496,409 research outputs found
A possible mechanism of superconductivity in high-T-c cuprates
No full textThis paper derives a generic T-c formula by using the long-range phase coherence condition in quantum phase fluctuation of the order parameter. Taking the two-local-spin-mediated interaction (TLSMI) proposed by Liu and Chen [Phys. Rev. B 58 (1998) 8812] as a Cooper pair potential, and the T-c formula, this paper explains five basic experimental facts in high-T-c cuprates. The aim of this paper is to show that TLSMI is a possible pairing mechanism of superconductivity in high-T-c cuprates. (C) 2000 Elsevier Science B.V. All rights reserved.Physics, AppliedSCI(E)EI0ARTICLE4276-28434
Test Make Sense?
No full textCorresponding author Changyu Liu should be listed as the first corresponding author.No Full Tex
LIU Chancellor Gordon Hoxie and Professor Winthrop Palmer
No full textOriginal black-and-white photograph. Left-to-right: LIU Chancellor Gordon Hoxie, C. W. Post benefactor and English Department Professor Winthrop Palmer, unknown woman, Professor Volpe.https://digitalcommons.liu.edu/post_early/1017/thumbnail.jp
Michaelcallianassa sinica Liu & Liu 2009
No full textMichaelcallianassa sinica Liu & Liu, 2009 (Fig. 6) Michaelcallianassa sinica Liu & Liu, 2009: 40, figs. 1–5; — Poore et al., 2019: table 1; — Robles et al., 2020: suppl. tables 1, 2. CMBS material. 1 ov. female (24/5.7) (ZRC 2017.0957) [DNA voucher GenBank MN 238003, MN 237806, MN 238459, MN 238241], sta. DR235, east of Pulau Tekong, MPA grid 0524, sand-mud, rectangular dredge, 13.1–14.7 m, coll. TMSI team, 11 May 2013 (SEA-1943). Comparative material. Michaelcallianassa indica Sakai, 2002: 1 male, 1 female (NHMW 24989), Iran, Persian Gulf, Bandar-Khamir, coll. V. Sepahvand, 2009. Description. See Liu & Liu (2009). Distribution. Beibu Gulf, South-China Sea (Liu & Liu, 2009), Singapore (this study). Habitat. “Sediment” at depth range of 31–50 m (Liu & Liu, 2009); sand-mud bottom, 13–15 m (this study). Remarks. The present specimen represents a new record of Mi. sinica for Singapore.Published as part of Dworschak, Peter C. & Anker, Arthur, 2022, Axiidea (Crustacea: Callianassidae, Callichiridae and Ctenochelidae) and Gebiidea (Upogebiidae) collected during the Comprehensive Marine Biodiversity Survey of Singapore, pp. 108-133 in Raffles Bulletin of Zoology 70 on page 110, DOI: 10.26107/RBZ-2022-0008, http://zenodo.org/record/717509
Difference based Ridge and Liu type Estimators in Semiparametric Regression Models
Full text linkWe consider a difference based ridge regression estimator and a Liu type estimator of the regression parameters in the partial linear semiparametric regression model, y = Xβ + f + ε. Both estimators are analysed and compared in the sense of mean-squared error. We consider the case of independent errors with equal variance and give conditions under which the proposed estimators are superior to the unbiased difference based estimation technique. We extend the results to account for heteroscedasticity and autocovariance in the error terms. Finally, we illustrate the performance of these estimators with an application to the determinants of electricity consumption in Germany.Difference based estimator; Differencing estimator, Differencing matrix, Liu estimator, Liu type estimator, Multicollinearity, Ridge regression estimator, Semiparametric model
Electrochemical behavior of diazirines
No full textPT: J; CR: ENGEL PS, 1980, CHEM REV, V80, P99 FRY AJ, 1973, J ORG CHEM, V38, P2620 KITAJEV JP, 1965, COLLECT CZECH CHEM C, V30, P4178 LIU MTH, 1981, J CHEM SOC P2, P53 LUND H, 1966, COLLECT CZECH CHEM C, V31, P4175 MALACHESKY PA, 1969, ANAL CHEM, V41, P1493 MOFFAT JB, 1978, CHEM DIAZONIUM DIA 1 NICHOLSON RS, 1964, ANAL CHEM, V36, P706 SCHWARZ WM, 1965, J PHYS CHEM-US, V69, P30; NR: 9; TC: 2; J9: J CHEM SOC CHEM COMMUN; PG: 2; GA: NJ399Source type: Electronic(1
Insertion of phenylchlorocarbenes in the C-H bonds of alkanes: measurement of the rate constants by laser flash photolysis
No full textPhenylchlorocarbenes, produced by photolysis of the parent diazirines, have a very limited lifetime in alkane solvents. The rate of disappearance of p-methyl- and p-chlorophenylchlorocarbenes has been measured in iso-octane, cyclohexane and n-hexane as well as in benzene for comparison. The rate constants of several processes (dimerization, addition to the diazirine, reaction with the solvent, etc. ) contributing to the disappearance of the phenylchlorocarbenes have been determined. The rate of reaction with the solvent, which is much lower in benzene than in alkanes and depends strongly on the nature of the alkane, is assumed to be an insertion of the carbene in the C-H bonds of the solvent. Consequences of this reaction on the chemistry of carbenes produced by continuous irradiation (or thermolysis) of diazirines in alkanes are briefly discussed.PT: J; CR: BENSASSON R, 1971, T FARADAY SOC, V67, P1904 BONNEAU R, 1986, NOUV J CHIM, V10, P425 BONNEAU R, 1991, PURE APPL CHEM, V63, P289 DOYLE MP, 1988, TETRAHEDRON LETT, V29, P5863 GOULD IR, 1985, TETRAHEDRON, V41, P1587 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 LIU MTH, 1987, CHEM DIAZIRINES LIU MTH, 1990, J CHEM SOC CHEM COMM, P1482 LIU MTH, 1992, J AM CHEM SOC, V114, P3604 LIU MTH, 1992, J ORG CHEM, V57, P2483 LIU MTH, 1992, J PHOTOCH PHOTOBIO A, V63, P115 LUTZ H, 1973, J PHYS CHEM-US, V77, P1758 MORGAN S, 1991, J AM CHEM SOC, V113, P2782 MOSS RA, 1990, J AM CHEM SOC, V112, P5642 MOSS RA, 1990, KINETICS SPECTROSCOP; NR: 15; TC: 11; J9: J PHOTOCHEM PHOTOBIOL A-CHEM; PG: 10; GA: JQ196Source type: Electronic(1
Mecopoda minor Liu & Heller & Wang & Yang & Wu & Liu & Zhang 2020
No full textSpecies group minor Liu Diagnosis (species group “c”). The songs are constituted by numerous discontinuous chirps at the beginning followed by continuous syllables (Figs 3 a–k). Notes. According to the song characteristics (Liu et al., 2019), M. hainanensis He, 2019, should be put into the species group. Included species and subspecies. M. minor sp. n. (East Asia), M. m. yunnana sub sp. n. (China), M. hainanensis He, 2019 (China).Published as part of Liu, Chun-Xiang, Heller, Klaus-Gerhard, Wang, Xue-Song, Yang, Zhen, Wu, Chao, Liu, Fei & Zhang, Tao, 2020, Taxonomy of a katydid genus Mecopoda Serville (Orthoptera: Tettigoniidae, Mecopodinae) from East Asia, pp. 296-310 in Zootaxa 4758 (2) on page 305, DOI: 10.11646/zootaxa.4758.2.5, http://zenodo.org/record/373448
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