“expansion”的概念、定义、翻译、参考文献-科学参考

expansion

Physics

The writing of a function or quantity as a series of terms. The series may be finite or infinite. See binomial theorem; multipole expansion; Taylor series.

Mathematics

A mathematical expression written as a sum of a number of terms, possibly infinitely many. Powers of multinomials can be expanded by multiplying out the brackets. Functions might also be be expressed as infinite power series. Decimal representations of numbers are often referred to as decimal expansions.

Chemical Engineering

An increase in the volume of a substance for a given mass. This may be due to a decrease in pressure or an increase in temperature of a gas, or due to a swelling effect of moisture in a porous material. When water cools, the density decreases until it reaches 4°C where it has a minimum volume and maximum density. Cooled further and turned to ice, its volume increases and density decreases to below that of liquid water, which is why ice floats and can lead to burst pipes in winter.

Electronics and Electrical Engineering

In a telephone or digital communications network, a network or circuit that has more outputs than inputs and thereby expands the incoming channels of the system to a larger number of output channels.

Logic

1. Refers to the inference rule of addition.
2. In belief revision, an operation on belief sets that adds a formula without correcting ensuing inconsistencies.

单词	expansion
释义	expansion Physics The writing of a function or quantity as a series of terms. The series may be finite or infinite. See binomial theorem; multipole expansion; Taylor series. Mathematics A mathematical expression written as a sum of a number of terms, possibly infinitely many. Powers of multinomials can be expanded by multiplying out the brackets. Functions might also be be expressed as infinite power series. Decimal representations of numbers are often referred to as decimal expansions. Chemical Engineering An increase in the volume of a substance for a given mass. This may be due to a decrease in pressure or an increase in temperature of a gas, or due to a swelling effect of moisture in a porous material. When water cools, the density decreases until it reaches 4°C where it has a minimum volume and maximum density. Cooled further and turned to ice, its volume increases and density decreases to below that of liquid water, which is why ice floats and can lead to burst pipes in winter. Electronics and Electrical Engineering In a telephone or digital communications network, a network or circuit that has more outputs than inputs and thereby expands the incoming channels of the system to a larger number of output channels. Logic 1. Refers to the inference rule of addition. 2. In belief revision, an operation on belief sets that adds a formula without correcting ensuing inconsistencies.
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