提高切削加工表面质量方法的探讨     

许文祥 《十堰职业技术学院学报》2004,17(2):84-86

机械零件加工表面质量的好坏,对零件的使用性能有很大的影响。本文主要探讨已加工表面的形成过程,已加工表面质量的影响因素以及提高切削加工表面质量的一些方法。  相似文献   

Assessing and Controlling Acquiescent Responding When Acquiescence and Content Are Related: A Comprehensive Factor-Analytic Approach     

Pere Joan Ferrando  Fàbia Morales-Vives  Urbano Lorenzo-Seva 《Structural equation modeling》2016,23(5):713-725

This article proposes procedures for assessing and controlling acquiescence in personality scales when acquiescence is related to the content that the scale intends to measure. Our proposal is comprehensive in that it can be applied to different item response formats fitted with response models that can be parameterized as factor-analytic models. In the calibration stage, our proposal makes joint use of a balanced scale and a set of markers for acquiescence, and consists of 2 sequential procedures: a direct semirestricted solution, and a restricted solution with minimal identification constraints. In the scoring stage, we discuss how the information given by the acquiescence–content relation can be used to obtain Bayes expected a posteriori scores. The robustness of the direct procedure is assessed both analytically and by simulation. A free, user-friendly program that implements the procedures proposed is made available. Practical issues of use and interpretation are discussed and illustrated with an empirical application.  相似文献   

汉英基数词的比较研究     

路伟  杨文伟 《蒙自师范高等专科学校学报》2007,5(6):115-117

基数词是英汉两种语言中出现频率较高的一类词,英汉两种语言中的基数词各有自己的一些特点。英汉两种语言基数词的系数、位数、级数组合既有相同点,又有相异点。汉语是"五位进级制",英语是"四位进级制"。  相似文献   

How pre-service teachers navigate trade-offs of food systems across time scales: a lens for exploring understandings of sustainability     

Lina Yamashita  Kathryn Hayes  Cary J. Trexler 《Environmental Education Research》2017,23(3):365-397

In response to the increasing recognition of the need for sustainable food systems, research on students’ and educators’ knowledge of food systems and sustainability more broadly has grown but has generally focused on what people ‘fail’ to understand. Moving away from this deficit approach, the present study used semi-structured interviews to explore how 12 pre-service teachers (PSTs) in the US consider sustainability in terms of the trade-offs – or concurrent costs and benefits – associated with using different agricultural resources over short, medium, and long terms. Drawing upon the constructs of framing, metacognition, and complex causality, the study found that the majority of PSTs referred to indirect experiences of seeing or hearing about agricultural resources to demonstrate stable knowledge of short-term trade-offs and construct tentative knowledge about medium-term trade-offs. Few described long-term trade-offs. Most participants also acknowledged some gaps in their knowledge in discussing trade-offs across the different time scales. Findings suggest the importance of leveraging and building upon educators’ (and ultimately students’) prior experiences to build their understanding of complex trade-offs that underlie food systems. The study also illustrates the value of using the concept of trade-offs across time scales to explore people’s conceptions and understandings of sustainability.  相似文献   

大学生英语自主学习能力调查及量表的建立——基于“工程化”的人才培养目标     

冯文敬 《鸡西大学学报》2014,(2):98-99,111

大学英语人才培养目标的核心内容之一就是培养大学生的自主学习能力。但目前对于大学生的英语自主学习能力还没有统一衡量的标准。工程化教育背景下,为培养大学生英语自主学习和应用能力,应建立一个统一、标准、合理、科学的大学生英语自主学习能力量表。其建立过程,应充分借鉴国外先进的量表,并结合《大学英语课程要求》的标准,同时考虑到不同大学生的专业需求。  相似文献   

Early intervention in behaviour     

Stephen Sharp  Engelina Davids 《Emotional and Behavioural Difficulties》2013,18(3):173-188

Abstract

FAST-Track is a support programme for pupils with social and emotional behaviour difficulties. It is designed to integrate the school curriculum, social skills training, reading development, parenting skills and home-school liaison. A 3 year longitudinal study is reported in which schools implementing the full FAST-Track programme were compared with those implementing only the curriculum component. Changes in behaviour were monitored using an amended version of the Rutter Behaviour Rating Scale. Results did not show any clear difference between the two groups of schools but did show substantial differences between individual schools, highlighting the difficulty of demonstrating the effectiveness of intervention programmes given the multiplicity of other factors which determine behaviour change. The implications of these findings for the methodology and practice of intervention programmes in this area are explored.  相似文献   

Planning,re-bordering and setting times: a comparative analysis of European and Latin American ‘education spaces’     

Xavier Rambla 《Globalisation, Societies & Education》2013,11(4):520-537

The article compares educational regionalisation in Europe and Latin America. This analysis unveils the influence of three social phenomena in the two case studies, namely power, fields of activity and knowledge. Mostly, it focuses on the initiatives led by the European Union and the Organisation of Ibero-American States in order to implement large strategic, multi-government educational plans in each continent. The actions of international political players, the theories (or ‘ontologies’) embedded in these devices and the consequences for sub-national politics are observed.  相似文献   

Explaining Method Effects Associated With Negatively Worded Items in Trait and State Global and Domain-Specific Self-Esteem Scales     

José M. Tomás  Amparo Oliver  Laura Galiana  Patricia Sancho  Marisol Lila 《Structural equation modeling》2013,20(2):299-313

Several investigators have interpreted method effects associated with negatively worded items in a substantive way. This research extends those studies in different ways: (a) it establishes the presence of methods effects in further populations and particular scales, and (b) it examines the possible relations between a method factor associated with negatively worded items and several covariates. Two samples were assessed: 592 high school students from Valencia (Spain), and 285 batterers from the same city. The self-esteem scales used were Rosenberg's Self-Esteem Scale, the State Self-Esteem Scale, and Self-Esteem 17. Anxiety was also assessed with the State-Trait Anxiety Inventory, and gender and educational level were taken into account. The models were conducted using a multiple indicators and multiple causes (MIMIC) model framework. The evidence in this research pointed out that method effects were present across the different measures of self-esteem. Moreover, a significant and negative effect of anxiety on method effects was present across scales and samples, whereas no effects of age or educational level where found.  相似文献   

温度场中斜梁受简谐激励的1/2次亚谐-主参数共振     

杨志安  王丽 《闽江学院学报》2008,29(2):40-43

以温度场中斜梁受简谐激励的非线性振动方程为基础,应用非线性振动的多尺度法,求得非线性振动系统1/2亚谐-主参数共振的一次近似解,并进行定常解稳定性分析和数值计算.分析了温度、激励、几何尺寸对1/2亚谐-主参数共振幅频响应曲线的影响.  相似文献   

地理空间的认识与表达     

谢泽氡  马遵平 《绵阳师范学院学报》2007,26(2):95-100

对空间认识和表达涉及多个学科并受制于多种因素,而多元化的空间理论和形式是科学发展之必然和需要。地理学建立和发展了多元化的地理空间表达形式,包括经纬线与地图投影、时空尺度、距离与区位、虚拟地理环境。对多种地理空间形式的认识和表达是地理学学科特征的重要体现,并促使地理学向更广、更深的方向发展。  相似文献