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The Design and Realization of a Popular Science Long Corridor Based on 3D Stereo Technology
Aiying Mao,Pengxiang Gao,Airu Mao,Yuanyuan Song,Jinxia Yu 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.6
Through the design and technical realization of a popular science long corridor based on 3D stereo technology, three hot applications of 3D technology including 3D folding technology, 3D holographic imaging technology and 3D printing technology were introduced in the paper. The three techniques as a whole in the popular science long corridor display the method to decrease the realization cost of the popular science long corridor. The interactive part of the two-dimensional animation was added into the popular science long corridor to reflect truly the effect of the computer technology integrating application.
Li, Xiaowei,Wang, Aiying,Lee, Kwang-Ryeol Royal Society of Chemistry 2019 Physical chemistry chemical physics Vol.21 No.5
<P>The transformation of amorphous carbon to graphene on different Ni surfaces during rapid thermal processing was explored using reactive molecular dynamics simulation. Due to the difference in activation energy, Ni surfaces affected the diffusion behavior of C into Ni and thus modulated the remnant number of C atoms, dominating the formation and quality of graphene, which accorded with the developed empirical equation.</P>
Li, Xiaowei,Wang, Zhenyu,Li, Hanchao,Wang, Aiying,Lee, Kwang-Ryeol American Chemical Society 2019 The Journal of Physical Chemistry Part C Vol.123 No.45
<P>Fast transfer-free synthesis of graphene on a given dielectric substrate is achieved by Ni-catalyzed solid-state transformation of amorphous carbon (a-C) through rapid thermal processing (RTP). Nevertheless, the dependence of this transformation behavior on Ni/a-C thickness and the underlying mechanism at the atomic scale are not well comprehended, leading to the lack of efficient synthesis and modulation of the graphene structure experimentally. Here, using reactive molecular dynamics simulation, we select Ni as a catalyst and present a systematic investigation of the diffusion of C into Ni and the corresponding structural transformation of a-C into graphene under different conditions. The results emphasize the decisive role of the Ni/C atomic ratio in the quality and layer number of graphene instead of the Ni or a-C thickness. Combined with the results during the cooling process, they suggest that the a-C-to-graphene transformation mechanism is mainly dependent on the diffusion behavior of C and the catalytic effect of Ni, rather than the dissolution/precipitation. Most importantly, both the simulation and experiment propose a universal equation to elucidate the relationship between the number of C and Ni atoms and the RTP graphene structure. This finding not only enables the fast synthesis and modulation of a-C-transformed graphene with the desired structure and layers on various substrates without the transfer process but also gets rid of the limitation of carbon sources and Ni structures and simplifies the RTP process parameters significantly, which can be utilized widely in experiment to promote the commercial application of graphene.</P> [FIG OMISSION]</BR>
Yuanyuan Qin,Yifei Wang,Jin Liu,Fengfeng Chen,Aiying Yao,Zhanchun Chen,Fu Junyu 한국고분자학회 2022 Macromolecular Research Vol.30 No.12
The mechanical properties of functionalized graphene/polyethylene (f- GRA/PE) composites and graphene/polyethylene (GRA/PE) composites were studied based on the crystallized models with the molecular dynamics simulation in this paper. The effects of GRA and f-GRA with different mass fractions on the mechanical properties of polyethylene were considered. The results showed that the adsorption capacity of polyethylene molecular chains of f-GRA is stronger, the compatibility of f-GRA/PE system is higher with decreasing the interface distance, and the dynamic property of molecular chain is weaker with reducing the radius of gyration of f-GRA/ PE. Furthermore, the reduction of mechanical energy consumption results in the increase of wear resistance of the system, which is more obvious when the mass fraction of f-GRA increases. Finally, the influence of different tensile rates on the composite system was studied. It was found that during the tensile process, the ability of the composite material to resist deformation in the stretching direction is enhanced, and the functionalized graphene inhibits the movement of the molecular chain due to the adsorption force, which improves the yield stress of the f-GRA/PE composite material, thereby increasing the tensile strength. Tensile rate has a certain effect on mechanical properties, and elastic modulus and yield stress increase with the increase of strain rate.
Liancai Wang,Yingfeng Wu,Liang Chen,Yongquan Gu,Tingfei Xi,Aiying Zhang,Zeng-guo Feng 한국물리학회 2005 Current Applied Physics Vol.5 No.5
As initial step for developing tissue-engineered vascular autografts, a novel series of biodegradable aliphaticaromatic copoly-esters were synthesized and tubular scaolds were fabricated. Cytotoxicity, adhesion and growth of dierent kinds of cells on thepolyester lms and in vivo biocompatibility have been evaluated. The results indicate that these copolyesters possess good biocom-patibility. Canine bone marrow cells were seeded on the scaolds and cultured in a bioreactor for 3 days. A conuent, adherentmonolayer bone marrow cells was observed in the scaold lumen. All the testing results suggest that these copolyesters might ulti-mately nd applications for vascular tissue engineering..
Zhou, Yong,Guo, Peng,Sun, Lili,Liu, Linlin,Xu, Xiaowei,Li, Wenxian,Li, Xiaowei,Lee, Kwang-Ryeol,Wang, Aiying Elsevier Sequoia 2019 Surface & coatings technology Vol.361 No.-
<P><B>Abstract</B></P> <P>Diamond-like carbon (DLC) films with weak carbide metal Al and carbide metal Ti co-doping (Al/Ti-DLC) were prepared by a hybrid ion beam deposition system. The atomic ratios of doped Al to Ti were tailored via designing the special Al/Ti combined sputtering target. The composition, microstructure, roughness, residual stress, hardness, toughness, and tribological behaviors of the deposited films were systematically evaluated to explore the dependence of structural properties on Al/Ti ratios. Results indicated that the high-throughput preparation of DLC films with different Al/Ti atomic ratios was achieved by tailoring the sputtering target and process parameters without the difference in both the film thickness and total Al/Ti content. With the Al/Ti ratios in the films decreased from 8.8 to 3.0, the residual stress, hardness, and toughness of Al/Ti-DLC films increased obviously, originating from the increased fraction of titanium carbide and the reduced Al content. However, the coefficient of friction and wear rate with decreasing the Al/Ti ratio were obviously improved, which was related with the transformation of underlying friction mechanism from the sliding interface graphitization to dangling bond-passivation. The present results not only suggest a high-throughput method to fabricate co-doped DLC films, but also promote the scientific understanding and engineering application of DLC films with high performance.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ti/Al co-doped diamond-like carbon films were fabricated by a hybrid ion beam method. </LI> <LI> Different Al/Ti ratios were successfully achieved at one time using designed target. </LI> <LI> Al/Ti ratios had no effect on the chemical state of co-doped Ti and Al atoms. </LI> <LI> The mechanical and tribological properties were strongly dependent on Ti/Al ratios. </LI> <LI> Different friction mechanisms were observed with Al/Ti ratios ranged from 8.8 to 3.0. </LI> </UL> </P>
Change Detection in Bitemporal Remote Sensing Images by using Feature Fusion and Fuzzy C-Means
( Xin Wang ),( Jing Huang ),( Yanli Chu ),( Aiye Shi ),( Lizhong Xu ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.4
Change detection of remote sensing images is a profound challenge in the field of remote sensing image analysis. This paper proposes a novel change detection method for bitemporal remote sensing images based on feature fusion and fuzzy c-means (FCM). Different from the state-of-the-art methods that mainly utilize a single image feature for difference image construction, the proposed method investigates the fusion of multiple image features for the task. The subsequent problem is regarded as the difference image classification problem, where a modified fuzzy c-means approach is proposed to analyze the difference image. The proposed method has been validated on real bitemporal remote sensing data sets. Experimental results confirmed the effectiveness of the proposed method.