As a fiber sensor, optical time domain L reflectometer becomes more and more popular to measure parameters, such as strain and temperature in structural health monitoring （SHM） simultaneously. Since the accuracy of...As a fiber sensor, optical time domain L reflectometer becomes more and more popular to measure parameters, such as strain and temperature in structural health monitoring （SHM） simultaneously. Since the accuracy of range resolution in optical time domain reflectometer （OTDR） is determined by the pulse width of laser, the range resolution in order of centimeter is achieved by employing of picoseconds lasers which are not commercial. In this paper, to achieve this accuracy with conventional OTDR, Fourier wavelet regularized deconvolution （ForWaRD） method is employed to deconvolve and denoise the detected signal simultaneously. Simulations show that this method improves resolution of conventional OTDR system to the order of several centimeters.展开更多
Controlling the orientation of the emissive dipole has led to a renaissance of organic light-emitting diode(OLED)research,with external quantum efficiencies(EQEs)of>30%being reported for phosphorescent emitters.The...Controlling the orientation of the emissive dipole has led to a renaissance of organic light-emitting diode(OLED)research,with external quantum efficiencies(EQEs)of>30%being reported for phosphorescent emitters.These highly efficient OLEDs are generally manufactured using evaporative methods and are comprised of small-molecule heteroleptic phosphorescent iridium(III)complexes blended with a host and additional layers to balance charge injection and transport.Large area OLEDs for lighting and display applications would benefit from low-cost solution processing,provided that high EQEs could be achieved.Here,we show that poly(dendrimer)s consisting of a non-conjugated polymer backbone with iridium(III)complexes forming the cores of firstgeneration dendrimer side chains can be co-deposited with a host by solution processing to give highly efficient devices.Simple bilayer devices comprising the emissive layer and an electron transport layer gave an EQE of>20%at luminances of up to≈300 cd/m^(2),showing that polymer engineering can enable alignment of the emissive dipole of solution-processed phosphorescent materials.展开更多
文摘As a fiber sensor, optical time domain L reflectometer becomes more and more popular to measure parameters, such as strain and temperature in structural health monitoring （SHM） simultaneously. Since the accuracy of range resolution in optical time domain reflectometer （OTDR） is determined by the pulse width of laser, the range resolution in order of centimeter is achieved by employing of picoseconds lasers which are not commercial. In this paper, to achieve this accuracy with conventional OTDR, Fourier wavelet regularized deconvolution （ForWaRD） method is employed to deconvolve and denoise the detected signal simultaneously. Simulations show that this method improves resolution of conventional OTDR system to the order of several centimeters.
基金P.L.B.is an ARC Laureate Fellow(FL160100067)E.B.N.is the recipient of a UQ Fellowship.P.E.S.is an Advance Queensland Research Fellow.F.M.was funded by a University of Queensland International Scholarship and E.V.P.is supported by the Australian Research Council(DP170102077)。
文摘Controlling the orientation of the emissive dipole has led to a renaissance of organic light-emitting diode(OLED)research,with external quantum efficiencies(EQEs)of>30%being reported for phosphorescent emitters.These highly efficient OLEDs are generally manufactured using evaporative methods and are comprised of small-molecule heteroleptic phosphorescent iridium(III)complexes blended with a host and additional layers to balance charge injection and transport.Large area OLEDs for lighting and display applications would benefit from low-cost solution processing,provided that high EQEs could be achieved.Here,we show that poly(dendrimer)s consisting of a non-conjugated polymer backbone with iridium(III)complexes forming the cores of firstgeneration dendrimer side chains can be co-deposited with a host by solution processing to give highly efficient devices.Simple bilayer devices comprising the emissive layer and an electron transport layer gave an EQE of>20%at luminances of up to≈300 cd/m^(2),showing that polymer engineering can enable alignment of the emissive dipole of solution-processed phosphorescent materials.
