JJF-Z1型智能化1″光栅分度头的研制

本文介绍了如何应用微型计算机技术使1″光栅分度头本身智能化,再配置适当装置与IBM计算机联网,从而实现了角度及与角度相关的测量工作全部自动化。     

Target Specificity of Subjective Relationship Measures: Understanding the Determination of Item Variance

The present study was conducted to test the ability of two subscales from the Friendship Quality Questionnaire (FQQ; Parker & Asher, 1993 ) to discriminate between different target friendships. This was done by testing for mean differences between targets, and by using both exploratory and confirmatory factor analyses to examine the factor structures for these measures when the responses for different targets were considered together. Participants were 293 Italian middle‐school students. Both subscales (Validation and Caring, and Conflict and Betrayal) showed mean differences between the best friend and the second and third best friends, but only the validation and caring subscale demonstrated differences between the second and third best friends. Factor analyses showed that for both subscales some items were able to discriminate between friends whereas others were not. Confirmatory factor analyses demonstrated the existence of target‐specific factors, as well as a common ‘individual differences’ factor. Practical and theoretical issues regarding the different sources of item variance are discussed.     

The dynamics of time use: Context and meaning

In this article, earlier work on the organization of the household day is revisited to bring a sociological perspective to the study of household time. There is much to be gained from elaborating the conceptualization and measurement of time use to acknowledge and the employment of its dynamic qualities and meanings. That is, analysis of household time use must become far more than a longitudinal accounting process. In this article, no roadmap to such a destination can be provided but perhaps movement in a new direction. The practical application of insights from research on household time use requires conceptual frameworks that allow household time to be depicted as it unfolds and as participants experience it. That is, serious attention might be lent not only to studying where time is spent but also to how activities are situated and experienced in time to realize human affairs.She is the author ofThe Gender Factory: The Apportionment of Work in American Households, and in 1995 she coeditedindividual Voices, Collective Visions: 50 Years of Women in Sociology, published by Temple University Press. Her current work focuses on the theoretical articulation of race, class and gender in women's work.This paper required a good deal of reflection on a project I undertook with Richard A. Berk in 1975. I am grateful for his comments and suggestions.     

Personality and coping as moderators of work stress processes: Models, methods and measures

This article reviews the role of individual differences in work stress processes, with particular reference to personality and coping as moderator variables. Vulnerability/resilience and person-environment fit (congruence) models of moderator effects are contrasted and relevant issues of methodology and analysis are outlined. Personality traits (locus of control, hardiness, Type A, optimism, and neuroticism) that act as moderators of stress/strain relations are reviewed; the characteristics and limitations of available measures are described. Associations between personality and coping, inventories for the assessment of coping, and the dimensions of coping behaviour, are then considered. The implications of structural and transactional models of stress for coping assessment are discussed with reference to dispositional versus situational approaches and other psychometric issues. The need for research into coping flexibility and consistency is emphasized. No attempt is made to provide a comprehensive account of empirical research into individual difference moderator effects, but relevant review articles are cited, together with some recent studies. Finally, several areas which would merit further attention (including specificity of moderator effects, conjunctive and disjunctive patterns, and moderation of relations between objective and perceived stressors) are identified.     

偏心摄影验光法测量屈光度的不确定度分析

对偏心摄影验光法测量屈光度进行了不确定度分析，指出过渡区的存在，眼瞳边缘的模糊，以及虹膜与暗区难以辊不确定度偏大的主要原因。推出了不确定度计算公式，并计算了不同近视模型眼屈光度的合成标准不确定度，提出了解决本法不确定度偏大的根本手段，即寻找新的直接测量量来代替暗区上下端纵坐标。     

A preliminary investigation of post-traumatic stress symptoms among firefighters

Emergency service personnel are at high risk of developing post-traumatic stress disorder (PTSD). However, there is little in-depth information on the psychological responses of firefighters to the daily incidents that they attend. This preliminary study aimed to investigate the PTSD symptoms of firefighters in relation to traumatic events experienced by them, and the availability of social support. Thirty-one UK fire service workers completed an adapted version of the Post-traumatic Diagnostic Scale (PDS; Foa, 1995) to investigate the existence of post-traumatic stress disorder (PTSD). They were also individually interviewed to explore the symptoms they had experienced, what events these were related to, types of social support and coping strategies. Two participants reached the DSM-IV criteria for PTSD. Rumination and sleep disturbance were the most commonly reported PTSD symptoms. Participants reported high levels of social support from within the service and outside. The results suggest that fire service personnel are at risk of developing some symptoms of PTSD; however most had not experienced severe enough symptoms for PTSD to be diagnosed. The study suggests that high levels of social support may play a role in buffering firefighters from the development of PTSD.     

H_(01)~○—H_(10)~□高功率定向耦合器的改进设计

提出了一种从圆波导 TE_(01)模到矩形波导 TE_(10)模的定向耦合器的设计方法。利用这种方法设计的用于高功率回旋速调管的-50dB 定向耦合器表明,改变矩形波导尺寸可以提高对圆波导 TE_(11)模的抑制度,而调整最后两个耦合孔的距离则可以优化方向性。     

圆光栅细分误差的动态测量

本文讨论了圆光栅细分误差及其测量,提出了不采用高精度标准件的圆光栅细分误差测量法——时间平均法,并通过实际测试结果证明了时间平均法的可行性。     

水库移民最低生活保障线测算研究

水库移民在搬迁后面临着极大的社会经济风险,所以构建水库移民的最低生活保障体系是移民社会经济系统重建的重要环节,而水库移民最低生活保障线的测算是关键的部分。笔者从测算原则入手,建立了水库移民最低生活保障线测算的指标体系和数学模型,并结合算例进行了计算。     

机构设置导致的跨国银行操作风险度量研究

操作风险的准确度量是操作风险有效管理的前提。风险损失包括预期损失和非预期损失,对于可示损失采用Delta方法进行度量,对于控制失效或外部事件引起的超额损失,则用EVT方法进行计算,再利用门槛值将两者结合起来,可以较准确地度量分行在经营过程和向总行传递过程中由于机构设置不合理导致的操作风险,从而更合理地为这部分的操作风险分配经济资本。