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Journal of Iron and Steel Research International 2021年第9期28卷 1133-1140页

作者： da-chao fu Guang-hua Wen Xue-qin Zhu Jun-li Guo Ping Tang College of Materials Science and Engineering Chongqing UniversityChongqing400044China

The initial solidification process of microalloyed steels was simulated using a confocal scanning laser microscope,and the growth behavior of austenite grain was observed in *** method for measuring the initial austenite grain size was studied,and the M_(0)^(*)(the parameter to describe the grain boundary migration)values at different cooling rates were then calculated using the initial austenite grain size and the final grain ***,a newly modified model for predicting the austenite grain size was established by introducing the relationship between M_(0)^(*)and the cooling rate,and the value calculated from the modified model closely corresponds to the measured value,with average relative error being less than 5%.further,the relationship between T^(γ)(the starting temperature for austenite grain growth)and equivalent carbon content C_(P)(C_(P)>0.18%)was obtained by in situ observation,and it was introduced into the modified model,which expanded the application scope of the *** the continuous casting slab produced by a steel plant as the experimental object,the modified austenite grain size prediction model was used to predict the austenite grain size at different depths of oscillation mark on the surface of slab,and the predicted value was in good agreement with the actual measured value.

关键词： In situ observation Microalloyed steel Austenite grain size Prediction model Oscillation mark depth

Human neural stem cell-derived extracellular vesicles protect against ischemic stroke by activating the PI3K/AKT/mTOR pathway

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Neural Regeneration Research 2025年第11期20卷 3245-3258页

作者： Jiayi Wang Mengke Zhao Dong fu Meina Wang chao Han Zhongyue Lv Liang Wang Jing Liu Stem Cell Clinical Research Center The First Affiliated Hospital of Dalian Medical UniversityDalianLiaoning ProvinceChina dalian Innovation Institute of Stem Cell and Precision Medicine DalianLiaoning ProvinceChina Institute(College)of Integrative Medicine Dalian Medical UniversityDalianLiaoning ProvinceChina

Human neural stem cell-derived extracellular vesicles exhibit analogous functions to their parental cells,and can thus be used as substitutes for stem cells in stem cell therapy,thereby mitigating the risks of stem cell therapy and advancing the frontiers of stem cell-derived *** lays a foundation for the development of potentially potent new treatment modalities for ischemic ***,the precise mechanisms underlying the efficacy and safety of human neural stem cell-derived extracellular vesicles remain unclear,presenting challenges for clinical *** promote the translation of therapy based on human neural stem cell-derived extracellular vesicles from the bench to the bedside,we conducted a comprehensive preclinical study to evaluate the efficacy and safety of human neural stem cell-derived extracellular vesicles in the treatment of ischemic *** found that administration of human neural stem cell-derived extracellular vesicles to an ischemic stroke rat model reduced the volume of cerebral infarction and promoted functional recovery by alleviating neuronal *** human neural stem cell-derived extracellular vesicles reduced neuronal apoptosis by enhancing phosphorylation of phosphoinositide 3-kinase,mammalian target of rapamycin,and protein kinase B,and these effects were reversed by treatment with a phosphoinositide 3-kinase *** findings suggest that human neural stem cell-derived extracellular vesicles play a neuroprotective role in ischemic stroke through activation of phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin signaling ***,we showed that human neural stem cell-derived extracellular vesicles have a good in vivo safety ***,human neural stem cell-derived extracellular vesicles are a promising potential agent for the treatment of ischemic stroke.

关键词： behavior exosome extracellular vesicles ischemic stroke mammalian target of rapamycin(mTOR) middle cerebral artery occlusion neural stem cells neuronal apoptosis phosphoinositide 3-kinase(PI3K) protein kinase B(AKT)

基于GYT双标图综合评价黄河流域中熟杂交棉花区域试验品种

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作物学报 2025年第1期51卷 30-43页

作者：李超付小琼中国农业科学院棉花研究所/棉花生物育种与综合利用全国重点实验室河南安阳455000 华北作物改良与调控国家重点实验室/河北省作物种质资源实验室/华北作物种质资源研究与利用教育部重点实验室/河北农业大学河北保定071001

对黄河流域中熟杂交棉花区域试验参试品种进行分析和评价,可以为品种合理布局和品种性状改良提供科学依据。本研究利用GYT双标图对2022—2023年黄河流域30个参试品种的产量、品质、农艺性状、抗病性进行综合评价,深入分析皮棉产量与铃... 详细信息

对黄河流域中熟杂交棉花区域试验参试品种进行分析和评价,可以为品种合理布局和品种性状改良提供科学依据。本研究利用GYT双标图对2022—2023年黄河流域30个参试品种的产量、品质、农艺性状、抗病性进行综合评价,深入分析皮棉产量与铃重、单株铃数、霜前花率、衣分、第一果枝节位、果枝数、生育期、株高、子指、纤维长度、断裂比强度、马克隆值、伸长率、整齐度、枯萎病指数、黄萎病指数等性状的组合水平,联合方差分析结果表明, 2年试验中所有性状的基因型效应和环境效应均达到了极显著水平,大部分基因型与环境互作效应达到了显著或极显著水平,同时大部分互作效应平方和占比总变异平方和比例大于基因型效应。筛选出中棉所9B07等产量-性状组合优良的品种,比对照品种中棉所9711适应性更广、丰产性更好,具有较高的应用推广价值。GYT双标图比GT双标图具有解释的变异比例更高、拟合度更好、分析结果可信度更高等优点,可以更加直观展示参试品种特点,为我国作物品种多性状综合评价提供参考。

关键词：棉花 GT双标图 GYT双标图产量-性状组合

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Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-fu Xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

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MEMS动态测试中频闪同步控制系统

天津大学学报（自然科学与工程技术版） 2005年第1期38卷 47-51页

作者：胡春光胡晓东金翠云栗大超郭彤傅星胡小唐天津大学精密测试技术及仪器国家重点实验室天津300072

频闪同步控制系统是微机电系统(MEMS)动态测试系统中的重要组成部分.为了满足MEMS发展对测试系统的需求,基于频闪成像技术,设计了一套频闪同步控制系统,用于采集高速运动的MEMS器件的清晰图像.系统采用虚拟仪器方式,通过软件控制波形发... 详细信息

频闪同步控制系统是微机电系统(MEMS)动态测试系统中的重要组成部分.为了满足MEMS发展对测试系统的需求,基于频闪成像技术,设计了一套频闪同步控制系统,用于采集高速运动的MEMS器件的清晰图像.系统采用虚拟仪器方式,通过软件控制波形发生器生成各类逻辑控制信号,驱动CCD摄像机、光源和图像采集卡等设备协调工作.实验表明,测量平面运动时,系统在 50倍放大倍率下,可测器件运动速度达 5. 1m/s,测量分辨率优于180nm,测量重复性为 40nm.

关键词：微机电系统动态测试虚拟仪器频闪同步

不同类型学业压力对不同年级高中生执行功能子成分的影响

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心理学报 2025年第1期57卷 18-35页

作者：马超汪彦云付军军赵鑫甘肃省行为与心理健康重点实验室西北师范大学心理学院兰州730070

选取985名高一~高三年级的学生,采用相关分析和结构方程模型等方法考察了学业压力4个子维度在不同年级高中生各执行功能成分中的作用。结果发现,随着高中生年级的升高,父母压力和教师压力对各执行功能成分的负向预测作用逐渐增强,社交... 详细信息

选取985名高一~高三年级的学生,采用相关分析和结构方程模型等方法考察了学业压力4个子维度在不同年级高中生各执行功能成分中的作用。结果发现,随着高中生年级的升高,父母压力和教师压力对各执行功能成分的负向预测作用逐渐增强,社交压力对各执行功能成分的负向预测作用逐渐减弱。相比之下,自我压力对高中生的干扰抑制、反应抑制和注意转换能力均显示出了正向预测作用,并随年级的升高而增强。这表明,不同类型学业压力对各执行功能成分的预测作用存在差异,并将随高中生年级的升高而发生变化。本研究所产生的结论对于教育工作者有效制定高中生学业压力应对策略具有重要的启示意义。

关键词：执行功能学业压力高中生结构方程模型

Preparation of silver nanoparticles through the reduction of straw-extracted lignin and its antibacterial hydrogel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 504-514页

作者： Lou Zhang Shuo Li fu Tang Jingkai Zhang Yuetong Kang Hean Zhang Lidong Li State Key Laboratory for Advanced Metals and Materials School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Silver nanoparticles(Ag NPs)have attracted attention in the field of biomaterials due to their excellent antibacterial ***,the reducing and stabilizing agents used for the chemical reduction of Ag NPs are usually toxic and may cause water *** this work,Ag NPs(31.2 nm in diameter)were prepared using the extract of straw,an agricultural waste,as the reducing and stabilizing *** analysis revealed that the straw extract contained lignin,the structure of which possesses phenolic hydroxyl and methoxy groups that facilitate the reduction of silver salts into Ag *** surfaces of Ag NPs were negatively charged due to the encapsulation of a thin layer of lignin molecules that prevented their *** the prepared Ag NPs were added to the precursor solution of acrylamide,free radical polymerization was triggered without the need for extra heating or light irradiation,resulting in the rapid formation of an Ag NP-polyacrylamide composite *** inhibition zone test proved that the composite hydrogel possessed excellent antibacterial ability due to the presence of Ag *** prepared hydrogel may have potential applications in the fabrication of biomedical materials,such as antibacterial dressings.

关键词： silver nanoparticles hydrogel straw extraction antibacterial

Surfing the nano-wave:Emerging trends in cancer diagnostics and therapy

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Nano Research 2025年第1期18卷 520-544页

作者： Genping fu Yuting Weng Yunfan Li Carl Ho Yiyu fu Wenxuan Wang Songbin fu Wenjing Sun Jie Lin Xiaoyu Fan Binbin Jia Mengdi Cai Linlin Li Laboratory of Medical Genetics Harbin Medical UniversityHarbin 150081China Key Laboratory of Preservation of Human Genetics Resources and Disease Control in China(Harbin Medical University) Ministry of EducationHarbin 150081China Beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal UniversityBeijing 100048China College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion MaterialsChina Three Gorges UniversityYichang 443002China Washington University School of Medicine in St.Louis St.LouisMO 63110USA Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Aix-Marseille College Wuhan University of TechnologyWuhan 430070China

Facing the growing global challenge posed by cancer,the quest for more accurate and potent cancer diagnostic and therapeutic strategies continues to require a multidisciplinary integration *** review firstly summarizes various types of nanoparticles in cancer ***,it offers a comprehensive overview of signalenhancing techniques for visualizing in situ tumors,along with multimodal diagnostic methods for detecting *** for tumor therapy,cutting-edge drug delivery methods that can cross biological barriers and the pinpoint targeting of tumor lesions for precise medical intervention are *** the domain of therapeutic diagnostics,we elucidate the theoretical underpinnings and structural paradigms that underlie a spectrum of advanced diagnostic and therapeutic ***,we present a compendium of publications delineating the clinical applications of each nano-based theragnostic integration ***,this comprehensive review discusses the safety concerns pertaining to the clinical application of nanoparticles and proposes some strategic recommendations to enhance the precision and safety of theragnostic-guided,nanotechnology-based clinical practices.A deeper understanding of nanomaterials,together with intimate interdisciplinary collaborations,nano-wave will most probably guide human beings to win the battle against cancers.

关键词： nanoparticles drug delivery gastric cancer glioma glioblastoma

Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution

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Nano Research 2025年第1期18卷 164-172页

作者： Yuanlin fu Xiaoting Yang Ya Yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen fuqiang Fan Yuhang Li Yu fu Department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China Department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

Theoretical dispersion curves for borehole real-valued wave modes in vertically transverse isotropic formations

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Petroleum Science 2022年第6期19卷 2649-2662页

作者： fu-Qiang Zeng chao Li Hubei Subsurface Multi-scale Imaging Key Laboratory Institute of Geophysics and GeomaticsChina University of GeosciencesWuhan430074HubeiChina State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing100190China Beijing Engineering and Technology Research Center for Deep Drilling Exploration and Measurement Beijing100190China

The dispersion curves of real-valued modes in a fluid-filled borehole are widely used in acoustic well *** accurate dispersion curves are the precondition of theoretical analysis and inversion ***,these curves can be obtained by solving the conventional dispersion equation for isotropic formations and most vertically transverse isotropy(VTI)***,if the real-valued solutions exist when the radial wavenumbers for the formation quasi-P and quasi-S equals to each other,the existed methods based on the conventional dispersion equation could lead to incorrect results for some VTI *** studies have focused on the influence of these real-valued solutions on dispersion curve *** remove these real-valued solutions,we have proposed a modified dispersion equation and its corresponding solving *** solving the dispersion equation,the Scholte wave velocity of VTI formation at high frequency is used as the initial *** two synthetic examples including fast and slow VTI formations validate that these real-valued solutions do not contribute to the wavefield,and the new dispersion curve extraction method is suitable for all kinds of VTI ***,the method can provide reliable dispersion curves for both theoretical analysis and anisotropic parameters inversion in VTI formations.

关键词： Dispersion equation Scholte wave velocity Acoustic properties Transverse isotropy Thomsen anisotropic parameters inversion