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Manipulating Crystal Growth and Secondary Phase PbI_(2)to Enable Efficient and Stable Perovskite Solar Cells with Natural Additives

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Nano-Micro Letters 2024年第9期16卷 432-448页

作者： yirong Wang Yaohui Cheng Chunchun Yin Jinming Zhang Jingxuan You Jizheng Wang Jinfeng Wang Jun Zhang Institute of Chemistry Chinese Academy of Sciences(CAS)Beijing 100190People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China Nanjing University Nanjing 210023People’s Republic of China Wuhan Textile University Wuhan 430200People’s Republic of China

In perovskite solar cells(PSCs),the inherent defects of perovskite film and the random distribution of excess lead iodide(PbI_(2))prevent the improvement of efficiency and ***,natural cellulose is used as the raw material to design a series of cellulose derivatives for perovskite crystallization *** cationic cellulose derivative C-Im-CN with cyano-imidazolium(Im-CN)cation and chloride anion prominently promotes the crystallization process,grain growth,and directional orientation of ***,excess PbI_(2)is transferred to the surface of perovskite grains or formed plate-like crystallites in local *** effects result in suppressing defect formation,decreasing grain boundaries,enhancing carrier extraction,inhibiting non-radiative recombination,and dramatically prolonging carrier ***,the PSCs exhibit a high power conversion efficiency of 24.71%.moreover,C-Im-CN has multiple interaction sites and polymer skeleton,so the unencapsulated PSCs maintain above 91.3%of their initial efficiencies after 3000 h of continuous operation in a conventional air atmosphere and have good stability under high humidity *** utilization of biopolymers with excellent structure-designability to manage the perovskite opens a state-of-the-art avenue for manufacturing and improving PSCs.

关键词： Perovskite Solar cells Defect passivation Biomass additives Crystal orientation

A novel sparse SAR unambiguous imaging method based on mixed-norm optimization

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Science China(Information Sciences) 2023年第11期66卷 307-308页

作者： Hui BI Yufan SONG Yanjie YIN Jingjing ZHANG Wen HONG yirong WU College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics Key Laboratory of Radar Imaging and Microwave Photonics Ministry of Education Nanjing University of Aeronautics and Astronautics Aerospace Information Research Institute Chinese Academy of Sciences

Sparse synthetic aperture radar(SAR) systems always obtain a wide swath by reducing the pulse repetition frequency(PRF). However, the reduction of PRF will cause azimuth ambiguity, and even lead to failed reconstruction of the observation scenes in SAR imaging because traditional sparse SAR imaging models do not consider the azimuth ambiguity terms and cannot effectively suppress ambiguity.

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The impact of landslides on chemical and microbial properties of soil in a temperate secondary forest ecosystem

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Journal of Forestry Research 2022年第6期33卷 1913-1923页

作者： Yakun Zhang Chen Miao Jiaojun Zhu Tian Gao yirong Sun Jinxin Zhang Shuang Xu Kai Yang Qingyuan Forest CERN Institute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China

In forest ecosystems,landslides are one of the most common natural disturbances,altering the physical,chemical and microbial characteristics of soil and thus further altering ecosystem properties and *** secondary forests comprise more than 50%of global forests,the influence of landslides on the soil properties in these forests is ***,this study investigates the influence of landslides on the chemical and microbial nature of the *** of these modifications is critical,as it provides baseline evidence for subsequent forest *** selected four independent landslides and adjacent secondary forest stands as references in a temperate secondary forest in northeastern *** were obtained from each stand at 0–10 cm and 10–20 cm depths to determine chemical and microbial *** total carbon(TC),total nitrogen(TN),nitrate(NO_(3)^(-)-N),available phosphorus(P),microbial biomass carbon(MBC),microbial biomass nitrogen(MBN),microbial biomass phosphorus(MBP)and phenol oxidase,exoglucanase,β-glucosidase,N-acetyl-β-glucosaminidase,L-asparaginase and acid phosphatase activities were 29.3–70.1%lower at the 0–10 cm soil depth in the landslide sites than at the secondary forest sites,whereas total phosphorus(TP)and ammonium(NH_(4)^(+)-N)were unaffected by the landslides.N-related enzymes,N-acetyl-β-glucosaminidase and L-asparaginase were reduced by more than 65%in the landslide sites,consistent with the decrease in nitrate concentration at the same 0–10 cm *** a depth of 10–20 cm,the variations in the soil properties were consistent with those at the 0–10 cm *** results demonstrated that soil chemical and microbial properties were significantly disrupted after the landslides,even though the landslides had occurred 6 years earlier.A long time is thus needed to restore the original C and nutrient *** temperate secondary forests,soil TC and TN contents were found to be more suitable for estimating the sta

关键词： Secondary forest Landslide Soil nutrients Microbial biomass Enzyme activity

A Study of 10 Rotating Radio Transients Using Parkes Radio Telescope

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Research in Astronomy and Astrophysics 2024年第4期24卷 114-123页

作者： Xinhui Ren Jingbo Wang Wenming Yan Jintao Xie Shuangqiang Wang yirong Wen Yong Xia Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Institute of Optoelectronic Technology Lishui UniversityLishui 323000China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Research Center for Intelligent Computing Platforms Zhejiang LaboratoryHangzhou 311100China

Rotating Radio Transients(RRATs)are a relatively new subclass of pulsars that emit detectable radio bursts *** analyzed 10 RRATs observed using the Parkes telescope,with eight of these observed via the ultra-wide-bandwidth low-frequency(UWL)*** measured the burst rate and produced integrated profiles spanning multiple frequency bands for three *** also conducted a spectral analysis on both integrated pulses and individual pulses of three *** of their integrated pulses follow a simple power law,consistent with the known range of pulsar spectral *** average spectral indices of single pulses are-0.9,-1.2,and-1.0 respectively,which are within the known range of pulsar spectral ***,we find that the spreads of single-pulse spectral indices for these RRATs(ranging from-3.5 to+0.5)are narrower compared to what has been observed in other ***,the average spectral index and scatter of single pulses are both relatively *** the remaining five RRATs observed at the UWL receiver,we also provide the upper limits on fluence and flux *** addition,we obtain the timing solution of PSR *** analysis shows that PSRs J1919+1745,J1709-43,and J1649-4653 are potentially nulling pulsars or weak pulsars with sparse strong pulses.

关键词： (stars:)pulsars:general stars:neutron stars:individual(PSRs J1919+1745.1909+0641,0628+0909)

A New Time-Aware Collaborative Filtering Intelligent Recommendation System

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Computers, Materials & Continua 2019年第8期61卷 849-859页

作者： Weijin Jiang Jiahui Chen yirong Jiang Yuhui Xu Yang Wang Lina Tan Guo Liang Key Laboratory of Hunan Province for New Retail Virtual Reality Technology Hunan University of Technology and BusinessChangsha410205China Institute of Big Data and Internet Innovation Hunan University of Technology and BusinessChangsha410205China School of Computer Science and Technology Wuhan University of TechnologyWuhan430073China Tonghua Normal University Tonghua134002China School of Bioinformatics University of MinnesotaTwin CitiesUSA

Aiming at the problem that the traditional collaborative filtering recommendation algorithm does not fully consider the influence of correlation between projects on recommendation accuracy,this paper introduces project attribute fuzzy matrix,measures the project relevance through fuzzy clustering method,and classifies all project ***,the weight of the project relevance is introduced in the user similarity calculation,so that the nearest neighbor search is more *** the prediction scoring section,considering the change of user interest with time,it is proposed to use the time weighting function to improve the influence of the time effect of the evaluation,so that the newer evaluation information in the system has a relatively large *** experimental results show that the improved algorithm improves the recommendation accuracy and improves the recommendation quality.

关键词： Fuzzy clustering time weight attenuation function Collaborative filtering method recommendation algorithm

The Nullities of Signed Cycle-Spliced Graphs

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Journal of Mathematical Research with Applications 2023年第6期43卷 631-647页

作者： Sarula CHANG Jianxi LI yirong ZHENG College of Science Inner Mongolia Agricultural University School of Mathematics and Statistics Minnan Normal University School of Mathematics and Statistics Xiamen University of Technology

Let η(Γ) and c(Γ) be the nullity and the cyclomatic number of a signed graph Γ. A signed cycle-spliced graph is a connected signed graph in which every block is a cycle. In this paper, we prove that for every signed cycle-spliced graph Γ, η(Γ) ≤ c(Γ) + 1 and the extremal graphs Γ with nullity c(Γ) + 1 are characterized, which extend the related results of Wong,Zhou and Tian(2022) on simple cycle-spliced graphs. moreover, we prove that for every signed cycle-spliced graph Γ, η(Γ) =/c(Γ). Some properties on signed cycle-spliced graphs Γ withη(Γ) = c(Γ)-1 are explored, as well as a structural characterization on signed cycle-spliced bipartite graphs Γ satisfying η(Γ) = c(Γ)-1.

关键词： signed graph nullity cyclomatic number

Joint SAR imaging and wireless communication using the FBMC chirp waveform

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Science China(Information Sciences) 2020年第4期63卷 236-238页

作者： Kehong ZHU Jie WANG Xingdong LIANG Longyong CHEN Yanlei LI Xiangxi BU yirong WU Institute of Electronics Chinese Academy of Sciences National Key Laboratory of Science and Technology on Microwave Imaging College of Electronic and Information Engineering Nanjing University of Information Science & Technology

Dear editor,Joint system designs help improve resource efficiency and reduce the volume and energy consumption of electronic systems; therefore, such joint systems have become a research hot spot in recent years [1, 2]. To improve the flexibility of the working modes and to enhance adaptability to complex applications, joint synthetic aper-

关键词： domain Doppler Joint SAR imaging and wireless communication using the FBMC chirp waveform SAR

more humility,less counterproductive work behaviors?The role of interpersonal justice and trust

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Frontiers of Business Research in China 2019年第4期13卷 431-448页

作者： Yue Wang Wenhao Luo Jing Zhang yirong Guo Business school Renmin University of ChinaBeijing 100872China School of Economics and Management North China University of TechnologyNo.5 Jinyuanzhuang RoadShijingshan DistrictBeijing 100144China School of Business Administration Hebei University of Economics and BusinessShijiazhuangChina School of Economics and Management Tsinghua UniversityBeijingChina

Leader humility has emerged as an important topic in understanding the role of leadership in organizations in recent *** it was found to enhance subordinates’work performance and positive work behaviors,we are unaware of the psychological mechanism and boundary conditions underlying leader humility and employees’negative behaviors toward *** on social exchange theory and using a multistage sample including 273 employees and 55 supervisors in China,we demonstrated a negative indirect effect between leader humility and subordinates’counterproductive work behaviors toward supervisors(CWB-S)via interpersonal justice and trust in ***,we find that leader political skill moderates the effect of leader humility on interpersonal justice and trust in *** indirect effect of leader humility on subordinates’CWB-S through interpersonal justice is stronger when leader political skill is high,suggesting a moderated mediation ***,we discuss the theoretical contributions and practical implications of this study,and highlight future directions for research on leader humility.

关键词： Social exchange theory Leader humility Counterproductive work behaviors toward supervisors(CWB-S) Interpersonal justice Trust in supervisor Leader political skill

Convergent evolution of AP2/ERF Ⅲ and IX subfamilies through recurrent polyploidization and tandem duplication during eudicot adaptation to paleoenvironmental changes

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Plant Communications 2022年第6期3卷 74-88页

作者： Liangyu Guo Shuo Wang Yuqi Nie yirong Shen Xiaoxue Ye Wenwu Wu State Key Laboratory of Subtropical Silviculture School of Forestry and BiotechnologyZhejiang A&F UniversityLin’anHangzhou 311300China Institute of Tropical Biosciences and Biotechnology Chinese Academy of Tropical Agricultural SciencesHaikou 571101China

Whole-genome duplication(WGD or polyploidization)has been suggested as a genetic contributor to angiosperm adaptation to environmental ***,many eudicot lineages did not undergo recent WGD(R-WGD)around and/or after the Cretaceous-Paleogene(K-Pg)boundary,times of severe environmental changes;how those plants survived has been largely ***,we collected 22 plants from major branches of the eudicot phylogeny and classified them into two groups according to the occurrence or absence of R-WGD:12 R-WGD-containing plants(R-WGD-Y)and 10 R-WGD-lacking plants(R-WGD-N).Subsequently,we identified 496 gene-rich families in R-WGD-Y and revealed that members of the AP2/ERF transcription factor family were convergently over-retained after R-WGDs and showed exceptional cold *** evolutionary trajectories of the AP2/ERF family were then compared between R-WGD-Y and R-WGD-N to reveal convergent expansions of the AP2/ERF Ⅲ and IX subfamilies through recurrent independent WGDs and tandem duplications(TDs)after the radiation of the *** expansions showed coincident enrichments in-times around and/or after the K-Pg boundary,when global cooling was a major environmental ***,convergent expansions and co-retentions of AP2/ERF Ⅲ C-repeat binding factor(CBF)duplicates and their regulons in different eudicot lineages contributed to the rewiring of cold-specific regulatory ***,promoter analysis of cold-responsive AP2/ERF genes revealed an underlying cis-regulatory code(G-box:CACGTG).We propose a seesaw model of WGDs and TDs in the convergent expansion of AP2/ERF Ⅲ and IX genes that has contributed to eudicot adaptation during paleoenvironmental changes,and we suggest that TD may be a reciprocal/alternative mechanism for genetic innovation in plants that lack WGD.

关键词： polyploidization tandem duplication AP2/ERF family adaptive evolution global cooling abiotic stress