The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Lansun Zheng - One of the best experts on this subject based on the ideXlab platform.
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anion dependent assembly of Cyclic Structure
Crystal Growth & Design, 2006Co-Authors: Xiangjian Kong, Lasheng Long, Rongbin Huang, Lansun ZhengAbstract:Five Keggin-based metal complexes, [Ag3(2,4‘-bipy)3PMo12O40] (1), [Ag4(2,4‘-bipy)4SiW12O40] (2), [Ag3(2,4‘-bipy)4PW12O40] (3), [Cu4(2,4‘-bipy)4SiW12O40] (4), and [Cu3(2,4‘-bipy)4PW12O40] (5) (2,4‘-bipy = 2,4‘-bipyridine), were synthesized and structurally characterized. Among them, complexes 1, 2, and 4 show a Cyclic Structure, while complexes 3 and 5 exhibit a one-dimensional (1D) chain Structure. Investigation of their structural differences reveals that anions play a key role in the formation of a Cyclic Structure.
Khaled Abdel-ghaffar - One of the best experts on this subject based on the ideXlab platform.
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ITA - Decoding of quasi-Cyclic LDPC codes with section-wise Cyclic Structure
2014 Information Theory and Applications Workshop (ITA), 2014Co-Authors: Juane Li, Khaled Abdel-ghaffarAbstract:Presented in this paper is a reduced-complexity iterative decoding scheme for quasi-Cyclic (QC) LDPC codes. This decoding scheme is devised based on the section-wise Cyclic Structure of the parity-check matrix of a QC-LDPC code. Using this decoding scheme, the hardware implementation complexity of a QC-LDPC decoder can be significantly reduced without performance degradation. A high-rate QC-LDPC code that can achieve a very low error-rate without a visible error-floor is used to demonstrate the effectiveness of the proposed decoding scheme. Also presented in this paper are two other high-rate QC-LDPC codes and a method for constructing rate -1/2 QC-LDPC codes whose Tanner graphs have girth 8. All the codes constructed perform well with low error-floor using the proposed decoding scheme.
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Decoding of quasi-Cyclic LDPC codes with section-wise Cyclic Structure
2014 Information Theory and Applications Workshop (ITA), 2014Co-Authors: Juane Li, Khaled Abdel-ghaffarAbstract:Presented in this paper is a reduced-complexity iterative decoding scheme for quasi-Cyclic (QC) LDPC codes. This decoding scheme is devised based on the section-wise Cyclic Structure of the parity-check matrix of a QC-LDPC code. Using this decoding scheme, the hardware implementation complexity of a QC-LDPC decoder can be significantly reduced without performance degradation. A high-rate QC-LDPC code that can achieve a very low error-rate without a visible error-floor is used to demonstrate the effectiveness of the proposed decoding scheme. Also presented in this paper are two other high-rate QC-LDPC codes and a method for constructing rate -1/2 QC-LDPC codes whose Tanner graphs have girth 8. All the codes constructed perform well with low error-floor using the proposed decoding scheme.
Moustapha Mbaye - One of the best experts on this subject based on the ideXlab platform.
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A nonlinear component mode synthesis method for the computation of steady-state vibrations in non-conservative systems
Mechanical Systems and Signal Processing, 2017Co-Authors: colas joannin, J.-P. Ousty, Benjamin Chouvion, Fabrice Thouverez, Moustapha MbayeAbstract:This paper presents an extension to classic component mode synthesis methods to compute the steady-state forced response of nonlinear and dissipative Structures. The procedure makes use of the nonlinear complex modes of each subStructure, computed by means of a modified harmonic balance method, in order to build a reduced-order model easily solved by standard iterative solvers. The proposed method is applied to a mistuned Cyclic Structure subjected to dry friction forces, and proves particularly suitable for the study of such systems with high modal density and non-conservative nonlinearities.
Xiangjian Kong - One of the best experts on this subject based on the ideXlab platform.
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anion dependent assembly of Cyclic Structure
Crystal Growth & Design, 2006Co-Authors: Xiangjian Kong, Lasheng Long, Rongbin Huang, Lansun ZhengAbstract:Five Keggin-based metal complexes, [Ag3(2,4‘-bipy)3PMo12O40] (1), [Ag4(2,4‘-bipy)4SiW12O40] (2), [Ag3(2,4‘-bipy)4PW12O40] (3), [Cu4(2,4‘-bipy)4SiW12O40] (4), and [Cu3(2,4‘-bipy)4PW12O40] (5) (2,4‘-bipy = 2,4‘-bipyridine), were synthesized and structurally characterized. Among them, complexes 1, 2, and 4 show a Cyclic Structure, while complexes 3 and 5 exhibit a one-dimensional (1D) chain Structure. Investigation of their structural differences reveals that anions play a key role in the formation of a Cyclic Structure.
Philippe Poizot - One of the best experts on this subject based on the ideXlab platform.
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evaluation of polyketones with n Cyclic Structure as electrode material for electrochemical energy storage case of pyromellitic diimide dilithium salt
Chemical Communications, 2011Co-Authors: Steven Renault, Joaquin Geng, Franck Dolhem, Philippe PoizotAbstract:Pyromellitic diimide dilithium salt was selected to complete our database on redox-active polyketones with a N-Cyclic Structure. Although never reported to date, such a lithiated salt was readily synthesized making its electrochemical evaluation in a Li battery possible. Preliminary data show that this novel material reversibly inserts two Li per formula unit at a relatively low potential giving a stable capacity value of 200 mAh g−1.
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evaluation of polyketones with n Cyclic Structure as electrode material for electrochemical energy storage case of tetraketopiperazine unit
Energy and Environmental Science, 2010Co-Authors: Joaquin Geng, Jeanpierre Bonnet, Steven Renault, Franck Dolhem, Philippe PoizotAbstract:Pursuing the electrochemical evaluation vs. Li of carbonyl-based Cyclic Structures deriving from the oxocarbon family, polyketones with N-Cyclic Structure are investigated to probe the potential modifications. In this communication, we specifically report on the electrochemical investigation of our first selected family of heterocycles based on the 2,3,5,6-tetraketopiperazine unit. Working in a systematic way, a series of tetraketopiperazine molecules with quite different R groups as substituents (i.e., phenyl, allyl and propyl functions) have been synthesized and characterized. Such small molecules were found to rapidly solubilise in commonly used electrolytes. To bypass this issue, we have prepared an oligomeric form via aCyclic diene metathesis (ADMET). Preliminary results on the poly-N,N′-diallyl-2,3,5,6-tetraketopiperazine oligomer show a sustained reversible capacity of 110 mAh g−1 at near 2.45 V. The insight gained from this work is the fact that two intraCyclic nitrogen atoms or a lithiated ene–diolate functionality in the C6-based polyketone Cyclic Structure induces a similar tuning of the redox potential.
