“地下空间防灾”的概念、定义、翻译、参考文献-科学参考

单词	地下空间防灾
释义	地下空间防灾 Encyclopedia 工学人防工程释 disaster prevention of underground space地下空间防灾为抵御或减轻地下空间内部和外部各种自然与人为灾害及由各种灾害引发的次生灾害而采取的各种预防措施。
随便看	nonnegative combination nonnegative definite nonnegative definite kernel nonnegative definite matrix nonnegative definiteness nonnegative definite quadratic estimate non-negative definite quadratic estimator nonnegative divisor nonnegative element nonnegative function nonnegative integer nonnegative integral kernel nonnegative manifold nonnegative matrix non-negative matrix factorization nonnegative measure nonnegative number nonnegative operator nonnegative orthant nonnegative partial sum nonnegative quadratic form nonnegative semi-definite matrix nonnegative solution nonnegative splitting nonnegativity

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