Table of ContentsList of Figures vList of Tables viNotions and Abbreviations viiGeographically Encoded Objects for RSS feeds viiChapter 1 1Introduction .11.1. Introduction .11.2. Our approach .11.3. Thesis structure 2Chapter 2 3Web-based system: model, architecture .32.1. Introduction 32.2. Web-based system model .32.2.1. Static web model 32.2.2. Dynamic web model 42.3. Dynamic web-based system architecture .62.3.1. Three-tier architecture .72.3.2. Client design: Thin client and rich client .102.4. Web 2.0 and virtual community 112.5. Summary 12Chapter 3: .13Web-based Geographic Information System .133.1. Geographic Information System overview 133.1.1. Definition .133.1.2. Data representation in GIS system 133.1.3. Other terms in GIS system .15 3.2. Web-based Geographic Information System 153.3. Microsoft Virtual Earth 173.4. Summary 18Chapter 4: 19GreenPeace system 194.1. Introduction .194.2. Functional and non-functional requirements .194.2.1. Functional requirements 194.2.1. Non-functional requirements .204.3. System architecture 204.3.1. Presentation tier .214.3.2. Business logic tier 224.3.3. Data access tier 234.4. Summary 23Chapter 5: 24GreenPeace implementation 245.1. Introduction .245.2. Virtual Earth map control 245.2.1. Properties GIẢI PHÁP CHO BỆNH VIỆN IPS-ICU Series 710 Hệ thống điện cách ly (IT System) tích hợp thiết bị giám sát cách điện, tìm kiếm cảnh báo lỗi chạm đất hệ thống Ứng dụng: cho phòng mổ Khu vực điều trị tích cực Tiêu chuẩn IPS-ICU Series 710 Ứng dụng - Tuân theo tiêu chuẩn IEC 60364-7-710/ DIN VDE 0100-710: 2002-11/ TCVN 74477-710:2006 cho hệ thống trung tính cách ly (IT system) sử dụng Nhóm Bệnh viện - Tiêu chuẩn IEC 60364-7-710/ DIN VDE 0100-710: 2002-11/ TCVN7447-7-710:2006 yêu cầu tối thiểu cho tất thành phần hệ thống trung tính cách ly (IT system) nhóm Bệnh viện - IPS thiết kế lắp đặt với kích thước không gian nhỏ gọn Dễ dàng cho tích hợp vào hệ thống hệ thống sử dụng IPS-ICU-710, hệ thống phân phối điện mạng trung tính cách ly (IT system) sử dụng lĩnh vực y tế (Nhóm 2) phòng mổ, khu vực điều trị tích cực, chăm sóc đặc biệt bệnh viện Giải pháp - IPS-ICU, (hệ thống phân phối điện trung tính cách ly) tủ phân phối complete có kích thước nhỏ gọn với tính sử dụng thân thiện, chức mở rộng sẵn sàng kết nối với tủ phân phối khác hệ thống - Với chức đặc biệt vận hành: đa chức giám sát cách điện hệ thống tự động chuyển đổi nguồn cấp điện xảy cố (và ngược lại) - Tích hợp thiết bị phát cảnh báo lỗi cách điện hệ thống (IT system) online, giúp cho người vận hành, sửa chữa bảo dưỡng kịp thời dễ dàng Các tính chức - Thiết bị UEI-710-V.5 (ILT107.V4), đa chức giám sát chuyển đổi nguồn cấp điện; - Đo giám sát điện áp tự động chuyển đổi nguồn cấp điện sang nguồn cấp điện khác có cố (và ngược lại); - Giám sát tự động kiểm tra; - Giám sát cách ly, dòng điện nhiệt độ (máy biến áp cách ly) hệ thống cách ly (IT system); - Tự động phát lỗi cách điện tìm vị trí lỗi cách điện thiết bị IFS (upto 30); - Máy biến áp cách ly có công suất 3,15kVA – 10 KVA (tùy chọn); - Kết nối với hình thị BMTI1; BMTI2; BMTI4; BMTI5 thiết bị đầu cuối thông qua CAN bus; - Kết nối với hình FolioTec cho thị điều khiển thông qua CAN bus; - Sẵn sàng kết nối tủ phân phối khác mạng điện IT; - Tủ phân phối đáp ứng IEC 60364-7710/ DIN VDE 0100-710: 2002-11, Section 710.51.2.2; - Thiết kế lắp đặt theo chuẩn; - Tủ phân phối kiểm tra phòng kiểm định, kiểm tra độc lập; - Kích thước nhỏ gọn Lợi ích IPS-ICU dòng 710 Kích thước tủ nhỏ có không gian đấu nối rộng nhờ thiết kế compact (H x W x D 2000 x 350 x 400 mm) Lưu trữ số liệu, thông số vận hành báo lỗi theo ngày nhớ Thiết bị giám sát kiểm tra thường xuyên tuân theo DIN VDE 0100-710: 2002-11, Section 710.62 Tích hợp đệm với đồng hồ thời gian thực (RTC) Thiết bị giám sát cách điện hệ thống điều khiển UEI-710-V5 (ITL107.V4) dễ dàng cho lắp đặt thay nhanh Phương thức đo có độ tin cách cao giám sát cách điện tức Tự động giám sát hệ thống cấp điện cách ly (IT system) Phát lỗi tìm kiếm vị trí lỗi cách điện tức thiết bị IFS-710-W6 Biến áp cách ly kèm theo ngăn riêng biệt để tối ưu điều kiện nhiệt độ Thông số kỹ thuật (cơ bản) Sản phẩm Điện áp Điện áp điều khiển Dải công suất máy biến áp cách ly Kích thước (HxWxD) Số mạch điện đầu ra/1 cabinet (2 dây) Thiết bị giám sát cách điện chuyển đổi nguồn tự động UEI-710-V.5 (ILT107.V4) Điện áp (tuân theo chuẩn IEC 60664-1) Dải điện áp làm việc thấp IPS-ICU Series 710 230VAC 50/60Hz 230VAC 50/60Hz 3,15 / 4.0 / 5.0 / 6.3 / 8.0/ 10KVA 2000x350x400mm (Mở rộng H=2300 với đầu upto 24-30) 6/12/18/24/30 250VAC 150-230VAC (0,65-1Un) Dải điện áp làm việc cao Thời gian chuyển đổi nguồn điện cấp Thời gian chuyển đổi ngược lại Giám sát cách điện 230VAC Response value/hysteresis 230-260 VAC (1-1.13Un) 0-20s (bước 0,2s) tự đặt 0-20s (bước 0,2s) tự đặt 85 - 265VAC/ 50-60Hz parameterizable 50…250 kΩ / fixed +25% parameterizable 50…500 kΩ / ILT107.V4 Dòng điện đo 5-50A/4% Nhiệt độ (MBA) 120 độ C (sử dụng PTC) Giao thức truyền thông CAN/CAN2.0 ISO11898/ Có thể sử dụng Modbus/ nhị phân Kết nối thiết bị khác (màn hình vận hành, CAN bus trung tâm điều khiển,…) Hiện thị Các thông số vận hành, thông báo lỗi LED Dữ liệu vận hành lưu trữ Kết nối với thiết bị phát lỗi tìm kiếm vị trí lỗi cách điện tức thiết bị IFS710-W6 Tích hợp transducer Ngưỡng tín hiệu đáp ứng TEST 0,5mA Giám sát lên đến 30 mạch điện ra/1tủ ESA Elektroschaltanlagen Grimma GmbH Broner Ring 30 04668 Grimma Germany SIGMA VIETNAM SYSTEM JSC Add: Unit 42 TT38, Vanphu Urban, Hadong Dist, Hanoi City, Vietnam Tel: 04 6664 2225 Fax: 04 6664 2221 Hotline: 0962872211 Email: sales@sisys.vn Website: Sisys.vn PART 1: INTRODUCTION 1. Rationale Information Technology (IT) is a major force that has brought about revolutionary changes in the development of the global, digital society. Education is considered the foundation for development and the concept of IT use in education as powerful tools is strongly encouraged in Vietnam. The powerful tools which can help teachers to expand the four walls of the traditional classroom and rebuild the class without the walls are increasing in both quantity and quality with the advent of the technology era in the country. Regarding Second Language Teaching, IT has been considered as a tremendous potential tool. IT tools are various from using some popular software in teaching like Power point, Word Processor, Window media to others which are more complex like using Internet, WWW, Webquest, Weblog… to improve the language skills. Many articles have discussed the effectiveness of IT tools in SLT in the world. However, the application of IT tools in ESL in Vietnam was set forth by Nguyen Lan Trung and Ngo Van Nghiem (1997) who suggested the use of CD-ROM. The recent focus on technology in language study has been on the use of Power point, email and Internet (Nguyen Thu Hoai, 2005; Nguyen Thi Lan Huong, 2004; Pham Thi Ngoc Phuong,2006). The latest focused on the Webquest and Weblog effectiveness in ESP course. In spite of the claimed advantages of these researches, there is a limited number of studies on the developing the Vocabulary Acquisition in ESP course. These above-mentioned concerns urged the author to carry out the research, called: “A study on the effectiveness of applying IT tools in teaching Vocabulary in English for IT for the second year students at Vietnam – Korea Industrial Technology College (VKITC)” 2. Aims of the Study This study aims to measure the effectiveness of utilization of the class website in teaching English for IT vocabulary for the second year students at VKITC. Hence, it is expected to achieve the two following objectives: 1 - First, to investigate the influence of utilizing class website on the vocabulary outcomes of the second year students in English for IT Course at Vietnam Korea College. - Second, to investigate the learners’ opinions and attitudes towards the application of class website in ESP vocabulary teaching. - Third, to find out the difficulties students meet during the course. 3. Research Questions In order to achieve the aims of the study, the following research questions were raised: 1. To what extent does the employment of class website have influence on the effectiveness of teaching IT vocabulary for the 2 nd year students in IT Faculty at VKITC? 2. What are the students’ opinions and attitudes towards the utilization of the class website in their IT vocabulary learning? 3. What difficulties do students meet during the employment of the class website to improve their vocabulary acquisition? 4. Scope of the Study The present study operates within the following scope: (i) IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 54, NO. 1, FEBRUARY 2007 453 Power Converter Control Circuits for Two-Mass Vibratory Conveying System With Electromagnetic Drive: Simulations and Experimental Results ˇ Zeljko V. Despotovic ´ , Member, IEEE, and Zoran Stojiljkovic ´ Abstract—A mathematical model of two-mass vibratory con- veying system with electromagnetic vibratory actuator (EVA) and possible ways of their optimal control by using power converter is presented in this paper. Vibratory conveyors are commonly used in industry to carry a wide variety of particulate and granular materials. Application of electromagnetic vibratory drive com- bined with power converters provides flexibility during work. The use of a silicon-controlled rectifier (SCR) implies a phase angle control, which is very easy, but with many disadvantages (fixed frequency which is imposed by ac mains supply, poor power factor, mechanical retuning, etc.). Switching converters overcomes these disadvantages. Only then, driving for EVA does not depend on mains frequency. As well as amplitude and duration of excitation force tuning, it is also possible to tune its frequency. Consequently, complicated mechanical tuning is eliminated and seeking resonant frequency is provided. Previously mentioned facts motivated phase angle control and switch mode control behavior research for electromagnetic vibratory drives. Simulation and experimental results and their comparisons are exposed in this paper. The simulation model and results are given in the program package PSPICE. Experimental results are recorded on implemented control systems for SCR and transistor power converters. Partial results concerning the resonant frequency seeking process with transistor converter are also exposed. Index Terms—AC–DC power conversion, actuators, conveyors, current control, phase control, resonance, silicon-controlled recti- fier (SCR), switching circuits. I. I NTRODUCTION V IBRATORY movements represent the most efficient way of granular and particulate materials conveying. The con- veying process is based on a sequential throw movement of par- ticles. Vibrations of tank, i.e., “load-carrying element” (LCE), in which the material is placed, induce the movement of material particles, so that they resemble a highly viscous liquid, and the material becomes easier to transport and to dose. Due to influ- ences of many factors, the process of conveyance by vibration of granular loads is very complicated. The studies of physical process characteristics and establishment of conveyance speed Manuscript received November 3, 2004; revised April 20, 2006. Abstract pub- lished on the Internet November 30, 2006. This work was supported by the Ser- bian Ministry of Science and Environmental Protection. ˇ Z. V. Despotovic ´ is with the Mechatronics Laboratory, Mihajlo Pupin Institute, 11000 Belgrade, Serbia and Montenegro (e-mail: zeljko@robot.imp. bg.ac.yu; zdespot@hotmail.com). Z. Stojiljkovic ´ is with the Department of Electrical Engineering, Laboratory of Power Converters, University of Belgrade, 11000 Belgrade, Serbia and Mon- tenegro (e-mail: zorans@galeb.etf.bg.ac.yu). Digital Object Identifier 10.1109/TIE.2006.888798 dependence from parameters of the oscillating regime are ex- posed in [1]–[4]. These parameters are frequency and amplitude oscillations of LCE and waveform of the LCE kinematics tra- jectory. There are also references that consider dependence of particles velocity from angle of 2006/3 FAMD-VJCC Nguyen Van Thoan Head of Ecommerce Department Foreign Trade University How to apply Information Technology(IT) for SMEs in Vietnam How to apply Information Technology(IT) for SMEs in Vietnam March 2006 2006/3 FAMD-VJCC 1. 1. Overview of Ecommerce Vietnam and the World Overview of Ecommerce Vietnam and the World 2. E-commerce models in Vietnam 2. E-commerce models in Vietnam 3. Exploiting the commercial information systems on Internet 3. Exploiting the commercial information systems on Internet 4. Business Transaction Process by e-mails 4. Business Transaction Process by e-mails 5. E-contracts, digital signatures, e-payments 5. E-contracts, digital signatures, e-payments 6. E-commerce solutions for SMEs 6. E-commerce solutions for SMEs Contents Contents 1 minute ecommerce definition– “ “ Ecommerce is the sales and purchases of products and services Ecommerce is the sales and purchases of products and services through electronic means and communication networks, especially through electronic means and communication networks, especially computer and internet” computer and internet” + Horizontal (businesses management) + Horizontal (businesses management) : : Ecommerce includes all Ecommerce includes all or some business activities including marketing (M), sales (S), or some business activities including marketing (M), sales (S), distribution (D) and payment (P) through electronic means and distribution (D) and payment (P) through electronic means and communication networks communication networks + Vertical (macro management): + Vertical (macro management): Ecommerce includes Ecommerce includes - Infrastructure for Ecommerce - Infrastructure for Ecommerce (I) (I) - Electronic messages - Electronic messages (M) (M) - Basic rules - Basic rules (B) (B) - Specific rules - Specific rules (S) (S) - Application - Application (A) (A) Electronic commerce is the exchange of commercial information Electronic commerce is the exchange of commercial information through electronic means through electronic means UNCITRAL Model Law on Electronic Commerce, 1996 UNCITRAL Model Law on Electronic Commerce, 1996 UNCITRAL UNCITRAL United Nations Conference For International Trade Law United Nations Conference For International Trade Law “ “ Information :” Information :” everything which is tranfered by electronic everything which is tranfered by electronic technology, including but not only including: technology, including but not only including: + email, document files, data, excel files + email, document files, data, excel files + design, graphics, ads, + design, graphics, ads, + inquiries, orders, invoices, price lists, contracts + inquiries, orders, invoices, price lists, contracts + animated figures, movie, sound files + animated figures, movie, sound files UNCITRAL UNCITRAL United Nations Conference For International Trade Law United Nations Conference For International Trade Law “ “ Commerce” Commerce” is understood as widest meaning, including all the is understood as widest meaning, including all the issues originated from commercial relations, with or without issues originated from commercial relations, with or without contracts. Commercial relations includes, but not only include, the contracts. Commercial relations includes, but not only include, the following transactions: following transactions: + exchanges of products, services, representative, agent + exchanges of products, services, representative, agent + leasing, building, consultancy, enginnering + leasing, building, consultancy, enginnering + investment + investment + banking, insurance + banking, insurance + joint ventures and other business & industrial co-operations + joint ventures and RESEARCH Open Access Exponential energy decay and blow-up of solutions for a system of nonlinear viscoelastic wave equations with strong damping Fei Liang 1,2 and Hongjun Gao 1* * Correspondence: gaohj@hotmail. com 1 Jiangsu Provincial Key Laboratory for Numerical Simulation of Large Scale Complex Systems, School of Mathematical Sciences, Nanjing Normal University, Nanjing 210046, PR China Full list of author information is available at the end of the article Abstract In this paper, we consider the system of nonlinear viscoelastic equations ⎧ ⎪ ⎪ ⎨ ⎪ ⎪ ⎩ u tt − u + t 0 g 1 (t − τ)u(τ )dτ − u t = f 1 (u, v), (x, t) ∈ × (0, T) , v tt − v + t 0 g 2 (t − τ )v(τ )dτ − v t = f 2 (u, v), (x, t) ∈ × (0, T) with initial and Dirichlet boundary conditions. We prove that, under suitable assumptions on the functions g i , f i (i = 1, 2) and certain initial data in the stable set, the decay rate of the solution energy is exponential. Conversely, for certain initial data in the unstable set, there are solutions with positive initial energy that blow up in finite time. 2000 Mathematics Subject Classifications: 35L05; 35L55; 35L70. Keywords: decay, blow-up, positive initial energy, viscoelastic wave equations 1. Introduction In this article, we study the following system of viscoelastic equations: ⎧ ⎪ ⎪ ⎪ ⎪ ⎨ ⎪ ⎪ ⎪ ⎪ ⎩ u tt − u + t 0 g 1 (t − τ )u(τ )dτ − u t = f 1 (u, v), (x, t) ∈ × (0, T) , v tt − v + t 0 g 2 (t − τ )v(τ )dτ − v t = f 2 (u, v), (x, t) ∈ × (0, T) , u(x, t)=v(x, t)=0, x ∈ ∂ × (0, T), u(x,0) =u 0 (x), u t (x,0) =u 1 (x), x ∈ , v ( x,0 ) = v 0 ( x ) , v t ( x,0 ) = v 1 ( x ) , x ∈ , (1:1) where Ω is a bounded domain in ℝ n with a smooth boundary ∂Ω, and g i (·) : ℝ + ® ℝ + , f i (·, ·): ℝ 2 ® ℝ (i = 1, 2) are given functions to be specified later. Here, u and v denote the transverse displacements of waves. This problem arises in the theory of vis- coelastic and describes the interaction of two scalar fields, we can refer to Cavalcanti et al. [1], Messaoudi and Tatar [2], Renardy et al. [3]. To motivate this study, let us recall some results regarding single viscoelastic wave equation. Cavalcanti et al. [4] studied the following equation: u tt − u + t 0 g(t − τ)u(τ )dτ + a ( x ) u t + |u| γ u =0, in × (0, ∞ ) Liang and Gao Boundary Value Problems 2011, 2011:22 http://www.boundaryvalueproblems.com/content/2011/1/22 © 2011 fei and Hongjun; licensee Springer. This is an Open Access article distributed under the terms of the Creative Common s Attribution License (http://creativecommons.o rg/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. for a : Ω ® ℝ + , a function, which may be null on a part of the domain Ω. Under the conditions that a(x) ≥ a 0 >0onΩ 1 ⊂ Ω,withΩ 1 satisfying some geometry restric- tions and −ξ 1 g ( t ) ≤ g ( t ) ≤−ξ 2 g ( t ) , t ≥ 0 , the authors established an exponential rate of decay. This latter result has been improved by Cavalcanti and Oquendo [5] and Berrimi and Messaoudi [6]. In their study, Cavalcanti and Oquendo [5] con sidered the situation where the internal dissipa- tion acts on a part of Ω and the viscoelastic dissipation acts on the other part. They established both exponential and p olynomial decay results under the conditions on g anditsderivativesuptothethirdorder,whereasBerrimiandMessaoudi[6]allowed the ... thống trung tính cách ly (IT system) nhóm Bệnh vi n - IPS thiết kế lắp đặt với kích thước không gian nhỏ gọn Dễ dàng cho tích hợp vào hệ thống hệ thống sử dụng IPS- ICU- 710, hệ thống phân phối... Germany SIGMA VIETNAM SYSTEM JSC Add: Unit 42 TT38, Vanphu Urban, Hadong Dist, Hanoi City, Vietnam Tel: 04 6664 2225 Fax: 04 6664 2221 Hotline: 0962872211 Email: sales@sisys.vn Website: Sisys.vn... phối điện mạng trung tính cách ly (IT system) sử dụng lĩnh vực y tế (Nhóm 2) phòng mổ, khu vực điều trị tích cực, chăm sóc đặc biệt bệnh vi n Giải pháp - IPS- ICU, (hệ thống phân phối điện trung