Study on dynamic response of embedded long span corrugated steel culverts using scaled model shaking table tests and numerical analyses

INTRODUCTION On Jan. 17, 1995, the Hyogoken-nanbu earth-quake in Kobe, Japan, caused great destructive and damage to underground structures, such as subway structures, mountain tunnels, multipurpose under-ground ducts and other underground structures, which had previously been considered to be resistant to earthquake effects (JSCE, 1996; ECRHAED, 1998). This earthquake revealed that a number of critical issues should be added in the seismic design and seismic strengthening of undergr…     

竖直平面内圆周运动的临界速度问题

对竖直平面内圆周运动的临界速度进行了讨论，并对没有支撑物的物体在竖直面内做圆周运动的临界问题、有支撑物的物体在竖直面内做圆周运动、特殊条件下的物体在竖直面内做圆周运动的临界问题分别进行了举例分析。     

论安徽经济增长中的产业结构演变

立足于安徽经济增长与产业结构演变的历史,从供给与需求两个方面对安徽三次产业的发展状况、发展中存在的制约性因素进行了比较全面的分析,作者认为调整安徽产业结构,需要建立正确的结构调整思想,实行非均衡发展的赶超战略,当前特别需要注重制造业和农副产品加工业发展,为第三产业发展创造社会需要基础,拉动经济增长,促进第一产业劳动力转移.     

Teachers’ motives for learning in networks: costs,rewards and community interest

Background: This paper discusses teachers’ perspectives on learning networks and their motives for participating in these networks. Although it is widely held that teachers’ learning may be developed through learning networks, not all teachers participate in such networks.

Purpose: The theme of reciprocity, central to studies in the area of learning in networks, is often approached from a rational exchange perspective. This study attempts to extend this approach with reference to the concept of symbolic interactionism. The study was guided by the following research question: What is the relationship between teachers’ perceptions of learning networks and their motives for participation or non-participation in these networks?

Design and methods: In order to address this research question, semi-structured interviews among 25 teachers in secondary education in the Netherlands were carried out. The semi-structured interviews consisted of three parts: background information, perspectives on learning networks and personal experiences with those networks. Data were analysed qualitatively and analyses consisted of within-case analysis, and cross-case analysis of interview fragments. Three themes were considered: (1) perspectives on learning networks, (2) motives for participation perceived as rational exchange, (3) motives for participation perceived as related to social order.

Findings: The findings are presented around these three themes. Each theme is discussed in relation to relevant aspects from the literature. Findings indicated that teachers perceived learning networks to be organised both within-school and outside school, and mostly focused around specific content knowledge. Reasons for participation or non-participation were related to rational costs and rewards (such as time, technology, self-efficacy); in symbolic motives (such as joy, sharing and mutual understanding), and also in a sense of meaning that resulted from networking activities.

Conclusions: We conclude that, in addition to social exchange motives, the data suggest that symbolic aspects of communication and interaction play an important role in considerations for participation in learning networks. This may be described in terms of four ‘types’ of networking teachers: the Community focused networking teacher, the Locally focused networking teacher, the Not-yet-networking teacher, and the Non-networking teacher. It is hoped that these exploratory findings could be helpful in supporting the development of learning networks for all teachers.     

案例培训法与校长培训的实效性

案例培训法将现实中的问题作为案例,通过组织参训校长的分析讨论以提高其分析能力、判断能力、解决问题以及执行学校政务的能力。根据组织行为学的学习分类理论,案例培训拟分为代理性和亲验式案例分析。     

明清家庭家族长篇小说的文化解读

家庭家族类题材长篇小说的流变包含有丰富的文化意蕴,体现着小说创造主体深切关注社会现实的创作心态,揭示了封建社会后期整个社会处于没落状态的悲凉的时代氛围。深入剖析那个时代的作品中的人物和创造这些作品的作家,把握明清家族家庭长篇小说作品所体现出来的深刻的文化内涵。     

Implications of Overlapping Difficulties in Mathematics and Reading on Self-Concept and Academic Achievement

In this study, the relationship between adolescents’ difficulty in mathematics and reading and the influence on academic self-concept and school grades was examined. The participants (N = 585; 299 girls, 286 boys) were one age group of ninth-graders whose mathematics and reading skills were assessed at the end of comprehensive school at age 16 years. Five student profile groups were found using cluster analysis: best achievers, normal achievers (NA), the reading difficulty (RD) group, the mathematical difficulty (MD) group, and the learning difficulty (LD) group. Post-hoc tests revealed that the RD group and the LD group had a higher academic self-concept than the MD group. In school grades history, surprisingly, the NA group and the RD group performed equally well across all school grades. Students in the MD group performed as poorly as the LD group. The results emphasise the prolonged and generalised effects of especially MD on students’ academic careers.     

语篇分析与大学俄语写作教学

写作能力的培养是大学俄语教学中一个重要的环节在写作教学中，除了教授学生利用准备的词句来表达自己的思想，突出主题外，还要使学生采用一定的写作手法，按一定的逻辑顺序将符合文章主题的各种信息材料组织成主题突出，语义连贯，结构严谨，文章流畅的篇章结构。本文从培养学生的句子意识，段落意识和篇章意识三个方面来探讨提高写作能力问题。     

我国企业应收账款风险度量模型与实证分析

对我国企业的应收账款风险与企业信用政策变量及信用管理努力分别进行回归分析,并对回归结果的原因进行探讨,揭示了我国企业目前应收账款风险控制管理的效果和特点,对合理构建我国企业应收账款风险控制体系提供有益启示。     

快速预测卤素氧化还原产物

卤素的价态变化较大，在氧化还原反应中，很难准确、快速地判断产物的存在形式。本主要介绍全位分析法快速，准确预测卤素氧化还原中的产物，以便在工艺设计中准确确定主反应、副反应，更好地为科研和教学服务。