电表改装与校准     

杨秀芳 《河北能源职业技术学院学报》2010,10(1):67-68,71

电表在测量中有广泛的应用,因此如何了解电表和使用电表就显得十分重要。电流计是用来测量微小电流的,允许通过的电流很小,本文用它来扩大量程。  相似文献   

关于现代汉语句法结构系统的理论思考     

周国光 《华南师范大学学报(社会科学版)》2006,2(2):72-78,86

由现代汉语句法结构系统中的“N的P”结构的定性问题切入,评论了汉语语法学界对 “N的P”结构的看法;根据交际功能是语言最重的功能的思想,提出了用表达功能统一句法结构系统的构想。  相似文献   

CSE and the 16+: Teachers' Views     

Elaine S. Freedman 《School Leadership & Management》2013,33(1):79-83

During the interview ‘Mary’ – who had last year been a school pupil and this year is a first‐year undergraduate on the new degree in Education (with Teaching Certificate) – talked at some length, and with considerable feeling, about how her main frustration as a female pupil had been what she saw as her systematic disenfranchisement from influence over the content and process of the schools' curricula which she had pursued over the previous thirteen years. Although she felt that all pupils suffered this lack of influence she was convinced that girls suffered disproportionately. [Some time later in the interview], when talking about the ‘teaching practice’ she had recently completed, ‘Mary’ described how her ‘music and movement’ work had met with ‘loud and disruptive’ reaction from some of the boys in the mixed class of 7–8 year‐olds, even though the majority of the children had clearly enjoyed and been engaged by the scheme she had designed. Faced with this rejection, and experiencing some anxiety about how the teachers and her tutor would assess her potential as a future teacher if she was not seen to be exercising what they would count as ‘good control’ of the class, ‘Mary’ resolved her ‘problem’ by designing an alternative scheme which the few boys would not (and did not) reject. Although the girls had ‘subsequently shown less interest’, their quiet acquiescence to what she offered them reduced her anxiety about her assessment as a teacher. When she related her pupil experience to her teaching practice experience ‘Mary’ was dismayed to realise that she had ‘reproduced for others precisely that frustration which [she herself] had experienced as a pupil’.

Extract from author's notes when evaluating a new pre‐service degree course, June 1983.  相似文献   

山西省推手教练员现状调查研究与分析     

高伟 《晋东南师范专科学校学报》2013,(2):49-51

采用问卷方法,对山西省推手教练员进行调查,力求全面了解和把握山西省推手教练员基本情况,并对其进行详实的研究分析,为提高山西省推手教练员素质和推手项目的长效发展提出相应的建议。  相似文献   

Validation of a videogrammetry technique for analysing American football helmet kinematics     

Ann Bailey  James Funk  David Lessley  Chris Sherwood  Jeff Crandall  William Neale 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(5):678-700

ABSTRACT

Professional American football games are recorded in digital video with multiple cameras, often at high resolution and high frame rates. The purpose of this study was to evaluate the accuracy of a videogrammetry technique to calculate translational and rotational helmet velocity before, during and after a helmet impact. In total, 10 football impacts were staged in a National Football League (NFL) stadium by propelling helmeted 50th percentile male crash test dummies into each other or the ground at speeds and orientations representative of concussive impacts for NFL players. The tests were recorded by experienced sports film crews to obtain video coverage and quality typically available for NFL games. A videogrammetry procedure was used to track the position and rotation of the helmet throughout the relevant time interval of the head impact. Compared with rigidly mounted retroreflective marker three dimensional (3-D) motion tracking that was concurrently collected in the experiments, videogrammetry accurately calculated changes in translational and rotational velocity of the helmet using high frame rate (two cameras at 240 Hz) video (7% and 15% error, respectively). Low frame rate (2 cameras at 60 Hz) video was adequate for calculating pre-impact translational velocity but not for calculating the translational or rotational velocity change of the helmet during impact.  相似文献   

如何在中学物理教学中实施“分层教学、分类指导”的教学     

周华 《铜仁学院学报》2005,7(8):70-71,74

物理教学中，“分层教学、分类指导”的教学模式能使学习成绩、能力层次不同的学生都能积极参与课堂教学活动，并在课堂教学活动中都有不同程度的学习收获，达到圆满完成教学任务，全面提高全体学生的素质的目的。  相似文献   

WPS使用故障分析及排除技巧     

温文 《嘉应学院学报》1997,15(3):46-49

本文是从WPS系统使用内存、功能使用内存及WPS格式文件的文件头的结构的分析出发,给出用户在使用WPS编辑文件的过程中碰到几类故障及排除技巧.  相似文献   

双侧标准大骨瓣减压治疗特重型颅脑损伤     

方志敏  宋建华  陈建宁  黄迢华 《莆田学院学报》2005,12(5):32-34

总结2002年5月至2005年5月间采取双侧标准大骨瓣减压救治的38例特重型颅脑损伤的临床效果。探讨双侧去大骨瓣减压术治疗特重型颅脑损伤的手术方法与临床意义等问题。指出早期标准外伤大骨瓣开颅减压能明显改善特重型颅脑损伤病人的预后。  相似文献   

关于补习教育的再思考   总被引：4，自引：0，他引：4  

王吉 《河北师范大学学报(教育科学版)》2008,10(8)

日益膨胀的补习班可能阻碍课改的深入实施,但补习教育的红火更多是人们对课程改革不理解的结果,因此很难通过排除它促进课程改革。作为一种普遍的社会现象,补习教育有其逻辑上的合理性,家长、补习教师双方围绕不乏优点的补习教育构成了一个稳定的供需系统,客观分析这个系统才可能更有效地解决补习教育的负面问题。  相似文献   

云南省普通高等院校高水平运动队教练员队伍基本状况及对策分析     

方成军  刘南平 《蒙自师范高等专科学校学报》2008,6(5):96-98

本文运用文献资料法、专家访谈法、问卷调查法、数理统计法、比较分析法对云南省教练员队伍进行调查,通过分析目前高校教练员队伍的现状,找出教练员队伍中存在的问题,并提出有利于教练员队伍持续发展的建议.  相似文献