fundamental functional的用法和樣例：
例句
- A new density functional approach for calculations of large systems is presented.
提出一種新的對大體系進行分區密度泛函計算的方法。 - The convergence of the waveform relaxation for solving functional differential-algebraic equations is studied and the error estimate is derived.
摘要本文採用波形鬆弛演算法來求解一類泛函微分代數系統，該演算法在迭代過程中，避免了求解泛函微分方程，且利於并行處理。
