高校图书馆持久标识符应用研究

为了实现高校图书馆数字资源的持久标识,促进系统间互操作性的增强,本文对持久标识符进行了广泛深入调研,对当前应用最为广泛的4种持久标识符的原理和国内外应用情况进行了梳理,从费用、使用量、互操作、标识符与元数据四个方面对其做了全面地比较分析。结合北京大学图书馆的实际情况,介绍了持久标识符在开放研究数据平台、机构知识库、系统间互操作上的应用。     

Probing of coupling effect induced plasmonic charge accumulation for water oxidation

A key issue for redox reactions in plasmon-induced photocatalysis, particularly for water oxidation, is the concentration of surface-accumulating charges (electrons or holes) at a reaction site for artificial photosynthesis. However, where plasmonic charge accumulated at a catalyst''s surface, and how to improve local charge density at active sites, remains unknown because it is difficult to identify the exact spatial location and local density of the plasmon-induced charge, particularly with regard to holes. Herein, we show that at the single particle level, plasmon-coupling-induced holes can be greatly accumulated at the plasmonic Au nanoparticle dimer/TiO₂ interface in the nanogap region, as directly evidenced by the locally enhanced surface photovoltage. Such an accumulation of plasmonic holes can significantly accelerate the water oxidation reaction (multi-holes involved) at the interfacial reaction site, with nearly one order of magnitude enhancement in photocatalytic activities compared to those of highly dispersed Au nanoparticles on TiO₂. Combining Kelvin probe force microscopy and theoretical simulation, we further clarified that the local accumulated hole density is proportional to the square of the local near-field enhancement. Our findings advance the understanding of how charges spatially distribute in plasmonic systems and the specific role that local charge density at reaction sites plays in plasmonic photocatalysis.     

共素“稀”组同义形容词释义研究

以“稀薄”、“稀少”、“稀疏”这组词在朱景松主编的《现代汉语同义词词典》的释义为参照,从词义个案和词义关联两方面,对其释义加以细化和补充,以更加突显词语的个性和词群的共性内容,以便更好地指导运用祖国语言及进行对外汉语教学。     

Learning a subspace for clustering via pattern shrinking

Clustering is a basic technique in information processing. Traditional clustering methods, however, are not suitable for high dimensional data. Thus, learning a subspace for clustering has emerged as an important research direction. Nevertheless, the meaningful data are often lying on a low dimensional manifold while existing subspace learning approaches cannot fully capture the nonlinear structures of hidden manifold. In this paper, we propose a novel subspace learning method that not only characterizes the linear and nonlinear structures of data, but also reflects the requirements of following clustering. Compared with other related approaches, the proposed method can derive a subspace that is more suitable for high dimensional data clustering. Promising experimental results on different kinds of data sets demonstrate the effectiveness of the proposed approach.     

谈体育教学中学生的心理障碍及消除措施

学生心理过程伴随着整个体育教学过程 ,并随着教学过程的变化而变化 ,体育教师应针对学生的实际情况 ,分析和研究学生心理障碍产生的原因 ,找出消除心理障碍的措施和办法。这对于提高体育教学质量和效果有着重要意义和作用。     

普通高校三级跳远运动员运动损伤的调查与分析

文章采用访谈调查、综合分析等研究方法,对苏州大学35名三级跳远运动员的运动损伤进行研究,探讨普通高校三级跳远运动员损伤发生的规律,以预防运动损伤。结果显示:运动员损伤多发部位为足部、踝关节、膝关节、腰部等;损伤类型以韧带和肌肉拉伤、肌肉劳损居多;损伤性质主要是急性损伤;在技术、速度训练中运动损伤比例最高;准备活动不充分、训练安排不合理、身体疲劳、技术动作不规范等是损伤发生的主要原因。     

西南地区职业女性参与体育健身现状及发展对策研究

西南地区部分职业女性参与体育健身状况总体上呈积极向上的趋势。目前存在的主要问题是：健身观念意识的片面性、健身内容的单一性、组织管理的薄弱性、科学健身指导的缺乏性、运动场所建设的滞后性、云、贵、川、渝发展的不平衡性。今后的发展策略应立足于：加强对职业女性终身健身理念和正确健身观念的宣传。大力倡导科学健身，广泛推广科学健身的知识、方法和手段。各企事业单位主管体育的部门，对职业女性健身活动应采取主动积极的组织管理措施。     

日本古代骑射的历史轨迹与现代传承--兼谈"以心传心"的精神追求

骑射是从战争与狩猎活动演进而来的一项体育运动,在许多国家都曾广泛开展,日本古代的骑射运动也很繁盛,并且传承至今。笔者2004年在筑波大学进修时,有幸随同指导教官观摩过骑射表演,而后又在听课学习的过程中加深了了解。现将文献记载与个人观感结合在一起,将日本古代骑射的历史轨迹与现代传承情况勾勒出来,并简要分析日本人在参与这项传统体育活动时表现出来的精神追求。一、骑射的称谓及其历史渊源骑射本是骑在马上射箭的意思,在一些国家或民族当中仅使用这一个称谓,而在日本,既有骑射的统称,又根据形式上的不同各有其特殊的名称,概括起来…     

WTO与素质教育

中国正面临着加入WTO后新的国际环境,如何适时地转变教育指导思想、制定合理的教育政策对中国未来经济的发展起着决定性作用。国运兴衰,系于教育,系于高质量的素质教育。