例句與造句

1. Of unknown regression coefficient ft under the linear restriction r = r and its convergence , that is : 2 . the optimalities of covariance - improved estimator sequence under three mde crlterions ; 3
   求出了在線性約束r = r下未知回歸系數_ 1的協(xié)方差改進估計序列，及此序列的收斂性： 2
2. Based on [ 4 ] , the author adds a linear restriction r = r to this sur system , and discusses the estimator and the optimalities of unknown regression coefficient ft in the sur system under the linear restriction
   本文將在文獻[ 4 ]的基礎上，對此sur系統(tǒng)增加一線性約束r = r ，討論在此線性約束r = r下半相依回歸系統(tǒng)中未知回歸系數_ 1的估計及其優(yōu)良性問題。
3. It's difficult to find linear restriction in a sentence. 用linear restriction造句挺難的