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Evolution of interfacial heat transfer,contact behavior and microstructure during sub-rapid solidification of molten steel with different hydrogen contents

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Journal of Iron and Steel Research International 2024年第1期31卷 215-223页

作者： Cheng lu Wan-lin Wang Chen-yang Zhu jie Zeng Xin-yuan Liu Hua-long Li School of Metallurgy and Environment Central South UniversityChangsha410083HunanChina National Center for International Research of Clean Metallurgy Central South UniversityChangsha410083HunanChina Institute of Research of Iron and Steel ShasteelZhangjiagang215625JiangsuChina

Typical Q235 low-carbon steel samples with different hydrogen contents(0.0004,0.0008,and 0.0013 wt.%)were prepared by adjusting the environment humidity and *** effects of hydrogen on interfacial heat transfer,contact behavior,and microstructure evolution were investigated using a novel droplet solidification *** results revealed that when the hydrogen content increases from 0.0004 to 0.0013 wt.%,the maximum heat flux between the molten steel and cooling substrate decreases from 8.01 to 6.19 MW/m^(2),and the total heat removed in the initial 2 s reduces from 10.30 to 8.27 MJ/m^(2).Moreover,the final contact angle between the molten steel and substrate increases from 103.741°to 113.697°,and the number of pores on the droplet bottom surface increases significantly from 21 to 210 with the increase in *** surface roughness of the droplet bottom surface increases from 20.902 to 49.181 *** addition,the average grain size of the droplet increases from 14.778 to 33.548 pm with the increase in the hydrogen *** interfacial contact condition becomes worse due to the escape of hydrogen from the steel matrix during the cooling process,which leads to the reduction in the interfacial heat transfer and the increase in the grain size.

关键词： Strip casting Hydrogen content Interfacial heat transfer behavior Contact behavior Microstructure evolution

Rotational Doppler effect of composite vortex beams with tailored OAM spectra

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Photonics Research 2024年第8期12卷 1665-1672页

作者： YUTIAN LIANG RUIJIAN LI jie ZHAO XINGYUAN lu TONG LIU ZHENGLIANG LIU YUAN REN CHENGLIANG ZHAO Department of Aerospace Science and Technology Space Engineering UniversityBeijing 101416China School of Physical Science and Technology Soochow UniversitySuzhou 215006China Department of Basic Course Space Engineering UniversityBeijing 101416China

There recently has been increasing interest in the research and application of the rotational Doppler effect(RDE),which paves a promising way to detect rotating objects *** order to obtain more information about the rotating object from the rotational Doppler signal,composite vortex beams by coaxial superposition of orbital angular momentum(OAM)modes are often used as the probe ***,to the best of our knowledge,the RDE of composite vortex beams with arbitrary OAM spectra has not yet been comprehensively *** this paper,the correspondence between the OAM spectrum of a probe beam and the frequency spectrum of a rotational Doppler signal is theoretically *** is explicitly revealed that the RDE frequency spectrum of scattered light is related to the product of two autocorrelation functions:one from the OAM spectrum of probe beam and the other from the spiral spectrum of rotating *** the basis of this relation,one can regulate the RDE frequency spectrum on demand via tailoring the OAM spectrum of the probe *** a proof of concept we design a special composite vortex beam to eliminate the broadening of the RDE spectrum induced by *** findings are of practical value in applications such as remote sensing and optical metrology.

关键词： OAM composite rotating

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Annulation Cascades of Cyclosulfonium Salts and Alkenes towards Sulfur-Containing N-Heterocycles by Visible Light/Copper Catalysis

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Chinese Journal of Chemistry 2024年第14期42卷 1637-1643页

作者： jie Ma Xufeng Li Yuqing Chen Yongjia shi Xiuyan Song Jian Lv Daoshan Yang Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdaoShandong266042 China Zhejiang Wansheng Co. Ltd.LinhaiZhejiang317000 China National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass Nanjing Forestry UniversityNanjingJiangsu210037 China

Although,great achievements have been made in the synthesis of heterocycles using radical addition/cyclization strategy,developing versatile alkyl radical precursors,especially the non-stabilized long chain alkyl radicals for this strategy still remains a huge ***,we report an efficient annulation cascade reaction between cyclosulfonium salts and alkenes for the synthesis of sulfur-containing N-heterocycles by visible light/copper catalysis under mild *** C—S bond cleavage/radical cascade reaction delivers a variety of corresponding N-heterocycles containing aryl alkyl thioether motifs with good functional group ***,the current system could be used for the late-stage functionalization of complex bioactive molecules.

关键词： Visible light Radical reactions C-C coupling Sulfur heterocycles Photoredox catalysis

红细胞生成性原卟啉病并发肝脏病变三例临床病理特征观察

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中华病理学杂志 2017年第10期46卷 704-707页

作者：师杰李晓青卢朝辉中国医学科学院北京协和医学院北京协和医院病理科 100730 中国医学科学院北京协和医学院北京协和医院消化内科 100730

目的探讨红细胞生成性原卟啉病（erythropoietic protoporphyria，EPP）并发肝脏病变的临床及肝脏病理学改变。方法回顾性分析2011年7月至2014年8月3例EPP并发肝脏病变的临床资料及穿刺组织病理资料，并结合相关文献进行复习。结果3例... 详细信息

目的探讨红细胞生成性原卟啉病（erythropoietic protoporphyria，EPP）并发肝脏病变的临床及肝脏病理学改变。方法回顾性分析2011年7月至2014年8月3例EPP并发肝脏病变的临床资料及穿刺组织病理资料，并结合相关文献进行复习。结果3例患者均以持续性腹痛难以缓解入院．伴明显黄疸及肝功能异常等，影像学提示肝脏体积均匀性增大；病理检查示肝细胞体积弥漫性增大．胞质粉染颗粒状或泡沫状；在部分肝细胞胞质内、Kuffer细胞胞质内、肝细胞间的微胆管内及部分扩张的肝窦内均可见棕黄色颗粒状及棕褐色浓缩的块状物质沉积，其大小不等、分布不均；在偏光显微镜下可呈现红色双折光及特征性的中央黑色十字架结构（马耳他十字，Maltese Cross）。此外，肝组织内还可见肝索肿胀、拥挤、部分肝细胞点灶状坏死及脂肪样变性，汇管区可见散在、灶性淋巴细胞浸润伴纤维组织增生及汇管区小胆管增生等非特异性改变，未见胆管管腔明显扩张。结论充分了解和认识EPP并发肝脏病变的临床及肝脏病理学改变，有助于我们在临床实践中筛查出那些以腹部症状为主要表现的卟啉病患者，使其尽早得到有效的治疗。

关键词：原卟啉病红细胞生成性活组织检查针吸诊断鉴别

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Effect of phosphorus content on interfacial heat transfer and film deposition behavior during the high-temperature simulation of strip casting

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1016-1025页

作者： Wanlin Wang Cheng lu Liang Hao jie Zeng Lejun Zhou Xinyuan Liu Xia Li Chenyang Zhu School of Metallurgy and Environment Central South UniversityChangsha 410083China National Center for International Research of Clean Metallurgy Central South UniversityChangsha 410083China Institute of Research of Iron and Steel ShasteelJiangsu ProvinceZhangjiagang 215625China

The interfacial wettability and heat transfer behavior are crucial in the strip casting of high phosphorus-containing steel.A hightemperature simulation of strip casting was conducted using the droplet solidification technique with the aims to reveal the effects of phosphorus content on interfacial wettability,deposited film,and interfacial heat transfer *** showed that when the phosphorus content increased from 0.014wt%to 0.406wt%,the mushy zone enlarged,the complete solidification temperature delayed from1518.3 to 1459.4℃,the final contact angle decreased from 118.4°to 102.8°,indicating improved interfacial contact,and the maximum heat flux increased from 6.9 to 9.2 MW/*** the phosphorus content from 0.081wt%to 0.406wt%also accelerated the film deposition rate from 1.57 to 1.73μm per test,resulting in a thickened naturally deposited film with increased thermal resistance that advanced the transition point of heat transfer from the fifth experiment to the third experiment.

关键词： strip casting interfacial heat transfer interfacial wettability naturally deposited film phosphorus content

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Subsurface multi-physical characterization of mountain excavation and city construction in loess plateau with a fiber-optic sensing system

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 2935-2946页

作者： jie Liu Bin shi Kai Gu Meng-Ya Sun Jun-Cheng Yao He-Ming Han School of Earth Sciences and Engineering Nanjing UniversityNanjingJiangsu210023China Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing210023China School of Earth Sciences and Engineering Hohai UniversityNanjing210098China

Mountain excavation and city construction(MECC)projects being launched in the Loess Plateau in China involve the creation of large-scale artificial *** the subsurface evolution characteristics of the artificial land is essential,yet ***,we use an improved fiber-optic monitoring system for its subsurface multi-physical *** system enables us to gather spatiotemporal distribution of various parameters,including strata deformation,temperature,and ***’an New District was selected as a case study to conduct refined in-situ monitoring through a 77 m-deep borehole and a 30 m-long *** reveal that the ground settlement involves both the deformation of the filling loess and the underlying intact ***,the filling loess exhibits a stronger creep capability compared to underlying intact *** deformation along the profile is unevenly distributed,with a positive correlation with soil *** accumulation has been observed at the interface between the filling loess and the underlying intact loess,leading to a significant ***,the temperature and moisture in the filling loess have reached a new equilibrium state,with their depths influenced by atmospheric conditions measuring at 31 m and 26 m,*** refined investigation allows us to identify critical layers that matter the sustainable development of newly created urban areas,and provide improved insights into the evolution mechanisms of land creation.

关键词： Mountain excavation and city construction Fiber-optic monitoring Multi-physical characterization Compacted loess

Assessment of climate damage in China based on integrated assessment framework

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Advances in Climate Change Research 2024年第1期15卷 124-133页

作者： jie LIU Xiang-Zhen shi Li YANG Chang-Yi LIU Jin-Cheng WANG Rui-Min ZHU Xue-Li shi Qiu-Feng LIU International Business School Shanxi Normal UniversityXi'an 710062China University of Chinese Academy of Social Sciences Bejing 102488China School of Economics and Management Xinjiang UniversityUrumqi 830046China Global Energy Interconnection Development and Cooperation Organization(GEIDCO) Bejing 100031China Hubei Enshi College Enshi 445099China CMA Earth System Modeling and Prediction Centre China Meteorological AdministrationBeijing 100081China National Climate Centre China Meteorological AdministrationBeijing 100081China

Developing a localized and consistent model framework for climate loss and damage assessment is crucial for the policy-making of climate change mitigation and *** study introduces a comprehensive,multidisciplinary Integrated Assessment Model(IAM)framework for evaluating climate damage in China,utilizing BCC-SESM climate model and FUND sectoral climate damage model under the SSP2-RCPs *** a bottom-up approach,the research estimates climate damage across eight major sectors,recalibrates sectoral climate damage functions and parameters for China,and elucidates distinctions among direct climate loss,market climate loss,and aggregate climate *** findings reveal that the total climate damage function for China follows a quadratic pattern in response to temperature *** 2050,the estimated climate damage is projected to be 5.4%,5.7%,and 8.2%of GDP under RCP2.6,RCP4.5,and RCP8.5,***,both direct and market climate losses are projected to remain below 2%of GDP by 2050,while the aggregate climate loss could reach as high as 8.2%,which is predominantly attributed to non-market *** a sectoral perspective,under the RCP8.5 scenario,human health damage constitutes the largest share(61.9%)of the total climate loss by 2050,followed by sea-level rise damage(18.6%).This study sheds lights on the adaptation policy that should attach importance to the non-market sectors,particularly focusing on human health and sea-level rise.

关键词： Climate loss and damage Integrated assessment model(IAM) FUND model Representative concentration pathways(RCPs)scenario BCC-SESM

Superatomic Ag58 nanoclusters incorporating a [MS4@Ag12]2+（M = Mo or W） kernel show aggregation-induced emission

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Chinese Chemical Letters 2024年第10期35卷 478-482页

作者： Jun-jie Fang Zheng Liu Yun-Peng Xie Xing lu State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology

In core-shell silver nanoclusters, the control of core structure presents a more formidable challenge compared to that of the shell structure. Here, we report the successful synthesis and characterization of four distinct silver thiolate nanoclusters [MS4@Ag12@Ag46S24（dppb）12]（M = Mo or W）, each incorporating a cup-like [MS4@Ag12]2+kernel. These nanoclusters were meticulously prepared using（NH4）2Mo S4or（NH4）2WS4as both a template and a controlled source of S2-ions. Remarkably, we have observed a unique configuration within these eight-electron superatomic Ag58nanoclusters, where the zerovalent Ag atoms reside exclusively within the inner [MS4@Ag12]2+kernel. This stands in contrast to other superatomic clusters possessing an Ag（0） core. Notably, the introduction of phenyl-containing compounds during the synthesis process induced a transformation in the space group symmetry from C2/c to I 4ˉ. This transformative effect was found to originate from the interplay between adjacent 1,4-bis（diphenylphosphino）butane（dppb） ligands, which facilitated enhanced emission through aggregationinduced intermolecular interactions, specifically C-H···π interactions. Collectively, our findings contribute substantively to the understanding of the intricate relationship between nanocluster structures and their corresponding properties, shedding light on the crucial roles played by templates and diphosphine ligands in this context.

关键词： Superatom Silver nanocluster Template synthesis Photoluminescence Aggregation -induced emission SILVER NANOCluSTERS OPTICAL-PROPERTIES CluSTERS THIOLATE NANOPARTICLES TRANSFORMATION CORE

Contemporary strategies and approaches for characterizing composition and enhancing biofilm penetration targeting bacterial extracellular polymeric substances

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Journal of Pharmaceutical Analysis 2024年第4期14卷 506-524页

作者： Lan lu Yuting Zhao Mingxing Li Xiaobo Wang jie Zhu Li Liao Jingya Wang Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department Sichuan Industrial Institute of AntibioticsSchool of PharmacyChengdu UniversityChengdu610000China Meishan Pharmaceutical Vocational College School of PharmacyMeishanSichuan620200China Laboratory of Molecular Pharmacology Department of PharmacologySchool of PharmacySouthwest Medical UniversityLuzhouSichuan646000China Hepatobiliary Surgery Langzhong People's HospitalLangzhongSichuan646000China

Extracellular polymeric substances(EPS)constitutes crucial elements within bacterial biofilms,facili-tating accelerated antimicrobial resistance and conferring defense against the host's immune *** precise and effective antibiofilm approaches and strategies,tailored to the specific charac-teristics of EPS composition,can offer valuable insights for the creation of novel antimicrobial ***,in turn,holds the potential to mitigate the alarming issue of bacterial drug *** analysis of EPS compositions relies heavily on colorimetric approaches with a significant bias,which is likely due to the selection of a standard compound and the cross-interference of various EPS *** the pivotal role of EPS in biofilm functionality,it is imperative for EPS research to delve deeper into the analysis of intricate compositions,moving beyond the current focus on polymeric *** ne-cessitates a shift from heavy reliance on colorimetric analytic methods to more comprehensive and nuanced analytical *** this study,we have provided a comprehensive summary of existing analytical methods utilized in the characterization of EPS ***,novel strategies aimed at targeting EPS to enhance biofilm penetration were explored,with a specific focus on high-lighting the limitations associated with colorimetric ***,we have outlined the challenges faced in identifying additional components of EPS and propose a prospective research plan to address these *** review has the potential to guide future researchers in the search for novel compounds capable of suppressing EPS,thereby inhibiting biofilm *** insight opens up a new avenue for exploration within this research domain.

关键词： Analytic strategies and approaches Composition characterization Extracellular polymeric substances(EPS) Promoting biofilm penetration