中小企业固定资产投资与决策分析

中小企业作为一支不可忽视的力量在世界经济发展的历史中发挥了巨大的促进作用.同样中小企业在我国经济中也占据着不可忽视的重要地位,然而我国中小企业的发展仍面临着很多难题,尤其是固定资产投资这样关系到中小企业生存的重大问题.本文在分析影响中小企业固定资产投资相关因素的基础上,进一步探讨了中小企业固定资产投资决策相关问题,并提出了中小企业固定资产投资决策的方法措施.     

地方性知识视阈下我国农村公共体育服务供给理念的反思及重构

摘要：主要借助个案,通过文献资料、问卷调查和文本分析等主要研究方法,重点就当前我国农村公共体育服务供给理念特征、科学性与否及其如何优化3个问题,展开了更为充分的探讨和研究。研究结果表明：我国农村公共体育服务供给理念是同质化的,供给过程当中也多带有效率优先、标准取向和非区域视野主要特征;公共体育设施维护与监管、利用率与满意度、民俗体育的发展及传承等方面,农村公共体育服务供给理念科学性尚需进一步完善。。有鉴于此,在结合地方性知识理论启示意义基础上,就我国农村公共体育服务供给理念的优化路径提出：立足视点转换,凸显老百姓主体地位;依“智”而行,分层递进,努力提升我国农村公共体育服务供给中的适切性、实效性和专业化发展水平;以及重地域情境,加强“普适性知识”的适应性改造,以切实保证农村公共体育服务供给中相关政策的制定和执行真正能够起到规范和激励效果等重要意见和建议。旨在为我国农村公共体育服务的有效供给,提供重要的启示和借鉴意义。     

Engineering the race car wing: application of the vortex panel numerical method

This study examined aerodynamic properties and boundary layer stability in five cambered airfoils operating at the low Reynolds numbers encountered in motor racing. Numerical modelling was carried out in the flow regime characterised by Reynolds numbers 0.82–1.29 × 10⁶. The design Reynolds number of 3 × 10⁶ was used as a reference. Aerodynamics variables were computed using AeroFoil 2.2 software, which uses the vortex panel method and integral boundary layer equations. Validation of AeroFoil 2.2 software showed very good agreement between calculated aerodynamic coefficients and wind tunnel experimental data. Drag polars, lift/drag ratio, pitching moment coefficient, chordwise distributions (surface velocity ratio, pressure coefficient and boundary layer thickness), stagnation point, and boundary layer transition and separation were obtained at angles of attack from −4° to 12°. The NASA NLF(1)-0414F airfoil offers versatility for motor racing with a wide low-drag bucket, low minimum profile drag, high lift/drag ratio, laminar flow up to 0.7 chord, rapid concave pressure recovery, high resultant pressure coefficient and stall resistance at low Reynolds numbers. The findings have implications for the design of race car wings.     

The effects of testing procedure on critical fall height determination for third-generation synthetic turf

Test procedures and their accuracy in determining critical fall height (CFH) on sporting grounds are paramount to player safety. The procedure currently adopted for synthetic turf in Australian football [1] consists of four consecutive drops at various drop heights at three test locations on the sample. The quantity and packing of the infill in third-generation turf and the pooling effect of the rubber particles with consecutive drops suggests that the current standard protocol may need re-assessment. Therefore, the purpose of this pilot study was to investigate whether current methods of testing for CFH are appropriate for third-generation synthetic turf or whether an alternative or adapted method needs to be developed. CFH was measured, using a HISUN Uniaxe-II Impact Tester, on 12 combinations of synthetic turf samples (four different products with three shock pad options). Three conditions were investigated on each sample; the existing protocol; an alternative 12 single-drop protocol and four single drops from the CFH determined from the existing protocol. A significant difference was found for both absolute and percentage difference between the existing and 12 single-drop protocol, with p = 0.001 and t = 4.33 and p < 0.001 and t = 6.03, respectively. There was also a significant difference between the CFH reached with and without a shock pad for both the existing protocol and the 12 single-drop protocol. The results of this pilot study demonstrate that differences do occur with alterations to the existing protocol and highlight the need for a more detailed characterisation of testing methods on third-generation synthetic turf and the response of surfaces to them.     

Three-dimensional kinematic analysis of the golf swing using instantaneous screw axis theory,Part 2: golf swing kinematic sequence

A number of recent studies have measured the extent and timing of segment rotation during the golf swing. A promising technique, instantaneous screw axis (ISA) theory, could provide a better expression of segment rotation. In Part 1 of this two-part study, the objectives are to identify the ISA of the pelvis, shoulders and left arm during the downswing, compute segment angular velocity relative to that segment’s ISA and verify that ISA theory is a valid tool to analyse segment rotation during the golf swing. Results indicate that for all subjects, at least 71% of marker velocity is a result of rotation about their respective ISA, when averaging results over the duration of the downswing, confirming that motion is primarily rotational. Furthermore, ISA position and orientation of each segment approaches, on average, the expected gross axis of rotation, confirming that motion about the ISA is representative of joint motion.     

郴州汝城“哥釉瓷”辨正

汝城县为郴州市所辖区县之一,位于湖南省东南部湘、粤、赣三省交界,素有＂鸡鸣三省,水注三江＂美誉。自东晋置县至今已有1600多年历史。在这样一个名不见经传的小山城却出产＂哥釉瓷＂,它那纵横交错的＂冰裂纹＂和古朴器形、莹润釉质都具有独特的美感,     

我国高水平赛艇运动员机能评定指标的初步研究

以174名优秀赛艇运动员为研究对象,通过查阅文献资料,问卷调查、专家访谈与数理统计等方法,建立了我国优秀赛艇运动员的初步机能评定指标体系,为优秀赛艇运动员的机能评定及筛选提供了参考依据.     

体育市场管理的法制化研究

体育市场是市场经济体制下的必然产物。文章在研究相关文献资料的基础上发现,近十几年来我国体育市场虽然取得了很大的发展,但还是存在着许多问题。文章针对当前体育市场发展的现状,提出新时期加强和完善体育市场的法制化管理的意见,旨在促进体育市场的健康发展。     

Bowling ball dynamics revealed by miniature wireless MEMS inertial measurement unit

This paper presents a novel sensor technology to deduce the dynamics of a bowling ball. The sensor, a miniature wireless inertial measurement unit (IMU), incorporates MEMS accelerometers and angular rate gyros, a microcontroller, a low power RF transceiver, and a rechargeable battery. When embedded in a bowling ball, the IMU transmits the acceleration and angular velocity data that define the dynamics of the ball starting with the bowler’s delivery and its motion in the lane. Example results from professional bowlers illustrate how this technology can be used to assess bowler skill and ball performance. For instance, the IMU accurately measures the spin dynamics of the ball which are crucial to develop the ball “hook.” An analysis of ball dynamics in the lane is distilled to a measurable “hook potential” metric for further assessing bowler skill. Finally, the sensor presented herein is believed to be the world’s smallest, wireless IMU. This highly miniaturized and wireless design will enable parallel training systems for many sports, including basketball, baseball, crew, cricket, golf, fly fishing, soccer, softball, tennis, rowing, among others.