[en] Using the 1.31 × 10"1"0 J/ψ events and the data above open charm collected at BESIII detector, we studied and observed a lot of exotics, including X(3872), X(3823), Y(2175), Y(4140), Z_c(3900), Z_c(4020), and so on. Some of them are confirmed, some of them are observed for the first time, and some of them are searched, but with no obvious signal.

[en] Containment leak tightness and structural integrity test (hereinafter referred to as the containment test) is an important nuclear power plant comprehensive test, with participating departments, contractors, referred systematic, professional, long test time and so, you need to work closely with all parties to complete. Article describes the organization and preparation Fuqing Nuclear Units l and 2 during the commissioning containment test, test implementation and evaluation of test results, analysis and evaluation of the significance of the test, lack of Units l and 2 summarize the test, proposes follow-up unit recommendation for improvement. (authors)

[en] Electrolysis of solid chalcopyrite (CuFeS_2) against a graphite inert anode has been studied in equimolar NaCl-KCl melt at 700 °C. During electrolysis, S"2"− ions are released from the solid CuFeS_2 cathode, transfer to the graphite anode and discharge to S_2 gas. The reduction mechanism of CuFeS_2 was investigated by cyclic voltammetry, potentiostatic and constant voltage electrolysis together with spectroscopic and scanning electron microscopic analyses. The reduction contains mainly three stages: the insertion of Na"+ or K"+ into CuFeS_2, forming L_xCuFeS_2 (L = Na or K, x ≤ 1); the partial reduction of L_xCuFeS_2 to L_x_-_wCuFe_1_-_yS_2_-_z and Fe; the complete reduction to a mixture of Cu and Fe, which can be magnetically separated. After the separation, pure Cu can be obtained by leaching out the residual Fe with acid. Electrolysis at a cell voltage of 2.4 V has led to a rapid reduction of CuFeS_2. The current efficiency and energy consumption were 85% and 1.68 kWh/kg-CuFeS_2, respectively.

[en] Fe(x)/Mo(y) multilayered thin films (MLF) with y=7.0 nm and x=0.7, 1.3, 2.6, 3.6, 13.0 nm were fabricated by radio frequency (RF) sputtering. X-ray diffraction evidences that these films have a good periodicity and bcc structure for both Fe and Mo layers. Moessbauer spectra at room temperature (RT) are used to investigate the structure and the local magnetic properties of the interfaces between Fe and Mo layers. It is found that the interfaces present alloying features, i.e. the Fe atoms are randomly substituted by Mo atoms. Magnetic anisotropy which forces magnetic moments to lie in the film plane and reduced magnetic moments in interface region were observed. The specific magnetization of the films exhibits a BT^3/2 dependence with very large values of B which can be attributed to the distribution of exchange interaction in the interfaces. (orig.)

[en] A method is introduced for the measurement of the integrated luminosity of the fast reconstructed data sample taken in BES II Ψ(3770) scan experiment. By using this method, the authors measured the integrated luminosity of the data sample taken at every energy points

[en] The band structure, density of states of Al_xGa_1−xN and In_yGa_1−yN was performed by the first-principles method within the local density approximation. The calculated energy gaps of the AlN, Al_0.5Ga_0.5N, GaN, In_0.5Ga_0.5N and InN were 5.48, 4.23, 3.137, 1.274 and 0.504 eV, which were in agreement with the experimental result. The dielectric functions, absorption coefficient and loss function were calculated based on Kramers–Kronig relations. Further more, the relationships between electronic structure and optical properties were investigated theoretically. For Al_xGa_1−xN and In_yGa_1−yN materials, the micromechanism of the optical properties were explained.

[en] The electron transfer within several dipeptides and their corresponding phosphorylated dipeptides was studied by electron pulse radiolysis, laser photolysis and electron spin resonance. The electron transfer rate constants were calculated by data modeling and kinetic analysis. It is found that the phosphoryl group in peptides participates the electron transfer process, and reduces the electron transfer rate in all cases. These are very important in life science since every biological process refers to the phosphorylation and nonphosphorylation of protein. It may be concerned in personalities and individualities of the personae. (author)

[en] Relativistic free-motion time-of-arrival theory for massive spin-1/2 particles is systematically developed. Contrary to the nonrelativistic time-of-arrival operator studied thoroughly in the previous literatures, the relativistic time-of-arrival operator possesses self-adjoint extensions because of the particle-antiparticle symmetry. The nonrelativistic limit of our theory is in agreement with the nonrelativistic time-of-arrival theory

[en] After an extreme earthquake attacks an urban area with many mountains, the main objective of a search and rescue operation is to minimize the number of fatalities. Therefore the task of transportation rescue resources to operational areas is of great importance to disaster managers. This paper presents a quick path planning method based on Artificial Immune Algorithm (AIA) and helicopter operation performance in order to design an optimal path for an operational area. First, a simulation of an earthquake is implemented in environment only including terrain threat. Second, a more complex model contains terrain, weather, building and communication threats simulation is executed and the resulting performance measures are evaluated by considering the survival time and total value for taken out entrapped occupants in the disaster area. Additionally, the best parameters of planning path for dual helicopters to an operational area are determined. Further work will be dedicated to adding real 3D terrain model into the current threat model. (paper)

[en] For the solar linear Fresnel collector, the arc of the primary reflective mirror is usually fixed to a certain degree, because of which, the light spot will be oversized when the solar incident angle varies within a certain range, thus affecting the concentration effect and the collecting efficiency. Moreover, the “edge effect” of the reflective mirror also has a detrimental effect on the concentration accuracy. Based on the theoretical analysis, this paper proposes a method to automatically adjust the arc of the primary reflective mirror in accordance with tracking angle, and then the method of solving the problem of edge effect is also suggested. (paper)