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Journal of Materials Science & Technology 2021年第5期64卷 141-152页

作者： Yong Li Zhiyong liu Endian fan Yunhua Huang yi fan Bojie Zhao National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Jiangsu key laboratory for premium steel material Nanjing Iron&Steel United Co.Ltd.Nanjing 210035China

In this work,the stress corrosion cracking(SCC)behavior of E690 steel base metal(BM)and different heat-affected zone(HAZ)microstructures,i.e.,coarse grain HAZ(CGHAZ),fine grain HAZ(FGHAZ),and intercritical HAZ(ICHAZ),was investigated at different cathodic potentials in artificial seawater by slow strain rate tensile tests,scanning electron microscopy and electron back-scattered diffraction *** results show that the HAZ microstructures and BM exhibit different SCC susceptibilities:FGHAZ

关键词： Low-carbon bainite steel Heat-affected zone microstructure Cathodic potential Stress corrosion cracking Hydrogen embrittlement

Recent Progress in Donor-Acceptor Type Conjugated Polymers for Organic Field-effect Transistors

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Chinese Journal of Polymer Science 2023年第5期41卷 652-670,I0006页

作者： yi-fan Li Yun-Long Guo Yun-Qi liu Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic solidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The recent progress in the design and synthesis of high-performance donor-acceptor conjugated polymeric semiconducting materials is reviewed from the perspective of multiscale *** multiscale of conjugated polymers is from the primary one-dimensional polymer molecular scale to the secondary polymer-chains interaction scale,and then to the tertiary polymer aggregate *** review focuses on the design and synthesis of polymer molecules,proposes new classification rules,and rationally summarizes the design strategies and modulation methods of *** describe the recent progress from these three aspects:(1)the modification ofπ-conjugated backbone,(2)the evolution of the polymerization methods,and(3)the regulation of aggregate-state structure.

关键词： Conjugated polymers Donor-acceptor Organic field-effect transistors Multiscale optimization

Y-branched TiO_2 nanotube arrays synthesized by anodic oxidation

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 14-18页

作者： YANG Xu Qu yi fan yi liu XingYuan National Key Lab of High Power Semiconductor Lasers Changchun University of Science and Technology Changchun 130022 China Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China

We report a novel synthesis strategy for Y-branched TiOe nanotubes on a pure titanium foil by electrochemical anodic oxida- tion in an NH4F organic electrolyte. Effects of temperature range, oxidation time, and morphology-dependent parameters of the Y-branched TiO2 nanotube arrays were investigated. We found that an optimized growth-temperature window between 20℃ and 30℃ resulted in Y-branched nanotubes with much better morphology and photoelectric performances. After annealing at 450℃ for 1.5 h in air, a dominant crystal structure of these arrays was indexed to anatase.

关键词： Y-branched TiO2 nanotube anodization oxidation temperature anatase

不同强度有氧运动对原发性开角型青光眼患者黄斑区视网膜血管密度的影响

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国际眼科杂志 2022年第1期22卷 118-122页

作者：王媛郝冰刘益帆冉文瑛朱冬梅孙兵兵王东伟郑州大学附属郑州中心医院眼科中国河南省郑州市450006 郑州大学附属郑州中心医院心脏康复科中国河南省郑州市450006

目的:探讨不同强度有氧运动对原发性开角型青光眼(POAG)患者黄斑区视网膜血管密度的影响。方法:前瞻性病例对照研究。纳入2019-01/2021-04于我院诊断为POAG患者48例88眼。招募本院学生、职工及其他科室患者家属43例86眼为正常对照组。... 详细信息

目的:探讨不同强度有氧运动对原发性开角型青光眼(POAG)患者黄斑区视网膜血管密度的影响。方法:前瞻性病例对照研究。纳入2019-01/2021-04于我院诊断为POAG患者48例88眼。招募本院学生、职工及其他科室患者家属43例86眼为正常对照组。使用免散瞳眼底照相机行免散瞳眼底照相检查。采用黄斑血管分割法进行黄斑区血管密度测定。根据黄斑区血管密度将POAG患者分为低血管密度组和高血管密度组,各24例。指导48例POAG的患者进行跑台负荷运动,比较高强度(76%~87%HRmax)、中等强度(64%~75%HRmax)和低强度(52%~63%HRmax)运动下患者的黄斑区血管密度水平。结果:正常对照组患者的黄斑区血管密度明显高于POAG组患者;与高血管密度组患者相比,低血管密度组患者的年龄、收缩压均明显较高,体质量明显较低;低血管密度组和高血管密度组患者,在中等强度有氧运动下的黄斑区视网膜血管密度均明显高于低强度和高强度有氧运动;收缩压和有氧运动是黄斑区血管密度的影响因素;以上比较结果均有差异(P<0.05)。结论:收缩压和有氧运动是黄斑区血管密度的影响因素,中等强度有氧运动可使低血管密度组和高血管密度组患者的黄斑区血管密度明显增加。

关键词：有氧运动原发性开角型青光眼黄斑区视网膜血管密度

Wigner Distribution Function and Husimi Function of a Kind of Squeezed Coherent State

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Communications in Theoretical Physics 2007年第3期47卷 427-430页

作者： fan Hong-yi liu Shu-Guang Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 China

We find a new x-parameter squeezed coherent state （p, q）κ representation, which possesses well-behaved features, i.e., its Wigner function＇s marginal distribution in the ＂q-direction＂ and in the ＂p-direction＂ is the Gauss/an form exp（-κ（q＇ - q）2}, and exp{（p＇ - p）2/κ}, respectively. Based on this, the Husimi function of（p, q）κ is also obtained, which is a Gauss/an broaden version of the Wigner function. The （P, q）κ state provides a good representative space for studying various properties ot the Husimi operator.

关键词： Wigner function Husimi function squeezed coherent state IWOP technique

A Possible 456-Day Optical Period of OQ 530

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Chinese Journal of Astronomy and Astrophysics 2007年第3期7卷 380-388页

作者： yi liu Juan Li Jun-Hui fan Center for Astrophysics Guangzhou University Guangzhou 510006

The post-1994 observations of the blazar OQ 530 in optical BVRI bands, and radio observations at 22 GHz and 37 GHz were collected. The date compensated discrete Fourier transform （DCDFr） and CLEANest methods were used to search for possible periodicities. Two possible periods of 456±100 days and 258±29 days were found in the optical bands. The existence of possible correlations between the optical and radio emissions was investigated by means of discrete correlation function （DCF） analysis, and no significant correlation was found. Some possible mechanisms for the periodic variability are discussed.

关键词： galaxies active - BL Lacertae objects general - BL Lacertae objects indi-vidual OQ 530

EFFECT OF INTERFACIAL THERMAL MISMATCH ON INTERFACIAL STRENGTH OF COMPOSITES

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中国有色金属学会会刊：英文版 1997年第3期7卷 76-80页

作者： liu, Ruoyu Wang, Lingsen Zhang, Jinsheng fan, yi Beijing Inst of Aeronautical Materials Beijing China

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关键词： composite interfacial thermal mismatch interfacial strength

Tribological properties of spherical and mesoporous NiAl particles as ionic liquid additives

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Friction 2020年第2期8卷 384-395页

作者： Yao YAO yi XU Xiaoqiang fan Minhao ZHU Guangfei liu Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Tribology Research Institute State Key Laboratory of Traction PowerSouthwest Jiaotong UniversityChengdu 610031China School of Engineering Liaocheng Vocational&Technical CollegeLiaocheng 252000China

In this study,spherical and mesoporous NiAl particles(abbreviated as sNiAl and mNiAl)were introduced as lubricant additives into two alkyl-imidazolium ionic liquids(ILs)(l-butyl-3-methylimidazolium tetrafluoroborate(LB104)and l-butyl-3-methyl imidazolium hexafluorophosphate(LP104))to explore their tribological *** sNiAl and mNiAl particles were modified in-situ by anion and cation moieties of ILs through chemical interaction,thereby enhancing their dispersibility and stability in *** mNiAl particles have better dispersibility than the sNiAl ones in ILs because of high specific surface ***104-modified sNiAl particles show better friction reduction and wear resistance,mainly relying on the synergy of the hybrid *** particles form a protective layer that prevents friction pairs from straight asperity contact and improves the tribological behaviors.

关键词： ionic liquids alloy particles spherical and mesoporous structure tribological properties

Vibration Control of the Rail Grinding Vehicle with Abrasive Belt Based on Structural Optimization and Lightweight Design

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 311-337页

作者： Wengang fan Shuai Zhang Zhiwei Wu yi liu Jiangnan Yu School of Mechanical Electronic and Control EngineeringBeijing Jiaotong UniversityBeijing 100044China Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control TechnologyMinistry of EducationBeijing 100044China China Railway Materials Operation and Maintenance Technology Co. LtdBeijing 100036China

As a new grinding and maintenance technology,rail belt grinding shows significant advantages in many applications The dynamic characteristics of the rail belt grinding vehicle largely determines its grinding performance and service *** order to explore the vibration control method of the rail grinding vehicle with abrasive belt,the vibration response changes in structural optimization and lightweight design are respectively analyzed through transient response and random vibration simulations in this ***,the transient response simulation analysis of the rail grinding vehicle with abrasive belt is carried out under operating conditions and non-operating ***,the vibration control of the grinding vehicle is implemented by setting vibration isolation elements,optimizing the structure,and increasing ***,in order to further explore the dynamic characteristics of the rail grinding vehicle,the random vibration simulation analysis of the grinding vehicle is carried out under the condition of the horizontal irregularity of the American AAR6 ***,by replacing the Q235 steel frame material with 7075 aluminum alloy and LA43M magnesium alloy,both vibration control and lightweight design can be achieved *** results of transient dynamic response analysis show that the acceleration of most positions in the two working conditions exceeds the standard value in GB/T 17426-1998 *** optimizing the structure of the grinding vehicle in three ways,the average vibration acceleration of the whole car is reduced by about 55.1%from 15.6 m/s^(2) to 7.0 m/s^(2).The results of random vibration analysis show that the grinding vehicle with Q235 steel frame does not meet the safety conditions of 3σ.By changing frame material,the maximum vibration stress of the vehicle can be reduced from 240.7 MPa to 160.0 MPa and the weight of the grinding vehicle is reduced by about 21.7%from 1500 kg to 1175 *** modal analysis results indic

关键词： Vibration control Dynamic characteristics Structural optimization Lightweight design Modal analysis

敌草快对鸡输卵管膨大部组织结构、细胞凋亡及繁殖性能相关基因表达的影响

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农业生物技术学报 2025年第1期33卷 146-156页

作者：戴逸园丁香胡威刘犇肖佩怡杨雪郑文亚樊庆灿宜春学院生命科学与资源环境学院江西省高等学校硒农业工程技术研究中心江西绿科农牧科技有限公司

联吡啶类除草剂敌草快(Diquat)作为现代农业生产中常用的农药，极易引起禽类发生氧化应激，为探究敌草快诱导的氧化应激对鸡输卵管膨大部的影响，本研究选取45只健康且体重相近的180日龄康乐黄母鸡(Gallus gallus)，随机分成3组，每组1... 详细信息

联吡啶类除草剂敌草快(Diquat)作为现代农业生产中常用的农药，极易引起禽类发生氧化应激，为探究敌草快诱导的氧化应激对鸡输卵管膨大部的影响，本研究选取45只健康且体重相近的180日龄康乐黄母鸡(Gallus gallus)，随机分成3组，每组15只。各组鸡均饲喂基础饲粮且自由饮水，经1周适应性饲养后，实验组分别一次性腹腔注射10和20 mg/kg BW(body weight,体重)的敌草快，对照组腹腔注射等剂量的生理盐水，21 d后采集输卵管膨大部组织，利用抗氧化功能检测试剂盒检测抗氧化指标，利用苏木素-伊红(hematoxylin-eosin, HE)染色技术观察病理损伤，利用免疫组织化学(immunohistochemistry, IHC)技术检测相关蛋白的分布，利用qPCR和Western blot技术检测细胞凋亡和繁殖性能相关基因及蛋白的表达。结果显示，敌草快组的输卵管膨大部中过氧化氢酶(catalase, CAT)、总超氧化物歧化酶(total superoxide dismutase, T-SOD)活性显著降低(P<0.05)，丙二醛(malondialdehyde, MDA)浓度显著升高(P<0.05)。HE染色结果显示，敌草快组的输卵管膨大部管径减小，固有层细胞分布稀疏，黏膜上皮游离面纤毛受损，敌草快20 mg/kg组的黏膜上皮细胞出现空泡化。IHC结果显示，敌草快组的输卵管膨大部黏膜上皮和固有层中增殖细胞核抗原(proliferating cell nuclear antigen, PCNA)的染色强度降低，无翅型鼠乳腺癌病毒整合位点4(Wingless-related murine mammary tumor virus integration site 4, Wnt4)在黏膜上皮游离面的染色强度也降低。qPCR结果显示，敌草快20 mg/kg组的输卵管膨大部中抗凋亡相关基因B-细胞淋巴瘤-2(B-cell lymphoma-2, Bcl-2)表达水平显著下调(P<0.05)，敌草快组促凋亡相关基因Bcl-2相关X蛋白(Bcl-2 associated X protein, Bax)和半胱氨酸蛋白酶3(Caspase3)的基因表达水平及Bax/Bcl-2均显著上调(P<0.05)；繁殖性能相关基因透明带精子结合蛋白2(zona pellucida sperm-binding protein 2, ZP2)和Wnt4的基因表达水平显著下调(P<0.05)。Western blot结果显示，Bcl-2、Bax、Caspase3、ZP2和Wnt4的蛋白表达水平与基因表达的变化趋势基本一致。上述研究结果表明，敌草快能够诱导鸡输卵管膨大部发生氧化应激和细胞凋亡，进而损伤膨大部组织结构及抑制繁殖性能相关基因的表达。本研究为缓解联吡啶类农药对禽类输卵管的损伤及保护繁殖性能提供理论参考。

关键词：敌草快氧化应激母鸡输卵管膨大部细胞凋亡繁殖性能相关基因