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Student Conference on Research and Development

 

 

 

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Các bài báo tiêu biểu

Design of artificial neural network (ANN) based rotor speed estimator for DC drive
- Trang 165-168
S.M. Mokhsin, R.A. Hadi, B.N. Sheikh Rahimullah
This paper describes the design of ANN based rotor speed estimator for separately excited DC motor using MATLAB Toolbox. A comparative analysis of the DC motor drive's behavior with and without ANN based was performed. It is shown that rotor speed feedback by suitably trained ANN enables very good quality of the drive performance over a wide range operating conditions for both open and close loop systems. For the purpose of the training, the Levenberg-Marquardt back-propagation algorithm was used. A standard three layer feed-forward neural network with tan-sigmoid (tansig) activation functions in hidden layer and purelin at the output layer was applied in this design. The result shows that by using only one hidden layer, minimum error can be obtained and the performance of the estimator is excellent. The proposed solution seems to be attractive to the conventional speed estimator, resulting a mechanically simpler motor and consequently increasing the degree of reliability for the whole drive systems.
#Artificial neural networks #Rotors #DC motors #MATLAB #Performance analysis #Neurofeedback #Feedback loop #Feedforward systems #Neural networks #Feedforward neural networks
Hệ thống nhắn tin dựa trên máy tính Dịch bởi AI
- Trang 66-68
J.A. Dargham, Tee Choon Chin, Ting Hsing Chih, A. Chekima
Một vấn đề phổ biến mà con người gặp phải trong các tổ chức lớn như trường đại học là cách giữ liên lạc với nhau khi họ di chuyển trong tổ chức. Do đó, vấn đề này có thể được coi là cung cấp cho họ khả năng gửi và nhận tin nhắn khi họ không có mặt trong văn phòng của mình. Trong bài báo này, chúng tôi trình bày một hệ thống nhắn tin dựa trên máy tính như một giải pháp khả thi cho vấn đề này. Hệ thống có hai phần chính, một giao diện và đơn vị hiển thị dựa trên bộ điều khiển vi mô, sẽ được đặt bên ngoài văn phòng của chủ sở hữu, và một chương trình dựa trên PC để quản lý hoạt động của hệ thống. Các tính năng quan trọng của hệ thống này gồm: được bảo vệ bằng mật khẩu; chủ sở hữu của hệ thống có thể chọn một tin nhắn để hiển thị trên giao diện và đơn vị hiển thị, qua đó thông báo cho khách truy cập biết vị trí của mình; khách truy cập, thông qua giao diện và đơn vị hiển thị, có thể để lại một tin nhắn thoại thông báo cho chủ sở hữu về việc họ đã đến; cùng với nhiều tính năng khác giúp chủ sở hữu quản lý tin nhắn văn bản và tin nhắn thoại; và vì các tin nhắn thoại được lưu trữ trên đĩa cứng của PC, số lượng và kích thước của chúng chỉ bị giới hạn bởi dung lượng khả dụng trên đĩa cứng.
#Humans #Protection #Space technology #Handicapped aids #Communications technology #Real time systems #Computer displays #Hard disks #Computer applications #Postal services
Vibration faults simulation system (VFSS): a system for teaching and training on fault detection and diagnosis
- Trang 15-18
A. Gani, M.J.E. Salami
Machine condition monitoring is vital in many plants as any shutdown can lead to both materials and financial losses. Since vibration fault signals and their causes are important for fault detection and diagnosis, a vibration faults simulation system (VFSS) is developed to gain good understanding of vibration faults signals. This paper is aimed at simulating and analyzing vibration fault signals, which can be useful for teaching and training purposes especially for companies dealing with predictive maintenance. To achieve this a vibration faults simulation rig (VFSR) is designed and developed to simulate and study most common vibration faults signals encountered in rotating machines. A LabVIEW-based data acquisition system (DAS) is used to process the fault signals. The complete system was developed and tested and the fault signals were compared with normal signals so as to ascertain the condition of the machine under investigation.
#Education #Fault detection #Fault diagnosis #Condition monitoring #Analytical models #Predictive models #Signal analysis #Predictive maintenance #Signal design #Rotating machines
Triển khai mạng thử nghiệm IPv6 gốc để đánh giá chất lượng liên kết mạng và phân tích hiệu suất Dịch bởi AI
- Trang 453-455
Y.M. Yussoff, M. Samad
Triển vọng nguồn cung không còn địa chỉ trong giao thức Internet hiện tại IPv4 đã thúc đẩy Nhóm Kỹ thuật Internet (IETF) bắt đầu các dự án IP thế hệ tiếp theo trong hai thập kỷ qua. IPv6 được phát triển với không gian địa chỉ 128 bit và nhiều nâng cấp khác hỗ trợ tự động cấu hình các máy chủ mới. Do thiếu thông tin về thiết kế và triển khai, các nhà thiết kế và kỹ sư mạng còn e ngại khi áp dụng IPv6 vào các doanh nghiệp hiện có. Một mạng thử nghiệm IPv6 hoặc nền tảng thử nghiệm sẽ được triển khai tại UiTM nhằm tích lũy kinh nghiệm và sự tự tin trước khi kết hợp với các mạng IP hiện tại. Nó cũng sẽ trở thành nền tảng cho nhiều thí nghiệm về đặc trưng liên kết IPv6 và các ứng dụng cơ bản khác của mạng IPv6 tại UiTM. Bài báo này mô tả các khía cạnh thực tiễn của việc thiết lập một mạng IPv6 gốc tại UiTM, cũng như đánh giá chất lượng liên kết mạng.
#Testing #Performance analysis #Protocols #Internet #IP networks #Space technology #Routing #Mobile computing #Research and development #Next generation networking
Online file storage system
- Trang 83-86
T.K. Rou, K.S. Al-Tahat, Z.B. Hassan
As computers become an increasing part of our lives at work, at home, and even while traveling, growth of the Internet has brought about a revolution in our daily lives with sophisticated online applications that provide us with tremendous ease of communication. The Internet offers a number of services ranging from mail servers and list servers to Web-based workgroup tools. With the increasing need to transfer and store digital data, Web-based file storage options have become popular among Web communities. A variety of storage formats is available over the Net, from free Web page servers to online photo galleries and online personal storage space. These storage options generally allow the storage and retrieval of data online. While most of these sites continue to focus on offering free Web sites and home pages, we have developed an online virtual space file storage system. This system is particularly customized to university and college communities. The file storage system helps people from different domains (e.g. students and lecturers) to manage, access, share and backup their files online, easily, efficiently and reliably. This paper describes features implemented in this system as a solution to handling floppies, storage limitation and unreliable copies of data.
#Web server #Educational institutions #Web pages #Application software #Web and internet services #Information retrieval #Computer networks #Computer science #Information technology #Power engineering and energy
Combination wavelets and artificial intelligent for classification and detection transient overvoltage
- Trang 177-180
S.R. Shah Baki, M.Z. Abdullah, A.F. Abidin
This paper describes a new method for classification of transient disturbance via fuzzy logic incorporated with wavelet processing. The transient is one of the major causes of power quality issues that have been experienced by the utility and consumer parties. The ability of a wavelet to detect the transient disturbance is being exposed. Finally, the fuzzy logic MATLAB is being proposed as a classification tool to differentiate between oscillatory and impulsive transient. This paper is an initial step towards auto-detecting the real-time power quality classification in a real time monitoring system.
#Artificial intelligence #Power system transients #Voltage #Power quality #Fuzzy logic #Lightning #MATLAB #Real time systems #Monitoring #Transient analysis
Nonlinear function approximation using radial basis function neural networks
- Trang 326-329
H. Husain, M. Khalid, R. Yusof
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 initial stage of selecting the network centers pose a problem of creating a larger architecture than what is required. This limitation holds true in applications with large data samples. Various techniques have been developed to choose a sufficient number of centers to suit the network structure. Orthogonal least squares and input clustering are two of such methods that show considerable results of which can provide an amicable solution to the above problem. This paper presents a comparative study on the performance achieved by the two techniques demonstrated when applying the RBFNN in modeling of nonlinear functions and an investigation based on their capabilities in handling over-parameterization problems.
#Function approximation #Radial basis function networks #Least squares methods #Least squares approximation #Clustering methods #Clustering algorithms #Intelligent networks #Modeling #Convergence #Multi-layer neural network
Improving productivity and efficiency of a vehicle seat assembly line in a manufacturing company
- Trang 94-97
N. Ismail, S.S. Tai, Z. Leman
This project is carried out to improve the productivity and efficiency of a vehicle seat assembly line in a local automotive vehicle part manufacturer. The existing vehicle seat assembly line is studied first using a line balancing and simulation approach. The data collected from the existing line are operating time and processes, material handling system, workstation layout and equipment and bill of materials. A new layout of the assembly line is proposed. The productivity and efficiency comparison of the existing assembly line and the proposed assembly line are also highlighted.
#Productivity #Vehicles #Manufacturing #Automotive engineering #Production #Workstations #Torque #Assembly systems #Standards development #Manufactured products
An investigation into the effect of metal and substrate thicknesses on the performance of m-derived MMIC lowpass filter
- Trang 403-406
A. Asari Sulaiman, Z. Awang
Describes the investigation of MMIC filter response using Libra simulator. The filter demonstrates a maximally flat passband with a cut-off frequency of 10 GHz. It is built on silicon and has a size of 1.296 /spl times/ 1.6 mm/sup 2/. The specified passband and stopband insertion losses are 0.2 dB and greater than 20 dB respectively. m-derived filter methodology and circuit configurations supported by theoretical derivation are presented in this paper. The metal and substrate thicknesses optimized in this study were found to improve the steepness of the filter response at cut-off. The overall size of the circuit is suited to MMIC technology.
#Impedance #Silicon #Equations #MMICs #Circuit simulation #Microwave filters #Low pass filters #Shunt (electrical) #Passband #Integrated circuit technology
Detection and prevention of active sniffing on routing protocol
- Trang 498-501
P. Ramakrishna, M.A. Maarof
The TCP/IP suite, the basis of today's Internet, lacks even the most basic mechanisms of authentication. As usage of the Internet increases, its scarcity of built in security becomes more and more problematic. This research project describes the serious DoS (denial of service) attacks against Internet Protocol control on a host computer and management protocol with an accent on the Internet control message protocol (ICMP), as well as some of the well known vulnerabilities of the inter domain routing protocols. All the present attacks have at least one common feature: they exploit intrinsic Internet Protocol security flaws. As tools that make this procedure of attacks extremely simple are starting to appear, we have chosen to research various detection and prevention techniques. This paper discusses various types of DoS attack, various tools involved and lastly the implementation stages of the research. The last section describes in depth of the current analysis stage.
#Routing protocols #Computer hacking #TCPIP #Computer errors #Computer bugs #Computer crime #Access protocols #Computerized monitoring #Microwave integrated circuits #Internet