Objective to report the methods and long term outcomes of multiple donor nerves transfer for the treatment of brachial plexus total roots avulsion.

目的探讨多组神经移位治疗臂丛神经根性撕脱伤的方法和疗效。

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We studied the asymptotic behavior of solutions to third order Poincaré difference equation whose characteristic equation has multiple roots.

研究了三阶Poincaré差分方程解的渐近性质。这种差分方程对应的常系数线性差分方程的特征方程有重根。

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