[en] There are about 2.9 fb⁻¹ of e⁺e⁻ annihilation data, which is the largest ψ(3770) data sample in the world, had been taken at the center-of-mass energies of √(s)=3.773 GeV with the BESIII detector at the BEPCII collider in the last running year. Based on these near open-charm threshold data, we have experimentally studied the leptonic and semi-leptonic decays of charm mesons, as well as the FCNC decay of D⁰→γγ and presented several preliminary results. These results are obtained from charm data with very high quality, leading to a few percent level's validation of the Lattice QCD calculations, and a precise measurements of CKM elements, V_cd and V_cs, which can be used to improve the test of the CKM unitarity. The prospects on rare and forbidden charm decays at BESIII are also included

[en] This article raise a new psychological concept 'Chernobyl Shadow' evoked by Chernobyl nuclear accident for the implementation of modem nuclear accident emergency system. Its causes and patterns, as well as influence upon structuring local harmonious psychological environment in implementing nuclear accident emergency system are analyzed in order to create and construct a harmonious psychological environment for the development of local nuclear power in China. (author)

[en] The paper deals with two methods to recognition nuclear explosion electromagnetic pulse based on neutral network and fuzzy. Firstly the feature value extraction for the sample of nuclear explosion signals and lighting signals is discussed. Secondly two mathematic models are established. Finally, we test the recognition efficiency of the two method with certain amount of samples, the recognition includes the classification between nuclear explosions and lighting and the classification between hydrogen bombs and atomic bombs

[en] Highlights: • A discussion on the influences of flow transition on heating capacity is proposed. • Flow transition is captured by intermittency factor within an IDDES method. • Meanwhile, flow physics behind aerodynamic performances are proposed. • The influences of evaporation and condensation temperature are discussed. - Abstract: This paper proposes a detailed discussion on the influences of flow transition on heating capacity of wind power heat pump system based on a novel improved delayed detached eddy simulation (IDDES) method and thermodynamic analysis. A numerical study of DU-212 airfoil flow field at high Reynolds number (up to 1.5 × 10⁷) is first conducted. It is found that with high Reynolds number (Re = 1.5 × 10⁷), flow transition is remarkably promoted and lower aerodynamic drag is achieved due to the decrease of momentum loss. Then, the influences of leading-edge trip on aerodynamic performances are studied and corresponding physical mechanisms are revealed. Furthermore, the heating capacity of a two-stage heat pump system is evaluated based on thermodynamic analysis. It is found that enhanced flow transition associated with leading edge trip could account for a reduction of heating capacity to at most 21.8% under certain circumstances. Eventually, the influences of evaporation and condensation temperature are briefly studied.

[en] Highlights: • Microbial acetate tolerance response could enhance hydrogen yield from kitchen wastes. • H⁺-ATPase activity played an important role in the acetate tolerance response process. • Maximum concentration of dehydrogenase enzyme was 4903.4 μg/(gTS h) in 6.0 g/L group. - Abstract: The microbial acid tolerance response (ATR) was adopted to improve the hydrogen yield by relieving the organic acids inhibition. The results indicated that the hydrogen generation from kitchen wastes could be enhanced with the acetic acid stress of 6.0 g/L, and it reached 68.3 mL/gVS, which was 2.09 times of the control. The improvement was due to the increase of acetic acid tolerance with more ATR induction, since the increase of hydrogen yield was positive correlation with the concentration of acetic acid. H⁺-ATPase activity system played an important role in the ATR. It reached maximum of 132.4 U/gTS at 6.0 g/L stress, which was 45.2% higher than the control. Dehydrogenase enzyme in 6.0 g/L group improved of 50.6% than the control, and it could indicate the microbial activity during hydrogen generation process

[en] Highlights: • Co-digestion mode improves the biogas yield of Taihu algae and kitchen wastes. • Neutral protease enzyme reached maximum in algae only group. • The activity of dehydrogenase enzyme in mixed substrate groups was higher than that of algae and kitchen wastes only group. - Abstract: Co-digestion of Taihu algae with high carbon content substrate can balance the nutrients in the fermentation process. In this study, optimal mixing ratio for co-digestion of Taihu algae and kitchen wastes were investigated in order to improve biogas production potential. The results indicated that the biogas yield reached 388.6 mL/gTS at C/N15:1 group, which was 1.29 and 1.18 times of algae and kitchen wastes only. The maximum concentration of VFA reached 4239 mg/L on 8th day in kitchen wastes group, which was 1.21 times of algae group. Neutral protease enzyme activity in algae group reached maximum of 904.2 μg/(gTS h), while dehydrogenase enzyme at C/N 15:1 group reached maximum of 3402.2 μgTF/(gTS h). The feasibility of adjusting the C/N with co-digestion of Taihu algae and kitchen wastes to increase biogas production was demonstrated. Remarkably, the C/N of 15:1 was found to be the most appropriate ratio

[en] ZAO (ZnO:Al) transparent conductive thin films have been prepared by middle-frequency alternative magnetron sputtering with ZAO (98 wt.% ZnO+2 wt.% Al₂O₃) ceramic target. The influences of substrate temperature on the microstructure, optical, and electrical performances of ZAO films have been studied. UV-Vis and Van der Pauw investigated the visible transmittance, carrier concentration, and Hall mobility, respectively, while microstructure has been characterized by X-ray diffraction (XRD). The results show substrate temperature is a dominant factor for microstructure, optical, and electrical performances of ZAO thin films. The lowest resistivity obtained in this study was 4.6x10^-4 Ω cm for the film with sheet resistance of 32 Ω, which was deposited at the substrate temperature of 250 deg. C and operation gas pressure of 0.8 Pa

[en] The influence of annealing temperature on the micro-structure, surface morphology and optical property of TiO₂ thin films prepared by mid-frequency ac magnetron sputtering technique has been studied. The micro-structure and surface morphology were examined by X-ray diffractometer (XRD) and atomic force microscopy (AFM). The transmittance and reflectance spectra of TiO₂ thin films on fused silica substrate were measured by spectrophotometer. The reflective indices and extinction coefficients of TiO₂ films were calculated by envelope method and experimental expression, respectively. The results show that the TiO₂ thin film sputtered at room temperature is amorphous. After annealing under lower temperature (=700 deg. C), anatase phase appeared in TiO₂ thin film. After annealing under higher temperature (=900 deg. C), the structure of TiO₂ thin film changed into rutile completely; the TiO₂ grains changed from column to nubbly. The refractive index of TiO₂ thin film increases with annealing temperature and the extinction coefficient decreases a little during the lower temperature anneal. The TiO₂ thin film annealed at 500 deg. C has the best optical property

[en] 940 WANO operating event reports from 1993 to 2002 were analyzed, among which 551 were found relative to human errors. Human errors are still one of the major causes of accidents in a nuclear power plant (NPP). In the paper, the following conclusions are concluded: (1) human errors in test, maintenance and calibration leading to the potential failure of the system are the main causes of human factor incidents; (2) there is a comparatively high probability of human errors in the period of start-up and shutdown of a reactor which are liable to cause severe accidents; (3) the probability of human errors is not necessarily related to the type of a reactor; (4) the main human errors include the error judgment on the symptoms and manipulation which most probably cause severe transient and the failure of safety system or improper shutdown; (5) lack of theoretical knowledge, poor manipulation, organization management failure, inappropriate procedures, carelessness and lack of check-up are the major root causes of human errors. (authors)

[en] A critical rule without free parameters to estimate the size-dependent enhancement or reduction of phase transition pressure ΔP_e(D) for phase transitions of nanocrystals is established where D denotes the size of nanocrystals. ΔP_e(D) function is determined by D, surface energy γ, surface stress f and gram-atom volume V_g of the two transition phases. Also, the individual contributions of γ and f on ΔP_e(D) can be separated. Our model predictions agree well with the corresponding experimental and theoretical results. This model is of fundamental significance in understanding the essence of size-dependent pressure induced phase transition and guiding the experimental scientists to estimate their results. - Highlights: • Size-dependent phase transition pressure for nanocrystals is discussed. • Variation tendencies of phase transition pressure can be determined. • Surface energy, surface stress and gram-atom volume are the decisive parameters. • Individual contributions of surface energy and surface stress are clarified. • Model predictions agree well with the experimental and theory results