基于Co-Teaching的噪声标签深度学习

大规模数据在人为标记时易出现标记误差,导致数据集存在噪声标签,影响深度神经网络模型的泛化。Co-teaching等现行研究方法中的样本选择机制易使噪声样本流入被选的干净标签样本子集,在训练中难以较好地控制深度神经网络模型对被选干净样本子集的拟合。因此,文中提出一个基于Co-teaching改进的新算法。该方法通过增加两个正则化损失来分别避免模型过于信任某单一类别和陷入局部最优解中。此外,引入大学习率衰减训练方法使模型在训练初期更倾向学习干净标签样本特征以得到较好的模型参数。与Co-teaching结果相比,文中模型在20%和50%对称噪声以及45%非对称噪声环境下,在MNIST、CIFAR-10合成噪声数据集及Animal10N现实数据集上的性能均取得了提升。

Experimental Study of Primary School Students’Independent Reading Based on the Network Teaching Platform

The development of information technology, especially the rise of online teaching platforms, has changed the way people read and the methods they use. Under this influence, primary school students’ independent reading has also been changed. However, due to limited self-control and understanding, primary school students face certain difficulties when using online teaching platforms for independent reading. Advantages and disadvantages of distance learning based on the network teaching platform were summarized in this paper. A one-year experiment study was carried out on our school fifth-grade students in independent reading using WeChat campus platform considering their current situation and existing problems of independent reading. In experiment study an independent reading mode was introduced. The results show that this reading mode can significantly improve students’ independent reading ability.

Book Review:The Socially Networked Classroom:Teaching in the New Media Age

This book is greatly appreciated for its collection of various innovative activities which could be applied in different levels of technology-savvy classrooms.It is regarded as guidance to show paths for language educators to teach in digital age,although most of the teachers today are digital immigrants who "have become fascinated by and adopted many,or most aspects of the new technology are,and always will be compared to them"(Prensky,2001).They have to attempt to equip themselves with the knowledge of new media,which aims to provide the current students with their needs to become fully literate in this digital age.However,when the Internet began to arrive in schools,it was embraced by educators already seasoned in the challenges of change.

The Necessities and Problems of Multimedia and Network Teaching in Vocational College English Teaching

With the development of social economy,the multimedia and network teaching is more and more important in college English teaching,especially in vocational college.It can not only help students to give full play to their collective consciousness and make our English course be full of vitality,but also make the amount of information in class redoubled.For the multimedia and network teaching,there're some problems in English teaching.So the multimedia and network teaching has both necessities and problems.

Application Status and Promotion Strategy of Integrated Network Teaching Platform——Taking Northwest A&F University as an Example

The development of Internet technology has brought convenience to the development of education and teaching,and has also changed the traditional methods and means of education and teaching. The construction of an integrated network teaching platform based on Internet technology brings new opportunities for the development of higher education. Taking the construction of the integrated network teaching platform of Northwest A&F University as an example,the current situation and existing problems in the construction of the integrated network teaching platform of the Northwest A&F University are explained. By proposing the promotion strategies for the application of the integrated network teaching platform,the construction of the integrated network teaching platform is improved,thereby facilitating the online and offline mixed teaching and further promoting the improvement of teaching level and teaching effect.

Adaptive Learning with Large Variability of Teaching Signals for Neural Networks and Its Application to Motion Control of an Industrial Robot

Recently, various control methods represented by proportional-integral-derivative （PID） control are used for robotic control. To cope with the requirements for high response and precision, advanced feedforward controllers such as gravity compensator, Coriolis/centrifugal force compensator and friction compensators have been built in the controller. Generally, it causes heavy computational load when calculating the compensating value within a short sampling period. In this paper, integrated recurrent neural networks are applied as a feedforward controller for PUMA560 manipulator. The feedforward controller works instead of gravity and Coriolis/centrifugal force compensators. In the learning process of the neural network by using back propagation algorithm, the learning coefficient and gain of sigmoid function are tuned intuitively and empirically according to teaching signals. The tuning is complicated because it is being conducted by trial and error. Especially, when the scale of teaching signal is large, the problem becomes crucial. To cope with the problem which concerns the learning performance, a simple and adaptive learning technique for large scale teaching signals is proposed. The learning techniques and control effectiveness are evaluated through simulations using the dynamic model of PUMA560 manipulator.

Analysis of the thinking method of English teaching under network environment

How to make a good job of foreign language teaching and improve the quality of teaching is a topic which the general teaching workers are facing, in this paper, the author express ideas from many aspects, multi-angle, multi-level, this brings a valuable theory reference on methods of English teaching which is under network environment. As for the problems of how to solve the bottle neck of English teaching, how to train the talent who are more adaptive to the world economy globalization, how to get rid of the traditional teaching method in teaching and how to improve the teaching level more efficiently, this paper gave some good methods and suggestions.

Research on College English Teaching Model Based on Multimedia and Network

Based on multimedia and network environment, college English teaching mode can effectively improve the teaching environment of traditional English teaching and students, and expand the capacity of English classroom information, and enrich the students’ English culture background. Therefore, as a teacher, we should first of all make efforts to learn new knowledge and teaching methods to improve our English professional quality. Strengthening the multimedia, network technology and educational psychology research, and put themselves in the teaching position. In addition, the college English teaching model based on multimedia and network environment can cultivate students’ independent thinking, autonomous learning, analysis and problem - solving ability, and promote the high efficiency of college English teaching.

On Constructing the Teaching Model of English Lexicology Based on Tasks and Network

The teaching model of English lexicology based on tasks and network starts by follow philosophy of intuitive thinking and using the task-based teaching method. It is characteristic mg of the educational five consecutive stages of students＇ presentation of PPT, the teacher＇s evaluation, the teacher＇s presentation, classroom interaction, and summary to enable students actively participate in class teaching and to guide them to construct RVL （the root-based vector lexicon）. The lexicon is constructed with the help of vector in the form of a diamond structure by utilizing the root ＂anthrop＂ functioning as a priming root and roots like ＂vest＂, ＂vor＂, ＂hab＂, ＂mov＂, and ＂somn＇ serving as target roots it motivates directly. The lexicon avails to accept new roots and make them mixed with existing roots by meaning relation or collocation to help students retrieve words effectively and enhance their ability of studying English vocabulary

Some Thoughts on Network Teaching of the Environmental Hydrology in Common Colleges and Universities

In the second term of 2019-2020,colleges and universities have launched a network teaching mode due to"novel coronavirus pneumonia"epidemic.The courses in colleges and universities are diversified due to the difference of majors.For the Environmental Hydrology,students often show different degrees of interest in learning this course.Of course,each student s own situation is different.Teachers should consider a variety of factors in online classroom,pay more attention to students performance,and give appropriate guidance in time.

On Practice and Exploration of College English Multimedia Network Teaching in China

With the development of the times, modem education technology constantly emerges, and modern college English classroom begins to tend to use multimedia network for teaching. One is that multimedia network teaching can enrich English teaching content. Two is that multimedia network teaching can make teaching process become full ofvigour, highlighting the dominant position of students in the classroom. Three, multimedia network teaching is conducive to improving the comprehensive quality of English teachers. In view of this, university English teaching should positively introduce multimedia network technology in teaching process, in order to promote English teaching quality to obtain great improvement.

Research on the Design of the Innovative Teaching Platform for College English Linguistics Based on Network Technologies

As a compulsory course for English majors in colleges and universities, English linguistics is of great significance to English majors in colleges and universities. However, as the English linguistics curriculum itself belongs to theoretical teaching, the teaching process requires the two-way interaction between teachers and students, so the teaching effect is not good. College English linguistics takes the cultivation of students' comprehensive abilities to use English as the premise, and emphasizes the cultivation of students' listening and speaking abilities to help students transmit the accurate written and oral information in the process of the social work and communication, thus improving students' English levels and preparing for their future international communication.

Research on the English Teaching Platform Based on the Campus Network Multimedia

The traditional teaching and the multimedia network teaching have their own advantages and limitations. The harmonious integration of these two teaching modes can make up for each other's weaknesses and give full play to the best overall effects o f our teaching. Guided by the constructivism theory, the humanism theory and the harmonious education theory, this paper explores the contradiction between the traditional foreign language teaching and the multimedia network teaching, expounds the characteristics of the two kinds of the teaching harmony, and puts forward solutions to how to achieve the harmony of the foreign language teaching.

Research on the Influences of the Invisible Environment of Language Laboratories on the Practical Teaching Based on the Network

There is a close relationship between the environmental factors and the human learning.The language laboratory is an important place for the foreign language learning.Building a good learning and practice environment of language laboratories plays an important role in the foreign language teaching.Learning can never take place in a vacuum.It always takes place in a variety of environments.Some of these environments may be more conducive to the development of the cognitive,emotional and social skills than others.

Research on Interactive Learning and Teaching based on Computer Network

This paper analyzes the basic interactivity connotation of network teaching from the interactive definition, function, types and level etc., and established the interaction quality evaluation index system from the four angles between student and media, the course content, teacher and peer interaction. Similarly, network instruction interaction also needs to carry on the design from the perspective of instructional design, and take full advantage of the Internet, and finally achieved good network interaction effect. Practice shows that, research on network interactive strategy significance.

Discussion on Network Classroom Teaching of the Meteorology and Climatology in Common Colleges and Universities

Most of the content of the course Meteorology and Climatology in common colleges and universities is what students are interested in,and most students have been exposed to or understood many contents.When studying this part of the content,students often show varying degrees of interest.Of course,each student s own situation is different.In classroom teaching,teachers should comprehensively consider various factors.Especially in the network classroom teaching situation,teachers should combine the learning content to use multi platform teaching in the teaching,students performance to flexibly carry out interaction between teachers and students,and students own situation to pay attention to individualized cultivation.

The study of the influence of network resources on English Teaching under the background of informatization

As an international language, English plays an extremely important role, and it has become the lingua franca of the world. For a long time, inefficiency exists in teaching or learning. Under the learning environment surrounded by native speakers, English, as a symbolic system, appears dull, or even because there is no information given appropriate experience and it becomes abstract. Many students are reluctant to learn after learning for a time, because it is difficult for reality, and it is not easy to consolidate, that 45 minutes of English learning environment also appears to be a little frustrated, as many students who have been admitted to the University said during the learning process of the entire university, they spent seventy percent of their energy to foreign language learning rather than their own major. This not only illustrates the importance of English teaching but also shows its difficult nature, the main reason is our bad English language teaching environment, there is a lack of communication in English language environment, however, the network information and the development of modern multimedia technology has greatly improve the English teaching environment. How to use the Internet information and multimedia technologies to create English learning environment, to optimize English teaching methods and to improve the quality of English teaching.

On Practice and Exploration of College English Multimedia Network Teaching in China

With the development of the times, modem education technology constantly emerges, and modern college English classroom begins to tend to use multimedia network for teaching. One is that multimedia network teaching can enrich English teaching content. Two is that multimedia network teaching can make teaching process become full of vigour, highlighting the dominant position of students in the classroom. Three, multimedia network teaching is conducive to improving the comprehensive quality of English teachers. In view of this, university English teaching should positively introduce multimedia network technology in teaching process, in order to promote English teaching quality to obtain great improvement.

Effectiveness Analysis of Flipped Classroom on Business English Teaching under Multimedia Network Environment

In the era of rapid technological development, business English teaching methods are in the development and changes and multimedia network technology gradually appeared. It has brought great convenience to business English teaching.This paper starts from the feasibility and necessity of multimedia network teaching in Business English to discuss the advantages of multimedia network Teaching Business English. Finally, it is to put forward multimedia network teaching mode, to provide practical recommendations for the majority of business English teacher during the multimedia network teaching.

Research Report on the Effect of Network Teaching Mode of Art Courses under the Concept of Ideological and Political Education

Since the National Conference on ideological and political work in Colleges and Universities,the Party Committee of Beijing United University has closely focused on the fundamental problem of“what kind of person to train,how to train and for whom to train”,and regards the course of ideological and political thinking as the fundamental measure to carry out the fundamental task of building up people by virtue.In 2020,in the event of the new epidemic situation,the school actively implemented the work plan of“stopping classes and not stopping learning”in Beijing,and opened the historic revolution of the whole school network teaching in education and teaching.In recent years,Beijing Union University in the“curriculum ideological and political”construction is constantly open up.In order to promote teaching practice and teaching research,the school teacher teaching development center set up the first teaching promoters of Beijing United University in 2019.The project team was set up by the school teaching promoters to study the effect of the online teaching mode of art courses under the concept of ideological and political education.