Solid oxide electrolysis cell(SOEC)is a promising water electrolysis technology that produces hydrogen or syngas through water electrolysis or water and carbon dioxide *** hydrogen or syngas can be produced by SOEC wi...
详细信息
Solid oxide electrolysis cell(SOEC)is a promising water electrolysis technology that produces hydrogen or syngas through water electrolysis or water and carbon dioxide *** hydrogen or syngas can be produced by SOEC with renewable ***,SOEC has attracted continuous attention in recent years for the urgency of developing environmentally friendly energy sources and achieving carbon *** on 1276 related articles retrieved from the Web of science(WoS)database,the historical development of SOECs are depicted from 1983 to 2023 in this *** co-occurrence networks of the countries,source journals,and author keywords are ***,three main clusters showing different content of the SOEC research are identified and ***,the scientometric analysis and the content of the high-cited articles of the research of different topics of SOECs:fuel electrode,air electrode,electrolyte,co-electrolysis,proton-conducting SOECs,and the modeling of SOECs are also *** results show that co-electrolysis and proton-conducting SOECs are two popular directions in the study of *** paper provides a straightforward reference for researchers interested in the field of SOEC research,helping them navigate the landscape of this area of study,locate potential partners,secure funding,discover influential scholars,identify leading countries,and access key research publications.
Hot isostatic pressing(HIP)temperature has a significant impact on the service performance of powder metallurgy titanium *** this study,a high-temperature titanium alloy,Ti-6.5Al-3.5Mo-1.5Zr-0.3Si,was prepared under d...
详细信息
Hot isostatic pressing(HIP)temperature has a significant impact on the service performance of powder metallurgy titanium *** this study,a high-temperature titanium alloy,Ti-6.5Al-3.5Mo-1.5Zr-0.3Si,was prepared under different HIP temperatures(880-1000℃),and the microstructural evolution and mechanical properties were systematically *** results demonstrated that the HIPed alloys were predominantly composed of more than 80 vol.％ α phase and a small amount of β phase,and their phase compositions were basically unaffected by the HIP *** the typical single-temperature-maintained HIP(STM-HIP)regime,the microstructure of alloy significantly coarsened as the HIP temperature increased,and the alloy strength exhibited an obvious linear negative correlation with the HIP *** the basis of Hall-Petch relation,the prediction model of grain size was established,and the mathematical equation between HIP tem-perature and grain size(d=M(THIP-N)-2)was ***,a possible evolution mechanism of microstructure was proposed,which could be divided into the decomposition of initial α' martensite for as-received powder,formation of the globular α grains in prior particle boundaries(PPBs)region,and precipitation of the platelet α grains in non-PPBs *** these alloys prepared by the dual-temperature-maintained HIP(DTM-HIP)regime,although their tensile properties were comparable to that of alloy prepared by STM-HIP regime with same high-temperature holding stage,higher proportion of globular α grains occurred due to more recrystallization nucleation during the low-temperature holding stage,which prob-ably provided a solution for improving the dynamic service performance of HIPed alloys.
Porous Titanium scaffolds have attracted widespread attention as bone implants for avoiding the stress shielding effect and promoting *** this study,multi-morphology graded scaffolds hy-bridized by Primitive and Gyroi...
详细信息
Porous Titanium scaffolds have attracted widespread attention as bone implants for avoiding the stress shielding effect and promoting *** this study,multi-morphology graded scaffolds hy-bridized by Primitive and Gyroid structures with porosity of 50,60,and 70%were designed(denoted as PG50,PG60,and PG70,respectively)and fabricated by selective laser *** simulation results showed that the maximum von-Mises stress of hybridized scaffolds increased from 504.22 to 884.24 MPa with *** permeability and average pore size of multi-morphology PG50,PG60,and PG70 were in the range of 3.58×10^(-9)-5.50×10^(-9) m^(2) and 568.1-758.4μm,*** microstructure of multi-morphology graded scaffolds consisted of a fully martensiticα′*** permeabilities of PG50 and PG60 were 3.27×10^(-9) and 4.35×10^(-9) m^(2),respectively,which were within the range of human bone(0.01-12.1×10^(-9) m^(2)).Elastic modulus and compressive yield strength of PG50 and PG60 ranged within 5.93^(-9).86 and 180.06-257.08 MPa,***,the PG50 not only exhibited a similar elastic modulus compared to human cortical bone(10.1 GPa)but also had higher strength(257.08 vs 131 MPa).The results of in vitro biocompatibility assay showed that PG50 and PG60 have better cyto-compatibility than mono-morphology scaffolds with the same *** together,PG50 is promising to be used for the restoration of bone defects due to its excellent mechanical properties,appropriate per-meability,and good cytocompatibility.
The cross-photodimerization often comes with the formation of undesired and competitive homophotodimer as side ***,we report a series of highly selective[4+4]cross-photodimerization between anthracene and 4a-azoniaant...
详细信息
The cross-photodimerization often comes with the formation of undesired and competitive homophotodimer as side ***,we report a series of highly selective[4+4]cross-photodimerization between anthracene and 4a-azoniaanthracene derivatives within a cucurbit[10]uril(CB[10])host in *** inclusion complexes were formed through encapsulation of donor(D1-D2,anthracene derivative)and acceptor(A1-A3,4a-azoniaanthracene derivatives)pairs in CB[10].In the presence of CB[10](1.0 equiv.),the[4+4]cross-photodimerization between D1 and A1/A2/A3 efficiently gave a single racemic ***,the cross-photodimerization between 9-substituted anthracene D2 and A1/A3 was catalyzed by CB[10](0.1 equiv.)to quantitatively yield a cross-photodimer with high *** formation of selective cross-photodimers could be attributed to the exclusive encapsulation of D-A hetero-guest pairs in CB[10]and the confinement effect of the CB[10]host *** study further proves host–guest complexation as a powerful strategy for cross-cycloaddition reactions with high efficiency.
Vibration-assisted grinding is one of the most promising technologies for manufacturing optical components due to its efficiency and quality ***,the damage and crack propagation mechanisms of materials in vibration-as...
详细信息
Vibration-assisted grinding is one of the most promising technologies for manufacturing optical components due to its efficiency and quality ***,the damage and crack propagation mechanisms of materials in vibration-assisted grinding are not well *** order to elucidate the mechanism of abrasive scratching during vibration-assisted grinding,a kinematic model of vibration scratching was *** influence of process parameters on the evolution of vibration scratches to indentation or straight scratches is revealed by displacement metrics and velocity ***,scratch and vibration scratch experiments were performed on quartz glass,and the results showed that the vibration scratch cracks are a combination of indentation cracks and scratch *** scratch cracks change from indentation cracks to scratch cracks as the indenter moves from the entrance to the exit of the workpiece or as the vibration frequency changes from high to low.A vertical vibration scratch stress field model is established for the first time,which reveals that the maximum principal stress and tensile stress distribution is the fundamental cause for inducing the transformation of the vibration scratch cracking *** model provides a theoretical basis for understanding of the mechanism of material damage and crack propagation during vibration-assisted grinding.
Single wall carbon nanotube(SWCNT)/Si heterojunction photodetectors have the advantages of high photoresponse ability and simple structure,however,their detection wavelength range are usually lower than 1100 nm,which ...
详细信息
Single wall carbon nanotube(SWCNT)/Si heterojunction photodetectors have the advantages of high photoresponse ability and simple structure,however,their detection wavelength range are usually lower than 1100 nm,which limits their application in the infrared *** report a SWCNT/Cu/Si photodetector with both a high photoresponse and a detection range up to the infrared band by depositing a Cu nanoparticles(NPs)layer between a SWCNT film and a n-Si *** was found that the Cu NPs produce strong surface plasmon resonance(SPR)under laser irradiation,which breaks through the limitation of Si band gap and greatly improves the photoresponse of the SWCNT/Cu/Si photodetector in the near infrared *** responsivity(R)of the photodetector in the wavelength range of 1850–1200 nm reached 2.2–14.15 mA/W,which is the highest value in the reported plasmon enhanced n-Si based photodetectors,and about 20,000 times higher than that of a SWCNT/Si *** R value for 1550 nm wavelength used in optical communications reached~8.2 mA/W,which is 64%higher than the previously reported values of commonly used *** attribute the significant increase to the strong SPR and low Schottky barrier of Cu with n-Si,which facilitates the generation and transfer of the carriers.
Terahertz metamaterial biosensors have attracted significant attention in the biological field due to their advantages of label-free,real-time and in situ *** this paper,a highly sensitive metamaterial sensor with sem...
详细信息
Terahertz metamaterial biosensors have attracted significant attention in the biological field due to their advantages of label-free,real-time and in situ *** this paper,a highly sensitive metamaterial sensor with semi-ring mirror symmetry based on toroidal dipole resonance is designed for a new metamaterial *** is shown that a refractive index sensitivity of 337.5 GHz per refractive index unit can be achieved under an analyte of saturated thickness near a 1.33 THz transmission *** biosensor samples where aflatoxin B1 is dropped on the metamaterial surface in our experiment,dip amplitudes of transmission varying from 0.1904 to 0.203 and 0.2093 are observed as aflatoxin B1 concentrations are altered from 0 to 0.001μg·ml-1 and to 0.01μg·ml-1,***,when aflatoxin B1 concentrations are 0.1μg·ml-1,1μg·ml-1,10μg·ml-1 and 100μg·ml-1,dip amplitudes of 0.2179,0.226,0.2384 and 0.2527 and dip redshifts of 10.1 GHz,20.1 GHz,27.7 GHz and 37.6 GHz are respectively *** results illustrate high-sensitivity,label-free detection of aflatoxin B1,enriching the applications of sensors in the terahertz domain.
The increasing number of orbiting satellites has motivated the development of active debris removal and on-orbit servicing missions. The KAIST Satellite technology and Research Center plans to capture and de-orbit Ko...
详细信息
Benefiting from the development of Federated Learning(FL)and distributed communication systems,large-scale intelligent applications become *** devices not only provide adequate training data,but also cause privacy lea...
详细信息
Benefiting from the development of Federated Learning(FL)and distributed communication systems,large-scale intelligent applications become *** devices not only provide adequate training data,but also cause privacy leakage and energy *** to optimize the energy consumption in distributed communication systems,while ensuring the privacy of users and model accuracy,has become an urgent *** this paper,we define the FL as a 3-layer architecture including users,agents and *** order to find a balance among model training accuracy,privacy-preserving effect,and energy consumption,we design the training process of FL as game *** use an extensive game tree to analyze the key elements that influence the players’decisions in the single game,and then find the incentive mechanism that meet the social norms through the repeated *** experimental results show that the Nash equilibrium we obtained satisfies the laws of reality,and the proposed incentive mechanism can also promote users to submit high-quality data in *** the multiple rounds of play,the incentive mechanism can help all players find the optimal strategies for energy,privacy,and accuracy of FL in distributed communication systems.
暂无评论