针对室内场景图像语义分割结果不精确、显著图粗糙的问题,提出一种基于多模态特征优化提取和双路径引导解码的网络架构(feature regulator and dual-path guidance,FG-Net)。具体来说,设计的特征调节器对每个阶段的多模态特征依次进行...针对室内场景图像语义分割结果不精确、显著图粗糙的问题,提出一种基于多模态特征优化提取和双路径引导解码的网络架构(feature regulator and dual-path guidance,FG-Net)。具体来说,设计的特征调节器对每个阶段的多模态特征依次进行噪声过滤、重加权表示、差异性互补和交互融合,通过强化RGB和深度特征聚合,优化特征提取过程中的多模态特征表示。然后,在解码阶段引入特征交互融合后丰富的跨模态线索,进一步发挥多模态特征的优势。结合双路径协同引导结构,在解码阶段融合多尺度、多层次的特征信息,从而输出更细致的显著图。实验在公开数据集NYUD-v2和SUN RGB-D上进行,在主要评价指标mIoU上达到48.5%,优于其他先进算法。结果表明,该算法实现了更精细的室内场景图像语义分割,表现出了较好的泛化性和鲁棒性。展开更多
The effect of autapse on adjusting the membrane of potentials of neuron is described by imposing a time-delayed feedback on the membrane of neuron in a close loop type,and the Hindmarsh-Rose(HR)neuron under autapse is...The effect of autapse on adjusting the membrane of potentials of neuron is described by imposing a time-delayed feedback on the membrane of neuron in a close loop type,and the Hindmarsh-Rose(HR)neuron under autapse is investigated.Firstly,the electric activity of single HR neuron under electric autapse and chemical autapse is investigated.It is found that quiescent neuron is activated due to appropriate time delay and feedback gain in the autapse,and the autapse plays an important role in waking up neuron.The parameter region for periodic,chaotic activity of neuron under autapse is calculated in a numerical way,and transition from spiking to bursting is observed by increasing the feedback gain and time delay carefully.Furthermore,the collective electric activities of neurons in a ring network is investigated and abundant electric activities are observed due to the competition between the autapse and the time-delayed coupling between adjacent neurons in the network,and time delay in coupling between neurons also plays an important role in enhancing synchronization in the network.展开更多
As an exploration of electromagnetic induction effects on homeostatic regulation of sleep wake cycle, a magnetic flux term coupled with membrane current is proposed as an equivalent induction current act on a physiolo...As an exploration of electromagnetic induction effects on homeostatic regulation of sleep wake cycle, a magnetic flux term coupled with membrane current is proposed as an equivalent induction current act on a physiologically-motivated mathematical model, to study the effects of electromagnetic induction and its noise on the sleep wake cycle. The basic model includes 2 simplified Hodgkin-Huxley type neurons connected via glutamate(Glu) synapses, one of which additionally contains hypocretin/orexin(Hcrt/ox) as the functionally relevant co-transmitter. The numerical results suggest that when a constant current(DC) stimulus is applied to the model, the average fire frequency of the Hcrt/ox neuron could be modified from gamma to delta frequency with increased the intensity of electromagnetic induction, but the local Glu neuron transforms active into sleep state.Additionally, the homeostatic regulation function has better robustness to electromagnetic induction and its noise than the current or conductance noise, even there is a similar stochastic resonance phenomenon. For the circadian current input case, the time of wake up is delayed and fall asleep is advanced when the electromagnetic induction and its noise is considered. Furthermore, the effects of electromagnetic noise on the regulation is not significant, but only to inhibit the neuronal discharge activities and change the time of wake up and fall asleep of the Glu neuron, characterized by the sleep duration is slightly prolonged with increasing the strength of noise intensity.展开更多
A hybrid quantum architecture was proposed to engineer a localization-delocalization phase transition of light in a two-dimension square lattices of superconducting coplanar waveguide resonators,which are interconnect...A hybrid quantum architecture was proposed to engineer a localization-delocalization phase transition of light in a two-dimension square lattices of superconducting coplanar waveguide resonators,which are interconnected by current-biased Josephson junction phase qubits.We find that the competition between the on-site repulsion and the nonlocal photonic hopping leads to the Mott insulator-superfluid transition.By using the mean-field approach and the quantum master equation,the phase boundary between these two different phases could be obtained when the dissipative effects of superconducting resonators and phase qubit are considered.The good tunability of the effective on-site repulsion and photon-hopping strengths enable quantum simulation on condensed matter physics and many-body models using such a superconducting resonator lattice system.The experimental feasibility is discussed using the currently available technology in the circuit QED.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.112650081137212211072099 and 11365014)
文摘The effect of autapse on adjusting the membrane of potentials of neuron is described by imposing a time-delayed feedback on the membrane of neuron in a close loop type,and the Hindmarsh-Rose(HR)neuron under autapse is investigated.Firstly,the electric activity of single HR neuron under electric autapse and chemical autapse is investigated.It is found that quiescent neuron is activated due to appropriate time delay and feedback gain in the autapse,and the autapse plays an important role in waking up neuron.The parameter region for periodic,chaotic activity of neuron under autapse is calculated in a numerical way,and transition from spiking to bursting is observed by increasing the feedback gain and time delay carefully.Furthermore,the collective electric activities of neurons in a ring network is investigated and abundant electric activities are observed due to the competition between the autapse and the time-delayed coupling between adjacent neurons in the network,and time delay in coupling between neurons also plays an important role in enhancing synchronization in the network.
基金supported by the National Natural Science Foundation of China(Grant Nos.11372122&11072099)
文摘As an exploration of electromagnetic induction effects on homeostatic regulation of sleep wake cycle, a magnetic flux term coupled with membrane current is proposed as an equivalent induction current act on a physiologically-motivated mathematical model, to study the effects of electromagnetic induction and its noise on the sleep wake cycle. The basic model includes 2 simplified Hodgkin-Huxley type neurons connected via glutamate(Glu) synapses, one of which additionally contains hypocretin/orexin(Hcrt/ox) as the functionally relevant co-transmitter. The numerical results suggest that when a constant current(DC) stimulus is applied to the model, the average fire frequency of the Hcrt/ox neuron could be modified from gamma to delta frequency with increased the intensity of electromagnetic induction, but the local Glu neuron transforms active into sleep state.Additionally, the homeostatic regulation function has better robustness to electromagnetic induction and its noise than the current or conductance noise, even there is a similar stochastic resonance phenomenon. For the circadian current input case, the time of wake up is delayed and fall asleep is advanced when the electromagnetic induction and its noise is considered. Furthermore, the effects of electromagnetic noise on the regulation is not significant, but only to inhibit the neuronal discharge activities and change the time of wake up and fall asleep of the Glu neuron, characterized by the sleep duration is slightly prolonged with increasing the strength of noise intensity.
基金supported by the National Science Foundation of China(Grant Nos.11372122,10874122 and 11074070)the Program for Excellent Talents at the University of Guangdong Province(Guangdong Teacher Letter[1010]No.79)
文摘A hybrid quantum architecture was proposed to engineer a localization-delocalization phase transition of light in a two-dimension square lattices of superconducting coplanar waveguide resonators,which are interconnected by current-biased Josephson junction phase qubits.We find that the competition between the on-site repulsion and the nonlocal photonic hopping leads to the Mott insulator-superfluid transition.By using the mean-field approach and the quantum master equation,the phase boundary between these two different phases could be obtained when the dissipative effects of superconducting resonators and phase qubit are considered.The good tunability of the effective on-site repulsion and photon-hopping strengths enable quantum simulation on condensed matter physics and many-body models using such a superconducting resonator lattice system.The experimental feasibility is discussed using the currently available technology in the circuit QED.