共查询到20条相似文献，搜索用时 156 毫秒
1.
彩电维修虚拟实验系统是未来彩电维修实验教学的一个发展方向。对彩电维修虚拟实验平台进行了初步的研究,介绍了彩电虚拟实验平台的基本体系结构、开发工具、关键技术、解决方案以及进一步研究的思路。 相似文献
2.
3.
通过一边学习开关电源工作原理和一边训练维修技术的双边教学方法．改变传统的先学习了彩电开关电源工作原理后再学习维修技术的单边教学方法．使学生对彩电开关电源维修的动手能力得到显著提高,对彩电开关电源工作原理也得到较深刻的理解． 相似文献
4.
读懂彩电电路图是使学生掌握彩电维修技能的关键，教师应从熟悉彩电方框图、掌握彩电各单元电路、解读彩电整机线路原理图、识读彩电整机线路板图（PCB）四个方面培养学生识读彩电电路图的能力。 相似文献
5.
6.
张新芝 《山东商业职业技术学院学报》2002,2(3):41-43
彩色电视机中使用了I^2C总线技术后，电路结构发生了很大变化。在常规彩电中已经成为定式的某些典型故障的检修思路，可能在I^2C总线控制彩电中已不再完全适用。这就要求彩电维修人员要以新的维修理念和维修思路去适应I^2C总线这一新技术，最重要的是要正确认识软件故障，掌握软件调整技术。 相似文献
7.
彩电泵电源电路与回扫线故障的检修张首军，朱坤显屏幕出现回扫线是彩电维修中常见的故障，尤其上部出现回扫线几乎和彩电场输出电路的泵电源工作状态分不开。通过分析回扫线客观存在的机理以及泵电源电路的工作过程，并对实际维修中遇到的泵电源工作失常而引发回扫线故障... 相似文献
8.
通过雷电从天线或电源的途径进入彩电造成的损坏,分析其原因,总结出检修的思路和方法,结合实例,对因雷击损坏彩电的维修有一定指导作用。 相似文献
9.
张源峰 《闽西职业大学学报》2004,6(2):116-117,120
I^2C遥控彩电的广泛投入市场，了解其检修技巧非常必要。I^2C遥控彩电主要有硬件故障和软件故障，讨论了I^2C遥控彩电软件故障的特点及原因，常见的故障现象，软件故障的检修技术及其注意事项，可供一般维修人员和用户参与。 相似文献
10.
张源峰 《闽西职业技术学院学报》2004,6(2):116-117
Ⅰ2C遥控彩电的广泛投入市场,了解其检修技巧非常必要.I2C遥控彩电主要有硬件故障和软件故障,讨论了I2C遥控彩电软件故障的特点及原因,常见的故障现象,软件故障的检修技术及其注意事项,可供一般维修人员和用户参与. 相似文献
11.
中国学生英语学习过程中“石化现象”之探讨 总被引：2，自引：0，他引：2
本文从掌握英语语言系统和英语实际使用之间的矛盾,语言的输入与输出之间的不平衡,学习语言的动机和态度,语言学习的负向迁移等方面分析中国各层次学生在国內英语学习过程中语言“石化现象”的內外起因,并探讨了如何从英语基础教学抓起,通过增加正迁移,减少负迁移,强化课堂教学的促进功能及语言学习认知方法的改进等来防止或缓解中国学生英语学习过程中语言“石化现象”,以提高英语学习实际效果和语言表达能力 相似文献
12.
ABSTRACT This essay explores the place of debating, talk and group work in the Secondary English classroom. It discusses the ways in which pupils in one student teacher’s year 7 class thrive in the dialogic classroom against the backdrop of curricular and attitudinal change. It considers the importance of talk and debate amongst the ‘communities of practice’ in schools and universities in empowering teachers to challenge and navigate policies, theories and practices. In exploring the role of play, student experiences and different forms of talk, this essay highlights their vital importance in relation to teaching and learning in English and in the formation of English teachers. 相似文献
13.
Objective: To estimate the oxidative stress and oxidative damage induced by abnormal free radical reactions in IgA nephropathy (IgAN) patients' bodies. Methods: Seventy-two IgA N patients (IgANP) and 72 healthy adult volunteers (HAV) were enrolled in a random control study design, in which the levels of nitric oxide (NO) in plasma, lipoperoxide (LPO) in plasma and in erythrocytes, and vitamin C (VC), vitamin E (VE) and β-carotene (β-CAR) in plasma as well as the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) in erythrocytes were determined with spectrophotometric mothods. Results: Compared with the HAV group, the averages of NO in plasma, and LPO in plasma and in erythrocytes in the IgANP group were significantly increased (P＜0.0001), while those ofVC, VE and β-CAR in plasma as well as those of SOD, CAT and GPX in erythrocytes in the IgANP group were significantly decreased (P＜0.0001). Linear correlation analysis showed that with the increase of the values of NO, and LPO in plasma and in erythrocytes, and with the decrease of those ofVC, VE, β-CAR,SOD, CAT and GPX in the IgAN patients, the degree of histological damage of tubulointerstitial regions was increased gradually (P＜0.0001); and that with the prolongation of the duration of disease the values of NO, and LPO in plasma and erythrocytes were increased gradually, while those of VC, VE, β-CAR, SOD, CAT and GPX were decreased gradually (P＜0.005). The discriminatory correct rates of the above biochemical parameters reflecting oxidative damage of the IgAN patients were 73.8%-92.5%, and the correct rates for the HAV were 70.0%-91.3% when independent discriminant analysis was used; and the correct rate for the IgAN patients was increased to 98.8%, the correct rate for the HAV was increased to 100% when stepwise discriminant analysis was used. The above biochemical parameters' reliability coefficient (alpha) were used to estimate the oxidative damage of the IgAN patients as 0.8145, the standardized item alpha=0.9730, F=53273.5681, P＜0.0001. Conclusions: A series of free radical chain reactions caused serious pathological aggravation in the IgANP' bodies, thus resulting in oxidative damage in their bodies. In treating IgANP, therefore, it is necessary that suitable dose antioxidants should be supplemented to them so as to alleviate the oxidative damage in their bodies. 相似文献
14.
朱炎军宋彩萍 《宁波大学学报(教育科学版)》2018,(5):75-084
通过建构包括3个一级指标和22个二级指标的高等教育科技创新能力的评价指标体系,采用因子分析法对国内省域高等教育科技创新能力的进行时空差异分析。研究发现:高校科技创新能力在省域上呈现东高西低、南高北低、中间高两边低的特点;省域高等教育科技创新能力差距呈现缩小的趋势;中南部省市高等教育科技创新能力相对上升,中北部和东北地区的高校科技创新能力相对下降;高等教育强省的科技创新能力较强且较为稳定;经济强省的高等教育科技创新能力较强且较为稳定。影响区域高等教育科技创新的因素包括经济、历史、政策、地理、制度五个方面的因素。 相似文献
15.
The United Nation's Decade of Education for Sustainable Development (DESD) is past its halfway milestone; yet, its overall impact on educational thinking and practice remains unclear in most places and regions of the world. While several efforts and programs are currently in place to promote and affirm the role of education in the global quest for sustainable development, most of these efforts remain largely unknown and invisible in most communities around the world. The Decade and ESD, arguably, are neither seen nor heard of in most of Africa. Most institutions, including schools, governments, businesses, civil society and individuals are yet to know and understand the role of education in the quest for sustainable development. The paper argues that in spite of the Decade and all the attention it is getting in some circles, the subject is muted in most educational policies and practices in Africa. In calling for more focused commitment to the roles of education in sustainable development in Africa, the paper also calls for a reconsideration of what sustainable development means, or might mean for Africans in their different places and cultures and to use that as a starting point for the exploration of more meaningful educational philosophies and pedagogies that responds to Africa's unique challenges. 相似文献
16.
植物组织细胞壁结构和成分的特化是细胞长期进化过程中与功能相适应的结果。表皮细胞细胞壁的角质化及角质层、周皮木栓层细胞的栓质化,使表皮、周皮具有防止水分过度蒸发、阻止病虫害侵入的保护功能。厚角组织和厚壁组织细胞壁不同程度、不同成分的加厚,是机械组织在植物体不同发育阶段与功能的适应。穿孔、筛板等细胞壁结构的特化以及细胞壁的木质化充分体现了输导组织的功能特点。 相似文献
17.
《Discourse: Studies in the Cultural Politics of Education》2012,33(3):361-375
This paper argues for the importance of ethnography in the conduct of educational research and the ways in which it can threaten, in a good sense, the certainties and dominance of performativity. The paper uses the poetry of Emily Dickinson to signal the importance of indirection in the conduct of ethnographic work and, more specifically, the ways in which she ‘chooses not to choose’ in her work. Her work is used to illustrate the complexities of meaning in what we see and hear in the conduct of research, the impossibility of mapping (in any ultimate sense) experience and identity and the indeterminacy we need to ‘hold’ in the stories we tell. The intention of the paper is to underline our necessary obsession with language in the processes of educational inquiry. The paper deliberately tries to echo its ‘message’ in refusing to ‘spell things out’ too closely for the reader. 相似文献
18.
明治期间日本汉语教科书中的北京话口语词 总被引：1，自引：0，他引：1
张美兰 《南京师范大学文学院学报》2007,(2):146-167
明治时期日本的汉语教学已经转为北京官话口语的新阶段，并产生了系列新教材，这些教材揭示了清末民初北京口语的面貌，是研究北京方言词汇史的重要资料。教材文献中的口语词表现灵活：同音异写，多音变，多衬字，具有浓厚的北京地方色彩，可以看作是北京话的特征词。它们为系统研究北京口语词提供了早期的书面例证，对编撰北京口语（北京方言）类词典极具价值。这些口语词产生时代不一，大多是清代中后期出现的，并在今天的北京话中留存．部分已经进入普通话中。 相似文献
19.
骆新泉 《南阳师范学院学报》2009,8(5)
悼亡词所抒写的是人世间最为沉痛和真挚的一段至情,即便是在悼念亡妾和亡妓词中,我们也同样充分地感受到了词人与妾、妓之间至亲至爱的深情,但是在这类词中,男性词人笔墨更多地涉及容貌服饰、体态肌肤、歌舞诗赋乃至云雨情事. 相似文献
20.
Feminist pedagogy and social change: the impact of the caribbean institute in gender and development
This paper examines the utility of a feminist pedagogical framework in establishing and organising the Caribbean Institute in Gender and Development (CIGAD), which is a biennial intensive gender and development training programme that has taken place in Barbados since 1993. To highlight the major impact that CIGAD has had in educating and empowering Caribbean men and women, the authors will first discuss the importance of feminist pedagogies in teaching, learning and activism in this programme by locating them within an intersectional postcolonial/transnational framework. Secondly, the authors consider the ways in which feminist pedagogy and praxis have been central in training women and men in the Caribbean region in gender analysis, helping them recognise the important role gender plays in development planning and policy as well as how it can be integrated into their work to improve their communities. Finally, through a feminist dialogic, participatory and experiential approach, the authors assess the impact that the CIGAD has had on participants, and community development training will be discussed based on the monitoring and evaluation of the exercise completed in 2014. 相似文献