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Effect of copper on edge cracking behavior and microstructure of rolled austenitic stainless steel plate

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Journal of Iron and Steel Research(International) 2022年第2期29卷 281-294页

作者： Guang-hui Zhao jian Zhang Juan li hua-ying li Hai-tao liu li-feng ma School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Shanxi Provincial Key Laboratory of Metallurgical Device Design Theory and Technology Taiyuan030024ShanxiChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina

Cu is known to affect the edge cracking characteristics of austenitic stainless steel as it causes *** hot rolling test of four kinds of austenitic stainless steel with different copper content(0,2.42,3.60 and 4.35 wt.%)was carried out to examine the effect of hot rolling cracks on steel containing different copper *** evolution of crack and microstructure was analyzed using the scanning electron microscope,energy-dispersive spectrometer,electron back scattered diffraction and transmission electron *** results showed an upward trend in edge cracking degree when Cu content was 4.35%,and the crack extended from the edge of the steel plate to the middle by about 14 ***,severe oxidation was observed inside the crack by *** the increase in copper content at 1250℃,the content of{110}brass and{112}copper textures *** the content of copper was 4.35%,the decrease was most significant,and{112}copper texture content decreased to only 0.5%.Generally,the textures of 2.42%Cu and 3.60%Cu 304L steel changed little,while a large change in the texture of 4.35%Cu 304L steel was *** conclude,the increase in rolling temperature can prevent edge crack and its propagation effectively.

关键词： Austenitic stainless steel Copper Edge crack Microstructure Ferrite

超声对低水温SBR污泥性能及群体感应的影响

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中国给水排水 2024年第1期40卷 76-81页

作者：陶艺员建马华继李道甲王美丽史新盼冯家举天津城建大学环境与市政工程学院天津300384 天津市水质科学与技术重点实验室天津300384 天津城建大学基础设施防护和环境绿色生物技术国际联合研究中心天津300384 上海洗霸科技股份有限公司上海200437 天津城市道路管网配套建设投资有限公司天津300381

通过建立连续流超声调控低水温SBR系统,分析超声调控对低水温活性污泥性能及群体感应的影响。结果表明,在15℃低水温条件下,超声调控SBR系统的污泥产率系数(Yobs)降低至0.306 kgVSS/kgCOD,污泥减量率(SRE)为44.77%。超声调控并不影响活... 详细信息

通过建立连续流超声调控低水温SBR系统,分析超声调控对低水温活性污泥性能及群体感应的影响。结果表明,在15℃低水温条件下,超声调控SBR系统的污泥产率系数(Yobs)降低至0.306 kgVSS/kgCOD,污泥减量率(SRE)为44.77%。超声调控并不影响活性污泥的正常沉降和系统的稳定运行,系统污泥容积指数(SVI)为121.2~148.0 mL/g,COD去除效果稳定,出水COD可达22 mg/L。活性污泥胞外聚合物(EPS)含量升高,多糖和蛋白质含量分别升至74.71和29.23 mg/gMLSS,提高了63.2%和36.8%。超声调控对活性污泥信号分子浓度有较大影响,C4-HSL浓度为0.1966μg/L,单位质量污泥的信号分子含量为0.044μg/gMLSS,分别为对照反应器的2.56和2.44倍。超声调控还导致C6-HSL、C7-HSL、C8-HSL、C10-HSL、C12-HSL和C14-HSL等信号分子浓度显著降低。

关键词：超声低水温污泥性能群体感应

One-year status of hepatic venous pressure gradient measurement from 85 hospitals in China

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Portal Hypertension & Cirrhosis 2024年第2期3卷 116-123页

作者： Jitao Wang Ting Cui linpeng Zhang Zhiping Yan Lei li jinjun Chen Junhui Sun hua Xiang He Zhu Hao Wu jiancuo Gengzang feng Zhang Wei Wu Guohong Cao Wuhua Guo Haibin Shi Hui Xue Guangjun huang Qiang Yu Meng Niu Huiling Xiang Derun Kong Wei Gou Xuefeng Luo Fuliang He Min Yuan Wei liu Yong Wang Hongjie Hu Xiaoli Zhu Tao Yu Qinxue Sun Wei Qu Ting Lu Deqiang ma li Zhang Jun ma Jun Yang Ketao Mu Xiaoliang Zhu Kai Xiong Huiguo Ding Shengjuan Yao Mingsheng huang Fang Wang Zexin Wang Yong huang jianan li Hongfeng Yi Birun huang Zhongwei Zhao Duiping feng Yanming Lei Changlong Hou Wenbo Guo Shirong liu Gaojun Teng Kangshun Zhu Fan Wu Xiaogang Hu Wenfeng Zhang Shaoqi Yang Zhouchao Hu Pengfei Pang Shaowu Zhuang Weidong Wang Qingliang Zhu Kunpeng Zhang Chengyu liu Dongliang li Chao ma Hong jiang Xingong Zhao Weixin Ren Zhiwei Wang Lei Yu Fuhuang lin Chaoguang Yan feng Wang Lei Yu Hui huan Wenyong Shen Shaofei He Chengda Zhang jinlun Bao jiangtao liu Jun Wu jianbo Zhao jian Zhang Xiaolong Qi Hebei Provincial Key Laboratory of Cirrhosis&Portal Hypertension Xingtai People's HospitalXingtaiHebeiChina Center of Portal Hypertension Department of RadiologyZhongda HospitalSchool of MedicineSoutheast UniversityNanjingJiangsuChina Department of Interventional Therapy Beijing Shijitan Hospital Affiliated to Capital Medical UniversityBeijingChina Department of Intervention Taiyuan Third People's HospitalTaiyuanShanxiChina Department of Intervention Zhongshan Hospital Affiliated to Fudan UniversityShanghaiChina Department of Interventional Medicine The First Hospital of Lanzhou UniversityLanzhouGansuChina Department of Infectious Diseases Nanfang Hospital of Southern Medical UniversityGuangzhouGuangdongChina Hepatobiliary and Pancreatic Intervention Center The First Affiliated Hospital of Zhejiang University School of MedicineHangzhouZhejiangChina Interventional Vascular Surgery Hunan Provincial People's HospitalChangshaHunanChina Department of Intervention Sixth People's Hospital of ShenyangShenyangLiaoningChina Department of Gastroenterology West China Hospital of Sichuan UniversityChengduSichuanChina Department of Intervention The Fourth People's Hospital of Qinghai ProvinceXiningQinghaiChina Department of Gastroenterology Nanjing Drum Tower HospitalNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiangChina Department of Radiology Shulan(Hangzhou)HospitalHangzhouZhejiangChina Department of Intervention Mengchao Hepatobiliary Hospital of Fujian Medical UniversityFuzhouFujianChina Department of Interventional Radiology The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Gastroenterology The First Affiliated Hospital of Xi'an Jiaotong UniversityXi'anShaanxiChina Department of Gastroenterology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinanShandongChina Department of Interventional Radiology Fifth Medical Center

Aims:Surveys and research on the applications of the hepatic venous pressure gradient(HVPG)are important for understanding the current status and future development of this technology in *** article aimed to investigate the status of hepatic venous pressure gradient measurement in China in ***:We investigated the overall status of HVPG technology in China-including hospital distribution,hospital level,annual number of cases,catheters used,average cost,indications,and current challenges by using online *** counting the number and percentages of cases of these results,we hope to clarify the current status of HVPG measurements in ***:According to the survey,85 hospitals in China used HVPG technology in 2022 distributed across 29 provinces.A total of 4989 HVPG measurements were performed in all of the surveyed hospitals in 2022,of which 2813 cases(56.4%)were measured *** average cost of HVPG measurement was 5646.8±2327.9 *** the clinical teams who performed the measurements(sometimes multiple per hospital),94.3%(82/87)used the balloon method,and the majority of the teams(72.4%,63/87)used embolectomy ***:This survey clarified the clinical application status of HVPG in China and confirmed that some medical institutions in China have established a foundation for this *** is still necessary to continue promoting and popularizing this technology in the future.

关键词： application status hepatic vein pressure gradient questionnaire survey

Electrolyte perspective on stabilizing liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode for lithium-ion batteries

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稀有金属：英文版 2023年第2期42卷 387-398页

作者： Xiao-feng Zhu Xiu li Tian-Quan liang Xin-hua liu jian-Min ma School of Resources Environment and MaterialsGuangxi UniversityNanning530004China School of materials and Energy University of Electronic Science and Technology of ChinaChengdu611731China School of Transportation Science and Engineering Beihang UniversityBeijing102206China

Nickel-rich liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)is regarded as the promising cathode for lithium-ion batteries(liBs).However,the challenges such as safety issues and poor cycling performance have seriously hindered its commercial *** order to overcome these difficulties,there has been extensive research and development of electrolyte modifications for high-energy-density liBs with Ni-rich ***,this review introduces the research progress based on solvent additives,salt type additives and other electrolytes for liBs with NCM811cathode materials and discusses how they control the interface *** particular,some recommendations for further modification of enhancing electrolyte stability and improving NCM811 electrochemical properties are summarized and proposed,which put forward new design rules for the screening and customizing ideal electrolyte additives for high performance NCM811 cathode-based liBs.

关键词： Nickel-rich liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811) Interface Electrolyte additives Cathode electrolyte interphase(CEI) Electrolyte

Factors influencing oil recovery by surfactant-polymer flooding in conglomerate reservoirs and its quantitative calculation method

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Petroleum Science 2022年第3期19卷 1198-1210页

作者： feng-Qi Tan Chun-Miao ma jian-hua Qin Xian-Kun li Wen-Tao liu College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing100049China Key Laboratory Computational Geodynamics Chinese Academy of SciencesBeijing100049China Xinjiang Oilfield Company PetroChinaKaramayXinjiang834000China

This study aims to clarify the factors influencing oil recovery of surfactant-polymer(SP)flooding and to establish a quantitative calculation model of oil recovery during different displacement stages from water flooding to SP *** conglomerate reservoir of the Badaowan Formation in the seventh block of the Karamay Oilfield is selected as the research object to reveal the start-up mechanism of residual oil and determine the controlling factors of oil recovery through SP flooding experiments of natural cores and microetching *** experimental results are used to identify four types of residual oil after water flooding in this conglomerate reservoir with a complex pore structure:oil droplets retained in pore throats by capillary forces,oil cluster trapped at the junction of pores and throats,oil film on the rock surface,isolated oil in dead-ends of flow *** the four types of residual oil identified,the SP solution can enhance oil recovery by enlarging the sweep volume and improving the oil displacement ***,the viscosity-increasing effect of the polymer can effectively reduce the permeability of the displacement liquid phase,change the oil-water mobility ratio,and increase the water ***,the stronger the shear drag force of the SP solution,the more the crude oil in a porous medium is ***,the surfactant can change the rock wettability and reduce the absorption capacity of residual oil by lowering interfacial *** the same time,the emulsification further increases the viscosity of the SP solution,and the residual oil is recovered effectively under the combined effect of the above two *** the four start-up mechanisms of residual oil identified after water flooding,enlarging the sweep volume and improving the oil displacement efficiency are interdependent,but their contribution to enhanced oil recovery are *** SP flooding system primarily enlarges the sweep volume by increasing viscos

关键词： Conglomerate reservoir Water flooding Surfactant-polymer flooding Residual oil type Influencing factor Enhanced oil recovery Computational model

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复杂地形对山西省区域性暴雨的数值模拟试验

水电能源科学 2024年第1期42卷 1-4,9页

作者：靳泽辉周建琨马丽张永瑞梁桂花山西省五台山气象站山西忻州035515 中国气象局五台山云物理野外科学试验基地山西忻州035515 朔州市气象局山西朔州036002 晋中市气象局山西晋中030600 山西省气象灾害防御技术中心山西太原030012 朔城区气象局山西朔州036002

为探究山西省复杂地形对暴雨的影响,利用中尺度天气模式WRF对2013年7月9~10日山西省特大暴雨天气过程进行模拟分析,基于山西省地形设计了3组地形敏感性试验,分析了地形对此次极端强降水的影响。结果表明,山西省复杂地形对暴雨特征(暴雨... 详细信息

为探究山西省复杂地形对暴雨的影响,利用中尺度天气模式WRF对2013年7月9~10日山西省特大暴雨天气过程进行模拟分析,基于山西省地形设计了3组地形敏感性试验,分析了地形对此次极端强降水的影响。结果表明,山西省复杂地形对暴雨特征(暴雨中心、暴雨强度)影响非常显著,当增高地形后,暴雨中心的垂直螺旋度大值区的区域明显变大,扰动位温大值区向东偏移,山西省南部水汽辐合增强,而当地形降低后,垂直螺旋度则明显缩小甚至消失,扰动位温也明显降低,中部水汽辐合增强。并结合动力条件、热力条件和水汽条件,阐述了山西省地形对暴雨发展过程的影响。

关键词：山西省数值模拟地形暴雨敏感试验

Plasmonic Core-Shell Nanostructures Enhanced Spectroscopies

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Chinese Journal of Chemistry 2022年第3期40卷 392-406页

作者： Jun Zhou Di-Ye Wei Yu-jin Zhang hua Zhang jian-feng li State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringCollege of MaterialsCollege of EnergyFujian Key Laboratory of Advanced MaterialsXiamen UniversityXiamenFujian 361005China College of Optical and Electronic Technology China Jiliong UniversityHangzhouZhejiang 310018China

Core-shell nanostructures constituted by a plasmonic core and an ultrathin shell have drawn enormous attentions in enhanced spectroscopies,catalysis,energy,and other fields because of their splendid properties such as multifunctionality,stability,and *** this article,we summarized the endeavors made by our group in the past decade about the core-shell nanostructures in the shell-isolated nanoparticle-enhanced Raman spectroscopy(SHINERS)and plasmon-enhanced ***,the potential challenges and perspectives about core-shell nanostructures in spectroscopies have also been ***,we believe this article would provide an avenue for a comprehensive understanding of enhanced spectroscopies with core-shell nanostructures.

关键词： Raman spectroscopy Nanostructures Electrochemistry Heterogeneous catalysis In-situ characterization

基于SNP标记的小麦品种遗传相似度及其检测准确度分析

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作物学报 2024年第4期50卷 887-896页

作者：许乃银金石桥晋芳刘丽华徐剑文刘丰泽任雪贞孙全许栩庞斌双江苏省农业科学院经济作物研究所江苏南京210014 全国农业技术推广服务中心北京100125 北京市农林科学院杂交小麦研究所北京100097

遗传相似度检测的准确度估计是对SNP标记法在农作物品种检测体系中应用的必要补充和完善。本研究基于2021年小麦品种SNP标记法跨实验室协同验证实验数据,分析了该方法的检测准确度及在品种间的遗传相似度。分析结果表明:(1)10个实验室... 详细信息

遗传相似度检测的准确度估计是对SNP标记法在农作物品种检测体系中应用的必要补充和完善。本研究基于2021年小麦品种SNP标记法跨实验室协同验证实验数据,分析了该方法的检测准确度及在品种间的遗传相似度。分析结果表明:(1)10个实验室对55组小麦品种组合的标记位点相似度检测的总体准确度约为98%。(2)GGE双标图的品种遗传关系功能图显示,7组小麦品种的组内遗传相似度在95%以上,其余组合的遗传相似度较低。(3)依据GGE双标图的“正确度-精确度”功能图和“准确度排序”功能图,发现洛旱7号/洛旱11等品种组合的相似度检测准确度较高,晋麦47/临抗11的检测准确度一般,而济麦22/婴泊700的检测准确度较差。(4)10个实验室的检测准确度存在显著差异,其中2个实验室检测的正确度、精确度和准确度表现显著差于其余实验室。(5)各实验室检测正确度的容许误差分布于1.3%~1.9%之间,平均为1.5%;准确度的容许误差分布于1.5%~2.0%之间,平均为1.7%。其中,Lab2和Lab3的检测正确度和准确度的容许误差显著差于其余实验室。本研究构建了SNP标记法对品种相似性检测的准确度统计模型,分析了品种组合和实验室的检测准确度及其容许误差,采用GGE双标图方法对检测正确度、精确度和准确度进行可视化分析,验证了各实验室对品种位点相似性检测的准确度和可靠性,为SNP标记法在农作物品种遗传相似性检测中的准确度评价提供了理论支持和应用范例。

关键词：小麦(Triticum aestivum L.) GGE双标图 SNP标记遗传相似度位点相似度准确度

妊娠早期血清尿三氯生水平与妊娠28周血糖稳态的关系

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广东医学 2024年第3期45卷 335-339页

作者：乔金凤刘江华马李娜保定市第二中心医院产科河北保定072750

目的探讨妊娠早期尿三氯生(TCS)水平与妊娠28周时血糖稳态之间的关系。方法招募2019年1月至2020年6月期间在保定市第二中心医院接受产前检查的241例孕妇。研究的主要结局是在中位妊娠28周通过1 h非禁食、50 g葡萄糖负荷试验(GLT)筛查妊... 详细信息

目的探讨妊娠早期尿三氯生(TCS)水平与妊娠28周时血糖稳态之间的关系。方法招募2019年1月至2020年6月期间在保定市第二中心医院接受产前检查的241例孕妇。研究的主要结局是在中位妊娠28周通过1 h非禁食、50 g葡萄糖负荷试验(GLT)筛查妊娠期糖尿病(GDM)。在早期妊娠和中期妊娠收集尿液样本以测量尿比重(Sg),并通过在线固相萃取结合同位素稀释-高效液相色谱-串联质谱法对酚类混合物(双酚A、二苯甲酮-3和TCS)进行定量分析。结果根据GLT测试结果,199例GLT正常,其余42例异常。与GLT正常女性相比,GLT异常女性的BMI较高,总运动时间较低(P<0.05)。在早期妊娠和中期妊娠观察到TCS与妊娠血糖水平之间呈正相关(分别比较第2、第3和第4个四分位数与第1个四分位数的TCS:***=0.41,95%CI:-0.19~1.05;***=0.43,95%CI:-0.17~1.02;***=0.45,95%CI:-0.14~1.05)和中期妊娠(***=0.76,95%CI:0.19~1.32;***=0.66,95%CI:0.94~1.22;***=0.56,95%CI:0.04~1.12)。贝叶斯核机器回归(BKMR)的结果显示,早期妊娠和中期妊娠TCS与血糖水平呈正相关(P<0.05)。结论妊娠期尿TCS浓度与妊娠晚期GDM筛查试验中的血糖水平呈正相关。

关键词：妊娠早期三氯生血糖尿