提出了一种基于局域能量逐层提取的局域均值分解(Local Mean Decomposition,LMD)模态混叠抑制方法。对待分析信号利用LMD得到一系列乘积函数(Product Function,PF),对各PF的能量进行积分,根据积分比值确定模态混叠导致的能量泄漏程度,...提出了一种基于局域能量逐层提取的局域均值分解(Local Mean Decomposition,LMD)模态混叠抑制方法。对待分析信号利用LMD得到一系列乘积函数(Product Function,PF),对各PF的能量进行积分,根据积分比值确定模态混叠导致的能量泄漏程度,并从具有模态混叠的高阶PF中移除下一阶PF的成分构成新的PF,从原始信号中减去新的PF得到新的待处理信号,继续执行LMD,直到所有PF频率成分各自独立,从而实现对模态混叠的抑制。仿真结果表明:算法可以有效抑制小频率比混合信号导致的模态混叠,在实际工程上具有一定推广应用价值。展开更多
The dynamics of quantum entanglement described by the yon Neumann entropy is studied for the localized states of Fermi-resonance coupling vibrations in molecule CS2, where the interacting energy between the stretching...The dynamics of quantum entanglement described by the yon Neumann entropy is studied for the localized states of Fermi-resonance coupling vibrations in molecule CS2, where the interacting energy between the stretching and the bending modes is considered to establish a connection between entanglement and energy. It is shown that entanglement reveals dominant anti-correlation with the interacting energy for the stretch-localized state, while that exhibits dominantly positive correlation for the bend-localized state. The entanglement and the energy for the dislocalized states are discussed as well. Those are useful for molecular quantum computing and quantum information in high dimensional states.展开更多
A modified Olami Feder-Christensen model of self-organized criticality on a square lattice with the properties of small world networks has been studied.We find that our model displays power-law behavior and the expone...A modified Olami Feder-Christensen model of self-organized criticality on a square lattice with the properties of small world networks has been studied.We find that our model displays power-law behavior and the exponent τ of the model depends on φ,the density of long-range connections in our network.展开更多
Silver nanoparticles(Ag NPs)are synthesized with chemical method,which are introduced into the traditional organic photovoltaic(OPV)structure.The experimental results show that both the optical and photoelectric prope...Silver nanoparticles(Ag NPs)are synthesized with chemical method,which are introduced into the traditional organic photovoltaic(OPV)structure.The experimental results show that both the optical and photoelectric properties are en-hanced because of localized surface plasmon(LSP)effects of Ag NPs.The advantage of adding Ag NPs behind active layer in incident direction is discussed.We believe this route can avoid absorption shadow and enhance the reusing of transmitted light of active layer.The average short-circuit current(J SC)of the optimum device can be raised from 9.23mA/cm2 to 10.84mA/cm2,and the energy converting efficiency(PCE)can be raised from 3.22% to 3.85%.展开更多
文摘提出了一种基于局域能量逐层提取的局域均值分解(Local Mean Decomposition,LMD)模态混叠抑制方法。对待分析信号利用LMD得到一系列乘积函数(Product Function,PF),对各PF的能量进行积分,根据积分比值确定模态混叠导致的能量泄漏程度,并从具有模态混叠的高阶PF中移除下一阶PF的成分构成新的PF,从原始信号中减去新的PF得到新的待处理信号,继续执行LMD,直到所有PF频率成分各自独立,从而实现对模态混叠的抑制。仿真结果表明:算法可以有效抑制小频率比混合信号导致的模态混叠,在实际工程上具有一定推广应用价值。
基金This work was supported by the National Natural Science Foundation of China （No.11174099）.
文摘The dynamics of quantum entanglement described by the yon Neumann entropy is studied for the localized states of Fermi-resonance coupling vibrations in molecule CS2, where the interacting energy between the stretching and the bending modes is considered to establish a connection between entanglement and energy. It is shown that entanglement reveals dominant anti-correlation with the interacting energy for the stretch-localized state, while that exhibits dominantly positive correlation for the bend-localized state. The entanglement and the energy for the dislocalized states are discussed as well. Those are useful for molecular quantum computing and quantum information in high dimensional states.
文摘A modified Olami Feder-Christensen model of self-organized criticality on a square lattice with the properties of small world networks has been studied.We find that our model displays power-law behavior and the exponent τ of the model depends on φ,the density of long-range connections in our network.
基金supported by the National Natural Science Foundation of China(Nos.60876046and60976048)the Tianjin Natural Science Foundation(Nos.10ZCKFGX01900,10SYSYJC28100and12JCQNJC01300)+1 种基金the Scientific Developing Foundation of Tianjin Education Commission(No.20100723)the Tianjin Key Discipline of Material Physics and Chemistry
文摘Silver nanoparticles(Ag NPs)are synthesized with chemical method,which are introduced into the traditional organic photovoltaic(OPV)structure.The experimental results show that both the optical and photoelectric properties are en-hanced because of localized surface plasmon(LSP)effects of Ag NPs.The advantage of adding Ag NPs behind active layer in incident direction is discussed.We believe this route can avoid absorption shadow and enhance the reusing of transmitted light of active layer.The average short-circuit current(J SC)of the optimum device can be raised from 9.23mA/cm2 to 10.84mA/cm2,and the energy converting efficiency(PCE)can be raised from 3.22% to 3.85%.
