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The Origin and Acceleration of ~3He and Heavy Ions in the 2000 July 14 Event

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Chinese Journal of Astronomy and Astrophysics 2007年第1期7卷 141-147页

作者： Gui-Ping Wu Guang-Li huang yu-hua tang yu Dai Department of Physics Southeast University Nanjing 210096 Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 Department of Astronomy Nanjing University Nanjing 210093

According to the evolutionary properties of the flare, halo coronal mass ejection （CME）, enrichments of 3He ions in the energy range of 3.5-26 MeV nucl^-1 and Ne, Mg, Si and Fe ions in the energy range of 8.5-15 MeV nucl^- 1, we argue that the 3He and heavy ions originate in the middle corona （-0.1-1 R⊙） with well-connected open field lines to the Earth, where the magnetic reconnection leads to acceleration of the electrons and the production of type-ll burst during the decay phase of the soft X-ray emission. The acceleration of 3He and heavy ions may have been accomplished in two stages： first H-He ion-ion hybrid waves may be easily excited by the energetic electron beams produced in the middle corona, and these waves are preferentially absorbed by ZHe and heavy ions due to their frequency being near the fundamental gyro frequency of the ZHe ions and harmonic gyro frequency of Ne, Mg, Si and Fe ions. These preheated ions escape into interplanetary space along the open field lines and may be further accelerated to tens of MeV nucl^- 1 by CME-driven shock. The theoretical calculations show that the ZHe and heavy ions may be accelerated to the energy of - MeV nucl^-1 by the ion-ion hybrid waves and be further accelerated to the energy of -100 MeV nucl^-1 by the shock wave： these are basically consistent with the observations.

关键词： Sun abundances-waves-shock wave-acceleration of particles

Solar Energetic Particle Event of 2005 January 20:Release Times and Possible Sources

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Chinese Journal of Astronomy and Astrophysics 2006年第6期6卷 751-758页

作者： Gui-Ming Le yu-hua tang Yan-Ben Han National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites China Meteorological Administration Beijing 100081 Department of Aslronomy NanjingUniversity Nanjing 210093 National Center for Space Weather China Meteorological Administration Beijing 100081

Based on cosmic ray data obtained by neutron monitors at the Earth＇s surface, and data on near-relativistic electrons measured by the WIND satellite, as well as on solar X-ray and radio burst data, the solar energetic particle （SEP） event of 2005 January 20 is studied. The results show that this event is a mixed event where the flare is dominant in the acceleration of the SEPs, the interplanetary shock accelerates mainly solar protons with energies below 130 MeV, while the relativistic protons are only accelerated by the solar flare. The interplanetary shock had an obvious acceleration effect on relativistic electrons with energies greater than 2 MeV. It was found that the solar release time for the relativistic protons was about 06：41 UT, while that for the near-relativistic electrons was about 06：39 UT. The latter turned Out to be about 2 rain later than the onset time of the interplanetary type HI burst.

关键词： Sun flare - Sun particle acceleration - shock acceleration - interplanetary propagation

Synthetic analysis of a two-ribbon microflare

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Research in Astronomy and Astrophysics 2010年第1期10卷 83-90页

作者： Cheng Fang Peng-Fei Chen Rong-Lin Jiang yu-hua tang Department of Astronomy Nanjing University Nanjing 210093 China

High-resolution Stokes spectral data of Hα, Ca Ⅱ 8542A, and Fe 16302.5A lines for a two-ribbon microflare （TRMF） were simultaneously obtained by the THEMIS telescope on 2002 September 5. We derive the intensity, velocity, and longitudinal magnetic field maps. The hard X-ray emission observed by RHESSI provides evidence of nonthermal particle acceleration in the TRMF. Using Ha and Ca Ⅱ 8542A line profiles and a non-LTE calculation, we obtain semi-empirical atmospheric models for the two brightest kernels of the TRME Our result indicates that the temperature enhancement in the chromosphere is more than 2500 K. The kinetic and radiative energies at the kernels are also estimated, resulting in an estimate of the total energy of the TRMF of about 2.4×10^29 erg. Observations indicate that the TRMF results from the low coronal magnetic reconnection following the eruption of a small fila- ment. However, the local temperature ＂bump＂ in the chromosphere presents a puzzle for such a standard flare model. A possible solution to this is discussed.

关键词： Sun chromosphere- Sun flares - Sun activity - Sun magnetic fields

Geoeffectiveness of the coronal mass ejections associated with solar proton events

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Research in Astronomy and Astrophysics 2016年第1期16卷 117-128页

作者： Gui-Ming Le Chuan Li yu-hua tang Liu-Guan Ding Zhi-Qiang Yin yu-Lin Chen Yang-Ping Lu Min-Hao Chen Zhong-Yi Li Key Laboratory of Space Weather National Center for Space Weather China Meteorological Administration Beijing 100081 China School of Astronomy and Space Science Nanjing University Xianlin Campus Nanjing 210046 China National Astronomical Observatories Chinese Academy of-Sciences Beijing 100012 China School of Mathematics and Statistics Nanjing University of Information Science and Technology Nanjing 210044China

The intensity-time profiles of solar proton events（SPEs） are grouped into three types in the present study. The Type-I means that the intensity-time profile of an SPE has one peak, which occurs shortly after the associated solar flare and coronal mass ejection（CME）. The Type-II means that the SPE profile has two peaks： the first peak occurs shortly after the solar eruption, the second peak occurs at the time when the CME-driven shock reaches the Earth, and the intensity of the second peak is lower than the first *** the intensity of the second peak is higher than the first one, or the SPE intensity increases continuously until the CME-driven shock reaches the Earth, this kind of intensity-time profile is defined as Type-III. It is found that most CMEs associated with Type-I SPEs have no geoeffectiveness and only a small part of CMEs associated with Type-I SPEs can produce minor（–50 n T ≤ Dst ≤–30 n T） or moderate geomagnetic storms（–100 n T≤ Dst ≤–50 n T）, but never an intense geomagnetic storm（–200 n T ≤ Dst 〈-100 n T）. However,most of the CMEs associated with Type-II and Type-III SPEs can produce intense or great geomagnetic storms（Dst ≤-200 n T）. The solar wind structures responsible for the geomagnetic storms associated with SPEs with different intensity-time profiles have also been investigated and discussed.

关键词： Sun: coronal mass ejections (CMEs) -- Sun: particle emission -- Sun: solar-terrestrial rela- tions

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A/O与氧化沟工艺处理漂染废水的比较研究

中国给水排水 2012年第13期28卷 92-94,98页

作者：余华堂广州发展新塘水务有限公司广东广州511340

根据广东省某漂染污水处理厂的实际运行情况,对A/O与氧化沟工艺的能耗、处理效果等进行比较,分别分析了两种工艺在处理漂染废水方面的的优势和劣势。结合该污水厂的实际运行情况,建议大规模漂染废水生化处理系统宜采用水解酸化/底曝氧... 详细信息

根据广东省某漂染污水处理厂的实际运行情况,对A/O与氧化沟工艺的能耗、处理效果等进行比较,分别分析了两种工艺在处理漂染废水方面的的优势和劣势。结合该污水厂的实际运行情况,建议大规模漂染废水生化处理系统宜采用水解酸化/底曝氧化沟工艺,且设计水解酸化池时应充分考虑泥水混合均匀及填料设置合理。该研究为类似工程的工艺设计、设备选型和技术改造提供了参考。

关键词：漂染废水氧化沟 A/O工艺水解酸化曝气

水解酸化/Carrousel氧化沟处理漂染废水的优化控制

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中国给水排水 2009年第8期25卷 32-34页

作者：余华堂广州市旺隆污水处理有限公司广东广州511340

某污水处理厂采用水解酸化/Carrousel氧化沟工艺处理漂染废水,由于实际进水水质、水量与设计值有偏差,造成运行管理困难且费用较高。针对该厂的实际运行状况,探讨了水解酸化的pH、氧化沟的DO浓度、MLSS、污泥负荷等参数的优化控制,确保... 详细信息

某污水处理厂采用水解酸化/Carrousel氧化沟工艺处理漂染废水,由于实际进水水质、水量与设计值有偏差,造成运行管理困难且费用较高。针对该厂的实际运行状况,探讨了水解酸化的pH、氧化沟的DO浓度、MLSS、污泥负荷等参数的优化控制,确保该工艺的处理效果稳定、酸耗低、剩余污泥少、耐冲击负荷能力强、不会发生丝状菌污泥膨胀,出水水质达到广东省《水污染物排放限值》(DB 44/26—2001)第二时段的一级标准。

关键词：漂染废水水解酸化 Carrousel氧化沟优化控制丝状菌污泥膨胀

Risk analysis of exotic species,coconut cadang-cadang viroid in China

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Risk analysis of exotic species,coconut cadang-cadang viroid...

Amino acid assisted aqueous synthesis of highly stable CsPbBr_(3)nanocrystals for cell imaging

第三届全国生物入侵大会

作者： Xiao-qing Niu,Hui Zhu,Feng-yu yu,Qing-hua tang,Wei-quan Qin Coconut Reserch Institute,Chinese Academy of Tropical Agricultural Scienes,Wenchang,571339, China

Coconut Cadang-cadang viroid(CCCVd) is a kind of exotic *** seriously harms palm *** to the need of quarantine work,the article summarized the domestic and international distribution of the viroid,the potential economic harm,the economic importance of the host plants, transmission possibilities and the management difficulties of the danger,*** the method of comprehensive multi-index evaluation,we assessed the risk of transmission and spread of CCCVd in *** result showed that the invasive risk value of CCCVd was R=2.29,which means the viroid is a highly dangerous invasive *** proposed two proposals of the risk management measures to minimize the risk of CCCVd invading China.

关键词： Coconut Cadang-cadang viroid(CCCVd) Risk analysis China

来源： cnki会议评论

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Nano Research 2025年第1期18卷 675-683页

作者： Xue Li Yanan Guo Guoying Tan Qingyi Liu Nan Song yu tang State Key Laboratory of Applied Organic Chemistry Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Lead halide perovskite nanocrystals(NCs)exhibit excellent optoelectronic performance and have drawn great interests in the fields of biological imaging and ***,the poor stability of CsPbX_(3)(X=Cl,Br,I)in water is still a challenge to hinder their practical *** this work,a facile strategy has been developed for aqueous synthesis of CsPbX_(3) nanocrystals,in which L-glutamic acid(LGlu)has been used to replace oleic acid in the synthetic *** from the synergic effects of L-Glu and oleylamine(OAm),CsPbBr_(3)nanocrystals(L-Glu/OAm-CsPbBr_(3)NCs)with high water stability have been directly prepared under a mild condition at room temperature in water,facilitated by the process of crystal phase transformation from Cs_(4)PbBr_(6) to CsPbBr_(3).L-Glu/OAm-CsPbBr_(3)NCs exhibit a high quantum yield of 85%and a narrow full width at half maximum of 16 nm,demonstrating their efficient luminescence in ***,L-Glu on the surface have contributed greatly to an acidic environment and passivation of surface defects,improving the water stability and dispersibility of CsPbBr_(3)***,L-Glu/OAm-CsPbBr_(3)NCs exhibit great biocompatibility due to the presence of L-Glu,resulting in their good performance for HeLa cell ***,we propose a facile and effective method to prepare CsPbBr_(3)nanocrystals with excellent water stability by using L-Glu and OAm as cooperated ligands and expand their application in cell imaging.

关键词： aqueous synthesis cell imaging lead halide perovskite nanocrystals L-glutamic acid phase transformation

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离子选择电极法测量氟化物不确定度评定

环境科学与技术 2005年第B6期28卷 30-31,67页

作者：邓芸文建辉余华堂桂林市环境监测中心站桂林541002 武汉大学资源与环境科学学院武汉430079

评定了用离子选择电极法测量水和废水中氟化物浓度测量结果的不确定度,含氟量所产生的不确定度、取样体积所产生的不确定度等分量合成标准不确定度。前者包括标准溶液拟合曲线、仪器精密度、标准溶液配制三个不确定度分量。假定取包含因... 详细信息

评定了用离子选择电极法测量水和废水中氟化物浓度测量结果的不确定度,含氟量所产生的不确定度、取样体积所产生的不确定度等分量合成标准不确定度。前者包括标准溶液拟合曲线、仪器精密度、标准溶液配制三个不确定度分量。假定取包含因子k=2得到扩展不确定度。

关键词：离子选择电极氟化物不确定度