We present a novel efficient approach in calculating induced transmembrane voltage（ITV） on cells based on transformation optics. As cell membrane is much thinner than the dimension of a typical cell, discretizing th...We present a novel efficient approach in calculating induced transmembrane voltage（ITV） on cells based on transformation optics. As cell membrane is much thinner than the dimension of a typical cell, discretizing the membrane needs numerous meshes. Using an anisotropic medium based on transformation optics, the thickness of the membrane can be exaggerated by at least one order, which eliminates rigorous mesh refinement and reduces unknowns greatly. The accuracy and efficiency of the proposed method are verified by a cylindrical cell model. Moreover, the influence on ITV with bound water（BW） layers is also studied. The results show that when cells are exposed to nanosecond electric field, BW layers should be rigorously considered in calculating ITV.展开更多
The gravity coupling of the symmetric space sigma model is studied in the solvable Lie algebra parametrization. The corresponding Einstein equations are derived and the energy-momentum tensor is calculated. The result...The gravity coupling of the symmetric space sigma model is studied in the solvable Lie algebra parametrization. The corresponding Einstein equations are derived and the energy-momentum tensor is calculated. The results are used to derive the dynamical equations of the warped five-dimensional （5D） geometry for localized bulk scalar interactions in the framework of thick brane world models. The Einstein and scalar field equations are derived for flat brane geometry in the context of minimal and non-minimal gravity-bulk scalar couplings.展开更多
This paper investigates the resonant frequencies of the massless scalar field in the near extremal Kerr-like black-brane spacetime. It is shown that the different angular quantum number will present different resonant...This paper investigates the resonant frequencies of the massless scalar field in the near extremal Kerr-like black-brane spacetime. It is shown that the different angular quantum number will present different resonant frequencies. It is also shown that the real part of the resonant frequencies increases as the compact dimensions parameter μi increases, but the magnitude of the imaginary part decreases as μi increases.展开更多
The energy--momentum tensor, which is coordinate-independent, is used to calculate energy, momentum and angular momentum of two different tetrad fields. Although, the two tetrad fields reproduce the same space--time t...The energy--momentum tensor, which is coordinate-independent, is used to calculate energy, momentum and angular momentum of two different tetrad fields. Although, the two tetrad fields reproduce the same space--time their energies are different. Therefore, a regularized expression of the gravitational energy--momentum tensor of the teleparallel equivalent of general relativity （TEGR）, is used to make the energies of the two tetrad fields equal. The definition of the gravitational energy--momentum is used to investigate the energy within the external event horizon. The components of angular momentum associated with these space--times are calculated. In spite of using a static space--time, we get a non-zero component of angular momentum! Therefore, we derive the Killing vectors associated with these space--times using the definition of the Lie derivative of a second rank tensor in the framework of the TEGR to make the picture more clear.展开更多
By making use of the C-mapping topological current theory, this paper shows that the Gauss Bonnet Chern density （the Euler-Poincare characteristic x（M） density） can be expressed in terms of a smooth vector field ...By making use of the C-mapping topological current theory, this paper shows that the Gauss Bonnet Chern density （the Euler-Poincare characteristic x（M） density） can be expressed in terms of a smooth vector field φ and take the form of δ（φ）, which means that only the zeros of φ contribute to x（M）. This is the elementary fact of the Hopf theorem. Furthermore, it presents that a new topological tensor current of p-branes can be derived from the Gauss-Bonnet-Chern density. Using this topological current, it obtains the generalized Nambu action for multi p-branes.展开更多
By generalizing the topological current of Abelian Chern Simons （CS） vortices, we present a topological tensor current of CS p-branes based on the φ-mapping topological current theory. It is revealed that CS p-bran...By generalizing the topological current of Abelian Chern Simons （CS） vortices, we present a topological tensor current of CS p-branes based on the φ-mapping topological current theory. It is revealed that CS p-branes are located at the isolated zeros of the vector field φ（x）, and the topological structure of CS p-branes is characterized by the winding number of the φ-mappings. Furthermore, the Nambu-Goto action and the equation of motion for multi CS p-branes are obtained.展开更多
We investigate the localization of a five-dimensional vector field on a pure geometrical thick brahe. By introducing two types of interactions between the vector field and the background scalar field, we obtain a typi...We investigate the localization of a five-dimensional vector field on a pure geometrical thick brahe. By introducing two types of interactions between the vector field and the background scalar field, we obtain a typical volcano potential for the first type of coupling and a Posehl-Teller potential for the second one. These two types of couplings guarantee that the vector zero mode can be localized on the pure geometrical thick brahe under certain conditions.展开更多
We calculate the long-range Van der Waals force and the photoelectric cross section in a noncommutative setup. It is argued that non-commutativity effects could not be discerned for the Van der Waals interactions. The...We calculate the long-range Van der Waals force and the photoelectric cross section in a noncommutative setup. It is argued that non-commutativity effects could not be discerned for the Van der Waals interactions. The result for the photoelectric effect shows deviation from the usual commutative one, which in principle can be used to put bounds on the space-space non-commutativity parameter.展开更多
目的探讨在三七皂苷(panax notoginseng saponins,Pn S)Rg1干预下,肝纤维化大鼠线粒体质子跨膜转运的变化和肝线粒体膜的流动性的变化,为开发三七单体Rg1在临床抗纤维化的应用提供详尽的试验依据和理论基础。方法 72只Wistar大鼠随机分...目的探讨在三七皂苷(panax notoginseng saponins,Pn S)Rg1干预下,肝纤维化大鼠线粒体质子跨膜转运的变化和肝线粒体膜的流动性的变化,为开发三七单体Rg1在临床抗纤维化的应用提供详尽的试验依据和理论基础。方法 72只Wistar大鼠随机分为对照组、四氯化碳(carbon tetrachloride,CCl4)肝纤维化大鼠模型组、Pn S Rg1组各24只。除对照组外,其余2组用5%CCl4橄榄油按5 m L/kg灌胃制作肝纤维化大鼠模型。Pn S Rg1组在每次CCl4灌胃同时腹腔注射Pn S Rg1(5 mg/kg)用稳态荧光探针标记技术动态观察肝纤维化大鼠线粒体质子跨膜转运的变化,用荧光偏振法测定肝线粒体膜的流动性和膜的微黏度的改变。结果 (1)与对照组相比,肝纤维化模型组大鼠用单因素多组间方差分析,发现模型组大鼠质子跨膜转运中,肝线粒体质子跨膜转运能力显著下降(P<0.01)。Pn S Rg1组与对照组相比质子跨膜转运的变化没有显著性意义(P>0.05),与模型组相比,有显著性差异(P<0.01)。(2)肝纤维化模型组大鼠用单因素多组间方差分析,与对照组相比,证实模型组大鼠线粒体膜的流动性显著下降(P<0.01),增加膜的微黏度(P<0.01);而Rg1组与模型组相比增加线粒体膜的流动性(P<0.01),降低膜的微黏度(P<0.01)。结论肝纤维化大鼠肝线粒体质子跨膜转运能力下降和线粒体膜的流动性显著下降是导致肝纤维化的重要原因之一。Pn S Rg1通过增加肝线粒体质子跨膜转运能力和线粒体膜的流动性而防治肝纤维化的发生发展的。展开更多
基金Project supported by the National Key Basic Research Program of China(Grant Nos.2013CB328900 and 2013CB328905)
文摘We present a novel efficient approach in calculating induced transmembrane voltage（ITV） on cells based on transformation optics. As cell membrane is much thinner than the dimension of a typical cell, discretizing the membrane needs numerous meshes. Using an anisotropic medium based on transformation optics, the thickness of the membrane can be exaggerated by at least one order, which eliminates rigorous mesh refinement and reduces unknowns greatly. The accuracy and efficiency of the proposed method are verified by a cylindrical cell model. Moreover, the influence on ITV with bound water（BW） layers is also studied. The results show that when cells are exposed to nanosecond electric field, BW layers should be rigorously considered in calculating ITV.
文摘The gravity coupling of the symmetric space sigma model is studied in the solvable Lie algebra parametrization. The corresponding Einstein equations are derived and the energy-momentum tensor is calculated. The results are used to derive the dynamical equations of the warped five-dimensional （5D） geometry for localized bulk scalar interactions in the framework of thick brane world models. The Einstein and scalar field equations are derived for flat brane geometry in the context of minimal and non-minimal gravity-bulk scalar couplings.
基金Project supported by the National Natural Science Foundation of China (Grant No 10675045)the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No 200317)
文摘This paper investigates the resonant frequencies of the massless scalar field in the near extremal Kerr-like black-brane spacetime. It is shown that the different angular quantum number will present different resonant frequencies. It is also shown that the real part of the resonant frequencies increases as the compact dimensions parameter μi increases, but the magnitude of the imaginary part decreases as μi increases.
文摘The energy--momentum tensor, which is coordinate-independent, is used to calculate energy, momentum and angular momentum of two different tetrad fields. Although, the two tetrad fields reproduce the same space--time their energies are different. Therefore, a regularized expression of the gravitational energy--momentum tensor of the teleparallel equivalent of general relativity （TEGR）, is used to make the energies of the two tetrad fields equal. The definition of the gravitational energy--momentum is used to investigate the energy within the external event horizon. The components of angular momentum associated with these space--times are calculated. In spite of using a static space--time, we get a non-zero component of angular momentum! Therefore, we derive the Killing vectors associated with these space--times using the definition of the Lie derivative of a second rank tensor in the framework of the TEGR to make the picture more clear.
基金Project supported by the National Natural Science Foundation of China (Grant No 10475034)
文摘By making use of the C-mapping topological current theory, this paper shows that the Gauss Bonnet Chern density （the Euler-Poincare characteristic x（M） density） can be expressed in terms of a smooth vector field φ and take the form of δ（φ）, which means that only the zeros of φ contribute to x（M）. This is the elementary fact of the Hopf theorem. Furthermore, it presents that a new topological tensor current of p-branes can be derived from the Gauss-Bonnet-Chern density. Using this topological current, it obtains the generalized Nambu action for multi p-branes.
基金Project supported by the National Natural Science Foundation of China （Grant No 10475034）.
文摘By generalizing the topological current of Abelian Chern Simons （CS） vortices, we present a topological tensor current of CS p-branes based on the φ-mapping topological current theory. It is revealed that CS p-branes are located at the isolated zeros of the vector field φ（x）, and the topological structure of CS p-branes is characterized by the winding number of the φ-mappings. Furthermore, the Nambu-Goto action and the equation of motion for multi CS p-branes are obtained.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11522541 and 11375075the Fundamental Research Funds for the Central Universities under Grant Nos lzujbky-2016-k04 and lzujbky-2014-31
文摘We investigate the localization of a five-dimensional vector field on a pure geometrical thick brahe. By introducing two types of interactions between the vector field and the background scalar field, we obtain a typical volcano potential for the first type of coupling and a Posehl-Teller potential for the second one. These two types of couplings guarantee that the vector zero mode can be localized on the pure geometrical thick brahe under certain conditions.
基金Supported by the National Natural Science Foundation of China under Grant No 10575026.
文摘We calculate the long-range Van der Waals force and the photoelectric cross section in a noncommutative setup. It is argued that non-commutativity effects could not be discerned for the Van der Waals interactions. The result for the photoelectric effect shows deviation from the usual commutative one, which in principle can be used to put bounds on the space-space non-commutativity parameter.
文摘目的探讨在三七皂苷(panax notoginseng saponins,Pn S)Rg1干预下,肝纤维化大鼠线粒体质子跨膜转运的变化和肝线粒体膜的流动性的变化,为开发三七单体Rg1在临床抗纤维化的应用提供详尽的试验依据和理论基础。方法 72只Wistar大鼠随机分为对照组、四氯化碳(carbon tetrachloride,CCl4)肝纤维化大鼠模型组、Pn S Rg1组各24只。除对照组外,其余2组用5%CCl4橄榄油按5 m L/kg灌胃制作肝纤维化大鼠模型。Pn S Rg1组在每次CCl4灌胃同时腹腔注射Pn S Rg1(5 mg/kg)用稳态荧光探针标记技术动态观察肝纤维化大鼠线粒体质子跨膜转运的变化,用荧光偏振法测定肝线粒体膜的流动性和膜的微黏度的改变。结果 (1)与对照组相比,肝纤维化模型组大鼠用单因素多组间方差分析,发现模型组大鼠质子跨膜转运中,肝线粒体质子跨膜转运能力显著下降(P<0.01)。Pn S Rg1组与对照组相比质子跨膜转运的变化没有显著性意义(P>0.05),与模型组相比,有显著性差异(P<0.01)。(2)肝纤维化模型组大鼠用单因素多组间方差分析,与对照组相比,证实模型组大鼠线粒体膜的流动性显著下降(P<0.01),增加膜的微黏度(P<0.01);而Rg1组与模型组相比增加线粒体膜的流动性(P<0.01),降低膜的微黏度(P<0.01)。结论肝纤维化大鼠肝线粒体质子跨膜转运能力下降和线粒体膜的流动性显著下降是导致肝纤维化的重要原因之一。Pn S Rg1通过增加肝线粒体质子跨膜转运能力和线粒体膜的流动性而防治肝纤维化的发生发展的。
