تعريف r-value في الإنجليزية الإنجليزية القاموس.
- Resistance-value - A measure of thermal resistance used in domestic insulation
- A unit of thermal resistance, the opposite of thermal conductance The higher the R value, the greater the insulating quality
- A number assigned to thermal insulation to measure the insulation's resistance to heat flow The higher the number, the better the insulation
- A measure of thermal resistance used to compare insulating values The higher the R-value number of a material, the better its insulating properties and the slower the heat flows through it Optimum Utility Systems provides evaluations of roof, wall, floor, piping, and equipment insulation at manufacturing and processing sites and recommends cost-effective improvements See related article
- Resistance a material has to heat flow The higher the R-value, the greater the resistance
- Measure of resistance to heat flow The R-value is the reciprocal of the amount of heat energy per area of material per degree difference between the outside and inside Insulation for the home has R-values usually in the range of R-10 up to R-30 The R-value is proportional to the thickness of the material For example, if you doubled the thickness, the R-value doubles The following table lists R-values for commonly-used construction materials at one-inch thickness: Material R-value Hardwood siding 0 91 Brick 1 00 Poured Concrete 0 08 EPS (1 5 lb density) 4 EPS (2 0 lb density) 4 2 Fiberglass batting 3 11 Cellulose fiber 3 70 Drywall 0 90
- A measure of a substance's resistance to heat flow The R-values of materials are added to produce the total R-value of a building surface The higher the R-value, the greater the resistance to heat flow
- Refers to the resistance a door has to thermal transfer or heat flow
- refers to insulation's resistance to heat flow, not to its thickness Tiny air pockets trapped in the insulating material resist the passage of heat preventing heat gain in the warm summer months, and heat loss in the colder fall and winter seasons The higher the insulation's R-Value, the greater its insulating power
- The measure of a materials resistance to heat flow The higher a materials R-value, the more it insulates For more information on R-Value, click on the term
- The resistance of insulation material (including windows) to heat passing through it The higher the number, the greater the insulating value
- A unit of thermal resistance used for comparing insulating properties of different materials The higher the R-value, the greater the material's insulating abilities Applies to roofing, insulation, windows etc
- a measure of resistance to heat flow through a unit width of material expressed in moC/W (hr ft2 oF/BTU in)
- Resistance to heat flow, a high R-value indicates that a window has good heat-insulating properties, whereas a low R-value indicates that a window has less heat-insulating value For more, see our HomeTips article, Understanding U-Factors & R-Values
- thermal resistance to the transfer or flow of heat Insulating material is rated by its ability to resist heat flow
- A measure of the ability of a material to insulate against heat loss The higher the R-value, the better the material is at insulating R-values are usually expressed in terms of a standard unit of thickness of the material For example, loose fiberglass insulation has an average R-value of 2 7 per inch, while rigid boards made of expanded polystyrene insulation have an R-value of 4 per inch
- R-value is a measurement of heat resistance It is the inverse of the U-value, so the higher the R-value the better the insulation resists heat transfer Many factors can affect the R-value of insulation, including the type of insulation, and the age of the insulation To determine the R-value of the insulation in your house, first determine the type of insulation present, whether that insulation is new, and measure the depth of the insulation in inches Look your insulation up on the table below, and multiply the R-value per inch by the number of inches present in your house
- resistance value, used specifically for materials used for insulating structures Three inches of fiberglass insulation has an R-value of 11
- A measure of a material's resistance to the flow of heat R-value is a laboratory measurement based on the constant temperatures on both sides of a material However, it does not reflect the fluctuating conditions that face the insulating materials in actual use, nor does it include the effect of thermal mass on energy efficiency
- quantitative measure of resistance to heat flow or conductivity, the reciprocal of U-factor The units for R-value are ft2 °F hr/Btu (English) or m2 °K hr/W (SI or metric) While many in the building community consider R-value to be the primary or paramount indicator of energy efficiency, it only deals conduction, one of three modes of heat flow, (the other two being convection and radiation) As an example of the context in to which R-value should be placed, 25% to 40% of a typical home's energy use can be attributed to air infiltration
- A unit of thermal resistance used for comparing insulating values of different material It is basically a measure of the effectiveness of insulation in stopping heat flow It is a measure of a material's resistance to heat flow in units of Fahrenheit degrees x hours x square feet per Btu The higher the R-value of a material, the greater its insulating capability
- a measure of the rate of resistance to heat loss or gain through a material; typically a wall or a roof The higher the R-value, the greater the material's resistance to heat flow and the better its insulating value
- A unit of thermal resistance used for comparing insulating values of different materials The higher the R-Value of a material, the greater its insulating properties and the slower the heat flows through it
- R-value is a measure of how well insulation will resist the flow of heat Higher R-values mean greater insulating ability, which means greater household energy savings and greater cost savings
- A measure of the resistance of a glazing material or fenestration assembly to heat flow It is the inverse of the U-factor (R = 1/U) and is expressed in units of hr-sq ft-°F/Btu A high-R-value window has a greater resistance to heat flow and a higher insulating value than one with a low R-value
- Shapley value
- A real number determined for the player i as
given a coalitional game with a set N of n players and a worth function v \; : \; \mathcal{P}(N) \; \to \Re .
- U-value
- thermal transmittance or thermal conductance
- Value at Risk
- A widely used measure of the risk of loss on a specific portfolio of financial assets. For a given portfolio, probability and time horizon, VaR is a threshold value such that the probability that the mark-to-market loss on the portfolio over the given time horizon exceeds this value (assuming normal markets and no trading) is the given probability level
- absolute value
- For a real number, its numerical value without regard to its sign; formally, -1 times the number if the number is negative, and the number unmodified if it is zero or positive
- absolute value
- For a complex number, the square root of the sum of the squares of its real and imaginary parts
- add value
- To make a product or service more desirable
The new Web site will really add value for our customers.
- aged R-value
- thermal resistance value established by utilizing artificial conditioning procedures for a prescribed period of time
- article of extraordinary value
- A transported item with a value exceeding 100 USD per imperial pound
- book value
- The value of an asset as reflected on an entity's accounting books, without accounting for appreciation or depreciation
- book value
- The price for which an item or service should be bought or sold, usually as related in a printed collection of prices for similar items or services
- call value
- The amount that must be paid by the issuer to a bondholder to call the bond before its maturity
The 2020s sell at 104, have a good yield, but are callable in 2010 with a call value of 103.
- call-by-value
- An evaluation strategy in which the arguments to a function are evaluated first, and the result is passed into the function
- calorific value
- The amount of heat produced by the complete combustion of a material or fuel. Measured in units of energy per amount of material. eg: Btu/m³
- calorific value
- The amount of energy available from an item of food when digested, mostly from carbohydrates and fats
- expected value
- Of a discrete random variable, the sum of the probability of each possible outcome of the experiment multiplied by the outcome value (or payoff)
- face value
- No more or less than what is stated; a literal or direct meaning or interpretation
Please take this comment at face value and don't try to read anything into it.
- face value
- The amount or value listed on a bill, note, stamp, etc.; the stated value or amount
- face-value
- Alternative spelling of face value
- fair market value
- The price at which the buyer and seller are willing to do business
- good value
- Funny; humorous
- good value
- Friendly; easy-going
- intermediate value theorem
- a statement that claims that for each value between the least upper bound and greatest lower bound of the image of a continuous function there is a corresponding point in its domain that the function maps to that value
- k-value
- thermal conductivity; the time of rate of heat flow through a unit area of a homogeneous material in a direction perpendicular to isothermal planes induced by a unit temperature gradient. In English (inch-pound) units of measurement; it is the number of BTUs that pass through a 1 inch thickness of a square foot sample of material in 1 hour with a temperature difference between the two sufraces of 1 degree F
- market value
- The price which a seller or insurer might reasonably expect to fetch for goods, services or securities on the open market
- mean value theorem
- a statement that claims that given an arc of a differentiable curve, there is at least one point on that arc at which the derivative of the curve is equal to the average derivative of the arc
- net present value
- The present value of a project or an investment decision determined by summing the discounted incoming and outgoing future cash flows resulting from the decision
- note value
- A musical notation that indicates the relative duration of a note, using the color or shape of the note head, the presence or absence of a stem, and the presence of flags
- par value
- The amount or value listed on a bill, note, stamp, etc.; the stated value or amount
- production value
- A method, material, or stagecraft skill used in the production of a motion picture or artistic performance; the technical quality of such a method, material, or skill
The New York publicity people asked the studio people if the films were to be shot in colour or not so as to decide if whether to feature that production value in the promotional campaigns.
- rateable value
- An official estimate of the value of a property used as a basis of local taxation
- replay value
- The entertainment value obtained by playing a computer game more than once; replayability
- rvalue
- Any value that is not an lvalue
- sentimental value
- The personal value of an object, derived from the personal memories associated with it
- singular value decomposition
- A particular type of factorisation of a matrix into a product of three matrices, of which the second is a diagonal matrix that has as the entries on its diagonal the singular values of the original matrix
- store of value
- An asset such as money or gold that is purchased or accepted as payment for goods and services for its ability to purchase other assets in the future without rapidly losing its purchasing power
- surplus value
- The part of the new value made by production that is taken by enterprises as generic gross profit
- tax value
- The services a tax payer receives in return for paying taxes to support school, municipal, county, state and federal budgets. Tax Value is stated in services per dollar
- truth value
- A value indicating to what extent a statement is true; in classical logic, these are the values "true" and "false"
- value
- The amount (of money or goods or services) that is considered to be a fair equivalent for something else
He tried to estimate the value of the produce at normal prices.
- value
- To estimate the cost of; judge the worth of something
I will have the family jewels valued by a professional.
- value
- To fix or determine the value of; assign a value to, as of jewelry or art work
- value
- The quality (positive or negative) that renders something desirable or valuable
The Shakespearean Shylock is of dubious value in the modern world.
- value
- To regard highly; think much of; place importance upon
Gold was valued highly among the Romans.
- value
- Numerical quantity measured or assigned or computed
The exact value of pi can never be computed.
- value
- The degree of importance you give to something
The value of my children's happiness is second only to that of my wife.
- value
- The relative duration of a musical note
The value of a crotchet is twice that of a quaver.
- value
- To hold dear
I value these old photographs.
- value
- The relative darkness or lightness of a color in (a specific area of) a painting etc
I establish the colors and principal values by organizing the painting into three values--dark, medium...and light. -Joe Hing Lowe.
- value added tax
- A tax levied on the added value that results from the exchange of goods and services
- value adds
- plural form of value add
- value bet
- To bet with the intention of being called in order to extract more money from a likely worse hand
- value bet
- A bet placed with the intention of being called in order to extract more money from a likely worse hand
- value bets
- plural form of value bet
- value bets
- Third-person singular simple present indicative form of value bet
- value betting
- Present participle of value bet
- value date
- Settlement date on which interest payments are credited or debited to the customer's bank account; interest payments are made from this date onwards
- value dates
- plural form of value date
- value domain
- The set of allowed values for a data element
- value judgement
- Alternative spelling of value judgment
- value judgment
- A judgment of the rightness or wrongness of something, based on a particular set of values or on a particular value system
- value over replacement player
- A statistical measure which evaluates the relative performance of a batter or pitcher compared to a hypothetical replacement player of average fielding skill and below average hitting or pitching
- value proposition
- The benefit (such as profit or convenience) offered by an organisation's product or service
- value propositions
- plural form of value proposition
- value raise
- A raise made with the intention of being called in order to extract more money from a likely worse hand
- value raise
- To raise with the intention of being called in order to extract more money from a likely worse hand
- value raised
- Simple past tense and past participle of value raise
- value raises
- plural form of value raise
- value raises
- Third-person singular simple present indicative form of value raise
- value raising
- Present participle of value raise
- value statement
- A non-descriptive statement
- value statement
- An organisation's statement of its ethical values, complementary to mission statement and vision statement
- value system
- A hierarchy of values that all moral agents possess, demonstrated by their choices. Most people's value systems differ, making the imposition of a singular value system by the state a source of constant social warfare. This is an individualistic concept. One's value system is molded by one's virtues or vices
- value system
- A person's standards and self-discipline set, based on the common sense and wisdom of knowing what the proper moral rules and discipline are, and the amount of willingness to see themselves and others abide by them
- value theory
- A theory of how people positively and negatively value things and concepts, the reasons they use in making their evaluations, and the scope of applications of legitimate evaluations across the social world
- value voter
- One who participates in elections and makes decisions based on issues such as religion, abortion, capital punishment and same-sex marriage
- value-add
- Something that adds value; a benefit or enhancement
- value-added network
- A communications network that had additional functions such as error correction, protocol conversion and message storing
- value-added reseller
- a company that adds some feature(s) to an existing product(s), then resells it (usually to end-users) as an integrated product or complete turn-key solution
- value
- (Reklam) "Value" has different interpretations: from a marketing or consumer perspective it is "the promise and delivery of an experience"; from a business perspective it is "the security of future earnings"; from a legal perspective it is "a separable piece of intellectual property." Brands offer customers a means to choose and enable recognition within cluttered markets
- non value-added
- (Ticaret) Activities and costs that can be eliminated without reducing performance, function or value as perceived by the customer
- value
- {v} to fix a price, rate, apprise, esteem
- value
- {n} a price, worth, rate, esteem
- fair market value
- (Ekonomi) Fair market value (FMV) is an estimate of the market value of a property, based on what a knowledgeable, willing, and unpressured buyer would probably pay to a knowledgeable, willing, and unpressured seller in the market. An estimate of fair market value may be founded either on precedent or extrapolation. Fair market value differs from the intrinsic value that an individual may place on the same asset based on their own preferences and circumstances
- surplus value
- (Ekonomi) (Economics - in Marxist theory) the excess of value produced by the labour of workers over the wages they are paid
- value-free
- Making or having no value judgments. "value-free distinctions", "value-free instruction"