共查询到20条相似文献，搜索用时 31 毫秒
1.
This paper describes a Least Squares （LS） channel estimation scheme for MIMO OFDM systems based on time-domain training sequence. We first compute the minimum mean square error （MSE） of the LS channel estimation, and then derive the optimal criteria of the training sequence with respect to the minimum MSE. It is shown that optimal time-domain training sequence should satisfy two criteria. First, the autocorrelation of the sequence transmitted from the same antenna is an impulse function in a region longer than the channel maximum delay. Second, the cross-correlation between sequences transmitted from different antennas is zero in this region. Simulation results show that the estimator using optimal time-domain training sequences has better performance than that using optimal frequency training sequence at low signal-to-noise ratio （SNR）. To reduce the training overhead, a suboptimal training sequence is also proposed. Comparing with optimal training sequence, it has low computation complexity and high transmission efficiency at the expense of little performance degradation. 相似文献
2.
This paper studies English training for student volunteers at large scale sports events with a comprehensive investigation of the undergraduate student volunteers from Capital University of Physical Education who have taken part in large scale sports events.By examining the current volunteer training situation,the author finds that there is a sever lack of professional and systematical English training for student volunteers at large scale sports events.The study shows focusing on sports events knowledge and requirements of the volunteers’specific job is crucial to the service level of the volunteers.The study concludes that the problem can be solved by developing new course books,innovating new flexible training methods,and offering more comprehensive training content.The recommended training methods include intensive group training,computer aided teaching,task training and on-the-spot training to make them fit their work soon. 相似文献
3.
The findings of the present study affirm the value of strategy training.On the one hand,it shows strategy training is valid and feasible.On the other hand,it will benefit both language teachers and students in that it not only helps students become more successful to learn a foreign language but also provides teachers a meaningful way to focus their efforts.However,strategy training in this thesis is tentative,so the present study is subject to several limitations owing to the author’s lack of the experience. 相似文献
4.
This paper on pedagogical training of TCFL （Teaching Chinese as a Foreign Language） programs is based on the author＇s five-week study in the summer of 2008 at six Chinese universities. Based on class observations, interviews of teachers and students, and documents provided by the six universities, the author has found that their curriculum for pedagogical training is insufficient; theory and practice are often disconnected due to insufficient hands-on experience; and the training for cross-cultural communication skills needs to be improved. 相似文献
5.
Saleh A. S. Ewain 《美中教育评论》2005,2(11):36-40
The Institute of Public Administration （IPA）, in Saudi Arabia, is a well renowned training institution designated for training civil servants in the Kingdom of Saudi Arabia. This paper mainly discusses the uses of technologies in the administrative aspects of the IPA. The author also points out the obstacles faced and lessons learned from the implementation and use of these technologies. 相似文献
6.
7.
Learner autonomy is considered as one of the key educational goals in all the countries of the world since 1980s.In China,developing learner autonomy is particularly emphasized in College English Curriculum Requirements.Some researches have been made on developing learner autonomy,which seem to prove that the training of language learning strategies helps to develop learner autonomy.But because the traditional teaching method has been dominant in universities,college students,in particular art majors are passive and lose interests in English.Consequently,English teaching method must be reformed and learn er autonomy must be developed.In the relevant researches on learning strategy training and the development of learner autono my,the subjects are not involved in art majors.So the author tries to make a research in the field by combining with her teaching experience.Developing learner autonomy in art majors through the training of metacognitive strategies may lay the basis for their future learning and development,which is important for the college English teaching of art majors.Key wrods:learner autonomy;art majors;metacognitive strategy training 相似文献
8.
In order to remedy individual learner difference in English learning,a brief survey subjects’ needs was made before Metacognitive strategy training began.A Metacognitive strategy training is implemented outside the classroom.The method is that the teacher signs contracts with every student.Results from this training indicate that Metacognitive strategy training outside the classroom can improve different sides of different students more effectively in higher vocational English teaching. 相似文献
9.
Based on an analysis of the requirement of network-oriented NC lathe training system, a general framework of web-based training system is established. The key techniques for establishing this system include a three-layer web structure in building the general framework, the technique of VRML to model a virtual operating environment, and the access to the database using the ASP technique. 相似文献
10.
Eva Kenesei 《美中教育评论》2011,(5):698-710
The start of higher education of primary school teachers in 1959 marks a definitive step in a process. This training has had an effect on all areas. In terms of music training, different periods can be observed which appears during the full strategic change of the training. Professionals, however, have always tried to find the proper place for music which has to be fought for from time to time. Music education has never lost sight of the Kodaly concept in public education. We aim to prepare our students to internalize the abilities necessary to become a successful primary school teacher, keeping in mind the requirements of qualification for the major. In this process, the changes taken place in the Hungarian higher education were determinative. Music education practically has kept its place in general and special primary school teacher training. The major of primary school teacher is a definitive undergraduate course in the teacher training field. Its importance directly shows in public education. One of the crucial points of education should be the formation of values of schoolchildren. General education is a cultural level different in every society and age that a society sets as a standard for its members. This education itself should have a European culture as a prerequisite with Hungarian characteristics. 相似文献
11.
The needs analysis of Aviation Basic English course on ESP teaching is emphasized and the syllabus is designed here to instruct the better pre-job training for the students in the major of aircraft manufacturing technology. 相似文献
12.
A method of medical image segmentation based on support vector machine （SVM） for density estimation is presented. We used this estimator to construct a prior model of the image intensity and curvature profile of the structure from training images. When segmenting a novel image similar to the training images, the technique of narrow level set method is used. The higher dimensional surface evolution metric is defined by the prior model instead of by energy minimization function. This method offers several advantages. First, SVM for density estimation is consistent and its solution is sparse. Second, compared to the traditional level set methods, this method incorporates shape information on the object to be segmented into the segmentation process. Segmentation results are demonstrated on synthetic images, MR images and ultrasonic images. 相似文献
13.
Advice to mental health intervention for recruits based on an investigation for mental status of servicemen during basic military training 总被引：1，自引：0，他引：1
Basic military training consists of highly regimented training in the context of fairly extreme psychosocial stressors, and some recruits suffered from rigorous disturbance in mind. Even if practical measures which include instructive psychological intervention have been taken to ameliorate the disturbance, some questions still have not been settled in our practical work for recruits. For example, what are the manifestations of psychological problems for recruits？ What is the difference of the psychological problems at different stages during the training？ A perspective investigation was found that emotion disturbances before the training and somatic symptoms at the end of the 1st month of training are remarkable, which can be viewed as, if needed, target symptoms in the psychological intervention. While recruits got more objective social supports in the later training and their sleep status had not shown significant change during the military training. Based on the investigations, we also submitted our suggestion to mental health intervention for recruits, and this may be helpful for health education in the army. 相似文献
14.
INTRODUCTION In electrical engineering, laboratory experience is an integral part of the educational process. In fact, the amount of resources required to design and con-struct innovative experiments for electrical engi-neering education is relevant, and the number of in-stallations is often limited due to economic factors (Corradini et al., 2001). As a result, the possibility of experimental training for all the students is extremely reduced. With the rapid progress of Internet technol… 相似文献
15.
《延安教育学院学报》1997,(2)
According to the consideration of the advantage of drilling,it is usually a kind of prac-tice that helps students to acquire fluency in the language by training them to produce lan-guage patterns automatically and without conscious effort.But in recent years,there is agreat and heated arguement about drilling activities. 相似文献
16.
It has been suggested that the success of an ER project can largely rely on several elements,such as the selection of appropriate materials,establishment of management system,workshop for training teachers. Among those,teachers play an indispensable role due to the fact that it is the teachers who are capable of turning conceptions into actions,who get students engaged and bridge and gap between the goals of the programme and the reality in classroom. This paper is an attempt to outline a detailed picture to demonstrate how to offer effective training courses which can enable teachers to play“multiple roles”to make great contribution to the development of an ER project. 相似文献
17.
Without sufficient real training data, the data driven classification algorithms based on boosting method cannot solely be utilized to applications such as the mini unmanned helicopter landmark image detection. In this paper, we propose an approach which uses a boosting algorithm with the prior knowledge for the mini unmanned helicopter landmark image detection. The stage forward stagewise additive model of boosting is analyzed, and the approach how to combine it with the prior knowledge model is presented. The approach is then applied to landmark image detection, where the multi-features are boosted to solve a series of problems, such as rotation, noises affected, etc. Results of real flight experiments demonstrate that for small training examples the boosted learning system using prior knowledge is dramatically better than the one driven by data only. 相似文献
18.
Saida Kacem Laurence Simonneaux 《美中教育评论》2009,6(2):44-47
This research starts from a relatively optimistic thinking based on the fact that the teaching of the socioscientific issues through the practice of argued debates can contribute positively towards education in scientific citizenship. The teaching of techno-sciences raises topical questions which interfere in the classroom and at the same time carry scientific and social controversies within which it is possible to anchor the construction of new knowledge and citizen＇s behaviours. These controversial issues raise more questions and motivate the pupils more. Setting these topics for debate in the classroom could ＂restore, if only a little, what＂ Astolfi likes to call ＂the taste of knowledge （savoirs） ＇since the two words （saveur and savoir） come from the same Greek root＇ sapere＂, as Astolfi, 2006, marvellously put it in the foreword to the recent book How to teach socially acute questions （Legardez ＆ Simonneaux, 2006）. The present contribution is research in progress. It questions a protocol of training of future teachers. The principal objective is to train the pre-service teachers to teach socioscientific issues （SSI）. Like Funtowicz and Ravetz （1992, 1993）, we think that the SSI belong to ＂Post-Normal-Science＇. Accordingly, we will study the contribution of the training in epistemic, social and ethical values in the analysis of socioscientific issues by biology and philosophy future teachers. We will analyze the evolution of teacher trainees＇ decision-making after training on 3 socioscientific issues （the oncomice, the baby drug, the therapeutic cloning） and the impact of this socioepistemologic and ethical training on their teaching practices. 相似文献
19.
DU Wei-wei 《海外英语》2015,(1)
According to College English Curriculum Requirements (2007), reading is the main training aim of our college English teaching. And for the college graduates, reading is the main way through which they ... 相似文献
20.
Deborah K. Zuercher Cristy Kessler Jon Yoshioka 《美中教育评论》2011,(1):1-13
The CAST （content area specialized training） model of professional development enables sustainable teacher leadership and is responsive to the need for culturally relevant educational practices. The purpose of this paper is to share the background, methods, findings and recommendations of a case study on the CAST initiative in Guam. The case study is worth a look given that 100% of the participants in the CAST initiative indicated that they were satisfied with the CAST model of professional development. 相似文献