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单词 parameter
释义
parameter
(once / 13192 pages)
1n 2n

A parameter is a limit. In mathematics a parameter is a constant in an equation, but parameter isn’t just for math anymore: now any system can have parameters that define its operation. You can set parameters for your class debate.
Parameter comes from a combination of the Greek word para-, meaning “beside,” and metron, meaning “measure.” The natural world sets certain parameters, like gravity and time. In court, the law defines the parameters of legal behavior. Parameter and perimeter are similar, but a perimeter is the physical distance around an object, while a parameter can contain or define something either physically or abstractly: before you marry, prepare for the parameters of monogamy.
CHOOSE YOUR WORDS
parameter / perimeter

Parameter is a limit that affects how something can be done, and perimeter is the outline of a physical area. Both words have special meanings in math, but they take off their pocket protectors and relax their definitions when they join the rest of us.

Parameter is the fancier math and science word. In mathematics, parameter is a measurable factor in a system. Outside of math, parameter is still a factor, property, or characteristic. It can also be a boundary or a limit. Here are some examples:

That makes it the heaviest observed elementary particle yet discovered, but within the parameters set by the Standard Model. (Scientific America)

"As hard as journalism is, at least you have parameters," she said. (New York Times)

Within those parameters, Ms. Gray played with color, creating an upbeat show reflecting London's mad, mad fashion world. (New York Times)

In mathematics, the perimeter is the boundary of a geometric figure. In mainstream language, it can be the limit of any physical area, often one protected by an armed force: secure the perimeter! Here are some examples from the news:

Police set up a perimeter around the house and blocked off Avery Street for safety reasons, Sgt. Scott Custer said. (Inquiring News)

Newest study finds fuel spill's perimeter expanding. (KOB-TV)

Some linguistic snobs don't like parameter's meaning of a boundary or limit when perimeter would do. But according to Garner's Modern American Usage, the use of parameter to mean boundary is "virtually universal" except by "die-hard snoots." Unless you are writing for such an audience (a math professor, perhaps), you can use parameter to mean boundary.

Just remember: The parameters of playing hide-and-seek are not peeking while you count, and to stay within the perimeter of the yard when you hide.

WORD FAMILY
parameter: parameters, parametric+/parametric: nonparametric
USAGE EXAMPLES
Much like the Balfour declaration, these parameters were in fact tailored point by point to Zionist desires.
The Guardian(Dec 31, 2016)
By changing parameters, varroa mites did become a significant factor.
New York Times(Dec 31, 2016)
“Testing at Hazen seeks to determine the ideal methodology for controlling particle size and other parameters affecting the bark-formation rate,” the agency said.
Seattle Times(Dec 30, 2016)
1
1n a constant in the equation of a curve that can be varied to yield a family of similar curves
Syn|Hypo|Hyper
parametric quantity
degree of freedom
one of the minimum number of parameters needed to describe the state of a physical system
constant, constant quantity, invariable
a quantity that does not vary
2n any factor that defines a system and determines (or limits) its performance
Hyper
factor
anything that contributes causally to a result
3n (computer science) a reference or value that is passed to a function, procedure, subroutine, command, or program
Syn|Hyper
argument
value
a numerical quantity measured or assigned or computed
address, computer address, reference
(computer science) the code that identifies where a piece of information is stored
2
n a quantity (such as the mean or variance) that characterizes a statistical population and that can be estimated by calculations from sample data
Hyper
quantity
the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable
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更新时间:2024/9/21 17:31:18