“Liu Huixian”的概念、定义、翻译、参考文献-科学参考

单词	Liu Huixian
释义	Liu Huixian Encyclopedia 工学〔著名土木工程人物〕释 Liu Huixian刘恢先（1912-10-18～1992-06-24）中国结构工程和地震工程学家。
随便看	Nonna Victorovna Mordyukova nonnegative non negative characteristic form non-negative characteristic form nonnegative characteristic form 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

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