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RISS 인기검색어
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- 저자 : Guifang Duan (검색결과 3 건)
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Solution processable small molecules for organic light-emitting diodes
Duan, Lian,Hou, Liudong,Lee, Tae-Woo,Qiao, Juan,Zhang, Deqiang,Dong, Guifang,Wang, Liduo,Qiu, Yong Royal Society of Chemistry 2010 Journal of materials chemistry Vol.20 No.31
<P>Organic light-emitting diodes (OLEDs) based on vacuum deposited small molecules have undergone significant progress since the first efficient double-layered OLEDs were reported in 1987 by Tang and Van Slyke. Recently, solution processed small molecular OLEDs are also drawing more and more research attention, as such a technology combines advantages of the facile synthesis of small molecules and the low-cost solution process like polymers. The performance of OLEDs made by solution process is gradually catching up with their vacuum deposited counterparts. This feature article will review the device structures adopted to achieve high performance solution processed OLEDs, the development of solution processable small molecules, and the comparisons of the different nature of the films and devices fabricated by solution-process or by vacuum deposition. Finally, the prospects and remaining problems will be discussed.</P> <P>Graphic Abstract</P><P>Recent developments, prospects and remaining problems of organic light-emitting diodes based on solution processable small molecules are reviewed, with comparisons of the films and devices by solution-process or vacuum deposition. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b926348a'> </P>
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Complex CAD surface shape design using semantic features
Fengbei Cheng,Zhenyu Liu,Guifang Duan,Chan Qiu,Bing Yi,Jianrong Tan 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.7
To a large extent, the success of the product shape design depends on whether the geometric modeling systems can satisfy more andmore complicated design demands in the engineering field. This paper proposes a shape design method based on semantic features forcomplex CAD surface. By the proposed method, we can easily meet the complicated design requirements, since the semantic can effectivelyrepresent the design intent. We discussed three aspects in shape design using semantic features, which are semantic design demandsof the target surface, geometric constraints in accordance with semantic features, and surface shape deformation under the geometricconstraints, respectively. The basic semantic features of geometric models drive the deformation of the target surface shape bychanging the related constraint, and the desirable features are added to the CAD surface shape. The examples of the car shape design arepresented to verify the effectives of our method.
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Zhenyu Liu,Chuang Wang,Guifang Duan,Jianrong Tan 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.9
A simple and effective approach based on refined plate theory (RPT) is proposed to study the static and free vibration characteristics of functionally graded CNTreinforced composite (FG-CNTRC) plates. Compared to traditional higher order shear deformation theories (HSDTs), the proposed method shows more efficient for FG-CNTRC plates analysis. To solve the C1-continuity requirement of the RPT, we used isogeometric analysis (IGA) to approximate the displacement field, which shows more advantages than the FEA, since it can construct higher-order elements without additional variables. This is an advantage for plate structural analysis because more variables make the calculation cumbersome. Finally, four types of FG-CNTRC plates were investigated and the results show the accuracy and efficiency of the proposed method.
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