Understanding Chinese online users and their visits to websites: Application of Zipf's law

Competition for consumers to visit company websites has intensified in recent years. An important indicator of website popularity (and consequent survival) is the extent to which the website can draw consumer visits vis-à-vis other websites. A majority of the current understanding on consumer visits is limited to a single website, and leaves little knowledge on the performance of one website compared with others. In tracking the Internet usage behavior of 200 individuals in Mainland China for 30 consecutive days, we applied Zipf's law to identify the divergence points separating popular websites from non-popular ones. Two measurements were used, namely, visit traffic (number) and visit engagement (time spent). We observed that 94.87% of the entire visit traffic is devoted to 15.08% of all visited websites, whereas 84.63% of engagements are on the top 6.16% visited websites. These findings suggest that few websites accounted for the bulk of online traffic and time. Further, we segmented the dataset based on two key proxy variables of user demographics, which are gender and occupation. The findings on visit traffic remained salient after considering user segments, but the findings on website engagement varied across different user segments. Our further analysis, which categorized the visited websites by their main service, revealed the type of Internet users attracted to popular websites.     

一个工作流系统的设计及在OA中的应用

本文对工作流的相关概念做了简单的介绍,给出了一个工作流执行服务器架构设计视图,阐述了工作流的人员指派和发送短信通知参与者等在OA中的应用。     

对地方院校学分制下选修课建设的正视与思考

学分制作为一种教学管理制度,目前已成为高校教学改革的必然趋势。本文围绕地方院校在学分制改革中选修课建设存在的具体问题,结合地方院校的特点,从细处入手,大处着想,深入且整体地分析了问题产生的原因,指出了学分制下选修课建设问题是制约学分制发展的瓶颈,最后给出了解决问题的对策。其目的旨在引起地方院校更加重视学分制下选修课的建设,将工作做实、做精、做细,并为建设有特色、竞争力强的地方名牌院校提供一定的参考。     

不同干预时机冷水浸泡和全身冷冻疗法对运动表现影响的综述

近年来,冷水浸泡(CWI)和全身冷冻疗法(WBC)在运动领域的应用越来越多。它们被认为起到促进运动能力恢复、减少运动损伤发生、抑制运动中核心温度过快增加等作用。然而,这2种方式对运动能力的影响尚存争议。根据冷冻疗法的干预时机可以分为：运动前(预冷)、运动中或间歇、运动后。查阅近年来关于CWI和WBC对运动能力影响的相关研究,通过文献综述总结了在不同时机下2种身体冷却方法对运动能力的影响。     

Yangbajain Cosmic Ray Observatory -- The world''s largest experimental base on high elevation

Cosmic rays are flows of highenergy particles coming from the deep of the universe as material samples voluntarily making their way to the Earth from an extra-terrestrial origin. They are involved with some key, unsolved and long-standing puzzles on the cosmic history, evolution of celestial bodies,spatial environment etc. On the Earth's surface, the observation of the primary cosmic rays is to detect the groups of secondary particles resulting from the interaction between them and the atomic nuclei of the atmosphere - the extensive air shower (EAS).     

基于ACE反应式框架的服务器模型设计

本文应用ACE反应式框架的事件多路分离技术实现一个简单服务器模型的设计,着重探讨ACE反应式框架的内部结构,以及如何利用该框架去处理并发连接,对不同的事件类型进行多路分离,没有涉及具体业务层面的内容。     

The Development of a Computer-Assisted Career Guidance Programme for Singapore Schools

Super defines career guidance as “the process of helping a person to develop and accept an integrated and adequate picture of himself and of his role in the world of work, to test this concept against reality and to convert it into a reality with satisfaction to himself and benefit to society.” (Super 1957). This much quoted definition highlights two very important foci in career exploration - the development of career self-awareness and the acquisition of an understanding and knowledge of the world of work.     

超文本检索技术的发展

本文讨论了将超文本技术用于信息检索的优越性, 介绍并分析了基于导引浏览和基于提问的两种超文本检索系统中一些有代表性的模型及其检索方法, 认为超文本检索系统必须将超文本技术和传统的检索方法结合起来, 并向智能化方向发展。     

游泳运动、慢性应激及其交互作用对大鼠体重增长的影响

采用动物实验的方法,将SD雄性大鼠适应饲养一周后,随机分为对照组(C组)、应激组(S组)、运动组(E组)、运动+应激组(ES组)4组。实验共进行14周,前10周给与E组、ES组动物游泳运动,S组和C组动物正常饲养,后4周,给与S组和ES组动物慢性应激刺激,E组和C组与前10周一样饲养。观察游泳运动、慢性应激以及游泳运动和慢性应激的交互作用对大鼠体重增长的影响。结果显示,实验前10周,不运动的动物体重增长显著高于进行运动的动物(P<0.01)。实验后4周,S组动物体重增长显著低于其他3组,出现了负增长(-1.08±12.97,P<0.01)。ES组(17.91±6.85)动物体重增长显著低于E组(33.72±13.86,P<0.05)和C组(29.91±7.94,P<0.05),并且游泳运动和慢性应激在动物体重增长方面存在显著性交互作用(P<0.05)。结论:游泳运动具有保持正常体重、健身、减肥的功能;慢性应激刺激可以降低大鼠体重增长速度,甚至出现负增长;坚持长期游泳锻炼,一定程度上可以减缓因应激导致的体重急速下降,具有一定的抗应激作用。     

高校体育教育专业系统教育实习模式探究

采用文献资料法、系统分析法等研究方法,对我国高校体育教育专业实习现行模式进行归纳和总结,通过分析利弊,并结合笔者多年指导教育实习的工作经验和体会,总结出高校体育教育专业系统教育实习模式及其指导思想、原则和理论基础,以促进高校体育教育专业学生的教育实习质量。