For the output regulation problem of slowly-varying linear systems via full information feedback, a sufficient condition of solvability is given.
对于经由全信息反馈的慢变线性系统的输出调节问题，我们给出了解决问题的一个充分条件。
This paper discusses the solvability of an elastic beam equation under asymptotic nonuniform nonresonance condition.
在弹性梁方程满足渐近非一致非共振条件时，讨论了方程解的存在性。
The inverse least square problem with spectral constraints is also studied and a sufficient condition is given for its solvability.
讨论了四元数量子力学中带有谱约束的最小二乘解反问题，得到了此问题有解的充分条件。
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