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Measurement-device-independent one-step quantum secure direct communication

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Chinese Physics B 2022年第12期31卷 57-65页

作者： jia-wei Ying Lan Zhou wei Zhong Yu-Bo Sheng College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China

The one-step quantum secure direct communication(QSDC)(***.67,367(2022))can effectively simplify QSDC’s operation and reduce message *** enhancing its security under practical experimental condition,we propose two measurement-device-independent(MDI)one-step QSDC protocols,which can resist all possible attacks from imperfect measurement *** both protocols,the communication parties prepare identical polarization-spatial-mode two-photon hyperentangled states and construct the hyperentanglement channel by hyperentanglement *** first MDI one-step QSDC protocol adopts the nonlinear-optical complete hyperentanglement Bell state measurement(HBSM)to construct the hyperentanglement channel,while the second protocol adopts the linear-optical partial ***,the parties encode the photons in the polarization degree of freedom and send them to the third party for the hyperentanglementassisted complete polarization Bell state *** protocols are unconditionally secure in *** simulation results show the MDI one-step QSDC protocol with complete HBSM attains the maximal communication distance of about354 *** MDI one-step QSDC protocols may have potential applications in the future quantum secure communication field.

关键词： measurement-device-independent one-step quantum secure direct communication hyperentanglement Bell state measurement hyperentanglement-assisted complete polarization Bell state measurement

Application of Seismic Interferometric Migration for Shallow Seismic High Precision Data Processing: A Case Study in the Shenhu Area

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Journal of Ocean University of China 2018年第1期17卷 46-52页

作者： wei jia LIU Huaishan XING Lei DU Dong Key Laboratory of Submarine Geosciences and Exploration Techniques Ministry of Education Ocean University of China Tianjin Center ChinaGeological Survey

The stability of submarine geological structures has a crucial influence on the construction of offshore engineering projects and the exploitation of seabed resources. Marine geologists should possess a detailed understanding of common submarine geological hazards. Current marine seismic exploration methods are based on the most effective detection technologies. Therefore, current research focuses on improving the resolution and precision of shallow stratum structure detection methods. In this article, the feasibility of shallow seismic structure imaging is assessed by building a complex model, and differences between the seismic interferometry imaging method and the traditional imaging method are discussed. The imaging effect of the model is better for shallow layers than for deep layers because coherent noise produced by this method can result in an unsatisfactory imaging effect for deep layers. The seismic interference method has certain advantages for geological structural imaging of shallow submarine strata, which indicates continuous horizontal events, a high resolution, a clear fault, and an obvious structure boundary. The effects of the actual data applied to the Shenhu area can fully illustrate the advantages of the method. Thus, this method has the potential to provide new insights for shallow submarine strata imaging in the area.

关键词： seismic interferometric migration shallow strata Shenhu area migration imaging

Advances of biomarkers in nasopharyngeal carcinoma’s early detection

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Science Bulletin 2024年第2期69卷 141-145页

作者： Xiao-Hui Zheng Allan Hildesheim wei-Hua jia State Key Laboratory of Oncology in South China Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and TherapyGuangdong Provincial Clinical Research Center for CancerSun Yat-sen University Cancer CenterGuangzhou 510060China Costa Rican Agency for Biomedical Investigation INCIENSA FoundationSan Jose 10108Costa Rica

Nasopharyngeal carcinoma(NPC),a highly invasive and metastatic cancer,is widely prevalent in South China,Southeast Asia,and North *** patients with stages I and II are often ***,NPC patients are usually diagnosed with advanced-stage(stages III and IV)at their first *** of NPC at early stage is the key to improve the survival of ***-Barr virus(EBV)plays an essential role in NPC occurrence in endemic ***-based biomarkers,including EBV antibody in serum and EBV DNA in plasma,have been specifically proposed for NPC early ***,we summarize recent advances in biomarkers for the early detection of NPC.

关键词： patients nasopharyngeal Nasopharyngeal

Variation in spectral characteristics of dissolved organic matter derived from rape straw of plants grown in Se-amended soil

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Journal of Integrative Agriculture 2020年第7期19卷 1876-1884页

作者： jia wei ZHAO Xiao-hu ZHAO Yuan-yuan XU jia-yang MING jia-jia CAI Miao-miao HU Cheng-xiao College of Resources and Environment/Research Center of Trace Elements Huazhong Agricultural University/Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River)Ministry of Agriculture and Rural AffairsWuhan 430070P.R.China Hubei Provincial Engineering Laboratory for New-type Ferilizer Wuhan 430070P.R.China

Straw return is an effective management practice. It not only utilizes agricultural waste but also introduces dissolved organic matter(DOM) into the soil. Selenium(Se) is an essential trace element in the human diet and contributes to the popularity of Se-enriched agricultural products in the Chinese market. Moreover, there are still some Se-enriched agricultural products that have yet to be utilized. This study investigated whether Se addition in soil caused component changes in the DOM extracted from rape straw. DOM extracted from rape straw grown in soil with four Se levels(0, 0.1, 0.5 and 1.0 mg Se kg-1 soil) was characterized by UV-Visible spectroscopy, fluorescence spectroscopy and FTIR spectroscopy. The UVvisible spectra revealed that 0.1 mg Se kg-1 soil reduced the molecular weight of DOM and caused the presence of more irreplaceable aromatic structures in the substituent groups of the DOM, while 0.5 and 1.0 mg Se kg-1 soil only reduced the DOM molecular weight. Fluorescence spectroscopy indicated that Se improved the humification degree but reduced the aromaticity of DOM. FTIR spectra proved that Se altered the contents of carboxylic acids, amino acids, alcohols and aromatic heterocycles in DOM, which were maximized in the 0.5 and 1.0 mg Se kg-1 treatment groups. We concluded that Se application could change the composition of DOM extracted from rape straw, potentially impacting the nutrient bioavailability in soil. This study provides basic data on Se-enriched rape straw utilization for eco-agriculture.

关键词： composition dissolved organic matter rape straw selenium spectroscopy

One-step accurate synthesis of shell controllable CoFe2O4 hollow microspheres as high-performance electrode materials in supercapacitor

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Nano Research 2016年第7期9卷 2026-2033页

作者： Zhuo Wang wei jia Menglei jiang Chen Chen Yadong Li Department of Chemistry & Collaborative Innovation Center for Nanomaterial Science and Engineering Tsinghua University Beijing 100084 China Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China

Multi-shelled CoFe2O4 hollow microspheres with a tunable number of layers （1-4） were successfully synthesized via a facile one-step method using cyclodextrin as a template, followed by calcination. The structural features, including the shell number and shell porosity, were controlled by adjusting the synthesis parameters to produce hollow spheres with excellent capacity and durability. This is a straightforward and general strategy for fabricating metal oxide or bimetallic metal oxide hollow microspheres with a tunable number of shells.

关键词： hollow spheres multi-shelled CoFe2O4 supercapacitor

Multi-site observation of large-scale eddies in the surface layer of the Loess Plateau

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Science China Earth Sciences 2023年第4期66卷 871-881页

作者： Jinbei CHEN Xiaowen CHEN wei jia Ye YU Suping ZHAO Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Middle Atmosphere and Global Environment Observation(LAGEO) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Mechanical Engineering Department Pennsylvania State UniversityState College 16802USA

This article aims to build a theory of atmospheric boundary layer turbulence under complex conditions. To achieve this goal, we constructed a multi-site observation and analysis method of atmospheric turbulence based on related *** method first requires verification for the ergodicity of the full-scale observation of surface-layer turbulence, which proves that eddies within a scale of 60 min during a four-site observation can easily meet ergodicity. Meanwhile, by applying the second-order structure function for the horizontal wind speed turbulence of a single site and upstream and downstream points, we verified the ergodicity of the turbulence observation. Comparing the turbulence spectrum to the second-order structure function for the horizontal wind speed from the four-site observation, a relatively high accordance was observed, proving the reasonability of the multi-site observation. Moreover, compared to the single-site observation, the four-site observation can improve the estimation accuracy of the surface-layer turbulence spectrum and vertical turbulent flux. As a result, we can describe the threedimensional structure of turbulence more accurately and comprehensively by combining analytical data from single-site and four-site observations. In summary, the multi-site turbulence observation method shows that the horizontal and vertical wind turbulence of the Baimiao plateau has a typical structure of a turbulence spectrum with clear spectral gaps. The result is in accordance with the scale of the turbulence spectral gaps obtained from the 6 h data. The horizontal wind speed is under the influence of the terrain, so its spectrum of large-scale eddies has higher fluctuations, but its spectral gaps can still be clearly distinguished. Although the spectral gaps of the temperature spectrum are not distinguishable, they still have the same scale as the spectral gap of the vertical and horizontal turbulence spectrum. Moreover, the temperature spectrum poss

关键词： Larger-scale eddy Complex condition Ergodicity of turbulence observation Structure function Turbulence spectrum

Fluorite Ce_(0.8)Sm_(0.2)O_(2-δ) porous layer coating to enhance the oxygen permeation behavior of a BaCo_(0.7)Fe_(0.2)Nb_(0.1)O_(3-δ) mixed conductor

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International Journal of Minerals,Metallurgy and Materials 2016年第6期23卷 698-703页

作者： Tai-he Wang wei-jia Song Rong Li Qiang Zhen Nano-Science and Technology Research Center Shanghai University Materials Science and Engineering College Shanghai University

Fluorite Ce0.8Sm0.2O2-δ（SDC） nanopowder with a crystallite size of 15 nm was synthesized by a co-precipitation method. An SDC porous layer was coated onto a BaCo0.7Fe0.2Nb0.1O3-δ（BCFN） mixed conductor to improve its oxygen transport behavior. The results show that the SDC-coated BCFN membrane exhibits a remarkably higher oxygen permeation flux（JO2） than the uncoated BCFN in the partial oxidation of coke oven gas（COG）. The maximum JO2 value of the SDC-coated BCFN is 18.28 mL ·min^-1·cm^-2 under a COG/air flux of 177 mL ·min^-1/353 mL ·min^-1 at 875℃ when the thickness of the BCFN membrane is 1 mm; this JO2 value is 23% higher than that of the uncoated BCFN membrane. This enhancement is likely because of the higher oxygen ionic conductivity of SDC, which supplies oxygen vacancies and accelerates oxygen exchange on the membrane/coating layer/gas three-phase boundary.

关键词： chemical stability surface coating oxygen permeable membrane coke oven gas

Preparation of POE/PS Blends with Fine Particle Sizes by Diffusion and Subsequent Polymerization of Styrene in POE Pellets

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Chinese Journal of Polymer Science 2017年第8期35卷 939-949页

作者： wei-jia wang cheng-huan huang 郭朝霞于建 Key Laboratory of Advanced Materials (Ministry of Education) Department of Chemical Engineering Tsinghua University Beo'ing 100084 China

Ethylene-α-octene copolymer （POE）/polystyrene （PS） blend pellets with fine particle sizes were prepared by diffusion and subsequent polymerization of styrene in POE pellets through a one-pot procedure. The effects of the amounts of styrene and BPO on PS content, monomer efficiency and monomer conversion were investigated. The blend pellets were characterized by Micro-FTIR and FESEM, showing homogeneous diametrical distributions of PS and particle size. After melt-processing into rods, the average particle sizes are almost doubled, but still in submicron scale. Compared to neat POE rods, the blend rods with PS content higher than 15% exhibit improved tensile modulus and tensile strength without significantly losing ductility, being attributed to the small sizes, complex nature of particles and the existence of POE-g-PS copolymer that result in good interfacial adhesion. POE/PS pellets were compared with the previously reported PP/PS pellets, and the differences between the two systems are attributed to the different morphology of the two matrices： POE is completely amorphous at the diffusion and polymerization temperature, while iPP is semicrystalline. Without efficient impediment of the crystal lamellae in POE pellets, styrene diffuses easily in POE pellets.

关键词： Blends Mechanical properties Nanostructured polymers Polystyrene

Multiple parametric Marcinkiewicz integrals with mixed homogeneity along surfaces

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Applied Mathematics(A Journal of Chinese Universities) 2023年第3期38卷 413-428页

作者： SHEN jia-wei HE Shao-yong CHEN Jie-cheng Department of Mathematics Zhejiang Normal UniversityJinhua 321004China Department of Mathematics Huzhou UniversityHuzhou 313000China.

In this paper, the multiple parametric Marcinkiewicz integral operators with mixed homogeneity along surfaces are studied. The Lp-mapping properties for such operators are obtained under the rather weakened size conditions on the integral kernels both on the unit sphere and in the radial direction. The main results essentially improve and extend certain previous results.

关键词： parametric Marcinkiewicz integrals rough kernels mixed homogeneity product spaces