Torsional Wave in a Viscoelastic Layer over a Viscoelastic Substratum of Voigt Types

This article explores the dissipation and dispersion of torsional wave resulting from imperfection in elasticity in terms of internal friction, layer width between dissimilar homogeneous viscoelastic isotropic medium having Voigt-type viscosity. The closed forms solutions for the displacement in the upper layer and lower half space are obtained separately. The generalized torsional wave period equation is obtained and the angular frequency has been plotted against wave number for different values of relevant parametric variation and certain particular cases have been deduced. Dissipation and dispersion are analysed using two and three dimensional plots along with filled contour plots.     

IBEM for Impedance Functions of an Embedded Strip Foundation in a Multi-Layered Transversely Isotropic Half-Space

An indirect boundary element method (IBEM) is developed to study the dynamic impedance functions (stiffness coefficients) of a rigid strip foundation embedded in a multi-layered viscoelastic transversely isotropic (TI) half-space. The proposed IBEM using half-space Green’s functions of distributed loads as fundamental solutions have the merits of fictitious loads being directly applied on the real boundaries without the problem of singularity and of the discretization effort restricted to local boundaries. In addition, the accuracy of the proposed method is not affected by the thickness of the discrete TI layers, as the exact dynamic stiffness matrix is employed. The presented algorithm is verified via comparisons with published results for the isotropic medium. By taking a rigid strip foundation embedded in a homogeneous half-space, a single-layered half-space, and a multi-layered half-space as examples, the effects of material anisotropy, frequency of excitation, and soil layer on the impedance functions are studied in detail. Numerical results show that impedance functions for the TI medium can be significantly different from those of the isotropic case. The variation of TI parameters alters the dynamic characteristics of the TI layered site, which in turn alters the dynamic interaction between the soil and foundation. In addition, the soil sedimentary sequence also has a remarkable influence on the impedance functions.     

明代“剪灯”系列小说序跋与小说生态环境的考察几种传播途径

＂剪灯＂系列小说是明代文言小说领域的重要作品,通过对其序跋的研究,可以透视明代初期洪武年间到明代中期万历年间小说的生态环境;四个阶段的序跋恰好体现了明代小说逐步突出困境,日益赢得受众的喜爱,同时又不能不受主流思潮制约的过程。     

论媒体监督对司法工作的影响

权力必须受到监督和制约,司法权力也不例外,其主要措施是对司法权实施内部和外部监督。媒体监督是外部监督的主要措施。本文着重论述了媒体监督对司法工作的影响,提出规范媒体监督和司法关系的基本思路,以营造良好的司法环境。     

中小企业薪酬留人：基于战略管理的模式设计

中小企业在我国社会经济中的地位和作用不断增强,但由于社会、历史和自身等诸多方面的原因,中小企业的人才流失相当严重,严重制约了自身的发展。基于战略目标的薪酬管理是把企业看成一个大家庭,员工是家庭的成员,企业的发展和个人的成长有机融合。因此,中小企业的薪酬管理应从企业的战略角度出发。塑造以人为本的薪酬理念,设计合理的薪酬体系,推进薪酬与绩效的有机融合。唯有如此,中小企业才能在市场竞争中有目的、有计划地留住人才。