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Effects of cross-Kerr coupling on transmission spectrum of double-cavity optomechanical system

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Chinese Physics B 2024年第6期33卷 390-396页

作者：陈立滕秦立国田立君黄接辉周南润龚尚庆 School of Mathematics Physics and StatisticsShanghai University of Engineering ScienceShanghai 201620China department of Physics Shanghai UniversityShanghai 200444China School of Electrical engineering Shanghai University of Engineering ScienceShanghai 201620China School of Physics East China University of Science and TechnologyShanghai 200237China

We theoretically study the transmission spectrum of the cavity field in a double-cavity optomechanical system with cross-Kerr(CK) effect. The system consists of two tunneling coupling optomechanical cavities with a mechanical resonator as a coupling interface. By doping CK medium into the mechanical resonator, CK couplings between the cavity fields and the mechanical resonator are introduced. We investigate the effects of CK coupling strength on the transmission spectrum of the cavity field, including the transmission rate, nonreciprocity and four-wave mixing(FWM). We find that the transmission spectrum of the probe field can show two obvious transparent windows, which can be widened by increasing the CK coupling strength. For the transmission between the two cavity fields, the perfect nonreciprocity and reciprocity are present and modulated by CK coupling and phase difference between two effective optomechanical couplings. In addition, the effects of the optomechanical and CK couplings on FWM show that the single peak of FWM is split into three symmetrical peaks due to the introduction of the CK effect.

关键词： cross-Kerr transmission rate nonreciprocity four-wave mixing

Green Synthesis of Iron(Ⅱ,Ⅲ)-polyphenol nanoparticles and Their Adsorption of Malachite Green

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 1025-1030页

作者：胡玉 zhou Fan ZHANG nan PAN Xiaobin LI Shiying ZHANG Dong LI Li 张玲帆 department of Chemistry and Environmental engineering Hanjiang Normal UniversityShiyan 442000China Shiyan Hydrological and Water Resources Survey Bureau of Hubei Province Shiyan 442000China School of Chemistry and Molecular engineering East China University of Science and TechnologyShanghai 200237China

Three kinds of iron nanoparticles(FeNPs)were prepared via green route based on pomegranate(PG),green tea(GT),and mulberry(ML)extracts under ambient *** obtained materials were characterized by scanning electron microscopy(SEM),transmission electronic microscopy(TEM),X-ray energy-dispersive spectrometer(EDS),X-ray diffraction(XRD),fourier transform infrared spectroscopy(FTIR),and X-ray photoelectron spectroscopy(XPS)*** experimental results show that FeNPs were in the form of amorphous iron(Ⅱ,Ⅲ)-polyphenol complex with different dispersity and ***-Fe has the smallest size range of 2.-35 nm,PG-Fe has a moderate size-distribution of 30-4. nm,while ML-Fe formed a tuberous net-type with a sheeting ***-Fe displays the highest removal efficiency of 90.2.in 2. min towards cationic dye of malachite green(16.6%by ML-Fe and 69.3%by GT-Fe),which is attributed to its highest polyphenol content,lowest zeta potential,as well as the most Fe^(2.)on the surface of *** removal mechanism was mainly induced by electrostatic adsorption based on pH and zeta potential tests.

关键词： iron nanoparticles pomegranate green tea mulberry adsorption

A Linked List Encryption Scheme for Image Steganography without Embedding

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Computer Modeling in engineering & Sciences 2024年第10期141卷 331-352页

作者： Pengbiao Zhao Qi Zhong Jingxue Chen Xiaopei Wang Zhen qin Erqiang zhou Network and Data Security Key Laboratory of Sichuan Province University of Electronic Science and Technology of ChinaChengdu610054China Faculty of Data Science City University of MacaoMacao999078China department of Computer Science and engineering University of CaliforniaRiversideCA 92521USA

Information steganography has received more and more attention from scholars nowadays,especially in the area of image steganography,which uses image content to transmit information and makes the existence of secret information *** enhance concealment and security,the Steganography without Embedding(SWE)method has proven effective in avoiding image distortion resulting from cover *** this paper,a novel encrypted communication scheme for image SWE is *** reconstructs the image into a multi-linked list structure consisting of numerous nodes,where each pixel is transformed into a single node with data and pointer *** employing a special addressing algorithm,the optimal linked list corresponding to the secret information can be *** receiver can restore the secretmessage fromthe received image using only the list header position *** scheme is based on the concept of coverless steganography,eliminating the need for any modifications to the cover *** boasts high concealment and security,along with a complete message restoration rate,making it resistant to ***,this paper proposes linked-list construction schemeswithin theproposedframework,which caneffectively resist a variety of attacks,includingnoise attacks and image compression,demonstrating a certain degree of *** validate the proposed framework,practical tests and comparisons are conducted using multiple *** results affirm the framework’s commendable performance in terms of message reduction rate,hidden writing capacity,and robustness against diverse attacks.

关键词： Steganography encryption steganography without embedding coverless steganography

High-performance and wavelength-transplantable on-chip Fourier transform spectrometer using MEMS in-plane reconfiguration

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Photonics Research 2024年第8期12卷 1730-1740页

作者： HENG CHEN HUI ZHANG JING zhou CHEN MA QIAN HUANG HANXING WANG qinGHUA REN {2. WANG CHENGKUO LEE YIMING MA School of Microelectronics Shanghai UniversityShanghai 201800China Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology Shanghai UniversityShanghai 201800China department of Electrical and electronic {2. The Hong Kong Polytechnic UniversityHong Kong 999077China department of Electrical and Computer engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

On-chip spectrometers with high compactness and portability enable new applications in scientific research and industrial *** transform(FT)spectrometers have the potential to realize a high signal-to-noise *** we propose and demonstrate a generalized design for high-performance on-chip FT *** spectrometer is based on the dynamic in-plane reconfiguration of a waveguide coupler enabled by an integrated comb-drive actuator *** electrostatic actuation intrinsically features ultra-low power *** coupling gap is crucial to the spectral *** in-plane reconfiguration surmounts the lithography accuracy limitation of the coupling gap,boosting the resolution to 0.2.nm for dual spectral spikes over a large bandwidth of 100 nm(1.5–1.6μm)within a compact footprint of 75μm×1000μ***,the in-plane tuning range can be large enough for arbitrary wavelengths to ensure the effectiveness of spectrum *** a result,the proposed spectrometer can be easily transplanted to other operation bands by simply scaling the structural *** a proof-of-concept,a mid-infrared spectrometer is further demonstrated with a dual-spike reconstruction resolution of 1.5 nm and a bandwidth of 300 nm(4.4.3μm).

关键词： waveguide tuning lithography

High-quality ghost imaging based on undersampled natural-order Hadamard source

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Chinese Physics B 2024年第9期33卷 404-411页

作者： Kang Liu Cheng zhou Jipeng Huang Hongwu qin Xuan Liu Xinwei Li Lijun Song School of electronic Information engineering Changchun UniversityChangchun 130022China School of Physics Northeast Normal UniversityChangchun 130024China College of electronic and Information engineering Changchun University of Science and TechnologyChangchun 130022China Jilin engineering Laboratory for Quantum Information Technology Jilin Engineering Normal UniversityChangchun 130052China Changchun Institute of Technology Changchun 130012China

Improving the speed of ghost imaging is one of the main ways to leverage its advantages in sensitivity and imperfect spectral regions for practical *** of the proportional relationship between image resolution and measurement time,when the image pixels are large,the measurement time increases,making it difficult to achieve real-time ***,a high-quality ghost imaging method based on undersampled natural-order Hadamard is *** method uses the characteristics of the Hadamard matrix under undersampling conditions where image information can be fully obtained but overlaps,as well as deep learning to extract aliasing information from the overlapping results to obtain the true original image *** conducted numerical simulations and experimental tests on binary and grayscale objects under undersampling conditions to demonstrate the effectiveness and scalability of this *** method can significantly reduce the number of measurements required to obtain high-quality image information and advance application promotion.

关键词： ghost imaging natural-order Hadamard deep learning

Quantifying the contribution of activity patterns to PM_(2.5)exposure inequity between urban and rural residents by a novel method

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Building Simulation 2024年第8期17卷 1323-1333页

作者： Wei Du Zhanpeng Cui Jinze Wang Yuqiong Wang Yungui Li Xiaoan Li Yan zhou Tao Jiang Kang Mao Xianbiao Lin Jianwu Shi Dengzhou Gao Yiming {2. Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control Faculty of Environmental Science&EngineeringKunming University of Science&TechnologyKunming 650500China Laboratory of Earth Surface Processes College of Urban and Environmental SciencesPeking UniversityBeijing 100871China department of Environmental engineering Southwest University of Science and TechnologyMianyang 621010China NHC Key Laboratory of Nuclear Technology Medical Transformation Mianyang Central HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaMianyang 621000China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationOcean University of ChinaQingdao266100China Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education School of Geographical SciencesFujian NormalUniversityFuzhou350117China School of Energy and Environment City University of Hong KongHong KongChina

PM_(2.5)pollution variations in different microenvironments would result in PM_(2.5)exposure inequity between rural and urban *** this study,the real-time PM_(2.5)exposure of urban and rural residents in china was examined based on portable PM_(2.5)sensors together with activity patterns derived from questionnaire surveys,with a focus on students and senior citizens who are sensitive to air *** results showed that PM_(2.5)exposure varied significantly among different resident groups,with higher PM_(2.5)exposure of rural residents than those of urban ***_(2.5)exposure peaks mostly occurred during(Accompanied)cooking activities owing to strong *** and resting were the main activities that affected PM_(2.5)exposures of different resident groups,accounting for 60.7%-94.5%of total daily ***,the long duration of sleeping makes it the predominant activity contributing to PM 2. exposure *** is necessary to obtain point-to-point respiratory volume(respiratory rate)data when measuring real-time PM_(2.5)exposure data and incorporate respiratory volume(respiratory rate)into the analysis of PM_(2.5)*** the first time,this study quantified the PM_(2.5)exposure inequality based on a novel method and can provide useful information for further studies on the exposure inequity.

关键词： PM_(2.5)exposure environmental inequity activity pattern urban and rural difference

Two-step unsymmetrical quantum key distribution protocol using GHZ triplet states

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The Journal of china Universities of Posts and Telecommunications 2009年第3期16卷 114-121页

作者： HUANG Peng LIU Ye zhou nan-{2. ZENG Gui-hua department of electronic Information {2. Nanchang University Nanchang 330031 China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200240 China

The security, efficiency, transmission distance and error rate are important parameters of a quantum key distribution scheme. In this article, the former two parameters are focused on. To reach high efficiency, an unsymmetrical quantum key distribution scheme that employs Greenberger-Horne-Zeilinger （GHZ） triplet states and dense coding mechanism is proposed, in which a GHZ triplet state can be used to share two bits of classical information. The proposed scheme can be employed in a noisy or lossy quantum channel. In addition, a general approach to security analysis against general individual attacks is presented.

关键词： two-step tmsymmetrical quantum key distribution GHZ triplet states

New semi-quantum key agreement protocol based on high-dimensional single-particle states

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Chinese Physics B 2020年第11期29卷 189-196页

作者： Huan-Huan Li Li-Hua Gong nan-run {2. department of electronic Information {2. Nanchang UniversityNanchang 330031China

A new efficient two-party semi-quantum key agreement protocol is proposed with high-dimensional single-particle *** from the previous semi-quantum key agreement protocols based on the two-level quantum system,the propounded protocol makes use of the advantage of the high-dimensional quantum system,which possesses higher efficiency and better robustness against ***,the protocol allows the classical participant to encode the secret key with qudit shifting operations without involving any quantum measurement *** designed semi-quantum key agreement protocol could resist both participant attacks and outsider ***,the conjoint analysis of security and efficiency provides an appropriate choice for reference on the dimension of single-particle states and the number of decoy states.

关键词： semi-quantum key agreement protocol high-dimensional quantum state quantum cryptography quantum communication

Electrocatalytic activity of LaSr_3Fe_3O_(10) and LaSr_3Fe_3O_(10)-GO towards oxygen reduction reaction in alkaline medium

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Journal of Rare Earths 2019年第3期37卷 282-286页

作者： qin Li Xie zhou Zhiqiang Wei Guoping Du Guoguang Zhang {2. Chen School of Materials Science and engineering Nanchang University School of Materials Science and engineering Nanchang Hangkong University

Oxygen reduction reaction(ORR) plays a critical role in many energy conversion and storage ***, a comparative study of the electrocatalytic activity for ORR in 0.1 mol/L KOH solution was conducted using layered perovskite-like LaSr_3 Fe_3 O_(10) and LaSr3 Fe_3 O_(10)-graphene oxide(GO) composite as electrodes. Linear sweep voltammetry(LSV) results show that the LaSr3 Fe_3 O_(10)-GO hybrid exhibits higher current density, a more positive onset potential(-0.15 V vs. Hg/HgO) in comparison with LaSr_3 Fe_3 O_(10).The value of the overall transferred electrons for both catalysts implies a dominant two electron process for ORR. Both catalysts under alkalic conditions exhibit a two-step Tafel slope, suggesting a change in the reaction mechanism for ORR. The composite electrode exhibits a higher ORR current density, but inferior durability performances in relative to the LaSr_3 Fe_3 O_(10) electrode.

关键词： ORR Layered perovskite Graphene oxide Rare earths