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17篇 您的检索式:作者名="Xikun Zhang"
    题名 作者 年代 出处 被引量
1Comprehensive Marine Observing Experiment Based on High-Altitude Large Unmanned Aerial Vehicle(South China Sea Experiment2020 of the “Petrel Project”)显示文摘In collaboration with 12 other institutions, the Meteorological Observation Center of the China Meteorological Administration undertook a comprehensive marine observation experiment in the South China Sea using the Yilong-10 high-altitude large unmanned aerial vehicle(UAV). The Yilong-10 UAV carried a self-developed dropsonde system and a millimeter-wave cloud radar system. In addition, a solar-powered unmanned surface vessel and two drifting buoys were used. The experiment was further supported by an intelligent, reciprocating horizontal drifting radiosonde system that was deployed from the Sansha Meteorological Observing Station, with the intent of producing a stereoscopic observation over the South China Sea. Comprehensive three-dimensional observations were collected using the system from 31 July to2 August, 2020. This information was used to investigate the formation and development processes of Typhoon Sinlaku(2020). The data contain measurements of 21 oceanic and meteorological parameters acquired by the five devices, along with video footage from the UAV. The data proved very helpful in determining the actual location and intensity of Typhoon Sinlaku(2020). The experiment demonstrates the feasibility of using a high-altitude, large UAV to fill in the gaps between operational meteorological observations of marine areas and typhoons near China, and marks a milestone for the use of such data for analyzing the structure and impact of a typhoon in the South China Sea. It also demonstrates the potential for establishing operational UAV meteorological observing systems in the future, and the assimilation of such data into numerical weather prediction models.Xuefen ZHANG Liangxu LI Rongkang YANG Ran GUO Xia SUN Jianping LUO Hongbin CHEN Daxin LIU Kebing TANG Wenwu PENG Xiaodong HAN Qiyun GUO Xiaoxia LI Xikun FEI 2021Advances in Atmospheric Sciences2021,38,4:4
2Prussian Blue Analogues in Aqueous Batteries and Desalination Batteries显示文摘In the applications of large-scale energy storage,aqueous batteries are considered as rivals for organic batteries due to their environmentally friendly and low-cost nature.However,carrier ions always exhibit huge hydrated radius in aqueous electrolyte,which brings difficulty to find suitable host materials that can achieve highly reversible insertion and extraction of cations.Owing to open threedimensional rigid framework and facile synthesis,Prussian blue analogues(PBAs)receive the most extensive attention among various host candidates in aqueous system.Herein,a comprehensive review on recent progresses of PBAs in aqueous batteries is presented.Based on the application in different aqueous systems,the relationship between electrochemical behaviors(redox potential,capacity,cycling stability and rate performance)and structural characteristics(preparation method,structure type,particle size,morphology,crystallinity,defect,metal atom in highspin state and chemical composition)is analyzed and summarized thoroughly.It can be concluded that the required type of PBAs is different for various carrier ions.In particular,the desalination batteries worked with the same mechanism as aqueous batteries are also discussed in detail to introduce the application of PBAs in aqueous systems comprehensively.This report can help the readers to understand the relationship between physical/chemical characteristics and electrochemical properties for PBAs and find a way to fabricate high-performance PBAs in aqueous batteries and desalination batteries.Chiwei Xu Zhengwei Yang Xikun Zhang Maoting Xia Huihui Yan Jing Li Haoxiang Yu Liyuan Zhang Jie Shu 2021Nano-Micro Letters2021,13,11:4
3Cu3(PO4)2: Novel Anion Convertor for Aqueous Dual‑Ion Battery显示文摘Electrode materials which can reversibly react with anions are of interest for aqueous dual-ion batteries.Herein,we propose a novel anion electrode,Cu3(PO4)2,for constructing an aqueous dual-ion cell.The Cu3(PO4)2 electrode can operate in a quasi-neutral condition and deliver a reversible capacity of 115.6 mAh g^−1 with a well-defined plateau at−0.17 V versus Ag/AgCl.Its reaction mechanism shows that Cu3(PO4)2 decomposes into Cu2O and subsequently is converted into Cu during the initial discharge process.In the following charge process,Cu is oxidized into Cu2O.It suggests Cu3(PO4)2 reacts with OH−ions instead of PO43−ions after the initial discharge process and its potential thereby depends upon the OH−ions concentration in electrolyte.Additionally,an aqueous dual-ion cell is built by using pretreated Cu3(PO4)2 and Na0.44MnO2 as anode and cathode,respectively.During cycling,OH−ions and Na^+ions in electrolyte can be stored and released.Such a cell can provide a discharge capacity of 52.6 mAh g^−1 with plateaus at 0.70 and 0.45 V,exhibiting the potential of application.This work presents an available aqueous dual-ion cell and provides new insights into renewable energy storage and adjustment of the OH−ions concentration in aqueous buffer solution.Haoxiang Yu Chenchen Deng Huihui Yan Maoting Xia Xikun Zhang Zhen‑Bo Wang Jie Shu 2021Nano-Micro Letters2021,13,3:3
4Hydrogen Bond-Assisted Ultra-Stable and Fast Aqueous NH_(4)^(+)Storage显示文摘Aqueous ammonium ion batteries are regarded as eco-friendly and sustainable energy storage systems.And applicable host for NH_(4)^(+)in aqueous solution is always in the process of development.On the basis of density functional theory calcula-tions,the excellent performance of NH_(4)^(+)insertion in Prussian blue analogues(PBAs)is proposed,especially for copper hexacyanoferrate(CuHCF).In this work,we prove the outstanding cycling and rate performance of CuHCF via electrochemical analyses,delivering no capacity fading during ultra-long cycles of 3000 times and high capacity retention of 93.6%at 50 C.One of main contributions to superior performance from highly reversible redox reaction and structural change is verified during the ammoniation/de-ammoniation progresses.More importantly,we propose the NH_(4)^(+)diffusion mechanism in CuHCF based on con-tinuous formation and fracture of hydrogen bonds from a joint theoretical and experimental study,which is another essential reason for rapid charge transfer and superior NH_(4)^(+)storage.Lastly,a full cell by coupling CuHCF cathode and polyaniline anode is constructed to explore the practical application of CuHCF.In brief,the outstanding aqueous NH_(4)^(+)storage in cubic PBAs creates a blueprint for fast and sustainable energy storage.Xikun Zhang Maoting Xia Haoxiang Yu Junwei Zhang Zhengwei Yang Liyuan Zhang Jie Shu 2021Nano-Micro Letters2021,13,9:2
5Synthesis,Characterization and Electromagnetic Studies on Nanocrystalline Nickel Zinc Ferrite by Polyacrylamide Gel显示文摘Nanocrystalline 镍锌铁酸盐粉末(Ni_xZni_(1-x ) Fe2O4,为 x=0 的 A,为 x=0.2 的 B,为 x=0.5 的 C,为 x-0.8 的 D 和为 x=1 的 E ) 被聚丙烯酰氨综合胶化方法。X 光检查衍射(XRD ) ,传播电子显微镜学(TEM ) 和波导被用来描绘作文。弄干的胶化粉末是非结晶的 XRD 结果表演,和特征尖晶石Ni_( 0.5 )Zn_( 0.5 ) Fe2O4 达到顶点在胶化为锻烧的温度是的 1 h.When 在 400 °C 被锻烧以后,出现 600 和 800 °C ,平均谷物尺寸被是 10 和 30 nm 的 TEM 识别, respectively.The Ni_xZn_( 1-x ) Fe2O4 粉末在Ni^(2+)离子的增加满足的 8.2-11.0GHz .With 的频率范围有绝缘的损失和磁性的损失,当时,绝缘的参数(epsilon')和Ni_xZn_( 1-x ) Fe2O4 粉末的渗透(mu')减少绝缘的损失( epsilon “),磁性的损失(亩”)并且思考损失增加。Ruiting MA Yi WANG Yanwen TIAN Chunli ZHANG Xikun LI 2008Journal of Materials Science & Technology2008,24,3:2
6Synthesis of SrAl_2O_4:Eu^(2+),Dy^(3+) phosphors by the coupling route of microemulsion with coprecipitation method显示文摘Nano-sized SrAl2O4:Eu2+,Dy3+ phosphors with good monodispersity and narrow size distribution were synthe- sized by the coupling of water-in-oil (W/O) microemulsion with coprecipitation method. The phase composition, morphol- ogy, crystallinity, excitation spectra, emission spectra, and afterglow decay of SrAl2O4:Eu2+,Dy3+ nanophosphors were measured. It was found that the amount of surfactant that was used had an important effect on the shape and average size of the phosphor particles. SrAl2O4 phase of the phosphors showed an increase with the increase in calcination temperature. When the calcination temperature reached 1150°C, the fine crystal of SrAl2O4 was formed and the long afterglow lumines- cence could be obviously observed. In comparison with the samples prepared by the high-temperature solid-state method, the calcination temperature showed an obvious decrease and a clear blue shift occurred in the excitation and emission spec- tra of the sample. The afterglow time could be more than 8 h.SUN Yanbin QIU Guanming LI Xikun ZHANG Shengqu YAN Changhao ZHANG Xinyu 2006Rare Metals2006,25,6:2
7Au@Pt core-shell nanoparticles supported on multiwalled carbon nanotubes for methanol oxidation显示文摘Yangyang Xu Yingnan Dong Jin Shi Mingli Xu Zhengfu Zhang Xikun Yang 2011Catalysis Communications2011,,:1
8Polystyrene nanoplastics aggravated ecotoxicological effects of polychlorinated biphenyls in on zebrafish(Danio rerio)embryos显示文摘In view of the accumulation of nanoplastics(NPs)in the food chain of environment and animals,and the good adsorption properties of nano-plastics to toxic substances,it is necessary to explore the influence of NPs in living organisms.In this study,single and joint toxicological effects of polystyrene nanoplastics(PS-NPs,size 80 nm)and polychlorinated biphenyls(PCBs),were explored in freshwater aquatic animal model zebrafish(Danio rerio).Our study found that exposure to single PS-NPs induced mild acute toxicity,albeit the combined exposure of PS-NPs and polychlorinated biphenyls aggravated the toxicity of PCBs in a dose-dependent manner.Results from gene expression profiling showed that NPs exposure could activate detoxification process,resulting in a slight up-regulation of antioxidant genes(sod1,gstp1),bone development genes(bmp2,bmp4)and cardiac gene(tbx20);while PCBs suppressed the detoxification through down-regulation of these genes,and the addition of NPs will exacerbate the impact of PCBs on gene suppression.Importantly,the results of in vivo purification experiments found that NPs showed prolonged retention in liver,intestine and gills of zebrafish and they might have crossed biological barrier and accumulate in lipid-rich tissues and excretion does not appear as the significant pathway for their elimination.In conclusion,the toxic effects of polychlorinated biphenyls on chorionic protected embryos were not significant as zebrafish chorion plays an important role in resisting the invasion of pollutants;PCBs can seriously damage the bone and heart development of zebrafish,while the presence of NPs significantly enhanced the toxicity of PCBs in zebrafish,which is an alarming concern for growing NPs levels and ecological safety in aquatic environment.Yizheng Li Shulin Liu Qiuping Wang Yanling Zhang Xikun Chen Lei Yan Muhammad Junaid Jun Wang 2022Geoscience Frontiers2022,13,3:1
9Evidence for a therapeutic effect of Braintone on ischemic brain damage显示文摘This study used a novel combination of in vivo and in vitro experiments to show that Braintone had neuroprotective effects and clarified the molecular mechanisms underlying its efficacy. The Chinese herbal extract Braintone is composed of Radix Rhodiolase Essence, Radix Notoginseng Essence, Folium Ginkgo Essence and Rhizoma Chuanxiong. In vivo experiments showed that cerebral infarction volume was reduced, hemispheric water content decreased, and neurological deficits were alleviated in a rat model of permanent middle cerebral artery occlusion after administration of 87.5, 175 or 350 mg/kg Braintone for 7 consecutive days. Western blot analysis showed that Braintone enhanced the expression of hypoxia-inducible factor 1α, heme oxygenase-1 and vascular endothelial growth factor in the ischemic cortex of these rats. The 350 mg/kg dose of Braintone produced the most dramatic effects. For the in vitro experiments, prior to oxygen-glucose deprivation, rats were intragastrically injected with 440, 880 or 1 760 mg/kg Braintone to prepare a Braintone-containing serum, which was used to pre-treat human umbilical vein endothelial cells for 24 hours. Human umbilical vein endothelial cell injury was alleviated with this pre-treatment. Western blot and real-time PCR analysis showed that the Braintone-containing serum increased the levels of hypoxia-inducible factor 1α mRNA and protein, heme oxygenase-1 protein and vascular endothelial growth factor mRNA in oxygen-glucose deprived human umbilical vein endothelial cells. The 1 760 mg/kg dose produced the greatest increases in expression. Collectively, these experimental findings suggest that Braintone has neuroprotective effects on ischemia-induced brain damage via the up-regulation of hypoxia-inducible factor 1α, heme oxygenase-1 and vascular endothelial growth factor expression in vascular endothelial cells.Yuanyuan Qin Yu Luo Weiwei Gu Lei Yang Xikun Shen Zhenlun Gu Huiling Zhang Xiumei Gao 2013Neural Regeneration Research2013,8,19:0
10Chronic pulmonary bacterial infection facilitates breast cancer lung metastasis by recruiting tumor-promoting MHCII^(hi) neutrophils显示文摘Breast cancer can metastasize to various organs,including the lungs.The immune microenvironment of the organs to be metastasized plays a crucial role in the metastasis of breast cancer.Infection with pathogens such as viruses and bacteria can alter the immune status of the lung.However,the effect of chronic inflammation caused by bacteria on the formation of a premetastatic niche within the lung is unclear,and the contribution of specific immune mediators to tumor metastasis also remains largely undetermined.Here,we used a mouse model revealing that chronic pulmonary bacterial infection augmented breast cancer lung metastasis by recruiting a distinct subtype of tumor-infiltrating MHCII^(hi) neutrophils into the lung,which exhibit cancer-promoting properties.Functionally,MHCII^(hi) neutrophils enhanced the lung metastasis of breast cancer in a cell-intrinsic manner.Furthermore,we identified CCL2 from lung tissues as an important environmental signal to recruit and maintain MHCII^(hi) neutrophils.Our findings clearly link bacterial-immune crosstalk to breast cancer lung metastasis and define MHCII^(hi) neutrophils as the principal mediator between chronic infection and tumor metastasis.Teng Ma Yu Tang Taolin Wang Yang Yang Yige Zhang Ruihuan Wang Yongxin Zhang Yi Li Mingbo Wu Miao Tang Xueli Hu Chaoyu Zou Yuan Ren Huan Liu Qianhua Zhang Heyue Li Min Wu Jing Li Xikun Zhou 2023Signal Transduction and Targeted Therapy2023,8,9:0
11China and US Strategic Choices and China’s Relations with Its Neighbors显示文摘Strategic competition between China and the United States has gradually intensified while the relationship between China and neighboring countries has stabilized.The implementation of an ' America First'policy along with a decline in US strategic credibility is prompting China's neighbors to adopt a more cooperative stance toward China.China's positive response to those gestures and its continued strategic reassurance improve China's strategic credibility.Allaying their security concerns lays a foundation for continuous improvement of China's neighboring security environment.It is imperative for China to grasp this opportunity to resolve disputes with its neighbors to ease its rise dilemma.Sun Xuefeng Zhang Xikun 2019Contemporary International Relations2019,29,5:0
12Studies on the Development of Walnut Industry in Shangluo City Based on SWOT显示文摘The walnut industry in Shangluo City is evaluated based on SWOT. The internal advantage,disadvantage,external opportunities and threats to the walnut industry are found out. In the end,suggestions towards the development of walnut industry in Shangluo City are put forward.Yan ZHANG Xikun HONG 2014Asian Agricultural Research2014,6,12:0
13Correction to:Prussian Blue Analogues in Aqueous Batteries and Desalination Batteries显示文摘Correction to:Nano‑Micro Lett.(2021)13:166 https://doi.org/10.1007/s40820-021-00700-9 In the published article the authors equal contribution statement is incorrect in the foot note.The correct statement should be read as“Chiwei Xu and Zhengwei Yang have contributed equally to this work”.Chiwei Xu Zhengwei Yang Xikun Zhang Maoting Xia Huihui Yan Jing Li Haoxiang Yu Liyuan Zhang Jie Shu 2021Nano-Micro Letters2021,13,11:0
14Aqueous batteries:from laboratory to market显示文摘As estimated up to 2022,global installed capacity of lithium-ion batteries(LIBs)has increased dramatically from 148 to 580 GWh in the past five years.Their wide range of applications is mainly attributed to their high energy density,excellent cycle life,and low self-discharge rate[1].Xikun Zhang Pengcheng Xing Thomas LMadanu Jing Li Jie Shu Bao-Lian Su 2023National Science Review2023,10,11:0
15PNb_(9)O_(25) nanofiber as a high-voltage anode material for advanced lithium ions batteries显示文摘If the operating voltage of anode materials is below 1.0 V versus Lit/Li,the side reaction between electrolyte and anode materials will occur extensively.Thus,high-voltage anode materials have aroused interest recently.In this work,we report the preparation of PNb9O25 nanofiber via a facile electrospinning method.The PNb9O25 nanofiber shows the high rate performance and excellent cycling performance when it is used as anode in lithium ions batteries.For instance,the PNb9O25 nanofiber can deliver a capacity of 233,212.1,193.8,and 181.4 mA h g^(-1) at 0.2,1,3,and 6C,respectively.After 1000 cycles,it can reach at 134.3 mA h g^(-1) with capacity retention of 70.9%.Meanwhile,the ex situ X-ray photoelectron spectroscopy technique has been adopted to investigate the evolution in valence state of each element for PNb9O25 nanofiber.In addition,the PNb9O25 nanofiber is chosen as the anode material in lithium ion full cell in this work,demonstrating the potential for practical application.Haoxiang Yu Jundong Zhang Maoting Xia Chenchen Deng Xikun Zhang Runtian Zheng Shi Chen Jie Shu Zhen-Bo Wang 2020Journal of Materiomics2020,6,4:0
16Computational methodology for ChlP-seq analysis显示文摘Hyunjin Shin Tao Liu Xikun Duan Yong Zhang X. Shirley Liu 2013Frontiers of Electrical and Electronic Engineering in China2013,8,1:0
17PRAP-PIM:A weight pattern reusing aware pruning method for ReRAM-based PIM DNN accelerators显示文摘Resistive Random-Access Memory(ReRAM)based Processing-in-Memory(PIM)frameworks are proposed to accelerate the working process of DNN models by eliminating the data movement between the computing and memory units.To further mitigate the space and energy consumption,DNN model weight sparsity and weight pattern repetition are exploited to optimize these ReRAM-based accelerators.However,most of these works only focus on one aspect of this software/hardware codesign framework and optimize them individually,which makes the design far from optimal.In this paper,we propose PRAP-PIM,which jointly exploits the weight sparsity and weight pattern repetition by using a weight pattern reusing aware pruning method.By relaxing the weight pattern reusing precondition,we propose a similarity-based weight pattern reusing method that can achieve a higher weight pattern reusing ratio.Experimental results show that PRAP-PIM achieves 1.64×performance improvement and 1.51×energy efficiency improvement in popular deep learning benchmarks,compared with the state-of-the-art ReRAM-based DNN accelerators.Zhaoyan Shen Jinhao Wu Xikun Jiang Yuhao Zhang Lei Ju Zhiping Jia 2023High-Confidence Computing2023,3,2:0
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