Preconditioned con- jugate gradient algorithm is a fast and accurate computational algorithm.

预条件共轭梯度法是一种精确并且收敛迅速的计算方法。

Conclusion A Salmonella paratyphi A con- jugate vaccine preparation procedure was successfully constructed.

结论成功建立了甲型副伤寒结合疫苗的制备工艺；