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Based on linear combination with differential Gaussian pulse, a designing impulse radio waveforms method for Ultra Wideband (UWB) wireless communications was investigated. According to the spread spectrum effect of the shaping factor and differential coefficient, a simple pulse design method on constructing differential Gaussian pulse was proposed that made use of a linear only triple-pulse combination...
Course timetabling usually arises every academic year and is solved by academic staff with/without course timetabling tool. The desirable timetable must be satisfied by hard constraints whilst soft constraints are not absolutely essential. Course timetabling is known to be NP-hard problem, which means that the computational time required to find the solution increases exponentially with problem size...
In this paper, we present a novel technique for localizing an event of interest in an underwater environment. The network consists of randomly deployed identical sensor nodes. Instead of proactively localizing every single node in the network as all proposed techniques set out to do, we approach localization from a reactive angle. We reduce the localization problem to the problem of finding 4-Node...
Low Extra Delay Background Transport (LEDBAT) is a delay-based Internet congestion control mechanism developed to allow fair and efficient data transfer when delay-sensitive and file sharing applications co-exist in networks. A LEDBAT source increases its congestion window until a fixed, pre-defined target queue delay is experienced. This paper analyses LEDBAT congestion control showing that the current...
Production scheduling in multiple-stage multiple- machine multiple-product environment is a NP hard problem usually faced by make/engineer-to-order companies engaged in capital goods Industry. Feasible schedules must correctly sequence the operations required to manufacture components and also satisfy assembly precedence relationships. This paper presents the development of Artificial Bee Colony algorithm...
A lot of semantic information is lost due to keyword centric approach of information indexing. Web search should be based on `context' of the query and not only on the keywords in query. It is only possible when a context from a query as well as document is sensed and which requires a context based indexing approach. A model for contextual indexing has been proposed which will try to find direct and...
Sensor placement in a wireless sensor network, that consists of a number of target points, determines number and locations of sensors required to cover the points. In this paper, we define a sensor placement problem called HPC to cover a large number of target points with various coverage requirements using a minimal number of sensors. We divide this problem into sub-problems and then design an algorithm...
Adaptive array smart antenna involves the array processing to manipulate the signals induced on various antenna elements in such way that the main beam directing towards the desired signal and forming the nulls towards the interferers. Such smart antennas are widely used in wireless mobile communications as they can increase the channel capacity and coverage range. In adaptive array smart antenna,...
The multiple pattern matching has always been a significant principle for applying to a network security system. This principle is adapted to accommodate the target patterns to be detected in a pre-processing phase, and the objective text and the suspect patterns are simultaneously detected by comparing with the existing structure. This research article introduces a new algorithm of multi-string pattern...
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