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| 1 | Adaptive optimization of agile organization of command and control resource显示文摘Adaptive optimization is one of the means that agile organization of command and control resource (AOC2R)adapts for the dynamic battlefield environment.A math model of the adaptive optimization of AOC2R is put forward by analyzing the interrelating concept and research.The model takes the adaptive process as a multi-stage decision making problem.The 2-phases method is presented to calculate the model,which obtains the related parameters by running the colored Petri net(CPN)model of AOC2R and then searches for the result by ant colony optimization(ACO)algorithm integrated with genetic optimization techniques.The simulation results demonstrate that the proposed algorithm greatly improves the performance of AOC2R. | Yang Chunhui Liu Junxian Chen Honghui Luo Xueshan | 2009 | Journal of Systems Engineering and Electronics2009，20，3： | 8 |
| 2 | Bacterioplankton production in dilution zone of the Changjiang (Yangtze) Estuary显示文摘The bacterioplankton production and bacterioplankton abundance were surveyed in dilution zone of the Changjiang Estuary and a mesocosm experimental device for enriched phosphate experiment and oil contaminated experiment was placed in the waters nearby Luhua Island during October 1997 and May 1998. The results showed that the average bacterioplankton production in spring was higher than that in autumn, the production at the surface water was higher than that at the bottom in the surveyed area; the higher values appeared in the middle of the area. The results from mesocosm experiment with adding phosphate and oil contaminated showed that the bacterioplankton production increased rising trend day by day during the experiment period. | Liu Zilin 1,2 , Koshikawa Hiroshi 3, Ning Xiuren 1,2 , Shi Junxian 2, Cai Yuming 1,21.KeyLaboratoryofSubmarineGeosciences,StateOceanicAdministration,China2.SecondInstituteofOceanography,StateOceanicAdministration,Hangzhou310012,China3.Nationa | 2001 | Acta Oceanologica Sinica2001，20，1： | 3 |
| 3 | Influence of cosmic radiation on lymphocyte micronucleus,serum lipid peroxide and antioxidation capacity in aircrew members显示文摘This study looks into the influence of cosmic radiation at high altitudes on human bodies. Results reveal that the cytokinesis-block micronuclei (CBMN) and conventional cultured micronuclei in peripheral blood lymphocytes, serum levels of lipid peroxide, superoxide dismutase, and the total antioxidation capacity by chemical colorimetry all increased significantly in aircrew members. There exists a linear relationship between the CBMN and the average annual effective doses of radiation received or the average annual flying hours. With both of them, a trend shows that the serum lipid peroxide levels increase as well. Either the lipid peroxide or CBMN can sensitively reflect the recent changes in flight load. These findings indicate that cosmic radiation impairs the stability of chromosomes and genome, and induces lipid oxidative damage in aircrews; Lymphocyte CBMN and serum lipid peroxide can be used as monitoring indicators in the cosmic radiation protection for aircrew members. | CHEN Weiru FENG Yingjin LIU Jiangkuang ZHANG Haili GUO Ying ZHANG Yan DUAN Shiying PENG Xintao SUN Tianping JIA Baoshan ZHAO Junxian LI Hua | 2002 | Chinese Science Bulletin2002，47，8： | 3 |
| 4 | Ru(bpy)_(3)^(2+)-sensitized{001}facets LiCoO_(2) nanosheets catalyzed CO_(2) reduction reaction with 100% carbonaceous products显示文摘Photosensitized heterogeneous CO_(2) reduction(PHCR)has emerged as a promising means to convert CO_(2) into valuable chemicals,however,challenged by the relatively low carbonaceous product selectivity caused by the competing hydrogen evolution reaction(HER).Here,we report a PHCR system that couples Ru(bpy)32+photosensitizer with{001}faceted LiCoO_(2) nanosheets photocatalyst to simultaneously yield 21.2 and 722μmol·g^(-1)·h^(-1) of CO,and 4.42 and 108μmol·g^(-1)·h^(-1) of CH4 under the visible light and the simulated sunlight irradiations,respectively,with completely suppressed HER.The experimental and theoretical studies reveal that the favored CO_(2) adsorption on the exposed Li sites on{001}faceted LiCoO_(2) surface is responsible for the completely suppressed HER. | Shuaiyu Jiang Junxian Liu Kun Zhao Dandan Cui Porun Liu Huajie Yin Mohammad Al-Mamun Sean ELowe Weiping Zhang Yu Lin Zhong Jun Chen Yun Wang Dan Wang Huijun Zhao | 2022 | Nano Research2022，15，2： | 2 |
| 5 | Community structure of picoplankton abundance and biomass in the southern Huanghai Sea during the spring and autumn of 2006显示文摘During spring and autumn of 2006,the investigations on abundance,carbon biomass and distribution of picoplankton were carried out in the southern Huanghai Sea(Yellow Sea,sHS) . Three groups of picoplankton-Synechococcus(Syn) ,Picoeukaryotes(PEuk) and heterotrophic bacteria(BAC) were identified,but Prochlorococcus(Pro) was undetected. The average abundance of Syn and PEuk was lower in spring(5.0 and 1.3 × 10 3 cells/cm 3,respectively) than in autumn(92.4 and 2.7 × 10 3 cells/cm 3,respectively) ,but it was opposite for BAC(1.3 and 0.7 × 10 6 cells/cm 3 in spring and autumn,respectively) . And the total carbon biomass of picoplankton was higher in spring(37.23 ± 11.67) mg/m 3 than in autumn(21.29 ± 13.75) mg/m 3 . The ratios of the three cell abundance were 5:1:1 341 and 30:1:124 in spring and autumn,respectively. And the ratios of carbon biomass of them were 5:7:362 and 9:4:4 in spring and autumn,respectively. Seasonal distribution characteristics of Syn,PEuk,BAC were quite different from each other. In spring,Syn abundance decreased in turn in the central waters(where phytoplankton bloom in spring occurred) ,the southern waters and inshore waters of the Shandong Peninsula(where even Syn was undetected) ;the high values of PEuk abundance appeared in the central and southern waters and the inshore of the Shandong Peninsula;the abundance of BAC was nearly three order of magnitude higher than that of photosynthetic picoplankton,and high values appeared in the central waters. In autumn,Syn abundance in central waters was higher than that in surrounding waters,while for PEuk abundance,it decreased in turn in the inshore waters of the Shandong Peninsula,the southern waters and the central waters;BAC presented a complicated blocky type distribution. Sub-surface maximum of each group of picopalnkton appeared in both spring and autumn. Compared with the available literatures concerning the studied area,the range of Syn abundance was larger,and the abundance of BAC was higher. In addition,the conversion factors for calculating picoplanktonic carbon biomass were discussed,with the conversion factors which are different from previous studies in the same surveyed waters. The result of regression analysis showed that there was distinct positive correlation between BAC and photosynthetic picoplankton in spring(r=0.61,P <0.001) ,but no correlation was found in autumn. | LE Fengfeng NING Xiuren LIU Chenggang HAO Qiang SHI Junxian | 2010 | Acta Oceanologica Sinica2010，29，1： | 2 |
| 6 | Effects of water deficit and high N fertilization on wheat storage protein synthesis,gluten secondary structure,and breadmaking quality显示文摘The content and composition of wheat storage proteins are the major determinants of dough rheological properties and breadmaking quality and are influenced by cultivation conditions.This study aimed to investigate the effects of water deficit and high N-fertilizer application on wheat storage protein synthesis,gluten secondary structure,and breadmaking quality.Reverse-phase ultrahigh-performance liquid chromatography analysis showed that storage protein and gluten macropolymer accumulation was promoted under both independent applications and a combination of water-deficit and high N-fertilizer treatments.Fourier-transform infrared spectroscopy showed that water deficit and high N-fertilizer treatments generally improved protein secondary structure formation and lipid accumulation,and reduced flour moisture.In particular,high N-fertilizer application increasedβ-sheet content by 10.4%and the combination of water-deficit and high N-fertilizer treatments increased random coil content by 7.6%.These changes in gluten content and secondary structure led to improved dough rheological properties and breadmaking quality,including superior loaf internal structure,volume,and score.Our results demonstrate that moderately high N-fertilizer application under drought conditions can improve gluten accumulation,gluten secondary structure formation,and baking quality. | Junxian Liu Junwei Zhang Gengrui Zhu Dong Zhu Yueming Yan | 2022 | The Crop Journal2022，10，1： | 2 |
| 7 | Operando Converting BiOCl into Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate显示文摘Bismuth-based materials(e.g., metallic, oxides and subcarbonate) are emerged as promising electrocatalysts for converting CO_(2) to formate. However, Bio-based electrocatalysts possess high overpotentials, while bismuth oxides and subcarbonate encounter stability issues. This work is designated to exemplify that the operando synthesis can be an effective means to enhance the stability of electrocatalysts under operando CO_(2)RR conditions. A synthetic approach is developed to electrochemically convert Bi^(O)Cl into Cl-containing subcarbonate(Bi_(2)O_(2)(CO_(3))_(x)Cl_(y)) under operando CO_(2)RR conditions. The systematic operando spectroscopic studies depict that BiOCl is converted to Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) via a cathodic potential-promoted anion-exchange process. The operando synthesizedBi_(2)O_(2)(CO_(3))_(x)Cl_(y) can tolerate-1.0 V versus RHE, while for the wet-chemistry synthesized pure Bi_(2)O_(2)CO_(3),the formation of metallic Bio occurs at-0.6 V versus RHE. At-0.8 V versus RHE, Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) can readily attain a FEHCOO-of 97.9%,much higher than that of the pure Bi_(2)O_(2)CO_(3)(81.3%). DFT calculations indicate that differing from the pure Bi_(2)O_(2)CO_(3)-catalyzed CO_(2)RR, where formate is formed via a *OCHO intermediate step that requires a high energy input energy of 2.69 eV to proceed, the formation of H COO-over Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) has proceeded via a *COOH intermediate step that only requires low energy input of 2.56 eV. | Huai Qin Fu Junxian Liu Nicholas M.Bedford Yun Wang Joshua Wright Peng Fei Liu Chun Fang Wen Liang Wang Huajie Yin Dongchen Qi Porun Liu Hua Gui Yang Huijun Zhao | 2022 | Nano-Micro Letters2022，14，7： | 1 |
| 8 | Effects of Exposure to Lead and Cadmium on the Oxidative Damage of Livers in Laying Hens显示文摘[Objective] To detect the effects of exposure to lead and cadmium on the oxidative damage of livers in laying hens. [Methods] One hundred and twenty 40-week-old Hyline brown hens were randomly divided into four groups. 100 mg / L Pb and / or 50 mg / L Cd was added into the drinking water for eight weeks. [Results] Compared with control group,AST and ALT activities in Pb group enhanced; but there were no significant differences. AST and ALT activities in Cd group and( Pb + Cd) group significantly or extremely significantly increased( P < 0. 05 or P < 0. 01). SOD activity,GSH- Px activity and GSH content in( Pb + Cd) group,Cd group and Pb group were significantly or extremely significantly lower than those in control group( P <0. 05 or P <0. 01). Among them,( Pb + Cd) group showed the greatest reduction( P <0. 01). MDA contents in the three groups were significantly higher than that of control group; and( Pb +Cd) group was significantly higher than Pb group and Cd group. Cu,Fe and Zn contents in three groups were higher than those in control group in different degrees( P <0. 05 or P <0. 01). Se contents in Cd group and( Pb + Cd) group were significantly lower than that in control group( P <0. 01). Residue contents in livers in Pb group and Cd group were significantly greater than that in control group; while residue content in( Pb + Cd) group was significantly higher than those in Pb group and Cd group. Ultrastructure showed that there were symptoms of mitochondrial swelling and fractured cristae in liver cells of laying hens after the exposure to Cd and Pb. In( Pb + Cd) group,these symptoms were even greater. [Conclusion] Oxidative damage and disturbance of trace element metabolism were one of the mechanisms for hepatotocity in laying hens induced by Pb and Cd,and synergistic effect lied in the coadministration. | Chen Dawei Pu Junhua Tang Xiujun Lu Junxian Liu Yinyin Jia Xiaoxu Ge Qinglian Gao Yushi | 2014 | Animal Husbandry and Feed Science2014，6，5： | 1 |
| 9 | Effects of Seed Soaking with Paclobutrazol on Tillering and Physio-logical Characteristics of Sugarcane Seedlings显示文摘In order to study the effects of seed soaking with Paclobutrazol( PP333) on the tillering and physiological characteristics of sugarcane seedlings,sugar cane variety ROC22 was used as experimental material. The effects of seed soaking with different concentrations of PP333 were studied. The tiller number and growth of sugarcane were surveyed at the 6-leaf stage,the physiological indicators such as chlorophyll content,soluble protein content,proline content and peroxidase activity were measured at the 2-leaf,4-leaf,and 6-leaf stages. The results showed that the seed soaking with PP333 can effectively improve the tillering of sugarcane seedlings. The suitable concentration for the tillering of sugarcane and the growth and development of sugarcane was of 50 mg/L; the seed soaking with PP333 significantly increased the chlorophyll,soluble protein,proline,and peroxidase activity of leaves of sugarcane seedlings; the content of chlorophyll and soluble protein in leaves of sugarcane seedlings treated with 90 mg/L PP333 was the highest,and the proline content and peroxidase activity of sugarcane treated with 50 mg/L PP333 were the highest. | Junxian LIU Song LI Fang TAN Xin LIU Yibo HE Kaichao WU Faqian XIONG Limin LIU | 2017 | Asian Agricultural Research2017，9，1： | 1 |
| 10 | Functionality evaluation of system of systems architecture based on extended influence diagrams显示文摘System of systems architecture(SoSA) has received increasing emphasis by scholars since Zachman ignited its flame in 1987. Given its complexity and abstractness, it is critical to validate and evaluate SoSA to ensure requirements have been met.Multiple qualities are discussed in the literature of SoSA evaluation, while research on functionality is scarce. In order to assess SoSA functionality, an extended influence diagram(EID) is developed in this paper. Meanwhile, a simulation method is proposed to elicit the conditional probabilities in EID through designing and executing SoSA. An illustrative anti-missile architecture case is introduced for EID development, architecture design, and simulation. | ZHANG Mengmeng CHEN Honghui ZHANG Xiaoxue LUO Aimin LIU Junxian | 2018 | Journal of Systems Engineering and Electronics2018，29，3： | 1 |
| 11 | A new method for fabrication of graphene/polyaniline nanocomplex modified microbial fuel cell anodes显示文摘 | Hou Junxian Liu Zhongliang | 2013 | Journal of Power Sources2013，224，： | 1 |
| 12 | Science with the 2.5-meter Wide Field Survey Telescope(WFST)显示文摘The Wide Field Survey Telescope(WFST) is a dedicated photometric surveying facility being built jointly by University of Science and Technology of China(USTC) and the Purple Mountain Observatory(PMO). It is equipped with a 2.5-meter diameter primary mirror, an active optics system, and a mosaic CCD camera with 0.73 gigapixels on the primary focal plane for highquality image capture over a 6.5-square-degree field of view. The installation of WFST near the summit of Saishiteng mountain in the Lenghu region is scheduled in summer of 2023, and the operation is planned to start three months later. WFST will scan the northern sky in four optical bands(u, g, r and i) at cadences from hourly/daily in the deep high-cadence survey(DHS) program, to semi-weekly in the wide field survey(WFS) program. During a photometric night, a nominal 30 s exposure in the WFS program will reach a depth of 22.27, 23.32, 22.84, and 22.31(AB magnitudes) in these four bands, respectively, allowing for the detection of a tremendous amount of transients in the low-z universe and a systematic investigation of the variability of Galactic and extragalactic objects. In the DHS program, intranight 90 s exposures as deep as 23(u) and 24 mag(g), in combination with target of opportunity follow-ups, will provide a unique opportunity to explore energetic transients in demand for high sensitivities, including the electromagnetic counterparts of gravitational wave events, supernovae within a few hours of their explosions,tidal disruption events and fast, luminous optical transients even beyond redshift of unity. In addition, the final 6-year co-added images, anticipated to reach g■25.8 mag in WFS or 1.5 mags deeper in DHS, will be of fundamental importance to general Galactic and extragalactic science. The highly uniform legacy surveys of WFST will serve as an indispensable complement to those of the Vera C. Rubin Observatory's Legacy Survey of Space and Time(LSST) that monitors the southern sky. | Tinggui Wang Guilin Liu Zhenyi Cai Jinjun Geng Min Fang Haoning He Ji-an Jiang Ning Jiang Xu Kong Bin Li Ye Li Wentao Luo Zhizheng Pan Xuefeng Wu Ji Yang Jiming Yu Xianzhong Zheng Qingfeng Zhu Yi-Fu Cai Yuanyuan Chen Zhiwei Chen Zigao Dai Lulu Fan Yizhong Fan Wenjuan Fang Zhicheng He Lei Hu Maokai Hu Zhiping Jin Zhibo Jiang Guoliang Li Fan Li Xuzhi Li Runduo Liang Zheyu Lin Qingzhong Liu Wenhao Liu Zhengyan Liu Wei Liu Yao Liu Zheng Lou Han Qu Zhenfeng Sheng Jianchun Shi Yiping Shu Zhenbo Su Tianrui Sun Hongchi Wang Huiyuan Wang Jian Wang Junxian Wang Daming Wei Junjie Wei Yongquan Xue Jingzhi Yan Chao Yang Ye Yuan Yefei Yuan Hongxin Zhang Miaomiao Zhang Haibin Zhao Wen Zhao | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，10： | 1 |
| 13 | Two new completely integrable systems related to the KdV equation hierarchy 显示文摘 | Gu Zhuquan Zhang Junxian Liu Wei | 2008 | IL NUOVO CIMENTO2008，123，5： | 1 |
| 14 | Scientific objectives of the Hot Universe Baryon Surveyor(HUBS) mission显示文摘The Hot Universe Baryon Surveyor(HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spatially-resolved high-resolution spectroscopy and large field of view,the HUBS mission will be uniquely qualified to measure the physical and chemical properties of the hot gas in the interstellar medium, the circumgalactic medium, the intergalactic medium, and the intracluster medium. These measurements will be valuable for two key scientific goals of HUBS, namely to unravel the AGN and stellar feedback physics that governs the formation and evolution of galaxies, and to probe the baryon budget and multi-phase states from galactic to cosmological scales. In addition to these two goals, the HUBS mission will also help us solve some problems in the fields of galaxy clusters, AGNs, difuse X-ray backgrounds, supernova remnants, and compact objects. This paper discusses the perspective of advancing these fields using the HUBS telescope. | Joel Bregman Renyue Cen Yang Chen Wei Cui Taotao Fang Fulai Guo Edmund Hodges-Kluck Rui Huang Luis C.Ho Li Ji Suoqing Ji Xi Kang Xiaoyu Lai Hui Li Jiangtao Li Miao Li Xiangdong Li Yuan Li Zhaosheng Li Guiyun Liang Helei Liu Wenhao Liu Fangjun Lu Junjie Mao Gabriele Ponti Zhijie Qu Chenxi Shan Lijing Shao Fangzheng Shi Xinwen Shu Lei Sun Mouyuan Sun Hao Tong Junfeng Wang Junxian Wang Q.Daniel Wang Song Wang Tinggui Wang Weiyang Wang Zhongxiang Wang Dandan Xu Haiguang Xu Heng Xu Renxin Xu Xiaojie Xu Yongquan Xue Hang Yang Feng Yuan Shuinai Zhang Yuning Zhang Zhongli Zhang Yuanyuan Zhao Enping Zhou Ping Zhou | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，9： | 1 |
| 15 | Period bifurcations and their transitions to chaos in the standard mapping显示文摘 | Liu Junxian Chen Guangzhi Wang Guangrui | 1989 | China Phys (USA)1989，9，： | 1 |
| 16 | A Probe-Shaped Sensor With FBG and Fiber-Tip Bubble for Pressure and Temperature Sensing显示文摘A probe-shaped sensor for simultaneous temperature and pressure measurement was reported in this article.The effective length of the sensor was〜2 mm,consisting of a fiber Bragg grating(FBG)and a Fabry-Perot interferometer(FPI)with a nano silica diaphragm.The response sensitivities of the sensor for pressure and temperature were measured as-0.98 nm/MPa and 11.10pm/℃,respectively.This sensor had an extremely low cross-sensitivity between pressure and temperature,which provided a significant potential in dual-parameter sensing. | Bonan LIU Junxian LUO Shen LIU Yanping CHEN Bo HUANG Changrui LIAO Yiping WANG | 2021 | Photonic Sensors2021，11，4： | 1 |
| 17 | Resource allocation approach to associate business-IT alignment to enterprise architecture design显示文摘Enterprise architecture(EA) development is always a superior way to address business-IT alignment(BITA) issue.However, most EA design frameworks are inadequate to allocate IT resources, which is an important metric of BITA maturity. Under this situation, the idea of IT resource allocation is combined with the EA design process, in order to extend prior EA research on BITA and to demonstrate EA's capability of implementing IT governance. As an effective resource allocation method, portfolio decision analysis(PDA) is used to align business functions of business architecture and applications of system architecture. Furthermore, this paper exhibits an illustrative case with the proposed framework. | ZHANG Mengmeng CHEN Honghui LIU Junxian | 2019 | Journal of Systems Engineering and Electronics2019，30，2： | 1 |
| 18 | Effect of Chicken Akirin2 Gene on Immune Response Induced by VP2 DNA Vaccine of Infectious Bursal Dis-ease Virus显示文摘In order to investigate the effect of chicken Akirin2 gene on the immune response induced by VP2 DNA vaccine of infectious bursal disease virus( IBDV). [Methods] The 14-day-old SPF chickens were immunized with recombinant plasmids expressing VP2 protein and Akirin2 protein,and strengthened immunization was conducted at the 14 thday after the first immunization. Finally,test chickens were challenged with IBDVBC6-85 virulent strain. [Resultss]Test results showed that Akirin2 gene could enhance the specific immune response induced by VP2 DNA vaccine,improve the proliferation of peripheral blood lymphocytes and affect the expressing of cytokines TNF-α,IFN-γ,IL-1β,IL-2,IL-4,IL 6,IL-9,IL-10,IL-17 and IL-18. Effects of recombinant plasmids co-expressing Akirin2 protein and VP2 protein on cytokine expression showed some differences with the recombinant plasmids expressing Akirin2 protein or VP2 protein along. [Conclusions] Chicken Akirin2 gene could significantly enhance the humoral immune response and cellular immune response induced by VP2 DNA vaccine of IBDV. | Liu Chuangao Zhong Chuhong Ren Guangcai Zhu Jiaojiao Zhao Dawei Ye Junxian Zhao Bing Wen Lianghai Chen Ruiai | 2017 | Animal Husbandry and Feed Science2017，9，2： | 0 |
| 19 | Modeling the dynamic alignment of business and information systems via the lens of human-centered architecture evolution显示文摘The complexity of business and information systems(IS)alignment is a growing concern for researchers and practitioners alike.The extant research on alignment architecture fails to consider the human viewpoint,which makes it difficult to embrace emergent complexity.This paper contributes to the extant literature in the following ways.First,we combine an enterprise architecture(EA)framework with a human viewpoint to address alignment issues in the architecture design phase;second,we describe a dynamic alignment model by developing a humancentered meta-model that explains first-and second-order changes and their effects on alignment evolution.This paper provides better support for the theoretical research and the practical application of dynamic alignment. | ZHANG Mengmeng YI Shuanghui CHEN Honghui LUO Aimin LIU Junxian ZHANG Xiaoxue | 2021 | Journal of Systems Engineering and Electronics2021，32，4： | 0 |
| 20 | A sample of active galactic nuclei with strong soft X-ray variabilities显示文摘Large-amplitude X-ray variation is a special feature of AGN,reflecting possible extreme change in the central engine or the absorption along the line of sight.Till now there are only a few relevant studies on individual sources or rather small samples.In this work we aim to perform a systematic study of AGNs with strong soft X-ray variations at timescale of 10 years.To build the sample,we compare the soft X-ray fluxes of AGNs measured in ROSAT All-Sky Survey(RASS)during 1990–1991 with those measured by XMM-Newton during 2000–2009.This investigation bings forth to a sample of 13 AGNs,which appeared bright in RASS era,and went into low states(flux dropped by a factor of 10)when they were caught by XMM-Newton.Most of the 13sources are type I Seyfert galaxies.5 of them are noticed to have strong X-ray variation for the first time.We study the nature of their variations through performing XMM-Newton spectral analyses and by collecting reports from the existing literature.We find the sample could be divided into three categories according to the possible causes of the strong X-ray variations.The variations in MRK 0478 and 1H 0419-557 are consistent with strong light-bending effect,i.e.,the observed X-ray flux drops significantly as the X-ray emitting corona gets much closer to the central black hole.The variations in ESO 140-G043 and NGC 7158 are caused by absorption changes along the line of sight.For one special case MRK 0335,the variation can be explained by either light-bending or absorption variation.In the rest 8 sources(~60%),the strong soft X-ray variations are likely to exist due to intrinsic changes in the activities of the corona,although in some of them without high quality X-ray spectra we are unable to rule out alternative models.This sample provides good targets for future monitoring campaigns with more extensive studies. | BI Da LIU Teng WANG JunXian | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，4： | 0 |
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