http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Fei-Fei Wang,Yan-Li Ma,Lan Xu,Ping Wang,Yan Zhang 한국섬유공학회 2018 Fibers and polymers Vol.19 No.11
This paper focuses on the semi-blunt puncture behavior of woven fabrics via finite element analysis (FEA) approaches. In these finite element (FE) models, main structure parameters, such as weave structure, warp density as well as friction coefficient, are systematically considered and calculated via FEA. These microstructure geometrical models are builtup with full consideration of interaction between warp and weft yarns. The theoretical results show that plain woven fabric has better puncture resistance compared with 2/1 twill and 5-harness satin fabrics. With the increase of warp density and friction coefficient, the puncture property of woven fabric will be dramatically improved. Finally, an energy consumption method is adopted to analyze the puncture damage process of woven fabric. The simulation results will benefit for the optimum design of woven fabric with excellent puncture performance.
Xu, Fei,Kim, Ji-Hoon,Kim, Hee Un,Jang, Jae-Ho,Yook, Kyoung Soo,Lee, Jun Yeob,Hwang, Do-Hoon American Chemical Society 2014 Macromolecules Vol.47 No.21
<P>A high-triplet-energy host polymer consisting of 9-(4-(bis(9-(2-ethylhexyl)-9<I>H</I>-carbazol-3-yl)methyl)phenyl)-9<I>H</I>-carbazole and tetraphenylsilane units was designed and synthesized. The triplet energy (2.67 eV) is one of the highest values reported for conjugated polymer hosts. Suitable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels of −5.61 and −2.24 eV, respectively, were also observed. Blue phosphorescent polymers were obtained by introducing bis[2-(4,6-difluorophenyl)pyridinato-<I>N</I>,<I>C</I><SUP>2</SUP>′]iridium(III) picolinate (FIrpic) into the host polymer while white phosphorescent polymers were synthesized by introducing red emissive bis[2-phenylquinoline-<I>N</I>,<I>C</I><SUP>2</SUP>′]iridium(III) picolinate ((Phq)<SUB>2</SUB>Irpic) into the blue phosphorescent one. Polymer light-emitting devices with the configuration ITO/PEDOT:PSS/PVK/EML/TSPO1/LiF/Al [ITO, indium tin oxide; PEDOT, poly(3,4-ethylenedioxythiophene); PSS, poly(styrenesulfonic acid); PVK, poly(<I>N</I>-vinylcarbazole); EML, the emitting layer was composed of polymer or polymer and 1,3-bis[5-(4-<I>tert</I>-butylphenyl)-1,3,4-oxadiazol-2-yl]benzene (OXD-7) in a doping ratio of 2:1); TSPO1, diphenylphosphine oxide-4-(triphenylsilyl)pheny] were subsequently fabricated. Efficient energy transfer from the host polymer to the blue and red iridium(III) complexes was observed owing to the high triplet energy of the host. One of the fabricated blue phosphorescent devices had a maximum luminous efficiency of 3.57 cd/A.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/mamobx/2014/mamobx.2014.47.issue-21/ma5015929/production/images/medium/ma-2014-015929_0010.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ma5015929'>ACS Electronic Supporting Info</A></P>
Fei Xu,Zhao Ming Wen,Li Yu Xiang The Microbiological Society of Korea 2006 The journal of microbiology Vol.44 No.5
A cDNA library of Ganoderma lucidum has been constructed using a Zap Express cloning vector. A glyceraldehyde-3-phosphate dehydrogenase gene (gpd) was isolated from this library by hybridization of the recombinant phage clones with a gpd-specific gene probe generated by PCR. By comparison of the cDNA and the genomic DNA sequences, it was found that the complete nucleotide sequence encodes a putative polypeptide chain of 338 amino acids interrupted by 6 introns. The predicted amino acid sequence of this gene shows a high degree of sequence similarity to the GPD proteins from yeast and filamentous fungi. The promoter region contains a CT-rich stretch, two CAAT boxes, and a consensus TATA box. The possibility of using the gpd promoter in the construction of new transformation vectors is discussed.
Xu, Fei,Mi, Dongbo,Bae, Hong Ryeol,Suh, Min Chul,Yoon, Ung Chan,Hwang, Do-Hoon Korean Chemical Society 2013 Bulletin of the Korean Chemical Society Vol.34 No.9
A series of fluorene-carbazole copolymers containing the pendant phosphor chromophore $Ir(absn)_2(acac)$ (absn: 2-(1-naphthyl)benzothiazole; acac: acetylacetone) were designed and synthesized via Yamamoto coupling. In the film state, these copolymers exhibited absorption and emission peaks at approximately 389 and 426 nm, respectively, which originated from the fluorene backbone. However, in electroluminescent (EL) devices, a significantly red-shifted emission at approximately 611 nm was observed, which was attributed to the pendant iridium(III) complex. Using these copolymers as a single emission layer, polymer light-emitting devices with ITO/PEDOT:PSS/polymer:DNTPD/TmPyPb/LiF/Al configurations exhibited a saturated red emission at 611 nm. The attached iridium(III) complex had a significant effect on the EL performance. A maximum luminous efficiency of 0.85 cd/A, maximum external quantum efficiency of 0.77, maximum power efficiency of 0.48 lm/W, and maximum luminance of 883 $cd/m^2$ were achieved from a device fabricated with the copolymer containing the iridium(III) complex in a 2% molar ratio.
Elastic Foundation Beam Solution of Tensile Flexible Retaining Wall
Xu Jianqiang,Xu Jiangbo,Yang Xiaohua,Yan Zhaobai,Li Haiping,Wang Huoming,Tan Ling,Fei Dongyang,Li Jianguo,Luo Yongzhen 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.2
The application of fl exible retaining walls in foundation pit engineering is gradually increasing. At present, many practical engineering problems need to be solved. This article takes a corrugated steel retaining wall with tensile reinforcement, for example, assuming that it is an elastic foundation beam model. A typical vertical thin layer unit is taken on the retaining wall for analysis. It uses the waveform integration method to calculate the moment of inertia, deriving the diff erential equation of fl exural deformation of corrugated steel retaining wall and establishing the theoretical formula for deformation of corrugated steel retaining wall under fi lling pressure behind the wall. Finally, a FLAC3D model was established to simulate the deformation of corrugated steel retaining walls in practical engineering, and the fi nal numerical simulation results were consistent with the theoretical formula. Thus, providing a theoretical basis for the deformation of such fl exible retaining structures.
A Distributed Decision-Making Mechanism forWireless P2P Networks
Xu Wu,Jingsha He,Fei Xu,Xi Zhang 한국통신학회 2009 Journal of communications and networks Vol.11 No.4
Trust-based solutions provide some form of payment to peers to encourage good behavior. The problem with trustmanagement systems is that they require prior knowledge to work. In other words, peers are vulnerable to attack if they do not have knowledge or correct knowledge of other peers in a trust management system. Therefore, considering only trust is inadequate when a decision is made to identify the best set of peers to utilize. In order to solve the problem, we propose a distributed decision-making mechanism for wireless peer-to-peer (P2P) networks based on game theory and relevant trust mechanisms in which we incorporate the element of trust and risk into a single model. The main idea of our mechanism is to use utility function to express the relationship between benefits and costs of peers, and then make the decision based on expected utility as well as risk attitude in a fully distributed fashion. The unique feature of our mechanism is that it not only helps a peer to select its partners, but also mitigates vulnerabilities in trust-based mechanisms. Through analysis and experiments, we believe our approach is useful for peers to make the decision regarding who to interact with. In addition, it is also a good starting point for exploring tradeoffs among risk, trust and utility.