Probability Density Function Method for Observing Reconstructed Attractor Structure

Probability density function (PDF) method is proposed for analysing the structure of the reconstructed attractor in computing the correlation dimensions of RR intervals of ten normal old men. PDF contains important information about the spatial distribution of the phase points in the reconstructed attractor. To the best of our knowledge, it is the first time that the PDF method is put forward for the analysis of the reconstructed attractor structure. Numerical simulations demonstrate that the cardiac systems of healthy old men are about 6 - 6.5 dimensional complex dynamical systems. It is found that PDF is not symmetrically distributed when time delay is small, while PDF satisfies Gaussian distribution when time delay is big enough. A cluster effect mechanism is presented to explain this phenomenon. By studying the shape of PDFs, that the roles played by time delay are more important than embedding dimension in the reconstruction is clearly indicated. Results have demonstrated that the PDF method represents a promising numerical approach for the observation of the reconstructed attractor structure and may provide more information and new diagnostic potential of the analyzed cardiac system.     

一类Rossler系统的随参数变化的研究及其控制

通过对一类特殊的Rossler系统的定性分析与计算机模拟,研究了这类Rossler系统在参数影响下的各种变化,并且采用反馈控制完成了对其的控制.     

汉英表量结构中隐喻的分类及认知解读

以＂合成空间理论＂为理论背景,研究汉英表量结构中隐喻的分类与认知解读问题。根据输入空间的不同,从认知角度将汉英表量结构中的隐喻分为两类：显性隐喻和隐性隐喻。显性隐喻是通过＂量词＂和＂名词＂两个输入空间之间的概念整合进行建构的,而隐性隐喻是通过量词所描述的＂原型名词＂和表量结构中的＂名词＂两个输入空间之间的概念整合进行建构的。     

S1^n＋1中的一类Ⅲ型洛伦兹等参超曲面

研究洛伦兹空间型中的中的S1^n＋1Ⅲ型洛伦兹等参超曲面。通过对S1^n＋1中的洛伦技等参超曲面的互异的主曲率个数的研究来解决其分类问题,并研究其特点及性质。     

黑人女性的生存空间：评托妮·莫里森的小说《秀拉》

美国著名黑人女作家托妮·莫里森在其第二部小说《秀拉》中探讨了美国黑人女性所面临的因境：一方面作为个体,黑人女性渴望超越种族局限获得真正的个体自由;可另一方面作为黑人女性,她们在探求自由的旅途上却面临更多的阻力。《秀拉》通过对同名主人公秀拉命运的关注,为黑人女性摆脱因境提出了一条出路,那就是在黑人族群中找到发展自我的空间,从而储备力量,为争取更大的自由而努力。     

拓扑空间中的截口定理及其应用

将KyFan截口定理推广到具有性质（H）的拓扑空间．作为应用,在具有性质（H）的拓扑空间上进一步推广了Browder不动点定理,并利用所得结果在具有性质（H）的拓扑空间中证明了极大极小不等式定理和鞍点定理．     

HP3中共形极小曲面的几何

通过扭映射π：CP⁷→HP³构造出HP³中曲率为4/7,4/19,4/27的6个共形极小二维球面的例子.由于扭映射π：CP²ⁿ⁺¹→HPⁿ给出了CP²ⁿ⁺¹的水平极小曲面与HPⁿ中极小曲面的一个自然等同,利用Bolton等得出的在CPⁿ中常曲率共形极小二维球面的结论,根据CHEN Xiaodong和JIAO Xiaoxiang给出的HPⁿ中常曲率共形极小二维球面的一般方法,构造出HPⁿ中的共形极小曲面的例子.     

‘Playing with space’: a conceptual basis for investigating active sport tourism practices

ABSTRACT

This paper proposes a conceptual tool, the expression ‘playing with space’, for the analysis of active sport tourism as a meaningful social practice. The expression issues from practice theories and pragmatic understandings of space, which emphasize the processual and contextual dimensions of human action and seek to seize altogether the corporealities and shared conceptions that constitute action. On such views, sport tourists are considered as reflexive and embodied beings, enjoying sensations, mobilities and places, and constantly (re)making sense of their own practices. I argue that the notion of ‘play’ allows for a comprehensive understanding of the ways active sport tourists engage with space, where space is viewed as an object or material for this play. Three major dimensions of active sport tourism are then identified: a set of playful and game-like practices with global space resulting in shared imaginaries and large-scale mobilities; a kinaesthetic play, based on freedom and sensations and deeply engaged in the materiality of the places and the omnipresent media practices that support the other dimensions of play while being fully integrated into the experience of sport tourism. This conceptual framework is a way to better understand the motives and practices of sport tourists; it is also a way to underline wider trends of contemporary leisure cultures: such cultures are increasingly integrated into the daily spheres of activity, increasingly playful and increasingly mediatized.     

中国地域武术研究的现实困境及突破*

采用文献资料法、逻辑分析法等,在简要回顾研究进展的基础上,得出地域武术面临着地域数量“有限性”、空间边界“稳定性”、文本表达趋同性、研究方法滞后性等现实困境,造成了对地域武术浅层叙事和诸多曲解现状.突破现实困境需要我们具有地域空间重绘、地域纵向横向比较、交叉学科成果借鉴、多元方法引入等综合意识,形成动态地域武术观.     

城市化进程中的中国体育现状研究

摘要：城市化是国家经济制度、政治体制和社会形态发生变革的重要引擎,在体育领域,城市化进程的结束则标志着体育发展方式的重要转型。有鉴于此,以我国城市化进程中的体育发展现状为研究对象,主要采用文献资料法和比较分析法,结合英、美2国的实例,详细梳理城市化进程结束后,即城市化水平达到50%背景下,城市化对我国体育人口规模、体育空间布局、体育产业结构以及体育管理体制所造成的影响,其研究结果对于厘清现阶段我国体育发展的症结及未来我国体育改革的对策均具有重要的理论意义及实践价值。研究认为：城市化作为一种人类社会发展的普遍规律,始终影响着体育发展的进程与走向;城市化水平与体育发展的现实水平存在着高度的相关性,当城市化水平达到50%的时候,标志着体育将进入到一个全面转型的发展时期;我国已经进入到城市化进程过半的关键时期,城市化对体育发展方式的影响已经全方位体现出来,城市化引致的人口聚集成为了体育人口发展的基础,城市化引发的城市扩张导致了体育空间布局的整合,城市化催生的结构调整搭建了体育产业发展的平台,城市化激发的制度改革完善了管理体制发展的模式。