体育旅游产业区域发展模式构建的研究——以郴州市为例

构建了郴州市区域体育旅游产业发展模式的基本结构,论证了"非均衡协调发展方式"是我市区域体育旅游产业发展的最佳选择.同时基于我市体育旅游产业"内、外要素"分析,构建了以郴州市区和资兴市为核心区,永兴县、汝城县和宜章县为重点区,其他地区为辐射区的我市体育旅游产业区域发展模式.     

Describing the plastic deformation of aluminium softball bats

Hollow aluminium bats were introduced over 30 years ago to provide improved durability over wooden bats. Since their introduction, however, interest in hollow bats has focused almost exclusively around their hitting performance. The aim of this study was to take advantage of the progress that has been made in predicting bat performance using finite elements and apply it to describe bat durability. Accordingly, the plastic deformation from a ball impact of a single-wall aluminum bat was numerically modelled. The bat deformation from the finite-element analysis was then compared with experiment using a high-speed bat test machine. The ball was modelled as an isotropic, homogeneous, viscoelastic sphere. The viscoelastic parameters of the ball model were found from instrumented, high-speed, rigid-wall ball impacts. The rigid-wall ball impacts were modelled numerically and showed good agreement with the experimentally obtained response. The strain response of the combined bat-ball model was verified with a strain-gauged bat at intermediate ball impact speeds in the elastic range. The strain response of the bat-ball model exhibited positive correlation with the experimental measurements. High-speed bat-ball impacts were performed experimentally and simulated numerically at increasing impact speeds which induced correspondingly increased dent sizes in the bat. The plastic deformation from the numerical model found good agreement with experiment provided the aluminium work hardening and strain rate effects were appropriately described. The inclusion of strain rate effects was shown to have a significant effect on the bat deformations produced in the finite-element simulations. They also helped explain the existence of high bat stresses found in many performance models.     

发展文化产业的同时必须弥补文化公益事业发展的缺失

文化事业和文化产业,是进行社会主义文化建设的两个主要的支点,也是文化发展战略的基本内容和主攻方向。本文提出了在大力提倡发展文化产业的同时必须要关注对文化公益事业事业发展的关注和投入,探讨了寻求文化事业和文化产业协调发展的路子。