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136 results on '"Dai, GuiPing"'

7. Controller-Based Management of Connected Vehicles in the Urban Expressway Merging Zone

Author

Zhu, Chaolei, Chen, Yangzhou, Dai, Guiping, Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio, Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Advisory editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, Balas, Valentina Emilia, editor, Jain, Lakhmi C., editor, and Zhao, Xiangmo, editor

Published
2017
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10. Effects of H2O on Improving the Performance of a Solid Composite Electrolyte Fabricated via an Air-Processable Technique

Author

Fan, Xine, Zhou, Yanmin, Wang, Mingda, Lai, Junbao, Shan, Wenzhe, Xing, Zhen, Tang, Hao, Dai, Guiping, Zhang, Gaixia, and Tan, Long

Abstract

Inert atmosphere is normally necessary for fabrication of solid composite electrolytes (SCEs) as a crucial part of solid-state Li-metal batteries in order to avoid undesirable reactions induced by ambient moisture. Herein, we developed an air-processable technique to fabricate SCEs by employing LiCF3SO3(LiOTf) as the Li salt, which was combined with Li6.4La3Zr1.4Ta0.6O12(LLZTO) as the fast Li-conductor and polyvinylidene difluoroethylene/polyvinyl acetate (PVDF/PVAC) as the polymer matrix. With the assistance of trace H2O dissolved in electrolyte solution, the room-temperature Li+conductivity of the obtained aSCE reached as high as 5.09 × 10–4S cm–1, which was over 3 orders of magnitude higher than that of the one (iSCE, 1.93 × 10–7S cm–1) cast by the electrolyte solution prepared in an inert atmosphere. The theoretical calculation results reveal that the oxygen atom of H2O exhibits a high propensity to interact with the Li atom in LiOTf (Li···O), thereby establishing a hydrogen bond with the oxygen atom (H···O) in N,N-dimethylformamide (solvent). Such interactions promoted the dissociation of LiOTf and led to the formation of uniform Li+transportation channels. Simultaneously, the composition distribution was also altered, resulting in a smoother surface of aSCE and lowered crystallinity of PVDF. On this basis, the LiOTf/LLZTO/PVDF/PVAC solution at 60 °C was directly coated onto the surface of the LiFePO4(LFP) cathode to fabricate the LFP-aSCE film after drying in an oven. The assembled LFP-aSCE/Li battery wetted by trace sulfolane exhibited an initial Coulombic efficiency of 94.7% and a capacity retention rate of up to 96% at 0.2 C (137 mAh g–1) after 180 cycles and a high capacity of 143.7 mAh g–1at 0.5 C (150 cycles). Overall, this work could pave the way for the facile fabrication of solid electrolytes.

Published
2024
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23. Palmprint Recognition Using 2D-Gabor Wavelet Based Sparse Coding and RBPNN Classifier

Author

Shang, Li, Huai, Wenjun, Dai, Guiping, Chen, Jie, Du, Jixiang, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zhang, Liqing, editor, Lu, Bao-Liang, editor, and Kwok, James, editor

Published
2010
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24. Current Perception Threshold Measurement via Single Channel Electroencephalogram Based on Confidence Algorithm

Author

Wang, You, Qiu, Yi, Miao, Yuping, Dai, Guiping, Li, Guang, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zhang, Liqing, editor, Lu, Bao-Liang, editor, and Kwok, James, editor

Published
2010
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25. Study on Fault Diagnosis of Rolling Mill Main Transmission System Based on EMD-AR Model and Correlation Dimension

Author

Dai, Guiping, Wu, Manhua, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Goebel, Randy, editor, Siekmann, Jörg, editor, Wahlster, Wolfgang, editor, Huang, De-Shuang, editor, Jo, Kang-Hyun, editor, Lee, Hong-Hee, editor, Kang, Hee-Jun, editor, and Bevilacqua, Vitoantonio, editor

Published
2009
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30. Synthesis of Three-Dimensional Nanocarbon Hybrids by Chemical Vapor Deposition

Author

Dai, GuiPing, Li, Hua-Fei, and Deng, Shuguang

Subjects
Technology & Engineering / Materials Science
Abstract

Carbon nanomaterials such as graphene, carbon nanotube (CNT), and carbon nanofiber (CNF) have received tremendous attentions in the past two decades due to their extraordinary mechanical strength and thermal and electrical properties. Recently, it indicates that three-dimensional (3D) nanocarbon hybrids overcome the weakness of individual low-dimensional nanocarbon materials and exhibit unique properties among carbon nanomaterials. Efforts have thus been made to acquire synergistic integration of one-dimensional (1D) and two-dimensional (2D) carbon nanomaterials. Meanwhile, chemical vapor deposition (CVD) is a widespread and effective method of fabricating three-dimensional nanocarbon hybrids compared with other synthetic methods. In this case, a number of 3D nanocarbon hybrids are synthesized by using different precursors at diverse temperature, and the nanocarbon hybrids are expected to be a promising choice for various application areas in the future.

Published
2022

31. Large-Area Synthesis and Growth Mechanism of Graphene by Chemical Vapor Deposition

Author

Dai, GuiPing, Wang, Chen, and Vinodgopal, Kizhanipuram

Subjects
Science / Chemistry
Abstract

There has been continuous progress in the development of different synthesis methods to readily produce graphene at a lower cost. Compared with the other methods, chemical vapor deposition (CVD) is an effective and powerful method of producing graphene and has attracted increased attention during the last decade. In this way, we can obtain good uniformity with a multitude of domains, excellent quality, and large scale of the produced graphene. Meanwhile, it is also helping for large-area synthesis of single-crystal graphene. In the CVD method, precursors are typically absorbed on the surface followed by pyrolytic decomposition, which leads to the generation of absorption sites on the surface and promotes the growth of continuous thin films.

Published
2022

45. Iodine‐Modified Pd Catalysts Promote the Bifunctional Catalytic Synthesis of 2,5‐Hexanedione from C6 Furan Aldehydes.

Author

Tong, Zhikun, Li, Xiang, Zhu, Jiawei, Chen, Shixia, Dai, Guiping, Deng, Qiang, Wang, Jun, Yang, Weiran, Zeng, Zheling, and Zou, Ji‐Jun

Subjects
CATALYSTS, ALDEHYDES, LEWIS acidity, CATALYTIC activity, HYDROGENOLYSIS
Abstract

Currently, low intimacy between hydrogenation sites and acidic sites causes unsatisfactory catalytic activity and selectivity for the synthesis of 2,5‐hexanedione from C6 furan aldehydes (5‐methylfurfural, 5‐hydroxymethylfurfural). Herein, iodine(I) modification of Pd‐supported catalysts (such as PdI/Al2O3 and PdI/SiO2) was investigated to modulate the hydrogenation sites and acidic sites. Unlike Pd catalysts that produced 71.4 % yield of 2‐hydroxymethyl‐5‐methyl tetrahydrofuran via an overhydrogenation route of 5‐methylfurfural, PdI catalysts showed a high efficiency for 2,5‐hexanedione with 93.7 % yield by a hydrogenative ring‐opening route. More importantly, the selective synthesis of 2,5‐hexanedione from 5‐hydroxymethylfurfural with a high yield of 50.2 % by the hydrogenolysis and subsequent ring‐opening route was reported for the first time. I‐modified Pd nanoparticles produced in‐situ hydrogen spillover, which promoted the selective C=O hydrogenation and ring‐opening steps by regulating the adsorption configuration of the reactants and the transformation of Lewis to Brønsted acidity, respectively. [ABSTRACT FROM AUTHOR]

Published
2022
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