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| 1 | Strong ozone production at a rural site in the North China Plain: Mixed effects of urban plumes and biogenic emissions显示文摘Regional ozone(O_3) pollution has drawn increasing attention in China over the recent decade, but the contributions from urban pollution and biogenic emissions have not been clearly elucidated. To better understand the formation of the regional O_3 problem in the North China Plain(NCP), intensive field measurements of O_3 and related parameters were conducted at a rural site downwind of Ji'nan, the capital city of Shandong province, in the summer of 2013. Markedly severe O_3 pollution was recorded, with the O_3 mixing ratios exceeding the Chinese national ambient air quality standard on 28 days(a frequency of 78%) and with a maximum hourly value of 198 ppbv. Extensive regional transport of wellprocessed urban plumes to the site was identified. An observation-constrained chemical box model was deployed to evaluate in situ photochemical O_3 production on two episodes.The results show that the in situ formation accounted for approximately 46% of the observed O_3 accumulation, while the remainder(~54%) was contributed by regional transport of the O_3-laden urban plumes. The in situ ozone production was in a mixed controlled regime that reducing either NOx or VOCs would lead to a reduction of ozone formation. Biogenic VOCs played an important role in the local ozone formation. This study demonstrates the significant mixed effects of both anthropogenic pollution from urban zones and biogenic emission in rural areas on the regional O_3 pollution in the NCP region,and may have general applicability in facilitating the understanding of the formation of secondary pollution over China. | Ruihan Zong Xue Yang Liang Wen Caihong Xu Yanhong Zhu Tianshu Chen Lan Yao Liwei Wang Junmei Zhang Lingxiao Yang Xinfeng Wang Min Shao Tong Zhu Likun Xue Wenxing Wang | 2018 | Journal of Environmental Sciences2018，30，9： | 8 |
| 2 | Cloud-based typhoon-derived paddy rice flooding and lodging detection using multi-temporal Sentinel-1&2显示文摘Rice production in China’s coastal areas is frequently affected by typhoons,since the associated severe storms,with heavy rain and the strong winds,lead directly to the rice plants becoming flooded or lodged.Long-term flooding and lodging can cause a substantial reduction in rice yield or even destroy the harvest completely.It is therefore urgent to obtain accurate information about paddy rice flooding and lodging as soon as possible after the passing of the storm.This paper proposes a workflow in Google Earth Engine(GEE)for mapping the flooding and lodging area of paddy rice in Wenzhou City,Zhejiang,following super typhoon Maria(Typhoon No.8 in 2018).First,paddy rice in the study area was detected by multi-temporal Sentinel-1 backscatter data combined with Sentinel-2-derived Normalized Difference Vegetation Index(NDVI)using the Random Forests(RFs)algorithm.High classification accuracies were achieved,whereby rice detection accuracy was calculated at 95%(VH+NDVI-based)and 87%(VV+NDVI-bastd).Secondly,Change Detection(CD)based Rice Normalized Difference Flooded Index(RNDFI)and Rice Normalized Difference Lodged Index(RNDLI)were proposed to detect flooding and lodged paddy rice.Both RNDFI and RNDLI were tested based on four different remote sensing data sets,including the Sentinel-1-derived VV and VH backscattering coefficient,Sentinel-2-derived NDVI and Enhanced Vegetation Index(EVI).Overall agreement regarding detected area between the each two different data sets was obtained,with values of 79%to 93%in flood detection and 64%to 88%in lodging detection.The resulting flooded and lodged paddy rice maps have potential to reinforce disaster emergency assessment systems and provide an important resource for disaster reduction and emergency departments. | Wanben WU Wei WANG Michael E.Meadows Xinfeng YAO Wei PENG | 2019 | Frontiers of Earth Science2019，13，4： | 2 |
| 3 | Spectral data treatments for impervious endmember derivation and fraction mapping from Landsat ETM+ imagery: a comparative analysis显示文摘各种各样光谱数据预处理途径被用来为城市的风景分解改进 endmember 抽取,然而,很少被了解他们四通常使用了的为印射测试的这研究的不可渗透的表面的比较足够光谱包括原来的系列,为 endmember 推导的数据处理策略想象经由主要部件分析的熔化,光谱用每策略导出的正规化,和最小的噪音部分( MNF )转变陆地盖子 endmembers 被用来造一线性光谱混合分析( LSMA )模型以便 unmix 对待图象象素进部分地图,并且一张城市的透不过地图被联合代表透不过 endmembers A 的部分地图产生跨地图的比较分析然后被执行评价处理基于象决心的系数的如此的普通评估索引打的四个数据( R 2)和根均方差( RMSE ). Landsat 7 ETM+盖住上海的大城市的区域的 multispectral 图象,当主要数据集,和模型结果用高分辨率的 colorinfrared 天线相片被评估,中国被使用粗略地测试结果显示了的一样的时间时期那,与最高的 R 2( 0.812 )和在所有四个预处理处理之中的最低 RMSE ( 0.097 ),在 转变MNF 的系列形式的 endmembers 为描绘这研究的结果可以提供的城市的不可渗透的表面生产了最好的模型输出为未来的有用指导用中等决定的遥感数据印射的不可渗透的表面。 | Wei WANG Xinfeng YAO Minhe JI Jiao ZHANG | 2015 | Frontiers of Earth Science2015，9，2： | 1 |
| 4 | Estimating leaf nitrogen concentration with three-band vegetation indices in rice and wheat显示文摘 | Wang Wei Yao Xia Yao Xinfeng | 2012 | Field Crops Research2012，129，1： | 1 |
| 5 | Estimating leaf nitrogen concentration with three-band vegetation indices in rice and wheat显示文摘 | Wei Wang Xia Yao XinFeng Yao YongChao Tian XiaoJun Liu Jun Ni WeiXing Cao Yan Zhu | 2012 | Field Crops Research2012，，： | 1 |
| 6 | The fabrication of large-area upgraded metallurgical grade multi-crystalline silicon solar cells in a production line 显示文摘 | Tang Xinfeng Wu Ying Yao Yan | 2013 | Energy and Enviromennt Materials2013，743，： | 1 |
| 7 | Brassinosteroids protect photosynthesis and antioxidant system of eggplant seedlings from high-temperature stress显示文摘 | Xuexia Wu Xinfeng Yao Jianlin Chen Zongwen Zhu Hui Zhang Dingshi Zha | 2014 | Acta Physiologiae Plantarum2014，，2： | 1 |
| 8 | Lateral quantum confinement regulates charge carrier transfer and biexciton interaction in CdSe/CdSeS core/crown nanoplatelets显示文摘Charge carrier dynamics essentially determines the performance of various optoelectronic applications of colloidal semiconductor nanocrystals.Among them,two-dimensional nanoplatelets provide new adjustment freedom for their unique core/crown heterostructures.Herein,we demonstrate that by fine-tuning the core size and the lateral quantum confinement,the charge carrier transfer rate from the crown to the core can be varied by one order of magnitude in CdSe/CdSeS core/alloy-crown nanoplatelets.In addition,the transfer can be affected by a carrier blocking mechanism,i.e.,the filled carriers hinder further possible transfer.Furthermore,we found that the biexciton interaction is oppositely affected by quantum confinement and electron delocalization,resulting in a non-monotonic variation of the biexciton binding energy with the emission wavelength.This work provides new observations and insights into the charge carrier transfer dynamics and exciton interactions in colloidal nanoplatelets and will promote their further applications in lasing,display,sensing,etc. | Yige Yao Xiaotian Bao Yunke Zhu Xinyu Sui An Hu Peng Bai Shufeng Wang Hong Yang Xinfeng Liu Yunan Gao | 2023 | Nano Research2023，16，7： | 0 |
| 9 | Single-cell analysis reveals the potential mechanisms of pyrotinib resistance in non-small cell lung cancer显示文摘Dear Editor,Lung cancer still remains the leading cause of cancer death worldwide,80-90%of which are non-small cell lung cancer(NSCLC).In 2-3%of NSCLC patients,mutations in human epidermal growth factor receptor 2(HER2)have been identified as oncogenic drivers.However,HER2 has been poorly reported as a therapeutic target for advanced NSCLC despite of the outstanding improvements in breast cancer receiving HER2-targeting regimens. | Xinfeng Wang Yuan Li Runsen Jin Sufei Zheng Yuejun Luo Peng Wu Zhanyu Wang Yuxin Yao Nan Sun Jie He | 2023 | Signal Transduction and Targeted Therapy2023，8，2： | 0 |
| 10 | Few-layered organic single-crystalline heterojunctions for high-performance phototransistors显示文摘Photogating and electrical gating are key physical mechanisms in organic phototransistors(OPTs).However,most OPTs are based on thick and polycrystalline films,which leads to substantially low efficiency of both photogating and electrical gating and thus reduced photoresponse.Herein,high-performance OPTs based on few-layered organic single-crystalline heterojunctions are proposed and the obstacle of thick and polycrystalline films for photodetection is overcome.Because of the molecular scale thickness of the type I organic single-crystalline heterojunctions in OPTs,both photogating and electrical gating are highly efficient.By synergy of efficient photogating and electrical gating,key figures of merit of OPTs reach the highest among those based on planar heterojunctions so far as we know.The production of few-layered organic single-crystalline heterojunctions will provide a new type of advanced materials for various applications. | Xinzi Tian Jiarong Yao Lijuan Zhang Bin Han Jianwei Shi Jianwei Su Jie Liu Chunlei Li Xinfeng Liu Tianyou Zhai Lang Jiang Fangxu Yang Xiaotao Zhang Ye Zou Rongjin Li Wenping Hu | 2022 | Nano Research2022，15，3： | 0 |
| 11 | Comprehensive understanding on sources of high levels of fine particulate nitro-aromatic compounds at a coastal rural area in northern China显示文摘Nitro-aromatic compounds(NACs)are among the major components of brown carbon(BrC)in the atmosphere,causing negative impacts on regional climate,air quality,and ecological health.Due to the extensive origins,it is still a challenge to figure out the contributions and originating regions for different sources of atmospheric NACs.Here,field observations on fine particulate NACs were conducted at a coastal rural area in Qingdao,China in the winter of 2018 and 2019.The mean total concentrations of fine particulate nitro-aromatic compounds were 125.0±89.5 and 27.7±21.1 ng/m^(3)in the winter of 2018 and 2019,respectively.Among the measured eleven NACs,nitrophenols and nitrocatechols were the most abundant species.Variation characteristics and correlation analysis showed that humidity and anthropogenic primary emissions had significant influences on the NAC abundances.In this study,two tracing methods of the improved spatial concentration weighted trajectory(SCWT)model and the receptor model of positive matrix factorization(PMF)were combined to comprehensively understand the origins of NACs in fine particles at coastal Qingdao.Four major sources were identified,including coal combustion,biomass burning,vehicle exhaust,and secondary formation.Surprisingly,coal combustion was responsible for about half of the observed nitro-aromatic compounds,followed by biomass burning(~30%).The results by SCWT demonstrated that the coal combustion dominated NACs mainly originated from the Shandong peninsula and the areas to the north and southwest,while those dominated by biomass burning primarily came from local Qingdao and the areas to the west. | Yueru Jiang Xinfeng Wang Min Li Yiheng Liang Zhiyi Liu Jing Chen Tianyi Guan Jiangshan Mu Yujiao Zhu He Meng Yang Zhou Lan Yao Likun Xue Wenxing Wang | 2024 | Journal of Environmental Sciences2024，，1： | 0 |
| 12 | Helical supramolecular nanorods via sequential meticulous tailoring of noncovalent interaction and light irradiation显示文摘Polymers are widely recognized to entail random conformations in good solvent governed by the need for achieving the highest entropy to reach thermodynamic equilibrium.In this context,it remains grand challenging to directly arrange them into ordered conformation as building blocks for further self-assembling into hierarchal structures.Herein,we report a simple yet viable strategy to progressively assemble rationally designed azobenzene-containing alternating copolymer(i.e.,poly(binaphthylspacer-azobenzene-alt-hexaethylene glycol),denoting P(BNPSAzo-alt-EG_(6))_(24))into helical supramolecular nanorods.Specifically,P(BNPSAzo-alt-EG_(6))_(24) chains in good solvent are firstly self-assembled into helical single molecular micelles in good solvent via intramolecular π-π interaction between binaphthyl groups as well as between azobenzene moieties.Subsequently,by simply introducing water into the solution that is allowed to dwell for a certain period of time,single molecular micelles are selfassembled into well-defined vesicles.Finally,these isotropic vesicles could be further transformed into anisotropic helical supramolecular nanorods with enhanced aggregate-induced emission(AIE)capability driven by repeated,light-triggered cistrans isomerization of azobenzene moieties with the retention of π-π interacted binaphthyl groups.This study highlights a facile route to yielding morphology-rich,functional assemblies from a single polymer via judiciously exploiting non-covalent interaction and light of different wavelength as highly effective trigger in a non-invasive manner for potential applications in controlled release and fluorescent labelling. | Zhenghui Liu Yuan Yao Xinfeng Tao Jie Wei Shaoliang Lin | 2022 | Science China Chemistry2022，65，9： | 0 |
| 13 | Strange Attractors in the Resonance Interaction of Two-State Atoms with Single-Mode Laser Field显示文摘The resonance Interaction or two-state atoms with single mode rleld is described theoretically byusing the semi-classical theory and Jaynes-Cummings model. The nonlinear characteristics of this system arecalculated by using FFT and Runge-Kutta methods. The chaotic strange attractors in this system are obtainedfrom the numerical results. | Xue Xinfeng Zhang Yuesheng Yao Duanzheng | 1998 | Wuhan University Journal of Natural Sciences1998，3，1： | 0 |
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