[en] Textile is related on life, work environment closely. In recent years, with the development of national economy and people's living standards, application fields of various types of civil and industrial fibers and textiles were expanded. The request of light, beautiful decorations curtains, wall covering, carpet, and curtain was increasing. However, these textiles were mostly combustible. When they fired, they released a large number of smoke and affected people's lives and property seriously. Using chemical methods to blending and copolymerization to finish flame-retardant, they had their own advantages, but the use of electron accelerators for radiation grafting technology, which had energy efficient, environmentally friendly, was able to ensure the flame-retardant effect while reducing the amount of flame retardants. Compared flame-retardant material with non-irradiated to radioactive materials and flame-retardant, flame-retardant properties and mechanical properties were better than before. And compared with chemical methods, the process of radiation grafting was simple and had a single product, high productivity and a huge advantage. (authors)

[en] Security is an integral part of the process of business operations. The radiation processing enterprises due to their own particularity, more need to focus on the operation of the safety factors, the construction of corporate safety culture is of great significance in guiding carry out the work of the Radiation Protection. Radiation processing enterprises should proceed from their own characteristics, the common attitude of security systems and security construction, and constantly improved to ensure the personal safety of radiation workers in the area of safety performance. (authors)

[en] In order to improve the hydrophilic properties of nonwovens, we use the Dinami type electron accelerator to radiation the nonwovens for grafting acrylic acid monomer. The influence of different radiation grafting rate to nonwovens hydrophilic properties was studied. We use scanning electron microscopy (SEM) to observe nonwovens sample irradiation grafting and surface roughness comparison specimens before and after grafting, and changes in surface morphology. The contact angle was used to show the nonwoven fabric surface hydrophilicity. The water retaining rate was used to show the nonwovens hydrophilic. (authors)

[en] Recently, the single metal wire (SW) has become attractive for its potential applications in the terahertz and higher frequency range. However, as the most simple and typical surface plasmon polariton (SPP) transmission line, its study seems far from enough. Many important transmission behaviours have not been explained satisfactorily from the viewpoint of physics. In this paper, making use of the modified Drude model (MDM) based on the Sommerfeld theory, the transmission behaviours of SPPs along SW are systemically investigated theoretically. Some important physical phenomena such as the mode transformation, the lifetime of the radiative mode and the resonance frequency are revealed, and their mechanisms are explored. The results obtained in the paper will facilitate a general understanding of the features and the physical essence of the SPP transmission, not only for SW itself but also for other SPP transmission lines

[en] With the aid of a three-dimensional particle-in-cell code simulation, the enhancement of Smith—Purcell radiation with a surface-plasmon mode excited by a single electron bunch and by a premodulated electron beam is considered in the paper. In the simulation, the model is a grating covered by Ag film. The results demonstrate that when the surface-plasmon mode is excited by a single electron bunch, the maximum radiation occurs at an observation angle depending on the surface-plasmon frequency, and the radiation power can be enhanced more than ten times. And for pre-bunched electron beam excitation, when one of the harmonics of the bunching frequency is resonant with that of the surface-plasmon mode, the radiation power is twenty times more than that from a perfectly conducting grating excited by the same premodulated electron beam

[en] A new design of NaYF₄: Eu³⁺ microwires (MWs) with a hexagonal structure were synthesized via a facile hydrothermal method assisted with the sodium citrate, and their microstructure and phase structure have been analyzed. The photoluminescence (PL) mechanism of β-NaYF₄: Eu³⁺ MWs was systematically investigated under 532 nm laser excitation through adjusting MW number and excitation environment including the excited position, laser power, and temperature. The strongest emission peak originated from the ⁵D₀→⁷F₂ hypersensitive transition in this system. Furthermore, owing to the special temperature-dependent optical properties of β-NaYF₄: Eu³⁺ MWs, time-resolved PL spectroscopy with high sensitivity is in situ real-time monitored at 1273 K to reveal the underlying mechanism of stark splitting. Therefore, our study should serve as a promising application in optical thermometry.

[en] The influence of minor boron on the microstructure and mechanical properties of solution-treated and as-extruded Mg₉₄Y_2.5Zn_2.5Mn₁ alloys has been investigated in this paper. The mechanisms of long period stacking ordered (LPSO) phase transformation during solid-solution treatment and dynamic recrystallization (DRX) in the process of extrusion were analyzed. Experimental results demonstrate that the boron addition effectively promotes the precipitation of 14H LPSO phase and reduces the area fraction and average size of the W phase particles in the solution-treated Mg₉₄Y_2.5Zn_2.5Mn₁ alloy. Furthermore, boron delays the dynamic recrystallization process due to increased 14H LPSO phase during extrusion process. And two kinds of DRX were observed in as-extruded alloys. Finally, the boron addition improves the mechanical properties of both the solution-treated and as-extruded Mg₉₄Y_2.5Zn_2.5Mn₁ alloys. Especially, the as-extruded Mg₉₄Y_2.5Zn_2.5Mn₁ alloy with 0.003 wt% boron addition exhibited optimal mechanical performance with ultimate tensile strength (UTS) and elongation of 389.7 MPa and 24.9%, respectively.