Student Conference on Research and Development
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Simulation and analysis of power converter harmonics
- Trang 213-216
The applications of large power electronic converter results in generation of low (LF) and high (HF) frequencies harmonics in the power system. The adverse effects of harmonics are widespread. In this paper, harmonic analysis was carried out on 3-phase fully controlled thyristor bridge. Methods of harmonic reduction have been used. It has been found that, the 12-pulse method is suitable in reducti......
#Analytical models #Harmonic analysis #Power conversion harmonics #Power harmonic filters #Power system harmonics #Power system simulation #Power generation #Bridges #Power electronics #Hafnium
Simulation of stable-adaptive control of robot arm using self-organizing neural network
- Trang 162-164
In this paper, a simulation of neural network controller for a three links robot arm is presented. The network is based on modified Kohonen's self-organizing map. In the proposed model, recurrent network and modified SOM network are interconnected.
#Robot control #Neural networks #Robot kinematics #Neurons #Computational modeling #Control systems #Recurrent neural networks #Nonlinear systems #Nonlinear control systems #Neurofeedback
Predicting transmittance, absorptions and reflectance characteristics for the design of transparent dome passive daylight collector
- Trang 208-212
Daylighting systems are a particular type of solar collector which may be used to provide illumination for the interior of a building by directing daylight into the building. Daylighting and thermal loads are very important design issues for passive daylight collector design. A mathematical model has been developed to predict the visible solar transmittance, absorptance and reflectance of a transp......
#Absorption #Reflectivity #Daylighting #Buildings #Mathematical model #Geometrical optics #Lighting #Thermal loading #Shape #Solar heating
Nonlinear function approximation using radial basis function neural networks
- Trang 326-329
Radial basis function neural networks (RBFNN) which are best suited for nonlinear function approximation, have been successfully applied to a wide range of areas including system modeling. The two-stage training procedure adapted in numerous RBFNN applications usually provides satisfactory network performance. Though this method is proven to allow faster training and improves convergence, the init......
#Function approximation #Radial basis function networks #Least squares methods #Least squares approximation #Clustering methods #Clustering algorithms #Intelligent networks #Modeling #Convergence #Multi-layer neural network
Radio resource and mobility management in GPRS network
- Trang 132-135
The General Packet Radio Service (GPRS) is a complex data network which upgrades current second generation GSM networks, offering true high-speed Internet (IP) and X.25 network connectivity over existing GSM cellular networks. The key benefits of GPRS are better use of radio and network resources and completely transparent IP support. The increasing population of mobile users leads to congestion p......
#Mobile radio mobility management #Ground penetrating radar #Radio spectrum management #Resource management #GSM #Packet radio networks #IP networks #Web and internet services #Land mobile radio cellular systems #Delay
Workflow interoperability using extensible markup language (XML)
- Trang 513-516
States of the art workflow management systems (WFMS) do not have adequate features of interoperability among WFMSs that cause incompatible "islands" of process automation within an organization or between organizations. This paper introduces method of interoperability that accommodates the variety of implementation techniques in realizing the WFMS interoperability. To realize the workflow interope......
#XML #Automation #Workflow management software #Research and development #Connectors #Markup languages #Communication standards #Prototypes #Availability #Analytical models
Implementation of video conferencing over IPv6 on the Linux platform
- Trang 375-377
Video conferencing allows people to simulate face-to-face conversations by integrating duplex transmission real-time audio and video with a computer system. IPv6 (also known as IPng-ng for new/next generation), provides 128-bit addressing (that is billions upon billions of addresses), compatibility with IPv4 addresses, security and authentication, quality of service (reserving bandwidth), plug-and......
#Videoconference #Linux #Quality of service #Bandwidth #Computational modeling #Computer simulation #Real time systems #Next generation networking #Authentication #Routing
Phân tích khí hòa tan sử dụng hệ thống chuyên gia Dịch bởi AI
- Trang 313-316
Dự án này nhằm nghiên cứu phương pháp phân tích khí hòa tan trong dầu cách điện của máy biến áp bằng cách sử dụng một hệ thống chuyên gia. Một nguyên mẫu của hệ thống chuyên gia dựa trên các kỹ thuật phân tích khí hòa tan để chẩn đoán các lỗi nghi ngờ của máy biến áp và các hành động bảo trì phù hợp cần thực hiện. Phương pháp này được đề xuất để hỗ trợ phương pháp tỷ lệ khí truyền thống dựa trên c......
#Phân tích khí hòa tan #Hệ thống chuyên gia #Dầu cách điện #Khí #Máy biến áp cách điện #Hydrogen #Cắt corona #Dầu mỏ #Các tiêu chuẩn IEC #Vật liệu điện môi và cách điện điện
Strategy to improve the indoor coverage for mobile station
- Trang 410-413
This paper presents an evaluation of whether the indoor signal strength for commercial buildings fulfills the cell planning requirement. In order to provide high quality cellular service, it is necessary to place an array of distributed antennas connected using feeder cable within the building. With the feeder cable approach, splitters and computer software, we develop using Visual Basic 6.0. The ......
#Enterprise resource planning #Power cables #Land mobile radio cellular systems #Land mobile radio #Floors #Building materials #Directive antennas #Antenna radiation patterns #Antenna arrays #Antenna feeds
Semi-active car suspension controller design using fuzzy-logic technique
- Trang 149-152
In this work, the development of fuzzy-logic controller for a semi-active car suspension system using (1/4) quarter car model is presented. The main aim of the controller is to minimize the body's displacement velocity. A passive suspension system responds only to the deflection of the strut. While the semi-active system setup can dissipate energy from the system at an appropriate time, in a way o......
#Vehicle dynamics #Shock absorbers #Damping #Magnetic levitation #Road vehicles #Tires #Force control #Fluid dynamics #Automobiles #Springs