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| 1 | Malus-metasurface-assisted polarization multiplexing显示文摘Polarization optics plays a pivotal role in diffractive,refractive,and emerging flat optics,and has been widely employed in contemporary optical industries and daily life.Advanced polarization manipulation leads to robust control of the polarization direction of light.Nevertheless,polarization control has been studied largely independent of the phase or intensity of light.Here,we propose and experimentally validate a Malus-metasurface-assisted paradigm to enable simultaneous and independent control of the intensity and phase properties of light simply by polarization modulation.The orientation degeneracy of the classical Malus’s law implies a new degree of freedom and enables us to establish a one-to-many mapping strategy for designing anisotropic plasmonic nanostructures to engineer the Pancharatnam–Berry phase profile,while keeping the continuous intensity modulation unchanged.The proposed Malus metadevice can thus generate a near-field greyscale pattern,and project an independent far-field holographic image using an ultrathin and single-sized metasurface.This concept opens up distinct dimensions for conventional polarization optics,which allows one to merge the functionality of phase manipulation into an amplitudemanipulation-assisted optical component to form a multifunctional nano-optical device without increasing the complexity of the nanostructures.It can empower advanced applications in information multiplexing and encryption,anti-counterfeiting,dual-channel display for virtual/augmented reality,and many other related fields. | Liangui Deng Juan Deng Zhiqiang Guan Jin Tao Yang Chen Yan Yang Daxiao Zhang Jibo Tang Zhongyang Li Zile Li Shaohua Yu Guoxing Zheng Hongxing Xu Cheng-Wei Qiu Shuang Zhang | 2020 | Light(Science & Applications)2020，9，1： | 7 |
| 2 | Groundwater evapotranspiration under psammophilous vegetation covers in the Mu Us Sandy Land, northern China显示文摘Groundwater is a significant component of the hydrological cycle in arid and semi-arid areas. Its evapotranspiration is an important part of the water budget because many plants are groundwater-dependent. To restore the degraded ecosystems, the need is pressing to further our understanding of the groundwater evapotranspiration(ET_g) in arid and semi-arid areas. This study employed the White method to estimate ET_g at four sites in the Mu Us Sandy Land in northern China, and the four sites are covered by Salix psammophila(SP site), Artemisia ordosica(AO site), Poplar alba(PA site), and Carex enervis(CE site), respectively. The depth of groundwater table and the duration of drainage were taken into account in calculating the specific yield(S_y) to improve the accuracy of the ET_g estimats. Our results showed that from late May to early November 2013 the ET_g were 361.87(SP site), 372.53(AO site), 597.86(PA site) and 700.76 mm(CE site), respectively. The estimated ET_g rate was also species-dependent and the descending order of the ET_g rate for the four vegetation was: C. enervis, P. alba, A. ordosica, and S. psammophila. In addition, the depth of groundwater table has an obvious effect on the ET_g rate and the effect varied with the vegetation types. Furthermore, the evapotranspiration for the vegetation solely relying on the water supply from unsaturated layers above the groundwater table was much less than that for the vegetation heavily relying on the water supply from shallow aquifers. | CHENG Donghui DUAN Jibo QIAN Kang QI Lijun Yang Hongbin CHEN Xunhong | 2017 | Journal of Arid Land2017，9，1： | 4 |
| 3 | Utilize cloud computing to support dust storm forecasting显示文摘The simulations and potential forecasting of dust storms are of significant interest to public health and environment sciences.Dust storms have interannual variabilities and are typical disruptive events.The computing platform for a dust storm forecasting operational system should support a disruptive fashion by scaling up to enable high-resolution forecasting and massive public access when dust storms come and scaling down when no dust storm events occur to save energy and costs.With the capability of providing a large,elastic,and virtualized pool of computational resources,cloud computing becomes a new and advantageous computing paradigm to resolve scientific problems traditionally requiring a large-scale and high-performance cluster.This paper examines the viability for cloud computing to support dust storm forecasting.Through a holistic study by systematically comparing cloud computing using Amazon EC2 to traditional high performance computing(HPC)cluster,we find that cloud computing is emerging as a credible solution for(1)supporting dust storm forecasting in spinning off a large group of computing resources in a few minutes to satisfy the disruptive computing requirements of dust storm forecasting,(2)performing high-resolution dust storm forecasting when required,(3)supporting concurrent computing requirements,(4)supporting real dust storm event forecasting for a large geographic domain by using recent dust storm event in Phoniex,05 July 2011 as example,and(5)reducing cost by maintaining low computing support when there is no dust storm events while invoking a large amount of computing resource to perform high-resolution forecasting and responding to large amount of concurrent public accesses. | Qunying Huang Chaowei Yang Karl Benedict Songqing Chen Abdelmounaam Rezgui Jibo Xie | 2013 | International Journal of Digital Earth2013，6，4： | 2 |
| 4 | Organic Fluorescent Molecule with High Solid State Lumines- cent Efficiency and Protonation Stimuli-response显示文摘有高稳固的州的光效率的新奇器官的 fluorophor 基于 1,4 二度(2,2-di (pyridin-2-yl ) 乙烯基) ,苯(BDP2VB ) 被设计并且综合。它在答案微弱地射出,但是处于总数状态成为强壮的 emitter,证明它的聚集导致了排放(AIE ) 性质。根据水晶结构分析, J 类型聚集在分子的收拾行李的模式被形成,它被表明有益增加高荧光灯处于稳固的状态的量效率。另外, BDP2VB 的排放颜色能由 protonation 刺激处于稳固的状态以及在答案戏剧性地变化。 | Suqian Ma Jibo Zhang Jinlong Chen Lijuan Wang Bin Xu Wenjing Tian | 2013 | Chinese Journal of Chemistry2013，31，11： | 1 |
| 5 | Assessing the Forecasting of Comprehensive Loss Incurred by Typhoons:A Combined PCA and BP Neural Network Model显示文摘This paper develops a joint model utilizing the principal component analysis(PCA)and the back propagation(BP)neural network model optimized by the Levenberg Marquardt(LM)algorithm,and as an application of the joint model to investigate the damages caused by typhoons for a coastal province,Fujian Province,China in 2005-2015(latest).First,the PCA is applied to analyze comprehensively the relationship between hazard factors,hazard bearing factors and disaster factors.Then five integrated indices,overall disaster level,typhoon intensity,damaged condition of houses,medical rescue and self-rescue capability,are extracted through the PCA;Finally,the BP neural network model,which takes the principal component scores as input and is optimized by the LM algorithm,is implemented to forecast the comprehensive loss of typhoons.It is estimated that an average annual loss of 138.514 billion RMB occurred for 2005-2015,with a maximum loss of 215.582 in 2006 and a decreasing trend since 2010 though the typhoon intensity increases.The model was validated using three typhoon events and it is found that the error is less than 1%.These results provide information for the government to increase medical institutions and medical workers and for the communities to promote residents’self-rescue capability. | Shuai Yuan Guizhi Wang Jibo Chen Wei Guo | 2019 | Journal on Artificial Intelligence2019，1，2： | 1 |
| 6 | Highly pathogenic coronavirus N protein aggravates inflammation by MASP-2-mediated lectin complement pathway overactivation显示文摘Excessive inflammatory responses contribute to the pathogenesis and lethality of highly pathogenic human coronaviruses,but the underlying mechanism remains unclear.In this study,the N proteins of highly pathogenic human coronaviruses,including severe acute respiratory syndrome coronavirus(SARS-CoV),middle east respiratory syndrome coronavirus(MERS-CoV)and severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),were found to bind MASP-2,a key serine protease in the lectin pathway of complement activation,resulting in excessive complement activation by potentiating MBL-dependent MASP-2 activation,and the deposition of MASP-2,C4b,activated C3 and C5b-9.Aggravated inflammatory lung injury was observed in mice infected with adenovirus expressing the N protein.Complement hyperactivation was also observed in SARS-CoV-2-infected patients.Either blocking the N protein:MASP-2 interaction,MASP-2 depletion or suppressing complement activation can significantly alleviate N protein-induced complement hyperactivation and lung injury in vitro and in vivo.Altogether,these data suggested that complement suppression may represent a novel therapeutic approach for pneumonia induced by these highly pathogenic coronaviruses. | Ting Gao Lin Zhu Hainan Liu Xiaopeng Zhang Tingting Wang Yangbo Fu Hongzhen Li Qincai Dong Yong Hu Zhang Zhang Jing Jin Zijing Liu Weihong Yang Yaoning Liu Yanwen Jin Kaitong Li Yongjiu Xiao Junli Liu Huailong Zhao Yue Liu Ping Li Jibo Song Lu Zhang Yuwei Gao Sisi Kang Shoudeng Chen Qingjun Ma Xiuwu Bian Wei Chen Xuan Liu Qing Mao Cheng Cao | 2022 | Signal Transduction and Targeted Therapy2022，7，10： | 0 |
| 7 | Ultrafast photocarrier and coherent phonon dynamics in type-II Dirac semimetal PtTe2 thin films probed by optical spectroscopy显示文摘We report the ultrafast photocarrier dynamics and coherent phonon excitation in type-II Dirac semimetal platinum ditelluride(PtTe2)thin films via femtosecond(fs)pump-probe spectroscopy at room temperature.Quantitative analysis revealed that the incoherent electronic relaxation consists of two components:a subpicosecond fast relaxation process and a slow component with a time constant of hundreds of picoseconds(ps).Furthermore,the launch of a coherent acoustic phonon(CAP)in the 20 nm film but absence in the 6.8 nm film uncovers the dominant role of temperature gradient in producing a strain wave.The sound velocity and Young’s modulus in the thick PtTe_(2) are determined to be 1.736 km/s and 29.5 GPa,respectively.In addition,the coherent optical phonon(COP)with a frequency of 4.7 THz corresponding to Te atoms out-of-plane A1g vibration has been well resolved in all films,which is ascribed to displacive excitation of coherent phonon(DECP).The observation of a strong probe-wavelength dependent COP amplitude reveals the resonant feature of the optical excitation-induced atomic displacement in PtTe2.Our findings provide deep insight into the excitation and dynamics of CAP and COP as well as the photocarriers’recovery pathway and lifetimes in PtTe_(2).Our study also demonstrates that the COP spectroscopy is a powerful tool to reveal the modulation of frequency-dependent optical constants induced by atomic vibrations,which may find applications in the fields of optoelectronics and ultrafast photonics. | Peng Suo Shengnan Yan Ruihua Pu Wenjie Zhang Di Li Jiaming Chen Jibo Fu Xian Lin Feng Miao Shi-Jun Liang Weimin Liu Guohong Ma | 2022 | Photonics Research2022，10，3： | 0 |
| 8 | Molecular crystals based on 9,10-distyrylanthracene derivatives with high solid state fluorescence efficiency and uniaxial orientation induced by supramolecular interactions显示文摘Two 9,10-distyrylanthracene (DSA) derivatives CNDSA and t-BUDSA were designed and synthesized, and their photophysical properties and crystal structures were investigated. Compared to DSA, the maximum emission peaks of the two compounds showed red-shift not only in THF solution, but also in crystals, because the introduction of electron-withdrawing substituents to DSA leads to more dispersion of the electrons in the molecules. The two crystals of CNDSA and t-BUDSA show strong fluores- cence with the efficiency F of 45% and 33%, respectively, which may be resulted from no obvious-interactions between molecules inside the crystal due to the large distance between the two adjacent molecules and nearly no overlap between the central anthracene planes. The analysis of crystal structures of the two compounds indicated that the molecules are arranged in the same conformation and orientation in their crystals, i.e. uniaxially oriented packing crystal, because of the supramolecular interac- tion of CH/ in the two crystals and additional C-H···N interactions in CNDSA. | CHEN JinLong MA SuQian XU Bin ZHANG JiBo DONG YuJie TIAN WenJing | 2013 | Chinese Science Bulletin2013，58，22： | 0 |
| 9 | Study on Dynamic Mechanical Behavior of Al-Mg-Si Alloy显示文摘The dynamic mechanical behavior of Al-Mg-Si alloy was investigated under different strain rates by mechanical property and microstructure characterization,constitutive behavior analysis and numerical simulation in the present study.As the strain rate increases,the yield strength,ultimate tensile strength and elongation increase first,then remain almost constant,and finally increase.The alloy always exhibits a typical ductile fracture mode,not depending on the strain rate.However,as the strain rate increases,the number of dimples gradually increases.Tensile deformation can refine grains,however,the grain structure is slightly affected by the strain rate.An optimized Johnson-Cook constitutive equation was used to describe the mechanical behavior and obtained by fitting the true stress-strain curves.The parameter C was described by a function related to the strain rate.The fitting true stress-strain curves by the JC model agree very well with the experimental true stress-strain curves.The true stress-strain curves calculated by the finite element numerical simulation agree well with the experimental true stress-strain curves. | 陶小旺 LIU Jibo LIU Xianbin CHEN Jianbin WANG Yonggang 汪小锋 | 2024 | Journal of Wuhan University of Technology(Materials Science)2024，39，2： | 0 |
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