如何提高《机械制图》课程的教学效果

《机械制图》是一门专业性、实践性都很强的基础课,要提高这门课程的教学质量,必须改变教学思路,合理地选择教学内容,充分利用现代化的多媒体教学手段。     

在《机械制图》教学中如何激发学生的潜能

以成功教育理论和心理学理论为指导,将成功教育理论与《机械制图》教学有机结合起来,研究在《机械制图》中实施成功教育的教学模式。根据以往的教学经验,提出了成功教学的新思路。     

锚杆的断裂分析

通过对断裂的锚杆进行宏观断口、微观组织及力学性能分析,认为加工锚杆的模具孔过小是导致锚杆产生冷作硬化而脆断的主要原因。     

The effect of drawing on children's experiences of investigations following alleged child abuse

The primary aim of the study was to evaluate investigative interviews from the perspectives of the children, comparing children who drew with children who did not. One hundred twenty-five children, alleged victims of sexual abuse, were asked about their investigative experience. The uniqueness of the study is that all of the interviews were conducted according to the NICHD Protocol and that children were randomly assigned into one of the two research conditions (drawing vs. non-drawing). The results clearly demonstrate the advantage that drawing has on the children's experience of the investigation, with children in the drawing group more often reporting feelings of hope and success. This study provides practical guidelines for practitioners by emphasizing the beneficial effects that drawing can have. The study stresses the importance of integrating into forensic investigations interventions that enhance children's testimonies and ensure that the investigation is an empowering experience that generates feelings of trust, self-worth, and justice.     

高职院校机电类专业工学交替模式浅析

本文以无锡南洋职业技术学院机电一体化专业工学交替实践为例,对其在选择企业、校企共同制定培养方案、树立学生归属感、推行多元评价体系等方面的做法进行了探讨,由此得出了关于机电类专业工学交替模式的几点思考。     

几何定理的机器证明--每个中国数学教师都应懂得的方法

本文着重介绍了几何定理的机器证明的开拓者和奠基人——吴文俊院士创立的“吴法”及其主要成员张景中院士的“消标点法”和杨路教授的“降维算法”。     

影响钛合金机械加工因素的分析与研究

章分析了影响钛合金机械加工性能的主要因素，通过对各种机械加工的研究，提出了解决钛合金机械加工中的主要问题的方法。     

根据介质极化率求机械法拉第效应旋转角

通过对机械法拉第效应和磁法拉第效应关系的理论分析，总结出用介质极化率求机械法拉第效应旋转角的理论方法。     

Experimental study on behaviors of polypropylene fibrous concrete beams

Synthetic fibers made from nylon or polypropylene have gained application when loose and woven into geo textile form although no information on the matrix＇s mechanical performance is obtained so that more understanding of their structural contribution to resist cracking can be determined. This paper presents the results of an experimental investigation to determine the performance characteristics of concrete reinforced with a polypropylene structural fiber. In this investigation ＂Fiber mesh＂ brand of fibers manufactured by SL Concrete System, Tennessee, USA and marketed by M/S Millennium Building System, Inc., Bangalore, India are used. The lengths of the fibers used were 24 mm. Fiber dosages used were 0.9, 1.8, 2.7 kg/m^3. A total of three mixtures, one for each fiber dosage were made. A standard slump cone test was conducted on the fresh concrete mix with and without fibers to determine the workability of the mix. The test program included the evaluation of hardened concrete properties such as compressive, split tensile, modulus of rupture and flexural strengths. The increase in compressive strength is about 36.25%, 26.20%, and 23.75% respectively that of plain concrete. This increase in strength was directly proportional to amount of fibers present in the mix. The increase in flexural strength for Mixes I-III is about 21%, 16.6%, and 23% respectively that of plain concrete specimens. An experimental investigation was also made to study the behaviors of reinforced fibers concrete beams （with longitudinal reinforcements） under two-point loading. The deflection and crack patterns were also studied. The improvements in strength and ductility characteristics were discussed.     

Diagrammatic representation and event memory in preschoolers

This study investigated the use of diagrammatic representation as an aid for recalling a past event for 30 4–5‐year‐olds in their preschool year prior to commencing primary school. The children were randomly placed into one of two groups: ‘talkers’ (verbal memory) or ‘drawers’ (diagrammatic memory). They were interviewed individually, both one day and one month after the event that involved making a much‐needed tool for a game at their preschool. Both interviews were conducted by a familiar adult through three different levels of engagement—neutral, verbal and visual. Results showed that a combination of drawing and specific questioning (‘verbal’ level of engagement) facilitated better recall of detail than either drawing or talking independently. No significant differences regarding accuracy of responses were found between the two groups.