“fission”的概念、定义、翻译、参考文献-科学参考

fission

Physics

See nuclear fission.

Astronomy

A process in which a heavy atomic nucleus splits into smaller nuclei. The process is accompanied by the release of large amounts of energy. Fission may occur spontaneously or as the result of collision of neutrons with the nucleus.

Chemical Engineering

1. The division of a living cell into new cells as a mode of reproduction.

2. In a nuclear reaction, fission is the splitting of a heavy atomic nucleus spontaneously or as the result of an impact of another particle with the release of energy, and possibly causing a chain reaction within the mass of the element. Nuclear fission is the process used in nuclear reactors and atomic bombs. Fission products are nuclides that are produced by nuclear fission or the radioactive decay of nuclides by fission. Examples include krypton-85, strontium-90, and caesium-137.

Biology

A type of asexual reproduction occurring in some unicellular organisms, e.g. diatoms, protozoans, and bacteria, in which the parent cell divides to form two (binary fission) or more (multiple fission) similar daughter cells.

Logic

A binary connective $+$ acting as an intensional disjunction that is frequently encountered in relevant logics. In many relevant logics, fission is defined so that $φ + ψ =_{d f} \neg φ \to ψ$ (or equivalently, as $\neg ψ \to φ$ ). This definition leads to the interpretation of fission as a disjunction in which there is an implicit connection between the two disjuncts that licenses disjunctive syllogism. Proponents of relevant logics reject disjunctive syllogism, i.e., the inference
$\frac{φ \lor ψ \neg φ}{ψ}$
on the grounds that it is an essential component in proofs of the principle of explosion, i.e., that $φ, \neg φ ⊢ ψ$ in classical logic. (The possible irrelevance of the subject-matter of $ψ$ to that of $φ$ runs counter to the position of relevant logic.) But when there is a connection of relevance between $φ$ and $ψ$ , relevant logics often license the intensional disjunctive syllogism:
$\frac{φ + ψ \neg φ}{ψ}$
Fission is related to its dual fusion, itself interpreted as an intensional conjunction.

Geology and Earth Sciences

Splitting of a heavy atomic nucleus by collision, with the ejection of two or more neutrons, and the release of much energy.

单词	fission
释义	fission Physics See nuclear fission. Astronomy A process in which a heavy atomic nucleus splits into smaller nuclei. The process is accompanied by the release of large amounts of energy. Fission may occur spontaneously or as the result of collision of neutrons with the nucleus. Chemical Engineering 1. The division of a living cell into new cells as a mode of reproduction. 2. In a nuclear reaction, fission is the splitting of a heavy atomic nucleus spontaneously or as the result of an impact of another particle with the release of energy, and possibly causing a chain reaction within the mass of the element. Nuclear fission is the process used in nuclear reactors and atomic bombs. Fission products are nuclides that are produced by nuclear fission or the radioactive decay of nuclides by fission. Examples include krypton-85, strontium-90, and caesium-137. Biology A type of asexual reproduction occurring in some unicellular organisms, e.g. diatoms, protozoans, and bacteria, in which the parent cell divides to form two (binary fission) or more (multiple fission) similar daughter cells. Logic A binary connective $+$ acting as an intensional disjunction that is frequently encountered in relevant logics. In many relevant logics, fission is defined so that $φ + ψ =_{d f} \neg φ \to ψ$ (or equivalently, as $\neg ψ \to φ$ ). This definition leads to the interpretation of fission as a disjunction in which there is an implicit connection between the two disjuncts that licenses disjunctive syllogism. Proponents of relevant logics reject disjunctive syllogism, i.e., the inference $\frac{φ \lor ψ \neg φ}{ψ}$ on the grounds that it is an essential component in proofs of the principle of explosion, i.e., that $φ, \neg φ ⊢ ψ$ in classical logic. (The possible irrelevance of the subject-matter of $ψ$ to that of $φ$ runs counter to the position of relevant logic.) But when there is a connection of relevance between $φ$ and $ψ$ , relevant logics often license the intensional disjunctive syllogism: $\frac{φ + ψ \neg φ}{ψ}$ Fission is related to its dual fusion, itself interpreted as an intensional conjunction. Geology and Earth Sciences Splitting of a heavy atomic nucleus by collision, with the ejection of two or more neutrons, and the release of much energy.
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