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Reduction effect of final-pass heavy reduction rolling on the texture development,tensile property and stretch formability of ZWK100 alloy plates

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Journal of Materials Science & Technology 2022年第16期111卷 211-223页

作者： B.Q.Shi L.Y.Zhao X.L.Shang B.h.nie D.C.Chen C.Q.Li Y.Q.Cheng School of Materials Science and hydrogen Energy Foshan UniversityFoshan 528000China School of Materials and Energy Guangdong University of TechnologyGuangzhouGuangdong 510006China GD Midea Air-conditioning Equipment co. Ltd.Foshan 528311China Guangdong Key Laboratory of hydrogen Energy Technology Foshan 528000China YunFu(Foshan)R&D Center of hydrogen Energy Standardization Yunfu 527326China

Obviously planar anisotropy due to‘TD split’orthotropic texture(TD indicates Transverse direction)always exist in the Rare-earth(RE)or Ca containing Mg alloy sheets,which is likely caused by the lowreduction rolling(and annealing)as revealed in our previous *** this work,the as-cast billets of a ZWK100 alloy were subjected to final-pass heavy reduction rolling(FhRR)at 500°C with different reductions(30%-70%)after rough rolling,aiming to investigate the reduction effect on the microstructure and texture *** results show that FhRR with higher reductions above 50%is in favor of shear banding formation but has little effect on the as-deformed texture components,and the excellent formability with single-pass reduction up to 70%is mainly ascribed to the activation of prismatic *** with reduction above 50%and annealing can generate uniform grain structures of~10μm and symmetrical‘oblique-line split’texture in(0001)pole figures,with basal poles tilting by about 50°from ND(Normal direction)towards some oblique-line of TD and RD(Rolling direction)as well as uniform distribution of counter lines as an annular shape,resulting in excellent elongation to failure of~50%and ultra-low planar anisotropyΔr_of~0.1 and high stretch formability(Erichsen value:8.1).The formation‘oblique-line split’texture in(0001)pole figures is mainly correlated with the preferred growth tendency of grains with■//RD,which was suggested to relate to the high mobility of some special boundaries such as 40°-45°■.The influences of starting textures on the mechanical properties,planar anisotropy and related deformation modes,as well as their correlations with the stretch formability were comparatively investigated with the‘TD split’orthotropic texture as a counterpoint.

关键词： Magnesium alloys Texture Plane anisotropy Stretch formability Rolled sheets

含杂质超临界co_(2)输送管道停输再启动瞬态特性研究

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中国安全生产科学技术 2024年第5期20卷 43-49页

作者：苗青殷布泽王鑫聂超飞李玉星李其抚胡其会国家石油天然气管网集团有限公司科学技术研究总院分公司河北廊坊065000 中国石油大学(华东)储运与建筑工程学院山东青岛266500 中国石油技术开发有限公司北京100020

为研究超临界co_(2)管道停输后管内温度压力和相态变化规律,以国内某co_(2)管道为研究对象,利用OLGA软件开展停输再启动瞬态数值模拟,探究不同工况及工质对管道停输再启动过程的影响。研究结果表明:在保证相态不变且下游用户流量不变的... 详细信息

为研究超临界co_(2)管道停输后管内温度压力和相态变化规律,以国内某co_(2)管道为研究对象,利用OLGA软件开展停输再启动瞬态数值模拟,探究不同工况及工质对管道停输再启动过程的影响。研究结果表明:在保证相态不变且下游用户流量不变的情况下,流量越大,最大停输时间越短,且管道中前部和管道高点较其他位置先出现相变;在相同工况下,h_(2)和N_(2)等非极性杂质的存在会使co_(2)的相包线向上移动,最大停输时间减少;而h_(2)S和co等极性杂质的存在会使co_(2)的相包线向下移动,最大停输时间增加;停输再启动过程中,如果所含杂质的密度小于纯co_(2)的密度,则含有该类型杂质的管道恢复稳定运行状态所需时间短于纯co_(2)工质管道。研究结果可为相关单位制定co_(2)管道设计方案和安全停输预案提供参考。

关键词： OLGA 含杂质co_(2) 停输再启动安全停输时间

长江上游典型丘陵山区坡耕地径流及氮磷碳流失特征

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环境工程技术学报 2024年第5期14卷 1589-1598页

作者：王祥陈炜黄国鲜童思陈徐向舟聂玉玺宋永会中国环境科学研究院重庆交通大学河海学院重庆文理学院化学与环境工程学院大连理工大学水利工程学院中国市政工程华北设计研究总院有限公司

持续的坡面降雨可能引发地表径流和壤中流的形成。其中,地表径流可通过溶蚀、侵蚀、运输等方式将大量富集在表土(通常为0~20 mm厚度)的养分从土壤中转移到受纳环境。降雨强度和坡度的变化可以影响坡面径流强度,从而改变径流中总氮(TN)... 详细信息

持续的坡面降雨可能引发地表径流和壤中流的形成。其中,地表径流可通过溶蚀、侵蚀、运输等方式将大量富集在表土(通常为0~20 mm厚度)的养分从土壤中转移到受纳环境。降雨强度和坡度的变化可以影响坡面径流强度,从而改变径流中总氮(TN)、总磷(TP)、溶解性有机碳(DOC)等养分浓度与通量过程。通过模拟降雨试验,设置3种典型降雨强度(40、60、90mm/h)和坡度(6°、12°、18°),探讨不同条件下丘陵山区紫色土坡面径流及坡面TN、TP、DOC流失特征。结果表明:1)产流临界坡度不是一个定值,降雨强度在60 mm/h及以下时,临界坡度介于6°~18°;降雨强度达到90 mm/h时,未出现明显的临界坡度。2)相同降雨强度下,径流中TN和DOC浓度与坡度呈正相关(18°>12°>6°);降雨强度为90 mm/h时,径流中TP浓度与坡度的关系为6°>12°>18°,其余降雨强度下,则为12°>18°>6°。除12°坡面外,DOC流失量随降雨强度增加呈上升趋势;TP最大流失量出现在90 mm/h降雨强度下的6°坡面,为0.91 mg/m^(2),表现为来源限制,其余坡度坡面的TP流失表现为携带限制。3)坡面产流量和产沙量主要受降雨强度的影响,产流量和降雨强度与径流中TP流失量和DOC流失量显著相关,坡度与碳、氮、磷流失量的相关性均不显著,径流中TN流失量与TP和DOC流失量显著相关。研究显示,高强度降雨和小坡度组合下,径流量、TP流失量、DOC流失量显著高于其余降雨强度和坡度的组合,而在高强度降雨和大坡度组合下,TN流失量达到峰值。因此,需要特别关注强降雨、小坡度下紫色土中TP、DOC流失及强降雨、大坡度下TN流失问题。

关键词：紫色土降雨强度坡度模拟降雨养分流失

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磷、氟杂质对建筑石膏性能的影响研究

现代化工 2024年第10期44卷 137-143页

作者：宋金宝梅毅夏举佩周琼波何宾宾聂云祥昆明理工大学化学工程学院云南昆明650500 云南省磷化工节能与新材料重点实验室云南昆明650500 云南磷化集团有限公司云南昆明650500

以磷石膏应用为研究目标,通过向天然石膏中添加磷酸、氟硅酸、氢氟酸、磷酸氢钙,研究水溶磷、水溶氟、共晶磷对石膏砌块物理力学性能的影响。结果表明,水溶磷、共晶磷对石膏砌块凝结时间均有缓凝作用,力学性能随添加量增加而降低;共晶... 详细信息

以磷石膏应用为研究目标,通过向天然石膏中添加磷酸、氟硅酸、氢氟酸、磷酸氢钙,研究水溶磷、水溶氟、共晶磷对石膏砌块物理力学性能的影响。结果表明,水溶磷、共晶磷对石膏砌块凝结时间均有缓凝作用,力学性能随添加量增加而降低;共晶磷的影响小于水溶磷;水溶氟缩短了砌块凝结时间,降低了力学性能;水溶磷、水溶氟的共同作用对砌块具有促凝功能,在水溶磷、水溶氟总质量分数为0.15%时,石膏砌块力学性能出现最大值;随着水溶磷、水溶氟质量分数的增加,抗折抗压呈现断崖式下降。在含有0.2%共晶磷的石膏中加入水溶磷、水溶氟时,由于水化过程中共晶磷部分转化为水溶磷,导致凝结时间延长,力学性能下降。

关键词：水溶磷水溶氟共晶磷石膏力学性能

The Chemical composition of the Field Zero-Age Star hD 77407

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Chinese Journal of Astronomy and Astrophysics 2007年第3期7卷 405-414页

作者： Xue-Liang Zhu Jian-Rong Shi Gang Zhao Ji Li Qing-Xiang nie college of Physics and Electronics Shandong Normal University Jinan 250014 National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Department of Physics Hebei Normal University Shijiazhuang 050016

high-resolution optical spectra of the zero age star hD77407 are analysed and its Li, C, O, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, co, Ni and Ba contents are determined using spectral synthesis method. The temperature of the star is determined by fitting the hα line wings. The parameters derived for this star are Teff=5900 K, log g=4.47 and [Fe/h] = ＋0.07. It is found that the derived iron content is slightly higher than what is given in the published literature. This star shows a relative overabundances of Ca and Ba, and underabundances of Na, V and Ni with respect to the solar mix. Activity of the star is indicated by the filled in hα and Ca Ⅱ triplet line cores. It has been confirmed that our spectroscopic approach yields fairly reliable and consistent results for active stars.

关键词： stars abundances- stars ZAMS - stars individual hD77407

Insights into biobased epoxidized fatty acid isobutyl esters from biodiesel:Preparation and application as plasticizer

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Chinese Journal of Chemical Engineering 2022年第4期35卷 41-50页

作者： Xiaojiang Liang Fengjiao Wu Qinglong Xie Zhenyu Wu Jinjin Cai congwen Zheng Junhong Fu Yong nie Biodiesel Engineering Lab of China Petroleum&Chemical Industry Federation and Zhejiang Province Key Lab of BiofuelZhejiang University of TechnologyHangzhou 310014China Zhejiang Jiaao Enprotech Stock co. LtdTongxiang 314000China

Biodiesel was used to prepare epoxidized fatty acid isobutyl esters(Ep-FABEs)as a biobased plasticizer in this *** of biodiesel with isobutanol catalyzed by tetrabutyl titanate was carried out in a gas-liquid tower *** conversion achieved nearly 100%within 5 h under the reaction temperature,the mass ratio of catalyst to fatty acid methyl esters(FAMEs),and isobutanol to FAMEs total molar ratio of 180℃,0.4%(mass),and 5.4:1,*** addition,kinetic model of the transesterification reaction was developed at 150–190℃.The calculated activation energy was 48.93 kJ·mol^(-1).Then,the epoxidation of obtained fatty acid isobutyl esters(FABEs)was conducted in the presence of formic acid and hydrogen *** Ep-FABEs was further analyzed for its plasticizing effectiveness to replace dioctyl phthalate(DOP)and compared with conventional epoxy plasticizer epoxidized fatty acid methyl esters(Ep-FAMEs).The results indicated that the thermal stability and mechanical properties of PVC films with Ep-FABEs plasticizer were significantly improved compared with those plasticized with *** addition,the extraction resistance and migration stability of Ep-FABEs were better than those of ***,the prepared Ep-FABEs via structural modification of biodiesel proved to be a promising biobased plasticizer.

关键词： Biodiesel Transesterification Isobutyl esters Epoxidized isobutyl esters Biobased plasticizer

Synthesizing an inorganic-rich solid electrolyte interphase by tailoring solvent chemistry in carbonate electrolyte for enabling high-voltage lithium metal batteries

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Journal of Energy Chemistry 2023年第7期82卷 475-483,I0010页

作者： Qiwen Ran hongyuan Zhao Jintao Liu Lei Li Qiang hu Fuquan nie Xingquan Liu Sridhar Kormarneni School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 610054SichuanChina Department of Ecosystem Science and Management and Materials Research Institute 204 Energy and the Environment LaboratoryThe Pennsylvania State UniversityUniversity ParkPA 16802USA Research Center for Electrochemistry and Energy Engineering Henan Institute of Science and TechnologyXinxiang 453003HenanChina

high-voltage(>4.0 V)lithium metal battery(LBM)is considered to be one of the most promising candidates for next-generation high-energy ***,the commercial carbonate electrolyte delivers a poor compatibility with Li metal anode,and its organic dominated solid electrolyte interphase(SEI)shows a low interfacial energy and a slow Li^(+)diffusion *** this work,an inorganic LiF-Li_(3)N rich SEI is designed to enable high-voltage LBM by introducing nano-cubic LiF and LiNO_(3)into1 M LiPF_(6)ethylene carbonate(EC)/dimethyl carbonate(DMC)(v:v=1:1)***,the unique nano-cubic structure of as-synthetized LiF particles achieves its high concentration dissolution in carbonate electrolyte to enhance the interfacial energy of *** addition,tetramethylene sulfolane(TMS)is used as a carrier solvent to dissolve LiNO_(3)in the carbonate electrolyte,thereby deriving a Li_(3)N-rich *** a result,the as-designed electrolyte shows a high average Li plating/striping CE of 98.3%after 100 cycles at 0.5 m A cm^(-2)/0.5 mA h cm^(-2).Furthermore,it also enables the ultrathin Li(~50μm)‖LiNi_(0.8)co_(0.1)Mn_(0.1)O_(2)(NCM,4.4 mA h cm^(-2))full cell to deliver a high-capacity retention of 80.4%after 100 cycles with an outstanding average CE of 99.7%.Notably,the practical application prospect of the modified electrolyte is also estimated in LiNi_(0.8)co_(0.1)Mn_(0.1)O_(2)‖Li pouch cell with an energy density of 261.2 W h kg^(-1).This work sheds light on the internal mechanism of Li^(+)transport within the inorganic dominated SEI and provides a simple approach to stabilize the high-voltage LMBs.

关键词： Li metal battery Carbonate electrolyte Nano-cubic LiF LiNO_(3) Tetramethylene sulfolane

Role of inhaled nitric oxide in treatment of neonatal pulmonary hypertension

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Acta Pharmacologica Sinica 1997年第6期18卷 62-65页

作者： Steven h ABMAN (Pediatric heart Lung Center, Department of Pediatrics, University of colorado School of Medicine and The Children s hospital, Denver, co, USA) ChILDRENS hOSP DENVER CO 80218 USA

ＲｏｌｅｏｆｉｎｈａｌｅｄｎｉｔｒｉｃｏｘｉｄｅｉｎｔｒｅａｔｍｅｎｔｏｆｎｅｏｎａｔａｌｐｕｌｍｏｎａｒｙｈｙｐｅｒｔｅｎｓｉｏｎＳｔｅｖｅｎＨＡＢＭＡＮ（ＰｅｄｉａｔｒｉｃＨｅａｒｔＬｕｎｇＣｅｎｔｅｒ，Ｄｅｐａ... 详细信息

ＲｏｌｅｏｆｉｎｈａｌｅｄｎｉｔｒｉｃｏｘｉｄｅｉｎｔｒｅａｔｍｅｎｔｏｆｎｅｏｎａｔａｌｐｕｌｍｏｎａｒｙｈｙｐｅｒｔｅｎｓｉｏｎＳｔｅｖｅｎＨＡＢＭＡＮ（ＰｅｄｉａｔｒｉｃＨｅａｒｔＬｕｎｇＣｅｎｔｅｒ，ＤｅｐａｒｔｍｅｎｔｏｆＰｅｄｉａｔｒｉｃ...

关键词： nitric oxide neonatology respiratory distress syndrome

钙结合蛋白S100A4对BCG感染ThP-1细胞自噬的调控作用

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畜牧兽医学报 2024年第1期55卷 311-322页

作者：刘悦阳李梦媛聂雪伊马亚博侯雨欣马伯利杨易徐金瑞宁夏大学西部特色生物资源保护与利用教育部重点实验室银川750021 宁夏医科大学回医药现代化教育部重点实验室银川750010

本研究旨在探究牛结核分枝杆菌减毒株卡介苗(Bacillus Calmette-Guérin,BCG)感染人单核巨噬细胞ThP-1后,钙结合蛋白S100A4对细胞自噬的调控作用。以感染复数为10∶1的BCG感染ThP-1细胞不同时间,用Western blot检测S100A4和LC3Ⅱ的表达... 详细信息

本研究旨在探究牛结核分枝杆菌减毒株卡介苗(Bacillus Calmette-Guérin,BCG)感染人单核巨噬细胞ThP-1后,钙结合蛋白S100A4对细胞自噬的调控作用。以感染复数为10∶1的BCG感染ThP-1细胞不同时间,用Western blot检测S100A4和LC3Ⅱ的表达,以确定最佳感染时间,并采用透射电镜观察自噬体数量变化。在BCG单独感染或与S100A4小干扰RNA共处理ThP-1细胞12 h后,采用qRT-PCR检测S100A4及自噬相关因子--微管相关蛋白轻链3II (microtubule-associated protein light chain 3Ⅱ, LC3Ⅱ)、自噬相关蛋白7(autophagy-related gene 7, Atg7)、Beclin-1在mRNA水平上的表达,采用Western blot检测S100A4、LC3Ⅱ、Atg7、Beclin-1在蛋白水平的表达。利用mRFP-GFP-LC3检测自噬流,激光共聚焦显微镜观察细胞中mRFP-LC3和mRFP-GFP-LC3点状聚集。结果显示:在BCG感染ThP-1细胞不同时间后,S100A4和LC3Ⅱ在蛋白表达水平随感染时间的延长先上升后下降,在12 h时表达最高(PhP-1细胞自噬。

关键词：结核分枝杆菌细胞自噬 S100A4 ThP-1细胞