人工晶状体(intraocular lens，IOL)在眼内位置的变化将会对屈光状态及眼内像差尤其是高阶像差及成像质量产生影响。IOL在眼内的稳定......

We demonstrate a switchable Q-switched and mode-locked erbium-doped fiber laser (EDFL) operating in the L-band region us......

The effect of ultrasonic surface rolling process(USRP)as a severe plastic deformation technology was investigated on the......

该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生......

This paper expounded in detail the principle of energy spectrum analysis based on discrete wavelet transformation and mu......