分析了影响功率因数角的因素，研究了定角控制的基本原理，给出了定角控制方法的实现方案。

Elements that affect the output power factor Angle are analyzed, the basic principle of constant power factor Angle control is studied and its realization scheme is presented.

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所得结果表明，可以通过对激励的控制，实现阵列的宽角扫描能力，这对短波lpda相控阵的设计具有一定的指导意义。

The results obtained prove that wide Angle scanned arrays can be realized through controlling the excitations. And the results can be instructional on designing short wave phased LPDA arrays.

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结论：银杏叶胶囊可以改善原发性闭角青光眼手术后眼压控制患者的视野，表明其具有一定的视神经保护作用。

Objective:To evaluate the neuroprotection effect of Ginkgo leaf capsules on primary angle closure glaucoma patients after surgical therapy whose intraocular pressure were controlled.

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