Shenggang Liu

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Foot-and-mouth disease (FMD) is economically the most important viral-induced livestock disease worldwide. In this study, we report the results of a survey of codon usage bias of FMD virus (FMDV) representing all seven serotypes (A, O, C, Asia 1, SAT 1, SAT 2, and SAT 3). Correspondence analysis, a commonly used multivariate statistical approach, was(More)
A physical phenomenon has been found: in a structure of nanometal film with dielectric-medium loading, the surface polaritons excited by a uniformly moving electron bunch can be transformed into Cherenkov radiation with intensity enhancement in the medium. Based on this mechanism, the surface polariton Cherenkov light radiation source is presented and(More)
Terahertz (THz) radiation can revolutionize modern science and technology. To this date, it remains big challenges to develop intense, coherent and tunable THz radiation sources that can cover the whole THz frequency region either by means of only electronics (both vacuum electronics and semiconductor electronics) or of only photonics (lasers, for example,(More)
The past few decades have witnessed a substantial increase in terahertz (THz) research. Utilizing THz waves to transmit communication and imaging data has created a high demand for phase and amplitude modulation. However, current active THz devices, including modulators and switches, still cannot meet THz system demands. Double-channel heterostructures, an(More)
In this paper, the excitations of surface plasmon polaritons (SPPs) by both perpendicular and parallel electron beam are investigated. The results of analytical theory and numerical calculation show that the mechanisms of these two excitations are essentially different, and the behavior and properties of SPPs in metal structures strongly depend on the(More)
This paper explores the physics of the electromagnetic diffraction radiation of a subwavelength holes array excited by a set of evanescent waves generated by a line charge of electron beam moving parallel to the array. Activated by a uniformly moving line charge, numerous physical phenomena occur such as the diffraction radiation on both sides of the array(More)
One basic assumption for high-efficient SAR imaging algorithms is azimuth-shift-invariance of SAR data. The new spaceborne high-resolution wide-swath (HRWS) SAR generation will retain the same significant swath depth of the past but will achieve much higher resolution. The formerly insignificant variance of effective radar velocity along azimuth path will(More)
Dear editor, With effective controllability on the asymptotic frequency, mimicking surface plasmon polaritons (MSPPs) device can perfectly confine electromagnetic (EM) field in subwavelength scale with high intensity from microwave to optical frequencies [1– 4]. So, it can meet the pursuit for future terahertz miniaturized components and highly integrated(More)
Utilizing THz wave to transmit data for communication and imaging places high demands in phase and amplitude modulation. In this paper we combined a metamaterial array with HEMT structure to form an ultrafast electronic grid-controlled THz modulator. By controlling the carrier concentration of 2DEG, a resonant mode conversion between two different dipolar(More)
In this article, we present a distributed resource and power allocation scheme for multiple-resource wireless cellular networks. The global optimization of multi-cell multi-link resource allocation problem is known to be NP-hard in the general case. We use Gibbs sampling based algorithms to perform a distributed optimization that would lead to the global(More)