Dual-comb spectroscopy performed in the mid-infrared—where molecules have their strongest rotovibrational absorption lines—offers the promise of high spectral resolution broadband spectroscopy ...

此外，Comb-DAS可在具有更低布里渊阈值的长光纤中实现更高的功率传输，使其最大传感距离从43公里扩展延长到72公里，延长1.6倍以上，且不需要任何如分布式光放大等额外的辅助手段。 图4 (A)传感信号时域对比图。 (B)传感信号频域瀑布图。 (C)传感信号PSD谱对比图。

Fig. 2. Photoacoustic spectrum of a mixture of 12CH4 and 14CH4 in nitrogen. The light source used in the measurement was a high-power infrared optical frequency comb. The absorption lines of 14CH4 are ...

Hair fall is one of the most common concerns today, affecting both men and women. While shampoos, oils, and supplements often ...

Use the right comb; this is the first step. To detangle your hair, always use a wide-toothed comb that is made of wood or neem. In ancient times, neem combs were made and used by people; it was ...

The comb-crested jacana is a highly distinctive native waterbird, with a bright red comb on the top of its head. (Supplied: Sally Corte) Mr Dooley said the males were hard-working stay-at-home dads.

“Annie Malone really pioneered the use of the pressing comb in the States,” says Sandra Gittens, an educator and author who specialises in hair history, “and hot pressing arrived around the 1940s in ...