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Critical precipitation behavior of MnTe inclusions in resulfurized steels during solidification

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1849-1857页

作者： Xiangyu Xu Lu Zhang Zifei wang Qianren Tian Jianxun Fu xuemin wang Center for Advanced Solidification Technology(CAST) School of Materials Science and EngineeringShanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Yangjiang Branch Guangdong Laboratory for Materials Science and Technology(Yangjiang)Advanced Alloys LaboratoryYangjiang 529500China

Te treatment is an effective method for modifying sulfide inclusions,and MnTe precipitation has an important effect on thermal brittleness and steel corrosion *** most actual industrial applications of Te treatment,MnTe precipitation is *** critical precipitation behavior of MnTe inclusions was investigated through scanning electron microscopy,transmission electron microscopy,machine learning,and first-principles *** preferentially precipitated at the container mouth for sphere-like sulfides and at the interface between MnS grain boundaries and steel matrix for rod-like *** MnS/MnTe interface was semicoherent.A composition transition zone with a rock-salt structure exhibiting periodic changes existed to maintain the semicoherent *** critical precipitation behavior of MnTe inclusions in resulfurized steels involved three stages at varying ***,Mn(S,Te)precipitated during ***,MnTe with a rock-salt structure precipitated from Mn(S,Te).Third,MnTe with a hexagonal NiAs structure transformed from the rock-salt *** solubility of Te in MnS decreased with decreasing *** critical precipitation behavior of MnTe inclusions in resulfurized steels was related to the MnS precipitation *** the increase in MnS precipitation temperature,the critical Te/S weight ratio *** consideration of the cost-effectiveness of Te addition for industrial production,the Te content in resulfurized steels should be controlled in accordance with MnS precipitation temperature and S content.

关键词： resulfurized steels modification of inclusion manganese telluride precipitation

Lipid phosphorylation by a diacylglycerol kinase suppresses ABA biosynthesis to regulate plant stress responses

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Molecular Plant 2024年第2期17卷 342-358页

作者： Jianwu Li Shuaibing Yao Sang-Chul Kim xuemin wang Department of Biology University of Missouri-St.LouisSt.LouisMO 63121USA Donald Danforth Plant Science Center St.LouisMO 63132USA

Lipid phosphorylation by diacylglycerol kinase(DGK)that produces phosphatidic acid(PA)plays important roles in various biological processes,including stress responses,but the underlying mechanisms remain ***,we show that DGK5 and its lipid product PA suppress ABA biosynthesis by interacting withABA-DEFICIENT2(ABA2),a key ABA biosynthesis enzyme,to negatively modulate plant responseto abiotic stress tested in Arabidopsis *** of DGK5 function rendered plants less damaged,whereas overexpression(OE)of DGK5 enhanced plant damage to water and salt *** dgk5 mutant plants exhibited decreased total cellular and nuclear levels of PA with increased levels of diacylglycerol,whereas DGK5-OE plants displayed the opposite ***,we found that both DGK5 and PA bind to the ABA-synthesizing enzyme ABA2 and suppress its enzymatic ***,the dgk5 mutant plants exhibited increased levels of ABA,while DGK5-OE plants showed reduced ABA *** addition,we showed that both DGK5 and ABA2 are detected in and outside the nuclei,and loss of DGK5 function decreased the nuclear association of *** found that both DGK5 activity and PA promote nuclear association of *** together,these results indicate that both DGK5 and PA interact with ABA2 to inhibit its enzymatic activity and promote its nuclear sequestration,thereby sup-pressing ABA production in response to abiotic *** study reveals a sophisticated mechanism by which DGK5 and PA regulate plant stress responses.

关键词： diacylglycerol kinase phosphatidic acid diacylglycerol lipid signaling stress responses lipid-protein binding protein-protein interaction Arabidopsis

Efficient and selective H_(2)O_(2)production through uranyl-assisted photocatalytic oxygen reduction reaction process in a uranium-organic framework

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Science China Chemistry 2024年第7期67卷 2274-2281页

作者： Jianxin Song Chao Liang Baoyu Li xuemin wang Min Lei Lisha Jiang Zhenyu Li Yugang Zhang Jian Xie Zuju Ma Xing Dai Yanlong wang Shuao wang Wei Liu School of Environmental and Materials Engineering Yantai UniversityYantai 264005China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China School of Life and Environmental Sciences Shaoxing UniversityShaoxing 312000China School of Nuclear Science and Technology Xi’an Jiaotong UniversityXi’an 710049China

Harnessing solar energy by photocatalytically converting oxygen and water into high-value-added H_(2)O_(2)is a promising way of alleviating both environmental and energy *** is worth noting that suppressing detrimental side reactions,such as the generation of·O_(2)^(-),is a critical approach to enhancing H_(2)O_(2)***,a 2-fold interpenetrating 3D uranium-organic framework(YTU-W-1)was developed and introduced for photocatalytic H_(2)O_(2)*** material demonstrates a different photocatalytic mechanism when employing uranyl as an initiator,as compared with the conventional semiconductor photocatalytic pathway involving photo-generated charge *** from the strong hydrogen abstraction effect of the U≡O·and the direct one-step oxygen reduction pathway,YTU-W-1 exhibits enhanced photocatalytic performance for H_(2)O_(2)production with yield efficiency of 221μmol h^(-1)g^(-1).Furthermore,YTU-W-1 displays a high H_(2)O_(2)selectivity of 68%,confirmed by rotating ring-disk electrode(RRDE)*** were used to elucidate the critical role of uranyl in the photocatalytic oxygen reduction reaction for H_(2)O_(2)*** research introduces an innovative approach to photo-driven H_(2)O_(2)production,underscoring the potential for heterogeneous catalysts to engage in photocatalytic reactions independently of photogenerated charge carriers.

关键词： uranyl metal-organic frameworks oxygen reduction reaction photocatalytic H_(2)O_(2)synthesis

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Baosteel Technical Research 2024年第1期18卷 8-13页

作者： ZHANG Yalin wang Yaojie wang xuemin Cold Rolling Plant Baoshan Iron&Steel Co.Ltd.Shanghai 201900China School of Mechanical Engineering and Automation Northeastern UniverstiyShenyang 110819China Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai 201999China

An internal defect meter is an instrument to detect the internal inclusion defects of cold-rolled strip *** detection accuracy of the equipment can be evaluated based on the similarity of the multiple detection data obtained for the same steel *** on the cosine similarity model and eigenvalue matrix model,a comprehensive evaluation method to calculate the weighted average of similarity is *** show that the new method is consistent with and can even replace artificial evaluation to realize the automatic evaluation of strip defect detection results.

关键词： internal defect inclusion similarity evaluation model repeatability detection equipment strip steel

Storage time affects the level and diagnostic efficacy of plasma biomarkers for neurodegenerative diseases

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Neural Regeneration Research 2025年第8期20卷 2373-2381页

作者： Lifang Zhao Mingkai Zhang Qimeng Li xuemin wang Jie Lu Ying Han Yanning Cai Department of Clinical Biobank Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Geriatric Medical Research Center BeijingChina Department of Neurology Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Radiology and Nuclear Medicine Xuanwu HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics BeijingChina Key Laboratory of Neurodegenerative diseases Ministry of EducationBeijingChina School of Biomedical Engineering Hainan UniversityHaikouHainan ProvinceChina Center of Alzheimer’s Disease Beijing Institute for Brain DisordersBeijingChina National Clinical Research Center for Geriatric Diseases BeijingChina Institute of Biomedical Engineering Shenzhen Bay LaboratoryGaoke Innovation CenterShenzhenGuangdong ProvinceChina Department of Neurobiology Xuanwu HospitalCapital Medical UniversityBeijingChina

Several promising plasma biomarker proteins,such as amyloid-β(Aβ),tau,neurofilament light chain,and glial fibrillary acidic protein,are widely used for the diagnosis of neurodegenerative ***,little is known about the long-term stability of these biomarker proteins in plasma samples stored at-80°*** aimed to explore how storage time would affect the diagnostic accuracy of these biomarkers using a large *** samples from 229 cognitively unimpaired individuals,encompassing healthy controls and those experiencing subjective cognitive decline,as well as 99 patients with cognitive impairment,comprising those with mild cognitive impairment and dementia,were acquired from the Sino Longitudinal Study on Cognitive Decline *** samples were stored at-80°C for up to 6 years before being used in this *** results showed that plasma levels of Aβ42,Aβ40,neurofilament light chain,and glial fibrillary acidic protein were not significantly correlated with sample storage ***,the level of total tau showed a negative correlation with sample storage ***,in individuals without cognitive impairment,plasma levels of total protein and tau phosphorylated protein threonine 181(p-tau181)also showed a negative correlation with sample storage *** was not observed in individuals with cognitive ***,we speculate that the diagnostic accuracy of plasma p-tau181 and the p-tau181 to total tau ratio may be influenced by sample storage ***,caution is advised when using these plasma biomarkers for the identification of neurodegenerative diseases,such as Alzheimer's ***,in cohort studies,it is important to consider the impact of storage time on the overall results.

关键词： Alzheimer’s disease amyloid-β diagnostic ability glial fibrillary acidic protein neurodegeneration neurofilament light chain plasma biomarkers single molecule array storage time tau

基于多层感知机的航空发动机压气机盘应力和温度预测

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航空动力学报 2024年第4期39卷 205-214页

作者：王学民徐敬沛何云中国航发四川燃气涡轮研究院成都610500

将发动机可测参数作为初始特征,利用人工神经网络技术建立航空发动机压气机盘应力和温度预测的MLP(multilayer perceptron)模型,采用BP(back propagation)神经网络算法进行训练。结果表明:该方法预测结果与传统有限元计算结果吻合较好,... 详细信息

将发动机可测参数作为初始特征,利用人工神经网络技术建立航空发动机压气机盘应力和温度预测的MLP(multilayer perceptron)模型,采用BP(back propagation)神经网络算法进行训练。结果表明:该方法预测结果与传统有限元计算结果吻合较好,相对偏差均在1%以内,判定系数达到0.95以上,方均根误差均在5以内,且计算速度由小时级提升为分秒级,可为后续工程应用提供依据。

关键词：压气机轮盘神经网络多层感知机应力温度寿命管理

百年好合:中华传统婚礼文化的传承、转化与创新研究

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社会科学战线 2024年第4期346卷 185-196页

作者：潘祥辉王学敏南京大学新闻传播学院江苏南京210023

“夫礼始于冠,本于昏”,婚礼作为中国“礼文化”之本,是个人生活的重要“过渡仪式”,既承载着儒家重伦理、循礼仪、明道德的修身之学,也寄托了人们对美好生活的殷切期盼。中华传统婚礼的仪式、程序及使用的媒介具有鲜明的民族特性,体现... 详细信息

“夫礼始于冠,本于昏”,婚礼作为中国“礼文化”之本,是个人生活的重要“过渡仪式”,既承载着儒家重伦理、循礼仪、明道德的修身之学,也寄托了人们对美好生活的殷切期盼。中华传统婚礼的仪式、程序及使用的媒介具有鲜明的民族特性,体现了中华传统礼仪文化“和谐”与“礼敬”精神以及对家庭和睦、人口繁衍的重视。传统婚礼因此成为一种具备道德约束力、认同向心力的日常礼制。近代以来,汉族传统婚礼受时代思潮、外来婚俗文化冲击而日益边缘化,直至当下,传统婚礼仪式在婚庆市场中的占比仍然不高。但毋庸置疑,传统婚礼仍旧具有生命力,其文化价值和功能在一定程度上能够规范并促进婚姻与家庭的和谐,这与中国当代的文化建设和文化传承十分契合。在互联网时代,需要对中华传统婚礼文化在观念、程序上进行创造性转化,结合数字化技术,赋予其新的时代内涵,传承好中华优秀传统文化。

关键词：传统婚礼礼文化文化传承文化传播华夏传播学

基于三维空间矢量应力场强法的SiCp/Al复合材料缺口疲劳强度预测

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航空动力学报 2024年第4期39卷 111-119页

作者：徐颖杨涛王学民崔海涛黄申南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室南京210016 中国航发四川燃气涡轮研究院成都610500

为了考虑应力梯度对SiCp/Al复合材料结构疲劳强度的影响,基于三维空间矢量应力场强法和光滑件疲劳强度,发展了一种SiCp/Al复合材料缺口疲劳强度预测方法,其中三维空间矢量应力场强法计算中分别应用了经典一维应力场强与有效距离点应力... 详细信息

为了考虑应力梯度对SiCp/Al复合材料结构疲劳强度的影响,基于三维空间矢量应力场强法和光滑件疲劳强度,发展了一种SiCp/Al复合材料缺口疲劳强度预测方法,其中三维空间矢量应力场强法计算中分别应用了经典一维应力场强与有效距离点应力场强的等效应力积分形式,避免了构建三维权函数和人为确定疲劳损伤区域。采用升降法制定了SiCp/2009Al复合材料光滑件疲劳试验方案,获得了SiCp/2009Al复合材料10^(7)循环周次对应的轴向(R=-1)疲劳强度为180.91 MPa,并以散点法开展疲劳试验获得了SiCp/2009Al疲劳寿命分布,光滑件疲劳试验结果显示SiCp/2009Al复合材料应力-寿命关系存在明显的平台区。采用逐级加载法开展了SiCp/2009Al复合材料缺口件轴向(R=-1)疲劳试验,获得了缺口件的疲劳强度为82.2 MPa。缺口件疲劳强度预测结果与试验结果吻合较好,最大误差在10%以内,其中基于有效距离点应力场强的三维空间矢量应力场强法建立的SiCp/Al复合材料缺口疲劳强度预测方法预测精度更高。

关键词： SiCp/Al复合材料疲劳强度缺口疲劳三维应力场强高周疲劳试验

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棘皮动物感觉功能及其相关受体的研究进展

海洋科学 2024年第2期48卷 102-114页

作者：刘利华王学敏陈慕雁中国海洋大学海水养殖教育部重点实验室山东青岛266003 中国海洋大学水产学院山东青岛266003

感觉系统是外界环境与有机体内在信号系统之间的“转换器”,也是生物应对外界环境变化的“哨兵”,能够敏锐捕捉外界环境信号的变化,在有机体的生长、摄食和繁殖等重要生物学过程中起到了至关重要的作用。棘皮动物具有特殊的五辐对称结构... 详细信息

感觉系统是外界环境与有机体内在信号系统之间的“转换器”,也是生物应对外界环境变化的“哨兵”,能够敏锐捕捉外界环境信号的变化,在有机体的生长、摄食和繁殖等重要生物学过程中起到了至关重要的作用。棘皮动物具有特殊的五辐对称结构,缺乏神经中枢,主要依靠散布全身的感觉系统对外界进行感知并做出响应,其关键的分类地位和独特的生物学特征为感觉系统的功能研究提供了特殊的背景。本文对棘皮动物感觉系统研究方法、不同感觉系统介导的行为特征以及相关受体发掘进行了全面综述,以期进一步解析棘皮动物感觉系统在棘皮动物特殊生理行为调控中的作用机制,为棘皮动物关键经济物种的高效绿色增养殖提供科学的理论支撑。

关键词：棘皮动物感觉系统行为响应过程受体