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16
result(s) for
"Canberra distance"
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Wheat leaf diseases classification and severity analysis using HT-CNN and Hex-D-VCC-based boundary tracing mechanism
2023
Wheat is one among the significant crops for humans. Significant fungal illnesses of wheat are brought on by multiple pathogens. Wheat output could be enhanced by the early identification of wheat leaf disease. Thus, a novel hyperparameter tanh-based convolutional neural network (HT-CNN)-based wheat leaf disease prediction is proposed with its severity level. Here, initially, the red, green, and blue (RGB) images are converted into a hue saturation value (HSV) image. Next, the small probability space filtering is applied to the V component. Afterward, the contrast of the V component has been enhanced. The obtained HSV image is converted into the RGB image. Then, by employing weighted Canberra distance-based K-means (WCD-K means), the affected and normal regions are segmented. Next, the image is binarized. Afterward, for tracing a boundary around disease-affected region, the hex directional vertex chain code (Hex-D-VCC) is applied over the binarized image, and then the features are extracted. By employing baker’s map-based Harris hawks optimization (BM-HHO), the optimal features are selected. For classifying disease, the selected features are further given into the HT-CNN, and the severity level is calculated to minimize the yield loss. As per the experimental result, the proposed model shows higher accuracy and efficacy when analogized to the other methods.
Journal Article
Automated Data Monitoring Using a Canberra-Based Drift Score
by
Piryankov, Konstantin
,
Efremov, Aleksandar
,
Karamfilov, Aleksandar
in
Artificial intelligence
,
Automation
,
Canberra distance
2026
Ensuring the consistency of recurring ETL processes is a critical challenge in large-scale financial analytics, where upstream data changes—such as variable redefinitions, unit conversions (e.g., from days past due to number of overdue installments or currency changes), or erroneous submissions following source system updates—can silently degrade model reliability. These risks are amplified in automated modeling environments, where dozens of models are retrained monthly for each financial institution and the number of serviced institutions is expected to grow. This study presents an automated statistical monitoring framework for continuous quality assurance of monthly ETL outputs used in model development. The approach quantifies drift between a reference dataset and successive data deliveries using descriptive univariate and bivariate statistics combined with a normalized Canberra-based drift score, aggregated into interpretable variable-level stability measures. Sensitivity is evaluated through controlled noisification experiments with increasing Gaussian perturbations, demonstrating a monotonic decline in stability scores and consistent directional shifts in complementary metrics such as the Gini coefficient and Kolmogorov–Smirnov statistic. The results show that the framework effectively detects both subtle and large-scale distributional changes, providing a scalable, interpretable, and reproducible monitoring diagnostics suitable for fully automated financial data pipelines, with flexibility for extension.
Journal Article
Determining the Number of Instars in Simulium quinquestriatum (Diptera: Simuliidae) Using k-Means Clustering via the Canberra Distance
2018
Simulium quinquestriatum Shiraki (Diptera: Simuliidae), a human-biting fly that is distributed widely across Asia, is a vector for multiple pathogens. However, the larval development of this species is poorly understood. In this study, we determined the number of instars in this pest using three batches of field-collected larvae from Guiyang, Guizhou, China. The postgenal length, head capsule width, mandibular phragma length, and body length of 773 individuals were measured, and k-means clustering was used for instar grouping. Four distance measures—Manhattan, Euclidean, Chebyshev, and Canberra—were determined. The reported instar numbers, ranging from 4 to 11, were set as initial cluster centers for k-means clustering. The Canberra distance yielded reliable instar grouping, which was consistent with the first instar, as characterized by egg bursters and prepupae with dark histoblasts. Females and males of the last cluster of larvae were identified using Feulgen-stained gonads. Morphometric differences between the two sexes were not significant. Validation was performed using the Brooks–Dyar and Crosby rules, revealing that the larval stage of S. quinquestriatum is composed of eight instars.
Journal Article
Bearing fault diagnosis based on enhanced Canberra distance feature in SDP image
by
Wang, Wei
,
Sun, Yongjian
,
Peng, Jigang
in
Artificial intelligence
,
Bearings
,
Canberra distance
2024
Feature enhancement is important in mechanical equipment fault diagnosis. A limited set of characteristic parameters is insufficient for diagnosing bearing signals with multiple fault types. The presence of noise increases the difficulty of extracting fault features from images. To address the challenge of diagnosing rolling bearing faults in complex environments, this study presents an enhanced weighted image fusion framework aimed at enhancing fault features within the images, which enables accurate diagnosis of bearing faults using a limited number of features. The proposed method encompasses four distinct stages. In the first stage, a symmetrized dot pattern method is employed to transform one-dimensional time-series data into two-dimensional images, visualizing the signal in a 2D format. In the second stage, image binarization and an improved weighted fusion method are utilized to simplify subsequent processing and enhance the image features. The third stage involves extracting the image’s contrast and maximum singular value to improve the Canberra distance calculation. Finally, the enhanced Canberra distance is used for classifying bearing faults. Performance testing of the image feature enhancement is conducted on various datasets containing rolling bearings. Comparative experiments with alternative enhancement methods demonstrate the superiority of the proposed improved weighted image fusion framework. Comparative experiments with the original Canberra distance validate the effectiveness of the enhanced Canberra distance. Additionally, experiments conducted in noisy environments confirm the robustness of the proposed approach. Furthermore, the image feature enhancement method is applied to other bearing datasets, and the experimental results demonstrate its effectiveness in enhancing fault feature representation and achieving accurate diagnosis of rolling bearings.
Journal Article
Fractional Jensen–Shannon Analysis of the Scientific Output of Researchers in Fractional Calculus
2017
This paper analyses the citation profiles of researchers in fractional calculus. Different metrics are used to quantify the dissimilarities between the data, namely the Canberra distance, and the classical and the generalized (fractional) Jensen–Shannon divergence. The information is then visualized by means of multidimensional scaling and hierarchical clustering. The mathematical tools and metrics allow for direct comparison and visualization of researchers based on their relative positioning and on patterns displayed in two- or three-dimensional maps.
Journal Article
Adaptive routing scheme for reliable communication in vehicular ad-hoc network (VANET)
by
Subramaniam, Shankar S.
,
Sivasubramanian, Karthikeyini S.
in
Adaptive algorithms
,
Bit error rate
,
Communication
2020
In a wireless communication system, due to the presence of the surrounding objects, the amplitude of the received signal rapidly changes by reflection, diffraction, and scattering and noise is added to the received signal. This prompts multipath fading and interference, which affects the quality of communication. The proposed Adaptive Routing Scheme (ARS) considers the algorithm Reliable Routing (RR) using Average Bit Error Rate expressed in Nakagami-m fading channel (ABERN-m) to predict the quality of the link, the Energy Efficient Routing (EER) calculates Remaining Battery Energy (RBE) to extend the network lifetime. The Canberra Distance Measure (CDM) is used instead of Euclidean Distance Measure (EDM) to improve the accuracy of distance measurement in mobile nodes. The aim of the proposed scheme is to predict the best optimal path and maintain the consistent path to enhance the Quality of Service (QoS) in real-time communication to improve efficient traffic on the road.
First published online 5 June 2020
Journal Article
A Canberra distance-based complex network classification framework using lumped catchment characteristics
by
Istalkar Prashant
,
Unnithan S L Kesav
,
Biswal Basudev
in
Algorithms
,
Catchments
,
Classification
2021
Hydrological prediction in ungauged catchments remains a challenge despite numerous attempts in the past. The well-known solution to this challenge is transfer of information from gauged catchments to ‘hydrologically-similar’ ungauged catchments, an approach known as ‘regionalization.’ The basis of regionalization is, thus, classification of catchments into hydrologically-similar groups. A major limitation of the traditional classification methods, such as the K-means clustering algorithm, is that they are not very suitable when the classes are not well separated from each other. Additionally, they cannot determine the number of classes in a dataset automatically. To overcome these limitations, some recent studies have used complex networks-based classification algorithms, widely known as community structure algorithms, for catchment classification. However, such studies have applied the community structure algorithms only to time series of hydrological variables (e.g. streamflow) and have not so far used lumped information (e.g. mean rainfall and mean slope). In this short communication, we propose a Canberra distance-based metric that can enable a community structure algorithm to exploit lumped information. For demonstration, the proposed metric is used to compute link weights for the multilevel modularity optimization algorithm. The proposed classification method is applied to lumped data from 494 basins situated in the CONtiguous United States (CONUS) for their classification, and its performance is compared with that of the K-means clustering algorithm. By and large, the proposed classification framework opens up an alternative avenue towards prediction in ungauged catchments.
Journal Article
Herb Leaves Recognition using Gray Level Co-occurrence Matrix and Five Distance-based Similarity Measures
by
Riyadi, Munawar Agus
,
Awaj, Muhammad Fahmi
,
Isnanto, R. Rizal
in
Chebyshev approximation
,
Feature extraction
,
Herbs
2018
Herb medicinal products derived from plants have long been considered as an alternative option for treating various diseases. In this paper, the feature extraction method used is Gray Level Co-occurrence Matrix (GLCM), while for its recognition using the metric calculations of Chebyshev, Cityblock, Minkowski, Canberra, and Euclidean distances. The method of determining the GLCM Analysis based on the texture analysis resulting from the extraction of this feature is Angular Second Moment, Contrast, Inverse Different Moment, Entropy as well as its Correlation. The recognition system used 10 leaf test images with GLCM method and Canberra distance resulted in the highest accuracy of 92.00%. While the use of 20 and 30 test data resulted in a recognition rate of 50.67% and 60.00%.
Journal Article
Ranking the Scientific Output of Researchers in Fractional Calculus
2019
This paper analyses the citation profiles (CP) of 130 researchers in fractional calculus. In a first phase, the Canberra distance is used to measure the similarities between the researchers’ CP, and the multidimensional scaling technique (MDS) is adopted for processing and visualizing the information. In a second phase, the gamma probability distribution is used to fit the normalized CP and the gamma parameters are used to characterize the researchers. The MDS results and the gamma distribution parameters are represented graphically in 2- and 3-dimensional locus depicting the relative positions of the researchers.
Journal Article
Model framework to construct a single aggregate sustainability indicator: an application to the biodiesel supply chain
2015
In the present work, we propose a model framework to select a set of sustainability indicators that provides reliable information on the system and use the results to analyze the suitability of four different metrics to describe the sustainability in a given context. We consider an approach that may be applied to study sustainability of a variety of systems and to aggregate 3D indicators into a single metric. Firstly, we identify an initial set of indicators that provides an adequate description of the sustainability conditions of a particular system and satisfy some criteria well established in the literature. Then, we use statistical tools to group the indicators into a valid set, according to their similarity using the inherent statistical information on their structure. This procedure simplifies the analyses of the complex system resulting in an optimum subset of indicators, reducing the dimension and improving the quality of the indicators. Once selected the indicators, established rules are used to aggregate commensurable indicators in a methodological manner into a single aggregate indicator. There is no generally accepted standard methodology to aggregate indicators into a single sustainability indicator. In general, the choice of a metric depends on the problem and on the units expressing the indicators. In the present work, this is analyzed studying four different metrics: Euclidean, Mahalanobis, Canberra, and
z
-score-normalized Canberra distances. This model framework is then applied to analyze a specific sustainability dimension of a biofuel supply chain in six countries, and compare and discuss the results obtained with the four metrics. It was found that among the four metrics, Canberra distance and Mahalanobis distance are the most adequate single aggregate metrics to describe the sustainability biodiesel chain in countries.
Journal Article