With this kind of nail, humeral shaft fractures were fixed by inserting needles through the upper point of olecranon fossa and made clinical evaluation on its effects.
临床采用该钉由鹰嘴窝上方逆行进钉内固定治疗肱骨干骨折，并对其进行评价。
Some efficient tools such as topological degree theory, fixed point theory and lower and upper method have been applied.
使用的主要方法有锥上的不动点理论、拓扑度理论和上下解方法等。
By means of lower-upper solutions methods, theory of fixed point indices and local bifurcation theory, the conditions for multiplicity and uniqueness positive solutions of this system was obtained.
运用上下解方法，不动点指数理论，局部分歧理论，得出了该系统存在多个正解或惟一正解的条件，即参数对解的个数有一定影响。
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