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Large-Area Gravure-Printed AgNWs Electrode on Water/Oxygen Barrier Substrate for Long-Term Stable Large-Area Flexible Organic Solar Cells

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Chinese Journal of Chemistry 2024年第5期42卷 478-484页

作者： Hao Wang Yaqin Pan yunfei han Zhuo Chen Tianyu Liu Lianping Zhang Qun Luo Chang-Qi Ma Printable Electronics Research Center & i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS)SuzhouJiangsu215123 China Nano Science and Technology Institute University of Science and Technology of China166 Ren Ai RoadSEID SIPSuzhouJiangsu215123 China

Large-area AgNWs electrodes(25 cm×10 cm)were fabricated through roll-to-roll printing on the polyvinyl alcohol(PVA)modified water and oxygen barrier substrate.The modification of the barrier film with PVA improved the wettability of silver nanowires on the barrier films and led to the formation of homogenous large-area AgNWs networks.The mechanical flexibility,especially the adhesion force between the silver electrode and the barrier film substrate was dramatically improved through PVA modification.The efficiency of 13.51%for the flexible OSCs with an area of 0.64 cm2 was achieved based on the PET/barrier film/PVA/AgNWs electrode.The long-term stability showed the flexible OSCs based on the PET/barrier film/PVA/AgNWs electrode have a significantly improved stability relative to the device on PET/AgNWs electrode,and comparable air stability as the rigid device with glass/ITO device.The unencapsulated devices maintained nearly 50%of the original efficiency after storage for 600 h in air.After a simple top encapsulation,the flexible devices remained at 60%of the initial efficiency after 2000 h in the air.Therefore,the flexible AgNWs electrode based on the barrier film would have the potential to improve the air storage stability of organic flexible solar cells.

关键词： Flexible organic solar cell AgNWs electrode Air storage stability Barrier films substrate Energy conversion Flexible electronics Interface

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Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 235-247页

作者： Zexin Zhao Weijiang Chen Zhichang Yang Guoliang Zhao Bin han yunfei Xu Nianwen Xiang Shulai Wang China Electric Power Research Institute Beijing 100192China State Grid Corporation of China Beijing 100031China State Grid Smart Grid Research Institute Beijing 102209China State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research InstituteBeijing 102211China Hefei University of Technology Hefei 230009China

The modular multilevel matrix converter(M3C)is a potential frequency converter for low-frequency AC transmission.However,capacitor voltage control of high-voltage and largecapacity M3C is more difficult,especially for voltage balancing between branches.To solve this problem,this paper defines sequence circulating components and theoretically analyzes the influence mechanism of different sequence circulating components on branch capacitor voltage.A fully decoupled branch energy balancing control method based on four groups of sequence circulating components is proposed.This method can control capacitor voltages of nine branches in horizontal,vertical and diagonal directions.Considering influences of both circulating current and voltage,a cross decoupled control is designed to improve control precision.Simulation results are taken from a low-frequency transmission system based on PSCAD/EMTDC,and effectiveness and precision of the proposed branch energy balancing control method are verified in the case of nonuniform parameters and an unbalanced power system.

关键词： Branch energy balancing control decoupled control low-frequency AC transmission modular multilevel matrix converter(M3C) sequence circulating components

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Application Research on Two-Layer Threat Prediction Model Based on Event Graph

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Computers, Materials & Continua 2023年第12期77卷 3993-4023页

作者： Shuqin Zhang Xinyu Su yunfei han Tianhui Du Peiyu Shi School of Computer Science Zhongyuan University of TechnologyZhengzhouHEN037China

Advanced Persistent Threat(APT)is now the most common network assault.However,the existing threat analysis models cannot simultaneously predict the macro-development trend and micro-propagation path of APT attacks.They cannot provide rapid and accurate early warning and decision responses to the present system state because they are inadequate at deducing the risk evolution rules of network threats.To address the above problems,firstly,this paper constructs the multi-source threat element analysis ontology(MTEAO)by integrating multi-source network security knowledge bases.Subsequently,based on MTEAO,we propose a two-layer threat prediction model(TL-TPM)that combines the knowledge graph and the event graph.The macro-layer of TL-TPM is based on the knowledge graph to derive the propagation path of threats among devices and to correlate threat elements for threat warning and decision-making;The micro-layer ingeniously maps the attack graph onto the event graph and derives the evolution path of attack techniques based on the event graph to improve the explainability of the evolution of threat events.The experiment’s results demonstrate that TL-TPM can completely depict the threat development trend,and the early warning results are more precise and scientific,offering knowledge and guidance for active defense.

关键词： Knowledge graph multi-source data fusion network security threat modeling event graph absorbing Markov chain threat propagation path

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Threat Modeling and Application Research Based on Multi-Source Attack and Defense Knowledge

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Computers, Materials & Continua 2023年第10期77卷 349-377页

作者： Shuqin Zhang Xinyu Su Peiyu Shi Tianhui Du yunfei han School of Computer Science Zhongyuan University of TechnologyZhengzhouChina

Cyber Threat Intelligence(CTI)is a valuable resource for cybersecurity defense,but it also poses challenges due to its multi-source and heterogeneous nature.Security personnel may be unable to use CTI effectively to understand the condition and trend of a cyberattack and respond promptly.To address these challenges,we propose a novel approach that consists of three steps.First,we construct the attack and defense analysis of the cybersecurity ontology(ADACO)model by integrating multiple cybersecurity databases.Second,we develop the threat evolution prediction algorithm(TEPA),which can automatically detect threats at device nodes,correlate and map multisource threat information,and dynamically infer the threat evolution process.TEPA leverages knowledge graphs to represent comprehensive threat scenarios and achieves better performance in simulated experiments by combining structural and textual features of entities.Third,we design the intelligent defense decision algorithm(IDDA),which can provide intelligent recommendations for security personnel regarding the most suitable defense techniques.IDDA outperforms the baseline methods in the comparative experiment.

关键词： Multi-source data fusion threat modeling threat propagation path knowledge graph intelligent defense decision-making

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Association between physical activity and risk of gastroesophageal reflux disease:A systematic review and meta-analysis

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Journal of Sport and Health Science 2024年第5期13卷 687-698页

作者： Chuting Yu Tinglu Wang Ye Gao yunfei Jiao Huishan Jiang Yan Bian Wei Wang han Lin Lei Xin Luowei Wang Department of Gastroenterology Changhai HospitalNaval Medical UniversityShanghai 200433China National Clinical Research Center for Digestive Diseases(Shanghai) Shanghai 200433China

Background:Lifestyle plays an important role in preventing and managing gastroesophageal reflux disease(GERD).In response to the conflicting results in previous studies,we performed a systematic review and meta-analysis to investigate this association.Methods:Relevant studies published until January 2023 were retrieved from 6 databases,and the prevalence of symptomatic gastroesophageal reflux(GER)or GERD was determined from the original studies.A random effects model was employed to meta-analyze the association by computing the pooled relative risk(RR)with 95%confidence intervals(95%CIs).Furthermore,subgroup and dose-response analyses were performed to explore subgroup differences and the association between cumulative physical activity(PA)time and GERD.Results:This meta-analysis included 33 studies comprising 242,850 participants.A significant negative association was observed between PA and the prevalence of symptomatic GER(RR=0.74,95%CI:0.66-0.83;p<0.01)or GERD(RR=0.80,95%CI:0.76-0.84;p<0.01),suggesting that engaging in PA might confer a protective benefit against GERD.Subgroup analyses consistently indicated the presence of this association across nearly all subgroups,particularly among the older individuals(RR_(<40 years):RR_(≥40 years)=0.85:0.69,p<0.01)and smokers(RR_(smoker):RR_(non-smoker)=0.67:0.82,p=0.03).Furthermore,a dose-response analysis revealed that individuals who engaged in 150 min of PA per week had a 72.09%lower risk of developing GERD.Conclusion:Maintaining high levels of PA decreased the risk of GERD,particularly among older adults and smokers.Meeting the recommended PA level of 150 min per week may significantly decrease the prevalence of GERD.

关键词： Physical activity Gastroesophageal reflux disease Prevalence Systematic review

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OsASHL1 and OsASHL2,two members of the COMPASS-like complex,control floral transition and plant development in rice

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Journal of Genetics and Genomics 2022年第9期49卷 870-880页

作者： Guangxin Zhao Jingying Wang Xi Chen hanjing Sha Xin Liu yunfei han Guankai Qiu Fantao Zhang Jun Fang Key Laboratory of Soybean Molecular Design Breeding Northeast Institute of Geography and AgroecologyChinese Academy of SciencesHarbinHeilongjiang 150081China University of Chinese Academy of Sciences Beijing 100049China College of Agriculture Northeast Agricultural UniversityHarbinHeilongjiang 150030China College of Life Sciences Jiangxi Normal UniversityNanchangJiangxi 330022China

COMPASS or COMPASS-like is a highly conserved polyprotein complex in eukaryotes that is often involved in methylation of histone H3 lysine 4(H3K4).However,the biological function of this complex in rice(Oryza sativa)is unclear.Here,we report the identifiction of their functions in growth and development.The osashl1osashl2 double mutant shows a dwarf and late-flowering phenotype.Lower expression of Ehd1,OsVIL4,and OsMADS51 in the osashl1 osashl2 double mutant background accompanies a delayed vegetative growth phase and photoperiod-sensitive phase compared with that in wild type.Notably,there is less H3K4mono-,di-and tri-methylation genome-wide in the double mutant,in particular less H3K4 tri-methylation at OsVIL4.Consistent with this result,knockout of OsVIL4 gives rise to a late-flowering phenotype similar to that of the osashl1 osashl2 double mutant,suggesting that OsVIL4 is a target of the COMPASS-like complex.In addition,the expression of key genes in brassinosteroid and gibberellic acid metabolism is altered in the osashl1 osashl2 double mutant,suggesting that the COMPASS-like complex regulates plant growth and development by modulating the levels of these two phytohormones.In summary,we demonstrate that OsASHL1 and OsASHL2 are important for floral transition and plant development.

关键词： Rice(Oryza sativa) OsASHL1 OsASHL2 Flowering COMPASS-like H3K4 methylation

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Salt-assisted vapor-liquid-solid growth of high-quality ultrathin nickel oxide flakes for artificial synapses in image recognition applications

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Nano Research 2024年第5期17卷 4622-4630页

作者： Hui Zhang Zongjie Shen Alei Li Lin Wang Qinan Wang yunfei Li Yunlei Zhong Juntong Zhu Yong Zhang Mengjiao han Dan Tian Chun Zhao Lixing Kang Qingwen Li School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Division of Advanced Materials Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China College of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215123China Songshan Lake Materials Laboratory Dongguan 523808China School of Advanced Technology Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China

Transition metal oxides have attracted intense interest owing to their abundant physical and chemical properties.The controlled preparation of large-area,high-quality two-dimensional crystals is essential for revealing their inherent properties and realizing high-performance devices.However,fabricating two-dimensional(2D)transition metal oxides using a general approach still presents substantial challenges.Herein,we successfully achieve highly crystalline nickel oxide(NiO)flakes with a thickness as thin as 3.3 nm through the salt-assisted vapor-liquid-solid(VLS)growth method,which demonstrated exceptional stability under ambient conditions.To explore the great potential of the NiO crystal in this work,an artificial synapse based on the NiO-flake resistive switching(RS)layer is investigated.Short-term and long-term synaptic behaviors are obtained with external stimuli.The artificial synaptic performance provides the foundation of the neuromorphic application,including handwriting number recognition based on artificial neuron network(ANN)and the virtually unsupervised learning capability based on generative adversarial network(GAN).This pioneering work not only paves new paths for the synthesis of 2D oxides in the future but also demonstrates the substantial potential of oxides in the field of neuromorphic computing.

关键词： nickel oxide(NiO)flakes vapor-liquid-solid(VLS)growth memristor synapse generative adversarial network(GAN)

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Efficacy and safety of human umbilical cord-derived mesenchymal stem cells in the treatment of refractory immune thrombocytopenia:a prospective,single arm,phase I trial

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Signal Transduction and Targeted Therapy 2024年第5期9卷 2250-2259页

作者： yunfei Chen Yanmei Xu Ying Chi Ting Sun Yuchen Gao Xueqing Dou Zhibo han Feng Xue Huiyuan Li Wei Liu Xiaofan Liu Huan Dong Rongfeng Fu Mankai Ju Xinyue Dai Wentian Wang Yueshen Ma Zhen Song Jundong Gu Wei Gong Renchi Yang Lei Zhang State Key Laboratory of Experimental Hematology National Clinical Research Centre for Blood DiseasesHaihe Laboratory of Cell EcosystemTianjin Key Laboratory of Gene Therapy for Blood DiseasesCAMS Key Laboratory of Gene Therapy for Blood DiseasesInstitute of Hematology&Blood Diseases HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjin 300020China Tianjin Institutes of Health Science Tianjin 301600China National Clinical Research Center for Hematologic Diseases Jiangsu Institute of HematologyThe First Affiliated Hospital of Soochow UniversitySuzhou 215006China National Engineering Research Centre of Cell Products Tianjin Key Laboratory of Engineering Technologies for Cell PharmaceuticalAmCellGene Engineering Co.LtdTianjin 300457China School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical College100730 BeijingChina

Patients with refractory immune thrombocytopenia(ITP)frequently encounter substantial bleeding risks and demonstrate limited responsiveness to existing therapies.Umbilical cord-derived mesenchymal stem cells(UC-MSCs)present a promising alternative,capitalizing on their low immunogenicity and potent immunomodulatory effects for treating diverse autoimmune disorders.This prospective phase I trial enrolled eighteen eligible patients to explore the safety and efficacy of UC-MSCs in treating refractory ITP.The research design included administering UC-MSCs at escalating doses of 0.5×10^(6)cells/kg,1.0×10^(6)cells/kg,and 2.0×10^(6)cells/kg weekly for four consecutive weeks across three cohorts during the dose-escalation phase,followed by a dose of 2.0×10^(6)cells/kg weekly for the dose-expansion phase.Adverse events,platelet counts,and changes in peripheral blood immunity were monitored and recorded throughout the administration and follow-up period.Ultimately,12(with an addition of three patients in the 2.0×10^(6)cells/kg group due to dose-limiting toxicity)and six patients were enrolled in the dose-escalation and dose-expansion phase,respectively.Thirteen patients(13/18,72.2%)experienced one or more treatment emergent adverse events.Serious adverse events occurred in four patients(4/18,22.2%),including gastrointestinal hemorrhage(2/4),profuse menstruation(1/4),and acute myocardial infarction(1/4).The response rates were 41.7%in the dose-escalation phase(5/12,two received 1.0×10^(6)cells/kg per week,and three received 2.0×10^(6)cells/kg per week)and 50.0%(3/6)in the dose-expansion phase.The overall response rate was 44.4%(8/18)among all enrolled patients.To sum up,UC-MSCs are effective and well tolerated in treating refractory ITP(ClinicalTrials.gov ID:NCT04014166).

关键词： doses immunity treatment

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An Experimental Analysis of Gas-Liquid Flow Breakdown in a T-Junction

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Fluid Dynamics & Materials Processing 2024年第6期20卷 1381-1392页

作者： Lihui Ma Zhuo han Wei Li Guangfeng Qi Ran Cheng Yuanyuan Wang Xiangran Mi Xiaohan Zhang yunfei Li Technical Inspection Center Sinopec Shengli Oilfield CompanyDongying257000China New Energy Development Center Sinopec Shengli Oilfield CompanyDongying257000China China National Oil and Gas Exploration and Development Company Ltd.Beijing100034China

When a gas-liquid two-phase flow(GLTPF)enters a parallel separator through a T-junction,it generally splits unevenly.This phenomenon can seriously affect the operation efficiency and safety of the equipment located downstream.In order to investigate these aspects and,more specifically,the so-called bias phenomenon(all gas and liquid flowing to one pipe,while the other pipe is a liquid column that fluctuates up and down),laboratory experiments were carried out by using a T-junction connected to two parallel vertical pipes.Moreover,a GLTPF prediction model based on the principle of minimum potential energy was introduced.The research results indicate that this model can accurately predict the GLTPF state in parallel risers.The boundary of the slug flow and the churn flow in the opposite pipe can be predicted.Overall,according to the results,the pressure drop curves of the two-phase flow in the parallel risers are basically the same when there is no bias phenomenon,but the pressure drop in the parallel riser displays a large deviation when there is a slug flow-churn flow.Only when the parallel riser is in a state of asymmetric flow and one of the risers produces churn flow,the two-phase flow is prone to produce the bias phenomenon.

关键词： Two-phase flow T-junction split model entrance effect mechanism model improved model

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国家建构、政治文化与政治危机——中东国家政治现代化的三维考量

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西亚非洲 2024年第3期 31-55,172页

作者：韩志斌马云飞西北大学中东研究所

中东国家的现代化在世界现代化历程中独具特色,从国家建构、政治文化和政治危机3个维度可以探究中东国家政治现代化的历史经纬、文化机理和面临的挑战。中东国家在政治现代化的启动、演进和探索过程中,以伊斯兰政治文化、强人政治文化... 详细信息

中东国家的现代化在世界现代化历程中独具特色,从国家建构、政治文化和政治危机3个维度可以探究中东国家政治现代化的历史经纬、文化机理和面临的挑战。中东国家在政治现代化的启动、演进和探索过程中,以伊斯兰政治文化、强人政治文化、部落主义政治文化等为主要内容的传统政治文化一直是影响这些国家政治现代化的风向标,而以阿拉伯民族主义、阿拉伯社会主义、伊斯兰中间主义等为主要内容的现代政治文化则是反映中东国家政治现代化质量和水平的“晴雨表”。中东国家政治现代化面临着国家认同、政治整合、政策贯彻、民众参与、政治分配、政治合法性等六重危机与挑战。因此,中东国家只有跳出西方政治模式的“窠白”,以自身国情民意为基础,才能走出一条独具特色的政治现代化发展道路。

关键词：政治现代化中东国家建构政治文化政治危机

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