Dear Editor,H∞This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot *** often exist model uncertainties ...
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Dear Editor,H∞This letter develops a new framework for the robust stability and performance conditions as well as the relevant controller synthesis with respect to uncertain robot *** often exist model uncertainties between the nominal model and the real robot manipulator and disturbances. Hence, dealing with their effects plays a crucial role in leading to high tracking performances, as discussed in [1]–[5].
Achiral dielectric nanostructures provide an efficient method for discriminating left-and right-circularly polarized photons,leveraging the photothermoelectric effect.
Achiral dielectric nanostructures provide an efficient method for discriminating left-and right-circularly polarized photons,leveraging the photothermoelectric effect.
The hydrogen-bonded organic frameworks （HOFs） as a new type of porous framework materials have been widely studied in various ***,the lack of appropriate active sites,low intrinsic conductivity,and poor stability li...
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The hydrogen-bonded organic frameworks （HOFs） as a new type of porous framework materials have been widely studied in various ***,the lack of appropriate active sites,low intrinsic conductivity,and poor stability limited their performance in the field of ***,we designed two 2D metal hydrogen-bonded organic frameworks (2D–M–HOF,M=Cu2+or Ni2+) with coordination compounds based on 2,3,6,7,14,15-hexahydroxyl cyclotricatechylene and transition metal ions (Cu2+and Ni2+),*** crystal structure of 2D–Cu–HOF is determined by continuous rotation electron diffraction,indicating an undulated 2D hydrogen-bond network with interlayeredπ-π*** flexible structure of 2D–M–HOF leads to the formation of self-adaption interlayered sites,resulting in superior activity and selectivity in the electrocatalytic conversion of CO2to C2products,achieving a total Faradaic efficiency exceeding 80%due to the high-efficiency C–C *** experimental results and density functional calculations verify that the undulated 2D–M–HOF enables the energetically favorable formation of*OCCHO *** work provides a promising strategy for designing HOF catalysts in electrocatalysis and related processes.
Wastewater electrolysis cells(WECs)for decentralized wastewater treatment/reuse coupled with H_(2) production can reduce the carbon footprint associated with transportation of water,waste,and energy *** study reports ...
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Wastewater electrolysis cells(WECs)for decentralized wastewater treatment/reuse coupled with H_(2) production can reduce the carbon footprint associated with transportation of water,waste,and energy *** study reports Ir-doped NiFe_(2)O_(4)(NFI,~5 at%Ir)spinel layer with TiO_(2) overlayer(NFI/TiO_(2)),as a scalable heterojunction anode for direct electrolysis of wastewater with circumneutral pH in a single-compartment *** dilute(0.1 M)NaCl solutions,the NFI/TiO_(2) marks superior activity and selectivity for chlorine evolution reaction,outperforming the benchmark IrO_(2).Robust operation in near-neutral pH was *** including operando X-ray absorption spectroscopy unveiled crucial roles of TiO_(2) which serves both as the primary site for Cl−chemisorption and a protective layer for NFI as an ohmic *** electrolysis of NH4+-laden synthetic wastewater demonstrated that NFI/TiO_(2)not only achieves quasi-stoichiometric NH_(4)^(+)-to-N_(2)conversion,but also enhances H_(2)generation efficiency with minimal competing reactions such as reduction of dissolved oxygen and reactive *** scaled-up WEC with NFI/TiO_(2)was demonstrated for electrolysis of toilet wastewater.
In plants,sucrose represents the primary form of photoassimilated carbon,serving as the central metabolite in plant growth and *** phloem transports photoassimilated carbon,including sucrose,as well as amino acids,RNA...
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In plants,sucrose represents the primary form of photoassimilated carbon,serving as the central metabolite in plant growth and *** phloem transports photoassimilated carbon,including sucrose,as well as amino acids,RNAs,and hormones from source tissues(e.g.,mature leaves)into sink tissues(e.g.,roots and reproductive organs)(Hardtke,2023).Phloem flow is driven by the difference of the hydrostatic pressure between source and sink(Knoblauch et al.,2016).This hydrostatic pressure in the intracellular region,known as turgor pressure,is generated from water uptake in response to the solute concentration(e.g.,ions and sugars)and affects cell volume.A previous study reported that CANALIZATION-RELATED RECEPTOR-LIKE KINASE(CANAR),a leucine-rich repeat receptor-like kinase,regulates the stele area without altering cell number,suggesting that CANAR affect cell volume(Goff et al.,2023).Cell volume in the stele area is largely dependent on osmoregulation,which is crucial for maintaining water status in plants under various environmental conditions,ranging from drought to flooding(Maurel and Nacry,2020).However,the mechanism by which CANAR regulates cell volume remains unclear.
In this work, we review the challenges of data scarcity and label inefficiency in deep learning and survey efforts to overcome these challenges. Many label-efficient learning methods have been proposed, but there is s...
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Precisely designing atomic metal-nitrogen-carbon(M-N-C)catalysts with asymmetric diatomic configurations and studying their structure–activity relationships for oxygen reduction reaction(ORR)are important for zinc-ai...
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Precisely designing atomic metal-nitrogen-carbon(M-N-C)catalysts with asymmetric diatomic configurations and studying their structure–activity relationships for oxygen reduction reaction(ORR)are important for zinc-air batteries(ZABs).Herein,a dualatomic-site catalyst(DASC)with CoN_(3)S-MnN_(2)S_(2) configuration was prepared for the cathodes of *** with Co-N-C(Mn-free)and CoMn-N-C(S-free doping),CoMn-N/S-C exhibits excellent half-wave potential(0.883 V)and turnover frequency(1.54 e·s^(−1)·site^(−1)),surpassing most of the reported state-of-the-art Pt-free ORR *** CoMn-N/S-C-based ZABs achieve extremely high specific capacity(959 mAh·g^(−1))and good stability(350 h@5 mA·cm^(−2)).Density functional theory(DFT)calculation shows that the introduction of Mn and S can break the electron configuration symmetry of the original Co 3d orbital,lower the dband center of the Co site,and optimize the desorption behavior of*OH intermediate,thereby increasing the ORR activity.
作者：
俞文凯王硕飞商克谦Center for Quantum Technology Research
and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement of Ministry of EducationSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China
In the existing ghost-imaging-based cryptographic key distribution(GCKD)protocols,the cryptographic keys need to be encoded by using many modulated patterns,which undoubtedly incurs long measurement time and huge memo...
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In the existing ghost-imaging-based cryptographic key distribution(GCKD)protocols,the cryptographic keys need to be encoded by using many modulated patterns,which undoubtedly incurs long measurement time and huge memory *** this,based on snapshot compressive ghost imaging,a public network cryptographic key distribution protocol is proposed,where the cryptographic keys and joint authentication information are encrypted into several color block diagrams to guarantee *** transforms the previous single-pixel sequential multiple measurements into multi-pixel single exposure measurements,significantly reducing sampling time and memory *** simulation and experimental results demonstrate the feasibility of this protocol and its ability to detect illegal ***,it takes GCKD a big step closer to practical applications.
Recently,artificial synapses involving an electrochemical reaction of Li-ion have been attributed to have remarkable synaptic ***-terminal synaptic transistors utilizing Li-ion intercalation exhibits reliable synaptic...
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Recently,artificial synapses involving an electrochemical reaction of Li-ion have been attributed to have remarkable synaptic ***-terminal synaptic transistors utilizing Li-ion intercalation exhibits reliable synaptic characteristics by exploiting the advantage of nondistributed weight updates owing to stable ion ***,the three-terminal configurations with large and complex structures impede the crossbar array implementation required for hardware neuromorphic ***,achieving adequate synaptic performances through effective Li-ion intercalation in vertical two-terminal synaptic devices for array integration remains ***,two-terminal Au/LixCoO_(2)/Pt artificial synapses are proposed with the potential for practical implementation of hardware neural *** Au/LixCoO_(2)/Pt devices demonstrated extraordinary neuromorphic behaviors based on a progressive dearth of Li in LixCoO_(2)*** intercalation and deintercalation of Li-ion inside the films are precisely controlled over the weight control spike,resulting in improved weight control *** types of synaptic plasticity were imitated and assessed in terms of key factors such as nonlinearity,symmetricity,and dynamic ***,the LixCoO_(2)-based neuromorphic system outperformed three-terminal synaptic transistors in simulations of convolutional neural networks and multilayer perceptrons due to the high linearity and low programming *** impressive performances suggest the vertical two-terminal Au/LixCoO_(2)/Pt artificial synapses as promising candidates for hardware neural networks.
Large interfacial strains in particles are crucial for promoting bonding in cold spraying(CS),initiated ei-ther by adiabatic shear instability(ASI)due to softening prevailing over strain hardening or by hydrostatic pl...
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Large interfacial strains in particles are crucial for promoting bonding in cold spraying(CS),initiated ei-ther by adiabatic shear instability(ASI)due to softening prevailing over strain hardening or by hydrostatic plasticity,which is claimed to promote bonding even without ASI.A thorough microstructural analysis is vital to fully understand the bonding mechanisms at play during microparticle impacts and throughout the CS *** this study,the HEA CoCrFeMnNi,known for its relatively high strain hardening and resistance to softening,was selected to investigate the microstructure characteristics and bonding mech-anisms in *** study used characterization techniques covering a range of length scales,including electron channeling contrast imaging(ECCI),electron backscatter diffraction(EBSD),and high-resolution transmission microscopy(HR-TEM),to explore the microstructure characteristics of bonding and overall structure development of CoCrFeMnNi microparticles after impact in ***-TEM lamellae were prepared using focused ion beam ***,the effects of deformation field variables on microstruc-ture development were determined through finite element modeling(FEM)of microparticle *** ECCI,EBSD,and HR-TEM analyses revealed an interplay between dislocation-driven processes and twin-ning,leading to the development of four distinct deformation *** grain refine-ment occurs at the interface through continuous dynamic recrystallization(CDRX)due to high strain and temperature rise from adiabatic deformation,signs of softening,and *** the interface,a necklace-like structure of refined grains forms around grain boundaries,along with elongated grains,resulting from the coexistence of dynamic recovery and discontinuous dynamic recrystallization(DDRX)due to lower temperature rise and *** the particle or substrate interior,concurrent twinning and dislocation-mediated mechanisms refine the structure,forming straight,cur
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