The physical mechanism about reflection of low-emission glass in near-infrared region is explained by using plasma cut-off frequencytheory.
利用等离子体截止波长理论，解释了低辐射玻璃红外反射的物理机制。
2
The frequencytheory of law strain dynamic pipe measurement is sketched. The frequency formula is deduced out. The relationship between exciting material, frequency and length of piles is reached.
简述了低应变动测桩的频率理论，推导出了频率公式，得出了激励材质与频率、所测桩长之间的关系。
3
Ackermann suspects that this may be because the right brain is specialized for processing low-frequency information, which is typical of speech, but this theory is still unproved.