy (ECT) is indeed considered effective for OCD, although it's not the first line of treatment. It does have its risks, including memory loss, disorientation and sort of confusion. There is also a change in the activity of the heart but it's rarely significant.
Generally it can be said that it's not an absolutely safe treatment, but it may help, especially if other drugs don't help.
You may read more here:
http://www.nlm.nih.gov/medlineplus/ency/article/003324.htm
More discussions about efficiencyefficiency
EfficiencyThe degree and speed with which a market accurately incorporates information into prices.Market EfficiencyThe extent to which the price of an asset reflects all information available. Economists disagree on how efficient markets are. Followers of the efficient markets theory hold that the market efficiently deals with all information on a given security and reflects it in the price immediately, and that technical analysis, fundamental analysis, and/or any speculative investing based on those methods are useless. On the other hand, the primary observation of behavioral economics holds that investors (and people in general) make decisions on imprecise impressions and beliefs, rather than rational analysis, rendering markets somewhat inefficient to the extent that they are affected by people.efficiency the relationship between the quantities of factor inputs (labour, materials, etc.) used by a firm and the quantity of output which it is able to produce using these inputs. Where a firm is able to produce the same output using fewer inputs or produce more output using the same quantity of inputs then it has improved its efficiency See PRODUCTIVITY.efficiency the relationship between scarce FACTOR INPUTS and OUTPUTS of goods and services. This relationship can be measured in physical terms (TECHNOLOGICAL EFFICIENCY) or cost terms (ECONOMIC EFFICIENCY). The concept of efficiency is used as a criterion in judging how well MARKETS have allocated resources. See MARKET PERFORMANCE, RESOURCE ALLOCATION, ECONOMIZE.See EFFCY
See EFFefficiency
Synonyms for efficiencynoun effectivenessSynonyms- effectiveness
- power
- economy
- productivity
- organization
- efficacy
- cost-effectiveness
- orderliness
noun competenceSynonyms- competence
- ability
- skill
- expertise
- capability
- readiness
- professionalism
- proficiency
- adeptness
- skilfulness
Synonyms for efficiencynoun the quality of being efficientSynonymsnoun the power or capacity to produce a desired resultSynonyms- effect
- effectiveness
- effectuality
- effectualness
- efficaciousness
- efficacy
- influence
- potency
Antonyms for efficiencynoun the ratio of the output to the input of any systemRelated Wordsnoun skillfulness in avoiding wasted time and effortRelated WordsAntonyms |