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Metamaterial terahertz device with temperature regulation function that can achieve perfect absorption and complete reflection conversion of ultrawideband

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Communications in Theoretical Physics 2024年第7期76卷 123-133页

作者： Hao Sun Zao yi Can Ma Shubo Cheng Bin Tang Qingdong Zeng Sohail Ahmad School of Mathematics and Science Joint Laboratory for Extreme Conditions Matter PropertiesState Key Laboratory of Environment-Friendly Energy MaterialsTianfu Institute of Research and InnovationSouthwest University of Science and TechnologyMianyang 621010China Department of Oncology Sichuan Science City HospitalMianyangSichuan Province621000China School of Chemistry and Chemical Engineering Jishou UniversityJishou 416000China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhouHubei 434023China School of Microelectronics and Control Engineering Changzhou UniversityChangzhou 213164China School of Physics and Electronic Information Engineering Hubei Engineering UniversityXiaogan 432000China Institute of Physics Bahauddin Zakariya UniversityMultan 66000Pakistan

The field of terahertz devices is important in terahertz ***,most of the current devices have limited functionality and poor *** improve device performance and achieve multifunctionality,we designed a terahertz device based on a combination of VO_(2)and *** device can be tuned using the phase-transition characteristics of VO_(2),which is included in the triple-layer structure of the device,along with SiO_(2)and *** terahertz device exhibits various advantageous features,including broadband coverage,high absorption capability,dynamic tunability,simple structural design,polarization insensitivity,and incidentangle *** simulation results showed that by controlling the temperature,the terahertz device achieved a thermal modulation range of spectral absorption from 0 to *** 313 K,the device exhibited complete reflection of terahertz *** the temperature increased,the absorption rate also *** the temperature reached 353 K,the device absorption rate exceeded 97.7%in the range of 5-8.55 *** study used the effective medium theory to elucidate the correlation between conductivity and temperature during the phase transition of VO_(2).Simultaneously,the variation in device performance was further elucidated by analyzing and depicting the intensity distribution of the electric field on the device surface at different ***,the impact of various structural parameters on device performance was examined,offering valuable insights and suggestions for selecting suitable parameter values in real-world *** characteristics render the device highly promising for applications in stealth technology,energy harvesting,modulation,and other related fields,thus showcasing its significant potential.

关键词： terahertz perfect absorption complete reflection temperature regulation ultrawideband smart device

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All‑Covalent Organic Framework Nanofilms Assembled Lithium‑Ion Capacitor to Solve the Imbalanced Charge Storage Kinetics

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Nano-Micro Letters 2024年第6期16卷 246-260页

作者： Xiaoyang Xu Jia zhang Zihao zhang Guandan Lu Wei Cao Ning Wang Yunmeng Xia Qingliang Feng Shanlin Qiao College of Chemistry and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018People’s Republic of China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China Hebei Engineering Research Center of Organic Solid Photoelectric Materials for Electronic Information Shijiazhuang 050018People’s Republic of China

Free-standing covalent organic framework(COFs)nanofilms exhibit a remarkable ability to rapidly intercalate/de-intercalate Li^(+) in lithium-ion batteries,while simultaneously exposing affluent active sites in *** development of these nanofilms offers a promising solution to address the persistent challenge of imbalanced charge storage kinetics between battery-type anode and capacitor-type cathode in lithium-ion capacitors(LICs).Herein,for the first time,custom-made COFBTMB-TP and COFTAPB-BPY nanofilms are synthesized as the anode and cathode,respectively,for an all-COF nanofilm-structured *** COFBTMB-TP nanofilm with strong electronegative–CF3 groups enables tuning the partial electron cloud density for Li^(+) migration to ensure the rapid anode kinetic *** thickness-regulated cathodic COFTAPB-BPY nanofilm can fit the anodic COF nanofilm in the *** to the aligned 1D channel,2D aromatic skeleton and accessible active sites of COF nanofilms,the whole COFTAPB-BPY//COFBTMB-TP LIC demonstrates a high energy density of 318 mWh cm^(−3) at a high-power density of 6 W cm^(−3),excellent rate capability,good cycle stability with the capacity retention rate of 77%after *** COFTAPB-BPY//COFBTMB-TP LIC represents a new benchmark for currently reported film-type LICs and even film-type *** being comprehensively explored via ex situ XPS,7Li solid-state NMR analyses,and DFT calculation,it is found that the COFBTMB-TP nanofilm facilitates the reversible conversion of semi-ionic to ionic C–F bonds during lithium ***-TP exhibits a strong interaction with Li^(+) due to the C–F,C=O,and C–N bonds,facilitating Li^(+) desolation and absorption from the *** work addresses the challenge of imbalanced charge storage kinetics and capacity between the anode and cathode and also pave the way for future miniaturized and wearable LIC devices.

关键词： Covalent organic frameworks Lithium-ion capacitor Charge storage kinetic

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A Review of Anode Materials for Dual‑Ion Batteries

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Nano-Micro Letters 2024年第11期16卷 618-674页

作者： Hongzheng Wu Shenghao Luo Hubing Wang Li Li Yaobing Fang Fan zhang Xuenong Gao Zhengguo zhang Wenhui Yuan School of Chemistry and Chemical Engineering Guangdong ProvinceSouth China University of TechnologyGuangzhou 510641People’s Republic of China Zhuhai Modern Industrial Innovation Research Institute of South China University of Technology Zhuhai 519125Guangdong ProvincePeople’s Republic of China School of Environment and Energy Guangdong ProvinceSouth China University of TechnologyGuangzhou 510641People’s Republic of China

Distinct from"rockingchair"lithium-ion batteries(LIBs),the unique anionic intercalation chemistry on the cathode side of dual-ion batteries(DIBs)endows them with intrinsic advantages of low cost,high voltage,and ecofriendly,which is attracting widespread attention,and is expected to achieve the next generation of large-scale energy storage *** the electrochemical reactions on the anode side of DIBs are similar to that of LIBs,in fact,to match the rapid insertion kinetics of anions on the cathode side and consider the compatibility with electrolyte system which also serves as an active material,the anode materials play a very important role,and there is an urgent demand for rational structural design and performance optimization.A review and summarization of previous studies will facilitate the exploration and optimization of DIBs in the ***,we summarize the development process and working mechanism of DIBs and exhaustively categorize the latest research of DIBs anode materials and their applications in different battery ***,the structural design,reaction mechanism and electrochemical performance of anode materials are briefly ***,the fundamental challenges,potential strategies and perspectives are also put *** is hoped that this review could shed some light for researchers to explore more superior anode materials and advanced systems to further promote the development of DIBs.

关键词： Dual-ion batteries Anode Carbonaceous materials Metallic materials Organic materials Optimization strategies

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Propagation and Dispersion Characteristics of Scholte Wave in VTI Media with the Presence of Irregular Seabed

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Journal of Earth Science 2024年第2期35卷 722-725页

作者： Xiaobo Liu Yun Wang Jianlei zhang Haifeng Chen Hua zhang School of Ocean Sciences China University of GeosciencesBeijing 100083China Key Laboratory of Polar Geology and Marine Mineral Resources China University of GeosciencesBeijing 100083China School of Geophysics and Information Technology China University of GeosciencesBeijing 100083China Research&Development Center BGP IncCNPCZhuozhou 072751China National Engineering Research Center for Oil and Gas Exploration Computer Software Beijing 100080China

INTRODUCTION Surface waves propagating along the seafloor are general ly called Scholte waves,and were first discovered and studied in the early 1950s(Kugler et al.,2005;Buchen and Ben-Hador,1996).Scholte waves exhibit a dispersion phenomenon,which implies that their velocity varies with ***-frequency Scholte waves can propagate over long distances on the seabed with little attenuation(Bohlen et al.,2004).The particle mo tion of Scholte waves in a solid medium changes from a retro grade to a prograde ellipse(Klein et al.,2005;McMechan and Yedlin,1981).

关键词： seabed Dispersion implies

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Mechanistic insights into the synergetic remediation and amendment effects of zeolite/biochar composite on heavy metal-polluted red soil

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 105-114页

作者： jing Li Dazhong Yang Wensong Zou Xuezhen Feng Ranhao Wang Renji Zheng Siyuan Luo Zheting Chu Hong Chen State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution ControlSchool of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Red soil,the most critical soil resource in tropical/subtropical regions worldwide,faces tremendous threats,including nutrient deficiency,acidification,and heavy metal *** is a great demand for multifunctional eco-materials capable of modifying this ***,we used widely distributed soil and biomass to develop a zeolite/biochar composite for synergistic red soil remediation and *** the composite material,the Pb2+and Cd2+remediation efficiencies reached 92.8%and 92.9%,respectively,in stems under optimal ***,the acidity and nutrient deficiency conditions of red soil significantly *** atomic-scale interaction mechanism during the remediation and amendment process was elucidated with complementary characterization methods,which revealed that in the zeolite/biochar composite material,zeolite contributes to longterm heavy metal remediation ***,biochar is responsible for soil quality amendment and short-term heavy metal ***,for the first time,single-atom heavy metal ions were observed on biochar during the remediation process,indicating the broad distribution of single atoms in the natural environment.

关键词： Red soil Heavy metal pollution Zeolite/biochar composite Soil remediation Soil amendment

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Global well-posedness for 2D inhomogeneous asymmetric fluids with large initial data

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Science China Mathematics 2024年第3期67卷 527-556页

作者： Chenyin Qian Beibei He Ting zhang School of Mathematical Sciences Zhejiang Normal UniversityJinhua 321004China School of Mathematical Sciences Zhejiang UniversityHangzhou 310058China

In this paper, by using time-weighted global estimates and the Lagrangian approach, we first investigate the global existence and uniqueness of the solution for the 2D inhomogeneous incompressible asymmetric fluids wi... 详细信息

关键词： inhomogeneous asymmetric fluids Littlewood-Paley theory Besov spaces global well-posedness

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Mechanisms underlying the role of endoplasmic reticulum stress in the placental injury and fetal growth restriction in an ovine gestation model

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Journal of Animal Science and Biotechnology 2024年第1期15卷 201-217页

作者： Hao zhang Xia Zha yi Zheng Xiaoyun Liu Mabrouk Elsabagh Hongrong Wang Honghua Jiang Mengzhi Wang Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition College of Animal Science and TechnologyYangzhou UniversityYangzhou 225009P.R.China Joint International Research Laboratory of Agriculture and Agri‑Product Safety Ministry of Education of ChinaYangzhou UniversityYangzhou 225009P.R.China Department of Animal Production and Technology Faculty of Agricultural Sciences and TechnologiesNiğde Omer Halisdemir UniversityNigde 51240Turkey Department of Nutrition and Clinical Nutrition Faculty of Veterinary MedicineKafrelsheikh UniversityKafrelSheikhEgypt Department of Pediatrics Northern Jiangsu People’s HospitalClinical Medical CollegeYangzhou UniversityYangzhou 225001China State Key Laboratory of Sheep Genetic Improvement and Healthy Production Xinjiang Academy of Agricultural Reclamation ScienceShihezi 832000China

Background Exposure to bisphenol A(BPA),an environmental pollutant known for its endocrine-disrupting properties,during gestation has been reported to increase the risk of fetal growth restriction(FGR)in an ovine model of *** hypothesized that the FGR results from the BPA-induced insufficiency and barrier dysfunction of the placenta,oxidative stress,inflammatory responses,autophagy and endoplasmic reticulum stress(ERS).However,precise mechanisms underlying the BPA-induced placental dysfunction,and subsequently,FGR,as well as the potential involvement of placental ERS in these complications,remain to be *** In vivo experiment,16 twin-pregnant(from d 40 to 130 of gestation)Hu ewes were randomly distributed into two groups(8 ewes each).One group served as a control and received corn oil once a day,whereas the other group received BPA(5 mg/kg/d as a subcutaneous injection).In vitro study,ovine trophoblast cells(OTCs)were exposed to 4 treatments,6 replicates *** OTCs were treated with 400μmol/L BPA,400μmol/L BPA+0.5μg/m L tunicamycin(Tm;ERS activator),400μmol/L BPA+1μmol/L 4-phenyl butyric acid(4-PBA;ERS antagonist)and DMEM/F12 complete medium(control),for 24 *** In vivo experiments,pregnant Hu ewes receiving the BPA from 40 to 130 days of pregnancy experienced a decrease in placental efficiency,progesterone(P4)level and fetal weight,and an increase in placental estrogen(E2)level,together with barrier dysfunctions,OS,inflammatory responses,autophagy and ERS in type A *** vitro experiment,the OTCs exposed to BPA for 24 h showed an increase in the E2 level and related protein and gene expressions of autophagy,ERS,pro-apoptosis and inflammatory response,and a decrease in the P4 level and the related protein and gene expressions of antioxidant,anti-apoptosis and barrier ***,treating the OTCs with Tm aggravated BPA-induced dysfunction of barrier and endocrine(the increased E2 level and decreased P4 level),OS,inflamm

关键词： Autophagy Bisphenol A Endoplasmic reticulum stress Fetal growth restriction Inflammatory responses Sheep

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Advances in Atomic Time Scale Imaging with a Fine Intrinsic Spatial Resolution

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Ultrafast Science 2024年第2期4卷 29-43页

作者： jingzhen Li yi Cai Xuanke Zeng Xiaowei Lu Qifan Zhu Yongle Zhu Shenzhen Key Laboratory of Micro/Nano Photonic Information Technology Institute of Photonic EngineeringSchool of Physics and Opto-electronic EngineeringShenzhen UniversityShenzhen 518060China

Atomic time scale imaging,opening a new era for studying dynamics in microcosmos,is presently attracting immense research interest on the global level due to its powerful *** the atom level,physics,chemistry,and biology are identical for researching atom motion and atomic state *** light possesses twoness,the information carrier and the research *** most fundamental principle of this imaging is that light records the event-modulated light field by itself,so-called all-optical *** paper can answer what is the essential standard to develop and evaluate atomic time scale imaging,what is the optimal imaging system,and what are the typical techniques to implement this imaging,up to *** present,the best record in the experiment,made by multistage optical parametric amplification(MOPA),is realizing 50-fs resolved optical imaging with a spatial resolution of~83 lp/mm at an effective framing rate of 15×10^(12)fps for recording an ultrafast optical lattice with its rotating speed up to 13.5×10^(12)rad/s.

关键词： attracting rotating identical

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A Model for Detecting Fake News by Integrating Domain-Specific Emotional and Semantic Features

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Computers, Materials & Continua 2024年第8期80卷 2161-2179页

作者： Wen Jiang Mingshu zhang Xu’an Wang Wei Bin Xiong zhang Kelan Ren Facheng Yan College of Cryptography Engineering Engineering University of People’s Armed PoliceXi’an710086China Key Laboratory of Network and Information Security Engineering University of People’s Armed PoliceXi’an710086China Key Laboratory of CTC&Information Engineering Engineering University of People’s Armed PoliceMinistry of EducationXi’an710086China

With the rapid spread of Internet information and the spread of fake news,the detection of fake news becomes more and more *** detection methods often rely on a single emotional or semantic feature to identify fake news,but these methods have limitations when dealing with news in specific *** order to solve the problem of weak feature correlation between data from different domains,a model for detecting fake news by integrating domain-specific emotional and semantic features is *** method makes full use of the attention mechanism,grasps the correlation between different features,and effectively improves the effect of feature *** algorithm first extracts the semantic features of news text through the Bi-LSTM(Bidirectional Long Short-Term Memory)layer to capture the contextual relevance of news ***-BiLSTM is then used to extract emotional features and predict the probability of positive and negative emotions in the *** then uses domain features as an enhancement feature and attention mechanism to fully capture more fine-grained emotional features associated with that ***,the fusion features are taken as the input of the fake news detection classifier,combined with the multi-task representation of information,and the MLP and Softmax functions are used for *** experimental results show that on the Chinese dataset Weibo21,the F1 value of this model is 0.958,4.9% higher than that of the sub-optimal model;on the English dataset FakeNewsNet,the F1 value of the detection result of this model is 0.845,1.8% higher than that of the sub-optimal model,which is advanced and feasible.

关键词： Fake news detection domain-related emotional features semantic features feature fusion

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基于多代理强化学习的多新型市场主体虚拟电厂博弈竞价及效益分配策略

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电网技术 2024年第5期48卷 1980-1991,I0052,I0053页

作者：张继行张一王旭蒋传文王玲玲电力传输与功率变换控制教育部重点实验室(上海交通大学) 上海市闵行区200240 雅砻江流域水电开发有限公司四川省成都市610051

目前新型市场主体规模较小但数量众多,为提高竞争力可以使其组成联盟以多新型市场主体虚拟电厂的形式参与市场博弈,而公平的效益分配方法是维持联盟稳定的基础。为此,该文提出了一种多新型市场主体虚拟电厂博弈竞价及效益分配策略。首先... 详细信息

目前新型市场主体规模较小但数量众多,为提高竞争力可以使其组成联盟以多新型市场主体虚拟电厂的形式参与市场博弈,而公平的效益分配方法是维持联盟稳定的基础。为此,该文提出了一种多新型市场主体虚拟电厂博弈竞价及效益分配策略。首先,考虑多新型市场主体虚拟电厂和传统机组均作为价格影响者,构建包含电能量和备用辅助服务的主辅联合市场交易模型,并在不完全信息市场环境下采用多代理强化学习(multi-agentreinforcementlearning,MADDPG)算法求解。其次,采用分布式联盟构造方法得到最优多新型市场主体联盟结构。为解决效益分配方法中的维数灾问题,引入蒙特卡洛近似夏普利值,对虚拟电厂内各新型市场主体的超额收益进行合理分配。最后,算例分析表明所提方法给出了多新型主体虚拟电厂参与主辅联合市场的最优联盟结构和竞价策略,在保证精度的前提下提高了超额收益分配的计算速度,与单独参与市场相比提高了所有新型市场主体的收益。

关键词：虚拟电厂主辅联合市场多代理强化学习最优联盟结构夏普利值

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