[en] We investigate the general conditions for an all-orders finite theory by redefining the coupling constants such that both the gauge coupling β-function and the anomalous dimensions of the gauge superfield and chiral superfields vanish. These explicit expressions for the conditions of all-orders finiteness involve solutions of an infinite number of equations. Both a solving process and a criterion for existence of the solutions of the equations are given

[en] We have measured the fragmentation cross sections and the emission angles for 471 AMeV "5"6Fe and 400 AMeV "2"0Ne on Al, C and CH_2 targets using CR-39 plastic nuclear track detector. The total charge changing cross sections agree well with other previous experimental results at different energies and the theoretical prediction of Bradt-Peters semiempirical formula, which are approximately independent of the beam energy but increase with the increase of the target mass. The experimental results are compared with the prediction of the improved quantum molecular dynamical model (ImQMD) together with the GEMINI model. The odd-even effect of the partial cross sections observed in experiments is well produced. It is found that such effect is mainly formed in the grazing collisions and comes from the fragments with T_z = 0, ±0.5. The shape of the isotopic distribution is independent on the target mass and the incident energy but the projectile mass and charge, and the small angular distribution of all fragments comes from the heavier projectile-like fragments which produced in the peripheral collision. (authors)

[en] A beam optical focusing structure with double subwavelength metal slits surrounded by tapered surface dielectric gratings is proposed and demonstrated numerically. In the proposed structure, just with the regulation of the surface gratings, the radiation fields of surface plasmon polaritons (SPPs) can be controlled effectively to make a beam spot at several times the wavelength distance from the slit. Two methods for the control of focal length and width are proposed, and the simulation results verify that both the methods are effective for the design of nano-optical focusing devices. (condensed matter: electronicstructure, electrical, magnetic, and opticalproperties)

[en] The dynamics of the optomechanical entanglement between optical cavity field modes and a macroscopic mechanical breathing mode in a whispering-gallery cavity as well as the continuous variable entanglement between the phase-quadrature amplitudes of the two whispering-gallery modes have been analysed. Simulated results indicate that under state-of-the-art experimental conditions, optomechanical entanglement is obvious and can occur even at temperatures of above 40 K. Compared with the entanglement of the mechanical oscillator at the ground state temperature, optomechanical entanglement is more intense by several orders of magnitude. (general)

[en] The on-line monitoring system for containment leakage, including the frame and the calculation model, used in Qinshan Second Nuclear Power Plant, was introduced. Different typical false alarms of the system, which were found during the using process, were analyzed in detail. The analysis is useful for judging and eliminating in time the false alarms when meeting the similar cases. The modification function of manual intervention and the implementation effect were introduced. The results show that, the false alarms can be eliminated as long as the exception data could be found and deleted in time, and this method can ensure the safe reliability of the nuclear power plant. (authors)

[en] The mobility edges and reentrant localization transitions are studied in one-dimensional dimerized lattice with non-Hermitian either uniform or staggered quasiperiodic potentials. We find that the non-Hermitian uniform quasiperiodic disorder can induce an intermediate phase where the extended states coexist with the localized ones, which implies that the system has mobility edges. The localization transition is accompanied by the $\mathcal{P}\mathcal{T}$ symmetry breaking transition. While if the non-Hermitian quasiperiodic disorder is staggered, we demonstrate the existence of multiple intermediate phases and multiple reentrant localization transitions based on the finite size scaling analysis. Interestingly, some already localized states will become extended states and can also be localized again for certain non-Hermitian parameters. The reentrant localization transitions are associated with the intermediate phases hosting mobility edges. Besides, we also find that the non-Hermiticity can break the reentrant localization transition where only one intermediate phase survives. More detailed information about the mobility edges and reentrant localization transitions are presented by analyzing the eigenenergy spectrum, inverse participation ratio, and normalized participation ratio. (paper)

[en] By using the linear combination of bulk band (LCBB) method incorporated with the top of the barrier splitting (TBS) model, we present a comprehensive study on the quantum confinement effects and the source-to-drain tunneling in the ultra-scaled double-gate (DG) metal—oxide—semiconductor field-effect transistors (MOSFETs). A critical body thickness value of 5 nm is found, below which severe valley splittings among different X valleys for the occupied charge density and the current contributions occur in ultra-thin silicon body structures. It is also found that the tunneling current could be nearly 100% with an ultra-scaled channel length. Different from the previous simulation results, it is found that the source-to-drain tunneling could be effectively suppressed in the ultra-thin body thickness (2.0 nm and below) by the quantum confinement and the tunneling could be suppressed down to below 5% when the channel length approaches 16 nm regardless of the body thickness. (condensed matter: electronic structure, electrical, magnetic, and optical properties)

[en] We study the topological properties of the one-dimensional non-Hermitian Kitaev model with complex either periodic or quasiperiodic potentials. We obtain the energy spectrum and the phase diagrams of the system by using the transfer matrix method as well as the topological invariant. The phase transition points are given analytically. The Majorana zero modes in the topological nontrivial regimes are obtained. Focusing on the quasiperiodic potential, we obtain the phase transition from the topological superconducting phase to the Anderson localization, which is accompanied with the Anderson localization–delocalization transition in this non-Hermitian system. We also find that the topological regime can be reduced by increasing the non-Hermiticity. (paper)

[en] The aim of this study is to assess the evolution of acoustic emission (AE) energy distribution and acoustic emission waiting time of sandstone under uniaxial cyclic loading. Experimental study was conducted to collect AE data for this purpose. The uniaxial cyclic loading test results were statistically analyzed to determine the change in the AE energy distribution as the number of loading cycles increases. The outcomes of this study show that the relationship between energy distributions of acoustic emission signals, P(E), and the absolute energy level can be expressed by a power law where its exponent, ε, changes as the number of cycles increases. Close to the failure stage, ε decreases sharply as the number of cycles increases in accordance with the mean field theory. Furthermore, the existence of temporal correlations was studied by the waiting time and it reveals the existence of acoustic emission signals clustering also in power law (characterized by τ). The evolutions of ε and τ identify a way to signal cyclic loading collapse for brittle material before the sudden disaster failure.

[en] A sort of Passive Autocatalytic Recombiners (PAR), including function, component, site arrangement, in-service test method and period, used in Qinshan Second Nuclear Power Plant Unit 3 and 4, were introduced. Efficiency comparison tests of four groups of initial catalytic plates and that used for one refueling cycle (1C) were conducted. Rust and oil stain issues, which were prone to occur during the commissioning and operation process, impacting on the hydrogen reduction efficiency of catalytic plates were put to test and analysis. The results show that, compared with the initial samples, the hydrogen depletion rate of the catalytic plates after 1C is slightly decreased with the influence of oil stain and dust. A small amount of rust and oil stains does not have a significant impact on the efficiency of the catalytic plates. However, rust is liable to cause the catalytic plate to be perforated and to be damaged. Flue gas generated in the test of the oil stain plates is easy to interfere with the dehydrogenation process. (authors)