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Inverted Bottom-Emission Organic Light Emitting Diode Using Two n-Doped Layers for the Enhanced Performance

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Chinese Physics Letters 2010年第11期27卷 181-184页

作者：程翠然陈玉焕秦大山全威刘金锁 Institute of Polymer science and engineering School of Chemical Engineering Hebei University of Technology Tianjin 300130

We fabricate an inverted bottom-emission organic light emitting diode （IBOLED） employing two n-doped layers, i.e., 5 nm lithium carbonate doped PTCDA （1：2 Li2CO3：PTCDA） with 5 nm Li2CO3 doped BCP （1：4 Li2CO3：BCP） on top, where PTCDA and BCP stand for 3, 4, 9, 10 perylenetetracarboxylic dianhydride and bathcuporine, respectively. Compared to the IBOED using a layer of 10 nm 1：4 Li2CO3：BCP, the one utilizing the two-layer combination of 5 nm 1：2 Li2CO3：PTCDA and 5 nm 1：4 Li2CO3：BCP shows decreasing operation voltage and thereby increasing power efficiency, mainly attributed to the higher electron conductivity of 1：2 Li2CO3：PTCDA than that of 1：4 Li2CO3：BCP. The mechanism of the electron transport through the interface of 1：2 Li2CO3：PTCDA and 1：4 Li2CO3：BCP is also discussed. We provide a simply and effective structure to enhance the current conduction for IBOLEDs.

关键词： Soft matter liquids and polymers Electronics and devices Surfaces interfaces and thin films Optics quantum optics and lasers Condensed matter: structural mechanical & thermal

Influence of iron on phase and magnetic property of the LaFe_(11.6)Si_(1.4) compound

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Journal of Rare Earths 2011年第4期29卷 354-358页

作者：陈湘陈云贵唐永柏 school of Materials science and engineering Sichuan University engineering and Technology College Neijiang Normal University

The phase relation, microstructure, Curie temperatures, hysteresis, and magnetocaloric effects of LaFex＊11.6Si1.4 （x=0.96, 0.98, 1.0, and 1.02） compounds prepared by arc-melting and then annealed at 1423 K （1.5 h）＋1523 K （4.5 h） were investigated. The main phase was NaZn13-type phase, the impurity phases included a small amount of α-Fe and LaFeSi phase in four samples. The crystal cell parameters of 1：13 phase increased from 1.1433（5） to 1.1454（4） nm with x increasing from 0.96 to 1.02, respectively. All samples kept the typical first-order magnetic transition. The increase of Fe strengthened IEM behavior, and led to the remarkable enhancement of MCE effect and negative slopes in Arrott plots around TC. The maximum ΔSM （T, H） under a low magnetic field （0–2 T） was 15.3, 16.8, 17.9, and 24.7 J/kg K with increasing of Fe content from x=0.96 to 1.02, respectively.

关键词： LaFex*11.6Si1.4 compounds short-time and high-temperature annealing hysteresis magnetocaloric effect rare earths

Preface:Innovative electrode materials for supercapacitors

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science China Materials 2018年第2期61卷 131-132页

作者： Hengxing Ji Hongxia Wang Department of Materials science and engineering University of Science and Technology of China school of Chemistry Physics and Mechanical Engineering Science and Engineering Faculty Queensland University of Technology

Portable electrical power sources play increasingly vital roles in our daily lives due to the widespread use of mobile electronic devices and electrical *** capacitors,also referred as supercapacitors(SCs)or ultracapacitors,are an important type of energy storage system with superior advantages of rapid power delivery and recharging compared to other types of energy storage *** practice,SCs have played im-

关键词： SC Preface:Innovative electrode materials for supercapacitors flexible

Nonlinearity-Compensation-Free Optical Frequency Domain Reflectometry Based on Electrically-Controlled Optical Frequency Sweep

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Journal of Electronic science and Technology 2021年第1期19卷 89-96页

作者： Fan Yang Ling-Jie Zhang Zhi-Yao Zhang Xiao-Jun Zhou Yong Liu the school of Optoelectronic science and engineering University of Electronic Science and Technology of ChinaChengdu 610054

A nonlinearity-compensation-free optical frequency domain reflectometry(OFDR)scheme is proposed and experimentally demonstrated based on the electrically-controlled optical frequency *** the proposed scheme,the linear frequency sweep light is generated by propagating an ultra-narrow-linewidth continuous-wave(CW)light through an electro-optic frequency shifter which consists of a dual-parallel Mach-Zehnder modulator(DPMZM)and an electronic 90°hybrid,where the electro-optic frequency shifter is driven by a linear frequency modulated signal generated by a direct digital synthesizer(DDS).Experimental results show that the spatial resolution and signal-to-noise ratio(SNR)of the proposed OFDR scheme without the nonlinear phase compensation are comparable to those of OFDR employing a commercial tunable laser source(TLS),an auxiliary interferometer,and a software-based nonlinear phase compensation *** proposed OFDR scheme is helpful to reduce the complexity of the optical structure and eliminate the difficulty of developing the nonlinear phase compensation algorithm.

关键词： Dual-parallel Mach-Zehnder modulator(DPMZM) electro-optic frequency shifter optical fiber sensor optical frequency domain reflectometry(OFDR)

Compressive deformation behavior of an indirect-extruded Mg-8Sn-1Al-1Zn alloy

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International Journal of Minerals,Metallurgy and Materials 2013年第1期20卷 49-56页

作者： Wei-li Cheng Zhong-ping Que Jin-shan Zhang Chun-xiang Xu Wei Liang Bong Sun You Sung Soo Park school of Materials science and engineering Taiyuan University of Technology Korea Institute of Materials science Ulsan National Institute of science and Technology

The medium and warm deformation behaviors of an indirect-extruded Mg-8Sn-IAI-IZn alloy were investigated by compression tests at temperatures between 298 and 523 K and strain rates of 0.001-10 s-1. It was found that the twinning-slip transition temperature was strain rate dependent, and all the true stress-true strain curves could be divided into two groups： concave and convex curves. Associated microstructural investigations indicated that the dynamic recrystallization （DRX） be- havior of the alloy varied with deformation conditions. At high strain rate and low temperature, dynamically recrystallized grains preferentially nucleated and developed in the twinned regions, indicating that twinning-induced DRX was dominant. While, at low strain rate, DRX developed extensively at grain boundaries and twins, and the process of twinning contributed to both oriented nucleation and selective growth. For the studied alloy, cracks mainly initiated from the shear band and twinning lamellar over the ranges of temperature and strain rate currently applied.

关键词： magnesium alloys compression testing dynamic recrystallization microstructure

Distribution of benthic macrofaunal communities in intertidal flat under hydrodynamic influence:a case study of Jiangsu coast,East China

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Journal of Oceanology and Limnology 2023年第3期41卷 1024-1038页

作者： Longhui ZHANG Dezhi CHEN Shu GAO Yaping WANG Benwei SHI Yongfen DU school of Geography and Ocean science Nanjing UniversityNanjing 210023China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China school of marine science and engineering Nanjing Normal UniversityNanjing 210046China

To identify the distribution pattern of macrofaunal assemblages of the Dafeng intertidal flats in response to hydrodynamic and sediment dynamic processes in the northern Jiangsu coast,East China,macrofauna sampling and hydrodynamic observations were carried out simultaneously across the mud flat,mixed mud-sand flat,and silt-sand flat of the intertidal zone in June *** show that there was a clear zonal distribution pattern of the macrofaunal communities,as is controlled by local hydrological and sedimentary *** component analysis(PCA)revealed three types of intertidal area in terms of hydrological and surficial sediment ***,three distinct groups of the macrofaunal communities,i.e.,mud flat,mix mud-sand,and silt-sand groups,were recognized at similarity level of 24%based on the CLUSTER analysis in similarity profile(SIMPROF)*** analysis upon best variables stepwise search(BVSTEP)indicated the importance of the hydrodynamics(e.g.,water temperature and salinity,tidal duration,flow speed,suspended sediment concentration,and wave height)in the differentiation of macrofaunal communities with different taxonomic classes over the intertidal ***,macrofaunal assemblages,similar to hydrology and surficial sediment,have a unique zonation ***-sized deposit feeders adapt better to low energy environments,thus dominated the upper part of the intertidal flat,whilst the heavy and large-sized filter feeders and deposit feeders were dominant over the middle and lower *** hydrodynamic and sediment processes cause biota-niche separation,which affected the biological processes across the intertidal flat.

关键词： macrofaunal communities hydrodynamic process inter-tidal ecosystem sedimentation tidal flat Jiangsu coast

Real-time all-frequency global llumination with radiance caching

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Computational Visual Media 2024年第5期10卷 923-936页

作者： Youxin Xing Gaole Pan Xiang Chen Ji Wu Lu Wang Beibei Wang school of Software Shandong UniversityJinan 250101China school of Computer science and engineering Nanjing University of Science and TechnologyNanjing 210094China

Global illumination(GI)plays a crucial role in rendering realistic results for virtual exhibitions,such as virtual car *** scenarios usually include all-frequency bidirectional reflectance distribution functions(BRDFs),although their geometries and light configurations may be *** allfrequency BRDFs in real time remains challenging due to the complex light *** approaches,including precomputed radiance transfer,light probes,and the most recent path-tracing-based approaches(ReSTIR PT),cannot satisfy both quality and performance requirements ***,we propose a practical hybrid global illumination approach that combines ray tracing and cached GI by caching the incoming radiance with *** approach can produce results close to those of ofline renderers at the cost of only approximately 17 ms at runtime and is robust over all-frequency *** approach is designed for applications involving static lighting and geometries,such as virtual exhibitions.

关键词： real-time global illumination all-frequency BRDFs Haar wavelets radiance caching

The Main Plasma Chemical Process of Nitric Oxide Production by Arc Discharge

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Plasma science and Technology 2011年第6期13卷 702-707页

作者：杨旗胡辉陈卫鹏许杰张锦丽吴双 school of Environment science and engineering Huazhong University of Science and Technology Department of Urban Constrution Huazhong University of Science and Technology Wuchang Branch school of Electrical and Electronic Huazhong University of Science and Technology

By adopting the optical multi-channel analyzer combined with fourier transform infrared （FTIR） spectrometer, the dominant free radicals and products generated by arc discharge were measured and studied, and the main plasma chemical reaction process in the nitric oxide production by arc discharge was identified. Plasma chemical kinetic curves of O, O2, N2, N and NO were simulated by using CHEMKIN and MATLAB. The results show that the main plasma chemical reaction process of nitric oxide production by arc discharge is a replacement reaction between O and N2, where NO can be generated instantaneously when discharging reaches stable.

关键词： arc discharge emission spectrum nitric oxide plasma chemistry

Detailed in-furnace measurements with reburning of superfine pulverized coal in high CO_(2)concentration

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Journal of Environmental sciences 2021年第6期33卷 326-334页

作者： Jun Shen Jiaxun Liu Shengxiang Deng Sha Wang Bin Chen Xiumin Jiang school of Mechanical and Automotive engineering Shanghai University of Engineering ScienceShanghai 201620China school of Mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China

This paper presents detailed measurements of gaseous species during the reburning process with high CO_(2)concentration in a bench-scale *** pulverized coal,with the average particle size below or around 20μm,is used as the reburning *** data of flue gas concentration(NOx,HCN,NH_(3),CH_(4),O_(2),CO,CO_(2)etc.)is obtained in order to reveal the intrinsic connection between NOx emissions and other influential gaseous species at different positions of the *** finding concludes that the advantage of superfine pulverized coal with regard to NO reduction is more efficient in homogeneous stage rather than heterogeneous ***,the evolution of HCN and CH_(4)agrees well with each stage of NO reduction,which indicates that these gaseous species are favorable for NO ***,oxygen consumption rate for superfine pulverized coal is relatively faster,conducive to strengthen both homogeneous and heterogeneous NO reduction under CO_(2)reburning condition.

关键词： NO reduction Superfine pulverized coal Coal combustion Reburning in CO_(2)