Autor: He, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Quartz enhanced photoacoustic spectroscopy based on an external cavity quantum cascade laser
Autorzy:: Xu, L.
Zhou, S.
He, T.
Li, J.
Powiązania:: https://bibliotekanauki.pl/articles/173669.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: external cavity quantum cascade laser
ECQCL
quartz enhanced photoacoustic spectroscopy
QEPAS
volatile organic compound
VOC
ethanol
Opis:: Mid-infrared laser spectroscopy is a powerful analytical tool for trace gases detection. In this study, a spectroscopic system based on an external cavity quantum cascade laser (ECQCL) and quartz enhanced photoacoustic spectroscopy (QEPAS) was developed for volatile organic compounds (VOCs) measurements. Primary laboratory test on ethanol spectroscopy was investigated and compared with traditional direct absorption spectroscopy (DAS). Experimental results show that the proposed QEPAS is more sensitive than the conventional DAS method. In addition, the significant linear dependence of photoacoustic signal on sample pressures and laser operating parameters was observed.
Źródło:: Optica Applicata; 2018, 48, 4; 687-695
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Fiber-optic accelerometer based on a modal interferometer using a thin-core fiber
Autorzy:: Wang, X
Wu, X
Li, S
Ge, Q
He, T
Yu, B
Powiązania:: https://bibliotekanauki.pl/articles/174927.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: fiber-optic accelerometer
modal interferometer
thin-core fiber
Opis:: A compact fiber-optic accelerometer based on a modal interferometer, which is fabricated by misaligned splicing of a short section of a thin-core fiber between two sections of a standard single-mode fiber, is demonstrated experimentally. A spectrum analysis method is used to detect an acceleration signal rapidly. The experimental results show that the thin-core fiber-based fiber-optic accelerometer has a minimum detectable acceleration of 3.3×10–3g (g – gravitational acceleration), and a wide frequency response range from 10 to 1200 Hz. Moreover, the proposed accelerometer exhibits the advantages of low cost, simple structure and easy fabrication.
Źródło:: Optica Applicata; 2015, 45, 3; 317-325
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Investigation of HFC-134a decomposition by combustion and its kinetic characteristics in a laboratory scale reactor
Autorzy:: Mi, T.
Han, J.
He, X.
Qin, L.
Powiązania:: https://bibliotekanauki.pl/articles/207909.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: thermal decomposition
hydrochlorofluorocarbons
HFC
combustion
R134a
rozkład termiczny
hydrofluorokarbony
freony
spalanie
Opis:: Thermal decomposition of HFC-134a at 900–1000 K was investigated using a laboratory scale reactor. The experimental results indicate that the lower initial HFC-134a concentration and higher reaction temperature could enhance HFC-134a decomposition efficiency. Based on the results of measurements, it seems that the reaction order is around 1. Its activation energy (Ea) and the frequency factor (A) in the investigated temperature range are 300.5 kJ·mol–1 and 2.96×1014, respectively. The results demonstrate that 99.9% destruction efficiency could be achieved when HFC-134a/LPG is below 0.5 and the excess air ratio – above 0.6.
Źródło:: Environment Protection Engineering; 2015, 41, 4; 143-150
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

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