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There are number of problems that are so complex/large that it becomes impractical or even in some cases impossible to solve these problems on a single machine. As compared to the serial computation, parallel computation is much result oriented for understanding, simulating of number of complex and real world physical process. The cache oblivious(CO) model helps us in designing the algorithms which...
The use of array antennas in satellite help providing the real time control of antenna beam pattern. Movable beam provide adaptability as well as flexibility and are particularly useful in providing satellite mobile services where multiple beams having high directivity are required. Failure of one or more elements of satellite array results in degradation of service and shifting null position which...
The min-cost covering problem (MCCP) is strongly NP-hard and has numerous applications in the logistics industry. Given that the one-dimensional MCCP is not practical in many scenarios, we establish the mathematical model of the two-dimensional min-cost covering problem (2-MCCP) and propose a firefly algorithm based approach (MCFA). In this novel approach, a heuristic algorithm is used to get initial...
A novel communication avoiding LU (CALU) algorithm is presented for solving matrix equations of Method of Moments (MoM). By using a new pivoting scheme, the communication pattern is changed in parallel LU decomposition. Matrix equations of MoM with three representative basis functions are solved. With the given CALU algorithm, one can significantly reduce the computation time from available commercial...
In this paper, we introduce SDM design method. This method analyses statistical data with a particular procedure. Using this method, we can acceptably design satellite subsystems. To implement SDM method, a complete database is required. Therefore, we first collect spacecraft data and create a database, and then we extract statistical graphs using SPSS, from which we further extract mathematical models...
Shadows on PV arrays influence the energy production performance negatively. There are many methods in the literature related to the detection of these shadows and reconfiguration of arrays. The methods proposed in the literature generally aim at reconfiguration of arrays and detecting shadow regions by using current (I), voltage (V) and power (P) information. In the process of reconfiguration it...
In today's fast-moving life many a pathological labs still use probabilistic approach to count the number of microscopic cells in a sample slide, which is a tedious job and not accurate all the time. The problem of finding the position of objects in an image as well as to count the occurrence of that object in the image is a hitch for the researcher. We have restricted our problem only to completely...
It has been observed that sometimes in Numeric Association Rule Mining (NARM), it is important to understand the association between a numeric attribute and a specific categorical consequent class attribute. NARM divides the domain of numeric attributes sub-domains without considering particular categorical consequent class attribute. Apart from this, it may also suffer from support-confidence conflict...
Based on the characteristics of PV array model, static and dynamic mathematical models of the single-stage PV power grid-connected generation system under the condition of power control are established in this paper. The voltage trajectory of PV array is studied by means of phase diagram analysis, which provides the basis for designing the maximum power point tracking algorithm. A step-power tracking...
In this paper, an efficient multi-mode CORDIC processing unit is implemented on a dynamically reconfigurable array. The array consists of 4×4 multi-functional Processing Elements (PEs). An efficient pipelined data-flow graph is proposed to implement to achieve a high data throughput and, in the same time, maximizing the resource utilization rate. The implementation results shows that, when compared...
In the paper we deal with control of spatially invariant systems described by parabolic partial differential equations with one temporal and one spatial variables. We propose an algorithm for design of deadbeat controllers. The algorithm is based on polynomial methods. It consists in solving a linear equation with bi-variate polynomials. Numerical example and simulations are included.
Inverse problems arise in various areas of science and engineering. These problems are not only difficult to solve numerically, but they also require a large amount of computer resources both in time and memory. It is therefore not surprising that inverse problems are often solved using techniques from high-performance computing. We consider the parallelization of an inverse problem in the field of...
Solar energy forms the major alternative for the generation of power keeping in mind the sustainable development with reduced greenhouse emission. For improved efficiency of the MPPT which uses solar energy in photovoltaic systems(PV), this paper presents a technique utilizing improved incremental conductance(Inc Cond) MPPT with direct control method using SEPIC converter. Several improvements in...
This Harnessing energy from the abundant and free sunlight is now a days a hot-topic among the research community. The availability of cheap solar modules has made it possible to harvest solar energy with better efficiency. The nature of solar modules is nonlinear and therefore the process of impedance matching is essential. The proper impedance matching ensures extraction of the maximum power from...
Set associative caches have fixed ways. All cache ways of accessed set are enabled during cache access. This paper proposes an algorithm to map address to fixed cache way of mapped set. The tag of the address is XOR'd with (w-1) in w-way set associative cache. The result is divided into blocks of size of number of cache ways w. The average of maximum and minimum of the frequency of the result of division...
This paper presents a comparative study between two maximum power point tracking (MPPT) methods in Matlab/Simulink program that are perturb-and-observe method and incremental conductance method. Starting from the implemented model of the photovoltaic (PV) array together with the buck converter and its MPPT control have been simulated the PV systems with both MPPT algorithms at different solar radiation...
Maximum power point tracking (MPPT) techniques are used in photovoltaic (PV) systems to maximize the PV array output power by tracking continuously the maximum power point (MPP) which depends on panel's temperature and irradiance conditions. The Perturb and Observe (P&O) MPPT algorithm is the most commonly used method due to its ease of implementation. But it has some drawbacks such as the oscillation...
Rapid modeling and model reusing has become an emergent problem to be solved in recent years, due to the sharp increasing popularity of character modeling. In this paper, we propose a combining-based method for rapid modeling the surface of three-dimensional character. We propose the algorithm for extracting the boundary points from the triangle mesh surface according to the characteristics of the...
Radon Transform and Divergent beam transform both are widely used projection methods in the field of computer tomography and signal processing. In this paper we reviewed the commonly use method for implement the projection method and then give a novel method for implement the projection, which is especially suitable for divergent beam transform in 2D. The method is based on the bresenham like line...
As the number of buses in multi-core SoC designs increase, bus planning problems become a dominant factor in determining the chip performance. To cope with these issues, it is desirable to consider them in the early floorplanning stage. Recently, many bus-driven floorplanners have been proposed in the literature. However, those proposed algorithms only consider the bus planning problem without the...
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