The prevalence of social media and mobile computing has led to intensive user engagement in the emergent Cyber-Physical-Social-Thinking(CPST)***,the easy access,the lack of governance,and excessive use has generated a...
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The prevalence of social media and mobile computing has led to intensive user engagement in the emergent Cyber-Physical-Social-Thinking(CPST)***,the easy access,the lack of governance,and excessive use has generated a raft of new behaviors within CPST,which affects users’physical,social,and mental *** this paper,we conceive the Cyber-Syndrome concept to denote the collection of cyber disorders due to excessive or problematic Cyberspace interactions based on CPST *** we characterize the Cyber-Syndrome concept in terms of Maslow’s theory of Needs,from which we establish an in-depth theoretical understanding of Cyber-Syndrome from its etiology,formation,symptoms,and ***,we propose an entropy-based Cyber-Syndrome control mechanism for its computation and *** goal of this study is to give new insights into this rising phenomenon and offer guidance for further research and development.
In low-density steel,κ-carbides primarily precipitate in the form of nanoscale particles within austenite ***,their precipitation within ferrite matrix grains has not been comprehensively explored,and the second-phas...
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In low-density steel,κ-carbides primarily precipitate in the form of nanoscale particles within austenite ***,their precipitation within ferrite matrix grains has not been comprehensively explored,and the second-phase evolution mechanism during aging remains *** this study,the crystallographic characteristics and morphological evolution ofκ-carbides in Fe-28Mn-10Al-0.8C(wt%)low-density steel at different aging temperatures and times and the impacts of these changes on the steels’microhardness and properties were comprehensively *** different heat treatment conditions,intragranularκ-carbides exhibited various morpho-logical and crystallographic characteristics,such as acicular,spherical,and short rod-like *** the initial stage of aging,acicularκ-carbides primarily precipitated,accompanied by a few spherical carbides.κ-Carbides grew and coarsened with aging time,the spherical carbides were considerably reduced,and rod-like carbides *** hardness testing demonstrated that the material’s hardness was affected by the volume fraction,morphology,and size ofκ-*** aging at higher temperatures led to an increase in carbide size and volume fraction,resulting in a gradual rise in *** deformation,the primary mechanisms for strengthening were dislocation strengthening and second-phase *** on these findings,potential strategies for improving material strength are proposed.
Conformal thin-film sensors enable precise monitoring of the operating conditions of components in extreme ***,the development of these sensors encounters major challenges,especially in uniformly applying multiple fil...
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Conformal thin-film sensors enable precise monitoring of the operating conditions of components in extreme ***,the development of these sensors encounters major challenges,especially in uniformly applying multiple film layers on complex metallic surfaces and accurately capturing diverse operational *** work reports a multi-sensor design and multi-layer additive manufacturing process targeting spherical metallic *** proposed high-temperature dip-coating and self-leveling fabrication process achieves high-temperature thin-film coatings with excellent uniformity,high-temperature electrical insulation,and adhesion *** fabricated Ag/Pt thin film thermocouple arrays and a heat flux sensor exhibit a maximum temperature resistance of up to 960℃,with thermoelectric potential outputs and hightemperature resistance closely mirroring those of wire-based Ag/Pt *** environmental testing was conducted using high-power lasers and a flame *** results show that the array of thin-film conformal thermocouples more accurately reflected temperature changes at different points on a spherical *** heat flux sensors achieve responses within 95 ms and with-stand environments with heat fluxes over 1.2 MW/m^(2).The proposed multi-sensor design and fabrication method offers promising monitoring applications in harsh environments,including aerospace and nuclear power.
Origami-based reconfigurable metasurfaces have emerged as a versatile paradigm for dynamically manipulating electromagnetic(EM) waves due to their advantages, such as low manufacturing cost, lightweight, and structura...
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Origami-based reconfigurable metasurfaces have emerged as a versatile paradigm for dynamically manipulating electromagnetic(EM) waves due to their advantages, such as low manufacturing cost, lightweight, and structural deformability. Three-dimensional(3D) deformation can intensify asymmetry among structures, making origami metasurfaces particularly suitable for realizing reconfigurable chiral responses. However, previous studies have primarily focused on modulating spectral properties,such as chiral switching and resonant frequency shifting. There remains ample room for further exploration in complex wavefront manipulation and holographic imaging applications. This paper proposes a simple and efficient deformation method for origami metasurfaces that transforms a spin-insensitive planar metasurface into a 3D metasurface by folding. The breaking of mirror symmetry induces a pronounced chiral response. The binary amplitude is modulated within each pixel. When folded at angles of +θ and-θ, the designed origami metasurface generates distinct images under left-handed circularly polarized(LCP)wave incidence. Meanwhile, holographic encryption is achieved under right-handed circularly polarized(RCP) wave ***, by leveraging origami's reconfigurability, the holographic imaging's operating frequency can be shifted. The experimental results agree well with the numerical calculations and full-wave simulations, demonstrating the broad application potential of this method in areas such as multi-channel imaging, information encryption technologies, and stealth.
Consumption of fried foods is highly prevalent in the Western dietary *** diet has been unfavorably linked with high risk of developing cardiovascular *** failure(HF)as a cardiovascular disease subtype is a growing gl...
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Consumption of fried foods is highly prevalent in the Western dietary *** diet has been unfavorably linked with high risk of developing cardiovascular *** failure(HF)as a cardiovascular disease subtype is a growing global pandemic with high morbidity and ***,the causal relationship between long-term fried food consumption and incident HF remains *** population-based study revealed that frequent fried food consumption is strongly associated with 15%higher risk of *** causal relationship may be ascribed to the dietary acrylamide exposure in fried *** cross-sectional study evidenced that acrylamide exposure is associated with an increased risk of ***,we discover and demonstrate that chronic acrylamide exposure may induce HF in zebrafish and ***,we reveal that acrylamide induces energy metabolism disturbance in heart due to the mitochondria dysfunction and metabolic ***,acrylamide exposure induces myocardial apoptosis via inhibiting NOTCH1-phosphatidylinositol 3-kinase/AKT *** addition,acrylamide exposure could affect heart development during early life stage,and the adverse effect of acrylamide exposure is a threat for next generation via epigenetic change evoked by DNA methyltransferase 1(DNMT1).In this study,we reveal the adverse effects and underlying mechanism of fried foods and acrylamide as a typical food processing contaminant on HF from population-based observations to experimental ***,these results both epidemiologically and mechanistically provide strong evidence to unravel the mechanism of acrylamide-triggered HF and highlight the significance of reducing fried food consumption for lower the risk of HF.
Due to their resistance to degradation,wide distribution,easy diffusion and potential uptake by organisms,microplastics(MPs)pollution has become a major environmental *** this study,PEG-modified Fe_(3)O_(4)magnetic na...
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Due to their resistance to degradation,wide distribution,easy diffusion and potential uptake by organisms,microplastics(MPs)pollution has become a major environmental *** this study,PEG-modified Fe_(3)O_(4)magnetic nanoparticles demonstrated superior adsorption efficiency against polyethylene(PE)microspheres compared to other adsorbents(bare Fe_(3)O_(4),PEI/Fe_(3)O_(4)and CA/Fe_(3)O_(4)).Themaximumadsorption capacity of PEwas found to be 2203 mg/g by adsorption isotherm ***/Fe_(3)O_(4)maintained a high adsorption capacity even at low temperature(5℃,2163 mg/g),while neutral pH was favorable for MP *** presence of anions(Cl^(-),SO_(4)^(2-),HCO_(3)^(-),NO_(3)^(-))and of humic acids inhibited the adsorption of *** is proposed that the adsorption process was mainly driven by intermolecular hydrogen ***,the study demonstrated that PEG/Fe_(3)O_(4)can potentially be used as an efficient control against MPs,thus improving the quality of the aquatic environment and of our water resources.
Optimizing frequency configurations for qubits and gates in superconducting quantum chips presents a complex NP-complete challenge,critical for mitigating decoherence and *** paper introduces a neural network-based ap...
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Optimizing frequency configurations for qubits and gates in superconducting quantum chips presents a complex NP-complete challenge,critical for mitigating decoherence and *** paper introduces a neural network-based approach,leveraging the network as a surrogate model to predict frequency *** method employs a closed-loop Bayesian optimization framework to iteratively refine configurations,guided by the network’s knowledge of nonlinear error *** focusing on localized chip windows,the optimization identifies optimal frequency settings that minimize *** approach is validated through randomized and cross-entropy benchmarking,showing improved energy calculations when optimizing frequency configurations for a crosstalkaware hardware-efficient ansatz in variational quantum eigensolvers on superconducting quantum chips.
In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems,...
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In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems, which will relieve the burden on end-users across all industry sectors by featuring AI-enhanced functionalities, such as personalized and automated in-database AI-powered analytics, and selfdriving capabilities for improved system performance. In this paper, we explore the evolution of data systems with a focus on deepening the fusion of AI and DB. We present NeurDB, an AI-powered autonomous data system designed to fully embrace AI design in each major system component and provide in-database AI-powered analytics. We outline the conceptual and architectural overview of NeurDB, discuss its design choices and key components, and report its current development and future plan.
Incorporating self-healing and recyclable capabilities into microwave absorbing materials is expected to facilitate the life extension,cost reduction,and performance stability,thereby meeting the practical *** this re...
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Incorporating self-healing and recyclable capabilities into microwave absorbing materials is expected to facilitate the life extension,cost reduction,and performance stability,thereby meeting the practical *** this research,a recycling and room-temperature self-healing electromagnetic wave(EMW)absorber is designed,in which linear polyurethane cross-linked by aromatic disulfide bonds is used as healable matrix,and tubular carbon nanofibers(TCNFs)are employed to attenuate *** resultant composites with a TCNFs content of 7 wt.%harvest a minimum reflection loss(RLmin)of−39.0 dB and an effective absorption bandwidth(EAB)of 2.9 GHz at a matching thickness of 4.0 *** by the reversible dynamic bonds including hydrogen bonds and aromatic disulfide bonds,the high healing efficiency of 88.7%at 25°C and 93.2%at 60°C is ***,even after three repairing cycles at room temperature,a healable efficiency of 86.4%is acquired,and RLmin can still reach−39.1 dB at the same thickness,together with an EAB of 3.0 ***,the results of solvent recycling experiment manifest that the recycled specimen achieves the almost similar mechanical and microwave dissipation properties as original *** attractive characteristics make the designed self-healing and recyclable composites promising for next-generation EMW consumption devices.
The proportionate recursive least squares(PRLS)algorithm has shown faster convergence and better performance than both proportionate updating(PU)mechanism based least mean squares(LMS)algorithms and RLS algorithms wit...
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The proportionate recursive least squares(PRLS)algorithm has shown faster convergence and better performance than both proportionate updating(PU)mechanism based least mean squares(LMS)algorithms and RLS algorithms with a sparse regularization *** this paper,we propose a variable forgetting factor(VFF)PRLS algorithm with a sparse penalty,e.g.,l_(1)-norm,for sparse *** reduce the computation complexity of the proposed algorithm,a fast implementation method based on dichotomous coordinate descent(DCD)algorithm is also *** results indicate superior performance of the proposed algorithm.
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