Chen W.-C.,Quanzhou Normal University
Jilin Daxue Xuebao (Diqiu Kexue Ban)/Journal of Jilin University (Earth Science Edition) | Year: 2012
Based on the methodology analysis of integrated model of information prediction and evaluation of mineralization prospect, the comprehensive evaluation model of mineralization prospect of linear weighting method and weighted Minkowski distance method are derived based on the assign a value to two states and factor analysis by improving quantity of information method. The quantity of information method was expanded into the construction of geological variable, screening, assignment, which is the base for the spatial analysis and modeling of MapGIS served for evaluation of mineralization prospect with quantitative prediction and evaluation. The spatial analysis model of MapGIS for evaluation of mineralization prospect with quantitative prediction and evaluation was constructed based on the existence of variable and assignment by applying the mixed spatial analysis model. Take iron, copper, lead-zinc ore prospect evaluation in the map of Changkeng in Wuyishan metallogenic belt of scale 1:50000 as example. The model was applied for quantitative prediction and evaluation. 12 metallogenic prospect areas with iron, copper, lead-zinc ore have been delineated, including 3 areas of class A, 3 of class B and 6 of class C.
Yu Y.,Quanzhou Normal University |
Yu Y.,University of Dayton |
Zhan Q.,University of Dayton
Optics Express | Year: 2015
A simple and flexible method is presented for the generation of optical focal field with prescribed characteristics. By reversing the field pattern radiated from a uniform line source, for which the electric current is constant along its extent, situated at the focus of a 4Pi focusing system formed by two confocal high-NA objective lenses, the required illumination distribution at the pupil plane for creating optical focal field with desired properties can be obtained. Numerical example shows that an arbitrary length optical needle with extremely high longitudinal polarization purity and consistent transverse size of ∼0.36λ over the entire depth of focus (DOF) can be created with this method. Coaxially double-focus with spot size of ∼0.36λ in the transversal direction and ∼λ in the axial direction separated by a prescribed spacing is illustrated as another example. The length of optical needle field and the interval between double-focus are determined by the length of uniform line source. These engineered focal fields may found potential applications in particle acceleration, optical microscopy, optical trapping and manipulations. © 2015 OSA.
Wu Q.-H.,Quanzhou Normal University
Critical Reviews in Solid State and Materials Sciences | Year: 2013
The oxide/organic interfaces play crucial roles in the hole injection from the anode electrodes to the emitting organics in organic light-emitting diodes (OLEDs), and hence have strong impacts on the efficiencies and other properties of the devices. Indium-tin oxide (ITO) is currently the most popular anode material used in OLEDs due to several merits, such as good etch ability, good adherence, high transparency, low resistivity, and high work function. Interfacial engineering between the ITO electrode and the overlying organic layers is an important process to obtain the high performance of the diode devices. In this article, recent progress in modification of the ITO/organic interfaces is reviewed, as these interfaces are important to the development of the technologies aiming at improving the electroluminescence, and efficiencies as well as reducing the operation voltages of OLEDs. ITO/Organic interfacial properties can be controlled or modified by simply changing the surface properties of ITO using chemical or physical treatments, and by adding a buffer layer (e.g., metal, oxide, or organic thin films) between the ITO and hole transport or emitting organic layers. The literature data showed that the electroluminescence, efficiencies, and lifetimes of the OLEDs could be greatly increased and the operation voltage considerably decreased when the ITO/organic interfaces have been properly improved. © 2013 Taylor and Francis Group, LLC.
Yang H.,Quanzhou Normal University
Guangxue Xuebao/Acta Optica Sinica | Year: 2013
White organic light-emitting device (WOLED) based on fluorescent sub-monolayer combining with phosphorescent doping layer is fabricated, in which fluorescent material 4, 4'-bis(2, 2'-diphenyl vinyl)-1, 1'-biphenyl (DPVBi) acts as blue emitter layer, sub-monolayer [2-methyl-6- [2-(2, 3, 6, 7-tetrahydro-1H, 5H-benzo[ij] quinolizin-9-yl) ethenyl]-4H-pyran-4-ylidene] propane-dinitrile (DCM2) inserted in the blue emitter layer acts as red emitter layer, fac tris (2-phenylpyridine) iridium [Ir(ppy)3] doped into 4, 4'-N, N'-dicarbazole-biphenyl(CBP) host acts as green emitter layer, respectively. The structure of device is ITO / NPB(40 nm )/DPVBi (8 nm) /DCM2(d)/CBP:Ir(ppy)3 8% (15 nm)/4, 7 -diphenyl-1, 10-phenanthroline (BPhen) (60 nm)/LiF (1 nm)/Al (200 nm). The device performance is controlled by varying the thickness of DCM2. The maximum current efficiency and maximum luminance of the device with the DCM2 thickness of 0.05 nm DCM2 are 7.60 cd/A, 15 420 cd/m2, respectively. The commission international eclairage (CIE) color coordinates of the device vary from (0.34, 0.44) at 4 V to (0.27, 0.33) at 12 V. In order to further improve the performance of WOLED, the BPhen is used as exciton block-layer to the WOLED, the maximum current efficiency and maximum luminance of the device with BPhen thickness of 5 nm are 10.56 cd/A at 4 V, 25960 cd/m2 at 13 V, respectively. The CIE color coordinates of the device vary from (0.34, 0.44) at 4 V to (0.28, 0.36) at 12 V that are general within the white region. The results show that, compared with that of without exciton block- layer, the devices employing exciton block-layer yield higher device performance as well as comparatively stable electroluminescence spectra and CIE color coordinates results stable white emission.
Danlin C.,Quanzhou Normal University
International Journal of Digital Content Technology and its Applications | Year: 2011
Zigbee ensures the interoperability of the wireless devices in the low-cost, low power consumption and low data rate network.This paper presents a universal application-based three-layer logic model general which has a good implementation and scalability; and gives some key issues and their resolutions appeared in the processes of system design and development, providing certain reference value to the development and application of similar projects.