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15篇 您的检索式:作者名="Tonghao Liu"
    题名 作者 年代 出处 被引量
1Regio- and (E)-Stereoselective Triborylation of Propargylic Carbonates显示文摘Zheng Yang Tao Cao Yulin Han Weilong Lin Qi Liu Yang Tang Yizhan Zhai Minqiang Jia Wanli Zhang Tonghao Zhu Shengming Ma 2017Chinese Journal of Chemistry2017,35,8:2
2Adsorption of methylene blue from aqueous solution by graphene 显示文摘Tonghao Liu Yanhui Li Qiuju Du 2012Colloids and Surfaces B: Biointerfaces2012,90,:1
3Adsorption of methylene blue from aqueous solution by graphene显示文摘Liu Tonghao Li Yanhui Du Qqiuju 2012Colloids and Surfaces B:Biointerfaces2012,90,:1
4Urea method for the synthesis of hydrotalcites显示文摘Piaoping Yang Jianfeng Yu Zhenlü Wang Qingsheng Liu Tonghao Wu 2004Reaction Kinetics and Catalysis Letters2004,,2:1
5Machine-learning-empowered multispectral metafilm with reduced radar cross section,low infrared emissivity,and visible transparency显示文摘For camouflage applications,the performance requirements for metamaterials in different electromagnetic spectra are usually contradictory,which makes it difficult to develop satisfactory design schemes with multispectral compatibility.Fortunately,empowered by machine learning,metamaterial design is no longer limited to directly solving Maxwell’s equations.The design schemes and experiences of metamaterials can be analyzed,summarized,and learned by computers,which will significantly improve the design efficiency for the sake of practical engineer-ing applications.Here,we resort to the machine learning to solve the multispectral compatibility problem of metamaterials and demonstrate the design of a new metafilm with multiple mechanisms that can realize small microwave scattering,low infrared emissivity,and visible transparency simultaneously using a multilayer back-propagation neural network.The rapid evolution of structural design is realized by establishing a mapping between spectral curves and structural parameters.By training the network with different materials,the designed network is more adaptable.Through simulations and experimental verifications,the designed architecture has good accuracy and robustness.This paper provides a facile method for fast designs of multispectral metafilms that can find wide applications in satellite solar panels,aircraft windows,and others.RUICHAO ZHU JIAFU WANG JINMING JIANG CUILIAN XU CHE LIU YUXIANG JIA SAI SUI ZHONGTAO ZHANG TONGHAO LIU ZUNTIAN CHU JUN WANG TIE JUN CUI SHAOBO QU 2022Photonics Research2022,10,5:1
6Equilibrium, kinetic and thermodynamic studies on the adsorption of phenol onto graphene显示文摘Yanhui Li Qiuju Du Tonghao Liu Jiankun Sun Yuqin Jiao Yanzhi Xia Linhua Xia Zonghua Wang Wei Zhang Kunlin Wang Hongwei Zhu Dehai Wu 2012Materials Research Bulletin2012,,8:1
7Cr-MCM-41 Molecular Sieves Crystallized at Room Temperature for Reaction of Ethane with CO_(2)显示文摘A series of Cr-containing MCM-41 molecular sieves crystallized at room temperature with a hexagonal and well-ordered structure were synthesized. XRD, FT-IR and DRS UV-Vis techniques were used to characterize the samp.es. The results indicate incorporation of Cr into the MCM-41 framework, and dispersion of some Cr2O3 on the surface or/and in the bulk of the MCM-41. Test of catalytic properties of the series of samples for the topic reaction was carried out using a continuous-flow fixed-bed quartz reactor. Factors influencing the catalytic performance for this title reaction, such as Cr/Si ratio in MCM- 41 and reaction temperature were investigated. The experimental results indicate that over the 5%Cr- MCM-41 a 43.27% conversion of ethane and a 86.70% selectivity for ethylene were achieved in the ethane dehydrogenation with CO2 to ethylene at 973 K. It is suggested that both Cr6+ and Cr3+ are the catalytic activity center.Yanan Li Xin He Shujie Wu Ke Zhang Guangdong Zhou Jie Liu Kaiji Zhen Tonghao Wu Tiexin Cheng 2005Journal of Natural Gas Chemistry2005,14,4:1
8Remotely mind-controlled metasurface via brainwaves显示文摘The power of controlling objects with mind has captivated a popular fascination to human beings.One possible path is to employ brain signal collecting technologies together with emerging programmable metasurfaces(PM),whose functions or operating modes can be switched or customized via on-site programming or pre-defined software.Nevertheless,most of existing PMs are wire-connected to users,manually-controlled and not real-time.Here,we propose the concept of remotely mind-controlled metasurface(RMCM)via brainwaves.Rather than DC voltage from power supply or AC voltages from signal generators,the metasurface is controlled by brainwaves collected in real time and transmitted wirelessly from the user.As an example,we demonstrated a RMCM whose scattering pattern can be altered dynamically according to the user’s brain waves via Bluetooth.The attention intensity information is extracted as the control signal and a mapping between attention intensity and scattering pattern of the metasurface is established.With such a framework,we experimentally demonstrated and verified a prototype of such metasurface system which can be remotely controlled by the user to modify its scattering pattern.This work paves a new way to intelligent metasurfaces and may find applications in health monitoring,5G/6G communications,smart sensors,etc.Ruichao Zhu Jiafu Wang Tianshuo Qiu Yajuan Han Xinmin Fu Yuzhi Shi Xingsi Liu Tonghao Liu Zhongtao Zhang Zuntian Chu Cheng‑Wei Qiu Shaobo Qu 2022eLight2022,2,1:1
9Adsorption of fluoride from aqueous solution by graphene显示文摘Yanhui Li Pan Zhang Qiuju Du Xianjia Peng Tonghao Liu Zonghua Wang Yanzhi Xia Wei Zhang Kunlin Wang Hongwei Zhu Dehai Wu 2011Journal of Colloid And Interface Science2011,,1:1
10Impact of national NO x and SO 2 control policies on particulate matter pollution in China显示文摘Bin Zhao Shuxiao Wang Jiandong Wang Joshua S. Fu Tonghao Liu Jiayu Xu Xiao Fu Jiming Hao 2013Atmospheric Environment2013,,:1
11Direct field-to-pattern monolithic design of holographic metasurface via residual encoderdecoder convolutional neural network显示文摘Complex-amplitude holographic metasurfaces(CAHMs)with the flexibility in modulating phase and amplitude profiles have been used to manipulate the propagation of wavefront with an unprecedented level,leading to higher image-reconstruction quality compared with their natural counterparts.However,prevailing design methods of CAHMs are based on Huygens-Fresnel theory,meta-atom optimization,numerical simulation and experimental verification,which results in a consumption of computing resources.Here,we applied residual encoder-decoder convolutional neural network to directly map the electric field distributions and input images for monolithic metasurface design.A pretrained network is firstly trained by the electric field distributions calculated by diffraction theory,which is subsequently migrated as transfer learning framework to map the simulated electric field distributions and input images.The training results show that the normalized mean pixel error is about 3%on dataset.As verification,the metasurface prototypes are fabricated,simulated and measured.The reconstructed electric field of reverse-engineered metasurface exhibits high similarity to the target electric field,which demonstrates the effectiveness of our design.Encouragingly,this work provides a monolithic field-to-pattern design method for CAHMs,which paves a new route for the direct reconstruction of metasurfaces.Ruichao Zhu Jiafu Wang Tianshuo Qiu Dingkang Yang Bo Feng Zuntian Chu Tonghao Liu Yajuan Han Hongya Chen Shaobo Qu 2023Opto-Electronic Advances2023,6,8:0
12A copper-catalyzed three-component reaction of alkenes,cycloketone oximes and DABCO·(SO_(2))_(2):Direct C(sp^(2))-H cyanoalkylsulfonylation显示文摘A copper-catalyzed three-component reaction of alkenes,cycloketone oximes and DABCO·(SO_(2))_(2) is de-veloped,which provides a convenient route for the synthesis of diverse(E)-cyanoalkylsulfonyl alkenes in moderate to good yields with excellent regio-and stereoselectivity.A broad substrate scope with ex-cellent functional group tolerance is observed.A plausible radical pathway is proposed,which involves copper-catalyzed ring-opening C–C bond cleavage of O-acyl oxime and insertion of sulfur dioxide.During the reaction process,cyanoalkyl radical and cyanoalkylsulfonyl radical are the key intermediates.Yating Liu Luoyu Wang Ling-Hui Zeng Yun Zhao Tonghao Zhu Jie Wu 2022Chinese Chemical Letters2022,33,5:0
13Six-channel programmable coding metasurface simultaneously for orthogonal circular and linear polarizations显示文摘Metasurfaces have intrigued long-standing research interests and developed multitudinous compelling applications owing to their unprecedented capability for manipulating electromagnetic waves,and the emerging programmable coding metasurfaces(PCMs)provide a real-time reconfigurable platform to dynamically implement customized functions.Nevertheless,most existing PCMs can only act on the single polarization state or perform in the limited polarization channel,which immensely restricts their practical application in multitask intelligent metadevices.Herein,an appealing strategy of the PCM is proposed to realize tunable functions in co-polarized reflection channels of orthogonal circularly polarized waves and in co-polarized and cross-polarized reflection channels of orthogonal linearly polarized waves from 9.0 to 10.5 GHz.In the above six channels,the spindecoupled programmable meta-atom can achieve high-efficiency reflection and 1-bit digital phase modulation by selecting the specific ON/OFF states of two diodes,and the phase coding sequence of the PCM is dynamically regulated by the field-programmable gate array to generate the desired function.A proof-of-concept prototype is constructed to verify the feasibility of our methodology,and numerous simulation and experimental results are in excellent agreement with the theoretical predictions.This inspiring design opens a new avenue for constructing intelligent metasurfaces with higher serviceability and flexibility,and has tremendous application potential in communication,sensing,and other multifunctional smart metadevices.TONGHAO LIU YUEYU MENG JIAFU WANG HUA MA RUICHAO ZHU CHAO LIU WEIHAN LI ZUNTIAN CHU SAI SUI TIANSHUO QIU WENXUAN TANG SHAOBO QU 2023Photonics Research2023,11,6:0
14Leaky cavity modes in metasurfaces:a route to low-loss wideband anomalous dispersion显示文摘Metasurfaces have provided unprecedented degrees of freedom in manipulating electromagnetic waves upon interfaces.In this work,we first explore the condition of wide operating bandwidth in the view of reflective scheme,which indicates the necessity of anomalous dispersion.To this end,the leaky cavity modes(LCMs)in the metaatom are analyzed and can make effective permittivity inversely proportional to frequency.Here we employ the longitudinal Fabry-Perot(F-P)resonances and transverse plasmonic resonances to improve the LCMs efficiency.It is shown that the order of F-P resonance can be customized by the plasmonic modes,that is,the F-P cavity propagation phase should match the phase delay of surface currents excited on the meta-atom.The nth order F-P resonance will multiply the permittivity by a factor of n,allowing larger phase accumulation with increasing frequencies and forming nonlinear phase distribution which can be applied in weak chromatic-aberration focusing design.As a proof-of-concept,we demonstrate a planar weak chromatic-aberration focusing reflector with a thickness ofλ_(0)∕9 at 16.0-21.0 GHz.This work paves a robust way to advanced functional materials with anomalous dispersion and can be extended to higher frequencies such as terahertz,infrared,and optical frequencies.XIAOFENG WANG JIAFU WANG YAJUAN HAN MINGBAO YAN YONGFENG LI TONGHAO LIU HUA MA SHAOBO QU 2023Photonics Research2023,11,6:0
15Improved atmospheric mercury simulation using updated gas-particle partition and organic aerosol concentrations显示文摘The gaseous or particulate forms of divalent mercury(HgⅡ) significantly impact the spatial distribution of atmospheric mercury concentration and deposition flux(FLX). In the new nested-grid GEOS-Chem model, we try to modify the HgⅡ gas-particle partitioning relationship with synchronous and hourly observations at four sites in China. Observations of gaseous oxidized Hg(GOM), particulate-bound Hg(PBM), and PM 2.5 were used to derive an empirical gas-particle partitioning coefficient as a function of temperature( T) and organic aerosol(OA) concentrations under different relative humidity(RH). Results showed that with increasing RH, the dominant process of HgⅡ gas-particle partitioning changed from physical adsorption to chemical desorption. And the dominant factor of HgⅡ gas-particle partitioning changed from T to OA concentrations. We thus improved the simulated OA concentration field by introducing intermediate-volatility and semi-volatile organic compounds(I/SVOCs) emission inventory into the model framework and refining the volatile distributions of I/SVOCs according to new filed tests in the recent literatures. Finally, normalized mean biases(NMBs) of monthly gaseous element mercury(GEM), GOM, PBM, WFLX were reduced from-33%–29%, 95%–300%, 64%–261%, 117%–122% to-13%–0%,-20%–80%,-31%–50%,-17%–23%. The improved model explains 69%–98% of the observed atmospheric Hg decrease during 2013–2020 and can serve as a useful tool to evaluate the effectiveness of the Minamata Convention on Mercury.Kaiyun Liu Qingru Wu Shuxiao Wang Xing Chang Yi Tang Long Wang Tonghao Liu Lei Zhang Yu Zhao Qin’geng Wang Jinsheng Chen 2022Journal of Environmental Sciences2022,34,9:0
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