三维跟踪扫描影像分析方法的实现与精度分析

三维影像分析是运动生物力学的重要研究手段之一,广泛地应用于运动技术分析和诊断中.三维跟踪扫描影像分析方法就是摄像机跟踪运动目标来记录运动的图像,并通过专门的图像解析系统解算得到运动目标空间实际三维坐标的方法.应用SIMI Motion的Pan/Tilt/Zoom功能来实现三维跟踪扫描录像分析,并对所得到的三维测量数据的精度进行评价和分析.研究结果表明,在相同的坐标参考系下,由全站仪和影像分析测量得到的24个点的三维空间绝对坐标的平均相差值为0.018±0.003 m,三维跟踪扫描影像测量的相对误差可以达到1.97%,这样的测量精度可满足运动技术分析的要求.介绍了实现三维跟踪扫描影像分析的全过程,对影响测量精度的因素进行了初步的分析,并提出了应采取的相应措施.     

竞技:人类进步的表征与希望

依照人类学的观点,现代国际范围内的竞技运动,特别是奥林匹克运动会,不过是黑人、白人和黄种人之间的人种间的身体竞争而已。起源于非洲的人类,经历了长途迁徙,对不同气候地理环境的适应,以及生产方式、生活方式的变迁,形成了不同的人种特点,近现代竞技运动用极端的方式将这些不同人种身体上的特点表露出来。不同的文化也不同程度影响了人类身体的发展,这些发展可以反映形态与机能的进化和退化,以及技能的进步。竞技运动是保持人类自身生物优势、抵抗自身退化的重要手段,竞技运动连接着人类过去、现在与未来。从这个意义讲,体质人类学与文化人类学在体育人类学中达到了完美的结合。     

广州地区PM1质量浓度对能见度的影响以及气溶胶吸湿增长因子

利用在线的气溶胶质量浓度与光学特性观测资料,对广州地区进行研究,得到下列3个结论.1）能见度与气溶胶质量浓度呈明显负相关关系.当PM₁大于60 μg/m³时,随PM₁质量浓度降低,能见度变化不明显;当PM₁小于60μg/m³时,随PM₁质量浓度降低,能见度迅速升高.2）相对湿度对能见度的影响很大.当相对湿度在70%～80%范围内时,只有当PM₁的质量浓度小于40μg/m³,能见度才能达到10km;而当相对湿度为80%～85%,PM₁的质量浓度必须小于20μg/m³,能见度才达到10km.3）气溶胶吸湿增长因子f（RH）与相对湿度之间存在下列关系式：f（RH）=0.6+0.133×（1－RH/100）^－1.633,本地化的f（RH）与美国能见度观测网IMPROVE的湿度增长曲线在相对湿度为50%～80%之间具有可比性.     

老年人体重指数与血压的相关性探讨

对216名老年知识分子进行了体质检查,分析了体重指数(BMI)与血压的相关性。结果显示:男女性BMI差异不显著(P≥0 05)。控制其他危险因素后,女性BMI超重者中BMI与SBP(收缩压)几乎呈完全相关(|r|=0 96)。结果表明:到了老年期,男女性体形越来越接近,脂肪总量与脂肪分布差异不大,主要分布在腰、臀及大腿周围。此结果对高血压及心血管疾病的防治提供了有效的理论依据。     

中外女子七项全能最佳成绩系统的多层灰色关联分析

以1987-1995年中外历年来前20名选手的总体成绩为时间序列，运用灰色关联分析等研究方法对此成绩系统进行了多层统计分析．揭示了总成靖与跑、跳和投类项目及各类之间的数量关系，进一步探讨了各类成绩与该类各子项及各子项之间的关联程度，并对此进行了中外比较分析和各自的结构构成分析，它可为我国优秀女子七项全能选手训练计划的制定提供有益参考。     

关于我国驰名商标保护的若干问题

从我国驰名商标保护的实践出发，探讨了驰名商标保护的几个问题，并对完善我国驰名商标法律保护制度提出了建议。     

论青源惟信见山见水参禅三境界

禅者抉择身心,孜孜切切,始之难入,中之做功夫,终之廓然开朗,所谓关外有关,天外有天。最惧了草而事,轻忽而行,可退可休,而得少为足;最须死心信受,疾驱长驰,殚精竭神,不退不休,而破重重幽关。青源惟信见山三阶段与六祖惠能之三次悟互照互应,其皆能激发学人疑情,使学人遍得一切深浅,而登解脱自在之门。     

The predictors of perceived social support among former foster youth

Based on a 5-wave panel survey of 732 foster youth, the current study examined the respective relationships between foster youths' individual characteristics, youths' social connections with individuals and formal institutions, and the development of perceived social support across the transition to adulthood. Several youth characteristics – including self-reported delinquency and attachment insecurity – were found to be statistically significantly associated with perceived social support. Attachment insecurity also appeared to mediate the relationships between social support and several other youth-level characteristics, including prior placement disruptions and placement with relatives. Social connections with different types of individuals – including caregivers, relatives, natural mentors, and romantic partners – were found to be associated with additive increases in perceived social support. However, some types of connections (e.g., romantic partners, natural mentors) appeared to be associated with much larger increases in social support than other connections (e.g., school or employment). Collectively, the findings help inform agencies' efforts to bolster foster youths' social connections as they transition to adulthood.     

Effect of Manual Guidance on Acquiring a New Bimanual Coordination Pattern

Purpose: This study explored the relationship between the caring climate, empathy, prosocial behaviors, and antisocial behaviors, like bullying, in physical education, plus investigated whether empathy mediated the possible relationships between caring and social behaviors for boys and girls. Method: Middle school physical education students (N = 528) completed measures assessing a caring climate, empathy, social behaviors, and bullying. Results: A partial mediation model was supported, χ²(94) = 206.82, p < .001, comparative fit index = .97, Tucker-Lewis index = .96, root mean square error of approximation = .05, standardized root mean squared residual = .04, which was also invariant across sexes. A perceived caring climate positively predicted prosocial behavior and cognitive empathy and negatively predicted antisocial behavior, like bullying. Cognitive empathy mediated the relationship between caring and prosocial behavior. Conclusions: Collective findings suggest that creating a caring climate is one tool that physical education teachers may use to promote positive behavior.     

关系结构的提升分析

本文在关系化提升理论框架下（Vries,2002）研究英汉语关系结构的句法生成。分析证明,关系化提升法对英汉关系结构的生成具有充分一致的解释力,英汉语带论元关系从句的关系结构其生成方式原则上相同,都是通过算子／空算子移位和核心名词提升操作生成的;区别在于,汉语关系结构的生成需增加最后一步“残余移位”（remnant movement）：把关系从句移至Spec—DP,以生成A结构;或者移人限定词与核心名词之间,生成B结构。