不同图灵模作用的几种斑图

采用双层耦合的CIMA模型,研究了不同图灵模相互作用时斑图的选择、形成机制.结果表明:当2个子系统分别处在超临界和次临界分岔点附近时,超临界图灵模和次临界图灵模相互作用产生耦合,得到六边形和超六边斑图;当2个子系统激发的图灵模均为超临界模时,二者之间不发生耦合,每个子系统各自形成简单的条纹斑图;当2个子系统激发的图灵模均为次临界模时,2个模产生相互作用,系统最终选择完全相同的豆角斑图.此外,图灵模的分岔类型还改变斑图的空间对称性.     

Experimental study on patterns of fault interaction

Based on the data of strain field, fault slip and acoustic emission during the deformation of some fault models, the fault interaction patterns are studied. The experiments reveal four patterns of fault interaction, i.e. static promotion or delay of earthquake, creep triggering, dynamic triggering and dynamic loading-relaxation. Promotion and delay of earthquake caused by fault interaction and mechanical property of fault combinations are preliminarily analyzed from the perspective of series and parallel connection of faults, and the relationship between patterns of fault interaction and mechanical and material properties of fault is discussed.     

Understanding individual human mobility patterns

Despite their importance for urban planning, traffic forecasting and the spread of biological and mobile viruses, our understanding of the basic laws governing human motion remains limited owing to the lack of tools to monitor the time-resolved location of individuals. Here we study the trajectory of 100,000 anonymized mobile phone users whose position is tracked for a six-month period. We find that, in contrast with the random trajectories predicted by the prevailing Lévy flight and random walk models, human trajectories show a high degree of temporal and spatial regularity, each individual being characterized by a time-independent characteristic travel distance and a significant probability to return to a few highly frequented locations. After correcting for differences in travel distances and the inherent anisotropy of each trajectory, the individual travel patterns collapse into a single spatial probability distribution, indicating that, despite the diversity of their travel history, humans follow simple reproducible patterns. This inherent similarity in travel patterns could impact all phenomena driven by human mobility, from epidemic prevention to emergency response, urban planning and agent-based modelling.     

艺术体操风格构建研究

对艺术体操的风格进行了阐述，认为艺术体操风格在体现选手综合能力和比赛成绩上起着十分重要的作用；结合近年优秀艺术体操选手的不同风格特点，阐述了艺术体操风格构建的艺术、技术特征及其展现，进而提出了我国艺术体操运动员形成鲜明风格的建议。     

教学原则在艺术体操实际教学中的体现

艺术体操作为一种运动项目,教师在教学时应遵循教学原则,并结合艺术体操本身的特点灵活运用,合理安排教材、教法,科学的进行教学,从而达到理性的教学效果。从艺术体操实际教学出发,阐述了教学原则在其实际教学中的体现。     

谈节奏能力的培养

节奏是影响健美操表现健与美的重要因素．没有节奏，健美操就失去了健与美的灵魂．培养学生的节奏能力是健美操教学的一个重要任务．本文对影响节奏能力的因素和提高节奏能力的方法进行探索，希望对健美操教学能有所启发和帮助．     

对艺术体操运动员竞技能力的分析

采用文献资料法对艺术体操运动员竞技能力构成因素进行了分析。突出了相应的训练方法和手段，为提高艺术体操技术水平提供参考依据。     

Global patterns in human consumption of net primary production

The human population and its consumption profoundly affect the Earth's ecosystems. A particularly compelling measure of humanity's cumulative impact is the fraction of the planet's net primary production that we appropriate for our own use. Net primary production--the net amount of solar energy converted to plant organic matter through photosynthesis--can be measured in units of elemental carbon and represents the primary food energy source for the world's ecosystems. Human appropriation of net primary production, apart from leaving less for other species to use, alters the composition of the atmosphere, levels of biodiversity, energy flows within food webs and the provision of important ecosystem services. Here we present a global map showing the amount of net primary production required by humans and compare it to the total amount generated on the landscape. We then derive a spatial balance sheet of net primary production 'supply' and 'demand' for the world. We show that human appropriation of net primary production varies spatially from almost zero to many times the local primary production. These analyses reveal the uneven footprint of human consumption and related environmental impacts, indicate the degree to which human populations depend on net primary production 'imports' and suggest policy options for slowing future growth of human appropriation of net primary production.     

艺术体操运动员的赛前焦虑及自我控制

赛前心理焦虑是运动员最常见的一种情绪体检。本文从运动员赛前产生焦虑的因素入手,结合作者多年从事艺术体操训练心得,提出了一些运动训练中对心理焦虑的自我调控方法,旨在为同行在今后的训练和比赛中提供参考。     

虚拟现实人机交互的eGOMS模型研究

采用心理学和计算机技术相交叉的研究方法,对人机交互中人的认知过程的人类视知觉特征和心理加工机制与特点等进行了细致的探讨;结合虚拟环境中人机交互过程的不确定性、连续性和实时反馈性以及交互可用性评价指标的多样性等特点,提出了适用于虚拟现实人机交互的扩展GOMS(eGOMS)模型,克服了传统GOMS模型要求精确的用户操作、交互界面与实际应用相分离及评价指标单一的不足.以eGOMS模型为基础对PIBG交互范式进行了评估,PIBG为VR用户界面提供自然、隐式交互的手段,从而大大降低了用户在虚拟环境下交互的认知负荷.     

试论艺术体操幼儿运动员的初级培养

采用文献研究法,问卷调查法,访谈法,以上海市长宁区艺术体操队5-6岁的幼儿运动员为调查对象,对艺术体操幼儿运动员的初级培养,包括选材,兴趣培养,专项技能,培养目标等方面进行调查研究。了解幼儿运动员初级培养的内容与方法,分析影响艺术体操幼儿运动员初级培养的部分问题。