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| 1 | Carbon nanotubes-supported palladium nanoparticles for the Suzuki reaction in supercritical carbon dioxide: A facile method for the synthesis of tetrasubstituted olefins显示文摘A facile and efficient method for the synthesis of tetrasubstituted olefins in supercritical carbon dioxide was developed by using carbon nanotubes-supported palladium nanoparticles (Pd/CNTs) as the catalyst. Compared with common Pd/C, Pd/CNTs could more effectively catalyze the reaction of dibromo-substituted olefins with boronic acids, affording the corresponding tetrasubstituted olefins with moderate to good yields. This environmentally benign route with an easy-to-handle catalyst provides an appealing alternative to the currently available methods. | ZHOU Lei ZHANG WeiDe JIANG HuanFeng | 2008 | Science China Chemistry2008，51，3： | 3 |
| 2 | Histidine-catalyzed synthesis of cyclic carbonates in supercritical carbon dioxide显示文摘The coupling reaction of carbon dioxide with epoxides was investigated using naturally occurring α-amino acids as the catalyst in supercritical carbon dioxide and it was found that L-histidine is the most active catalyst.In the presence of 0.8 mol% of L-histidine at 130°C under 8 MPa of CO_(2),the reaction of carbon dioxide with epoxides proceeded smoothly,affording corresponding cyclic carbonates in good to excellent yields. | QI ChaoRong JIANG HuanFeng | 2010 | Science China Chemistry2010，53，7： | 3 |
| 3 | Forest height mapping using inventory and multi-source satellite data over Hunan Province in southern China显示文摘Background:Accurate mapping of forest canopy heights at a fine spatial resolution over large geographical areas is challenging.It is essential for the estimation of forest aboveground biomass and the evaluation of forest ecosystems.Yet current regional to national scale forest height maps were mainly produced at coarse-scale.Such maps lack spatial details for decision-making at local scales.Recent advances in remote sensing provide great opportunities to fill this gap.Method:In this study,we evaluated the utility of multi-source satellite data for mapping forest heights over Hunan Province in China.A total of 523 plot data collected from 2017 to 2018 were utilized for calibration and validation of forest height models.Specifically,the relationships between three types of in-situ measured tree heights(maximum-,averaged-,and basal area-weighted-tree heights)and plot-level remote sensing metrics(multispectral,radar,and topo variables from Landsat,Sentinel-1/PALSAR-2,and SRTM)were analyzed.Three types of models(multilinear regression,random forest,and support vector regression)were evaluated.Feature variables were selected by two types of variable selection approaches(stepwise regression and random forest).Model parameters and model performances for different models were tuned and evaluated via a 10-fold cross-validation approach.Then,tuned models were applied to generate wall-to-wall forest height maps for Hunan Province.Results:The best estimation of plot-level tree heights(R2 ranged from 0.47 to 0.52,RMSE ranged from 3.8 to 5.3 m,and rRMSE ranged from 28%to 31%)was achieved using the random forest model.A comparison with existing forest height maps showed similar estimates of mean height,however,the ranges varied under different definitions of forest and types of tree height.Conclusions:Primary results indicate that there are small biases in estimated heights at the province scale.This study provides a framework toward establishing regional to national scale maps of vertical forest structure. | Wenli Huang Wankun Min Jiaqi Ding Yingchun Liu Yang Hu Wenjian Ni Huanfeng Shen | 2022 | Forest Ecosystems2022，9，1： | 2 |
| 4 | Delay model of signalized roundabouts显示文摘In order to evaluate the service level of roundaboutsintuitively, a new delay model of signalized roundabouts isestablished. According to traffic flow characteristics in thesignalized roundabout, vehicle delays on roundabouts aredivided into two parts: entrance delay and circulating lanedelay. Entrance delay is calculated by the delay model inHCM2010. Circulating lane delay is studied by analyzingconflict behavior in signalized roundabouts, and the delaymodels of traffic flows turning in different directions areestablished based on the motorcade analysis method. Finally,the simulation software Vissim, calibrated with field data, isused to verify the model. The simulation results show that theaverage relative error of the model is 10. 1%, meeting theaccuracy requirements. Therefore, the delay model properlyreflects the operation efficiency of a roundabout, and can thusorovide a scientific basis for the design of control schemes. | Liu Huanfeng Song Xianmin Zhang Libin Tao Pengfei Yang Qiujie | 2017 | Journal of Southeast University(English Edition)2017，33，3： | 2 |
| 5 | Copper-Catalyzed Benzylic C—H Functionalization, Oxidation and Cyclization of Methylarenes: Direct Access to z-Arylbenzothiazoles显示文摘Background and Originality Content As an inexpensive,fundamental and important feedstock for the petrochemical industry,methylarenes have long been regarded as one of the most widely used raw materials for a great variety of organic transformations.Therefore,the selective benzylic C(sp3)—H functionalization is particularly important,which provides a strategic means to utilize this resource. | Wentao Yu Wanqing Wu Huanfeng Jiang | 2019 | Chinese Journal of Chemistry2019，37，11： | 2 |
| 6 | A fully automatic and high-accuracy surface water mapping framework on Google Earth Engine using Landsat time-series显示文摘Efficient and continuous monitoring of surface water is essential for water resource management.Much effort has been devoted to the task of water mapping based on remote sensing images.However,few studies have fully considered the diverse spectral properties of water for the collection of reference samples in an automatic manner.Moreover,water area statistics are sensitive to the satellite image observation quality.This study aims to develop a fully automatic surface water mapping framework based on Google Earth Engine(GEE)with a supervised random forest classifier.A robust scheme was built to automatically construct training samples by merging the information from multi-source water occurrence products.The samples for permanent and seasonal water were mapped and collected separately,so that the supplement of seasonal samples can increase the spectral diversity of the sample space.To reduce the uncertainty of the derived water occurrences,temporal correction was applied to repair the classification maps with invalid observations.Extensive experiments showed that the proposed method can generate reliable samples and produce good-quality water mapping results.Comparative tests indicated that the proposed method produced water maps with a higher quality than the index-based detection methods,as well as the GSWD and GLAD datasets. | Linwei Yue Baoguang Li Shuang Zhu Qiangqiang Yuan Huanfeng Shen | 2023 | International Journal of Digital Earth2023，16，1： | 2 |
| 7 | Study on proposed value of catanchor co-efficient for large prestressed pier显示文摘 | Huang Zhenke Fu Shaojun Qiu Huanfeng ChenShenghong | 2011 | Applied Me-chanics and Materials2011，9093，： | 1 |
| 8 | Fusion of polarimetric and texture information for urban building ex- traction from fully polarimetric SAR imagery显示文摘 | Zhai Wei Shen Huanfeng Huang Chunlin | 2016 | Re- mote Sensing Letters2016，7，1： | 1 |
| 9 | Water-soluble PANI:PSS designed for spontaneous non-disruptive membrane penetration and direct intracellular photothermal damage on bacteria显示文摘The major challenge in the field of antibacterial agents is to overcome the low-permeability of bacteria cell membranes that protects the cells against diverse drugs.In this work,water-soluble polyaniline(PANI)-poly(p-styrenesulfonic acid)(PSS)(PANI:PSS)is found to spontaneously penetrate bacteria cellular membranes in a non-disruptive way,leaving no evidence of membrane poration/disturbance or cell death,thus avoiding side effects caused by cationic ammonia groups in traditional ammonia-containing antibacterial agents.For aqueous synthesis,which is important for biocompatibility,the polymer is synthesized via an enzyme-mimetic route relying on the catalysis of a nanozyme.Owing to its fluorescent properties,the localization of as-prepared PANI:PSS is determined by the confocal microscope,and the results confirm its rapid entry into bacteria.Under 808 nm near-infrared(NIR)irradiation,the internalized PANI:PSS generates local hyperthermia and destroys bacteria highly efficiently from inside the cells due to its excellent photothermal effects.Staphylococcus aureus(S.aureus),Methicillin-resistant Staphylococcus aureus(MRSA)and Escherichia coli(E.coli)could be effectively eliminated as well as the corresponding bacterial biofilms.Results of in vivo antibacterial experiments demonstrate excellent antibacterial activities of the water-soluble PANI:PSS without side effects.Therefore,the prepared water-soluble polymer in this study has great potential in the treatment of various bacterial infections. | Huanfeng Tang Yifan Liu Bing Li Bo Shang Jiacheng Yang Congrou Zhang Lijun Yang Kezheng Chen Wei Wang Jianfeng Liu | 2021 | Bioactive Materials2021，6，12： | 1 |
| 10 | Zoom-based super-resolution recon-struction approach using prior total variation[]]显示文摘 | Michael K.Ng Huanfeng Shen Subhasis Chaudhuri Andy C.Yau | | 0，，12： | 1 |
| 11 | Multiframe Super-resolution Employing a Spatially Weighted Total Variation Model显示文摘 | Yuan Qiangqiang Zhang Liangpei Shen Huanfeng | 2012 | IEEE Transactions on Circuits and Systems for Video Technology2012，22，3： | 1 |
| 12 | Silver-Catalyzed Three-Component Coupling of Carbon Dioxide, Amines and α-Diazoesters显示文摘 | Chaorong Qi Donghao Yan Wenfang Xiong Huanfeng Jiang | 2018 | Chinese Journal of Chemistry2018，36，5： | 1 |
| 13 | A daptive multiple-frame image super-resolution based on U-Curve显示文摘 | Qiangqiang Y Liangpei Z Huanfeng S | 2010 | Image Processing IEEE Transactions on2010，19，12： | 1 |
| 14 | Land-surface temperature retrieval at high spatial and temporal resolutions based on multi-sensor fusion显示文摘Land-surface temperature(LST)is of great significance for the estimation of radiation and energy budgets associated with land-surface processes.However,the available satellite LST products have either low spatial resolution or low temporal resolution,which constrains their potential applications.This paper proposes a spatiotemporal fusion method for retrieving LST at high spatial and temporal resolutions.One important characteristic of the proposed method is the consideration of the sensor observation differences between different land-cover types.The other main contribution is that the spatial correlations between different pixels are effectively considered by the use of a variation-based model.The method was tested and assessed quantitatively using the different sensors of Landsat TM/ETM,moderate resolution imaging spectroradiometer and the geostationary operational environmental satellite imager.The validation results indicate that the proposed multisensor fusion method is accurate to about 2.5 K. | Penghai Wu Huanfeng Shen Tinghua Ai Yaolin Liu | 2013 | International Journal of Digital Earth2013，6，S01： | 1 |
| 15 | Facile Route to Constructing Ternary Nanoalloy Bifunctional Oxyegn Cathode for Metal-Air Batteries显示文摘Highly stable and efficient bifunctional air cathode catalyst is crucial to rechargeable metal-air batteries.Herein,a ternary nanoalloy layer composed of noble and base metal coated on a three-dimensional porous Ni sponge as the bifunctional cathode is synthesized through in-situ anchoring strategy,which can effectively keep the multimetal nanoparticles from agglomeration and improve the density of active sites and catalytic activity.The prepared catalyst displays an excellent catalytic performance with lower overpotential and long-term stability.The Zn-air batteries with the as-prepared cathodes possess a large power density of 170 mW/cm2,long cycling stability up to 230 cycles,and a high specific capacity of 771 mA h/g.Furthermore,the corresponding Li-air batteries deliver a discharge capacity of 22429 mA h/g.These superior properties of the metal-air batteries can be attributed to the combined influence of design and composition of electrode,which is of great significance to improve the electrochemical catalytic activity,providing great potential of wide application in expanded rechargeable energy systems. | WANG Huanfeng LI Junfeng LI Fei LI Jingjing XU Jijing | 2020 | Chemical Research in Chinese Universities2020，36，6： | 1 |
| 16 | Inpainting for remotely sensed images with a multichannel nonlocal total variation model显示文摘 | Cheng Qing Shen Huanfeng Zhang Liangpei | 2014 | IEEE Trans on Geoscience and Remote Sensing2014，52，1： | 1 |
| 17 | Synthesis of polysubstituted pyrroles via Pd-catalyzed oxidative alkene C-H bond arylation and amination显示文摘 | Zheng Jia Huang Liangbin Jiang Huanfeng | 2015 | J Org Chem2015，80，： | 1 |
| 18 | A Super-resolution Reconstruction Algorithm for Hyperspectral Images显示文摘 | Zhang Hongyan Zhang Liangpei Shen Huanfeng | 2012 | Signal Processing2012，92，9： | 1 |
| 19 | A MAP approach for joint motion estimation,segmentation,and super resolution显示文摘 | Shen Huanfeng Zhang Liangpei Huang Bo | 2007 | IEEE Transactions on Image Processing2007，16，2： | 1 |
| 20 | Palladium - catalyzed diacetoxylation of alkenes with molecular oxygen as sole oxidant显示文摘 | Azhong W Huanfeng J Huoji C | 2009 | Journal of the American Chemical Society2009，131，： | 1 |
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