GPU Solver with Chi-square Kernels for SVM Classification of Big Sparse Problems

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 263
Author(s):  
Samreen Naeem ◽  
Aqib Ali ◽  
Christophe Chesneau ◽  
Muhammad H. Tahir ◽  
Farrukh Jamal ◽  
...  

This study proposes the machine learning based classification of medical plant leaves. The total six varieties of medicinal plant leaves-based dataset are collected from the Department of Agriculture, The Islamia University of Bahawalpur, Pakistan. These plants are commonly named in English as (herbal) Tulsi, Peppermint, Bael, Lemon balm, Catnip, and Stevia and scientifically named in Latin as Ocimum sanctum, Mentha balsamea, Aegle marmelos, Melissa officinalis, Nepeta cataria, and Stevia rebaudiana, respectively. The multispectral and digital image dataset are collected via a computer vision laboratory setup. For the preprocessing step, we crop the region of the leaf and transform it into a gray level format. Secondly, we perform a seed intensity-based edge/line detection utilizing Sobel filter and draw five regions of observations. A total of 65 fused features dataset is extracted, being a combination of texture, run-length matrix, and multi-spectral features. For the feature optimization process, we employ a chi-square feature selection approach and select 14 optimized features. Finally, five machine learning classifiers named as a multi-layer perceptron, logit-boost, bagging, random forest, and simple logistic are deployed on an optimized medicinal plant leaves dataset, and it is observed that the multi-layer perceptron classifier shows a relatively promising accuracy of 99.01% as compared to the competition. The distinct classification accuracy by the multi-layer perceptron classifier on six medicinal plant leaves are 99.10% for Tulsi, 99.80% for Peppermint, 98.40% for Bael, 99.90% for Lemon balm, 98.40% for Catnip, and 99.20% for Stevia.


GeoEco ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 127
Author(s):  
Maria Hedwig Dewi Susilowati

<p><span lang="IN">Drought and food insecurity are recurring disasters in Lebak Regency. The drought is one of the obstacles in increasing food production in Lebak Regency. The objectives of this study <span>are</span> (a) Making maps of the drought and food insecurity region in Lebak Regency; (b) Evaluating the relationship between regions of drought and food insecurity. The analytical method uses spatial analysis and <span>Chi-Square</span> correlation to determine the relationship between drought region and food insecurity region. <span>The results of the analysis concluded that</span></span><span> firstly, </span><span lang="IN">the region of very high drought levels</span><span lang="IN">concentrated in the northern region which was relatively near to the district capital and south (southwest) relatively far from the district capital</span><span>. Second, </span><span lang="IN">the classification of food insecurity found in Lebak Regency is food secure, rather food secure, instead of food insecurity and food insecurity</span><span>.</span><span>Third, </span><span lang="IN">the food insecurity and instead of food insecurity region tend to be in the region of moderate drought levels</span><span>. Fourth, </span><span lang="IN">based on food insecurity region indicators, it is found that the number of poor families and sources of clean water more determines the level of food insecurity, this can se</span><span>e</span><span lang="IN"> from the most significant score compared to other indicators</span><span>. Fifth, t</span><span lang="IN">he relationship between the drought level and food insecurity region is not significant at the 0.05 level, which means that the food insecurity and instead food insecurity region are not always in the high drought region.</span><span lang="IN"> <span>Likewise,</span> the region of food secure and instead food secure is not always in a <span>low</span> dry region.</span></p>


Author(s):  
Dilson Borges Ribeiro Junior ◽  
Jeferson Macedo Vianna ◽  
André de Assis Lauria ◽  
Emerson Filipino Coelho ◽  
Francisco Zacaron Werneck

Abstract The aims of this study were: 1) to evaluate the sports potential of young basketball players; 2) to identify variables that discriminate sports potential assessed by coaches; 3) to verifythe relationship between classification of the multidimensional profile of athletes and classification of the sports potential by coaches. Sixty-two young basketball players aged 15.6±1.1 years from U-15 (n = 24) and U-17 (n = 38) categories participated in the study. A test battery was applied to evaluate sports potential indicators: 1) anthropometric; 2) physicomotor; 3) psychological;4) skills;5) socio-environmental;6) maturational and 7) sports potential.Clusteranalysis was performed in three groups: high, medium and low potential. Student’s t-test was used for the comparison between athletes evaluated by the coach as excellent and the others and the Chi-Square test to verify the relationship between sports potential classifications. It was observed that in the high-potential group, athletes were chronologically older, with higher % predicted adult height (PMS), competitive and determined sports orientation, higher body size, lower skinfold summation, and greater physicomotor performance. In comparison with other athletes, high-potential basketball players presented higher stature, wider wingspan,longer limb length, greater predicted adult stature and higher Z score of the % PMS. It could be concluded that the multidimensional approach was useful for the evaluation of the sports potential of young basketball players, requiring the use of multidimensional variables, in addition to coaches’ opinion regarding the potential of their athletes.


2021 ◽  
Vol 8 (33) ◽  
pp. 3156-3162
Author(s):  
Hari Ram Jat ◽  
Neel Patel ◽  
Sitaram Barath ◽  
Pooja Yadav

BACKGROUND Perianal fistulas account for a substantial discomfort and morbidity to the patient thus affecting productive man hours and quality of life. Accurate pre-operative assessment of course of the primary fistulous track and secondary extension or abscesses is required for successful surgical management of anal fistulas. The purpose of this study was to diagnose and classify pre-operative perianal fistulas. METHODS This is a cross-sectional study at Department of Radiodiagnosis in a tertiary level hospital of southern Rajasthan from November 2018 to November 2020. The study included a total of 50 patients referred to department of radiology for magnetic resonance imaging (MRI). Statistical analysis was done using chi square test and student t test. RESULTS Out of these patients, 56 % were having secondary tract on MRI, 12 % patients were having abscess and 4 % were having horseshoe abscess on MRI. The commonest type of ano-rectal fistula encountered in the study was Grade -II seen in 32 %. CONCLUSIONS MRI is a highly accurate, rapid and non-invasive tool in pre-operative evaluation of the perianal and anal fistulas. MRI evaluation and classification of perianal fistulae has a high degree of diagnostic accuracy. The use of MRI for the diagnosis and classification of perianal fistula can provide reliable information which has both pre-operative and prognostic value. St James University Hospital classification, which is an MR imaging-based grading system for perianal fistula is very useful for effective radiological-surgical communication thus contributing to improved patient care and reduced rate of recurrence. KEYWORDS MR Fistulogram, Perianal Fistula, Anal Fistula, Fistula Classification, Fistulography


Author(s):  
Preethi D. ◽  
Neelu Khare

This chapter presents an ensemble-based feature selection with long short-term memory (LSTM) model. A deep recurrent learning model is proposed for classifying network intrusion. This model uses ensemble-based feature selection (EFS) for selecting the appropriate features from the dataset and long short-term memory for the classification of network intrusions. The EFS combines five feature selection techniques, namely information gain, gain ratio, chi-square, correlation-based feature selection, and symmetric uncertainty-based feature selection. The experiments were conducted using the standard benchmark NSL-KDD dataset and implemented using tensor flow and python. The proposed model is evaluated using the classification performance metrics and also compared with all the 41 features without any feature selection as well as with each individual feature selection technique and classified using LSTM. The performance study showed that the proposed model performs better, with 99.8% accuracy, with a higher detection and lower false alarm rates.


2017 ◽  
Vol 10 (15) ◽  
pp. 1-6
Author(s):  
K. Hari Prasada Raju ◽  
N. Sandhya ◽  
Raghav Mehra ◽  
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