Teacher-Centered or Students-Centered Class

Most of the Chinese classes are teacher-centered. Students are always busy listening to their teacher and taking notes, while the leacher speaks from the beginning to the end in the class. But I don't think the teacher-centered class has many advantages. It will make students passive listeners. In my opinion, the class should be students-centered. A students-centered class has more advantages than a teacher-centered class. Firstly, the students are more likely to concentrate their minds. If the teacher pays more attention to their students and attaches much importance to whether their students are interested in what he says, it will be less easily for their students to daydream. Secondly, the students will cooperate better with their teacher, and the teacher can get the feedback through their students' questions and improve his teaching accordingly. Thirdly, the students will be more active and creative. They can discuss or debate with each other, therefore they may get a deeper understanding, or sometimes even present creative ideas which will arouse the inspiration of the teacher. In a word, in the students-centered class, the students will feel that they want to study rather than teaches want them to. So I think students-centered class is better than teacher-centered class.
And forever has no end
Life is a pure flame
Stray birds of summer come to my window
vagrant of the world
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Social Security Card

Dear Social Security,
　　I am applying for a new Social Security Card.
　　I lost my old one last week. I was walking home from the subway station, and I pulled a tissue （纸巾）out of my pocket and lost my wallet at the same time. My card was in my wallet. Please send me a new card. ff you can get the card to me within two weeks, please sent it to the address at the top of the page. If it will take longer than this, then you will have to send it to my new address. I am moving on May 23rd to:
　　103 Walnut Street
　　Philadelphia, PA28445
　　If you can send my new card within two weeks, I would be very pleased. I am applying for a new job at Ventura Savings Bank, and I know they will want to have my Social Security Number. Unfortunately I have forgotten it, so I will need my card to find out. On my old card I was called Victoria Matthews. Since then I have gotten married. Please issue my new card in my married name: Victoria Villata. In case you need more information about me to hunt down my old number, my date of birth was September 11, 1985. Thank you very much.
Don't cry, smile
you are my sunshine
single is simple，double is trouble
Life is like a boat
always together，forever apart
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assistant for manager

The position of administrative manager and assistant for manager, so as to make use of rich work experience, including modern enterprise cheap evening dresses management, executing commercial plan, coordinating and management administrative affairs.Expect to make some contributes for the development of your company in my efforts and win myself the higher value.

Dealt with daily affairs and associates chi flat iron store management;Classified and arranged demands about the ERP from the business department to deal with, assisted manager to analyze and treat the important issues;Delivered the policy of the top management to regional directors and collected the feedbacks;Negotiated, prepared and filed the contracts of the instruments purchasing and maintaining;Assets management effectively, developed the inventory plan and inventory on schedule;Cost management, arranged idle assets, so as not to waste resources;Application and payment according to contracts, communicated with vendors for the blog lace wedding dresses services and other items;Tracing the special projects, included the application of the price tags and POP program, HR EIP system promotion, network rectification, supervised the discount wedding gowns process and prepared the reports;Summarized system application methods, drew up ugg boots 2010 manuals for users, included system fleet direction, data process instruction and software operation specification;Arranged training related, included internal skill training and ERP process training for the business divisions;Organized the activities.

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communication technologies

Ultra-Wideband is a new type of wireless communication technologies in recent years. It has the advantages of high data rate, low-power, anti-multipath capability, easy and low-cost structure, etc, opening up new opportunities for the development of ralph lauren polo shirts wireless communications. In the Ultra-wideband wireless communications systems, the receiver must understand the transmission channel characteristics, in order to ensure the reliability and effectiveness of communications. Therefore, channel estimation is one of the key technologies in the Ultra-wideband wireless communication systems.First the paper introduces the concept of ultra-wideband wireless communication systems, characteristics and signal waveforms, focusing on channel cheap Wholesale nike shoes models for UWB system; then we study UWB based on OFDM. On this Lacoste Polo basis, the paper focuses on the channel estimation algorithms for UWB based on OFDM, including the LS, MMSE, the chi flat iron estimation algorithm based on DFT. And in the channel conditions of the cheap wedding gown dresses UWB, we use the Matlab to simulate and analyze a variety of the channel estimation algorithms. Through the analysis of the traditional channel estimation algorithms, the algorithm based on DFT estimation in terms of performance and the achievement has a clear advantage, but the algorithm will encounter the problem of data length, which will affect the accuracy of channel estimation, so we need to modify this algorithm. For the characteristics of channels in UWB, the paper presents an algorithm for the UWB system based on DFT estimation. The algorithm can adaptively select the filter length of the best properties, improving the performance of channel estimation, effectively allowing the system to achieve optimal performance of the receiver , having some practical value in engineering.
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