Pháp Luật về bảo vệ môi trường không khí ở Việt Nam hiện nay

Authors: Đoàn, Thị Thùy Dương
Publisher: H. : Trường Đại học Kinh tế - Luận văn ThS. Luật: 603801
Description: 108 tr.
Full text: http://repository.vnu.edu.vn/handle/VNU_123/34169

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Response’s Probabilistic Characteristics of a Duffing Oscillator under Harmonic and Random Excitations

Authors:  Nguyen, Dong Anh Duong, Ngoc Hao Zakovorotny, V.L. Keywords:  Duffing;averaging method;equivalent linearization;harmonic excitation;random excitation Issue Date:  2014 Publisher:  H. : ĐHQGHN Series/Report no.:  Vol. 30;No. 1 (2014) Abstract:  Response’s probabilistic characteristics of a Duffing oscillator subjected to combined harmonic and random excitations are investigated by a technique combining the stochastic averaging method and the equivalent linearization method. The harmonic excitation frequency is taken to be in the neighborhood of the system’s natural frequency. The original equation is averaged by the stochastic averaging method in Cartesian coordinates. Then the equivalent linearization method is applied to the nonlinear averaged equations so that the equations obtained can be solved exactly by the technique of auxiliary function. The theoretical analyses of Duffing oscillator are validated by numerical simulation. ...
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Teachers’ and students’ attitudes towards the piloted textbook english 10: the case of Nghia Hung upper secondary school, Nam Dinh city

Other Titles:  Thái độ của giáo viên và học sinh đối với sách giáo khoa tiếng Anh 10 thí điểm: Nghiên cứu tại trường THPT Nghĩa Hưng A tỉnh Nam Định Authors:  HOÀNG, THỊ CÚC Keywords:  Tiếng Anh Giáo dục trung học Sách giáo khoa Issue Date:  2017 Publisher:  H. : ĐHQGHN Abstract:  The textbook is an useful tool for teaching and learning second language and one of the most important components of any educational environment that lead to success or failure of the teaching and learning language. This is especially true a Nghia Hung A Upper Secondary School where English teachers and students use the piloted textbook English 10 in the course. Also, the role of the teachers’ and students’ attitudes affects teaching and learning second language. According to Karahan (2007), “positive language attitudes let learner has positive orientation towards learning English” (p.84). Gardner, Masgoret, Tennant & Mihic (2004) claim that attitudes influe...
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Managing the Human Resource in the 21st century

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This study guide provides an overview of the most important topics and current debates covered in Human Resource Management (HRM) field. It aims to focus on one of the most important assets in organisations: people. The guide provides an understanding of what HRM is, how it functions and how people can be effectively managed as a resource in the 21st Century. It concentrates on the basics of organisational behaviour and HRM. It approaches HR issues by laying down the basic organisational factors that affect employees at work. http://repository.vnu.edu.vn/handle/VNU_123/18859
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