三相异步电动机Y-△降压起动的PLC控制线路设计

针对三相交流异步电动机在额定电压下直接起动时存在的弊端,通过PLC中的定时器及互锁、连锁等保护手段对电动机Y-△降压起动加以控制,从而避免操作不当或误操作而引起事故。这里主要讨论改进后的继电器接触控制电气原理图,对应的I/O配置接线图,PLC梯形图,部分程序,并对改进后的原理进行分析,从而得出采用PLC控制的Y-△降压起动的优越性。     

浅谈高校交往空间设计

文章首先对我国高校交往空间的基本状况做了简要的介绍,探讨了从空间形态的整体性、多样性、可生长性等方面塑造高等学校交往空间的可能性。     

Bringing together acculturation theory and intergroup contact theory: Predictors of Flemings’ expectations of Turks’ acculturation behavior

The present paper explores Flemish majority members’ expectations concerning the acculturation of Turkish minorities. We studied two kinds of antecedents: majority members’ perceptions of Turkish minorities’ acculturation behavior and their experiences of intergroup contact. The possible mediating role of outgroup affect was also investigated. 247 Flemish high school students completed a survey. Data were analyzed using path analyses. Results show that positive contact experiences and perceiving that Turkish immigrants make efforts to engage in contact with the host group and/or to adopt the host culture are associated with less negative affective reactions towards Turkish migrants. Perceiving that Turkish immigrants maintain their heritage culture is associated with more negative affective reactions. Our results further revealed that increased negative affective reactions are associated with less support for culture maintenance and for contact with the host group but with a higher demand for host culture adoption. The present results also show that expectations of contact engagement and expectations of host culture adoption cannot be considered as equivalent. This implies that results from studies using Berry's conceptualization of acculturation expectations (Berry, 2001) and results from studies using Bourhis’ conceptualization of acculturation expectations (Bourhis, Moïse, Perreault, & Senécal, 1997) are not directly comparable. Our data also clearly disconfirm the orthogonal structure of the fourfold acculturation model for majority members’ acculturation expectations, suggesting that relying on the specific dimensions defining acculturation expectations may constitute a more valid approach to understand ongoing acculturation processes.     

高速铁路运营过程中的关键问题：轮轨磨耗等

随着高速铁路运营里程和列车运营速度的不断增长,出现了一些和列车轨道耦合大系统密切相关的关键科学和技术问题。这些问题不仅影响到列车的运行品质,甚至威胁到安全运行,是当前高速铁路运用和发展中急需解决的问题。本文系统描述了高速铁路在运营过程中所出现的一些关键科学和技术问题,并述评了全世界有关这些问题的研究进展、现状和不足之处,提出了今后有利于认识和解决这些问题的发展方向。在长期高速运营的铁路大系统环境中,这些问题的形成的机理、发生、发展过程和预防措施的研究,需要从列车／轨道耦合大系统运营环境（速度、路况、气候和运用维修）、系统的自身参数匹配、材料选用和运营成本等全面系统考虑,并从理论、技术、工艺、监控和维修等方面解决。     

从合作原则看《赛来恰坎笑话选》中的幽默

幽默语言作为幽默的主要表现形式在我们的生活中很常见。言语幽默是语言的精粹,在日常生活中言语幽默的应用使人们在笑声中启迪思想,交流感情,拉近彼此的距离。论文利用格莱斯的合作原则来探析《赛来恰坎笑话选》中的幽默效果。     

研究生非正式学术性社团生存与发展的质性研究——以H大学为例

研究生学习具有成人学习的特点,非正式学习占主要部分。非正式学术性社团是一种基于兴趣、围绕相关学术问题、定期开展学习活动的小组,是由学生自发组织、自我管理和教育的学习组织,对于提高学生专业素养、改善学习风气、提升学生综合素质具有重要的作用。基于此,以H大学中的相关群体为例,通过访谈,了解当前研究生非正式学术性社团的现状与问题,进而提出相关建议。     

浅析新农合与城镇居民医保的并轨问题

随着我国社会经济的快速发展,在现行的基本医疗保障体系下不断出现一些问题与矛盾.医疗保险是我国社会保障体系的重要构成部分.它直接关系到全体国民的医疗健康问题.文章对新农合与城镇医保制度在实施过程中出现新问题做出研究.通过对新农合与城镇居民基本医疗保险两种制度并轨的可行性和目前部分地区并轨试点现状的分析基础上,提出并轨新型农村合作医疗和城镇居民医疗保险两种制度的一些个人建议.     

Exploring the Relations between In-service Training,Prior Contacts and Teachers’ Attitudes towards Persons with Intellectual Disability

This study investigates the relations between teachers’ attitudes towards persons with intellectual disability (ID), in-service training on ID, and prior contacts with persons with ID. A sample of Canadian elementary school teachers (N?=?118) completed the Attitudes Toward Intellectual Disability Questionnaire, which measures cognitive, affective and behavioural components of attitudes towards persons with ID. Correlational and multivariate regression analyses were performed. Frequent contacts with persons with ID and experience of including a child with ID increased the likelihood of reporting prior positive contacts with persons with ID. In turn, this was associated with less discomfort towards persons with ID and more willingness towards interactions. In-service training on ID was related to better knowledge of rights and capabilities of persons with ID. Experience of including a child with ID in general education classrooms increased the likelihood to report feeling competent in teaching children with ID, which predicted more willingness to include children with ID.     

职业教育中学生的能力培养研究

当代大学生的能力包括认知能力、操作能力和社交能力三种,我们通过分析教学过程中知识、技能和能力之间的关系,提出了通过知识传授培养学生认知能力和社交能力、通过技能训练培养学生实践操作能力的方法和途径,提高了学生适应各种不同工作岗位的综合素质,增强了学生从容面对新岗位、新问题挑战的自信。     

基于混合神经网络编队协同空战决策支持系统

针对缺少先验知识的前提下,提出一种混合神经网络编队协同空战决策支持系统,同时采用一种无教师—有教师的混合训练算法来训练混合神经网络。仿真结果表明该系统的有效性。