Recent researches focus on constant time delay system, seldom on variable time delay case.

对时延稳定性的分析集中在定常时延, 很少述及时变时延的情况.

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The results obtained shows the intrinsic difference type hyperbolic equations with variable time - lag from hyperbolic equations.

这些结果充分揭示了此类方程与双曲型方程存在质的差异.

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Chapter 3 introduces the variable time - step scheme in combination with solution - mesh refinement on unstructured tetrahedral mesh.

第三章介绍结合变时 步法 之非结构性可调适四面体网格.

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