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1.
本文对模拟电子技术课程中有关“反馈”的判别方法，诸如正、负反馈，电压、电流反馈以及串联、并联反馈等做了详细的分析比较． 相似文献
2.
张百川 《衡阳师范学院学报》1993,(3)
作者在教授“交流反馈的判别”时,采用启发式教学,分三步:①启发学生弄清各种反馈的实质;②启发学生按照反馈的实质去推敲判别的方法;③总结出既简单明了又便于掌握的结论。使学生很容易地掌握了正反馈和负反馈、电压反馈和电流反馈、串联反馈和并联反馈的实质以及判别方法。 相似文献
3.
第二章 放大电路中的反馈 一、反馈的类型与作用 1.按反馈极性分为正、负反馈,用瞬时极性法判断。按交直流性质分为交流反馈和直流反馈。 2.按反馈网络与输出回路的连接方式分为电压反馈和电流反馈,按反馈网络与输入回路的连接方式分为串联反馈和并联反馈。要求掌握四种连接方式的概念,判别方法及作用。 相似文献
4.
在电子电路的教学中,学生对反馈电路的学习比较困难,特别是判定反馈电路的反馈形式,是一个十分突出的难点。本文结合教学实际,提出了如何准确判定反馈电路反馈形式的方法,该方法使用方便,简单而准确。一、什么是反馈电路的反馈形式本文所说的反馈电路的反馈形式,是指反馈电路中反馈信号的输入方式与反馈信号的取样方式之组合形式。反馈信号与输入信号的联接关系有串联与并联之分,反馈信号从负载上的取样方式有电压与电流之分,组合起来有四种反馈形式,即:串联电流反馈,串联电压反馈,并联电流反馈,并联电压反馈。反馈电路反馈形式的判定,就是… 相似文献
5.
反馈技术在电子技术领域里有着广泛的应用,但是反馈电路类型的判别在教学中是一个重点,更是一个难点,本文作者主要针对反馈放大电路类型的判别作了一些分析,并在教学实践中总结得到了一种更直接的判别方法——同极法。 相似文献
6.
彭霞 《泰州职业技术学院学报》2001,1(1):54-56,59
判断反馈类型是电子线路学习中的一个难点，本文对此提出一些简洁的方法：反馈元件的一端与纯输入端相连为并联反馈，若与非纯输入端相连产串联反馈，反馈元件的另一端与纯输出端相连为电压反馈，若与纯输出端相连为电流反馈。 相似文献
7.
放大器是目前在电子设备中应用最广泛、最基本的组成部件。在《模拟电子技术》课程中,各种放大电路的性能分析也贯穿始终。因此,掌握并灵活地运用各种方法去分析放大器就显得尤为重要。反馈电路是实际放大器中不可缺少的组成部分,通过对反馈电路性质和类型的判别,就可以达到根据不同反馈类型对放大器性能的不同影响来定量分析放大器性能指标的目的。反馈电路类型的判别包括正反馈与负反馈的判别、电流反馈与电压反馈的判别、串联反馈与并联反馈的判别。通常采用的方法是：用“瞬时极性法”判别正反馈与负反馈。用“定义法”或“输出端短… 相似文献
8.
杨飒 《广东教育学院学报》2003,23(2):35-37
利用反馈元件与电路输入、输出端的连接方式,来简化反馈类型的判别过程,并根据电压和电流的相互转换关系,采用“瞬时电流法”判别反馈电路的性质．通过对四种反馈电路的分析,来证明该方法的可行性和优越性． 相似文献
9.
反馈是电子线路中的重要内容。反馈的类型判断包括交、直流的判断，正、负反馈的判断，电压、电流的判断，串联、并联的判断。迅速准确判断反馈的类型，有利于我们正确分析电路的功能，有利于我们在电路设计中利用反馈来改善电路的性能。 相似文献
10.
以二端口网络分析方法为基础,推导二端口网络互联的数学模型,并将其与反馈电路的数学模型比较,阐明二端口网络的并联、串联、串并联及并串联与反馈电路四种基本组态在结构、功能、数学描述以及信号传递方面的完全一致性。运用二端口网络的概念和方法,对晶体管反馈放大电路的分析结果证实：文章提出的观点、证明的过程和得出的结论是正确的。 相似文献
11.
培养语言交际能力是外语教学的目标所在,也合乎时代发展的要求。而交际能力的形成则需要在语言实践中即“信息的有效感知和反馈”过程中得以实现。本文探讨了“信息的有效感知和反馈”概念的理论基础。对外语教学中交际能力培养的影响,以及这种影响在笔者教学实践中对学生交际能力的形成所起的积极作用。 相似文献
12.
Phillip Dawson Michael Henderson Paige Mahoney Michael Phillips Tracii Ryan David Boud 《Assessment & Evaluation in Higher Education》2019,44(1):25-36
Since the early 2010s the literature has shifted to view feedback as a process that students do where they make sense of information about work they have done, and use it to improve the quality of their subsequent work. In this view, effective feedback needs to demonstrate effects. However, it is unclear if educators and students share this understanding of feedback. This paper reports a qualitative investigation of what educators and students think the purpose of feedback is, and what they think makes feedback effective. We administered a survey on feedback that was completed by 406 staff and 4514 students from two Australian universities. Inductive thematic analysis was conducted on data from a sample of 323 staff with assessment responsibilities and 400 students. Staff and students largely thought the purpose of feedback was improvement. With respect to what makes feedback effective, staff mostly discussed feedback design matters like timing, modalities and connected tasks. In contrast, students mostly wrote that high-quality feedback comments make feedback effective – especially comments that are usable, detailed, considerate of affect and personalised to the student’s own work. This study may assist researchers, educators and academic developers in refocusing their efforts in improving feedback. 相似文献
13.
英语写作教学评改分析 总被引：8，自引：0，他引：8
英语写作评改方法得当,有助于提高学生写作能力。传统写作教学的评改方法对提高学生写作能力的作用很不明显。本文对过程教学法的“反馈评改”进行分析,认为“反馈评改”是提高学生写作兴趣和写作能力的一种有效手段。 相似文献
14.
Lotta Jons 《欧洲师范教育杂志》2019,42(1):116-130
This study explored feedback conveyed in nine triadic conferences in teacher education practicum. The supportive character of formative feedback was explored in detail by employing a framework that combines two conceptualisations of feedback.The study depicted feedback directed backwards, upwards or forward and focusing performance, strategies, self-regulation or personal characteristics inside a framework of self-regulated learning. Findings show the teacher student to be more active in feed up, feed back and feed forward than previous studies have shown. Furthermore the conversations were found to be characterised by joint problem-solving in which all three parties focused on the student’s professional teacher-becoming. In conclusion, the findings indicate a feedback practice characterised by ‘sustainable’ feedback that scaffolds students’ self-assessing competence while fostering student self-reflexivity and self-regulation. 相似文献
15.
要在确保满足时间、质量、成本和效益的情况下交付给客户满意软件产品．必须保证团队与客户、团队成员之间能良好的沟通与有效的反馈。 相似文献
16.
谭翔宇 《南昌教育学院学报》2012,(4):164-166
在远程语言教学中,由于交流机会有限,书面反馈就成为了开启和维持指导教师与学习者对话的重要手段。基于网络平台开放英语写作课程,以书面反馈为研究对象,采用问卷和访谈等方式,探索在远程语言教学环境下,指导教师和学习者对反馈的理念与实践。研究发现不同指导教师所提供的反馈类型和形式有明显差异,而不同学习者之间的期望和理解也差异较大。建议指导教师提供反馈前应了解学习者的学习需求与特点,同时,需要对指导教师和学习者进行有关有效利用书面反馈系统的培训,以提高书面反馈的对语言教学的促进效果。 相似文献
17.
Since the introduction of the National Student Survey (NSS) in 2005, like many other institutions, the university where this study took place has expended substantial effort in improving the quality of feedback to students. However, despite much research, changes in pedagogical approaches and shifts in conceptual understanding related to feedback practice, assessment and feedback still receive the lowest satisfaction ratings in the NSS. Lecturers are discouraged when students fail to take note of their feedback, or sometimes do not collect assignments that have been marked. Understanding why feedback is not always acted upon remains an important area for researchers. This paper reports on an in-depth interview study with 14 final year undergraduates, reflecting on their perceptions of feedback written on marked assignments, by selecting examples of what they considered to be ‘good’ and ‘bad’ work. Findings suggested that emotional reactions play a significant part in determining how students will act on the feedback they receive, and the concept of ‘emotional backwash’ is introduced. 相似文献
18.
Negative feedback confronts learners with errors or failure but holds great learning potential. However, learners might perceive it as self-threatening, and thus react maladaptively. Feedback theories recommend prompting internal feedback prior to external feedback. And self-compassion is found to support adaptive reactions to failure. Thus, this study examined in a 2 × 2 factorial design the effects of prompting internal feedback or self-compassion, or both, on feedback perception and post-feedback learning behavior. Participants (N = 210) completed a brief difficult reasoning test and received failure feedback. Perceived acceptance and fairness of the feedback were higher in the internal feedback and self-compassion conditions compared to the control condition with no prompts. The intervention effects were higher for participants with high perceived competence and low trait self-compassion. No significant effects on post-feedback learning behavior were observed. The results highlight the relevance of internal feedback processes for feedback perception. 相似文献
19.
在工程教育专业认证中,创建科学的"达成度评价与反馈体系"对学生毕业要求能力培养环节的持续改进具有十分重要的指导意义。以天津理工大学机械电子工程专业工程教育专业认证为背景,通过改进现有的达成度评价方法,完善反馈与持续改进机制,体现工程教育专业认证理念,提出了"五评价,三反馈,四改进"的具有反馈机制的闭环毕业要求达成度评价法。以本专业2016届与2017届学生为例,计算毕业要求综合达成度情况,结果体现了专业持续改进效果,具有借鉴意义。 相似文献
20.
我国二语写作教学中"教师一次性评定"的传统评改模式制约着学生二语写作能力的发展。同伴互助交流并共同探讨写作任务,是将输出假设理论应用于二语写作的积极尝试。在二语写作过程中,通过学习者的互助互评,并反思同伴的意见反馈,对中国学生二语写作能力的构建和发展有积极的意义。 相似文献