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Broken-up spectra of the loop-top hard X-ray source during a solar limb flare

Research in Astronomy and Astrophysics 2019年第12期19卷 207-216页

作者： Hao Ning Yao Chen Jeongwoo Lee Zhao Wu Yang Su xiang-liang kong Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment and Institute of Space SciencesShandong UniversityWeihai 264209China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210008China

Solar hard X-rays(HXRs) appear in the form of either footpoint sources or coronal sources. Each individual source provides its own critical information on acceleration of nonthermal electrons and plasma heating. Earlier studies found that the HXR emission in some events manifests a broken-up power-law spectrum, with the break energy around a few hundred keV based on spatially-integrated spectral analysis,and it does not distinguish the contributions from individual sources. In this paper, we report on the brokenup spectra of a coronal source studied using HXR data recorded by Reuven Ramaty High Energy Solar Spectroscopic Imager(RHESSI) during the SOL2017–09–10 T16:06(GOES class X8.2) flare. The flare occurred behind the western limb and its footpoint sources were mostly occulted by the disk. We could clearly identify such broken-up spectra pertaining solely to the coronal source during the flare peak time and after. Since a significant pileup effect on the RHESSI spectra is expected for this intense solar flare, we have selected the pileup correction factor, p = 2. In this case, we found the resulting RHESSI temperature(~30MK) to be similar to the GOES soft X-ray temperature and break energies of 45–60 keV. Above the break energy, the spectrum hardens with time from spectral index of 3.4 to 2.7, and the difference in spectral indices below and above the break energy increases from 1.5 to 5 with time. However, we note that when p = 2 is assumed, a single power-law fitting is also possible with the RHESSI temperature higher than the GOES temperature by ~10MK. Possible scenarios for the broken-up spectra of the loop-top HXR source are briefly discussed.

关键词： acceleration of particles Sun:corona Sun:flares Sun:UV radiation Sun:X-rays gamma rays

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《伤寒论》甘草量效探微

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中西医结合学报 2009年第3期7卷 268-272页

作者：杨学孔祥亮岳小强第二军医大学中医系经典著作教研室上海200433 上海中医药大学基础医学院伤寒论教研室上海201203

通过频次法和分层聚类法探求《伤寒论》中甘草的量效规律。《伤寒论》中甘草的用量主要有4个层次:1两,主要与麻黄、杏仁、桂枝配伍,用于佐制麻黄发汗太过;2两,主要与桂枝、芍药,石膏、知母,附子、干姜等配伍,具有温阳益气和养阴之效,还... 详细信息

通过频次法和分层聚类法探求《伤寒论》中甘草的量效规律。《伤寒论》中甘草的用量主要有4个层次:1两,主要与麻黄、杏仁、桂枝配伍,用于佐制麻黄发汗太过;2两,主要与桂枝、芍药,石膏、知母,附子、干姜等配伍,具有温阳益气和养阴之效,还可解附子之毒,防治热邪耗气;3两,主要与半夏、人参配伍组成小柴胡汤、泻心汤等,适用于中焦之呕吐病证;4两,主要与干姜配伍,补益兼以缓急,其证多有急、悸、利等症状。甘草在《伤寒论》中多用于虚、缓、寒证,以邪实为主者常用1、2两,以正虚为主者用3、4两。

关键词：伤寒论甘草配伍剂量效应关系药物

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Micro-strain regulation strategy to stabilize perovskite lattice based on the categories and impact of strain on perovskite solar cells

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Journal of Energy Chemistry 2025年第1期100卷 578-604页

作者： Caixia Li Wenwu Liu Shiji Da Lingbin kong Fen Ran State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology School of Materials Science and Engineering Lanzhou University of Technology

Photovoltaic metal halide perovskite solar cells(PSCs) convert light to electricity more efficiently than crystalline silicon cells, and the cost of materials used to make them is lower than that of silicon *** efficiency is not a core issue affecting the application of perovskite solar cells in special *** present, stability is the major technical encounters that hinders its further commercial development. Microstrain in PSCs is currently a significant factor responsible for the device's instability. Strain-induced ion migration is widely believed to accelerate perovskite degradation even when external stimuli are ***, it is imperative to study strain to enhance the stability of PSCs. This paper reviews recent developments to understand strain's origin and effect mechanisms on performance of PSCs, including ion migration,failure behavior, defect formation, and its effect on photoelectric properties, stability, and ***, several well-known strain management strategies are systematically introduced based on the strain effect mechanism and strain engineering on the film, providing more clues for further preparation with increased stability. The manipulation of external physical strain applied from films to entire devices has been extensively studied. Furthermore, recommendations for future research directions and chemical approaches have been provided. It is emphasized that strain engineering plays a crucial role in improving the efficiency and longevity of PSCs. Tensile strain causes rapid degradation, while moderate compressive strain and external strain control could improve properties and stability. Efforts should focus on controlling compressive strain to mitigate residual tensile strain and introducing it in a controlled manner. Future research endeavors may focus on exploring these pathways to improve the efficiency and lifespan of PSCs.

关键词： Halide perovskite solar cells Strain origins Strain effects Strain management

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HIE新生儿大脑中动脉血流动力学、脑白质密度及相关炎症因子表达水平的变化

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广东医科大学学报 2020年第4期38卷 492-494页

作者：黄月爱梁翔空曾玲广东省台山市华济医院儿科广东江门529200 广东省开平市中心医院功能科广东江门529300 广东省河源市妇幼保健院超声科广东河源517000

目的观察缺血缺氧性脑病(HIE)新生儿大脑中动脉中央支血流动力学、脑白质密度、血清特异烯醇化酶及相关炎症因子mRNA表达水平的变化情况。方法采用多普勒超声监测3组新生儿(包括HIE中度组、重度组和健康对照组)大脑中动脉中央支的舒张... 详细信息

目的观察缺血缺氧性脑病(HIE)新生儿大脑中动脉中央支血流动力学、脑白质密度、血清特异烯醇化酶及相关炎症因子mRNA表达水平的变化情况。方法采用多普勒超声监测3组新生儿(包括HIE中度组、重度组和健康对照组)大脑中动脉中央支的舒张期血液流速(Vd)、收缩期峰值血液流速(Vs)、平均血液流速(Vm)和阻力指数(RI),并测定其脑白质密度、血清特异烯醇化酶及TNF-α、IL-1β的mRNA表达水平。结果与对照组相比,中度组和重度组新生儿大脑中动脉中央支Vd、Vs、Vm、脑白质密度均明显降低,RI、血清特异烯醇化酶及TNF-α、IL-1β的mRNA表达水平则明显升高,且以重度组为甚,差异均有统计学意义(P<0.01)。结论测量HIE新生儿大脑中动脉中央支血流动力学、脑白质密度、血清特异烯醇化酶及TNF-α、IL-1βmRNA的表达水平有助于对HIE病情进行判断和评估。

关键词：新生儿缺血缺氧性脑病超声多普勒血流动力学脑白质密度特异烯醇化酶炎症因子

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Dynamic Interaction Analysis of Coupled Axial-Torsional-Lateral Mechanical Vibrations in Rotary Drilling Systems

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Structural Durability & Health Monitoring 2025年第1期19卷 77-103页

作者： Sabrina Meddah Sid Ahmed Tadjer Abdelhakim Idir kong Fah Tee Mohamed Zinelabidine Doghmane Madjid Kidouche Applied Automation Laboratory Faculty of Hydrocarbons and ChemistryUniversity of BoumerdesBoumerdes35000Algeria Institute of Electrical and Electronic Engineering(IGEE) University of BoumerdesBoumerdes35000Algeria Laboratory of the Electrification of Industrial Enterprises University of BoumerdesBoumerdes35000Algeria Electrical Engineering Department Mohamed Boudiaf University of M’silaM’sila28000Algeria Department of Civil and Environmental Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Construction and Building Materials King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

Maintaining the integrity and longevity of structures is essential in many industries,such as aerospace,nuclear,and *** achieve the cost-effectiveness of large-scale systems in petroleum drilling,a strong emphasis on structural durability and monitoring is *** study focuses on the mechanical vibrations that occur in rotary drilling systems,which have a substantial impact on the structural integrity of drilling *** study speciﬁcally investigates axial,torsional,and lateral vibrations,which might lead to negative consequences such as bit-bounce,chaotic whirling,and high-frequency *** events not only hinder the efﬁciency of drilling but also lead to exhaustion and harm to the system’s components since they are difﬁcult to be detected and controlled in real *** study investigates the dynamic interactions of these vibrations,speciﬁcally in their high-frequency modes,usingﬁeld data obtained from measurement while ***ﬁndings have demonstrated the effect of strong coupling between the high-frequency modes of these vibrations on drilling sys-tem *** obtained results highlight the importance of considering the interconnected impacts of these vibrations when designing and implementing robust control ***,integrating these compo-nents can increase the durability of drill bits and drill strings,as well as improve the ability to monitor and detect ***,by exploiting theseﬁndings,the assessment of structural resilience in rotary drilling systems can be ***,the study demonstrates the capacity of structural health monitoring to improve the quality,dependability,and efﬁciency of rotary drilling systems in the petroleum industry.

关键词： Rotary drilling systems mechanical vibrations structural durability dynamic interaction analysis ﬁeld data analysis

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A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang Wei Kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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Neutron diffraction studies of permanent magnetic materials

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Rare Metals 2020年第1期39卷 13-21页

作者： Wen-Yun Yang Dong liang xiang-Dong kong Jin-Bo Yang State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing100871China Collaborative Innovation Center of Quantum Matter Beijing100871China Beijing Key Laboratory for Magnetoeletric Materials and Devices Beijing100871China Department of Micro-nano Fabrication Technology Institute of Electrical EngineeringChinese Academy of SciencesBeijing100871China

Neutron diffraction technology as an advanced material research technique has special advantages in studying magnetic materials compared to the conventional techniques such as X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).In this review,the applications of neutron diffraction technology on permanent magnetic materials were briefly reviewed:(1)the determination of the crystal structure and magnetic structure of the typical permanent magnet material,(2)in situ neutron diffraction study of the crystal structure evolution of the permanent magnets,and(3)phase transition in permanent magnetic materials.

关键词： Neutron diffraction Permanent magnetic materials Crystal structure Magnetic structure Structure evolution Phase transition

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The School that Changes Mindsets

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China Today 2025年第1期74卷 62-64页

作者： GUO QING kong SIQI 不详

China’s highest-altitude primary school is not only teaching children of farmers and herders but their parents as *** Sinopec Primary School in Nagqu,a city in Xizang Autonomous Region in southwest China,is known as the school“the closest to the sky”due to its high-altitude location-a breathtaking 4,700 meters above sea *** by oil and gas giant Sinopec as part of its corporate social responsibility,the school opened in 2012 and has since become a microcosm of China’s drive for education,especially in remote and rural areas,to ensure that no one is left behind.

关键词： altitude farmers southwest

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Synthesis and optical activity of isosorbide chiral derivative containing fluorocarbon group as chiral dopant in liquid crystal materials

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Chinese Chemical Letters 2011年第12期22卷 1447-1450页

作者： kong liang Xie Yin He Su Chun xiang Zhang College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China

Novel isosorbide derivative containing perfluorocarbon group,bi（perfluorooctanesulfonyl）isosorbide ester as chiral dopant in liquid crystal,was *** structure was characterized by elemental analysis,FT-IR,~1H NMR and ^（19）F *** optical texture of the mixture was observed by polarized optical microscopy（POM）.Novel chiral dopant containing perfluorocarbon group had excellent optical *** specific rotation and molar rotation were noticeable higher than those of bi（4-chloromethylbenzenecarbonic）isosorbide *** fluorocarbon group improved the molar rotation of chiral compound and did not affect optical rotation *** texture of the mixture added isosorbide derivative with fluorocarbon group showed the oily streak texture.

关键词： Optical properties Surfaces Texture Liquid crystal Fluorocarbon

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Facile Synthesis of the Magnetic Metal Organic Framework Fe_3O_4@UiO-66-NH_2 for Separation of Strontium

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Biomedical and Environmental Sciences 2018年第6期31卷 483-488页

作者： YIN liang liang kong xiang Yin ZHANG Yao JI Yan Qin Key Laboratory of Radiological Protection and Nuclear Emergency National Institute for Radiological ProtectionChinese Center for Disease Control and Prevention

A magnetic metal organic framework（MMOF） was synthesized and used to separate Sr^2＋ in aqueous solution. The shape and structure of prepared Fe3O4@UiO-66-NH2 were characterized, and the absorbed concentration of strontium was determined through inductively coupled plasma mass spectrometry. The results indicated that Fe3O4 and UiO-66-NH2 combined through chemical bonding. The experimental adsorption results for separation of Sr^2＋ in aqueous solution indicated that the adsorption of Sr^2＋ to Fe3O4@UiO-66-NH2 increased drastically from pH 11 to pH 13. The adsorption isotherm model indicated that the adsorption of Sr^2＋ conformed to the Freundlich isotherm model（R2 = 0.9919）. The MMOF thus inherited the superior qualities of magnetic composites and metal organic frameworks, and can easily be separated under an external magnetic field. This MMOF thus has potential applications as a magnetic adsorbent for low level radionuclide （90）Sr.

关键词： Magnetic metal organic framework(MMOF) Fe3O4@UiO-66-NH2 Radioactivity Strontium Adsorbents

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