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KF-AlF_(3)熔盐低温可视化电解NEU-1月壤仿真样

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过程工程学报 2024年第8期24卷 972-981页

作者：李承放刘爱民谢开钰李得天何成旦王琎王永军石忠宁东北大学多金属共生矿生态化冶金教育部重点实验室辽宁沈阳110819 兰州空间技术物理研究所真空技术与物理重点实验室甘肃兰州730000

以57Fe-43Ni合金为惰性阳极、以镍网为阴极并用于盛装月壤仿真样,在650℃的43KF-57AlF_(3)电解质体系中电解NEU-1月壤仿真样。利用透明槽可视化观察了电解过程中电极反应现象,并通过X-射线衍射(XRD)、能谱分析(EDS)和红外在线检测仪分... 详细信息

以57Fe-43Ni合金为惰性阳极、以镍网为阴极并用于盛装月壤仿真样,在650℃的43KF-57AlF_(3)电解质体系中电解NEU-1月壤仿真样。利用透明槽可视化观察了电解过程中电极反应现象,并通过X-射线衍射(XRD)、能谱分析(EDS)和红外在线检测仪分别对电解质、阴极产物和阳极气体进行了表征。研究发现,在电解过程中电解质呈现三种不同颜色层,上层电解质为黄棕色,其冷凝后物相是KAlF_(4)和Fe_(3)O_(4);中层侧部为透明电解质,中心区域呈黑色,冷凝后物相为SiO_(2),NiO和Fe-Ni,在中层侧部还发现有少量Fe_(3)O_(4)和Al-Fe合金;下层呈蓝紫色,主要物相为Al,Al_(2)O_(3)和Fe-Ni-Si-Ti合金;阴极附近有小颗粒金属产物,阴极镍网外表面样品的主要成分为Fe(35.09wt%),还含有少量的Ti(1.06wt%),Al(9.38wt%)和Si(3.62wt%);电解过程中阳极底掌持续生成氧气,电解2 h后产生的气体中氧气的体积分数稳定在95vol%。

关键词：月壤原位资源利用熔盐电解惰性阳极冰晶石

Hot deformation behavior and finite element simulation of Mg-8.3Gd-4.4Y-1.5Zn-0.8Mn alloy

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Journal of Rare Earths 2022年第5期40卷 831-839,I0006页

作者： Jiabin Fan Minglong Ma Kui Zhang yongjun Li Xinggang Li Guoliang shi Jiawei Yuan State Key Laboratory of Nonferrous Metals and Process GRINM Co.Ltd..Beijing 100088China GRIMAT Engineering Institute Co.Ltd Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China

To study the hot deformation behavior of Mg-8.3 Gd-4.4 Y-1.5 Zn-0.8 Mn(wt%) alloy,hot compression tests were conducted using a Gleeble-3500 thermal simulator at temperatures ranging from 653 to773 K,true strain rates of 0.001-1 s^(-1),and a deformation degree of 60%.Results of hot compression experiments show that the flow stress of the alloy increases with the strain *** true stress-true strain curves are corrected by correcting the effect of temperature rise in the deformation *** energy,Q,equal to 287380 J/mol and material constant,n,equal to 4.59 were calculated by fitting the true stress-true strain ***,the constitutive equation was established and verified via finite element *** of the hot processing map show that the probability of material instability increases with the degree of deformation,which indicates that the material is not suitable for large deformation in a single *** the whole,the alloy is appropriate for multipass processing with small deformation and a suitable processing temperature and strain rate are 733 K and 0.01 s-1,respectively.

关键词： Mg-Gd-Y-Zn-Mn alloy Hot deformation Constitutive relationship Finite element simulation Processing map Rare earths

单中心腹膜透析相关性真菌性腹膜炎临床和预后分析

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国际医药卫生导报 2014年第5期20卷 596-599页

作者：林克宣黄成文吴勇石咏军刘冠贤钟伟强惠州市中心人民医院肾内科 516001

目的探讨腹膜透析相关性真菌性腹膜炎（PDFP）的易感因素、诊治和预后，以提高真菌性腹膜炎的诊治水平。方法回顾性分析惠州市中心人民医院腹膜透析中心2005年1月至2013年8月25例PDFP病例，分析患者的临床资料、病原体、治疗、预后。结... 详细信息

目的探讨腹膜透析相关性真菌性腹膜炎（PDFP）的易感因素、诊治和预后，以提高真菌性腹膜炎的诊治水平。方法回顾性分析惠州市中心人民医院腹膜透析中心2005年1月至2013年8月25例PDFP病例，分析患者的临床资料、病原体、治疗、预后。结果PDFP占腹膜透析相关性腹膜炎的比例是7．89％；PDFP发生前4周使用过抗生素13例（52％）；14例（56％）拔管后改为长期血液透析，死亡11例（44％）；死亡组与存活组在糖尿病、血液透析、10d内拔管方面差异有统计学意义（P〈0．05）。结论使用抗生素是PDFP发生的危险因素，PDFP预后不良，确诊后早期拔管可降低死亡率。糖尿病、血液透析、10d内拔管是影响患者预后的因素。

关键词：腹膜透析腹膜炎真菌

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惠州地区肾活检患者的流行病学分析

医学研究杂志 2014年第5期43卷 148-152页

作者：林克宣刘冠贤吴勇黄成文石咏军钟伟强广东省惠州市中心人民医院肾内科 516001

目的了解惠州地区肾活检病例流行病学情况,提高本地区慢性肾脏病诊治水平。方法回顾性分析了惠州地区肾活检病例的病理类型构成情况,分析病理类型与性别、年龄的关系。结果肾活检病例共309例,原发性肾小球疾病(PGN)250例(80.9%),继发性... 详细信息

目的了解惠州地区肾活检病例流行病学情况,提高本地区慢性肾脏病诊治水平。方法回顾性分析了惠州地区肾活检病例的病理类型构成情况,分析病理类型与性别、年龄的关系。结果肾活检病例共309例,原发性肾小球疾病(PGN)250例(80.9%),继发性肾小球疾病(SGN)58例(18.8%),肾小管间质疾病1例(0.3%)。PGN中前3位病理类型是IgA肾病(IgAN)、微小病变、膜性肾病(MN),SGN中前3位病理类型是狼疮性肾炎、乙肝病毒相关性肾炎、过敏性紫癜性肾炎和糖尿病肾病。MN占PGN的比例(20.0%)明显高于国内文献报告,与国内文献比较其差异有统计学意义(P<0.05)。PGN以男性多见,SGN以女性多见,PGN和SGN的高发人群均为青年人。结论惠州地区PGN以IgAN最常见。MN占PGN比例明显高于国内文献报告,这是本地区肾活检病例最突出流行病学特点。

关键词：肾活检流行病学肾脏病理

Hot Deformation Behavior of AZ40 Magnesium Alloy at Elevated Temperatures

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Journal of Wuhan University of Technology(Materials Science) 2017年第6期32卷 1470-1475页

作者：赖林张奎 MA Minglong LI Xinggang LI yongjun shi Guoliang YUAN Jiawei State Key Laboratory for Fabrication and Processing of Nonferrous Metals Beijing General Research Institute for Nonferrous Metals

Hot compression tests on AZ40 magnesium alloy were conducted on a Gleeble 1500 d hot simulation testing machine in a deformation temperature range of 330 ℃-420 ℃ and a strain rate range of 0.002-2 s^-1. Hot deformation behaviors were investigated on the basis of the analysis of the flow stressstrain curves, constitutive equation, and processing map. The stress exponent and apparent activation energy were calculated to be 5.821 and 173.96 k J/mol, respectively. Deformation twins and cracks located in grain boundaries were generated at 330 ℃ and 0.02 s^-1, which are associated with a high strain rate and a limited number of available slip systems. With increasing temperature and decreasing strain rate, the twins disappeared and the degree of dynamic recrystallization increased. The alloy was completely dynamically recrystallized at 420 ℃ and 0.002 s^-1, with a homogenous grain size of approximately 13.7 μm. The instability domains of the deformation behavior can be recognized by processing maps. By considering the processing maps and characterizing the microstructure, the optimum hot deformation parameters in this experiment were determined to be 420 ℃ and 0.002 s^-1.

关键词： AZ40 magnesium alloy hot compression processing map recrystallization

基于因子分析法的电子式电压互感器误差状态在线评估

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现代电子技术 2023年第6期46卷 123-128页

作者：石永军杨明泽贠振兴李青宏李昊洋兰芳国网甘肃省电力公司金昌供电公司甘肃金昌737100 湖南工业大学计算机学院湖南株洲412007 三峡大学电气与新能源学院湖北宜昌443002

电子式电压互感器由于结构复杂且工作环境恶劣,长时间运行后精度会大幅降低,影响电力系统的安全可靠性和电能贸易交易的公平性。针对传统的离线校验方法长时间停电需要标准互感器的缺点,文中提出一种基于因子分析法的电子式电压互感器... 详细信息

电子式电压互感器由于结构复杂且工作环境恶劣,长时间运行后精度会大幅降低,影响电力系统的安全可靠性和电能贸易交易的公平性。针对传统的离线校验方法长时间停电需要标准互感器的缺点,文中提出一种基于因子分析法的电子式电压互感器误差状态在线评估方法。利用SPSS软件实现KMO检验和Bartlett球形检验,验证三相电子式电压互感器的二次输出数据适用于因子分析。在系统正常运行下实现模型训练,利用因子算法分离出特殊因子电子式电压互感器误差信号,建立特殊因子的Q统计量阈值;通过计算Q统计量的变化实现误差状态检测,通过Q统计量的贡献率实现三相电子式电压互感器异常准确定位。试验结果表明,所提方法可实现电子式电压互感器计量误差0.1%的在线评估,满足传统定期离线校验0.2级计量精度的评估标准,可为互感器在线监测提供新思路。

关键词：电子式电压互感器误差状态 KMO检验 Bartlett球形检验因子分析 Q统计量 SPSS统计软件在线评估

Microstructure evolution,mechanical properties and creep mechanisms of Mg-12Gd-1MM-0.6Zr(wt%)magnesium alloy

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Journal of Rare Earths 2021年第5期39卷 600-608页

作者： Bibo Li Kui Zhang Guoliang shi Kaikun Wang yongjun Li Xinggang Li Minglong Ma Jiawei Yuan State Key Laboratory of Nonferrous Metals and Process GRINM Group Co.Ltd.(GRINM)Beijing 100088China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China

In this research,the microstructure evolution,mechanical properties,and creep mechanisms of Mg-12 Gd-1 MM-0.6 Zr(wt%)alloy under different conditions were systematically studied using scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),and tensile creep *** the microstructure of the as-cast sample,the average grain size is about 42μm,and the eutectic compounds were determined to be Mg_(5)(Gd_(0.8)MM_(0.2)).During homogenization,these eutectic compounds gradually dissolve,and Mg_(12)MM particles are *** hot extrusion,complete dynamic recrystallization(DRX)occurs,resulting in equiaxial grains with an average grain size of about 12μm and the formation of streamlines consisting of Mg_(12)MM particles along the extrusion direction(ED).After T5 treatment(225℃for 7 h),a large number ofβ'(Mg_(7)Gd)phases are precipitated on the{11-20}αhabit plane and are interconnected,forming an interlaced network *** ultimate tensile strength(R_(m)=405 MPa)and yield strength(R_(P0.2)=288 MPa)of the T5 sample are significantly higher than those of the as-extruded sample(R_(m)=289 MPa,R_(P0.2)=185 MPa),but the elongation(A=4%)was remarkably lower than that of the as-extruded sample(A=18%).When crept at225℃under 100 MPa,the steady-state creep rates of the as-cast,as-extruded,and T5 samples are1.59×10^(-8),1.08×10^(-8),and 1.40×10^(-8)s^(-1),respectively,and their total strains within 100 h are respectively breaking,0.81%,and 0.92%,indicating that the as-extruded alloy exhibits the best creep *** analysis reveals that,during the creep process of the T5 sample,theβ'particles coarsen and the precipitate-free zones(PFZs)widen,which increase the steady-state creep rate and the total strain within 100 h as compared with the as-extruded sample.

关键词： Magnesium alloy Extrusion Creep mechanism Microstructure evolution Precipitation Rare earths

基于多元统计分析的茄衣烟叶生产气候资源配置

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华中农业大学学报 2024年第3期43卷 167-175页

作者：刘勇军邢卓冉时向东丁松爽刘旭东罗小红欧波涛湖南省烟草科学研究所长沙410004 河南农业大学烟草行业烟草栽培重点实验室郑州450002 湖南省烟草公司怀化市公司麻阳苗族自治县分公司麻阳419400 湖南省烟草公司怀化市公司怀化418000

为探究茄衣烟叶生产中的气候资源配置情况,以“云雪1号”品种为试验材料,通过调整移栽期以改变烟株生育期内的气候指标,采用多元统计分析法研究茄衣烟叶的气候资源配置及其对烟株农艺性状及发酵后烟叶化学成分的影响。相关性分析结果显... 详细信息

为探究茄衣烟叶生产中的气候资源配置情况,以“云雪1号”品种为试验材料,通过调整移栽期以改变烟株生育期内的气候指标,采用多元统计分析法研究茄衣烟叶的气候资源配置及其对烟株农艺性状及发酵后烟叶化学成分的影响。相关性分析结果显示,烟株大田期的积温、≥10℃有效积温、总降水量与总温差对烟株农艺性状各指标的影响较大,其相关系数分布范围为0.478~0.939,而积温、≥10℃有效积温、平均气温对烟叶总糖、烟碱、总氮、蛋白质含量影响较大,其相关系数分布范围为-0.955~-1.000。采用因子分析的方法在8项气候指标中提取出气候积累因子与湿度因子2个主因子,进一步通过灰色关联分析得出上述二者分别是影响烟株农艺性状和烟叶常规化学成分的主因子。以上结果表明,确定茄衣烟株移栽期的主要气候因子依据为大田生育期的气温、降水量和相对湿度的综合配置。

关键词：气候资源配置茄衣烟叶多元统计分析因子分析灰色关联度分析

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The Inhibitory Effects of PSS-Loaded Nanoparticles on the Dysfunction of Cardiac Microvascular Endothelia in Rats with Diabetic Cardiomyopathy

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Journal of Ocean University of China 2019年第1期18卷 253-259页

作者： AN Nina YU Luyan HU Yi FENG Wenjing shi Shujuan CHEN Honghua MAO yongjun Department of Geriatrics the Affiliated Hospital of Qingdao University

Propylene glycol alginate sodium sulfate-loaded nanoparticles(PSS-NP) has been shown potential to prevent the microvascular endothelial injuries caused by diabetic cardiomyopathy(DCM). In this study, we aimed to investigate the effects of PSS-NP on the dysfunction of cardiac microvascular endothelia in streptozotocin(STZ)-induced DCM rat model. Echocardiographic measurements showed a significant improvement of cardiac function in the PSS-NP-treated group. Our results revealed that the abnormalities of cardiac systolic and diastolic functions were suppressed by the treatments of prostaglandin E1(PGE1), low molecular weight heparin(LMWH), PSS and PSS-NP. Our comparison analysis indicated that PSS-NP showed the strongest inhibitory effects on microvascular endothelial injuries. Transmission electron microscopy analysis demonstrated that PSS-NP protected the cardiac microvascular endothelium and further improved endothelium dysfunction in DCM rats. ELISA and Western blot assays further showed a high efficiency of improving cardiac microvascular endothelial dysfunction with PSS-NP. Our results demonstrated that PSS-NP increased the protein expression of phosphatidylinositol 3-kinase(PI3K)-p85 and vascular endothelial growth factor(VEGF)-A, and the phosphorylation of protein kinase B(Akt) and endothelial nitric oxide synthase(eNOS), which were involved in the amelioration of cardiac microvascular endothelial dysfunction. These data suggest that PSS-NP may be a novel approach to the treatment the coronary microcirculation disorder diseases such as DCM.

关键词： PSS-loaded nanoparticles marine drug DCM microvascular endothelial dysfunction