共查询到20条相似文献，搜索用时 46 毫秒
1.
The analyses of finite deformation and stress for a hyperelastic rectangular plate with some voids under an uniaxial extension were conducted. The governing differential equations were given from the incompressibility condition of the material. The solution was approximately obtained from the minimum potential energy principle. The growth of voids was discussed. One can see that an initial central circular-cylinder void becomes an elliptic-cylinder void, but an initial non-centeral circular-cylinder void becomes an elliptic-like cylinder void and the center of void has a shift. The stress distributions along the edges of voids were given and the phenomenon of stress concentration was observed. The influences of the distribution manner and size of voids, as well as the distance between them on the growth of voids were analyzed. 相似文献
2.
Rachel Toplis 《Educational Psychology in Practice》2006,22(1):53-67
This study used an ABAB design to investigate the effectiveness of social stories as an intervention with five school children who were experiencing difficulties at school lunchtime related to independently entering the dining hall. Measurements of general behaviour using the Conners’ Teacher Rating Scale‐Revised (CTRS‐R:L): Long Version and social cognition were also taken. The results showed an increase in targeted behaviour when social stories were used for three of the five children. The profile of results from the CTRS‐R and social cognitive tasks indicated that social stories were an effective intervention for children who had poor social skills and difficulties understanding the perspective of others. 相似文献
3.
The paper reports a study on the values of 15‐year‐old pupils and their teachers, and also their beliefs about the values of an ideal pupil. The sample included Finnish comprehensive school pupils (n = 406, mean age 15.3 years) and their teachers (n = 124). The study centred on two questions concerning: (1) what values are important to pupils and teachers; and (2) what pupils and teachers imagine an ideal pupil in their school values. Values were measured according to Schwartz's value questionnaire, which includes 57 single values grouped into 11 general value types. The subjects were asked to fill in the questionnaire twice. Firstly they were asked to consider what values were important to them as guiding principles in their life. Then they were asked to answer the questions as they imagined an ideal pupil in their own school would. The results showed that the most important value types were similar for pupils and teachers; for example, both groups valued benevolence and universalism. The differences between pupils’ and teachers’ images of an ideal pupil, in contrast, were more distinct. Pupils imagined an ideal pupil to be obedient, polite, capable, intelligent, ambitious, wise and respectful of parents and elders, while teachers imagined an ideal pupil to be honest and broad‐minded, valuing self‐respect, family security, true friendship and meaning in life. The results are discussed in terms of the general aims of curricula and the key values of schools. 相似文献
4.
Salim Abu‐Rabia 《教育心理学》2004,24(5):711-721
This study investigated the relationship between foreign language (FL) anxiety and achievement in that language. The role of the FL teacher as perceived by the learners was also tested. Participants were 67 seventh‐grade students. They were administered an anxiety questionnaire, a Hebrew reading comprehension test, an English reading comprehension test, an English creative writing task, and an English spelling test. The results indicated that anxiety was negatively and significantly correlated to FL achievement on all FL tests. Gender and teachers' attitudes were the only significant predictors of FL anxiety among these seventh‐grade students. The results are discussed in light of findings in the literature. Some recommendations are suggested to ease anxiety in FL students. 相似文献
5.
John Haugan Marius Lysebo Per Lauvas 《European Journal of Engineering Education》2017,42(6):1408-1421
Formative assessment can serve as a catalyst for increased student effort and student learning. Yet, many engineering degree programmes are dominated by summative assessment and make limited use of formative assessment. The present case study serves as an example on how formative assessment can be used strategically to increase student effort and improve student learning. Within five courses of an engineering bachelor degree programme in Norway, the mandatory coursework assignments were removed and replaced by formative-only assessment. To facilitate the formative assessment, weekly student peer-assessment sessions were introduced. The main findings include an increase in student study hours and improved student performance on the examinations. Finally, interviews were conducted by an external consultant in an effort to identify key factors that attributed to the positive outcome. 相似文献
6.
Brittle cracks were observed in the welded beam-to-column connections of steel frames during an earthquake. The crack propagation and accumulated damage to the connections can lead to fractures at much lower ductility ratios. Understanding the connections’ damage behavior during an earthquake is crucial for the design of steel moment frames in seismic areas. Nine full scale beam-to-column connections were tested under constant amplitude and variable amplitude cyclic loading. The effects of loading amplitude, loading history, and peak load on the connection damage were analyzed. The damage characters were studied and three damage evolution models were calibrated and validated based on test results. The damage mechanism was investigated and an effective plastic strain index was developed to evaluate connection damage based on a ductile fracture mechanism. A fatigue fracture mechanics-based model, for evaluating the damage process of beam-to-column connections under cyclic loading, was proposed. 相似文献
7.
Pigeons were trained on an operant procedure to discriminate between morning and afternoon when location did not vary (Experiment
1). The pigeons were placed on a fixed interval (FI) schedule in the morning and on a different FI schedule in the afternoon.
Probe trials that occurred at the beginning of the training sessions were examined. The pigeons responded differently, depending
on the time of day, reflecting the learning of a stable 24-h memory representation of the association between the FI schedules
and the time of day. The pigeons from Experiment 1 were then clock shifted and tested twice, to determine whether they were
relying on an endogenous circadian oscillator, an hourglass mechanism influenced by the photoperiod, or environmental noise
to make the time-of-day discrimination (Experiment 2). The results of the second experiment indicated a circadian mechanism
was most important for the observed time-of-day learning. 相似文献
8.
9.
10.
Low frequency vibrations induced by underground railways have attracted increasing attention in recent years. To obtain the
characteristics of low frequency vibrations and the low frequency performance of a floating slab track (FST), low frequency
vibration tests on an FST in an underground laboratory at Beijing Jiaotong University were carried out. The FST and an unbalanced
shaker SBZ30 for dynamic simulation were designed for use in low frequency vibration experiments. Vibration measurements were
performed on the bogie of the unbalanced shaker, the rail, the slab, the tunnel invert, the tunnel wall, the tunnel apex,
and on the ground surface at distances varying from 0 to 80 m from the track. Measurements were also made on several floors
of an adjacent building. Detailed results of low frequency vibration tests were reported. The attenuation of low frequency
vibrations with the distance from the track was presented, as well as the responses of different floors of the building. The
experimental results could be regarded as a reference for developing methods to control low frequency vibrations and for adopting
countermeasures. 相似文献
11.
赵光怀 《河南师范大学学报(哲学社会科学版)》2005,32(4):89-92
司法从属于行政,这历来是中国古代政治制度的一大特色。汉代各级政府中均设有专门负责司法的掾吏．我们统称之为“狱吏”,他们是汉代司法系统的重要组成部分。汉王朝对这些狱吏十分重视．贵治狱之吏为汉代政治的一个重要特征。在汉代．这些“狱吏”不仅在司法运作中发挥着重要作用,还影响到社会生活、政治生活中的许多方面,对汉代社会产生了重要影响。 相似文献
12.
Scaffolding provides content-area teachers (CATs) with an effective means to integrate language instruction into content-area instruction for English language learners (ELLs). Data for this study were derived from 33 CAT discussions while they were pursuing professional development in an American university classroom over 32 weeks. The discussions yielded 408 scaffolding statements that were coded and analyzed. The findings identified linguistic, conceptual, social and cultural scaffolding as part of the CATs’ personal practical knowledge. Also, the findings demonstrated that CATs’ knowledge of cultural scaffolding is limited in comparison to other scaffolding strategies. The findings have an impact on the nature of ELL instruction and its effectiveness. 相似文献
13.
The effects of Key2Teach on teachers' sense of self-efficacy and emotional exhaustion related to students with externalizing problem behaviour were investigated using an RCT-design. 103 teachers were randomly assigned to an intervention or control condition and followed during a school-year. Data were collected at three time-points. Self-efficacy for instructional strategies improved at post-test and emotional exhaustion decreased at follow-up as a result of Key2Teach. Self-efficacy did not mediate the effect on emotional exhaustion. The effect of Key2Teach on self-efficacy concerning student engagement and classroom management was mediated by an increase in closeness. Implications for research and practice are discussed. 相似文献
14.
三大改造完成以后,毛泽东领导中国人民对社会主义经济建设道路进行了初步探索.十年探索取得了巨大成就,中国经济得以迅速发展,初步形成了独立的国民经济体系和工业体系,中国从此由一个落后的农业国变成了具有一定经济实力的先进的工业国.这一探索为我们在社会主义建设道路上继续前进奠定了坚实的物质基础. 相似文献
15.
存储器实验是计算机原理课程教学中的重要环节。在探讨了存储器实验的作用与步骤、介绍了Proteus VSM软件的功能和用法后,分析了存储器实验设备的功能与操作方式、所需功能部件,给出了用软件仿真方式进行存储器实验设计的具体过程,提供了使用软件方式进行硬件设计与实验教学的方法。 相似文献
16.
康熙的木兰秋狝是内为训练军队巩固边防,外为防御外敌入侵.为此采取了一系列措施,年班制、围班制、朝觐、秋狝.兴建避暑山庄、外八庙,都为一个目的:"合内外之心,成巩固之业",即为民族实现大团结,为国家统一富强.康熙、乾隆不辱历史使命,完成了光辉的事业,垂范后世. 相似文献
17.
The present study produced an empirically derived, developmental continuum of children's understanding of specific pains. Subjects of 5 age groups: preschool (ages 3-4), first grade (ages 6-7), third grade (ages 8-10), sixth grade (ages 11-12) and college freshmen (ages 18-23) were interviewed with open-ended questions. The subjects were questioned extensively about 3 specific types of pain: an injury (skinned knee), a medical intervention (injection), and an illness (headache). Subjects were asked to describe each pain, tell why the pain hurt, and state the value of the pain. Their answers were then categorized and the categories ordered developmentally by experts in pediatric pain who were unaware of the children's ages. Then children's specific answers were given developmental scores. Multivariate analyses revealed that older children had more complex and precise understandings of pain, and this pattern differed by type of pain and by aspect of pain being considered. The subjects were also asked to report the frequency of their own pains and their parents' pain; parental and self-reported pains were closely related. 相似文献
18.
The evidence that intergenerational contact influences children's attitudes about the elderly or aging, in either a positive or negative manner, is mixed. In an attempt to shed light on this issue, perceptions of the elderly were assessed for 33 3-to 5- year-old children enrolled in either an intergenerational daycare program or a daycare program without an intergenerational curriculum. The Children's Attitudes Toward the Elderly (CATE) and a measure of perceived ability to participate in activities (Activity Scale) were used to examine the influence of an intergenerational daycare program on preschool children's attitudes. Program-related differences in attitudes about aging or the elderly were expected, but, overall, the two groups were very similar. In general, children rated older adults less positively than they did younger adults, and they believed that older adults could participate in fewer activities than children could. Longitudinal studies of intergenerational programs, especially programs with an aging education curriculum, are needed to further illuminate the effects of intergenerational contact on children's attitudes. 相似文献
19.
西安市商业空间结构研究 总被引：1，自引：0，他引：1
运用商业地域集中系数和区住熵指数来说明西安市商业在地域上的分布状况和行业的专门化水平．数据分析表明,西安市商业在地域分布上表现出明显的圈层结构;商业内部行业专门化水平偏低;初步形成三大类商业地域结构类型．基于以上结论,进一步分析了西安市商业空间结构的影响因素,提出西安市商业地域空间结构存在的问题和优化方向及对策． 相似文献
20.
4-6-year-old children were given problems in which they had to decide which 1 of an array of points was in line with 2 coordinate markers. The simplest problems had 4 points to choose between and markers perpendicular to the horizontal and vertical axes. Children of all ages were able to extrapolate lines from both coordinates to solve these problems. The older children were also given more complex problems. In some of these, 1 marker was at 45 degrees to an axis, the other perpendicular: in others the array was increased to 16 points and presented sometimes in a regular, sometimes in an irregular pattern. There were developmental improvements in performance, and the complex problems were more difficult than the simpler ones. However, 5- and 6-year-olds did extremely well even on the complex problems. The results establish that young children's grasp of Euclidean spatial relationships is more adequate than has often been suggested. 相似文献