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| 1 | Enhancing strength and creep resistance of Mg-Gd-Y-Zn-Zr alloy by substituting Mn for Zr显示文摘The age-hardening behavior and mechanical properties of the extruded Mg-2Gd-1.2Y-0.5Zn(at.%)alloy with Zr or Mn additions were investigated.The results show that Mn added alloy exhibits more remarkable age-hardening response than Zr added alloy,which is attributed to the fact that partitioning of Mn into the β'phases,β'precipitates and long period stacking ordered(LPSO)phases leads to the decrement in(G d+Y)concentrations in the second phases,facilitating the precipitation during aging treatment.Both peak-aged alloys show bimodal microstructure comprising the fine DRXed grains with nano-sized β phases pinned at DRXed grain boundaries as well as coarse worked grains with strong fiber texture.High strength and good thermal stability were obtained in both peak-aged Mn and Zr added alloys.While the peak-aged Mn added alloy shows higher strength and superior creep resistance due to its denser β'precipitates,thin LPSO phases and γ'precipitates and higher area fraction of worked grains with strong fiber texture.The 0.2% tensile proof stress and ultimate tensile strength of peak-aged Mn added alloy reach up to 454 MPa and 508 MPa,respectively,with elongation of 3.2%at room temperature.The minimum creep rate of the peak-aged Mn added alloy at 250℃/150 MPa is 2.4 × 10^-8 s^-1,which is superior than previously reported extruded Mg-Gd based alloys. | C.Xu T.Nakata G.H.Fan X.W.Li G.Z.Tang S.Kamado | 2019 | Journal of Magnesium and Alloys2019，7，3： | 14 |
| 2 | 碱性过氧化物盘磨机械法制浆新工艺显示文摘论述了最近开发的、建立在大规模中间试验基础上的碱性过氧化物盘磨机械法制浆工艺。这一新工艺是在过氧化物漂白、木化纤维素的化学性质及磨浆机理的基础上开发出来的。主要包括木片的预处理(P)、盘磨化学处理(RC)及木片经预浸后漂白反应在两者之间的合理分配等。为达到最佳的漂白效率,这一新工艺(P-RC)需要一个比较缓和的预处理,在磨浆化学预处理条件下完成大部分的漂白反应。因为浆料在盘磨机中的停留时间较短,磨浆后需要有高浓停留反应过程,这对盘磨化学法处理非常必要。中间试验的研究结果基本再现了工艺路线的设想:(1)与相对剧烈的预汽蒸相比,缓和的预处理条件有利于提高浆的漂白效率和光学性能。(2)磨浆后高浓反应过程可使浆的亮度提高2~3个百分点。(3)在盘磨法漂白工艺中,缓和的预处理与无预处理相比,具有较好的漂白效果。 | Eric C.Xu 李杰辉 | 2001 | 国际造纸2001，20，2： | 7 |
| 3 | Effect of forced-air cooling on the microstructure and age-hardening response of extruded Mg-Gd-Y-Zn-Zr alloy full with LPSO lamella显示文摘The homogenized Mg-8.2 Gd-3.8 Y-1.0 Zn-0.4 Zr(wt.%)alloy full of plate-shaped long period stacking ordered(LPSO)phases was hot extruded in the atmosphere and cooled by the forced-air,then the effect of forced-air cooling on the microstructure and age-hardening response of the alloy was investigated in this work.The results show that in comparison with the extruded sample cooling in the atmosphere,the forced-air cooling restricts dynamic recrystallization(DRX)and brings about finer dynamic recrystallized(DRXed)grain size,stronger basal texture and higher dislocation density.Furthermore,the forced-air cooling promotes the dynamic precipitation in the DRXed regions and facilitates formation of plate-shaped LPSO phases andγ’phases with smaller interspacing in the unrecrystallized(un DRXed)regions,then slightly restricts the precipitation ofβphases during aging.After peak-ageing treatment,the extruded sample with forced-air cooling shows superior tensile properties with a tensile yield strength of 439 MPa,an ultimate tensile strength of 493 MPa,and elongation to failure of 18.6%. | S.Z.Wu T.Nakata G.Z.Tang C.Xu X.J.Wang X.W.Li X.G.Qiao M.Y.Zheng L.Geng S.Kamado G.H.Fan | 2021 | Journal of Materials Science & Technology2021，，14： | 6 |
| 4 | Improvement of strength and ductility synergy in a room-temperature stretch-formable Mg-Al-Mn alloy sheet by twin-roll casting and low-temperature annealing显示文摘Strength and ductility synergy in an Mg-3mass%Al-Mn(AM30)alloy sheet was successfully improved via twin-roll casting and annealing at low-temperature.An AM30 alloy sheet produced by twin-roll casting,homogenization,hot-rolling,and subsequent annealing at 170℃ for 64 h exhibits a good 0.2%proof stress of 170 MPa and a large elongation to failure of 33.1%along the rolling direction.The sheet also shows in-plane isotropic tensile properties,and the 0.2%proof stress and elongation to failure along the transverse direction are 176 MPa and 35.5%,respectively.Though the sheet produced by direct-chill casting also shows moderate strengths if the annealing condition is same,the direct-chill casting leads to the deteriorated elongation to failure of 23.9%and 30.0%for the rolling and transverse directions,respectively.As well as such excellent tensile properties,a high room-temperature stretch formability with an Index Erichsen value of 8.3 mm could be obtained in the twin-roll cast sheet annealed at 170℃ for 64 h.The annealing at a higher temperature further improves the stretch formability;however,this results in the decrease of the tensile properties.Microstructure characterization reveals that the excellent combination of strengths,ductility,and stretch formability in the twin-roll cast sheet annealed at the low-temperature annealing is mainly attributed to the uniform recrystallized microstructure,fine grain size,and circular distribution of(0001)poles away from the normal direction of the sheet. | T.Nakata C.Xu K.Kaibe Y.Yoshida K.Yoshida S.Kamado | 2022 | Journal of Magnesium and Alloys2022，10，4： | 5 |
| 5 | Quasi-in-situ observing the rare earth texture evolution in an extruded Mg-Zn-Gd alloy with bimodal microstructure显示文摘The static recrystallization and associated texture evolution were investigated in an extruded Mg-Zn-Gd alloy with bimodal microstructure based on a quasi-in-situ electron back-scatter diffraction(EBSD)method.The typical rare earth(RE)texture formed during annealing,evolving from the bimodal microstructure with[1010]basal fiber texture that consisted of fine recrystallized(RXed)grains and coarse unrecrystallized(un RXed)grains elongated along the extrusion direction.In both RXed and un RXed regions,the RXed nucleation produced randomized orientations without preferred selection and the RXed grains with RE texture orientation had more intensive growth ability than those with basal fiber orientation,thereby leading to the preferred selection of RE texture orientation during grain growth.The relationships between stored strain energy,solute drag,grain growth and texture evolution are discussed in detail.This study provided direct evidence of the RE texture evolution in an extruded Mg-RE alloy,which assists in understanding the formation mechanisms for RE texture during extrusion and better developing wrought Mg alloys with improved formability. | M.G.Jiang C.Xu H.Yan T.Nakata Z.W.Chen C.S.Lao R.S.Chen S.Kamado E.H.Han | 2021 | Journal of Magnesium and Alloys2021，9，5： | 4 |
| 6 | 加拿大杨木P-RC APMP浆及其漂白硫酸盐浆的协同效应显示文摘单独和以不同配比对加拿大杨木P-RCAPMP浆及其漂白硫酸盐商品浆进行低浓磨浆,比较了其性质。结果如下:①加拿大杨木P-RCAPMP浆及其漂白硫酸盐浆在纤维内结合强度方面有协同效应:与两种浆料的加权作用相比,混合后的浆料有更高的抗张强度、抗张能量吸收和伸长率;②用一定配比的杨木P-RCAPMP浆代替漂白硫酸盐杨木浆不仅能提高浆料的松厚度、光散射系数和不透明度,还能提高抗张强度、抗张能量吸收和伸长率;③在硫酸盐杨木浆中加入杨木P-RCAPMP浆不会改变游离度/能量的曲线变化趋势。 | ERIC C.XU 黄海 夏新兴 | 2006 | 国际造纸2006，25，6： | 3 |
| 7 | 2008年汶川地震滑坡易发性评价模型对比研究显示文摘对比了6个基于地理信息系统(GIS)的地震滑坡易发性评价模型,包括二元统计(BS)、逻辑回归(LR)、人工神经网络(ANN),以及基于线性、多项式和径向基三种核函数类型的支持向量机(SVM)模型。这些模型被应用于嘉陵江的支流——涪江的一个支流流域,该区域是2008年5月12日汶川地震影响区的一部分。滑坡编录图、坡度、坡向、高程、斜坡曲率、到水系距离、地形湿度指数(TWI)、到公路距离、到地表破裂距离、峰值地动加速度(PGA)和岩性共11个专题图层被应用到该研究中。根据上述6类地震滑坡易发性评价模型与应用同样的输入,得到6个地震滑坡易发性索引图。利用2个曲线下面积(AUC)指标分别表示模型正确率和预测率,来检验这6类模型的性能。结果表明逻辑回归模型的结果成功率和预测率均为最高,为80.34%和80.27%。其次为基于径向基函数的支持向量机模型,其成功率和预测率分别为80.302%和80.151%,与逻辑回归模型的结果接近。结果最差的是基于线性函数的支持向量机模型,成功率和预测率分别仅为72.52%和72.533%。此外,结果表明径向基核函数是该区域地震滑坡易发性评价工作的3种核函数中最合适的核函数。一直以来,研究人员认为软计算技术(如人工神经网络和支持向量机)的性能要好于逻辑回归和二元统计模型,本研究提供了一个反例。 | C.Xu X.W.Xu F.C.Dai A.K.Saraf 许冲(译) 吕春来(校) | 2018 | 世界地震译丛2018，49，3： | 2 |
| 8 | 区域地震滑坡体积优化模型显示文摘求取滑坡体积在当前是一个难题,原因是其为三维分量,并且部分滑面往往在地下。本文提出了3个区域地震滑坡体积优化模型来计算2008年中国汶川M W7.9地震触发滑坡的体积。本文首先基于20m分辨率的震前和震后SPOT 5卫星影像提取到的数字高程模型(DEM)数据,结合少数滑坡的剖面图,获得了1 415处汶川地震滑坡堆积区体积,作为地震滑坡体积模型训练样本。在常规区域滑坡'体积—面积'模型基础上,提出了3个优化模型。分别利用数据的对数化线性拟合与直接非线性拟合方法对1个常规模型和3个优化模型进行拟合。结果表明,采用直接非线性拟合方法并考虑了滑坡长、宽、高、岩性、坡度和峰值地动加速度后,坡向的优化模型标准误差最小,回归得到的滑坡总体积与滑坡真实总体积也非常接近。将这一模型应用于所有汶川地震滑坡,分别得到每个滑坡的体积。最终结果表明,汶川地震滑坡相对密集分布区内的196 007处滑坡的堆积物体积约为1.2×1010 m^3,源区体积约为1×1010 m^3。根据前人'地震震级—滑坡总体积'经验公式得到的结果仅仅是本文结果的7.5%~9%,这提醒我们有必要基于更多的单次地震触发滑坡总体体积数据对'地震震级—滑坡总体积'的关系进行更新。同时,文中的优化模型对同类研究也有显著的参考价值。 | C.Xu X.W.Xu L.L.Shen Q.Yao X.B.Tan W.J.Kang S.Y.Ma X.Y.Wu J.T.Cai M.X.Gao K.Li 许冲(译) 吕春来(校) | 2018 | 世界地震译丛2018，49，3： | 2 |
| 9 | On the microstructural origin of premature failure of creep strength enhanced martensitic steels显示文摘The creep strength enhanced martensitic steels are key material for the main power generating units in ultra-supercritical plants.Studies on the evaluation of their creep rupture life show there is an overestimation of rupture life after long-term creep,which is known as premature failure.However,the microstructural origin of the premature failure remains unclear.Here in this study,we have carefully investigated the microstructural transformations and their influences on creep rupture behavior,showing that the evolution of martensite and M_(23)C_(6) carbides as well as Laves phase are responsible for the premature failure.By using multi-step TTP-LMP method,we confirmed a three-stage creep rupture behavior under different stress regions.Further quantitative analysis showed that the coarsening of M_(23)C_(6) carbides and recovery of martensite exert equal and dominant effects on the premature failure in the medium stress region,while precipitation and coarsening of Laves phase are responsible for the premature failure in the low stress region. | J.Li C.Xu G.Zheng W.J.Dai C.C.Bu G.Chen | 2021 | Journal of Materials Science & Technology2021，，28： | 2 |
| 10 | GABAB receptor activation protects neurons from apoptosis via IGF-1 receptor transactivation显示文摘 | H.Tu C.Xu W.Zhang | | 0，，： | 1 |
| 11 | 查看详情显示文摘 | A.Thess R.Lee P.Nikolaev H.J.Dai P.Petit J.Robert C.Xu Y.H.Lee S.G.Kim A.G.Rinzler D.T.Colbert G.E.Scuseria D.Tomanek J.E.Fischer and R.E.Smalley | | 0，，5274： | 1 |
| 12 | Dominant role of GABAB2 and Gbetagamma for GABAB receptor-mediated-ERK1/2/CREB pathway in cerebellar neurons显示文摘 | H.Tu P.Rondard C.Xu | | 0，，： | 1 |
| 13 | Identification of Two Blast Resistance Genes in a Rice Variety, Digu显示文摘 | X. W.Chen S. G.Li J. C.Xu W. X.Zhai Z. Z.Ling B. T.Ma Y. P.Wang W. M.Wang G.Cao Y. Q.Ma J. J.Shang X. F.Zhao K. D.Zhou L. H.Zhu | 2004 | Journal of Phytopathology2004，，2： | 1 |
| 14 | Control of dislocation density maximizing precipitation strengthening effect显示文摘The strength-ductility trade-off has been the most challenging problem for structural metals for centuries.Nanoprecipitation strengthening is an ideal approach to enhance the strength without significantly sacrificing the ductility.Stable nanoprecipitates have been successfully acquired by nanostructural design,but the number density of nanoprecipitates cannot be further increased.Researchers attempted to enhance number density by introducing highly potent nucleation sites(e.g.,dislocations).However,there remains controversy over the influence of dislocations on the nucleation and growth of coherent nanoprecipitates with minimized nucleation barrier.Here,Cu-rich nanoprecipitates in an HSLA steel,as a typical type of coherent nanoprecipitates,are investigated.By combining analytical calculation and experiments,we show that dislocations are harmful for the formation of large numbered Cu-rich nanoprecipitates in a certain density range.Insufficient dislocations deprive solute atoms which decrease homogenous precipitation that cannot be compensated by the increase in heterogeneous precipitation.Under such circumstance,Cu-rich nanoprecipitates have smaller number density but larger size and higher fraction of incoherent structures due to rapid Ostwald ripening.As a result,by controlling dislocation density,the yield strength is increased by 24%without obvious loss in ductility as compared with traditional solution-quench-age process.Our work would help to optimize composition and processing routes that fully exploit the nanoprecipitation strengthening effect. | C.Xu W.J.Dai Y.Chen Z.X.Qi G.Zheng Y.D.Cao J.P.Zhang C.C.Bu G.Chen | 2022 | Journal of Materials Science & Technology2022，，32： | 1 |
| 15 | 查看详情显示文摘 | C.Xu J.K.Bartley D.I.Enache | | 0，，： | 1 |
| 16 | Capecitabine for the treatment for advanced gastric cancer: efficacy, safety and ethnicity显示文摘 | Y.Ma L.Tang H.‐X.Wang Y.‐C.Xu Y.Ma F.‐C.Zhang | 2012 | Journal of Clinical Pharmacy and Therapeutics2012，，3： | 1 |
| 17 | Ceneralized gradient vector flow external force for active contours显示文摘 | C.Xu J.L.Prince | | 0，，02： | 1 |
| 18 | Risk Factors for Early Epithelial to Mesenchymal Transition in Renal Grafts显示文摘 | A.Hertig J.Verine B.Mougenot C.Jouanneau N.Ouali P.Sebe D.Glotz P.‐Y.Ancel E.Rondeau Y.‐C.Xu‐Dubois | 2006 | American Journal of Transplantation2006，，12： | 1 |
| 19 | 改进WEPP研究森林小区的土壤侵蚀显示文摘 | Joan Q.Wu Arthur C.Xu William J.Elliot | 2002 | 中国水土保持2002，，7： | 1 |
| 20 | Polyphenolic Acids from Mint (the Aerial of?Mentha haplocalyx?Briq.) with DPPH Radical Scavenging Activity显示文摘 | G.‐M.She C.Xu B.Liu R.‐B.Shi | 2010 | Journal of Food Science2010，，： | 1 |
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