The necessary and sufficient conditions for the existence of admissible nonnegative definite quadratic estimates,biased and unbiased,are given.是什么意思_The necessary and sufficient conditions for the existence of admissible nonnegative definite quadratic estimates,biased and unbiased,are given.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句