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46篇 您的检索式:作者名="FENG PENGCHENG"
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1Iron-based high transition temperature superconductors显示文摘In a superconductor electrons form pairs and electric transport becomes dissipation-less at low temperatures. Recently discovered iron-based superconductors have the highest superconducting transition temperature next to copper oxides. In this article, we review material aspects and physical properties of iron-based superconductors. We discuss the dependence of transition temperature on the crystal structure,the interplay between antiferromagnetism and superconductivity by examining neutron scatering experiments, and the electronic properties of these compounds obtained by angle-resolved photoemission spectroscopy in link with some results from scanning tunneling microscopy/spectroscopy measurements.Possible microscopic model for this class of compounds is discussed from a strong coupling point of view.Xianhui Chen Pengcheng Dai Donglai Feng Tao Xiang Fu-Chun Zhang 2014National Science Review2014,1,3:12
2Multifunctional metasurfaces enabled by simultaneous and independent control of phase and amplitude for orthogonal polarization states显示文摘Monochromatic light can be characterized by its three fun dame ntal properties:amplitude,phase,and polarization.In this work,we propose a versatile,transmission-mode all-dielectric metasurface platform that can independently manipulate the phase and amplitude for two orthogonal states of polarization in the visible frequency range.For proof-o仁concept experimental demonstration,various single-layer metasurfaces composed of subwavelength-spaced titanium-dioxide nanopillars are designed,fabricated,and characterized to exhibit the ability of polarization-switchable multidimensional light-field manipulation,including polarization-switchable grayscale nanoprinting,nonuniform cylindrical lensing,and complex-amplitude holography.We envision the metasurface platform dem on strated here to open new possibilities toward creating compact multifunctional optical devices for applications in polarization optics,information encoding,optical data storage,and security.Mingze Liu Wenqi Zhu Pengcheng Huo Lei Feng Maowen Song Cheng Zhang Lu Chen Henri JLezec Yanqing Lu Amit Agrawal Ting Xu 2021Light(Science & Applications)2021,10,6:8
3Late Paleozoic to Mesozoic extension in southwestern Fujian Province, South China: Geochemical, geochronological and Hf isotopic constraints from basic-intermediate dykes显示文摘The tectonic evolution of SE China block since late Paleozoic remains debated.Here we present a new set of zircon U-Pb geochronological,Lu-Hf isotopic data and whole-rock geochemistry for two stages of basicintermediate dykes from the southwestern Fujian.The samples were collected from the NE-trending(mainly diabases) and NW-trending(mainly diabasic diorites) dykes and yielded zircon U-Pb ages of 315 and 141 Ma,with ε_(Hf)(t) values of-8.90 to 7.49 and-23.39 to-7.15(corresponding to T_(DM2) values of 850 to 1890 Ma and 737 to 2670 Ma),respectively.Geochemically these rocks are characterized by low TiO_2(0.91-1.73 wt.%)and MgO(3.04-7.96 wt.%),and high Al_2O_3(12.5-16.60 wt.%) and K_2O(0.60-3.63 wt.%).Further they are enriched in LREEs and ULEs(Rb,Ba,Th and K).but depleted in HFSEs(Nb,Ta and Zr).The tectonic discrimination analysis revealed that the dykes were formed in an intraplate extensional environment.However,the NW trending dykes show crust-mantle mixed composition,which indicate an extensional tectonic setting with evidence for crustal contamination.The SE China block experienced two main stages of extensional tectonics from late Carboniferous to early Cretaceous.The tectonic evolution of the SE China block from late Devonian to Cretaceous is also evaluated.Sen Wang Da Zhang Ganguo Wu Absai Vatuva Yongjun Di Pengcheng Yan Haibin Feng Shuai Ma 2017Geoscience Frontiers2017,8,3:6
4Nyquist Stability Analysis and Capacitance Selection for DC Current Flow Controllers in Meshed Multi-terminal HVDC Grids显示文摘Controllability of DC current/power flow is essentialin multi-terminal HVDC (MTDC) grids, particularly for theMTDC grids in a meshed topology. In this paper, consideringmeshed MTDC (M2TDC) grids with the installation of twoline/multi-lineDC current flow controllers (CFCs), a small-signalmodel of the DC CFCs integrated M2TDC grids is derived,studying the impact of the power losses of the DC CFC andtheir influence on the analysis of energy exchanges. The systemstability analysis is analysed using the Nyquist diagram, which ismore suitable for analyzing complex nonlinear systems with morecompact and reliable indicators of stability in comparison withgain/phase margins shown in the Bode diagram. In addition, aselection method of the interconnected capacitor of the DC CFCis proposed under different operating conditions. The impact ofthe switching frequencies of the DC CFC on the control ranges ofthe DC current flows is analyzed. The effectiveness of the Nyquistanalysis and the capacitance selection method is verified bysimulation studies using PSCAD/EMTDC. The obtained control ranges of the DC CFC with different switching frequenciesand capacitances would be useful for practical engineeringapplications.Puyu Wang Shihua Feng Pengcheng Liu Ningqiang Jiang Xiao-Ping Zhang 2021CSEE Journal of Power and Energy Systems2021,7,1:3
5Genomic and transcriptomic analysis unveils population evolution and development of pesticide resistance in fall armyworm Spodoptera frugiperda显示文摘The fall armyworm(FAW),Spodoptera frugiperda,is a destructive pest native to America and has recently become an invasive insect pest in China.Because of its rapid spread and great risks in China,understanding of FAW genetic background and pesticide resistance is urgent and essential to develop effective management strategies.Here,we assembled a chromosome-level genome of a male FAW(SFynMstLFR)and compared re-sequencing results of the populations from America,Africa,and China.Strain identification of 163 individuals collected from America,Africa and China showed that both C and R strains were found in the American pop-ulations,while only C strain was found in the Chinese and African populations.Moreover,population geno-mics analysis showed that populations from Africa and China have close relationship with significantly genetic differentiation from American populations.Taken toge-ther,FAWs invaded into China were most likely origi-nated from Africa.Comparative genomics analysis displayed that the cytochrome p450 gene family is extremely expanded to 425 members in FAW,of which 283 genes are specific to FAW.Treatments of Chinese populations with twenty-three pesticides showed the variant patterns of transcriptome profiles,and several detoxification genes such as AOX,UGT and GST spe-cially responded to the pesticides.These findings will be useful in developing effective strategies for manage-ment of FAW in China and other invaded areas.Furong Gui Tianming Lan Yue Zhao Wei Guo Yang Dong Dongming Fang Huan Liu Haimeng Li Hongli Wang Ruoshi Hao Xiaofang Cheng Yahong Li Pengcheng Yang Sunil Kumar Sahu Yaping Chen Le Cheng Shuqi He Ping Liu Guangyi Fan Haorong Lu Guohai Hu Wei Dong Bin Chen Yuan Jiang Yongwei Zhang Hanhong Xu Fei Lin Bernard Slippers Alisa Postma Matthew Jackson Birhan Addisie Abate Kassahun Tesfaye Aschalew Lemma Demie Meseret Destaw Bayeleygne Dawit Tesfaye Degefu Feng Chen Paul K.Kuria Zachary M.Kinyua Tong-Xian Liu Huanming Yang Fangneng Huang Xin Liu Jun Sheng Le Kang 2022Protein & Cell2022,13,7:2
6High performance organic transistors and phototransistors based on diketopyrrolopyrrole-quaterthiophene copolymer thin films fabricated via low-concentration solution processing显示文摘Conjugated polymers have received considerable attentions over the past years due to their large-area potential applications via low-cost solution processing.Improving crystallinity of conjugated polymer molecules in solution-processed thin films is crucial for their efficient charge transport and thus high performance optoelectronic devices.Herein,with diketopyrrolopyrrole-quaterthiophene(PDQT)copolymer as an example,it is found that by simply reducing the solution concentration for spincoating meanwhile with the assistance of post-annealing,significantly enhanced film crystallinity with formation of typical single crystalline domains is obtained,which benefits from the enough space for better molecular assembly especially at the semiconductor/dielectric interface.High performance polymer transistors and phototransistors were finally constructed based on the optimal lowconcentration(2 mg/mL)spin-coated PDQT films(12 nm),which giving a high charge carrier mobility of 2.28 cm^2V^(-1)s^(-1)and a photoresponse on/off ratio of 2.1×10~7at V_G=0 V under white light irradiation of6 mW/cm^2.The results suggest that the bright future of PDQT crystalline films for large-area flexible integrated optoelectronic devices and the application of effective low-concentration processing approach in solution-processed organic electronics with reduced material waste.Pengcheng Gu Mengxiao Hu Shang Ding Guangyao Zhao Yifan Yao Feng Liu Xiaotao Zhang Huanli Dong Xiangke Wang Wenping Hu 2018Chinese Chemical Letters2018,29,11:2
7New Evidence for Improving Omega Estimation by Explicitly Considering Horizontal Divergence显示文摘It is well known that the quasi-geostrophic(QG) omega equation with only two contributors respectively associated with vorticity advection(VA) and temperature advection is derived for midlatitude synoptic-scale systems only. Based on reliable reanalysis data, new evidence revealed by cyclonic and anticyclonic cases indicates that forecasters might sometimes experience problems by paying too much attention to the 500-hPa VA when estimating vertical motions not only in subtropical systems but also in systems meeting all the assumptions of the QG omega equation. Our investigations also showed that explicitly considering the vertical profiles of horizontal divergence could allow for better interpretation of vertical motions and weather in these real cases, suggesting that this equation might not be sufficient due to the presence of only two horizontaldivergence-related(HDR) mechanisms and the absence of other HDR mechanisms, e.g., frictional force, mountain barriers, diabatic/adiabatic processes, and acceleration/deceleration of air flows.YUAN Zhuojian QI Jindian GAO Shouting FENG Yerong XU Pengcheng WU Naigeng 2014Advances in Atmospheric Sciences2014,31,2:2
8Calculation of depth to detachment and its significance in the Kuqa Depression:A discussion显示文摘We analyze the excess area and depth to detachment method developed by Epard and Groshong(1993),and apply it to the sand box model of Ge et al(2004) to illustrate that inadequate consideration will affect the calculation of true depth to detachment.Using the data of Yu et al(2006) to fit linear regression lines,we obtain the depths to detachment of Kela-2,Misikantage anticline and Dongqiu-8 structures,115.74km,14.17km,and 75.48km below the reference level(Cretaceous bottom) respectively with the excess area intercept equal to zero.However,the calculation results of depth to detachment in Yu et al(2006) are based on excess area intercept unequal to zero.Li Shiqin Feng Lei Tang Pengcheng Rao Gang Bao Yahong 2009Petroleum Science2009,6,1:2
9Development of Nucleic Acid Sequence-Based Amplification Assay for Detection of Macrobrachium rosenbergii Nodavirus显示文摘A nucleic acid sequence-based amplification(NASBA)assay was established for the detection of Macrobrachium rosenbergii Nodavirus(MrNV).The specific primers were designed according to the high conserved region of RNA2 sequence of MrNV.The 224 bp specific amplification product was obtained in positive sample determined with 3%agarose gel electrophoresis,while no product was generated from shrimp infected with other viruses including DNA viruses(IHHNV,WSSV)and RNA viruses(TSV,IMNV,YHV).The detecting limit of the assay was 8pg nucleic acid,which is more sensitive than that of PCR method.Feng LIN Li LIU Dong QIAN Guijie HAO Pengcheng SHENG Zheng CAO Xuemei YUAN Jinyu SHEN 2014Agricultural Biotechnology2014,3,3:2
10The antioxidant activity of glucosamine hydrochloride in vitro显示文摘Ronge Xing Song Liu Zhanyong Guo Huahua Yu Cuiping Li Xia Ji Jinhua Feng Pengcheng Li 2005Bioorganic & Medicinal Chemistry2005,,6:1
11Global Orlicz regularity for sub-Laplace equations on homogeneous groups显示文摘Xiaojing Feng Pengcheng Niu 2012Bulletin des sciences mathématiques2012,,6:1
12The C_(6)D_(6)detector system on the Back-n beam line of CSNS显示文摘Introduction The neutron capture cross sections are very important in the field of nuclear device design and basic physics research.Hydrogen-free liquid scintillator such as C_(6)D_(6)detectors are widely used in the neutron capture cross-sectional measurements for the low neutron sensitivity and fast time response.The Back-n white neutron source at China Spallation Neutron Source is the first spallation white neutron source in China,and it is suitable for neutron capture cross-sectional measurement.Materials and methods A C_(6)D_(6)detector system was built in the Back-n experimental station.The pulse height weighting technique was used to determine the system’s detection efficiency.The response to gamma rays of the C_(6)D_(6)detector was measured,and the energy resolution function was determined.Monte Carlo simulation with Geant4 code was carried out to get the weighting function of this C_(6)D_(6)detector system.Additionally,the systematic uncertainty of the weighting function was also determined.Conclusion According to the experimental and simulation results,this C_(6)D_(6)detector system can be used to measure neutron capture cross section.Jie Ren Xichao Ruan Jie Bao Guangyuan Luan Wei Jiang Qi An Huaiyong Bai Ping Cao Qiping Chen Yonghao Chen Pinjing Cheng Zengqi Cui Ruirui Fan Changqing Feng Minhao Gu Fengqin Guo Changcai Han Zijie Han Guozhu He Yongcheng He Yuefeng He Hanxiong Huang Weiling Huang Xiru Huang Xiaolu Ji Xuyang Ji Haoyu Jiang Hantao Jing Ling Kang Mingtao Kang Bo Li Lun Li Qiang Li Xiao Li Yang Li Yang Li Rong Liu Shubin Liu Xingyan Liu Yinglin Ma Changjun Ning Binbin Qi Zhaohui Song Hong Sun Xiaoyang Sun Zhijia Sun Zhixin Tan Hongqing Tang Jingyu Tang Pengcheng Wang Qi Wang Taofeng Wang Yanfeng Wang Zhaohui Wang Zheng Wang Jie Wen Zhongwei Wen Qingbiao Wu Xiaoguang Wu Xuan Wu Likun Xie Yiwei Yang Han Yi Li Yu Tao Yu Yongji Yu Guohui Zhang Jing Zhang Linhao Zhang Liying Zhang Qingmin Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Yingtan Zhao Liang Zhou Zuying Zhou Danyang Zhu Kejun Zhu Peng Zhu 2019Radiation Detection Technology and Methods2019,3,3:1
13Dual-site fluorescent probe for highly selective and sensitive detection of sulfite and biothiols显示文摘A dual-site fluorescent probe with double bond and aldehyde as reactive sites, was designed for the selective detection of sulfite and biothiols. Sulfite reacts with conjugate bond selectively, while Cys responses with aldehyde and GSH occurs substitution reaction. Different interactions cause different absorption and fluorescence responses. Moreover, it could be further applied in imaging in living cells.Mengyang Li Pengcheng Cui Kun Li Jiahui Feng Mingming Zou Xiaoqi Yu 2018Chinese Chemical Letters2018,29,6:1
14Effect of organo-montmorillonite on aging properties of asphalt显示文摘YU JJANYING FENG PENGCHENG ZHANG HENGLONG WU SHAOPENG 2009Construction and Building Materials2009,23,:1
15Transcriptomic responses of three aphid species to chemical insecticide stress显示文摘Dear Editor,Aphids(Hemiptera:Aphididae)are economically important pests that are distributed worldwide and cause serious economic losses through direct feeding on plant,plant virus transmission,and honeydew production(Zhang and Zhong,1983;Blackman and Eastop,2000).Control of these aphid species relies almost exclusively on the use of chemical insecticides,such as organophosphates,carbamates,pyrethroids,cyclodienes,and neonicotinods.A number of aphid species have become resistant to atKun Guo Pengcheng Yang Jun Chen Hong Lu Feng Cui 2017Science China(Life Sciences)2017,60,8:1
16Effect of organo -montmorillonite on aging properties of asphalt 显示文摘Yu Jianying Feng Pengcheng Zhang Henglong 2009Construction and Building Materials2009,23,:1
17A Solution for Profile Generation in Twin-Screw Multiphase Pumps 显示文摘Cao Feng Xing Ziwen Shu Pengcheng 2000World Pumps2000,,9:1
18Effect of Organo-montmorillonite on Aging Properties of Asphalt 显示文摘Yu Jianying Feng Pengcheng Zhang Henglong 2009Construction and Building Materials2009,23,6:1
19Nonlocal Prior Bayesian Tomographic Reconstruction显示文摘Yang Chen Jianhua Ma Qianjin Feng Limin Luo Pengcheng Shi Wufan Chen 2008Journal of Mathematical Imaging and Vision2008,,2:1
20Research on the improved proportional navigation guidance law using CA- DET 显示文摘Li Pengcheng Yang Suochang Feng Delong 2014Applied Mechanics and Materials2014,488,:1
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