delay differential equations的用法和樣例：
例句
- The investigation of the existence of positive solutions of neutral delay differential equations with impulses is devoted by using the Banach cotraction principle.
摘要利用壓縮映射原理，討論了中立型脈衝時滯微分方程正解的存在性。 - The asymptotic behavior of solutions for a class of delay differential systems was studied.
摘要研究了一類時滯微分系統解的漸近性態。
