10 research outputs found

    The wordlist of target syllables (/ji/ and /fu/) and fillers (/se/ and /jɐu/) carrying six tones.

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    The wordlist of target syllables (/ji/ and /fu/) and fillers (/se/ and /jɐu/) carrying six tones.</p

    Assimilation matrix of Vietnamese and Mandarin categories for each Cantonese tone, with similarity ratings in brackets.

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    Asterisks* refer to assimilated tones. The colors of the rectangles indicate assimilation percentages. NC = no category. MT = Mandarin tone. ngang = ā€œlevelā€ tone. sįŗÆc = ā€œsharpā€ tone. huyį»n = ā€œdeepā€ tone. nįŗ·ng = ā€œheavyā€ tone. ngĆ£ = ā€œtumblingā€ tone. hį»i = ā€œaskingā€ tone.</p

    Mean <i>d</i>ā€² scores in tonal discrimination for speech and non-speech types as a function of language group.

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    Mean dā€² scores in tonal discrimination for speech and non-speech types as a function of language group.</p

    The degree of assimilation diversity (<i>K</i>ā€²) of Vietnamese and Mandarin groups for six Cantonese tones.

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    The degree of assimilation diversity (Kā€²) of Vietnamese and Mandarin groups for six Cantonese tones.</p

    Fig 1 -

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    F0 patterns of Vietnamese tones (left panel), Mandarin tones (mid panel), and Japanese pitch accents (right panel). The Vietnamese and Mandarin tones were carried by the syllable /ma/; the Japanese pitch accents were carried by the word /fu:/ adapted from [40].</p

    Fit indexes of six Cantonese tones to corresponding assimilated tones in Mandarin and Vietnamese systems.

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    Fit indexes of six Cantonese tones to corresponding assimilated tones in Mandarin and Vietnamese systems.</p

    Mean <i>dā€²</i> scores (Ā±SE) for specific contrast types as a function of language group.

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    Mean dā€² scores (Ā±SE) for specific contrast types as a function of language group.</p

    Mesoporous Ni<sub>0.85</sub>Se Nanospheres Grown in Situ on Graphene with High Performance in Dye-Sensitized Solar Cells

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    Mesoporous Ni<sub>0.85</sub>Se nanospheres grown on graphene were synthesized via the hydrothermal approach. Because of the exceptional electron-transfer pathway of graphene and the excellent catalytic ability of the mesoporous Ni<sub>0.85</sub>Se nanospheres, the nanocomposites exhibited excellent electrocatalytic property as the counter electrode (CE) of dye-sensitized solar cells. More catalytic active sites, better charge-transfer ability and faster reaction velocity of Ni<sub>0.85</sub>Se@RGO (RGO = reduced graphene oxide) CE led to faster and more complete I<sub>3</sub><sup>ā€“</sup> reduction than Pt, Ni<sub>0.85</sub>Se, and RGO CEs. Furthermore, the power conversion efficiency of Ni<sub>0.85</sub>Se@RGO CE reached 7.82%, which is higher than that of Pt CE (7.54%). Electrochemical impedance spectra, cyclic voltammetry, and Tafel polarization were obtained to demonstrate positive synergetic effect between Ni<sub>0.85</sub>Se and RGO, as well as the higher catalytic activity and the better charge-transfer ability of Ni<sub>0.85</sub>Se@RGO compared with Pt CE

    <i>In Situ</i> Formed Ti/Nb Nanocatalysts within a Bimetal 3D MXene Nanostructure Realizing Long Cyclic Lifetime and Faster Kinetic Rates of MgH<sub>2</sub>

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    Magnesium hydride (MGH) is a high-capacity and low-cost hydrogen storage material; however, slow kinetic rates, high dehydrogenation temperature, and short cycle life hindered its large-scale applications. We proposed a strategy of designing novel delaminated 3D bimetal MXene (d-TiNbCTx) nanostructure to solve these problems. The on-set dehydrogenation temperature of MGH@d-TiNbCTx composition was reduced to 150 Ā°C, achieving 7.2 wt % of hydrogen releasing capacity within the range of 150ā€“250 Ā°C. This composition absorbed 7.2 wt % hydrogen within 5 min at 200 Ā°C and 5.5 wt % at 30 Ā°C within 2 h, while the desorption capacity (6.0 wt %) was measured at 275 Ā°C within 7 min. After 150 cycles at 250 Ā°C, the 6.5 wt % capacity was retained with negligible loss of hydrogen content. These results were attributed to the catalytic effect of in situ-formed TiH2/NbH2 nanocatalysts, which lead to dissociate the Mgā€“H bonds and promote of kinetic rates. This unique structure paves great opportunities for designing of highly efficient MGHs/MXene nanocomposites to improve the hydrogen storage performance of MGHs
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