144 research outputs found
Fuel Air Explosives
In this paper, important features of Fuel Air Explosives studies on different performance parameters, namely, minimum initiation energy, fuel droplet size, sensitivity to detonation etc. and current trends in this field of research have been briefly discussed
Automatic Clustering with Single Optimal Solution
Determining optimal number of clusters in a dataset is a challenging task.
Though some methods are available, there is no algorithm that produces unique
clustering solution. The paper proposes an Automatic Merging for Single Optimal
Solution (AMSOS) which aims to generate unique and nearly optimal clusters for
the given datasets automatically. The AMSOS is iteratively merges the closest
clusters automatically by validating with cluster validity measure to find
single and nearly optimal clusters for the given data set. Experiments on both
synthetic and real data have proved that the proposed algorithm finds single
and nearly optimal clustering structure in terms of number of clusters,
compactness and separation.Comment: 13 pages,4 Tables, 3 figure
Robust seed selection algorithm for k-means type algorithms
Selection of initial seeds greatly affects the quality of the clusters and in
k-means type algorithms. Most of the seed selection methods result different
results in different independent runs. We propose a single, optimal, outlier
insensitive seed selection algorithm for k-means type algorithms as extension
to k-means++. The experimental results on synthetic, real and on microarray
data sets demonstrated that effectiveness of the new algorithm in producing the
clustering resultsComment: 17 pages, 5 tables, 9figure
Dynamic Behavior of Geogrid-Reinforced Soil
Geosynthetic materials particularly geogrids are widely used as reinforcement and is a proven technology for enhancing the performance of the foundation soil system under monotonic loadings. But the dynamic behavior of the reinforced foundation soil has not been well understood so far, and therefore dynamic loads (square wave pulse) of frequencies 0.2, 0.4 and 1 hertz under an amplitude of displacement of 2mm have been studied by carrying out dynamic plate loading tests on both unreinforced and the reinforced sandy beds. The size of the square plate is 150mm x 150mm x 30mm
Controllability and Observability of Kronecker Product Sylvester System on Time Scales
The main objective in this paper is to present the necessary and sufficient conditions for complete controllability, complete observability associated with kronecker product Sylvester system on time scales.2000 Mathematics Subject Classification: 93B05,93B07,49K15
Development of a perfect prognosis probabilistic model for prediction of lightning over south-east India
A prediction model based on the perfect prognosis method was developed to predict the probability of lightning and probable time of its occurrence over the south-east Indian region. In the perfect prognosis method, statistical relationships are established using past observed data. For real time applications, the predictors are derived from a numerical weather prediction model. In the present study, we have developed the statistical model based on Binary Logistic Regression technique. For developing the statistical model, 115 cases of lightning that occurred over the south-east Indian region during the period 2006–2009 were considered. The probability of lightning (yes or no) occurring during the 12-hour period 0900–2100 UTC over the region was considered as the predictand. The thermodynamic and dynamic variables derived from the NCEP Final Analysis were used as the predictors. A three-stage strategy based on Spearman Rank Correlation, Cumulative Probability Distribution and Principal Component Analysis was used to objectively select the model predictors from a pool of 61 potential predictors considered for the analysis. The final list of six predictors used in the model consists of the parameters representing atmospheric instability, total moisture content in the atmosphere, low level moisture convergence and lower tropospheric temperature advection. For the independent verifications, the probabilistic model was tested for 92 days during the months of May, June and August 2010. The six predictors were derived from the 24-h predictions using a high resolution Weather Research and Forecasting model initialized with 00 UTC conditions. During the independent period, the probabilistic model showed a probability of detection of 77% with a false alarm rate of 35%. The Brier Skill Score during the independent period was 0.233, suggesting that the prediction scheme is skillful in predicting the lightning probability over the south-east region with a reasonable accuracy
Forward Sweeping Method for Solving Radial Distribution Networks
ABSTRACT: Practical rural distribution feeders have failed to converge while using NR and FDLF methods. Therefore, a new load flow technique for radial distribution networks by using node and branch numbering scheme will be developed. In the forward sweep, the voltage at each downstream bus is then updated by the real and imaginary components of the calculated bus voltages. The procedure stops after the mismatch of the calculated and specified Voltages at the substation is less than a convergence tolerance. A Forward sweeping method for solving radial distribution networks will be implemented. Thus, computationally, the proposed method will be a very efficient and requires less computer memory storage as all data is stored in vector form. The load flow will be run in MATLAB for solving the equations
Marine Fish Calendar. 8. Veraval
The coastline of Gujarat, spread around 1,660 km is well known for its bombay duck and pomfret fisheries. Veraval located in the Saurashtra region forms one of the major fish landing centres. The average annual landing is around 50,000 t, forming about 20% of the catch of the Gujarat State. The peak landing period is from October to January by the trawlers. In Veraval it is observed that due to poor handling and storage facilities about 40% of the catch goes as trash fish and is used for manure and fish meal purpose
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