开关磁阻电机功率电路的设计和保护

开关磁阻电机功率电路的强弱电保护是开关磁阻电机调速系统中的重要组成部分。通过对三相不对称半桥型功率变换器主电路进行分析,设计了开关磁阻电机调速系统过电流、过/欠电压、电力电子部件驱动掉电保护、功率电路看门狗保护等电路,自动判断功率电路过压、过流等故障,并产生相应措施来保护电机。实践证明,该系统能够在恶劣环境中保持长期可靠运行。     

Bibliotherapy for mental health service users Part 1: a systematic review

Aims and objectives: UK health policy advocates a patient‐centred approach to patient care. Library services could serve the rehabilitation needs of mental health service users through bibliotherapy (the use of written, audio, or e‐learning materials to provide therapeutic support). Part 1 of a two part article describes a systematic review of the evidence for the effectiveness of bibliotherapy in mental health services. Methods: The systematic review of the literature used Cochrane guidelines, together with an overview of evaluations of bibliotherapy initiatives, and assessments of the needs of adult mental health service users for rehabilitation support. Results: The evidence strongly suggests that library‐based interventions and the provision of information could be beneficial for service users and economical for the health service in assisting treatment of a range of conditions. At present, public libraries in the UK are developing basic bibliotherapy services. Conclusions: Librarians, including librarians working for the health service, might provide more sophisticated bibliotherapy services, but the evidence to guide delivery is limited.     

准备好应用网络教育的明日教师（上）

全球网（www.World Wide Wde)对教育系统的潜在冲击几乎是无限的。然而，如果我们的教师不具备适当的应用网络的知识和技能，实现的冲击会比可能的要小。证据表明，我们的教师需要培训，以便能够有效利用强大的在线资源，培养我们的孩子在数字社会中自我发展的能力。本文的目的在于探讨基于网络的教学对教师教育计划的冲击。     

The formative and summative uses of a Professional Development Portfolio: a Maltese case study

The paper examines the rationale and the uses of portfolios in initial teacher education. This rationale is then applied to explore the development and implementation of the Professional Development Portfolio (PDP) as an integral part of the initial teacher education programme offered by the Faculty of Education, University of Malta. The paper considers the responses of students and lecturers to this mode of assessment; in particular, how the tensions between the formative and summative functions of portfolios were experienced and responded to at institutional level. The paper is the result of the debates and discussions among the three authors. Deborah Chetcuti and Grace Grima were directly involved in the development of the assessment innovation, Patricia Murphy was a visiting academic and external examiner during the period.     

爱情的琥珀：情爱的生灵——《荆棘鸟》中梅吉与拉尔夫的性爱

人类的性爱问题是我们无法回避的问题。考琳.麦卡洛《荆棘鸟》就直接触及了人类生命中最隐秘的角落——两性交融的性爱。她通过对梅吉与拉尔夫之间性爱历程的描写,探索了人类男女间的性爱,赞叹梅吉与拉尔夫之间的性爱。梅吉和拉尔夫的性爱既有具体的激情,又有抽象的超脱,是激情与超脱的有机结合,是神圣与世俗完美的统一,是情与欲、灵与肉的完美融合和同步共振。     

高水平高职院校高层次人才引进及培养的机制研究

建设高水平高职院校是国家战略层面对高职教育发展提出的新目标和新要求。本文从高等职业教育的内涵及高水平人才队伍的特征视角,阐述了高层次人才引进的意义及其对高水平高职院校建设的作用,并就当前高职院校高层次人才引进及培养中的主要问题,提出了建立长效的人才培养和激励机制、协同创新搭建高层次人才发展平台、柔性引进企业高层次人才的管理机制等三方面的对策建议。     

垃圾：城市环境史研究的一个重要主题

城市环境史是环境史研究的新领域,它是环境史、城市史,技术史及公共工程史各自发展并有机融合的产物。它的成熟也有赖于对城市及城市环境的深入理解。垃圾问题是城市环境史的一个重要主题,其原因在于:垃圾问题是城市发展的产物,也是重要的城市环境问题;对垃圾进行历史研究既有助于理解人与社会的发展,也有助于现实城市环境问题的解决。尽管国外关于垃圾问题的历史研究已取得丰硕成果,但是相对于城市环境史的其他课题而言还显得比较薄弱,中国学界的相关研究更是欠缺。参考已有的成果,开展垃圾的历史研究应特别注意完善相关知识体系,拓展研究思路,借鉴其他学科领域的研究方法。     

The quality and frequency of mother-toddler conflict: links with attachment and temperament.

The goal of this study was to examine the links among attachment, child temperament, and the quality and frequency of mother-toddler conflict. Sixty-four mothers and children took part in a series of laboratory tasks when the child was 30 months of age and an audiorecorded home observation when the child was 36 months of age. All episodes of conflict were identified from the videotapes/audiotapes, transcribed, and coded for conflict strategies, resolution, and themes. Mothers also completed measures of attachment security and child temperament. Concurrent attachment security was related to the quality of mother-toddler conflict (including resolution, justification, and compromise) at both periods but not to the frequency of conflict. In addition, aspects of child temperament (i.e., negative reactivity and activity level/impulsivity) were related to both the quality and the frequency of mother-toddler conflict.