采用多输入多输出(M IM O)技术是军用移动通信发展的必然趋势。然而,实际的M IM O天线之间是相关的,这种相关性会降低M IM O的性能。通过在发射端发送训练序列,采用自适应方法,在接收端可以将M IM O相关系数提取出来。仿真结果表明,分...采用多输入多输出(M IM O)技术是军用移动通信发展的必然趋势。然而,实际的M IM O天线之间是相关的,这种相关性会降低M IM O的性能。通过在发射端发送训练序列,采用自适应方法,在接收端可以将M IM O相关系数提取出来。仿真结果表明,分离出的相关系数能够非常接近实际的相关系数。因而,采用这种方法可以比较好的去除天线之间的相关性,可以使M IM O技术有效的应用在军用移动通信中。展开更多
Molecular frame photoemission is a very sensitive probe of the photoionization （PI） dynamics of molecules. This paper reports a comparative study of non-resonant and resonant photoionization of D2 induced by VUV cir...Molecular frame photoemission is a very sensitive probe of the photoionization （PI） dynamics of molecules. This paper reports a comparative study of non-resonant and resonant photoionization of D2 induced by VUV circularly polarized synchrotron radiation at SOLEIL at the level of the molecular frame photoelectron angular distributions （MFPADs）. We use the vector correlation method which combines imaging and time-of-flight resolved electron-ion coincidence techniques, and a generalized formalism for the expression of the Ⅰ（χ, θe, Фe） MFPADs, where χ is the orientation of the molecular axis with respect to the light quantization axis and （θe, Фe） the electron emission direction in the molecular frame. Selected MFPADs for a molecule aligned parallel or perpendicular to linearly polarized light, or perpendicular to the propagation axis of circularly polarized light, are presented for dissociative photoionization （DPI） of D2 at two photon excitation energies, hv=19 eV, where direct PI is the only channel opened, and hv=32.5 eV, i.e. in the region involving resonant excitation of Q1 and Q2 doubly excited state series. We discuss in particular the properties of the circular dichroism characterizing photoemission in the molecular frame for direct and resonant PI. In the latter case, a remarkable behavior is observed which may be attributed to the interference occurring between undistinguishable autoionization decay channels.展开更多
To investigate the status of mineral metabolism in people residing in huge regional centers of north-western and north-eastern parts of Russia by AES-IBP （atom-emission spectrometry with inductively bonded argon pla...To investigate the status of mineral metabolism in people residing in huge regional centers of north-western and north-eastern parts of Russia by AES-IBP （atom-emission spectrometry with inductively bonded argon plasma）, the content of 25 elements in hair samples of surveyed people was examined. The results of the study carried out in Russia＇s north could testify to significant deformation found in the elderly people bodies＇ element profiles. The pronounced deficit in such essential elements as Ca, Cr, Mg can be considered the common north-related profile typical for the elderly people from European and Asian north. In addition, age-related formation of all the elements＇ deficit due to their risen spending at pathologies as well as the increased need in such elements as Zn, Se, Cr, Cu, Mn. The age-related excess of arsenic proved to be typical for Magadan residents. In Anadyr, the age-related excess of lead was found, in Petrozavodsk mercury, and in Arkhangelsk--boron and aluminium.展开更多
文摘采用多输入多输出(M IM O)技术是军用移动通信发展的必然趋势。然而,实际的M IM O天线之间是相关的,这种相关性会降低M IM O的性能。通过在发射端发送训练序列,采用自适应方法,在接收端可以将M IM O相关系数提取出来。仿真结果表明,分离出的相关系数能够非常接近实际的相关系数。因而,采用这种方法可以比较好的去除天线之间的相关性,可以使M IM O技术有效的应用在军用移动通信中。
文摘Molecular frame photoemission is a very sensitive probe of the photoionization （PI） dynamics of molecules. This paper reports a comparative study of non-resonant and resonant photoionization of D2 induced by VUV circularly polarized synchrotron radiation at SOLEIL at the level of the molecular frame photoelectron angular distributions （MFPADs）. We use the vector correlation method which combines imaging and time-of-flight resolved electron-ion coincidence techniques, and a generalized formalism for the expression of the Ⅰ（χ, θe, Фe） MFPADs, where χ is the orientation of the molecular axis with respect to the light quantization axis and （θe, Фe） the electron emission direction in the molecular frame. Selected MFPADs for a molecule aligned parallel or perpendicular to linearly polarized light, or perpendicular to the propagation axis of circularly polarized light, are presented for dissociative photoionization （DPI） of D2 at two photon excitation energies, hv=19 eV, where direct PI is the only channel opened, and hv=32.5 eV, i.e. in the region involving resonant excitation of Q1 and Q2 doubly excited state series. We discuss in particular the properties of the circular dichroism characterizing photoemission in the molecular frame for direct and resonant PI. In the latter case, a remarkable behavior is observed which may be attributed to the interference occurring between undistinguishable autoionization decay channels.
文摘To investigate the status of mineral metabolism in people residing in huge regional centers of north-western and north-eastern parts of Russia by AES-IBP （atom-emission spectrometry with inductively bonded argon plasma）, the content of 25 elements in hair samples of surveyed people was examined. The results of the study carried out in Russia＇s north could testify to significant deformation found in the elderly people bodies＇ element profiles. The pronounced deficit in such essential elements as Ca, Cr, Mg can be considered the common north-related profile typical for the elderly people from European and Asian north. In addition, age-related formation of all the elements＇ deficit due to their risen spending at pathologies as well as the increased need in such elements as Zn, Se, Cr, Cu, Mn. The age-related excess of arsenic proved to be typical for Magadan residents. In Anadyr, the age-related excess of lead was found, in Petrozavodsk mercury, and in Arkhangelsk--boron and aluminium.
