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Based on the generalized transmitting matrix (GTM) method to analyze the propagation characteristics of anisotropic media, the layered biaxial anisotropic media are analyzed. The state vector and coupling matrix of the transverse field in biaxial anisotropic media are constructed to obtain the eigenwave in biaxial anisotropic media. The GTM is introduced to obtain the reflection coefficient and transmission coefficient of layered biaxial anisotropic media. The angular and frequency characteristics of different dielectric coated structures are analyzed, and the numerical results are highly consistent with those of commercial software. Further, the electromagnetic propagation matrix is combined with the shooting and bouncing ray (SBR) method to obtain the electromagnetic scattering characteristics of the dielectric coated target. The root mean square error between the radar cross section results and the commercial software results is less than 3 dBsm, which reflects the accuracy of this method. [ABSTRACT FROM AUTHOR]

MoS2 nanostructures with different morphologies were synthesized using a simple in‐situ hydrothermal process by different surfactants like hexadecyl trimethyl ammonium bromide (CTAB) and polyvinyl pyrrolidone (PVP), and the effect of morphologies on the adsorption property for Cr(VI) were investigated. It can be found that flower‐like and spherical MoS2 nanostructures were synthesized and their morphologies largely effected the adsorption performance toward Cr(VI) ions. Flower‐like MoS2 exhibited the surface area of 41.9 m2 g−1 with fairly high adsorption capacity of 66.1 mg g−1 toward Cr(VI), fitting well to pseudo‐second order kinetic model and Langmuir isotherm model. Moreover, this as‐prepared nanostructured MoS2 also presented satisfying reusability for removal of Cr(VI) and were even suitable for the selective removal of Cr(VI) in the presence of NO3−. It may provide a potential route to enhance the adsorption property of MoS2 toward heavy metal ions through adjusting the morphology of the MoS2 sample, which would expand the applications of MoS2 in the field of treatment of the heavy metal wastewater. [ABSTRACT FROM AUTHOR]

In high-speed precision machining, thermal deformation caused by temperature rise affects the accuracy stability of the machine tool to a significant extent. In order to reduce the thermal deformation of ball screws and improve the accuracy, a new adaptive method based on carbon fiber reinforced plastics (CFRP) was proposed in this study and the thermal deformation of ball screws was determined. By using the sequential coupling method, the thermal–structural coupling analysis of a ball screw was conducted based on the finite element method (FEM). The analysis results were verified through a comparison with the experimental results. Based on the verification, an FE model of the improved ball screw was established to study its thermal characteristics. The key design parameters of the improved ball screw were optimized based on the Kriging model and genetic algorithm (GA). The thermal reduction effect of the improved ball screw was validated through the experimental results. The results indicate that the adaptive method proposed in this research is effective in reducing the thermal deformation of ball screws. [ABSTRACT FROM AUTHOR]