According to the axisymmetric heat conduction of monolayer cylinder, a general method was deduced to calculate the axisymmetric temperature of linear heat conduction multilayer cylinder. Four types of boundary conditi...According to the axisymmetric heat conduction of monolayer cylinder, a general method was deduced to calculate the axisymmetric temperature of linear heat conduction multilayer cylinder. Four types of boundary conditions were summarized and formulas for each type were derived. Then, a general calculating program was developed. Four temperature formulas could be expressed by a uniform equation, and the intermediate interface temperatures of axisymmetrical linear conduction multilayer cylinder satisfied tridiagonal linear and nonlinear systems of equations, which could be solved with the pursuit method and the Newton＇s method, respectively. With the calculating program, the temperature at any point of linear heat conduction multilayer cylinder could be obtained.展开更多
By means of the transfer matrix approach, the linear conductance spectrum for electronic transport through a T-shaped quantum waveguide is calculated. The resonant peaks and the antiresonant dips in the conductance sp...By means of the transfer matrix approach, the linear conductance spectrum for electronic transport through a T-shaped quantum waveguide is calculated. The resonant peaks and the antiresonant dips in the conductance spectrum are mainly focused. The previous prediction about their positions by other theoretical approaches is checked. In addition, a function of spin filtering is suggested based on the interplay of the resonance and antiresonance in this T-shaped quantum waveguide.展开更多
In this work,by incorporating different electrodes(Ta/Ti)onto TaOxdielectric layer,we studied both the conductance reading and conductance updating(long term potentiation and depression)linearities in the two RRAM dev...In this work,by incorporating different electrodes(Ta/Ti)onto TaOxdielectric layer,we studied both the conductance reading and conductance updating(long term potentiation and depression)linearities in the two RRAM devices.Owing to the composition modulation(CM)mechanism,the Ta-electrode device shows better conductance reading and updating linearities.The RRAM device linearities directly influence the performance of the neural network when the devices are used as synapses.System evaluation of a two-layer neural network considering the conductance reading and updating linearity factors further confirm that both the training and inference accuracies of Ta electrode device are better than those of the Ti electrode one.We believe that this work could serve as a powerful reference for engineering synaptic devices with good linearity for neuromorphic computing applications.展开更多
Since the discovery of doped polyacetylene over four decades ago,significant advances have been made in understanding charge transport and metallic behavior in linear conductive polymers[1].Traditional models emphasiz...Since the discovery of doped polyacetylene over four decades ago,significant advances have been made in understanding charge transport and metallic behavior in linear conductive polymers[1].Traditional models emphasize intrachain coupling within large conjugated systems,with charge transport occurring along the conjugated chain direction,while interchain hopping serves as a secondary conduction mechanism[2].展开更多
基金Item Sponsored by National Natural Science Foundation of China (50474014)Provincial Key Technologies Research and Development Program of Liaoning of China(2008216005)
文摘According to the axisymmetric heat conduction of monolayer cylinder, a general method was deduced to calculate the axisymmetric temperature of linear heat conduction multilayer cylinder. Four types of boundary conditions were summarized and formulas for each type were derived. Then, a general calculating program was developed. Four temperature formulas could be expressed by a uniform equation, and the intermediate interface temperatures of axisymmetrical linear conduction multilayer cylinder satisfied tridiagonal linear and nonlinear systems of equations, which could be solved with the pursuit method and the Newton＇s method, respectively. With the calculating program, the temperature at any point of linear heat conduction multilayer cylinder could be obtained.
文摘By means of the transfer matrix approach, the linear conductance spectrum for electronic transport through a T-shaped quantum waveguide is calculated. The resonant peaks and the antiresonant dips in the conductance spectrum are mainly focused. The previous prediction about their positions by other theoretical approaches is checked. In addition, a function of spin filtering is suggested based on the interplay of the resonance and antiresonance in this T-shaped quantum waveguide.
基金the National Key R&D Program of China(Grant No.2017YFB0405600)the National Natural Science Foundation of China(Grant Nos.61751401,61804171,61825404,61732020,61821091,61851402)+1 种基金the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB44000000)the Major Scientific Research Project of Zhejiang Lab(Grant No.2019KC0AD02)。
文摘In this work,by incorporating different electrodes(Ta/Ti)onto TaOxdielectric layer,we studied both the conductance reading and conductance updating(long term potentiation and depression)linearities in the two RRAM devices.Owing to the composition modulation(CM)mechanism,the Ta-electrode device shows better conductance reading and updating linearities.The RRAM device linearities directly influence the performance of the neural network when the devices are used as synapses.System evaluation of a two-layer neural network considering the conductance reading and updating linearity factors further confirm that both the training and inference accuracies of Ta electrode device are better than those of the Ti electrode one.We believe that this work could serve as a powerful reference for engineering synaptic devices with good linearity for neuromorphic computing applications.
文摘Since the discovery of doped polyacetylene over four decades ago,significant advances have been made in understanding charge transport and metallic behavior in linear conductive polymers[1].Traditional models emphasize intrachain coupling within large conjugated systems,with charge transport occurring along the conjugated chain direction,while interchain hopping serves as a secondary conduction mechanism[2].
