Introduction.Well-designed,strictly implemented,and fully standardized randomized controlled trials(RCTs)are a prerequisite for developing reliable scientific evidence,which can improve clinical practice,health outcom...Introduction.Well-designed,strictly implemented,and fully standardized randomized controlled trials(RCTs)are a prerequisite for developing reliable scientific evidence,which can improve clinical practice,health outcomes,and ultimately benefit patients.Suboptimal reporting is pervasive in medical research,resulting in biased research records and persistent uncertainty about the quality of available evidence.1,2,3,4 The standardization of research reports has attracted considerable attention.In 1996,the Consolidated Standards of Reporting Trials(CONSORT)was first published to improve the quality of RCTs and enhance the reproducibility of trial methods,results,and inferences.展开更多
Highly transparent,durable,and flexible liquid-repellent coatings are urgently needed in the realm of transparent materials,such as car windows,optical lenses,solar panels,and flexible screen materials.However,it has ...Highly transparent,durable,and flexible liquid-repellent coatings are urgently needed in the realm of transparent materials,such as car windows,optical lenses,solar panels,and flexible screen materials.However,it has been difficult to strike a balance between the robustness and flexibility of coatings constructed by a single cross-linked network design.To overcome the conundrum,this innovative approach effectively combines two distinct cross-linked networks with unique functions,thus overcoming the challenge.Through a tightly interwoven structure comprised of added crosslinking sites,the coating achieves improved liquid repellency(WCA>100°,OSA<10°),increased durability(withstands 2,000 cycles of cotton wear),enhanced flexibility(endures 5,000 cycles of bending with a bending radius of 1 mm),and maintains high transparency(over 98%in the range of 410 nm to 760 nm).Additionally,the coating with remarkable adhesion can be applied to multiple substrates,enabling large-scale preparation and easy cycling coating,thus expanding its potential applications.The architecture of this fluoride-free dual cross-linked network not only advances liquid-repellent surfaces but also provides valuable insights for the development of eco-friendly materials in the future.展开更多
Blockchain Technology(BT)has emerged as a transformative solution for improving the efficacy,security,and transparency of supply chain intelligence.Traditional Supply Chain Management(SCM)systems frequently have probl...Blockchain Technology(BT)has emerged as a transformative solution for improving the efficacy,security,and transparency of supply chain intelligence.Traditional Supply Chain Management(SCM)systems frequently have problems such as data silos,a lack of visibility in real time,fraudulent activities,and inefficiencies in tracking and traceability.Blockchain’s decentralized and irreversible ledger offers a solid foundation for dealing with these issues;it facilitates trust,security,and the sharing of data in real-time among all parties involved.Through an examination of critical technologies,methodology,and applications,this paper delves deeply into computer modeling based-blockchain framework within supply chain intelligence.The effect of BT on SCM is evaluated by reviewing current research and practical applications in the field.As part of the process,we delved through the research on blockchain-based supply chain models,smart contracts,Decentralized Applications(DApps),and how they connect to other cutting-edge innovations like Artificial Intelligence(AI)and the Internet of Things(IoT).To quantify blockchain’s performance,the study introduces analytical models for efficiency improvement,security enhancement,and scalability,enabling computational assessment and simulation of supply chain scenarios.These models provide a structured approach to predicting system performance under varying parameters.According to the results,BT increases efficiency by automating transactions using smart contracts,increases security by using cryptographic techniques,and improves transparency in the supply chain by providing immutable records.Regulatory concerns,challenges with interoperability,and scalability all work against broad adoption.To fully automate and intelligently integrate blockchain with AI and the IoT,additional research is needed to address blockchain’s current limitations and realize its potential for supply chain intelligence.展开更多
The rise of DeepSeek marks a significant milestone in the evolution of artificial intelligence(AI),akin to the groundbreaking debut of OpenAI’s GPT-3 in 2020.Positioned as a cost-effective yet high-performing alterna...The rise of DeepSeek marks a significant milestone in the evolution of artificial intelligence(AI),akin to the groundbreaking debut of OpenAI’s GPT-3 in 2020.Positioned as a cost-effective yet high-performing alternative to leading large language models(LLMs)like OpenAI’s GPT-4,Meta’s Llama 3,and Anthropic’s Claude 3.5,DeepSeek-V3 has demonstrated remarkable capabilities while substantially reducing training costs.展开更多
Superhydrophobic glass has inspiring development prospects in endoscopes,solar panels and other engineering and medical fields.However,the surface topography required to achieve superhydrophobicity will inevitably aff...Superhydrophobic glass has inspiring development prospects in endoscopes,solar panels and other engineering and medical fields.However,the surface topography required to achieve superhydrophobicity will inevitably affect the surface transparency and limit the application of glass materials.To resolve the contradiction between the surface transparency and the robust superhydrophobicity,an efficient and low-cost laser-chemical surface functionalization process was utilized to fabricate superhydrophobic glass surface.The results show that the air can be effectively trapped in surface micro/nanostructure induced by laser texturing,thus reducing the solid-liquid contact area and interfacial tension.The deposition of hydrophobic carbon-containing groups on the surface can be accelerated by chemical treatment,and the surface energy is significantly reduced.The glass surface exhibits marvelous robust superhydrophobicity with a contact angle of 155.8°and a roll-off angle of 7.2°under the combination of hierarchical micro/nanostructure and low surface energy.Moreover,the surface transparency of the prepared superhydrophobic glass was only 5.42%lower than that of the untreated surface.This superhydrophobic glass with high transparency still maintains excellent superhydrophobicity after durability and stability tests.The facile fabrication of superhydrophobic glass with high transparency and robustness provides a strong reference for further expanding the application value of glass materials.展开更多
It is urgent to develop high-performance polyimide(PI)films that simultaneously exhibit high transparency,exceptional thermal stability,mechanical robustness,and low dielectric to fulfil the requirements of flexible d...It is urgent to develop high-performance polyimide(PI)films that simultaneously exhibit high transparency,exceptional thermal stability,mechanical robustness,and low dielectric to fulfil the requirements of flexible display technologies.Herein,a series of fluorinated polyimide films(FPIs)were fabricated by the condensation of 5,5′-(perfluoropropane-2,2-diyl)bis(isobenzofuran-1,3-dione)(6FDA)and the fluorinated triphenylmethane diamine monomer(EDA,MEDA and DMEDA)with heat-crosslinkable tetrafluorostyrene side groups,which was incorporated by different numbers of methyl groups pendant in the ortho position of amino groups.Subsequently,the FPI films underwent heating to produce crosslinking FPIs(C-FPIs)through the self-crosslinking of double bonds in the tetrafluorostyrene.The transparency,solvent resistance,thermal stability,mechanical robustness and dielectric properties of FPI and C-FPI films can be tuned by the number of methyl groups and crosslinking,which were deeply investigated by virtue of molecular dynamics(MD)simulations and density functional theory(DFT).As a result,all the films exhibited exceptional optically colorless and transparent,with transmittance in the visible region of 450-700 nm exceeding 79.9%,and the cut-off wavelengths(λ_(off))were nearly 350 nm.The thermal decomposition temperatures at 5% weight loss(T_(d5%))for all samples exceeded 504℃.These films exhibited a wide range of tunable tensile strength(46.5-75.1 MPa).Significantly,they showed exceptional dielectric properties with the dielectric constant of 2.3-2.5 at full frequency(10^(7)-20 Hz).This study not only highlights the relationship between the polymer molecular structure and properties,but offer insights for balancing optical transparency,heat resistance and low dielectric constant in PI films.展开更多
We demonstrate multiple transparency windows in a cavity opto-magnomechanical system containing a ferromagnetic material yttrium iron garnet(YIG)crystal.The probe output spectrum reveals the simultaneous emergence of ...We demonstrate multiple transparency windows in a cavity opto-magnomechanical system containing a ferromagnetic material yttrium iron garnet(YIG)crystal.The probe output spectrum reveals the simultaneous emergence of three distinct phenomena:magnon-induced transparency(MIT)arising from microwave–magnon coupling;magnomechanically induced transparency(MMIT)through phonon–magnon interaction,and optomechanically induced transparency(OMIT)mediated by optical cavity–photon coupling.Crucially,these transparency features demonstrate dynamic tunability through precise manipulation of the number of interacting modes and coupling strengths.Our study reveals the effects of magnon–microwave and optomechanical coupling on probe results and the role of quantum interference mechanisms in a resonant system.Moreover,the fast-slow light effect can be enhanced and switched by choosing appropriate coupling parameters.Our work has potential applications in multi-band quantum storage and multi-channel photonic information processing devices.展开更多
Polyvinyl alcohol(PVA)-based hydrogels are widely used in the fields of tissue engineering,biomedicine,and flexible sensors due to their low cost,excellent biocompatibility,and simple gelation methods.Re-peated freeze...Polyvinyl alcohol(PVA)-based hydrogels are widely used in the fields of tissue engineering,biomedicine,and flexible sensors due to their low cost,excellent biocompatibility,and simple gelation methods.Re-peated freeze-thaw cycles are essential for the preparation of such hydrogels.Although this process can enhance the mechanical properties of the hydrogels to a certain extent,it can also result in opacity and limited tensile performance,significantly restricting their application in wearable devices and electronic skin.This study introduced cellulose nanofibers into polyacrylamide(PAM)/PVA double interpenetrat-ing network hydrogel system,achieving the preparation of a multifunctional composite hydrogel with a“triple-network interlock”structure.Under the synergistic effects of multiple networks,multiple hy-drogen bonds,and nano-reinforcement,this composite hydrogel requires only a single freeze-thaw cycle to achieve a tensile strength exceeding 1 MPa,which is significantly higher than that of PVA hydro-gels subjected to multiple freeze-thaw cycles.The PVA-based hydrogel prepared in this work balances tensile strength(1.41 MPa),elongation(1332%),transparency(89.8%),and toughness(6.73 MJ m^(-3)).Ad-ditionally,this composite hydrogel exhibits high sensitivity(GF=8.74),rapid response(108 ms),fatigue resistance,and antibacterial properties,making it a reliable strain sensor over a wide strain range.When encapsulated on human joints,it can monitor body movements in real-time,such as movements of fin-gers,wrists,elbows,and knees,and can be integrated into peripheral circuits to achieve precise real-time control of robotic hands.This work presents a multifunctional composite hydrogel with great potential as a candidate material for tissue engineering,human-machine interaction,and high-performance wearable sensors.展开更多
In this paper,we present a metamaterial structure of Dirac and vanadium dioxide(VO_(2))and investigate its optical properties using the finite-difference time-domain(FDTD)technique.Using the phase transition feature o...In this paper,we present a metamaterial structure of Dirac and vanadium dioxide(VO_(2))and investigate its optical properties using the finite-difference time-domain(FDTD)technique.Using the phase transition feature of VO_(2),the design can realize active tuning of the plasmon induced transparency(PIT)effect at terahertz frequency,thereby converting from a single PIT to a double-PIT.When VO_(2) is in the insulating state,the structure is symmetric to obtain a single-band PIT effect.When VO_(2) is in the metallic state,the structure turns asymmetric to realize a dual-band PIT effect.This design provides a reference direction for the design of actively tunable metamaterials.Additionally,it is discovered that the transparent window's resonant frequency and the Fermi level in this structure have a somewhat linear relationship.In addition,the structure achieves superior refractive index sensitivity in the terahertz band,surpassing 1 THz/RIU.Consequently,the design exhibits encouraging potential for application in refractive index sensors and optical switches.展开更多
In this paper,we investigate the phenomena of electromagnetically induced transparency and the generation of second-order sideband in a Laguerre–Gaussian cavity optorotational system with a Kerr nonlinear medium.Usin...In this paper,we investigate the phenomena of electromagnetically induced transparency and the generation of second-order sideband in a Laguerre–Gaussian cavity optorotational system with a Kerr nonlinear medium.Using the perturbation method,we analyze the first-and second-order sideband generations in the output field from the system under the actions of a strong control field and a weak probe field.Numerical simulations show that the Kerr nonlinearity can lead to the occurrence of the asymmetric line shape in the transmission of the probe field.Comparing with traditional scheme for generating the second-order sideband,our spectral shape of the second-order sideband is amplified and becomes asymmetric,which has potential applications in precision measurement,high-sensitivity devices,and frequency conversion.展开更多
Coal mining induces changes in the nature of rock and soil bodies,as well as hydrogeological conditions,which can easily trigger the occurrence of geological disasters such as water inrush,movement of the coal seam ro...Coal mining induces changes in the nature of rock and soil bodies,as well as hydrogeological conditions,which can easily trigger the occurrence of geological disasters such as water inrush,movement of the coal seam roof and floor,and rock burst.Transparency in coal mine geological conditions provides technical support for intelligent coal mining and geological disaster prevention.In this sense,it is of great significance to address the requirements for informatizing coal mine geological conditions,dynamically adjust sensing parameters,and accurately identify disaster characteristics so as to prevent and control coal mine geological disasters.This paper examines the various action fields associated with geological disasters in mining faces and scrutinizes the types and sensing parameters of geological disasters resulting from coal seam mining.On this basis,it summarizes a distributed fiber-optic sensing technology framework for transparent geology in coal mines.Combined with the multi-field monitoring characteristics of the strain field,the temperature field,and the vibration field of distributed optical fiber sensing technology,parameters such as the strain increment ratio,the aquifer temperature gradient,and the acoustic wave amplitude are extracted as eigenvalues for identifying rock breaking,aquifer water level,and water cut range,and a multi-field sensing method is established for identifying the characteristics of mining-induced rock mass disasters.The development direction of transparent geology based on optical fiber sensing technology is proposed in terms of the aspects of sensing optical fiber structure for large deformation monitoring,identification accuracy of optical fiber acoustic signals,multi-parameter monitoring,and early warning methods.展开更多
In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an...In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an electromagnetically induced transparency(EIT)medium,with a primary focus on elucidating the underlying mechanism of angular momentum transfer.Through comprehensive theoretical analysis and numerical simulations,it is demonstrated that when the probe field carries orbital angular momentum(OAM),the dispersion and absorption characteristics of the EIT medium undergo periodic modulation.This modulation is intricately determined by the azimuthal phase and topological charge of the beam.Notably,the OAM in the driving field exerts no such influence on the medium’s properties.Leveraging vortex phase plates(VPPs)or spatial light modulators(SLMs)to manipulate the tunable OAM enables dynamic control over the EIT effect.This breakthrough not only deepens our understanding of light-matter interactions at the quantum level but also unlocks new avenues for high-dimensional quantum information processing and advanced optical communication technologies.展开更多
In this study,we proposed a bifunctional sensor of high sensitivity and slow light based on monolayer Mo S/TOPAS2structure in the terahertz range.The proposed metamaterial is formed by a structured unit matrix that co...In this study,we proposed a bifunctional sensor of high sensitivity and slow light based on monolayer Mo S/TOPAS2structure in the terahertz range.The proposed metamaterial is formed by a structured unit matrix that combines square and cross shapes made of MoS2and TOPAS.The plasmon-induced transparency(PIT)spectra appeared under the excitation of a transverse magnetic(TM)-polarization wave,the proposed PIT effect is originated from the near-field coupling of two bright modes.The Lorentzian mode theory spectrum describes the destructive interference between the two bright modes,and the fitted results are consistent with the FiniteDifference Time-Domain(FDTD)simulation results.Furthermore,the effect of geometrical sizes,like coupling distance,structure size,and intersection angle between square and cross shape on the PIT window is analyzed,along with the effects of carrier concentration in Mo S2.A figure of merit of-1.10 RIU1is obtained.The slow light performance of the proposed Mo S2-based metamaterial is investigated,a maximum time delay of 0.52 ps is obtained and the delay band width product(DBP)is 0.76.It is more efficient to store and transmit the information over signal channels.Therefore,the proposed Mo S2-based metamaterial can be used in electromagnetically induced transparency applications,such as sensors,optical memory devices,and flexible terahertz functional devices.展开更多
In the regime of Rydberg electromagnetically induced transparency, we study the correlated behaviors between the transmission spectra of a pair of probe fields passing through respective parallel one-dimensional cold ...In the regime of Rydberg electromagnetically induced transparency, we study the correlated behaviors between the transmission spectra of a pair of probe fields passing through respective parallel one-dimensional cold Rydberg ensembles.Due to the van der Waals(vdW) interactions between Rydberg atoms, each ensemble exhibits a local optical nonlinearity,where the output EIT spectra are sensitive to both the input probe intensity and the photonic statistics. More interestingly,a nonlocal optical nonlinearity emerges between two spatially separated ensembles, as the probe transmissivity and probe correlation at the exit of one Rydberg ensemble can be manipulated by the probe field at the input of the other Rydberg ensemble. Realizing correlated Rydberg EITs holds great potential for applications in quantum control, quantum network,quantum walk and so on.展开更多
基金supported by the Talent Development Plan for High-level Public Health Technical Personnel Project in Beijing,Beijing Municipal Health Commission[No.XKGG-02-03].
文摘Introduction.Well-designed,strictly implemented,and fully standardized randomized controlled trials(RCTs)are a prerequisite for developing reliable scientific evidence,which can improve clinical practice,health outcomes,and ultimately benefit patients.Suboptimal reporting is pervasive in medical research,resulting in biased research records and persistent uncertainty about the quality of available evidence.1,2,3,4 The standardization of research reports has attracted considerable attention.In 1996,the Consolidated Standards of Reporting Trials(CONSORT)was first published to improve the quality of RCTs and enhance the reproducibility of trial methods,results,and inferences.
基金financially supported by the National Natu-ral Science Foundation of China(Nos.22375047,22378068,and 22075046)the Natural Science Foundation of Fujian Province(No.2022J01568)+2 种基金the National Key Research and Development Program of China(Nos.2022YFB3804905 and 2022YFB3804900)China Postdoctoral Science Foundation(No.2023M743437)start-up funding from Wenzhou Institute,University of Chinese Academy of Sciences(No.WIUCASQD2019002).
文摘Highly transparent,durable,and flexible liquid-repellent coatings are urgently needed in the realm of transparent materials,such as car windows,optical lenses,solar panels,and flexible screen materials.However,it has been difficult to strike a balance between the robustness and flexibility of coatings constructed by a single cross-linked network design.To overcome the conundrum,this innovative approach effectively combines two distinct cross-linked networks with unique functions,thus overcoming the challenge.Through a tightly interwoven structure comprised of added crosslinking sites,the coating achieves improved liquid repellency(WCA>100°,OSA<10°),increased durability(withstands 2,000 cycles of cotton wear),enhanced flexibility(endures 5,000 cycles of bending with a bending radius of 1 mm),and maintains high transparency(over 98%in the range of 410 nm to 760 nm).Additionally,the coating with remarkable adhesion can be applied to multiple substrates,enabling large-scale preparation and easy cycling coating,thus expanding its potential applications.The architecture of this fluoride-free dual cross-linked network not only advances liquid-repellent surfaces but also provides valuable insights for the development of eco-friendly materials in the future.
基金supported by Princess Nourah bint Abdulrahman University Researchers Supporting Project Number(PNURSP2025R97)Princess Nourah bint Abdulrahman University,Riyadh,Saudi Arabia。
文摘Blockchain Technology(BT)has emerged as a transformative solution for improving the efficacy,security,and transparency of supply chain intelligence.Traditional Supply Chain Management(SCM)systems frequently have problems such as data silos,a lack of visibility in real time,fraudulent activities,and inefficiencies in tracking and traceability.Blockchain’s decentralized and irreversible ledger offers a solid foundation for dealing with these issues;it facilitates trust,security,and the sharing of data in real-time among all parties involved.Through an examination of critical technologies,methodology,and applications,this paper delves deeply into computer modeling based-blockchain framework within supply chain intelligence.The effect of BT on SCM is evaluated by reviewing current research and practical applications in the field.As part of the process,we delved through the research on blockchain-based supply chain models,smart contracts,Decentralized Applications(DApps),and how they connect to other cutting-edge innovations like Artificial Intelligence(AI)and the Internet of Things(IoT).To quantify blockchain’s performance,the study introduces analytical models for efficiency improvement,security enhancement,and scalability,enabling computational assessment and simulation of supply chain scenarios.These models provide a structured approach to predicting system performance under varying parameters.According to the results,BT increases efficiency by automating transactions using smart contracts,increases security by using cryptographic techniques,and improves transparency in the supply chain by providing immutable records.Regulatory concerns,challenges with interoperability,and scalability all work against broad adoption.To fully automate and intelligently integrate blockchain with AI and the IoT,additional research is needed to address blockchain’s current limitations and realize its potential for supply chain intelligence.
文摘The rise of DeepSeek marks a significant milestone in the evolution of artificial intelligence(AI),akin to the groundbreaking debut of OpenAI’s GPT-3 in 2020.Positioned as a cost-effective yet high-performing alternative to leading large language models(LLMs)like OpenAI’s GPT-4,Meta’s Llama 3,and Anthropic’s Claude 3.5,DeepSeek-V3 has demonstrated remarkable capabilities while substantially reducing training costs.
基金Projects(52105175,52305149)supported by the National Natural Science Foundation of ChinaProject(2242024RCB0035)supported by the Zhishan Young Scholar Program of Southeast University,China+5 种基金Project(BK20210235)supported by the Natural Science Foundation of Jiangsu Province,ChinaProject(2023MK042)supported by the State Administration for Market Regulation,ChinaProject(KJ2023003)supported by the Jiangsu Administration for Market Regulation,ChinaProjects(KJ(Y)202429,KJ(YJ)2023001)supported by the Jiangsu Province Special Equipment Safety Supervision Inspection Institute,ChinaProject(JSSCBS20210121)supported by the Jiangsu Provincial Innovative and Entrepreneurial Doctor Program,ChinaProject(1102002310)supported by the Technology Innovation Project for Returnees in Nanjing,China。
文摘Superhydrophobic glass has inspiring development prospects in endoscopes,solar panels and other engineering and medical fields.However,the surface topography required to achieve superhydrophobicity will inevitably affect the surface transparency and limit the application of glass materials.To resolve the contradiction between the surface transparency and the robust superhydrophobicity,an efficient and low-cost laser-chemical surface functionalization process was utilized to fabricate superhydrophobic glass surface.The results show that the air can be effectively trapped in surface micro/nanostructure induced by laser texturing,thus reducing the solid-liquid contact area and interfacial tension.The deposition of hydrophobic carbon-containing groups on the surface can be accelerated by chemical treatment,and the surface energy is significantly reduced.The glass surface exhibits marvelous robust superhydrophobicity with a contact angle of 155.8°and a roll-off angle of 7.2°under the combination of hierarchical micro/nanostructure and low surface energy.Moreover,the surface transparency of the prepared superhydrophobic glass was only 5.42%lower than that of the untreated surface.This superhydrophobic glass with high transparency still maintains excellent superhydrophobicity after durability and stability tests.The facile fabrication of superhydrophobic glass with high transparency and robustness provides a strong reference for further expanding the application value of glass materials.
基金financially supported by the Natural Science Foundation of Shandong Province(Nos.ZR2021ME055,ZR2022QB170 and ZR2022MB034)the Foundation(No.GZKF202128)of State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology,Shandong Academy of Sciencesthe Development Program Project of Young Innovation Team of Institutions of Higher Learning in Shandong Province.
文摘It is urgent to develop high-performance polyimide(PI)films that simultaneously exhibit high transparency,exceptional thermal stability,mechanical robustness,and low dielectric to fulfil the requirements of flexible display technologies.Herein,a series of fluorinated polyimide films(FPIs)were fabricated by the condensation of 5,5′-(perfluoropropane-2,2-diyl)bis(isobenzofuran-1,3-dione)(6FDA)and the fluorinated triphenylmethane diamine monomer(EDA,MEDA and DMEDA)with heat-crosslinkable tetrafluorostyrene side groups,which was incorporated by different numbers of methyl groups pendant in the ortho position of amino groups.Subsequently,the FPI films underwent heating to produce crosslinking FPIs(C-FPIs)through the self-crosslinking of double bonds in the tetrafluorostyrene.The transparency,solvent resistance,thermal stability,mechanical robustness and dielectric properties of FPI and C-FPI films can be tuned by the number of methyl groups and crosslinking,which were deeply investigated by virtue of molecular dynamics(MD)simulations and density functional theory(DFT).As a result,all the films exhibited exceptional optically colorless and transparent,with transmittance in the visible region of 450-700 nm exceeding 79.9%,and the cut-off wavelengths(λ_(off))were nearly 350 nm.The thermal decomposition temperatures at 5% weight loss(T_(d5%))for all samples exceeded 504℃.These films exhibited a wide range of tunable tensile strength(46.5-75.1 MPa).Significantly,they showed exceptional dielectric properties with the dielectric constant of 2.3-2.5 at full frequency(10^(7)-20 Hz).This study not only highlights the relationship between the polymer molecular structure and properties,but offer insights for balancing optical transparency,heat resistance and low dielectric constant in PI films.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.62071376,62405041,52175531,and 62005211)the National Key Laboratory of Science and Technology on Space Microwave(Grant No.HTKJ2024KL504002)+1 种基金the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices(Grant No.KF202408)the Natural Science Foundation of Chongqing(Grant No.CSTB2024NSCQ-MSX0746)。
文摘We demonstrate multiple transparency windows in a cavity opto-magnomechanical system containing a ferromagnetic material yttrium iron garnet(YIG)crystal.The probe output spectrum reveals the simultaneous emergence of three distinct phenomena:magnon-induced transparency(MIT)arising from microwave–magnon coupling;magnomechanically induced transparency(MMIT)through phonon–magnon interaction,and optomechanically induced transparency(OMIT)mediated by optical cavity–photon coupling.Crucially,these transparency features demonstrate dynamic tunability through precise manipulation of the number of interacting modes and coupling strengths.Our study reveals the effects of magnon–microwave and optomechanical coupling on probe results and the role of quantum interference mechanisms in a resonant system.Moreover,the fast-slow light effect can be enhanced and switched by choosing appropriate coupling parameters.Our work has potential applications in multi-band quantum storage and multi-channel photonic information processing devices.
基金supported by the National Key Research and Development Program(No.2022YFB3304000)the National Natural Science Foundation of China(No.52275292)+5 种基金the Fundamental Research Funds for the Central Universities(No.D5000240313)the Key Research and Development Program of Shaanxi Province(No.2022GY-228)the Science and technology planning project of Xian(No.20KYPT0002-1)the Fundamental Research Funds for the Central Universities(Nos.D5000230084 and 3102022gxb002)the Shaanxi Province Key Research and Development Projects(Nos.2021LLRH08 and 2022GXLH-02-15)the Emerging Interdisciplinary Project of Northwestern Polytechnical University(No.22GH0306).
文摘Polyvinyl alcohol(PVA)-based hydrogels are widely used in the fields of tissue engineering,biomedicine,and flexible sensors due to their low cost,excellent biocompatibility,and simple gelation methods.Re-peated freeze-thaw cycles are essential for the preparation of such hydrogels.Although this process can enhance the mechanical properties of the hydrogels to a certain extent,it can also result in opacity and limited tensile performance,significantly restricting their application in wearable devices and electronic skin.This study introduced cellulose nanofibers into polyacrylamide(PAM)/PVA double interpenetrat-ing network hydrogel system,achieving the preparation of a multifunctional composite hydrogel with a“triple-network interlock”structure.Under the synergistic effects of multiple networks,multiple hy-drogen bonds,and nano-reinforcement,this composite hydrogel requires only a single freeze-thaw cycle to achieve a tensile strength exceeding 1 MPa,which is significantly higher than that of PVA hydro-gels subjected to multiple freeze-thaw cycles.The PVA-based hydrogel prepared in this work balances tensile strength(1.41 MPa),elongation(1332%),transparency(89.8%),and toughness(6.73 MJ m^(-3)).Ad-ditionally,this composite hydrogel exhibits high sensitivity(GF=8.74),rapid response(108 ms),fatigue resistance,and antibacterial properties,making it a reliable strain sensor over a wide strain range.When encapsulated on human joints,it can monitor body movements in real-time,such as movements of fin-gers,wrists,elbows,and knees,and can be integrated into peripheral circuits to achieve precise real-time control of robotic hands.This work presents a multifunctional composite hydrogel with great potential as a candidate material for tissue engineering,human-machine interaction,and high-performance wearable sensors.
基金supported by the Natural Science Foundation of Chongqing of China(No.CSTB2024NSCQ-MSX0746)the Young Scientists Fund of the National Natural Science Foundation of China(No.11704053)+1 种基金the National Natural Science Foundation of China(No.52175531)the Science and Technology Research Program of Chongqing Municipal Education Commission(Nos.KJQN 201800629,KJZD-M202000602 and 62375031)。
文摘In this paper,we present a metamaterial structure of Dirac and vanadium dioxide(VO_(2))and investigate its optical properties using the finite-difference time-domain(FDTD)technique.Using the phase transition feature of VO_(2),the design can realize active tuning of the plasmon induced transparency(PIT)effect at terahertz frequency,thereby converting from a single PIT to a double-PIT.When VO_(2) is in the insulating state,the structure is symmetric to obtain a single-band PIT effect.When VO_(2) is in the metallic state,the structure turns asymmetric to realize a dual-band PIT effect.This design provides a reference direction for the design of actively tunable metamaterials.Additionally,it is discovered that the transparent window's resonant frequency and the Fermi level in this structure have a somewhat linear relationship.In addition,the structure achieves superior refractive index sensitivity in the terahertz band,surpassing 1 THz/RIU.Consequently,the design exhibits encouraging potential for application in refractive index sensors and optical switches.
基金supported by the National Natural Science Foundation of China(Grant Nos.12174344 and 12175199)Foundation of Department of Science and Technology of Zhejiang Province(Grant No.2022R52047)。
文摘In this paper,we investigate the phenomena of electromagnetically induced transparency and the generation of second-order sideband in a Laguerre–Gaussian cavity optorotational system with a Kerr nonlinear medium.Using the perturbation method,we analyze the first-and second-order sideband generations in the output field from the system under the actions of a strong control field and a weak probe field.Numerical simulations show that the Kerr nonlinearity can lead to the occurrence of the asymmetric line shape in the transmission of the probe field.Comparing with traditional scheme for generating the second-order sideband,our spectral shape of the second-order sideband is amplified and becomes asymmetric,which has potential applications in precision measurement,high-sensitivity devices,and frequency conversion.
基金National Natural Science Foundation of China,Grant/Award Number:42130706。
文摘Coal mining induces changes in the nature of rock and soil bodies,as well as hydrogeological conditions,which can easily trigger the occurrence of geological disasters such as water inrush,movement of the coal seam roof and floor,and rock burst.Transparency in coal mine geological conditions provides technical support for intelligent coal mining and geological disaster prevention.In this sense,it is of great significance to address the requirements for informatizing coal mine geological conditions,dynamically adjust sensing parameters,and accurately identify disaster characteristics so as to prevent and control coal mine geological disasters.This paper examines the various action fields associated with geological disasters in mining faces and scrutinizes the types and sensing parameters of geological disasters resulting from coal seam mining.On this basis,it summarizes a distributed fiber-optic sensing technology framework for transparent geology in coal mines.Combined with the multi-field monitoring characteristics of the strain field,the temperature field,and the vibration field of distributed optical fiber sensing technology,parameters such as the strain increment ratio,the aquifer temperature gradient,and the acoustic wave amplitude are extracted as eigenvalues for identifying rock breaking,aquifer water level,and water cut range,and a multi-field sensing method is established for identifying the characteristics of mining-induced rock mass disasters.The development direction of transparent geology based on optical fiber sensing technology is proposed in terms of the aspects of sensing optical fiber structure for large deformation monitoring,identification accuracy of optical fiber acoustic signals,multi-parameter monitoring,and early warning methods.
文摘In the burgeoning field of light-matter interactions,angular momentum has emerged as a pivotal factor,driving innovative research directions.This study delves into the interaction dynamics between vortex lights and an electromagnetically induced transparency(EIT)medium,with a primary focus on elucidating the underlying mechanism of angular momentum transfer.Through comprehensive theoretical analysis and numerical simulations,it is demonstrated that when the probe field carries orbital angular momentum(OAM),the dispersion and absorption characteristics of the EIT medium undergo periodic modulation.This modulation is intricately determined by the azimuthal phase and topological charge of the beam.Notably,the OAM in the driving field exerts no such influence on the medium’s properties.Leveraging vortex phase plates(VPPs)or spatial light modulators(SLMs)to manipulate the tunable OAM enables dynamic control over the EIT effect.This breakthrough not only deepens our understanding of light-matter interactions at the quantum level but also unlocks new avenues for high-dimensional quantum information processing and advanced optical communication technologies.
基金supported by the National Natural Science Foundation of China(Grant Nos.12075036,12375008)Hubei Provincial Natural Science Foundation Innovation Group Project(Grant No.2023AFA025)The Open Foundation Project of Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology。
文摘In this study,we proposed a bifunctional sensor of high sensitivity and slow light based on monolayer Mo S/TOPAS2structure in the terahertz range.The proposed metamaterial is formed by a structured unit matrix that combines square and cross shapes made of MoS2and TOPAS.The plasmon-induced transparency(PIT)spectra appeared under the excitation of a transverse magnetic(TM)-polarization wave,the proposed PIT effect is originated from the near-field coupling of two bright modes.The Lorentzian mode theory spectrum describes the destructive interference between the two bright modes,and the fitted results are consistent with the FiniteDifference Time-Domain(FDTD)simulation results.Furthermore,the effect of geometrical sizes,like coupling distance,structure size,and intersection angle between square and cross shape on the PIT window is analyzed,along with the effects of carrier concentration in Mo S2.A figure of merit of-1.10 RIU1is obtained.The slow light performance of the proposed Mo S2-based metamaterial is investigated,a maximum time delay of 0.52 ps is obtained and the delay band width product(DBP)is 0.76.It is more efficient to store and transmit the information over signal channels.Therefore,the proposed Mo S2-based metamaterial can be used in electromagnetically induced transparency applications,such as sensors,optical memory devices,and flexible terahertz functional devices.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11874004, 1124019, 12204137, and 12404299)the Hainan Provincial Natural Science Foundation of China (Grant No. 122QN302)supported by the specific research fund of The Innovation Platform for Academicians of Hainan Province (Grant Nos. YSPTZX202215 and YSPTZX202207)。
文摘In the regime of Rydberg electromagnetically induced transparency, we study the correlated behaviors between the transmission spectra of a pair of probe fields passing through respective parallel one-dimensional cold Rydberg ensembles.Due to the van der Waals(vdW) interactions between Rydberg atoms, each ensemble exhibits a local optical nonlinearity,where the output EIT spectra are sensitive to both the input probe intensity and the photonic statistics. More interestingly,a nonlocal optical nonlinearity emerges between two spatially separated ensembles, as the probe transmissivity and probe correlation at the exit of one Rydberg ensemble can be manipulated by the probe field at the input of the other Rydberg ensemble. Realizing correlated Rydberg EITs holds great potential for applications in quantum control, quantum network,quantum walk and so on.
