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Effect of High-Temperature Annealing on Microstructure and Mechanical Properties of Extremely Deformed Fe35Ni35Cr20Mn10 High-Entropy Alloy Wire

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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2025年第1期34卷 885-895页

作者： Shi, Mengchuan liao, Hengcheng Zhou, Jun li, Guangjing Cui, Zhan Yan, Tianrui liu, xuwen Southeast Univ Sch Mat Sci & Engn Jiangsu Key Lab Adv Met Mat Nanjing 211189 Peoples R China Jiangsu Univ Sci & Technol Sch Mat Sci & Engn Zhenjiang 212100 Peoples R China

Fe35Ni35Cr20Mn10 high-entropy alloy wire with a diameter of 0.45 mm, prepared by continuous cold-drawing from a rod with a diameter of 6.34 mm, was subjected to high-temperature annealing at 600, 700, 800, 900, and 1000 degrees C for 1 h. The microstructure and mechanical properties in different states were investigated by microscopy observations and tensile testing. The wire in the as-drawn state exhibited the highest strength but the lowest elongation because of its fine multilayer structure and high dislocation density. Annealing, particularly at higher temperatures, considerably reduced the yield strength and caused significant recovery in both the elongation and strain-hardening exponent. Increasing the annealing temperature significantly decreased the dislocation density, notably coarsened the recrystallized grains, and significantly increased the fraction of twin boundaries and mean widths of annealing twins. The yield strength was found to be positively related to the dislocation density, and the elongation exhibited a negative relationship. In addition to the decrease in dislocation density, the formation of annealing twins played an important role in enhancing the elongation.

关键词： cold drawing high-entropy alloy wire high-temperature annealing mechanical properties microstructure

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生物监测技术在工业废水监测领域的应用研究

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中国环境监测 2021年第1期37卷 1-10页

作者：朱冰清姜晟蔡琨张小琼李旭文徐东炯刘佳江苏省环境监测中心江苏南京210019 江苏省常州环境监测中心江苏省环境保护水环境生物监测重点实验室江苏常州213001 中国环境科学研究院北京100012

生物监测可以系统反映污染物对生物生长的影响及其在生物体内的转化和迁移,在水环境监测与生态健康管理中的重要性日益突出。伴随着工业化的快速发展,中国水环境污染问题依然严峻,工业废水治理和排放问题仍旧突出。为进一步保障工业废... 详细信息

生物监测可以系统反映污染物对生物生长的影响及其在生物体内的转化和迁移,在水环境监测与生态健康管理中的重要性日益突出。伴随着工业化的快速发展,中国水环境污染问题依然严峻,工业废水治理和排放问题仍旧突出。为进一步保障工业废水出水及受纳水体水质安全,迫切需要在工业废水监测中引入生物监测技术。对传统微生物群落监测法、水生生物毒性监测法和基于分子生物学技术的微生群落监测法等在工业废水监测领域的研究及应用进行了综述,并对存在的问题进行了总结。建议后续进一步完善工业废水生物监测体系时,参考国外成熟经验,制定出符合国内需求及特征的工业废水生物监测方法与评价标准,以便更好地掌握工业区整体环境健康及污染状况。

关键词：生物监测工业废水环境监测

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Remote sensing intelligent interpretation for geology: from the perspective of geological exploration

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INTERNATIONAL GEOLOGY REVIEW 2025年第10期67卷 1389-1391页

作者： Afandi, Achmad Chen, Weitao li, Xianju Qin, xuwen Wang, lizhe Univ Pendidikan Indonesia Dept Phys Educ Bandung Indonesia

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认知视角下企业战略变革过程中的冲突形成研究

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管理评论 2019年第4期31卷 162-174页

作者：李旭文齐中英哈尔滨工业大学管理学院哈尔滨150000 中国航天科技集团有限公司北京100048

本文以认知为视角,从微观层面对企业战略变革中的冲突形成进行了研究。首先,界定冲突的内涵与类别,并从认知主体、认知与认知客体角度分析了冲突形成的一般成因与战略变革成因。其次,以企业战略变革过程为主线,分析了企业高层、中层与... 详细信息

本文以认知为视角,从微观层面对企业战略变革中的冲突形成进行了研究。首先,界定冲突的内涵与类别,并从认知主体、认知与认知客体角度分析了冲突形成的一般成因与战略变革成因。其次,以企业战略变革过程为主线,分析了企业高层、中层与执行层管理者由于角色定位、注意力关注与认知图式的不同,在纵向与横向之间形成任务认知冲突、过程认知冲突与关系认知冲突的机理,建构了企业战略变革过程中冲突形成的理论模型。最后,以中国航天科技集团有限公司为研究样本,通过调查问卷方式开展了实证研究,结果表明:战略变革知觉与冲突显著正相关;战略变革与任务认知冲突、关系认知冲突显著正相关;战略变革与过程认知冲突不相关。

关键词：冲突形成战略变革认知视角企业战略

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Potential-selective electrochemiluminescence of AgInS2/ZnS nanocrystals and its immunoassay application

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CHEMICAL COMMUNICATIONS 2024年第37期60卷 4958-4961页

作者： li, Mengwei Gao, xuwen Ren, Xiaoxuan Ai, Yaojia Zhang, Bin Zou, Guizheng Shandong Univ Sch Chem & Chem Engn Jinan 250100 Peoples R China

Potential-selective electrochemiluminescence (ECL) with tunable maximum-emission-potential ranging from 0.95 to 0.30 V is achieved using AgInS2/ZnS nanocrystals, which is promising in the design of multiplexed bioassay on commercialized ECL setups. The model system AgInS2/ZnS/N2H4 exhibits efficient ECL around 0.30 V and can be exploited for sensitive immunoassays with less electrochemical interference and crosstalk.

关键词： Nanocrystals

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Molecular basis and targeted therapies for radioiodine refractory thyroid cancer

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ASIA-PACIFIC JOURNAL OF CliNICAL ONCOLOGY 2023年第3期19卷 279-289页

作者： Yu, Qiuxiao Zhang, xuwen li, li Zhang, Chi Huang, Jian Huang, Wenting Chinese Acad Med Sci & Peking Union Med Coll Natl Canc Ctr Dept Pathol Natl Clin Res Ctr CancCanc Hosp Shenzhen 518116 Guangdong Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Shenzhen Hosp Shenzhen 518116 Guangdong Peoples R China

Patients diagnosed with radioiodine refractory thyroid cancer (RAIR-TC) are not amenable to novel I-131 therapy due to the reduced expression of sodium iodide symporter (Na+/I- symporter, NIS) and/or the impairment of NIS trafficking to the plasma membrane. RAIR-TC patients have a relatively poor prognosis with a mean life expectancy of 3-5 years, contributing to the majority of TC-associated mortality. Identifying RAIR-TC patients and selecting proper treatment strategies remain challenging for clinicians. In this review, we demonstrate the updated clinical scenarios or the so-called "definitions" of RAIR-TC suggested by several associations based on I-131 uptake ability and tumor response post-I-131 therapy. We also discuss current knowledge of the molecular alterations involved in membrane-localized NIS loss, which provides a preclinical basis for the development of targeted therapies, in particular, tyrosine kinase inhibitors (TKIs), redifferentiation approaches, and immune checkpoint inhibitors.

关键词： immune checkpoint inhibitors radioiodine refractory thyroid cancer redifferentiation therapies sodium iodide symporter tyrosine kinase inhibitors

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Semi-interpenetrating network membranes based on poly(phenylene oxide) and poly(acrylonitrile-vinylimidazole) for high-temperature proton exchange membrane fuel cell applications

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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 2025年 116卷 1-7页

作者： Han, Yuyang Xu, Fei Huang, Kai li, Yanting Yang, Qinwu Bao, xuwen lin, Bencai Changzhou Univ Jiangsu Collaborat Innovat Ctr Photovolat Sci & En Sch Mat Sci & Engn Changzhou 213164 Jiangsu Peoples R China

In this study, a series of semi-interpenetrating network (semi-IPN) structure proton exchange membranes (PEMs) based on linear polyolefins and cross-linked poly(phenylene oxide) (cPPO) was fabricated for fuel cell applications. The newly synthesized membranes exhibit better flexibility and higher chemical and thermal stability than cPPO membrane owing to a semi-IPN structure. After treatment with Fenton's reagent at 80 degrees C for 240 h, all the synthesized semi-IPN membranes (cPPO-[AN-VBIm]x) show a remaining mass of >90%, indicating good oxidation stability. The proton conductivity and fuel cell performance of cPPO-[AN-VBIm](50) membranes (91 mS cm(-1) at 160 degrees C and 514 mW cm(-2) at 140 degrees C, respectively) are better than those of cPPO membranes (51 mS cm(-1) and 87 mW cm(-2), respectively under the same conditions). This study contributes significantly toward membrane research, reporting a facile and efficient method for fabricating high-performance phosphoric acid-doped membranes for high-temperature fuel cell applications that could guide future studies on efficient and practicable high-temperature PEMs.

关键词： Poly(phenylene oxide) Semi-interpenetrating network Proton exchange membrane Fuel cells Proton conductivity Phosphoric acid-doped membranes

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GhEXL3 participates in brassinosteroids regulation of fiber elongation in Gossypium hirsutum

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PLANT JOURNAL 2024年第2期120卷 491-504页

作者： Zhang, Changsheng liu, Zhao Shu, Sheng li, Xinyang li, Yujun liu, Le liu, li Wang, xuwen li, Fuguang Qanmber, Ghulam Yang, Zuoren Zhengzhou Univ Sch Agr Sci State Key Lab Cotton Biobreeding & Integrated Util Zhengzhou Res Base Zhengzhou Peoples R China Chinese Acad Agr Sci Inst Cotton Res State Key Lab Cotton Biobreeding & Integrated Util Anyang Peoples R China Chinese Acad Agr Sci Western Agr Res Ctr Changji Peoples R China Xinjiang Acad Agr & Reclamat Sci Cotton Res Inst Northwest Inland Reg Key Lab Cotton Biol & Genet B Shihezi Peoples R China

Cotton fiber (Gossypium hirsutum) serves as an ideal model for investigating the molecular mechanisms of plant cell elongation at the single-cell level. Brassinosteroids (BRs) play a crucial role in regulating plant growth and development. However, the mechanism by which BR influences cotton fiber elongation remains incompletely understood. In this study, we identified EXORDIUM-like (GhEXL3) through transcriptome analysis of fibers from BR-deficient cotton mutant pagoda 1 (pag1) and BRI1-EMS-SUPPRESSOR 1 (GhBES1.4, encoding a central transcription factor of BR signaling) overexpression cotton lines. Knockout of GhEXL3 using CRISPR/Cas9 was found to impede cotton fiber elongation, while its overexpression promoted fiber elongation, suggesting a positive regulatory function for GhEXL3 in fiber elongation. Furthermore, in vitro ovule culture experiments revealed that the overexpression of GhEXL3 partially counteracted the inhibitory effects of brassinazole (BRZ) on cotton fiber elongation, providing additional evidence of GhEXL3 involvement in BR signaling pathways. Moreover, our findings demonstrate that GhBES1.4 directly binds to the E-box (CACGTG) motif in the GhEXL3 promoter region and enhances its transcription. RNA-seq analysis revealed that overexpression of GhEXL3 upregulated the expression of EXPs, XTHs, and other genes associated with fiber cell elongation. Overall, our study contributes to understanding the mechanism by which BR regulates the elongation of cotton fibers through the direct modulation of GhEXL3 expression by GhBES1.4.

关键词： cotton fiber brassinosteroids GhEXL3 GhBES1.4 cell elongation

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Study on the temperature uniformity of workpieces inside an annealing furnace

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INTERNATIONAL JOURNAL OF THERMAL SCIENCES 2025年 212卷

作者： Wang, xuwen Long, Zhanyong Zhou, Kai Xiao, Han Che, Xingbang liao, Junming li, Chunbo Shenzhen Technol Univ Coll Urban Transportat & Logist Shenzhen 518000 Guangdong Peoples R China Laplace Renewable Energy Technol Co Ltd Guangzhou 510000 Guangdong Peoples R China Shenzhen Technol Univ Key Lab Adv Opt Precis Mfg Technol Guangdong Higher Educ Inst Shenzhen 518118 Guangdong Peoples R China

A numerical analysis model of the transient temperature field was established to address the issue of temperature field measurement in a silicon carbide annealing furnace. Numerical simulations of the vacuum annealing process yielded temperature distributions at 550 degrees C, 1200 degrees C, and 1700 degrees C. Real-time temperature measurements using internal thermocouples were conducted at two points within the furnace, showing actual temperature variations. The comparison between simulated and measured data revealed that the maximum error during the holding stage was within 3 %. Based on this, an analysis of the temperature distribution inside the silicon carbide vacuum annealing furnace was performed. The results indicate that increasing the holding temperature during the annealing process effectively reduces the time needed for the workpieces to stabilize at a uniform temperature and improves temperature uniformity by the end of the process. Additionally, by the end of the annealing process, the highest temperatures of the workpieces are concentrated primarily in the middle pieces. The temperature difference among workpieces near the center is minimal, remaining within 2 degrees C. By the end of the holding phase, 43.64 % of the workpieces in the furnace meet the process requirements. This study offers valuable insights for the structural design and temperature control of silicon carbide vacuum annealing furnaces.

关键词： Annealing furnace Numerical simulation Temperature uniformity Silicon carbide (4H-SiC)

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Comparative analysis of three heating methods for natural gas hydrate production: Electric heating, steam injection, and hot water injection

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APPliED THERMAL ENGINEERING 2025年 269卷

作者： Zhang, Zhaobin Xu, Tao li, Shouding Guo, Peng li, Xiao Lu, Cheng Sun, Yiming Wang, Pingkang Qin, xuwen Chinese Acad Sci Inst Geol & Geophys Key Lab Deep Petr Intelligent Explorat & Dev Beijing 100029 Peoples R China Univ Chinese Acad Sci Coll Earth & Planetary Sci Beijing 100049 Peoples R China China Geol Survey China Aero Geophys Survey & Remote Sensing Ctr Nat Beijing 100083 Peoples R China Minist Nat Resources China Geol Survey Oil & Gas Resources Survey Beijing 100083 Peoples R China Natl Engn Res Ctr Gas Hydrate Explorat & Dev Guangzhou 510075 Guangdong Peoples R China

Natural gas hydrates are a promising and environmentally sustainable energy resource, but their commercial production remains challenging. External heating is crucial for improving production efficiency. In this study, we employed a self-developed simulator (IGG-hydrate) to compare the thermal performance of three key heating methods: electric heating (EH), steam injection (SI), and hot water injection (WI). Quantitative indicators, including heating and depressurization thresholds, were introduced to assess the effectiveness of each method. The results demonstrate that external heating significantly facilitates hydrate dissociation, with electric heating and steam injection showing comparable gas production rates and early-stage efficiency. However, both electric heating and steam injection methods can cause localized overheating near injection wells, leading to energy inefficiency. In contrast, hot water injection achieves a more uniform temperature distribution and a broader heating range, while avoiding excessive temperature rise. However, it also reduces depressurization efficiency and increases subsidence near the wells. To optimize performance, we propose a steam-water alternating injection strategy: steam is injected initially for rapid dissociation near the wells, followed by hot water injection to extend the heating range and maintain thermal efficiency with the same equipment.

关键词： Heating method Electric heating Steam injection Hot water injection Hydrate

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