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30篇 您的检索式:作者名="Longhai Li"
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1Beach Morphology and Coastline Evolution in the Southern Bohai Strait显示文摘The beach studied in this paper spans a length of 51 km and is one of several long sandy beaches in the southern Bohai Strait. Due to the obstruction of islands in the northeast and the influence of the underwater topography, the wave environment in the offshore area is complex; beach types and sediment transport characteristics vary along different coasts. The coastlines extracted from six aerial photographs in different years were compared to demonstrate the evolving features. Seven typical beach profiles were selected to study the lateral beach variation characteristics. Continuous wind and wave observation data from Beihuangcheng ocean station during 2009 were employed for the hindcast of the local wave environment using a regional spectral wave model. Then the results of the wave hindcast were incorporated into the LITDRIFT model to compute the sediment transport rates and directions along the coasts and analyze the longshore sand movement. The results show that the coastline evolution of sand beaches in the southern Bohai Strait has spatial and temporal variations and the coast can be divided into four typical regions. Region(I), the north coast of Qimudao, is a slightly eroded and dissipative beach with a large sediment transport rate; Region(II), the southwest coast of Gangluan Port, is a slightly deposited and dissipative beach with moderate sediment transport rate; Region(III), in the central area, is a beach that is gradually transformed from a slightly eroded dissipative beach to a moderately or slightly strong eroded bar-trough beach from west to east with a relatively moderate sediment transport rate. Region(IV), on the east coast, is a strongly eroded and reflective beach with a weak sediment transport rate. The wave conditions exhibit an increasing trend from west to east in the offshore area. The distribution of the wave-induced current inside the wave breaking region and the littoral sediment transport in the nearshore region exhibit a gradual weakening tendency from west to east, which is opposite to the trend of the wave conditions outside the breaking region. The presence of submerged shoal(Dengzhou Shoal), deep trough(Dengzhou Channel), islands and irregular topography influnces the wave climate, beach types, wave-induced current features, littoral sediment transport trends and coastline evolution patterns in the southern Bohai Strait. Human activities, such as the sand exploitation of Dengzhou Shoal and other coastal engineering projects, also influence the beach morphology and coastline evolution.ZHANG Wei WU Jianzheng LI Weiran ZHU Longhai HU Rijun JIANG shenghui SUN Yonggen WANG Huijuan 2015Journal of Ocean University of China2015,14,5:3
2Boosting Chemodynamic Therapy by the Synergistic Effect of Co‑Catalyze and Photothermal Effect Triggered by the Second Near‑Infrared Light显示文摘In spite of the tumor microenvironments responsive cancer therapy based on Fenton reaction(i.e.,chemodynamic therapy,CDT)has been attracted more attentions in recent years,the limited Fenton reaction efficiency is the important obstacle to further application in clinic.Herein,we synthesized novel FeO/MoS2 nanocomposites modified by bovine serum albumin(FeO/MoS2-BSA)with boosted Fenton reaction efficiency by the synergistic effect of co-catalyze and photothermal effect of MoS2 nanosheets triggered by the second near-infrared(NIR II)light.In the tumor microenvironments,the MoS2 nanosheets not only can accelerate the conversion of Fe3+ions to Fe2+ions by Mo4+ions on their surface to improve Fenton reaction efficiency,but also endow FeO/MoS2-BSA with good photothermal performances for photothermal-enhanced CDT and photothermal therapy(PTT).Consequently,benefiting from the synergetic-enhanced CDT/PTT,the tumors are eradicated completely in vivo.This work provides innovative synergistic strategy for constructing nanocomposites for highly efficient CDT.Songtao Zhang Longhai Jin Jianhua Liu Yang Liu Tianqi Zhang Ying Zhao Na Yin Rui Niu Xiaoqing Li Dongzhi Xue Shuyan Song Yinghui Wang Hongjie Zhang 2020Nano-Micro Letters2020,12,12:2
3Preparation and charac- terization of graphitie carbon nitride through pyrolysis of mela- mine显示文摘Li Xuefei Zhang Jian Shen Longhai 2009Applied Physics A2009,94,2:1
4The formation mechanism of titania nanotube arrays in hydrofluoric acid electrolyte显示文摘Jing Bai Baoxue Zhou Longhai Li Yanbiao Liu Qing Zheng Jiahui Shao Xinyuan Zhu Weimin Cai Junsheng Liao Lexi Zou 2008Journal of Materials Science2008,,6:1
5Formation and growth mechanism of ripple-like A1N nanowires 显示文摘Longhai Shen Xuefei Li Qiliang Cui 2010Appl Phys A2010,99,1:1
6Calculation of physica| optics integrals over NURBS surface using a delamlnatlng quad- rature method 显示文摘Li Jianbing Wang Xuesong Qu Longhai 2012IEEE Transactions on Antennas and Propaga- tion2012,60,5:1
7Nanofiber-based transparent film with controllable optical transparency adjustment function for versatile bionic applications显示文摘As a new favorite in the field of smart materials,smart windows,with visual stimulus sensing functions,have attracted extensive attention for their high transparency,sensitive response to environmental stimulus,and reversible changes in light transmittance.In this paper,the PVA-coPE nanofiber film,which was completely opaque like paper,was used as filling phase and reacted with water-soluble N-vinyl-2-pyrrolidone(NVP)by photopolymerization to produce a flexible transparency polyvinyl pyrrolidone/spraying PVA-co-PE nanofiber films(PVP/SPNFs)composite film.Among them,the small size effect of PVA-coPE nanofibers played a pivotal role in improving the film's transparency.Nevertheless,the PVP's reversible adsorption-desorption behavior of water molecules made its refractive index change dynamically and reversibly,which led to the visual transition of composite film from transparent to opaque just like that of electronic smart windows.Additionally,the reversible transition rate of film's transparency can be effectively regulated by the nanofiber stack structure.This new design of transparency visualization transforms composite film in response to humidity,innovates the electrically controlled smart windows on energy and realizes the effective utilization of natural resources such as water and humidity,which has a great application prospect in the field of flexible optoelectronic devices,intelligent buildings,and smart writing.Wen Wang Shuang Wang Chenxue Xiang Dan Xue Mufang Li Qiongzhen Liu Longhai Piao Dong Wang 2022Nano Research2022,15,1:1
8Novel multifunctional theranostic nanoagents based on Ho^(3+) for CT/MRI dual-modality imaging-guided photothermal therapy显示文摘Because of the intrinsic defects of traditional treatment of cancer,it is quite needed to construct novel theranostic nanoagents that can not only improve the accuracy of imaging diagnosis but also achieve highly efficient therapy of cancer.Herein,we fabricated polydopamine-functionalized ammonium holmium fluoride nanocomposites(AHF@PDA)for dual-modality bioimaging(magnetic resonance imaging(MRI)and computed tomography(CT))owing to the high X-ray attenuation feature and magnetic property of Ho^(3+).Moreover,PDA shell endows AHF@PDA with excellent photothermal conversion performances and robust biocompatibility,leading to good treatment effect in vitro and in vivo.All above positive results certify that AHF@PDA have good potential as theranostic agents for clinical application in the future.Dongzhi Xue Yang Liu Longhai Jin Yinghui Wang Fengzhi Cui Jianhua Liu Xiaoqing Li Songtao Zhang Ying Zhao Na Yin Rui Niu Daguang Wang Hongjie Zhang 2021Science China Chemistry2021,64,4:1
9Time-Modulated Transmissive Programmable Metasurface for Low Sidelobe Beam Scanning显示文摘Programmable metasurfaces have great potential for the implementation of low-complexity and low-cost phased arrays.Due to the difficulty of multiple-bit phase control,conventional programmable metasurfaces suffer a relatively high sidelobe level(SLL).In this manuscript,a time modulation strategy is introduced in the 1-bit transmissive programmable metasurface for reducing the SLLs of the generated patterns.After the periodic time modulation,harmonics are generated in each reconfigurable unit and the phase of the first-order harmonic can be dynamically controlled by applying different modulation sequences onto the corresponding unit.Through the high-speed modulation of the real-time periodic coding sequences on the metasurface by the programmable bias circuit,the equivalent phase shift accuracy to each metasurface unit can be improved to 6-bit and thus the SLLs of the metasurface could be reduced remarkably.The proposed time-modulated strategy is verified both numerically and experimentally with a transmissive programmable metasurface,which obtains an aperture efficiency over 34%and reduced SLLs of about-2o dB.The proposed design could offer a novel approach of a programmable metasurface framework for radar detection and secure communication applications.Xudong Baio Fuli Zhang Li Sun Anjie Cao Jin Zhang Chong He Longhai Liu Jianquan Yao Weiren Zhu 2022Research2022,,4:1
10TiO_2 nanotube arrays and TiO_2-nanotube-array based dye-sensitized solar cell显示文摘To substitute the non-regular nano-crystalline semiconductor for a novel kind of ordered microstructure is a very important aspect in the domain of dye-sensitized solar cell. One of the researching hot- spots is the highly-ordered TiO2 nanotube architecture. As a new type of titania nano-material, titania nanotube arrays have drawn extraordinary attention due to its distinctive morphology, notable photo-electrical and hydro-sensitive performance. At 100% sun the new kind of TiO2 nanotube arrays solar cell exhibits an overall conversion efficiency of 5.44%. This paper introduces the preparation methods of titania nanotube arrays, the existing problems and recent progress in titania nanotube arrays solar cell.LIU YanBiao ZHOU BaoXue XIONG BiTao BAI ding LI LongHai 2007Chinese Science Bulletin2007,52,12:1
11Broadband and tunable terahertz absorption via photogenerated carriers in undoped silicon显示文摘Terahertz absorbers based on doped silicon have achieved broadband and high-efficiency absorption due to their high concentration of carriers.However,their tunable performance is obviously insufficient.Here,we propose a new scheme for active terahertz absorption based on undoped silicon with a metamaterial antireflection layer,which realizes both strong absorption and ultrahigh modulation depth.Benefiting from the weak absorption and high transmission of undoped silicon for 1064-nm continuous wave,uniformly distributed carriers across the entire thickness of the absorber are excited,and efficient free carrier absorption of the terahertz wave is obtained.We use only a 500-μm thick absorber and achieve absorption greater than 90%in the range of 0.58 to 1.92 THz,with a peak value of 99%.More important,the absorber can be switched between two working states of nonabsorption and high-efficiency absorption by changing the pump power,which means the modulation depth reaches 100%.This simple and high-performance implementation scheme provides a new idea for the design of terahertz tunable absorbers.Jie Li Jitao Li Chenglong Zheng Longhai Liu Zhen Yue Hang Xu Xuanruo Hao Fuyu Li Tingting Tang Yating Zhang Jianquan Yao 2022Science China(Physics,Mechanics & Astronomy)2022,65,1:1
12Synthesis of poly(acrylate-styrene)/poly(acrylate-styrene) core/shell latex and TOPEM-DSC characterization显示文摘Min Duan Teng Qiu Chen Huang Guangyi Xu Longhai Guo Xiaoyu Li 2013Progress in Organic Coatings2013,,1:1
13Effect of Al_(2)O_(3) Nanoparticle on Cavitation Strengthening of Magnesium Alloys显示文摘In order to study the effect of Al_(2)O_(3) nanoparticles in the cavitation-based strengthening process of magnesium alloys,the impact of a micro-jet generated by bubble collapse has been considered.The strengthening mechanism is based on the transfer of the energy of cavitation due to bubble collapse to Al_(2)O_(3) particles,which then undergo collision with the surface of the sample.The hardness,surface morphology,element content and chemical state of the strengthened samples have been analyzed by microhardness tests,SEM(scanning electron microscopy)and XPS(X-ray photoelectron spectroscopy)techniques.The results show that:after 5 min of strengthening,nanoparticles can be found on the surface of the sample through SEM.Combined with XPS tests,the content of Al_(2)O_(3) in the sample can be significantly increased,indicating that Al_(2)O_(3) particles penetrate into the surface and increase its hardness by 29.1 HV.Lei Liu Chuanhui Huang Xinghua Lu Ping Yu Longhai Li Huafeng Guo 2021Fluid Dynamics & Materials Processing2021,17,2:1
14Effect of magnon LA phonon interaction on LA phonon excitation at finite temperature显示文摘CHENG Taimin LI Lin SHEN Longhai 2008Phys star sol(b)2008,245,4:1
15Preparation and characterization of graphitic carbon nitride through pyrolysis of melamine 显示文摘Li Xuefei ZhangJian Shen Longhai 2009Applied Physics A: Materials Science and Processing2009,94,2:1
16The formation mechanism of titania nanotube arrays in hydrofluoric acid electrolyte显示文摘Jing Bai Baoxue Zhou Longhai Li Yanbiao Liu Qing Zheng Jiahui Shao Xinyuan Zhu Weimin Cai Junsheng Liao Lexi Zou 2008Journal of Materials Science2008,,6:1
17The formation mechanism of titania nanotube arrays in hydrofluoric acid electrolyte显示文摘Jing Bai Baoxue Zhou Longhai Li Yanbiao Liu Qing Zheng Jiahui Shao Xinyuan Zhu Weimin Cai Junsheng Liao Lexi Zou 2008Journal of Materials Science2008,,6:1
18Secretomes are a potential source of molecular targets for cancer therapies and indicate that APOE is a candidate biomarker for lung adenocarcinoma metastasis显示文摘Zan Liu Yuan Gao Fengxia Hao Xiaomin Lou Xiuwei Zhang Yang Li Di Wu Ting Xiao Longhai Yang Qingchang Li Xueshan Qiu Enhua Wang 2014Molecular Biology Reports2014,,:1
19A CRISPR activation screen identifies genes that enhance SARS-CoV-2 infection显示文摘Dear Editor,Identifying the host factors that are utilized for virus infection and mapping their cell-type expression profile can help to understand the viral tissue/organ tropism and pathogenesis.Much effort has been devoted to the identification of SARS-CoV-2 infection-dependent host factors.CRISPR-based activation(Konermann et al.,2015).Fei Feng Yunkai Zhu Yanlong Ma Yuyan Wang Yin Yu Xinran Sun Yuanlin Song Zhugui Shao Xinxin Huang Ying Liao Jingyun Ma Yuping He Mingyuan Wang Longhai Tang Yaowei Huang Jincun Zhao Qiang Ding Youhua Xie Qiliang Cai Hui Xiao Chun Li Zhenghong Yuan Rong Zhang 2023Protein & Cell2023,14,1:0
20Supramolecular Assemblies of Three New Metronidazole Derivatives Constructed with Various Dihydroxy-benzoic Acids via Hydrogen Bonds显示文摘Metronidazole(MTZ)is an important antibiotic,which has been widely applied to cure protozoal and bacterial diseases for human beings or animals.Herein,three novel drug supramolecular crystals constructed by MTZ with 2.5-dihydroxy-benzoic acid(2.5-DHBA)(1),2.6-dihydroxy-benzoic acid(2.6-DHBA)(2)and 3,5-dihydroxy-benzoic acid(3.5-DHBA)(3),respectively,have been discovered.The hydrogen bonds of N-H…O(O-H…N).C-H…O and O-H…O play important roles in the 3D supramolecular framework formation for crystals 1-3.Interestingly.due to the vary locations of the substituent groups,the two-dimensional layers in crystals 1 or 2 are constructed via intermolecular hydrogen bonds between MTZ and 2,5-DHBA or 2.6-DHBA,while in crystal 3 water molecules play a significant role except the intermolecular hydrogen bonds between MTZ and 3,5-DHBA.In addition,five synthons of I R^22(8),ⅡR3(9)in crystal 1,ⅢR1(4),ⅣR2(8)in crystal 2 andⅤR2(7)in crystal 3 formed through various hydrogen bonds are founded in this work.Systematic studies of syntheses,crystal structures and thermal analysis are reported.QU Huiqi PAN Longhai SUN Yuexin WANG Lei LI Yanyan ZHANG Mingjuan ZHANG Zhaoxiang LIN Haifeng 2020Chemical Research in Chinese Universities2020,36,6:0
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