demand paged - ορισμός. Τι είναι το demand paged
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Τι (ποιος) είναι demand paged - ορισμός

DEMAND OF A CONSUMER OVER A BUNDLE OF GOODS THAT MINIMIZES THEIR EXPENDITURE WHILE DELIVERING A FIXED LEVEL OF UTILITY.
Compensated demand curve; Compensated Demand Curve; Hicksian demand; Hicksian demand curve; Compensated demand; Compensated demand function

demand paged      
Demand paging         
Page on demand
In computer operating systems, demand paging (as opposed to anticipatory paging) is a method of virtual memory management. In a system that uses demand paging, the operating system copies a disk page into physical memory only if an attempt is made to access it and that page is not already in memory (i.
demand paging         
Page on demand
<memory management> A kind of virtual memory where a page of memory will be paged in if an attempt is made to access it and it is not already present in main memory. This normally involves a memory management unit which looks up the virtual address in a page map to see if it is paged in. If it is not then the operating system will page it in, update the page map and restart the failed access. This implies that the processor must be able to recover from and restart a failed memory access or must be suspended while some other mechanism is used to perform the paging. Paging in a page may first require some other page to be moved from main memory to disk ("paged out") to make room. If this page has not been modified since it was paged in, it can simply be reused without writing it back to disk. This is determined from the "modified" or "dirty" flag bit in the page map. A replacement algorithm or policy is used to select the page to be paged out, often this is the {least recently used} (LRU) algorithm. Prepaging is generally more efficient than demand paging. (1998-04-24)

Βικιπαίδεια

Hicksian demand function

In microeconomics, a consumer's Hicksian demand function or compensated demand function for a good is his quantity demanded as part of the solution to minimizing his expenditure on all goods while delivering a fixed level of utility. Essentially, a Hicksian demand function shows how an economic agent would react to the change in the price of a good, if the agent's income was compensated to guarantee the agent the same utility previous to the change in the price of the good—the agent will remain on the same indifference curve before and after the change in the price of the good. The function is named after John Hicks.

Mathematically,

h ( p , u ¯ ) = arg min x i p i x i {\displaystyle h(p,{\bar {u}})=\arg \min _{x}\sum _{i}p_{i}x_{i}}
s u b j e c t   t o     u ( x ) u ¯ {\displaystyle {\rm {subject~to}}\ \ u(x)\geq {\bar {u}}} .

where h(p,u) is the Hicksian demand function, or commodity bundle demanded, at price vector p and utility level u ¯ {\displaystyle {\bar {u}}} . Here p is a vector of prices, and x is a vector of quantities demanded, so the sum of all pixi is total expenditure on all goods. (Note that if there is more than one vector of quantities that minimizes expenditure for the given utility, we have a Hicksian demand correspondence rather than a function.)

Hicksian demand functions are useful for isolating the effect of relative prices on quantities demanded of goods, in contrast to Marshallian demand functions, which combine that with the effect of the real income of the consumer being reduced by a price increase, as explained below.