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Simultaneous detection of flare-associated kink oscillations and extreme-ultraviolet waves

Science China(Technological Sciences) 2024年第5期67卷 1592-1601页

作者： LI Dong hou ZhenYong BAI xianYong LI Chuan FANG Matthew ZHAO HaiSheng WANG JinCheng NING ZongJun Key Laboratory of Dark Matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing210023China Yunnan Key Laboratory of the Solar Physics and Space Science Kunming650216China School of Earth and Space Sciences Peking UniversityBeijing100871China National Astronomical Observatories Chinese Academy of SciencesBeijing100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing100049China School of Astronomy and Space Science Nanjing UniversityNanjing210023China Key Laboratory of Modern Astronomy and Astrophysics Ministry of EducationNanjing UniversityNanjing210023China Columbus Academy GahannaOhio43230USA Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Yunnan Observatories Chinese Academy of SciencesKunming650216China

Kink oscillations,which are frequently observed in coronal loops and prominences,are often accompanied by extreme-ultraviolet(EUV)***,much more needs to be explored regarding the causal relationships between kink oscillations and EUV *** this article,we report the simultaneous detection of kink oscillations and EUV waves that are both associated with an X2.1 flare on 2023 March 03(SOL2023-03-03T17:39).The kink oscillations,which are almost perpendicular to the axes of loop-like structures,are observed in three coronal loops and one *** short loop shows in-phase oscillation within the same period of 5.2 min at three *** oscillation could be triggered by the pushing of an expanding loop and interpreted as the standing kink *** lags are found between the kink oscillations of the short loop and two long loops,suggesting that the kink wave travels in different *** kink oscillations of one long loop and the prominence are possibly driven by the disturbance of the coronal mass ejection(CME),and that of another long loop might be attributed to the interaction of the EUV *** onset time of the kink oscillation of the short loop is nearly same as the beginning of an EUV *** fact demonstrates that they are almost *** EUV wave is most likely excited by the expanding loop structure and shows two *** leading component is a fast coronal wave,and the trailing one could be due to the stretching magnetic field lines.

关键词： coronal loops solar flares solar prominence solar oscillations extreme-ultraviolet wave magnetohydrodynamic

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钢筋混凝土结构移动式精准检测技术开发

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工程力学 2024年第1期41卷 1-16页

作者：吴智深侯士通黄玺黄璜东南大学土木工程学院江苏南京211189 东南大学城市工程科学技术研究院江苏南京211189 日本茨城大学工学部都市系统工程系茨城日立316-8511

无损检测技术是一种在不损害材料及结构服役性能的前提下,对其性质进行评估和测量的检测技术。然而,随着无损检测技术的发展和实践,结构内部的复杂损伤检测缺乏多层次精准性成为该领域的难点和核心问题。该文旨在结合国内外的研究成果,... 详细信息

无损检测技术是一种在不损害材料及结构服役性能的前提下,对其性质进行评估和测量的检测技术。然而,随着无损检测技术的发展和实践,结构内部的复杂损伤检测缺乏多层次精准性成为该领域的难点和核心问题。该文旨在结合国内外的研究成果,对无损检测技术的发展、分类和挑战进行梳理和分析,并在此基础上,介绍作者研究团队建立的一套由宏观到细观,再到内部的全面精准检测系统研究成果。针对表面宏观识别与细观定量识别,作者团队开发了表观病害视觉检测技术,包括构建的空间基准点自动追踪融合和亚像素级病害分割的全景图像快速拼接及表观病害厘米级定位方法,以及提出的全景图像中0.05 mm~0.2 mm多尺寸微细裂缝同步识别及真伪判别的人工智能算法。针对结构内部损伤识别,作者团队首创了智能变频敲击声波扫描及各类损伤精准识别新原理,发明建立了自适应激励分布移动敲击声波的损伤检测评估理论方法、声波及声纹图像特征人工智能算法及智能装备关键技术。经过实验验证,裂缝检测中宽度为0.05 mm时最大深度可达40 mm,剥离检测中最大深度可达400 mm,最小识别范围为50 mm。

关键词：无损检测变频敲击图像处理内部损伤裂缝识别钢筋混凝土敲击检测

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Dynamic response and failure process of horizontal-layered fractured structure rock slope under strong earthquake

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Journal of Mountain Science 2024年第3期21卷 882-900页

作者： WANG Tong LIU xianfeng hou Zhaoxu XU Jiahang ZHANG Jun YUAN Shengyang JIANG Guanlu HU Jinshan School of Civil Engineering Southwest Jiaotong UniversityChengdu 610031China Key Laboratory of High-Speed Railway Engineering of Ministry of Education Southwest Jiaotong UniversityChengdu 610031China School of Civil Engineering Xinjiang Institute of EngineeringUrumqi 830023China China Railway First Survey and design Institute Group Co.LTD Xi'an 710043China

Rock slope with horizontal-layered fractured structure(HLFS)has high stability in its natural ***,a strong earthquake can induce rock fissure expansion,ultimately leading to slope *** this study,the dynamic response,failure mode,and spectral characteristics of rock slope with HLFS under strong earthquake conditions were investigated based on the large-scale shaking table model *** this basis,multiple sets of numerical calculation models were further established by UdeC discrete element *** influencing factors were considered in the parametric study of numerical simulations,including slope height,slope angle,bedding-plane spacing and secondary joint spacing as well as bedrock dip *** results showed that the failure process of rock slope with HLFS under earthquake action is mainly divided into four phases,i.e.,the tensile crack of the slope shoulder joints and shear dislocation at the top bedding plane,the extension of vertical joint cracks and increase of shear displacement,the formation of step-through sliding surfaces and the instability,and finally collapse of fractured rock *** acceleration response of slopes exhibits elevation amplification effect and surface *** simulations indicate that the seismic stability of slopes with HLFS exhibits a negative correlation with slope height and angle,but a positive correlation with bedding-plane spacing,joint spacing,and bedrock dip *** results of this study can provide a reference for seismic stability evaluation of weathered rock slopes.

关键词： Seismic behavior Horizontal layered Weathered rock slope Shaking table test Failure mode

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中国人的思维方式与心理健康:心理弹性与自尊的作用

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心理科学 2024年第2期47卷 458-466页

作者：黄莲琼罗曦侯玉波北京大学心理与认知科学学院暨行为与心理健康北京市重点实验室北京100871

本研究探究了中国人思维方式与心理健康的关系以及心理弹性和自尊在其中的作用。对630份有效数据进行分析后发现,思维的联系性正向预测心理健康,矛盾性则负向预测心理健康;心理弹性在思维方式与心理健康间起中介作用;自尊不仅调节思维... 详细信息

本研究探究了中国人思维方式与心理健康的关系以及心理弹性和自尊在其中的作用。对630份有效数据进行分析后发现,思维的联系性正向预测心理健康,矛盾性则负向预测心理健康;心理弹性在思维方式与心理健康间起中介作用;自尊不仅调节思维方式与心理健康的关系,也调节思维方式与心理弹性以及心理弹性与心理健康的关系,在该研究模型中起核心作用。这些结果不仅揭示了思维方式影响心理健康的机制,而且特别强调自尊在此过程中的重要作用。

关键词：思维方式心理健康心理弹性自尊

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A robust indium-organic framework with open tubular channels for efficient separation of acetylene

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Nano Research 2024年第4期17卷 3139-3146页

作者： Yong-Zhi Li Gang-Ding Wang Fan Xu Qing Yin Danyang Zhao Jiqiu Qi Yanwei Sui Lei hou Yao-Yu Wang School of Materials and Physics China University of Mining and TechnologyXuzhou 221116China Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory of Physico-Inorganic ChemistryCollege of Chemistry&Materials ScienceNorthwest UniversityXi’an 710069China

Considering the tremendous applications and purification requirement of acetylene(C_(2)H_(2)),seeking appropriate adsorbents with high capacity and selectivity is a vital task and remains an enduring ***,we designed and synthesized a robust three-dimensional(3D)indium-organic framework([(Me)_(2)NH_(2)][In(L6)_(0.5)(IPA)_(0.5)]·DMA·2H_(2)O(In-L6-IPA,DMA=dimethylammonium,IPA=isopropyl alcohol))featuring two types of one-dimensional(1D)tubular *** activated In-L6-IPA displayed high loading for C_(2)H_(2)(104.4 cm^(3)·g^(-1),the second highest value among all reported indium-based metal-organic frameworks(MOFs))and simultaneously selective adsorption for C_(2)H_(2) over CO_(2),C_(2)H_(6),and ethylene(C_(2)H_(4))at 298 K under 100 *** modelling revealed that the porous wall of In-L6-IPA provides more and stronger multiple interactions for C_(2)H_(2) than CO_(2),C_(2)H_(6),and C_(2)H_(4) containing C–H···π,C–H···O,and O···π*** experiments validated the actual separation ability for various ratios of binary C_(2)H_(2)/C_(2)H_(4) and C_(2)H_(2)/CO_(2) mixtures as well as equimolar ternary C_(2)H_(2)/C_(2)H_(4)/CO_(2) and C_(2)H_(2)/C_(2)H_(4)/C_(2)H_(6) mixtures with excellent reusability.

关键词： indium-organic framework crystal structure gas adsorption acetylene(C_(2)H_(2))separation

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Enhancement of catalytic activity for hydrogenation of nitroaromatic by anionic metal-organic framework

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Chinese Chemical Letters 2024年第3期35卷 144-148页

作者： Qi Wu Anyang Li Ruibo He Yaxi Wu Lei hou Guoping Yang Wenyan Zhang Yao-Yu Wang Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi'an 710127China

Nitroaromatic hydrogenation catalysis without precious metals remains a longstanding *** rate of electron transfer is the crucial factor affecting hydrogenation ***,an ionic Cd-based metal-organic framework(I-Cd-MOF)exhibiting a unique structure with one-dimensional(1D)opening nanochannels and good electron transfer ability was synthesized for catalyzing hydrogenation of 4-nitrophenol(4-NP).The catalytic activity of the unique I-Cd-MOF without noble metals is detected,which is higher than most reported noble metal ***,the reaction rate of I-Cd-MOF(4.28 min^(-1))is about 47.6 times higher than that of the Cd-based neutral MOF(N-Cd-MOF)with the similar crystalline *** chromatograph mass spectrometer(LC-MS)and theoretical results demonstrate that 4-NP and five intermediates are stabilized in the channels of I-Cd-MOF,which increases the possibility of contact with H^*and H_(2)g enerated at the Cd *** I-Cd-MOF was extended to other nitroaromatic hydrogenation catalysis,which still displays excellent *** importantly,the I-MOF@Filter membrane was successfully constructed for continuous hydrogenation catalytic reactions,which maintains a high catalytic performance after 7 cycles of recycling without *** work fills in the application of the I-MOFs in hydrogenation catalytic reactions and provides an effective way for the rapid and green degradation of nitroaromatic compounds.

关键词： Anions Metal-organic frameworks Catalysis Electron transfer Hydrogen production

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Enhancing the Photosensitivity of Hypocrellin A by Perylene Diimide Metallacage‑Based Host–Guest Complexation for Photodynamic Therapy

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Nano-Micro Letters 2024年第11期16卷 71-87页

作者： Rongrong Li Tianfeng Yang xiuhong Peng Qian Feng Yali hou Jiao Zhu Dake Chu xianglong Duan Yanming Zhang Mingming Zhang State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Pharmacy Health Science CenterXi’an Jiaotong UniversityXi’an 710061People’s Republic of China department of Rehabilitation Medicine Shaanxi Provincial People’s HospitalXi’an 710068ShaanxiPeople’s Republic of China department of Gastroenterology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061People’s Republic of China

The development of supramolecular hosts which can efficiently encapsulate photosensitizers to improve the photodynamic efficacy holds great promise for cancer ***,we report two perylene diimide-based metallacages that can form stable host–guest complexes with planar conjugated molecules including polycyclic aromatic hydrocarbons and photosensitizers(hypocrellin A).Such host–guest complexation not only prevents the aggregation of photosensitizers in aqueous environments,but also offers fluorescence resonance energy transfer(FRET)from the metallacage to the photosensitizers to further improve the singlet oxygen generation(Φ_(Δ)=0.66).The complexes are further assembled with amphiphilic polymers,forming nanoparticles with improved stability for anticancer *** in vitro and in vivo studies indicate that the nanoparticles display excellent anticancer activities upon light irradiation,showing great potential for cancer photodynamic *** study provides a straightforward and effective approach for enhancing the photosensitivity of conventional photosensitizers via host–guest complexation-based FRET,which will open a new avenue for host–guest chemistry-based supramolecular theranostics.

关键词： Metallacages Host-guest interactions Fluorescence resonance energy transfer Singlet oxygen Photodynamic therapy

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Multifunctional electroactive bio-adhesive for robustly-integrated wound therapy and postoperative wound-status warning and assessment

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Nano Research 2024年第5期17卷 4359-4370页

作者： Ouyang Yue Xuechuan Wang Mengdi hou Siwei Sun Manhui Zheng xiaoliang Zou Zhongxue Bai Chunlin Liu xinhua Liu College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXi’an 710021China College of Pharmacy Shaanxi University of Chinese MedicineXi’an 710021China Institute of Basic and Translational Medicine Xi’an Medical UniversityXi’an 710021China School of Mechanical Engineering Chengdu UniversityChengdu 610000China

Wound abnormalities such as secondary wound laceration and inflammation are common postoperative health hazards during clinical *** continuous treatment,healing induction,and real-time visualization of wound status and complications,including wound re-tearing,inflammation,and morphology,are key focal points for comprehensive ***,an on-demand quadruple energy dissipative strategy was proposed for the nanoengineering of a physically and chemically synergistic double-layer gelatin-based bio-adhesive(DLGel)by combining a multi-network adhesive layer and a versatile electroactive energy dissipative layer based on contrivable interlocking micro-pillar arrays and crosslinked polymer *** subtly multiple energy dissipation designs enable DLGel with robust adhesive strength to omnipotently wet and dynamic tissue,providing a basis for reliable wound *** achieves comprehensive wound-healing induction through electrical stimulation and possesses reversible underwater light/thermal adhesion,excellent hemostatic performance,outstanding antimicrobial properties,and self-repair ***,a novel deep-learning strategy is creatively established to respond to mechanical deformation due to wound *** strategy translates biological information into visual graphics,providing real-time early warning and assessment of postoperative wound-abnormality/-morphology,such as laceration,inflammation,and ***,DLGel and its associated signal collection and processing protocol enable the integration of reliable wound closure,wound healing,and real-time postoperative wound-status warning and assessment within the unobservable and undetectable“black box”regions in a context of non-clinical comprehensive therapy.

关键词： electroactive bio-adhesive quadruple energy dissipation comprehensive wound therapy postoperative wound-status warning and assessment

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Multifunctional Integrated Organic-Inorganic-Metal Hybrid Aerogel for Excellent Thermal Insulation and Electromagnetic Shielding Performance

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Nano-Micro Letters 2024年第10期16卷 163-175页

作者： Zhaoqi Niu Fengjin Qu Fang Chen xiaoyan Ma Beixi Chen Luyao Wang Miao Xu Shumeng Wang Liang Jin Chengshuang Zhang xiao hou Ministry of Industry and Information Technology Key Laboratory of Special Function and Smart Polymer Materials Key Laboratory of Materials Physics and Chemistry of Ministry of Education for Extraordinary ConditionsNorthwestern Polytechnical UniversityXi'an 710072People's Republic of China Spallation Neutron Source Science Center Institution Dongguan 523803People's Republic of China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049People's Republic of China China Aerospace Science and Industry Corporation Sixth Academy Hohhot 022185People's Republic of China xi'an Aerospace Composites Research Institute Xi'an 710025People's Republic of China China Aerospace Science and Technology Corporation Beijing 100037People's Republic of China

Vehicles operating in space need to withstand extreme thermal and electromagnetic environments in light of the burgeoning of space science and *** is imperatively desired to high insulation materials with lightweight and extensive mechanical ***,a boron-silica-tantalum ternary hybrid phenolic aerogel(BSiTa-PA)with exceptional thermal stability,extensive mechanical strength,low thermal conductivity(49.6 mW m^(-1)K^(-1)),and heightened ablative resistance is prepared by an expeditious *** extremely thermal erosion,the obtained carbon aerogel demonstrates noteworthy electromagnetic interference(EMI)shielding performance with an efficiency of 31.6 dB,accompanied by notable loading property with specific modulus of 272.8 kN·m kg^(-1).This novel design concept has laid the foundation for the development of insulation materials in more complex extreme environments.

关键词： Multi-hybrid aerogel Metal-phenolic coordination Thermal insulation EMI shielding Convertibility and multifunctionality

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基于无人机LiDAR技术的森林资源精细化调查与监测

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经纬天地 2024年第4期 86-89页

作者：侯希山西省测绘地理信息院山西太原030001

森林资源对全球生态平衡和生物多样性维护至关重要。为准确了解森林资源状况,利用无人机LiDAR技术,针对中国东北针叶林进行精细化调查与长期监测。通过多旋翼无人机和高精度LiDAR传感器,获取高精度三维点云数据,提取森林结构参数并建立... 详细信息

森林资源对全球生态平衡和生物多样性维护至关重要。为准确了解森林资源状况,利用无人机LiDAR技术,针对中国东北针叶林进行精细化调查与长期监测。通过多旋翼无人机和高精度LiDAR传感器,获取高精度三维点云数据,提取森林结构参数并建立生物量估算模型。结果表明:无人机LiDAR技术高效、精确、可靠,能为森林资源管理提供新技术手段。长期监测数据显示,树高、冠层密度和生物量均呈增加趋势,证明该技术在森林资源调查和监测中的重要应用价值。

关键词：无人机LiDAR 森林结构参数生物量估算

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