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| 1 | Microstructural evolution of Mg-7Al-2Sn Mg alloy during multi-directional impact forging显示文摘Multi-directional impact forging(MDIF)was applied to a Mg-7Al-2Sn(wt.%)Mg alloy to investigate its effect on the microstructural evolution.MDIF process exhibited high grain refinement efficiency.After MDIF 200 passes,the grain size drastically decreased to 20µm from the initial coarse grains of~500µm due to dynamic recrystallization(DRX).Meanwhile,original grain boundaries remained during MDIF and large numbers of fine sphericalβ-Mg_(17)Al_(12) particles dynamically precipitated along the original grain boundaries with high Al concentration,acting as effective pinning obstacles for the suppression of DRXed grain growth.Besides,micro-cracks nucleated during MDIF and propagated along the interface between the remained globular or cubic Al-Mn particles and Mg matrix. | M.G.Jiang H.Yan L.Gao R.S.Chen | 2015 | Journal of Magnesium and Alloys2015，3，3： | 5 |
| 2 | Non-Maxwellian electron distributions resulting from direct laser acceleration in near-critical plasmas显示文摘The irradiation of few-nm-thick targets by a finite-contrast high-intensity short-pulse laser results in a strong pre-expansion of these targets at the arrival time of the main pulse.The targets decompress to near and lower than critical densities with plasmas extending over few micrometers,i.e.multiple wavelengths.The interaction of the main pulse with such a highly localized but inhomogeneous target leads to the generation of a short channel and further self-focusing of the laser beam.Experiments at the Glass Hybrid OPCPA Scaled Test-bed(GHOST)laser system at University of Texas,Austin using such targets measured non-Maxwellian,peaked electron distribution with large bunch charge and high electron density in the laser propagation direction.These results are reproduced in 2D PIC simulations using the EPOCH code,identifying direct laser acceleration(DLA)[1]as the responsible mechanism.This is the first time that DLA has been observed to produce peaked spectra as opposed to broad,Maxwellian spectra observed in earlier experiments[2].This high-density electrons have potential applications as injector beams for a further wakefield acceleration stage as well as for pump-probe applications. | T.Toncian C.Wang E.McCary A.Meadows A.V.Arefiev J.Blakeney K.Serratto D.Kuk C.Chester R.Roycroft L.Gao H.Fu X.Q.Yan J.Schreiber I.Pomerantz A.Bernstein H.Quevedo G.Dyer T.Ditmire B.M.Hegelich | 2016 | Matter and Radiation at Extremes2016，1，1： | 3 |
| 3 | 查看详情显示文摘 | Z.T.Deng H.Lin W.Ji L.Gao X.Lin Z.H.Cheng X.B.He J.L.Lu D.X.Shi W.A.Hofer and H.J.Gao | | 0，，15： | 1 |
| 4 | Transient Stability Enhancement and Voltage Regulation of Power Systems显示文摘 | Y.Wang D.J.Hill L.Gao R.H.Middleton | | 0，，： | 1 |
| 5 | DFL-Nonlinear Control Design with Applications in Power System显示文摘 | L.Gao L.Chen Y.Fan H.Ma | | 0，，： | 1 |
| 6 | Dyspepsia and irritable bowel syndrome in China: a population‐based endoscopy study of prevalence and impact显示文摘 | Y.Zhao D.Zou R.Wang X.Ma X.Yan X.Man L.Gao J.Fang H.Yan X.Kang P.Yin Y.Hao Q.Li J.Dent J.Sung K.Halling B.Wernersson S.Johansson J.He | 2010 | Alimentary Pharmacology & Therapeutics2010，，4： | 1 |
| 7 | Antioxidant activity and total phenolics in elected fruits,vegetables,and grain products显示文摘 | Y.S.Velioglu G.Mazza L.Gao B.D.Oomah | | 0，，： | 1 |
| 8 | Body mass index, chronic atrophic gastritis and heartburn: a population‐based study among 8936 older adults from Germany显示文摘 | L.Gao M. N.Weck D.Rothenbacher H.Brenner | 2010 | Alimentary Pharmacology & Therapeutics2010，，2： | 1 |
| 9 | Regression to normoglycaemia by fenofibrate in pre‐diabetic subjects complicated with hypertriglyceridaemia: a prospective randomized controlled trial显示文摘 | Q.Guan Y.Liu C.Wang L.Feng G.Gao L.Gao J.Zhao | 2010 | Diabetic Medicine2010，，11： | 1 |
| 10 | Selection for Cheaper Amino Acids Drives Nucleotide Usage at the Start of Translation in Eukaryotic Genes显示文摘Coding regions have complex interactions among multiple selective forces,which are manifested as biases in nucleotide composition.Previous studies have revealed a decreasing GC gradient from the 5′-end to 3′-end of coding regions in various organisms.We confirmed that this gradient is universal in eukaryotic genes,but the decrease only starts from the~25th codon.This trend is mostly found in nonsynonymous(ns)sites at which the GC gradient is universal across the eukaryotic genome.Increased GC contents at ns sites result in cheaper amino acids,indicating a universal selection for energy efficiency toward the N-termini of encoded proteins.Within a genome,the decreasing GC gradient is intensified from lowly to highly expressed genes(more and more protein products),further supporting this hypothesis.This reveals a conserved selective constraint for cheaper amino acids at the translation start that drives the increased GC contents at ns sites.Elevated GC contents can facilitate transcription but result in a more stable local secondary structure around the start codon and subsequently impede translation initiation.Conversely,the GC gradients at four-fold and two-fold synonymous sites vary across species.They could decrease or increase,suggesting different constraints acting at the GC contents of different codon sites in different species.This study reveals that the overall GC contents at the translation start are consequences of complex interactions among several major biological processes that shape the nucleotide sequences,especially efficient energy usage. | Na L.Gao Zilong He Qianhui Zhu Puzi Jiang Songnian Hu Wei-Hua Chen | 2021 | Genomics, Proteomics & Bioinformatics2021，19，6： | 0 |
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