Travel fatigue and jet-lag

Travel across multiple time zones is a common feature of the lifestyle of contemporary international sport competitors. This entails a disruption of the body's circadian timing mechanisms. Symptoms of ‘jet-lag’ persist until circadian rhythms re-tune into local time. Exercise performance may be impaired during the period of adjustment to the new time zone. Behavioural and pharmacological strategies are available to help accelerate the resynchronization of circadian rhythms. It is recommended that sports administrators should consider the consequences of jet-lag and the time needed to overcome it when planning the international itineraries of travelling athletes.     

教育考试处罚中比例原则的适用及其展开

教育考试处罚是打击违纪作弊等考试违规行为、实现考试公平的必要手段和有力保证,但在教育考试执法过程中也存在处罚不当的问题。引入并确立比例原则是弥补教育考试立法处罚实体规则不完备、规范自由裁量权以及保障考生合法权益的需要,其内涵包括考试处罚措施符合办考目的、实施特定处罚确有必要和处罚损益相互均衡三个层次。实践价值主要体现在契合依法治考的法治内涵,作为过罚相当的分析工具以及推进柔性执法三个方面。为保障考试竞争的公平性,应将比例原则纳入教育考试处罚立法的基本原则,细化违规行为处罚种类,构建专业化复核监督机制。     

Student-to-teacher violation and the threat to a teacher’s self

This paper is based on a study of fourteen Norwegian K-12 teachers who have been violated by students in schools. One key theme emerged during the process of analysis: the threat to the teachers’ self. This threat appears to be intensified due to lack of support. The findings in this small-scale Norwegian study indicate that student-to-teacher violation can have a serious impact on teachers’ perceptions of their individual and professional self. The findings disclose that the teachers’ self is affected leading to changed, weakened and disrupted experience of teachers’ self-understanding. This knowledge may influence how teachers can continue working when critical incidents occur.     

LDW-PSO算法及其在电网无功优化中的应用

利用LDW-PSO算法解决了输配电网的无功优化补偿问题。阐述了无功优化补偿的数学模型以及LDW-PSO算法优化步骤。工程实例验证表明,该方法降低了网损,且所有节点电压都满足要求,在节能降耗方面具有较大优势。     

永磁直线同步伺服电机的端部效应分析

现代高档数控机床对伺服进给系统提出了高速、高精度的双重要求,采用永磁直线电机直接驱动是实现机床高速、高精度进给的必要途径之一。然而,由直线电机端部效应引起的扰动,也成为影响着机床主轴系统性能的主要因素。本文系统地分析了永磁直线同步伺服电机的静态纵向端部效应、静态横向端部效应、动态纵向端部效应和动态横向端部效应的起因、机理及对电机性能的影响。     

从“学术规范”缺失看图书馆知识产权服务职责

本文指出目前学术规范缺失的主要原因在于相关教育的匮乏,作为与知识产权密切相关的图书馆应承担面向读者的知识产权服务职责,并提出了图书馆开展知识产权服务的方法和途径。     

高等教育自学考试的诚信危机及其化解路径

作为我国高等教育重要组成部分的自学考试制度,其有效运作的基础是诚信。当前,自学考试中诚信危机已日益凸显。本文从现实情况出发,循着自学考试中失信的具体表现与危机产生的根源,提出有效化解自学考试中诚信危机的策略,以建立健全自学考试制度,促进自学考试持续健康发展。     

Video over IP using standard-compatible multiple description coding: an IETF proposal

INTRODUCTION Communication networks are growing quickly. Throughput, delays and losses become unpredictable because of heterogeneity and congestion. This results in lack of quality of service. Today’s solution is based on standard video codecs (as MPEG-2) that do not allow scalability and yield low quality at low bit-rates, complex forward error correction (FEC) codes that are not easily used with time-varying channels and must be set to face the worst case, and automatic repeat re- q…     

损耗对光纤激光器抽运阈值的影响

根据含有损耗系数的速率方程组,求得了光纤激光器抽运阈值功率的显函数表达式。运用解析结果,采用数值方法分析了损耗对激光器抽运阈值的影响。并与前人的报道进行了比较,结果表明了损耗的存在会使抽运阈值变大。     

儒家文化的规范与失落——《白鹿原》的一种阐释

《白鹿原》是新时期以来第一部规模较大而又集中地探讨儒家文化的经典文本,本文对书中体现的儒家文化作了较为详细地阐释,同时又阐发了这种文化在各种条件的冲击下已逐渐失落,并对其失落的原因从自身和现实两方面作了较为详尽地分析。