中国女子水球队与世界一流强队的比较分析

本文结合2008北京奥运会女子水球比赛、2008世界女子水球联赛总决赛和2008欧锦赛女子水球比赛中的相关数据,来综合比较分析中国女子水球队和世界女子水球强队的差距,分析得出中国女子水球队需要加强关键球处理的训练;加强扩大防守、破扩大防守的训练,以及加强防守阵型的应变性;进一步提高"6打5"、"5防6"的成功率;重点提高中锋的门前拿球射门能力和外线队员中远距离的射门能力;加强队员得球后下快攻的意识和防反意识;提高队员比赛时对裁判员判罚的阅读能力。     

Kinematic analysis of the backstroke start: differences between backstroke specialists and non-specialists

Abstract

The purpose of this study was to clarify factors to perform the hole-entry technique in the backstroke start. A total of 16 well-trained Japanese competitive swimmers were divided into two groups (backstroke specialists and non-specialists) to compare their backstroke start motions. Their backstroke motions were videotaped, and two-dimensional co-ordinates for the swimmers were obtained from the video images using direct linear transformation methods. A non-paired t-test and Mann–Whitney U-test were used to analyse the statistical difference of the kinematic variables between the groups. Backstroke specialists showed a significantly shorter 5 m time (P = 0.009, effect size = –1.54), a significantly higher position of the toe (P = 0.010, effect size = 1.47) at signal and of the hip at toe-off (P = 0.002, effect size = 1.94), a significantly larger hip joint angle at toe-off (P = 0.007, effect size = 1.60) and a significantly higher angular velocities of the hip joints (45–85%; P < 0.05) for the normalised time as compared to that of non-specialists. An earlier initiation of the extension and the maintenance of a higher extension speed at the hip joints were important factors in achieving an arched-back posture, which facilitated and water entrance with a small entry range.     

湖库型饮用水安全与生物处理策略

饮用水污染问题日趋严重,本文根据莆田市环保局的统计数据,分析了饮用水污染的原因,提出了利用生物技术对饮用水源进行保护和水质净化,以保障饮用水安全.     

Imagining a future,living in the present and remembering the past

The remit for this short piece was to identify themes emerging from the articles in this edition by Julie McLeod, Duncan Waite and Eugenie Samier, to consider how these themes reflect on the current field, and to identify their ongoing relevance. Additionally, I was asked to consider the current challenges that the field is facing and what this means for research and journals such as this one. My short response is that our research has to matter. It has to matter to us as individuals so that what we do is worthwhile; it has to matter that we can provide rigorous research that is reliable so that it can inform policy makers and administrators; and it has to provide teachers and students with a greater understanding of why they are doing what they are being asked to do.     

浅析工程机械柴油发动机润滑系统故障及润滑管理

柴油发动机的润滑系统常见故障为机油耗量过大、压力偏高或偏低、温度过高等.建立完善的润滑管理体系,加强日常维修保养,可延长发动机寿命,提高工程施工机械效率.     

从认知隐喻角度看《诗经》婚恋诗中的水意象

随着认知语言学在过去几十年的发展,人们普遍认识到隐喻不仅仅是一种修辞手段,更是一种认知和推理的过程。本文以《诗经》婚恋诗中的水意象作为研究对象,旨在探索和验证隐喻作为人类思维和认知方式的普遍性及其存在程度,并探求这些隐喻能否在一定程度上反映人类认知的共性。     

教务管理系统中成绩统计管理的设计与实现

采用目前流行的计算机网络技术、B/S（Brower/Server）三层软件架构体系、应用ASP（Active ServerPages）动态网页开发技术及后台数据库SQL Server 2005,建立了基于全校的教务管理系统.     

新疆塔里木河下游生态输水对地下水位和水质的影响

本文结合塔里木河下游六次生态输水过程（2000年～2004年）和对40眼地下水监测井水质分析资料，重点研究了塔里木河下游生态输水对地下水位和地下水质的影响以及地下水位与水质的变化关系。研究结果表明：塔里木河下游地下水位和水质状况随六次间歇性生态输水发生明显变化。河道两侧地下水位埋深在输水过程中明显抬升，由输水前的8m～11m，抬升到5m～6m；地下水质表现为：在输水初期，地下水水化学成分中的主要离子含量和矿化度都较高，随着生态输水的实施，矿化度开始下降，下降幅度先快后慢。其中在距河道不同位置处，由于受输水影响强度的差异和地下水位抬升状况的变化，地下水矿化度的变化特点不尽一致。但总体表现为随着地下水位的抬升地下水矿化度不断下降的趋势。     

高等教育适应入世要求的差距分析及对策探讨

适应加入WTO形势，我国高等教育必须针对立法和教育行政管理方面入世要求存在的差距，建立和完善与WTO规则对接的教育法规体系，转变教育行政管理职能。包括从教育参与者向“教育市场”秩序维护者转变，从客观行政管理向宏观调控转变，从集权向集权分权相结合转变，从全能管理向有限管理转变等。     

美国高校学生事务管理的观点、实务及其启示

美国大学和学院十分重视学生工作。学生事务及其管理一直被认为是美国高等教育的重要组成部分。在这种观点的指引下，美国高校学生事务已经形成了相对完善的内容体系。我们从中可获得改革我国高校学生工作的一些启示。