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Magnetic interactions during sympathetic solar eruptions

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Chinese Journal of Astronomy and Astrophysics 2009年第5期9卷 603-612页

作者： yun-Chun jiang Yi Bi Jia-Yan Yang Rui-Sheng zheng Jing-Xiu Wang National Astronomical Observatories/yunnan Observatory Chinese Academy of Sciences Kunming 650011 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

We present the first evidence for occurrences of magnetic interactions between a jet, a filament and coronal loops during a complex event, in which two flares sequentially occurred at different positions of the same active region and were closely associated with two successive coronal mass ejections （CMEs）, respectively. The coronal loops were located outside but nearby the filament channel before the flares. The jet, originating from the first flare during its rise phase, not only hit the filament body but also met one of the ends of the loops. The filament then underwent an inclined eruption followed by the second flare and met the same loop end once more. Both the jet and the filament eruption were accompanied by the development of loop disturbances and the appearances of brightenings around the meeting site. In particular, the erupting filament showed clear manifestations of interactions with the loops. After a short holdup, only its portion passed through this site, while the other portion remained at the same place. Following the filament eruption and the loop disappearance, four dimmings were formed and located near their four ends. This is a situation that we define as ＂quadrupolar dimmings.＂ It appears that the two flares consisted of a sympathetic pair physically linked by the interaction between the jet and the filament, and their sympathy indicated that of the two CMEs. Moreover, it is very likely that the two sympathetic CMEs were simultaneously associated with the disappearing loops and the quadrupole dimmings.

关键词： Sun activity - Sun coronal mass ejections (CMEs) - Sun filaments - Sun flares - Sun magnetic fields - Sun corona

Observations of EUV and soft X-ray recurring jets in an active region

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Research in Astronomy and Astrophysics 2011年第10期11卷 1229-1242页

作者： Li-Heng Yang yun-Chun jiang Jia-Yan Yang Yi Bi Rui-Sheng zheng National Astronomical Observatories / yunnan Observatory Chinese Academy of SciencesKunming 650011 China

We present simultaneous observations of three recurring jets in EUV and soft X-ray （SXR）, which occurred in an active region on 2007 June 5. By comparing their morphological and kinematic characteristics in these two different wavelengths, we found that EUV and SXR jets had similar locations, directions, sizes and velocities. We also analyzed their spectral properties by using six spectral lines from the EUV Imaging Spectrometer （EIS） onboard Hinode and found that these jets had temperatures from 0.05 to 2.0MK and maximum electron densities from 6.6× 10^9 to 3.4× 10^10cm^-3. For each jet, an elongated blue-shifted component and a red- shifted component at the jet base were simultaneously observed in the Fe XII A195 and the He II A256 lines. The three jets had maximum Doppler velocities from 25 to 121 km s-1 in the FexII A195 line and from 115 to 232 km s -1 in the HeII A256 line. They had maximum non-thermal velocities from 98 to 181 km s-1 in the Fe xII A195 line and from 196 to 399 km s-1 in the He II A256 line. We also examined the relationship between averaged Doppler velocities and maximum ionization temperatures of these three jets and found that averaged Doppler velocities decreased with the increase of maximum ionization temperatures. In the photosphere, magnetic flux emergences and cancelations continuously took place at the jet base. These observa- tional results were consistent with the magnetic reconnection jet model, implying that magnetic reconnection between emerging magnetic flux and ambient magnetic field occurred in the lower atmosphere.

关键词： Sun activity -- Sun corona -- Sun UV radiation -- Sun magnetic fields

Coupled thermoelastic theory and associated variational principles based on decomposition of internal energy

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Acta Mechanica Sinica 2020年第1期36卷 107-115页

作者： Jia-Hong zheng zheng Zhong Cong-Ying jiang School of Aerospace Engineering and Applied Mechanics Tongji UniversityShanghai200092China School of Science Harbin Institute of Technology(Shenzhen)Shenzhen518055GuangdongChina

A new framework of coupled thermoelasticity is constructed in this paper based on a decomposition of internal energy into free internal energy and dissipative *** equations(*** and gradient equations,constitutive equations including evolving laws)along with proper boundary conditions are all included in this framework,from which two novel dual-complementary variational principles with explicit functionals are *** the conventional thermoelastic theory,the proposed variational principles for thermoelasticity are established without the approximate assumption of small temperature *** verify the usefulness of the proposed variational principles in simulating coupled thermoelastic problems,a coupled thermoelastic example is numerically implemented.

关键词： Coupled thermoelasticity Thermodynamics Dissipation Variational principle

PIPBQ Effect Aware SER Analysis for Combinational Logic Circuits

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Journal of Electronic Science and Technology 2016年第1期14卷 60-67页

作者： Ai-Bin Yan Hua-Guo Liang zheng-Feng Huang Zhi Wang Cui-yun jiang the School of Computer and Information Hefei University of Technology the School of Electronic Science & Applied Physics Hefei University of Technology the School of Mathematics Hefei University of Technology

Technology scaling results in the propagation-induced pulse broadening and quenching（PIPBQ） effect become more *** order to effectively evaluate the soft error rate for combinational logic circuits,a soft error rate analysis approach considering the PIPBQ effect is *** different original pulse propagating through logic gate cells,pulse broadening and quenching are measured by *** that,electrical effect look-up tables（EELUTs） for logic gate cells are created to evaluate the PIPBQ *** paths are accurately retrieved by the proposed re-convergence aware sensitized path search ***,by propagating pulses on these paths to simulate fault injection,the PIPBQ effect on these paths can be quantified by *** a result,the soft error rate of circuits can be effectively computed by the proposed *** results verify the soft error rate improvement comparing with the PIPBQ-not-aware method.

关键词： Pulse broadening and quenching effect re-convergence single event transient soft error rate

Thylakoid Transit Peptide Is Related to the Expression and Localization of NdhB Subunits in Soybean

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Phyton-International Journal of Experimental Botany 2021年第1期90卷 99-110页

作者： Siyi Fu Tao yun Dexuan Ma Bingsong zheng Dean jiang Yi He State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou311300China China Science and Technology Exchange Center Beijing100045China State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhou310058China

The chloroplast NAD(P)H dehydrogenase(NDH)complex,as one of the most important photosynthesis protein complexes in thylakoid membrane,is involved in photosystem I(PSI)cyclic electron transport(CEF).Under abiotic environmental stress,the photosynthetic apparatus is susceptible to the damage caused by the strong light ***,the enhancement of NDHdependent CEF could facilitate the alleviation of the damage to the photosynthetic *** NdhB subunit encoded by chloroplast genome is one of most important subunits of NDH complex and consists of 510 amino ***,according to cloning ndhB from Melrose(cultivated soybean),ACC547(wild salt-tolerant soybean),S113-6 and S111-9(hybrid descendant),based on the comparison and analysis of the sequences of NdhB subunits,we found that there is a novel thylakoid transit peptide of NdhB subunit in *** addition,crosslink immunoprecipitation,immunogold labeling and co-expression of GFP fusion protein indicated that the novel thylakoid transit peptide is favorable to the expression and localization of NdhB subunit in ***,we suggest that this novel thylakoid transit peptide plays the same role as chaperonin and contributes to facilitating the expression and localization of NdhB subunit.

关键词： NDH complex NdhB subunit thylakoid transit peptide

Studies on the Quantitative Structure-activity Relationship of Substituted Biphenyls by Density Function Theory (DFT)

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Chinese Journal of Structural Chemistry 2007年第2期26卷 229-233页

作者： HAN Xiang-yun zheng Qing Department of Chemical Engineering YanchengInstitute of Technology Jiangsu 224003 China

Geometrical configurations of 16 substituted biphenyls were computed at the B3LYP/6-311G^＊＊ level with Gaussian 98 program. Based on linear solvation energy theory, lgKow as well as the structural and thermodynamic parameters obtained at this level was taken as theoretical descriptors, and corresponding equation predicting the toxicity of Daphnia magna （-lgEC5o） was thus obtained, in which three parameters were contained, i.e., n-octanol/water partition coefficients （lgKow）, dipole moment of the molecules（ μ） and entropy （S°）. For this equation, R^2 = 0.9582, q^2 = 0.8921 and SD = 0.102. The absolute t-scores of three variables are larger than the standard one in the confidence range of 95%, which confirms the creditability and stability of this model.

关键词： substituted biphenyl linear solvation energy theory,DFT method Daphnia magna toxicity

一株同步硝化反硝化菌株的筛选及其生物电化学脱氮性能研究

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南京农业大学学报 2025年第1期48卷 133-143页

作者：田瑞瑞付欢郑云黄新琦周俊雍晓雨南京工业大学生物与制药工程学院江苏南京211816 南京师范大学地理科学学院江苏南京210023

[目的]本文旨在获得具有高效脱氮性能的异养硝化-好氧反硝化(heterotrophic nitrification-aerobic denitrification,HN-AD)功能菌株,构建生物电化学-同步硝化反硝化(bio-electrochemical systems-simultaneous nitrification and denitrification,BES-SND)耦合系统,实现脱氮效率的提升。[方法]从活性污泥中筛选HN-AD菌株,鉴定后通过摇瓶试验分析其脱氮性能。然后进一步研究碳源、C/N、溶解氧等外界因素对菌株同步硝化反硝化性能的影响。将菌株接种到微生物燃料电池(microbial fuel cells,MFC)的生物阴极,分析低C/N条件下BES-SND体系的脱氮性能。[结果]从活性污泥中筛选出一株具有同步硝化反硝化性能的HN-AD菌株,命名为Alcaligenes aquatilis N3。确定该菌株发生SND反应的最适碳源为乙酸钠、C/N值为20、溶解氧为3.70 mg·L^(-1)。在BES-SND脱氮体系中,C/N值分别为2、4、6、8时,菌株*** N3的总氮去除率分别为20.51%、26.67%、37.76%和48.50%。在C/N=2的试验条件下,BES-SND系统的总氮去除速率在第5天仍为1.79 mg·L^(-1)·d^(-1)。[结论]在低碳环境下,*** N3菌株依然可以在BES-SND耦合脱氮体系中实现脱氮,降低了脱氮过程对碳源的依赖性,具有一定的实际环境应用潜力。

关键词：同步硝化反硝化异养硝化-好氧反硝化生物电化学低C/N值微生物燃料电池

Multi-time Collaborative Restoration for Integrated Electrical-gas Distribution Systems Based on Rolling Optimization

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 660-671页

作者： Jingyang yun zheng Yan yun Zhou Peichao Zhang Weidong Hu Key Laboratory of Control of Power Transmission and Conversion of Ministry of Education Department of Electrical EngineeringShanghai Jiao Tong University

This paper proposes a multi-time collaborative restoration model for integrated electricity-gas distribution sys-tems(IEGDSs)considering multiple resources after extreme weather *** on the linearized power flow constraints of the unbalanced electrical distribution system(EDS)and gas distribution system(GDS),this problem can be formulated as a mixed-integer linear programming(MILP)*** improve the efficiency and veracity of the solution,a rolling optimiza-tion based two-stage method is developed with the first stage solved by a linear approximation model,and the second stage solved by real-time updated rolling *** solving the MILP problem using rolling optimization,the proposed model and solution method achieve efficient and reliable collaborative restoration of IEGDS considering multiple resources and unbal-anced operation characteristics of *** effectiveness of the proposed model and method is validated by using an IEGDS made of a 37-bus unbalanced EDS and 11-node *** Terms-Electricity-gas system,mix-integer linear programming,power system restoration.

关键词： Electricity-gas system mix-integer linear programming power system restoration

Effects of information transmission delay and channel blocking on synchronization in scale-free Hodgkin-Huxley neuronal networks

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Acta Mechanica Sinica 2011年第6期27卷 1052-1058页

作者： Qing-yun Wang Yan-Hong zheng Department of Dynamics and Control Beihang University 100191 Beijing China School of Mathematics and Computer Science Fujian Normal University 350007 Fuzhou China

In this paper,we investigate the evolution of spatiotemporal patterns and synchronization transitions in dependence on the information transmission delay and ion channel blocking in scale-free neuronal *** the underlying model of neuronal dynamics,we use the Hodgkin-Huxley equations incorporating channel blocking and intrinsic *** is shown that delays play a significant yet subtle role in shaping the dynamics of neuronal *** particular,regions of irregular and regular propagating excitatory fronts related to the synchronization transitions appear intermittently as the delay ***,the fraction of working sodium and potassium ion channels can also have a significant impact on the spatiotemporal dynamics of neuronal *** the fraction of blocked sodium channels increases,the frequency of excitatory events decreases,which in turn manifests as an increase in the neuronal synchrony that,however,is dysfunctional due to the virtual absence of large-amplitude ***,we also show that larger coupling strengths improve synchronization irrespective of the information transmission delay and channel *** presented results are also robust against the variation of the network size,thus providing insights that could facilitate understanding of the joint impact of ion channel blocking and information transmission delay on the spatiotemporal dynamics of neuronal networks.

关键词： Scale-free neuronal networks - Information transmission delay Ion channel blocking Synchronization