共查询到20条相似文献,搜索用时 9 毫秒
1.
Mangena Venu Madhavan Dang Ngoc Hoang Thanh Aditya Khamparia Sagar Pande Rahul Malik Deepak Gupta 《计算机、材料和连续体(英文)》2021,66(3):2939-2955
Disease recognition in plants is one of the essential problems in agricultural image processing. This article focuses on designing a framework that can recognize and classify diseases on pomegranate plants exactly. The framework utilizes image processing techniques such as image acquisition, image resizing, image enhancement, image segmentation, ROI extraction (region of interest), and feature extraction. An image dataset related to pomegranate leaf disease is utilized to implement the framework, divided into a training set and a test set. In the implementation process, techniques such as image enhancement and image segmentation are primarily used for identifying ROI and features. An image classification will then be implemented by combining a supervised learning model with a support vector machine. The proposed framework is developed based on MATLAB with a graphical user interface. According to the experimental results, the proposed framework can achieve 98.39% accuracy for classifying diseased and healthy leaves. Moreover, the framework can achieve an accuracy of 98.07% for classifying diseases on pomegranate leaves. 相似文献
2.
Syed Muhammad Saqlain Shah Tahir Afzal Malik Robina khatoon Syed Saqlain Hassan Faiz Ali Shah 《计算机、材料和连续体(英文)》2019,61(2):535-553
Classification of human actions under video surveillance is gaining a lot of attention from computer vision researchers. In this paper, we have presented methodology to recognize human behavior in thin crowd which may be very helpful in surveillance. Research have mostly focused the problem of human detection in thin crowd, overall behavior of the crowd and actions of individuals in video sequences. Vision based Human behavior modeling is a complex task as it involves human detection, tracking, classifying normal and abnormal behavior. The proposed methodology takes input video and applies Gaussian based segmentation technique followed by post processing through presenting hole filling algorithm i.e., fill hole inside objects algorithm. Human detection is performed by presenting human detection algorithm and then geometrical features from human skeleton are extracted using feature extraction algorithm. The classification task is achieved using binary and multi class support vector machines. The proposed technique is validated through accuracy, precision, recall and F-measure metrics. 相似文献
3.
Amin Bemani Alireza Baghban Shahaboddin Shamshirband Amir Mosavi Peter Csiba Annamaria R. Varkonyi-Koczy 《计算机、材料和连续体(英文)》2020,63(3):1175-1204
In the present work, a novel machine learning computational investigation is carried out to accurately predict the solubility of different acids in supercritical carbon dioxide. Four different machine learning algorithms of radial basis function, multi-layer perceptron (MLP), artificial neural networks (ANN), least squares support vector machine (LSSVM) and adaptive neuro-fuzzy inference system (ANFIS) are used to model the solubility of different acids in carbon dioxide based on the temperature, pressure, hydrogen number, carbon number, molecular weight, and the dissociation constant of acid. To evaluate the proposed models, different graphical and statistical analyses, along with novel sensitivity analysis, are carried out. The present study proposes an efficient tool for acid solubility estimation in supercritical carbon dioxide, which can be highly beneficial for engineers and chemists to predict operational conditions in industries. 相似文献
4.
Visvasam Devadoss Ambeth Kumar Chetan Swarup Indhumathi Murugan Abhishek Kumar Kamred Udham Singh Teekam Singh Ramu Dubey 《计算机、材料和连续体(英文)》2022,71(1):855-869
Cardio Vascular disease (CVD), involving the heart and blood vessels is one of the most leading causes of death throughout the world. There are several risk factors for causing heart diseases like sedentary lifestyle, unhealthy diet, obesity, diabetes, hypertension, smoking and consumption of alcohol, stress, hereditary factory etc. Predicting cardiovascular disease and improving and treating the risk factors at an early stage are of paramount importance to save the precious life of a human being. At present, the highly stressful life with bad lifestyle activities causes heart disease at a very young age. The main aim of this research is to predict the premature heart disease based on machine learning algorithms. This paper deals with a novel approach using the machine learning algorithm for predicting the cardiovascular disease at the premature stage itself. Support Vector Machine (SVM) is used for segregating the CVD patients based on their symptoms and medical observation. The experimentation results by using the proposed method will facilitate the medical practitioners to provide suitable treatment for the patients on time. A sophisticated model has been developed with the current approach to examine the various stages of CVD and the performance metrics used have given effective and fruitful results as compared to other machine learning techniques. 相似文献
5.
现行各种开采地面沉陷预测方法均存在着一个共同的缺陷,均不能在集成以往开采地面沉陷工程实
例的基础上对某一地下采矿工程所引起的地面沉陷进行预测,而只能根据某种物理的或力学的方法对其进行预
测。人类在工程实践中所创造的开采地面沉陷方面的经验是非常宝贵的财富,应当在建立开采地面沉陷预测方
法时加以充分利用。以所收集的开采地面沉陷工程实例为基础现行各种开采地面沉陷预测方法均存在着一个共同的缺陷,均不能在集成以往开采地面沉陷工程实
例的基础上对某一地下采矿工程所引起的地面沉陷进行预测,而只能根据某种物理的或力学的 相似文献
6.
A. Jayachandran R. Dhanasekaran 《International journal of imaging systems and technology》2014,24(1):72-82
Magnetic resonance image (MRI) segmentation refers to a process of assigning labels to set of pixels or multiple regions. It plays a major role in the field of biomedical applications as it is widely used by the radiologists to segment the medical images input into meaningful regions. In recent years, various brain tumor detection techniques are presented in the literature. In this article, we have developed an approach to brain tumor detection and severity analysis is done using the various measures. The proposed approach comprises of preprocessing, segmentation, feature extraction, and classification. In preprocessing steps, we need to perform skull stripping and then, anisotropic filtering is applied to make image suitable for extracting features. In feature extraction, we have modified the multi‐texton histogram (MTH) technique to improve the feature extraction. In the classification stage, the hybrid kernel is designed and applied to training of support vector machine to perform automatic detection of tumor region in MRI images. For comparison analysis, our proposed approach is compared with the existing works using K‐cross fold validation method. From the results, we can conclude that the modified multi‐texton histogram with non‐linear kernels has shown the accuracy of 86% but the MTH with non‐linear kernels shows the accuracy of 83.8%. 相似文献
7.
Philip J. Hepworth Alexey V. Nefedov Ilya B. Muchnik Kenton L. Morgan 《Journal of the Royal Society Interface》2012,9(73):1934-1942
Machine-learning algorithms pervade our daily lives. In epidemiology, supervised machine learning has the potential for classification, diagnosis and risk factor identification. Here, we report the use of support vector machine learning to identify the features associated with hock burn on commercial broiler farms, using routinely collected farm management data. These data lend themselves to analysis using machine-learning techniques. Hock burn, dermatitis of the skin over the hock, is an important indicator of broiler health and welfare. Remarkably, this classifier can predict the occurrence of high hock burn prevalence with accuracy of 0.78 on unseen data, as measured by the area under the receiver operating characteristic curve. We also compare the results with those obtained by standard multi-variable logistic regression and suggest that this technique provides new insights into the data. This novel application of a machine-learning algorithm, embedded in poultry management systems could offer significant improvements in broiler health and welfare worldwide. 相似文献
8.
Traffic congestion is a critical problem which makes roads busy. Traffic congestion challenges traffic flow in urban areas. A growing urban area creates complex traffic problems in daily life. Congestion phenomena cannot be resolved only by applying physical constructs such as building bridges and motorways and increasing road capacity. It is necessary to build technological systems for transportation management to control the traffic phenomenon. In this article, a new idea is proposed to tackle traffic congestion with the aid of machine learning approaches. A new strategy based on a tree-like configuration (i.e. a decision-making model) is suggested to handle traffic congestion at intersections using adaptive traffic signals. Different traffic networks with different sizes, varying from nine to 400 intersections, are examined. Numerical results and discussion are presented to prove the efficiency and application of the proposed strategy to alleviate traffic congestion. 相似文献
9.
Global positioning system (GPS) has been extensively used for land vehicle navigation systems. However, GPS is incapable of providing permanent and reliable navigation solutions in the presence of signal evaporation or blockage. On the other hand, navigation systems, in particular, inertial navigation systems (INSs), have become important components in different military and civil applications due to the recent advent of micro-electro-mechanical systems (MEMS). Both INS and GPS systems are often paired together to provide a reliable navigation solution by integrating the long-term GPS accuracy with the short-term INS accuracy. This article presents an alternative method to integrate GPS and INS systems and provide a robust navigation solution. This alternative approach to Kalman filtering (KF) utilizes artificial intelligence based on adaptive neuro-fuzzy inference system (ANFIS) to fuse data from both systems and estimate position and velocity errors. The KF is usually criticized for working only under predefined models and for its observability problem of hidden state variables, sensor error models, immunity to noise, sensor dependency, and linearization dependency. The training and updating of ANFIS parameters is one of the main problems. Therefore, the challenges encountered implementing an ANFIS module in real time have been overcome using particle swarm optimization (PSO) to optimize the ANFIS learning parameters since PSO involves less complexity and has fast convergence. The proposed alternative method uses GPS with INS data and PSO to update the intelligent PANFIS navigator using GPS/INS error as a fitness function to be minimized. Three methods of optimization have been tested and compared to estimate the INS error. Finally, the performance of the proposed alternative method has been examined using real field test data of MEMS grade INS integrated with GPS for different GPS outage periods. The results obtained outperform KF, particularly during long GPS signal blockage. 相似文献
10.
Wireless capsule endoscopy (WCE) is a recently established imaging technology that requires no wired device intrusion and
can be used to examine the entire small intestine non-invasively. Determining bleeding signs out of over 55,000 WCE images
is a tedious and expensive job by human reviewing. Our goal is to develop an automatic obscure bleeding detection method by
employing image color features and support vector machine (SVM) classifier. The bleeding lesion detection problem is a binary
classification problem. We use SVMs for this problem and a new feature selection procedure is proposed. Our experiments show
that SVM can be very efficient in processing unseen instances and may yield very high accuracy rate, in particular with our
new proposed feature selection. More specifically, for this bleeding detection problem, training an SVM with 640 samples can
be completed in as little as 0.01 second on a Dell workstation with dual Xeon CPUs, and classifying an image using the trained
SVM can be done in as little as 0.03 milliseconds. The accuracy for both sensitivity and specificity can be over 99%.
This work was partially supported by National Science Foundation grant IIS-0722106, IIS-0737861, and Texas ARP 003594-0020-2007. 相似文献
11.
This paper investigates performance improvement via the incorporation of the support vector machine (SVM) into the vector tracking loop (VTL) for the Global Positioning System (GPS) in limited satellite visibility. Unlike the traditional scalar tracking loop (STL), the tracking and navigation modules in the VTL are not independent anymore since the user’s position can be determined by using the information from other satellites and can be predicted on the basis of the states of the user. The method proposed in this paper makes use of the SVM to bridge the GPS signal and prevent the error growth due to signal outage. Similar to the neural network, the SVM is motivated by its ability to approximate an unknown nonlinear input-output mapping through supervised training. The SVM is employed for predicting adequate numerical control oscillator (NCO) inputs, i.e., providing better prediction of residuals for the Doppler frequency and code phase in order to maintain regular operation of the navigation system. When the navigation processing is in good condition, the SVM is at the training stage, and the output information from the discriminator and navigation filter is adopted as the inputs. Other machine learning (ML) algorithms such as the radial basis function neural network (RBFNN) and the Adaptive Network-Based Fuzzy Inference System (ANFIS) are employed for comparison. Performance evaluation for the SVM assisted architecture as compared to the RBFNN- and ANFIS-assisted methods and the un-assisted VTL will be carried out and the performance evaluation during GPS signal outage will be presented. The proposed design is very useful for navigation during the environment of limited satellite visibility to effectively overcome the problem in the environment of GPS outage. 相似文献
12.
磁流变阻尼器的模糊逼近 总被引:1,自引:0,他引:1
由于磁流变液具有非线性特性,所以磁流变阻尼器的输入输出问具有很强的非线性关系。可准确描述其非线性特性的磁流变阻尼器正模型通常非常复杂,难以直接得到逆模型。考虑到某些模糊系统的万能逼近能力,本文提出用模糊系统来逼近磁流变阻尼器逆模型的新思路。根据自适应神经模糊推理系统原理,设计两个模糊系统分别逼近磁流变阻尼器的正模型和逆模型。研究结果表明:无论是正模型还是逆模型。对于训练数据,模糊系统均可以准确逼近,而对于检验数据也可比较准确逼近。正模型的逼近效果稍好,若要提高逆模型ANFIS的逼近精度.将以增加系统复杂性为代价。模糊逼近可以推广到其它的磁流变阻尼器模型中,特别是可对正模型未知的磁流变阻尼器进行建模与控制。 相似文献
13.
目的为解决现有制丝评价系统粗放,只注重质量结果的评价,忽略控制过程本身的问题,建立适应当前工艺现状和过程控制数据分布特点的综合评价与管控方法。方法通过在工段、工序、工艺参数多层级间构建科学的评价结构,采用层次分析法计算各层级间指标权重,基于模糊算法建立百分制质量指数表征函数,最终通过批次综合得分Sbatch模型进行工艺质量评估。结果新构建的评价模型精准科学地评估了批次全工序过程控制水平,根据综合得分,可以实时追溯批次弱项指标并改进,批次优秀率(批次综合得分大于95分)达91.2%。结论构建了集约的制丝评价体系,从工艺参数到工序深入挖掘分析生产过程控制情况,实现了由结果评价向过程评价的转变,给生产操作工和工艺管理员提供实时借鉴,不断提高过程控制水平。 相似文献
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传统的分类方法仅仅基于像素光谱特征,不适合于高分辨率遥感影像.本文提出了一种新的基于商空间理论,面向对象的高分辨率遥感影像分类方法,即综合云模型、模糊支持向量机和决策树的分层合成分类技术.针对决定分类效果的两个因素,影像分割和分类算法,分别做出了一些改进.第一,本文提出了一个自适应的基于云模型的区域增长分割策略.第二,... 相似文献
17.
基于多超平面支持向量机的图像语义分类算法 总被引:1,自引:0,他引:1
由于图像的低层可视特征与高层语义内容之间存在巨大的语义鸿沟,而基于内容的图像分类和检索准确性极大依赖低层可视特征的描述,本文提出了一种基于多超平面支持向量机的图像语义分类方法.多超平面分类器从优化问题的复杂度和运行泛化能力两方面进行研究,是最优分离超平面分类器一种显而易见的扩展.实验结果表明,本文提出的方法在图像语义分类的准确性方面要优于诸如采用色彩特征和纹理特征的支持向量机分类器的其它方法. 相似文献
18.
支持向量机及其在机械故障诊断中的应用 总被引:4,自引:6,他引:4
支持向量机(SVM)是一种基于统计学习理论的新型机器学习方法,对小样本决策具有较好的学习推广性。对近年来支持向量机的研究进展及其在故障诊断中的应用做了简要介绍,讨论了支持向量机的特点和存在的问题,展望了其在机械故障诊断的研究前景。 相似文献
19.
针对复杂颜色和纹理特征条件下,多晶硅电池片上的色差检测问题,提出了一种基于支持向量机分类策略的多晶硅电池片色差检测方法。首先对预处理后电池片图像进行颜色模型转换和通道分离,利用Otsu方法对单通道图像进行阈值分割处理,并计算各阈值图像的区域对比度,然后根据区域对比度情况选择合适的阈值图像,利用阈值图像所提供的信息提取图像特征;最后使用支持向量机分类器来判别电池片是否存在色差缺陷。实验结果表明提出的色差检测算法可以实现多晶硅电池片色差高效检测,色差缺陷检测的准确度、误检率和检测时间分别达到96.88%, 5%和109ms。 相似文献
20.
Xiangchun Liu Jing Yu Wei Song Xinping Zhang Lizhi Zhao Antai Wang 《计算机、材料和连续体(英文)》2020,65(2):1385-1395
With the development of satellite technology, the satellite imagery of the earth’s surface and the whole surface makes it possible to survey surface resources and master the dynamic changes of the earth with high efficiency and low consumption. As an important tool for satellite remote sensing image processing, remote sensing image classification has become a hot topic. According to the natural texture characteristics of remote sensing images, this paper combines different texture features with the Extreme Learning Machine, and proposes a new remote sensing image classification algorithm. The experimental tests are carried out through the standard test dataset SAT-4 and SAT-6. Our results show that the proposed method is a simpler and more efficient remote sensing image classification algorithm. It also achieves 99.434% recognition accuracy on SAT-4, which is 1.5% higher than the 97.95% accuracy achieved by DeepSat. At the same time, the recognition accuracy of SAT-6 reaches 99.5728%, which is 5.6% higher than DeepSat’s 93.9%. 相似文献