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String matching is an important part in today's computer applications and Aho-Corasick algorithm is one of the main string matching algorithms used to accomplish this. This paper discusses that when can the GPUs be used for string matching applications using the Aho-Corasick algorithm as a benchmark We have to identify the best unit to run our string matching algorithm according to the performance...
String matching or pattern matching algorithms are used in various applications. They are used to find the occurrences of a pattern in a given text or a pool of strings. They are widely used in text editors in computing machines, database queries, bio-informatics, chem-informatics, search engines and many more applications. String matching algorithms can be of two ways: single pattern matching and...
Frequency Modulated (FM) signals are encountered in many natural and human-made applications in earth, oceanic and atmospheric environments. In this paper, the limitations and optimality of existing FM signal characterization methods, in particular at low signal to noise ratios are investigated. For proper characterization, the selection of a time-frequency representation through spectrally smoothed...
This paper discusses the suitability of a voltage source converter (VSC)-diode bridge combination as a rectifier in industrial applications. This particular rectifier arrangement consists of a full rated diode bridge rectifier and a partially rated two-level voltage source auxiliary converter. This combination helps achieve power conversion at medium voltage with low voltage switching devices, improve...
An operational analysis of a multilevel active front end rectifier, which has the mitigating capability of the current harmonics generated by the nonlinear loads connected to the same power distribution bus would be presented in this paper. Undesirable conditions in the power network such as voltage unbalances and spikes can affect negatively on the operation of very sensitive electric devices. Thus...
Flood is a major natural hazard occur recurrently in Sri Lanka. Allocating victims to camps and provide medical facilities are two main activities at the immediate response phase of a flood and use of manual methods delayed this process. This project developed a geo-enabled application to support immediate response planning, mainly focusing on allocation victims to IDP camps, provide medical facilities,...
A new trajectory planning method for generating bounded and continuous jerk trajectories in joint space has been developed and tested. In manipulator trajectory planning, reduced jerk trajectories are desired for path tracking and vibration suppression. The proposed interpolation algorithm in this research generates a spline, composed with 5th-order, 3rdorder and 5th-order polynomial segments (5-3-5...
Microcircuits in the visual cortex of freshwater turtles have been revisited. These consist of a model of the retina, the lateral geniculate nucleus (LGN) and the visual cortex. In this paper, we present, via simulation how visual input on the retina is subsequently processed by the LGN leading up to an input to the cortex that generates a wave of activity. To gain access to the information content...
Due to the rapid evolution in multimedia technology, the multimedia data have been growing at a phenomenal rate. With the enormous amount of multimedia data, the richness of its information has raised the demand for sophisticated multimedia knowledge discovery systems. Multimedia documents requires distinct type of processing and knowledge discovery methods, due to the distinct characteristics of...
Smart Grid initiative requires improvements to distribution system operation. One of the improvements is to use battery storage to support the distribution system. These batteries have the ability to improve the system reliability. This work develops a simulation based reliability evaluation technique with detailed battery operation model. The state of charge of battery, loss of capacity over age...
This paper proposes two kinematic based task classification methods to aid control of a transhumerai prosthesis. The first method is a neural network based classifier where the angles of shoulder flexion/extension, shoulder abduction/adduction and elbow flexion/extension are considered. The angular values with their first and second derivatives are obtained to train the robotic arm for a selected...
Management of Electric Vehicle charging has gained significant interest mainly due its impacts on the distribution systems. Several control strategies which are proposed in the literature consider electric vehicle charging as time based signals on the system. This work proposes an alternative method by considering the charging as dynamic events on the distribution system. Proposed multi-state semi...
Image Deblurring algorithms have been evolving over many decades. Although there are many algorithms available today that produce reasonably good results, their speed of execution make them less appealing for many real time applications. Thus we address this issue by improving speed of execution of an existing algorithm using parallelization and other optimizations. The algorithm we selected was published...
Hybrid Renewable Energy System (HRES)s are gradually getting popular for both grid connected and standalone applications as an eco friendly, economical solution. A novel computational tool to model, simulate and optimize grid connected HRESs with V2G is presented in this study. Mathematical model is combined with a simulation algorithm to evaluate energy flows through the system devices and life cycle...
Automatic stroke recognition of badminton video footages plays an important role in the process of analyzing players and building up statistics. Yet recognizing activities from broadcast videos is a challenging task due to person dependant body postures and blurring of the fast moving body parts. We propose a robust and an accurate approach for badminton stroke recognition using dense trajectories...
The accurate prediction of runtimes of future job tasks on the nodes of a grid supplies vital information for the users to make CPU resource usage decisions. There are number of different approaches to predict runtimes of the future job tasks. These approaches range from the statistical to non statistical and some of them require expensive search algorithms or availability of the source code of job...
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