多级斜板式斜板的角度对水沙分离影响的实验研究

为了研究多级斜板式水沙分离装置中斜板安装角度的变动对装置的水沙分离效果所产生的影响,对同一流量、不同含沙浓度进行了水沙分离实验。结果表明:流量控制在0.9m3/h左右、含沙浓度在15kg/m3之内时,溢流泥沙颗粒D50随泥沙浓度增大而逐渐减小,装置的分离率就高;当斜板的角度α为45°、β为60°时,装置的水沙分离效果最佳,分离率最高。     

An investigation into the types of turning point events affecting relational change in student-faculty interactions

This study sought to determine whether students were able to identify significant turning point events contributing to relational changes with university instructors. Fifty-two senior university students were interviewed using the Retrospective Interview Technique. A total of 117 turning points were identified. Content analysis of the data revealed two mutually exclusive and exhaustive categories: Perception of Instructional Communication Competence and Character and Perception of Instructor's Management Style. These major categories were further divided into six subcategories. The paper concludes with discussion of the implications of these findings and recommendations for future research.Karen Lynn O'Neill is an M.A. graduate of the College of Communication, California State University at Chico (CSUC). Her thesis, upon which this article is based, was singled out for special distinction by the CSUC Communication Graduate Faculty. She currently teaches in the CSUC Department of Management. William R. Todd-Mancillas obtained his Ph.D. from the College of Communication, Florida State University. His present research interests concern factors affecting student evaluation of faculty and instruction.     

基于超声微振动的平板防冰风洞实验研究

为了开发基于超声微振动的风力机叶片防除冰技术,对铝制平板进行了风洞结冰试验研究。试验在利用自然低温的结冰风洞中进行,以铝板表面的结冰分布与结冰厚度为主要参数,测试了不同超声波频率产生的微振动对铝板结冰分布情况与结冰厚度的影响。结果表明:超声微振动可以降低结冰表面的粗糙度和结冰厚度;当振动频率为25.6kHz和33kHz时,抑制铝板结冰的效果较好,结冰厚度的抑制率分别为26.88%和23.7%,验证了超声波微振动可在一定程度上抑制铝板结冰生长,为超声微振动法在风力机叶片防除冰领域的应用提供了理论和实验基础。     

植物枝条倒插成活的探究

选取本地常见的月季、柳树、葡萄等正插容易成活的植物枝条进行倒插试验.对枝条倒插后的生长情况进行观察和分析,得出枝条倒插成活是与植物种类有关,能成活的是柳树.其次与插入土壤部分枝条上芽的数量有关.插入土壤部分的枝条上至少有3个芽,有可能成活.柳枝倒插成活率与插入土壤中的枝条上芽数量成正比.     

Theoretical investigation into the effect of rail vibration dampers on the dynamical behaviour of a high-speed railway track

Installation of rail vibration dampers (rail dampers for short) onto rails between sleepers is one of the measures to control rail noise generation and roughness growth. Amid the rapid expansion of high-speed and underground railway networks in China, many suppliers are actively marketing and promoting their products, often giving confusing information. In this paper, a parametric study is used to investigate the effect of rail dampers on the dynamical behavior of a Chinese high-speed railway track. The Fourier transform-based method developed for analyzing dynamics of a railway track as an infinitely long periodic structure, with or without rail dampers, is applied in the investigation. It is hoped that results in this paper can help develop the understanding of the working mechanism of rail dampers, and provide useful information for product design and application.     

统计学学科与专业建设的实践探索

在我国社会经济建设和高等教育事业快速发展的大背景下,浙江工商大学统计学专业抓住机遇,狠抓学科建设和专业建设,经过几年的拼搏,取得了省重点学科、省重点专业、硕士点、博士点等突出成绩,积累了丰富的经验,对普通高校开展学科建设和专业建设具有借鉴意义。     

基于分形维理论的铣削振动特性实验研究

铣削加工属复杂非线性过程,其振动特性直接影响加工工件的表面粗糙度.文章以分形维理论为实验理论依据,计算工件振动信号的关联维数和盒维数,研究铣削加工振动特性.实验结果表明,铣削振动是一种混沌运动,振动信号具有分形特征;选择合适嵌入维数计算得出的关联维数反映工件表面粗糙度真实特征,关联维数可以作为检测表面粗糙度的一个特征参量;盒维数分布在很小范围内,表明铣削参数调整对工件振动的高频特性影响不大.     

一种活塞环压力分布与自由形状计算方法

通过分析不同特性的非均压高点环非仅为余弦函数压力分布,应用有限元分析软件,基于静态缩减法求解活塞环接触节点位移的数值方法,参考Arnold 径向压力分布表达式,得到引入压力分布形状系数,且适用于最大相对压力1 < im ≤ 2.22,呈卡腰葫芦形压力分布形状的活塞环压力分布表达式和自由形状的计算方法。通过实例验证,该计算方法达到活塞环设计要求。     

高职教育系统整合初探

为了形成高职教育整体优势,要对高职教育系统进行整合,以形成优质的教育资源。高职教育通过专业群、校企群、学校群的构建,优质教育资源得以共享,整合的辐射效应、均衡效应和持久效应正在显现。     

高职学生英语词典使用策略调查研究

采用定量分析的方法,从词典使用观念、显性词典教学、词典使用概况、输入性学习和输出性学习时词典使用等四方面,对高职学生英语词典使用状况进行了调查研究。调查结果表明,高职学生在词典使用中存在着词典使用意识淡漠、过于依赖电子词典、使用频率低下等诸多问题。研究同时发现,成功的英语学习者和不成功的英语学习者在词典使用方面存在许多差异,并提出了有针对性的高职学生词典使用策略培训建议。     

An investigation into the receptivity of undergraduate students to assessment empowerment

Providing empowerment to students with regard to assessment procedures is a potential mechanism for increasing students’ satisfaction with their education programme and environment. The receptivity of students is likely to vary according to several factors, including their confidence in the ability of assessors to adequately judge the quality of their work, their understanding of assessment procedures and the degree of autonomy they feel is appropriate. Their perception of these factors can also be expected to vary according to how advanced they are in their degree programme. This paper presents the results of a pilot study into the receptivity of first‐ and third‐year undergraduate geography students to various mechanisms and concepts associated with assessment empowerment. Some receptivity to empowerment relating to choice of assessment was observed in first‐year students but the greatest receptivity was found in third‐years, at both individual and community empowerment levels. Third‐year students displayed an increased desire for assessment choice, criteria choice and community empowerment, and decreasing confidence in the lecturer as assessor. Based on these initial results, a methodology for incorporating assessment empowerment into undergraduate teaching is outlined.     

研究生学术规范教育的调查研究

通过对当前研究生的学术规范教育现状的调查研究,了解到:研究生群体中存在学术不规范的行为,研究生非常缺乏学术规范的知识,研究生的学术规范教育还远远不够。针对这样的情况,高校还需做出更多努力来加强研究生的学术规范教育,从而提高研究生的质量,促进我国学术事业的发展。     

中国文化内向型气质及其变化趋势探讨

本文论述了中国内向型文化的特点 ,认为现代中国文化处于“急变阶段”,并从内向型设计、内向型开拓和内向型超越等三个方面探讨其发展变化的趋势     

An investigation into the role of the controller in institutions of higher education

The purpose of this study was to investigate the controller's perception of his role in institutions of higher education and whether that perception differs from that of top academic administrators. A modified Delphi technique was used to gather and refine data. Despite some minor disagreements, it was shown that there is general agreement as to the proper role of the controller in institutions of higher education.     

An investigation into the emotional reactions to inclusion of Ghanaian mainstream teachers

Literature is replete with evidence of considerable pressure that many mainstream teachers may experience in their bid to respond to the diverse needs of children with special educational needs and disabilities and to achieve ever better results. In this study, the results of 100 teachers from mainstream primary schools in three of the ten regions of Ghana were examined. The analysis involved five bi‐polar emotional reactions; namely: anxious/relaxed; encouraged/discouraged; confident/diffident; satisfied/dissatisfied; self‐assured/ worried. The results confirmed that in teaching children with SEN in the mainstream, teachers experienced psychological stress. On the basis of the findings, suggestions for more information about SEN, supply of resources and inter‐agency collaboration were made.     

An investigation into the role of gesture in enhancing children's vocabulary command

The primary aim of the current study was to explore whether non-linguistic conventions, especially gesture, have a significant impact on children's vocabulary learning. Fifty male and female Iranian children aged between 3 and 6 years of age (mean age?=?3.5) from two classes of a language institute were taught a set of lexical items using two different teaching procedures: one employing linguistic conventions only, without gesture, and the other through a combination of linguistic and non-linguistic approaches. The data analysis revealed that non-linguistic conventions, including gesture, significantly influence children's learning of vocabulary items. The study contributes to the literature examining vocabulary and gesture and may inform early years practitioners' approaches to vocabulary teaching.     

英语写作中进行体使用的对比研究

基于英语学习者笔头作文语料库(WECCL)和英语母语者语料库LOCNESS (The LouvianCorpus of Native English Essays),对中国大学生英语进行体的使用情况进行调查研究,以期为外语教学带来相关启示.研究发现中国大学生英语议论文写作中进行体的使用频数略有不足；进行体动词使用种类单一,常局限于小部分词汇上,有滥用现象,英语本族语中很少用于进行体的动词却频繁出现在中国大学生英语写作中；同时,中国大学生写作中进行体使用常出现不地道、甚至不正确表达现象.     

An investigation of tertiary students' understanding of evaporation,condensation and vapour pressure

Based on a purposive sample of 15 second‐year chemical engineering students, this study investigates students' conceptions of evaporation, condensation and vapour pressure. During individual interviews the students were questioned on three tasks that had been designed around these topics. Qualitative analysis of student responses showed a range of conceptions in each area, including some misconceptions. A key underlying misconception was the belief that evaporation and condensation require a temperature gradient in order to take place. Many students changed their initial (incorrect) answers when presented with further physical evidence as the interview progressed. The study points to the importance not only of practical work, but of associated conceptual discussions that allow students to reflect on and refine their conceptions.     

An investigation into children's developing awareness of time and chronology in story

This study explores how children in English primary schools perceive time and chronology in storybooks-whether the children are aware of the devices used in stories to manipulate time and chronological sequence, and whether their responses demonstrate their own ability to use these devices. Children aged between 3-9 years were involved in conversation about storybooks through the use of open-ended questions. Responses were analysed according to features of the talk that reflected the children's awareness of the time dimension within the stories. The data suggest that children are able to use temporal terms and perceive chronological sequence, or lack of it, at very early ages. If exposed to ideas about time within a meaningful context, young children are capable of surprisingly sophisticated ideas. The implications of this finding for teaching chronology and for the history curriculum are discussed.