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Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu wu Qi Chen Jiaxin Yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

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Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第1期68卷 257-263页

作者： Jiapian Huang Chenxin Wang Xu Wang Xiaoyu Zhou Wei Xiao Jie wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

关键词： β-chiral sulfones chiral cyclic sulfinamides sulfur dioxide insertion asymmetric radical cyclization stereoselectivity

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杜鹃红山茶在海南的扦插育苗技术管理概述

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热带林业 2013年第4期41卷 20-21页

作者：林玲陈琳陈侯鑫许晶吴钟亲海南省林业科学研究所海南海口571100

杜鹃红山茶是一个极其珍稀的山茶品种,为我国的特有植物,已被列为国家一级保护植物。该文从杜鹃红山茶扦插繁殖方式、管理、病虫害的防治等方面进行综合论述,对杜鹃红山茶在海南的扦插育苗有一定的指导意义。

关键词：杜鹃红山茶扦插繁殖管理

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Repetitive transcranial magnetic stimulation in Alzheimer’s disease:effects on neural and synaptic rehabilitation

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Neural Regeneration Research 2025年第2期20卷 326-342页

作者： Yi Ji Chaoyi Yang Xuerui Pang Yibing Yan Yue wu Zhi Geng Wenjie Hu Panpan Hu Xingqi wu Kai Wang Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders HefeiAnhui ProvinceChina Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health HefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina Department of Psychology and Sleep Medicine The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Alzheimer’s disease is a neurodegenerative disease resulting from deficits in synaptic transmission and *** Alzheimer’s disease brain tends to be hyperexcitable and hypersynchronized,thereby causing neurodegeneration and ultimately disrupting the operational abilities in daily life,leaving patients *** transcranial magnetic stimulation is a cost-effective,neuro-modulatory technique used for multiple neurological *** the past two decades,it has been widely used to predict cognitive decline;identify pathophysiological markers;promote neuroplasticity;and assess brain excitability,plasticity,and *** has also been applied to patients with dementia,because it can yield facilitatory effects on cognition and promote brain recovery after a neurological ***,its therapeutic effectiveness at the molecular and synaptic levels has not been elucidated because of a limited number of *** study aimed to characterize the neurobiological changes following repetitive transcranial magnetic stimulation treatment,evaluate its effects on synaptic plasticity,and identify the associated *** review essentially focuses on changes in the pathology,amyloidogenesis,and clearance pathways,given that amyloid deposition is a major hypothesis in the pathogenesis of Alzheimer’s *** mechanisms associated with repetitive transcranial magnetic stimulation procedures and different pathways mediating gene transcription,which are closely related to the neural regeneration process,are also ***,we discuss the outcomes of animal studies in which neuroplasticity is modulated and assessed at the structural and functional levels by using repetitive transcranial magnetic stimulation,with the aim to highlight future directions for better clinical translations.

关键词： Alzheimer’s disease amyloid deposition apoptotic mechanisms biomarker neural regeneration neurodegeneration repetitive transcranial magnetic stimulation synaptic plasticity

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Review of precipitation strengthening in ultrahigh-strength martensitic steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 256-269页

作者： Zhihao Tian Chunlei Shang Chaolei Zhang Xiaoye Zhou Honghui wu Shuize Wang Guilin wu Junheng Gao Jiaming Zhu Xinping Mao Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China Department of Materials Science and Engineering Shenzhen MSU-BIT UniversityShenzhen 518172China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China School of Civil Engineering Shandong UniversityJinan 250061China

Martensite is an important microstructure in ultrahigh-strength steels,and enhancing the strength of martensitic steels often involves the introduction of precipitated phases within the martensitic *** considerable research efforts devoted to this area,a systematic summary of these advancements is *** review focuses on the precipitates prevalent in ultrahigh-strength martensitic steel,primarily carbides(e.g.,MC,M_(2)C,and M_(3)C)and intermetallic compounds(e.g.,Ni Al,Ni_(3)X,and Fe_(2)Mo).The precipitation-strengthening effect of these precipitates on ultrahigh-strength martensitic steel is discussed from the aspects of heat treatment processes,microstructure of precipitate-strengthened martensite matrix,and mechanical ***,a perspective on the development of precipitation-strengthened martensitic steel is presented to contribute to the advancement of ultrahigh-strength martensitic *** review highlights significant findings,ongoing challenges,and opportunities in the development of ultrahigh-strength martensitic steel.

关键词： ultrahigh-strength martensitic steel precipitation strengthening mechanical property carbide intermetallic compound

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Estimation of Chloride Diffusivity in Hydrated Tricalcium Silicate Using a Hydration-Diffusion Integrated Method

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Journal of wuhan University of Technology(Materials Science) 2025年第1期40卷 49-64页

作者： WANG Xin SHEN Dejian TAO Sijie LIU Ruixin wu Shengxing College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China

This study aims to develop a chloride diffusion simulation method that considers the hydration microstructure and pore solution properties during the hydration of tricalcium silicate(C3S).The method combines the hydration simulation,thermodynamic calculation,and finite element analysis to examine the effects of pore solution,including effect of electrochemical potential,effect of chemical activity,and effect of mechanical interactions between ions,on the chloride effective diffusion coefficient of hydrated C3S *** results indicate that the effect of electrochemical potential on chloride diffusion becomes stronger with increasing hydration age due to the increase in the content of hydrated calcium silicate;as the hydration age increases,the effect of chemical activity on chloride diffusion weakens when the number of diffusible elements decreases;the effect of mechanical interactions between ions on chloride diffusion decreases with the increase of hydration age.

关键词： tricalcium silicate simulation method chloride diffusion coefficient pore solution

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桁架钢筋混凝土叠合板抗弯承载性能研究现状探析

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工程质量 2023年第8期41卷 35-39页

作者：陈哲吴仲勤尹刚张丽芳耿飞南京航空航天大学土木与机场工程系江苏南京211106 江苏宇辉住宅工业有限公司江苏泰州225500 连云港赣榆区散装水泥办公室江苏连云港222100

桁架钢筋叠合板因其兼具了预制板和现浇板的优点,在装配式建筑工程中获得了广泛应用。论文主要介绍了桁架钢筋叠合板的桁架钢筋构造要点,通过探析桁架钢筋叠合板的抗弯承载性能研究现状,指出现阶段桁架钢筋叠合板中桁架钢筋对叠合板刚... 详细信息

桁架钢筋叠合板因其兼具了预制板和现浇板的优点,在装配式建筑工程中获得了广泛应用。论文主要介绍了桁架钢筋叠合板的桁架钢筋构造要点,通过探析桁架钢筋叠合板的抗弯承载性能研究现状,指出现阶段桁架钢筋叠合板中桁架钢筋对叠合板刚度贡献问题,并提出用可拆卸桁架钢筋提高叠合板整体抗弯刚度、减小挠度变形和降低技术成本的新途径。

关键词：桁架钢筋叠合板抗弯承载性能刚度贡献挠度

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坡垒天然林下土壤养分及微生物群落分布特征

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热带林业 2017年第3期45卷 19-22页

作者：陈彧方燕山方发之吴钟亲陈修仁海南省林业科学研究所海南海口571100 海南省霸王岭林业局海南昌江572722

对尖峰岭、霸王岭坡垒分布典型区域,林下土壤养分及土壤微生物群落进行测定分析。结果表明,林下土壤含水量在8.41~18.56%间,土壤容重在1.15~1.45,土壤总空隙度在45.19~55.75之间,有机质含量在9.83~23.33g/kg间,不同海拔间差异显著,酸性... 详细信息

对尖峰岭、霸王岭坡垒分布典型区域,林下土壤养分及土壤微生物群落进行测定分析。结果表明,林下土壤含水量在8.41~18.56%间,土壤容重在1.15~1.45,土壤总空隙度在45.19~55.75之间,有机质含量在9.83~23.33g/kg间,不同海拔间差异显著,酸性土壤,pH值在4.67~5.63间;土壤全氮含量0.43~1.06g/kg间,水解性氮含量42.36~83.47mg/kg间,全磷含量0.12~0.21g/kg间,有效磷含量2.0~4.46mg/kg间,土壤全钾含量32.03~41.54g/kg间,速效钾含量61.5~81.37mg/kg间。土壤三大类微生物总数在3.72×10~7~6.47×10~7cfu·g^(-1)范围内,均表现为细菌数量>放线菌数量>真菌数量,各海拔间差异显著。

关键词：坡垒土壤养分理化性质土壤微生物

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海南保梅岭自然保护区不同类型林分土壤水文特性分析

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热带林业 2021年第1期49卷 18-22,12页

作者：陈素灵方发之吴钟亲桂慧颖王灵海南省林业科学研究院(海南省红树林研究院) 海南海口571100 海南省尖峰岭森林发展有限公司海南乐东572500

为探究保梅岭保护区内不同类型林分林下土壤水文特性,以该区域内5种典型人工纯林及天然次生林为研究对象,分土层深度测定及计算各林分土壤容重、孔隙度、贮水量等物理—水分指标。结果表明:(1)各类型林分土壤容重、贮水量、含水量、涵... 详细信息

为探究保梅岭保护区内不同类型林分林下土壤水文特性,以该区域内5种典型人工纯林及天然次生林为研究对象,分土层深度测定及计算各林分土壤容重、孔隙度、贮水量等物理—水分指标。结果表明:(1)各类型林分土壤容重、贮水量、含水量、涵蓄降水量和有效涵蓄量均随着土壤深度的增加而增大,孔隙度随土层深度加深的变化规律在各林分间表现不同。(2)6种林分土壤容重大小介于1.16g/cm^(3)~1.52g/cm^(3),以加勒比松林最大,天然次生林最小。(3)总毛管孔隙大小介于28.61%~52.54%,滞留贮水量大小介于48.24mm~147.96mm,以天然次生林最大,加勒比松林最小。(4)有效涵蓄量大小介于40.87mm~129.18mm,以天然次生林最大,桉树林最小。综合分析表明,天然次生林土壤通气透水性、贮蓄和调节水分能力优于人工纯林,而人工纯林中以枫香林涵养水源能力最佳。

关键词：林分水文特性土壤孔隙度

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退塘还林红树林混交造林技术

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林业科技通讯 2021年第2期 30-34页

作者：吴钟亲陈修仁田乐宇方发之桂慧颖海南省林业科学研究院海口571199 海南大学林学院海口570228

对海南陵水红树林国家湿地公园建设过程中的红树林退塘造林技术进行了探讨,并对红树林造林过程中的不足之处及经验进行分析,提出了相应的解决方案,总结出一套适用于红树林的多品种配置的退塘还林混交造林技术。

关键词：退塘还林红树林混交造林

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