Nano ceramic membrane with infrared spectrumselectivity of inorganic nano materials, which can effectively block infrared ray of sunshine, and shall not affect the phone signal strength.
The feature that structures have the selectivity to the earthquake motions frequency and structure response has the close corresponding relation with instantaneous energy spectrum is pointed out.
指出了结构对地震动的频率具有选择性，结构的响应与瞬时能量谱之间具有密切的对应关系。
3
The color surface has much more selectivity, while there isn't selectivity of visual spectrum for black and white surface color.