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A high precision temperature calculation method of fiber-optic distributed temperature sensing system based on iteration technique is introduced.Compared with the traditional calculation methods,this iteration-based method further corrects the attenuation coefficient difference of the Raman anti-stokes wavelength and stokes wavelength in optical fiber which is temperature-sensitive,thus increases the precision of temperature measurement.It especially works well with the measurements of normal-distance,complex temperature distribution fields.The iterative formula is established by theoretical analysis,the corresponding fiber parameters are pre-measured,by programming on data processing module of the sensing system.The result shows great accordance between calculation and actual temperature distribution within the range from 0 to 90℃ along a whole fiber of 5 km.

The carrier density mobility in organic electron transporting semiconductor is very low compared with the inorganic semiconductor,which affects the efficiency and luminance of Organic Light-emitting Devices(OLEDs).To improve the performance of OLED,the electron injecting and transporting ability should be enhanced,and n-type electrically doping can enhance the electron transporting ability of the orangic materials.Li3N was used as n-type dopant and Alq3∶Li3N doped layer was used as the electron injecting layer for OLED.As a result,the performance of OLED were improved.The optimal doping concentration and the thickness were 5% and 10 nm,respectively.Because Li3N is stable in the air and can decomposite to Li atoms and nitrogen at a low temperature and pressure,the disadvantage can be avoided of the effecting of moisture and oxygen to the metal dopant such as Li and Cs.The research result is also helpful to the preserve and doping process.