Student Conference on Research and Development
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Các bài báo tiêu biểu
Worst month rain statistics measurement in Malaysia
- Trang 12-14
Excess attenuation due to rainfall is one of the most important constraints to
the performance of microwave radio links. In temperate climates at frequencies
above 10 GHz, rainfall rates have significant effects on the performance of
microwave radio links. Therefore, the behavior of radio communication links
varies seasonally over a year. This paper presents on the results obtained from
the analys...
#Rain #Statistics #Probability #Statistical distributions #Radio link #Attenuation measurement #Calendars #Statistical analysis #Time measurement #Frequency
Estimation of arrival modes of multipath signals in the tropical evaporation duct
- Trang 116-119
The angle-of-arrival (AoA) of a microwave radio signal propagating via the
tropical evaporation duct contains useful information about propagation modes
that support transmission well beyond the nominal radio horizon within the
region above a warm ocean surface. The characterisation of propagation modes
using the AoA has important applications in interference management and target
detection/rangin...
#Ducts #Microwave propagation #Electromagnetic heating #Oceans #Sea surface #Interference #Object detection #Signal resolution #Algorithm design and analysis #Wavelet transforms
Simulation of signal-to-interference ratio performance in GSM system employing switched beam smart antenna system
- Trang 422-425
Signal-to-interference ratio (SIR) is a major limitation factor in cellular
radio systems. Capacity, coverage and quality are general key drivers in
deploying any wireless system and they are all a function of SIR. Expanding
capacity through conventional methods such as deploying new cell sites or new
equipment upgrading is expensive and not always effective as it will introduce
more interference ...
#GSM #Communication switching #Directive antennas #Land mobile radio cellular systems #Mobile antennas #Mobile communication #Interchannel interference #Pattern analysis #Performance analysis #Directional antennas
Development of simple PWM inverter using photovoltaic cells
- Trang 297-300
This paper presents the development of a simple 1.5 kW single-phase sinusoidal
pulse width modulation (PWM) inverter. This inverter is designed to be either a
stand-alone or grid connected inverter from a direct supply of photovoltaic (PV)
cells. The developed inverter unit converts the DC input supply from the PV
cells into a clean sinusoidal voltage output. This power inverter is also
capable of...
#Pulse width modulation inverters #Photovoltaic cells #Pulse width modulation #Pulse inverters #Photovoltaic systems #Solar power generation #Energy consumption #Topology #Feeds #Bridge circuits
Scheduling divisible loads in non-blocking mode of communication: optimal sequencing and arrangement in a single-level tree network
- Trang 464-467
For the first time, the problem of scheduling divisible loads in a single-level
tree network in the non-blocking mode of communication is considered. All
earlier studies in divisible load scheduling have considered the blocking mode
of communication. A closed-form expression for the processing time in
non-blocking mode of communication is derived. Using this closed-form
expression, this paper anal...
#Processor scheduling #Closed-form solution #Intelligent networks #Optimal control #Communication system control #Instruments #Coprocessors #Delay #Computer networks
Improvement of virtual-time CSMA protocol for distributed hard and soft real-time systems on the Ethernet
- Trang 128-131
We present an improvement to the virtual-time CSMA (VTCSMA) protocol for
communicating mixed hard and soft real-time messages over an Ethernet. Work has
been done on communicating soft real-time messages using the VTCSMA mechanism.
Research has shown that this mechanism provides better loss rates compared to
the traditional collision-based CSMA/CD protocol. In a real-time system however,
hard and ...
#Multiaccess communication #Ethernet networks #Job shop scheduling #Circuits #Wiring #Real time systems #Humans #Media Access Protocol #Access protocols #Computational modeling
Virtual environment navigation using an image-based approach
- Trang 364-367
This paper investigates and illustrates the potential of using panorama virtual
reality to enhance Web-based library instruction. The project considers that
panorama virtual reality (VR) could be a powerful tool when comparing a
conventional tour and virtual tour. A VR tour as a whole can became a more
useful medium that allows navigating, viewing, reading, hearing and remote
access. This paper de...
#Virtual environment #Navigation #Virtual reality #Libraries #Rendering (computer graphics) #Layout #Visualization #Virtual prototyping #Auditory system #Application software
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
Một lớp điều khiển chế độ trượt cho các hệ thống không chắc chắn không phù hợp Dịch bởi AI
- Trang 31-34
Một phương pháp điều khiển chế độ trượt tỷ lệ - tích phân được đề xuất cho một
hệ thống có sự không chắc chắn không phù hợp. Bộ điều khiển được đề xuất có khả
năng cải thiện hiện tượng chattering. Một nghiên cứu mô phỏng cho một ví dụ số
được cung cấp để minh họa tính hiệu quả của thiết kế điều khiển này.
#Sliding mode control #Uncertain systems #Control systems #Equations #Uncertainty #Robust control #Control design #Control system synthesis #Lyapunov method #Asymptotic stability
Active network implementations
- Trang 371-374
Active networks have been described as networks that allow routing elements to
be extensively programmed by the packets passing through them. This allows
computation previously possible only at endpoints to be carried out within the
network itself, thus enabling optimizations and extensions of current protocols
as well as the development of fundamentally new protocols (see "The Switchware
Homepage...
#Computer networks #Protocols #Delay #Educational institutions #Routing #Computer architecture #Explosives #Web and internet services #Laboratories #Search engines