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Search Results: 1 - 10 of 28363 matches for " Xiaosong Zhu "
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A Pocket Signal Detector with Smart Phone for Panel  [PDF]
Xiaosong Zhu, Shaofei Qin, Ming An, Lei Gu
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2017, DOI: 10.4236/ijcns.2017.108B030
Abstract:
With the rapid development and widespread of communication technology, signal detection has become an important part of security checking. General equipment such as spectrum analyzer and other the same are bulky, unprofessional, not portable, and expensive. To solve these problems, a POCKET signal detection equipment that can be displayed and controlled by intelligent mobile terminal is dealt in this paper, which is flexible for using Software Defined Radio which is based on integrated single chip broadband RF front-end and adopting display and control scheme which is based on intelligent mobile phone as terminal. Besides, a display and control APP that based on Android system is developed for operating Panel.
HCRS: A hybrid clothes recommender system based on user ratings and product features
Xiaosong Hu,Wen Zhu,Qing Li
Computer Science , 2014, DOI: 10.1109/ICMeCG.2013.60
Abstract: Nowadays, online clothes-selling business has become popular and extremely attractive because of its convenience and cheap-and-fine price. Good examples of these successful Web sites include Yintai.com, Vancl.com and Shop.vipshop.com which provide thousands of clothes for online shoppers. The challenge for online shoppers lies on how to find a good product from lots of options. In this article, we propose a collaborative clothes recommender for easy shopping. One of the unique features of this system is the ability to recommend clothes in terms of both user ratings and clothing attributes. Experiments in our simulation environment show that the proposed recommender can better satisfy the needs of users.
Laser-polarization-dependent photoelectron angular distributions from polar molecules
Xiaosong Zhu,Qingbin Zhang,Weiyi Hong,Peixiang Lu,Zhizhan Xu
Physics , 2011, DOI: 10.1364/OE.19.024198
Abstract: Photoelectron angular distributions (PADs) of oriented polar molecules in response to different polarized lasers are systematically investigated. It is found that the PADs of polar CO molecules show three distinct styles excited by linearly, elliptically and circularly polarized lasers respectively. In the case of elliptical polarization, a deep suppression is observed along the major axis and the distribution concentrates approximately along the minor axis. Additionally, it is also found that the concentrated distributions rotate clockwise as the ellipticity increases. Our investigation presents a method to manipulate the motion and angular distribution of photoelectrons by varying the polarization of the exciting pulses, and also implies the possibility to control the processes in laser-molecule interactions in future work.
Critical behaviors and universality classes of percolation phase transitions on two-dimensional square lattice
Yong Zhu,Ziqing Yang,Xin Zhang,Xiaosong Chen
Physics , 2015, DOI: 10.1088/0253-6102/64/2/231
Abstract: We have investigated both site and bond percolation on two dimensional lattice under the random rule and the product rule respectively. With the random rule, sites or bonds are added randomly into the lattice. From two candidates picked randomly, the site or bond with the smaller size product of two connected clusters is added when the product rule is taken. Not only the size of the largest cluster but also its size jump are studied to characterize the universality class of percolation. The finite-size scaling forms of giant cluster size and size jump are proposed and used to determine the critical exponents of percolation from Monte Carlo data. It is found that the critical exponents of both size and size jump in random site percolation are equal to that in random bond percolation. With the random rule, site and bond percolation belong to the same universality class. We obtain the critical exponents of the site percolation under the product rule, which are different from that of both random percolation and the bond percolation under the product rule. The universality class of site percolation differs different from that of bond percolation when the product rule is used.
Tomographic imaging of asymmetric molecular orbitals with a two-color multicycle laser field
Meiyan Qin,Xiaosong Zhu,Qingbin Zhang,Peixiang Lu
Physics , 2013, DOI: 10.1364/OL.37.005208
Abstract: We theoretically demonstrate a scheme for tomographic reconstruction of asymmetric molecular orbitals based on high-order harmonic generation with a two-color multicycle laser field. It is shown that by adjusting the relative phase of the two fields, the returning electrons can be forced to recollide from one direction for all the orientations of molecules. Thus the reconstruction of the asymmetric orbitals can be carried out with multicycle laser field. This releases the stringent requirement of a single-cycle pulse with a stabilized and controllable carrier-envelop phase for the tomographic imaging of asymmetric molecular orbitals.
Imprints of the molecular-orbital geometry on the high-harmonic ellipticity
Meiyan Qin,Xiaosong Zhu,Kunlong Liu,Qingbin Zhang,Peixiang Lu
Physics , 2013, DOI: 10.1364/OE.20.020181
Abstract: The influence of the orbital symmetry on the ellipticity of the high-order harmonics is investigated. It is found that the ellipticity maps have distinct shapes for the molecular orbital with different symmetry. Our analysis shows that the feature of the harmonic ellipticity map is essentially determined by the nodal structure of the nonsymmetric orbital. The results indicate that the molecular-orbital geometry is imprinted on the ellipticity of the high-order harmonics, which invites the use of ellipticity measurements as a probe of the orbital structure for polar molecules.
Broadband large-ellipticity harmonic generation with polar molecule
Meiyan Qin,Xiaosong Zhu,Qingbin Zhang,Weiyi Hong,Peixiang Lu
Physics , 2011, DOI: 10.1364/OE.19.025084
Abstract: We investigate the polarization properties of high harmonic generation from polar molecules with a linearly polarized field. It is found that elliptically polarized harmonics are observed in a wide spectral range from the plateau to the cutoff. Further analyses show that the nonsymmetric structure of the highest occupied molecular orbital is the origin of ellipticity of the harmonics. The results provide a method for generation of large-ellipticity XUV pulses, which will benefit the application of HHG as a tool of detection in materials and biology science.
Study on the Relationships Between Single Nucleotide Polymorphism of EX-FABP Gene and Slaughter and Meat Quality Traits in Chicken
Yiping Liu,Xiaoyan You,Zengrong Zhang,Xiaosong Jiang,Huarui Du,Yuewei Xie,Q. Zhu
Research Journal of Poultry Sciences , 2012,
Abstract: In this study, the single nucleotide polymorphisms of chicken EX-FABP gene were detected by PCR-SSCP method with different pairs of primers among 228 chickens from 8 populations. Results indicated that there were 5 mutation sites had been found: 645C T, 3254C T, 3266T C, 4272A G, 4282A G, the X2 test results showed that there was extremity significant difference(p<0.01) (Fragment 1) in the frequency of genotypes among breeds. Based on the detected polymorphisms, the effects of different genotypes on slaughter and meat quality traits were analyzed. The results indicated that there were significant differences between genotypes and Glu and Ash (p<0.05) (fragment 2) and significant differences between genotypes and Val (p<0.05) (fragment 8). It was concluded that the single nucleotide polymorphisms of chicken EX-FABP gene was not association with slaughter, but it was association between the polymorphisms and partial amino acid which can affect meat quality traits.
Influence of large permanent dipoles on molecular orbital tomography
Xiaosong Zhu,Meiyan Qin,Qingbin Zhang,Yang Li,Zhizhan Xu,Peixiang Lu
Physics , 2013, DOI: 10.1364/OE.21.005255
Abstract: The influence of large permanent dipoles on molecular orbital tomography via high-order harmonic generation (HHG) is investigated in this work. It is found that, owing to the modification of the angle-dependent ionization rate resulting from the Stark shift, the one-side-recollision condition for the tomographic imaging can not be satisfied even with the few-cycle driving pulses. To overcome this problem, we employ a tailored driving pulse by adding a weak low-frequency pulse to the few-cycle laser pulse to control the HHG process and the recollision of the continuum electrons are effectively restricted to only one side of the core. Then we carried out the orbital reconstruction in both the length and velocity forms. The results show that, the orbital structure can only be successfully reproduced by using the dipole matrix elements projected perpendicular to the permanent dipole in both forms.
Molecular orbital tomography beyond the plane wave approximation
Yang Li,Xiaosong Zhu,Pengfei Lan,Qingbin Zhang,Meiyan Qin,Peixiang Lu
Physics , 2014, DOI: 10.1103/PhysRevA.89.045401
Abstract: The use of plane wave approximation in molecular orbital tomography via high-order harmonic generation has been questioned since it was proposed, owing to the fact that it ignores the essential property of the continuum wave function. To address this problem, we develop a theory to retrieve the valence molecular orbital directly utilizing molecular continuum wave function which takes into account the influence of the parent ion field on the continuum electrons. By transforming this wave function into momentum space, we show that the mapping from the relevant molecular orbital to the high-order harmonic spectra is still invertible. As an example, the highest orbital of $\mathrm{N_2}$ is successfully reconstructed and it shows good agreement with the \emph{ab initio} orbital. Our work clarifies the long-standing controversy and strengthens the theoretical basis of molecular orbital tomography.
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