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JPEG2000-Based Semantic Image Compression using CNN 基于CNN的jpeg2000语义图像压缩
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.4
Anish Nagarsenker, P. Khandekar, Minal Deshmukh
Some of the computer vision applications such as understanding, recognition as well as image processing are some areas where AI techniques like convolutional neural network (CNN) have attained great success. AI techniques are not very frequently used in applications like image compression which are a part of low-level vision applications. Intensifying the visual quality of the lossy video/image compression has been a huge obstacle for a very long time. Image processing tasks and image recognition can be addressed with the application of deep learning CNNs as a result of the availability of large training datasets and the recent advances in computing power. This paper consists of a CNN-based novel compression framework comprising of Compact CNN (ComCNN) and Reconstruction CNN (RecCNN) where they are trained concurrently and ideally consolidated into a compression framework, along with MS-ROI (Multi Structure-Region of Interest) mapping which highlights the semiotically notable portions of the image. The framework attains a mean PSNR value of 32.9dB, achieving a gain of 3.52dB and attains mean SSIM value of 0.9262, achieving a gain of 0.0723dB over the other methods when compared using the 6 main test images. Experimental results in the proposed study validate that the architecture substantially surpasses image compression frameworks, that utilized deblocking or denoising post- processing techniques, classified utilizing Peak Signal to Noise Ratio (PSNR) and Structural Similarity Index Measures (SSIM) with a mean PSNR, SSIM and Compression Ratio of 38.45, 0.9602 and 1.75x respectively for the 50 test images, thus obtaining state-of-art performance for Quality Factor (QF)=5.
一些计算机视觉应用,如理解、识别以及图像处理,是卷积神经网络(CNN)等人工智能技术取得巨大成功的一些领域。人工智能技术并不经常用于像图像压缩这样的应用程序,这是低级视觉应用程序的一部分。长期以来,增强有损视频/图像压缩的视觉质量一直是一个巨大的障碍。由于大型训练数据集的可用性和计算能力的最新进步,深度学习cnn的应用可以解决图像处理任务和图像识别问题。本文由一个基于CNN的新型压缩框架组成,该框架包括紧凑CNN (ComCNN)和重建CNN (RecCNN),它们同时被训练并理想地整合到一个压缩框架中,以及MS-ROI(多结构感兴趣区域)映射,该映射突出了图像的符号显著部分。该框架的平均PSNR值为32.9dB,增益为3.52dB,平均SSIM值为0.9262,与其他方法相比,使用6个主要测试图像进行比较,增益为0.0723dB。本研究的实验结果表明,该架构大大优于图像压缩框架,该框架利用去块或去噪后处理技术,利用峰值信噪比(PSNR)和结构相似度指标(SSIM)对50幅测试图像进行分类,平均PSNR、SSIM和压缩比分别为38.45倍、0.9602倍和1.75倍,在质量因子(QF)=5时获得了最先进的性能。
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引用次数: 0
Noise Effects on a Proposed Algorithm for Signal Reconstruction and Bandwidth Optimization 噪声对信号重构和带宽优化算法的影响
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.2
Ahmed F. Ashour, Ashraf A. M. Khalaf, Aziza I. Hussein, Hesham F. A. Hamed, A. Ramadan
The development of wireless technology in recent years has increased the demand for channel resources within a limited spectrum. The system's performance can be improved through bandwidth optimization, as the spectrum is a scarce resource. To reconstruct the signal, given incomplete knowledge about the original signal, signal reconstruction algorithms are needed. In this paper, we propose a new scheme for reducing the effect of adding additive white Gaussian noise (AWGN) using a noise reject filter (NRF) on a previously discussed algorithm for baseband signal transmission and reconstruction that can reconstruct most of the signal’s energy without any need to send most of the signal’s concentrated power like the conventional methods, thus achieving bandwidth optimization. The proposed scheme for noise reduction was tested for a pulse signal and stream of pulses with different rates (2, 4, 6, and 8 Mbps) and showed good reconstruction performance in terms of the normalized mean squared error (NMSE) and achieved an average enhancement of around 48%. The proposed schemes for signal reconstruction and noise reduction can be applied to different applications, such as ultra-wideband (UWB) communications, radio frequency identification (RFID) systems, mobile communication networks, and radar systems.
近年来无线技术的发展增加了对有限频谱内信道资源的需求。由于频谱是一种稀缺资源,因此可以通过带宽优化来提高系统的性能。为了重建信号,在对原始信号不完全了解的情况下,需要使用信号重建算法。在本文中,我们提出了一种利用噪声抑制滤波器(NRF)降低加性高斯白噪声(AWGN)对先前讨论的基带信号传输和重构算法的影响的新方案,该方案可以重构信号的大部分能量,而无需像传统方法那样发送信号的大部分集中功率,从而实现带宽优化。对不同速率(2、4、6和8 Mbps)的脉冲信号和脉冲流进行了降噪测试,显示出良好的归一化均方误差(NMSE)重建性能,平均增强幅度约为48%。建议的讯号重建及降噪方案可应用于不同的应用,例如超宽频通讯、无线射频识别系统、流动通讯网络及雷达系统。
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引用次数: 0
Development of a Control Strategy for the Hybrid Energy Storage Systems in Standalone Microgrid 独立微电网混合储能系统控制策略的开发
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.9
H. Guentri, A. Dahbi, T. Allaoui, S. Aoulmit, A. Bouraiou
The intermediate energy storage system is very necessary for the standalone multi-source renewable energy system to increase stability, reliability of supply, and power quality. Among the most practical energy storage solutions is combining supercapacitors and chemical batteries. However, the major problem in this kind of application is the design of the power management, as well as the control scheme of hybrid energy storage systems. The focal purpose of this paper is to develop a novel approach to control DC bus voltage based on the reference power's frequency decomposition. This paper uses a storage system combined of batteries and supercapacitors. These later are integrated in the multi-source renewable energy system to supply an AC load. This technique uses the low-pass filters' properties to control the DC bus voltage by balancing the generated green power and the fluctuating load. The hybrid storage system regulates power fluctuations by absorbing surplus power and providing required power. The results show good performances of the proposed control scheme, such as low battery current charge/discharge rates, lower current stress level on batteries, voltage control improvements, which lead to increase the battery life.
中间储能系统对于独立的多源可再生能源系统来说是非常必要的,以提高供应的稳定性、可靠性和电能质量。最实用的储能解决方案之一是将超级电容器和化学电池相结合。然而,这种应用中的主要问题是电源管理的设计,以及混合储能系统的控制方案。本文的主要目的是开发一种基于参考功率频率分解的直流母线电压控制新方法。本文采用了一种电池和超级电容器相结合的存储系统。这些随后被集成在多源可再生能源系统中,以提供AC负载。该技术利用低通滤波器的特性,通过平衡产生的绿色电力和波动的负载来控制直流母线电压。混合存储系统通过吸收剩余功率并提供所需功率来调节功率波动。结果表明,所提出的控制方案具有良好的性能,如低电池电流充电/放电率、较低的电池电流应力水平、电压控制的改进,从而延长了电池寿命。
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引用次数: 0
Real-World Anomaly Detection in Video Using Spatio-Temporal Features Analysis for Weakly Labelled Data with Auto Label Generation 基于自动标签生成的弱标记数据时空特征分析的视频真实世界异常检测
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.8
Rikin J. Nayak, Jitendra P. Chaudhari
Detecting anomalies in videos is a complex task due to diverse content, noisy labeling, and a lack of frame-level labeling. To address these challenges in weakly labeled datasets, we propose a novel custom loss function in conjunction with the multi-instance learning (MIL) algorithm. Our approach utilizes the UCF Crime and ShanghaiTech datasets for anomaly detection. The UCF Crime dataset includes labeled videos depicting a range of incidents such as explosions, assaults, and burglaries, while the ShanghaiTech dataset is one of the largest anomaly datasets, with over 400 video clips featuring three different scenes and 130 abnormal events. We generated pseudo labels for videos using the MIL technique to detect frame-level anomalies from video-level annotations, and to train the network to distinguish between normal and abnormal classes. We conducted extensive experiments on the UCF Crime dataset using C3D and I3D features to test our model's performance. For the ShanghaiTech dataset, we used I3D features for training and testing. Our results show that with I3D features, we achieve an 84.6% frame-level AUC score for the UCF Crime dataset and a 92.27% frame-level AUC score for the ShanghaiTech dataset, which are comparable to other methods used for similar datasets.
检测视频中的异常是一项复杂的任务,因为内容多样,有噪声标记,缺乏帧级标记。为了解决弱标记数据集中的这些挑战,我们提出了一种结合多实例学习(MIL)算法的新型自定义损失函数。我们的方法利用UCF Crime和ShanghaiTech数据集进行异常检测。UCF犯罪数据集包括描述爆炸、袭击和入室盗窃等一系列事件的标记视频,而上海科技数据集是最大的异常数据集之一,拥有超过400个视频片段,其中包含三个不同的场景和130个异常事件。我们使用MIL技术为视频生成伪标签,从视频级注释中检测帧级异常,并训练网络区分正常和异常类。我们在UCF犯罪数据集上进行了广泛的实验,使用C3D和I3D特征来测试我们的模型的性能。对于ShanghaiTech数据集,我们使用I3D特征进行训练和测试。我们的研究结果表明,使用I3D特征,我们为UCF犯罪数据集实现了84.6%的帧级AUC得分,为上海科技数据集实现了92.27%的帧级AUC得分,这与用于类似数据集的其他方法相当。
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引用次数: 0
Lucy Richardson and Mean Modified Wiener Filter for Construction of Super-Resolution Image Lucy Richardson和均值修正维纳滤波器在超分辨率图像构建中的应用
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.3
Pravin Balaso Chopade, Prabhakar N. Kota, Bhagvat D. Jadhav, Pravin Marotrao Ghate, Shankar Dattatray Chavan
The ultimate goal of the Super-Resolution (SR) technique is to generate the High-Resolution (HR) image by combining the corresponding images with Low-Resolution (LR), which is utilized for different applications such as surveillance, remote sensing, medical diagnosis, etc. The original HR image may be corrupted due to various causes such as warping, blurring, and noise addition. SR image reconstruction methods are frequently plagued by obtrusive restorative artifacts such as noise, stair casing effect, and blurring. Thus, striking a balance between smoothness and edge retention is never easy. By enhancing the visual information and autonomous machine perception, this work presented research to improve the effectiveness of SR image reconstruction The reference image is obtained from DIV2K and BSD 100 dataset, these reference LR image is converted as composed LR image using the proposed Lucy Richardson and Modified Mean Wiener (LR-MMWF) Filters. The possessed LR image is provided as input for the stage of bicubic interpolation. Afterward, the initial HR image is obtained as output from the interpolation stage which is given as input for the SR model consisting of fidelity term to decrease residual between the projected HR image and detected LR image. At last, a model based on Bilateral Total Variation (BTV) prior is utilized to improve the stability of the HR image by refining the quality of the image. The results obtained from the performance analysis show that the proposed LR-MMW filter attained better PSNR and Structural Similarity (SSIM) than the existing filters. The results obtained from the experiments show that the proposed LR-MMW filter achieved better performance and provides a higher PSNR value of 31.65dB whereas the Filter-Net and 1D,2D CNN filter achieved PSNR values of 28.95dB and 31.63dB respectively.
超分辨率(Super-Resolution, SR)技术的最终目标是将相应图像与低分辨率(Low-Resolution, LR)相结合,生成高分辨率(High-Resolution, HR)图像,用于监控、遥感、医疗诊断等不同应用。原始HR图像可能由于各种原因而损坏,例如扭曲,模糊和噪声添加。SR图像重建方法经常受到诸如噪声、阶梯效应和模糊等突发性修复伪影的困扰。因此,在平滑和边缘保持之间取得平衡从来都不是一件容易的事。从DIV2K和BSD 100数据集中获取参考图像,使用提出的Lucy Richardson和改进的均值维纳(LR- mmwf)滤波器将参考LR图像转换为合成LR图像。得到的LR图像作为双三次插值阶段的输入。然后,从插值阶段获得初始HR图像作为输出,将其作为SR模型的输入,该模型由保真度项组成,以减小投影HR图像与检测到的LR图像之间的残差。最后,利用基于双边总变差(BTV)先验的模型,通过对图像质量进行细化,提高HR图像的稳定性。性能分析结果表明,所提出的LR-MMW滤波器比现有滤波器具有更好的PSNR和结构相似度(SSIM)。实验结果表明,本文提出的LR-MMW滤波器性能更好,PSNR值为31.65dB,而filter - net和1D、2D CNN滤波器的PSNR值分别为28.95dB和31.63dB。
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引用次数: 0
Design and Simulation of Microstrip Antenna Array Operating at S-band for Wireless Communication System 无线通信系统s波段微带天线阵列的设计与仿真
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.1
Sattar Othman Hasan, Saman Khabbat Ezzulddin, Rashad Hassan Mahmud, Mowfaq Jalil Ahmed
In this article, different design configurations of rectangular microstrip patch antenna (RMSA) array operating at S-band frequency are presented. The substrate material utilized in the designs is Rogers-RT-5800 with dielectric permittivity (Ԑr= 2.2), thickness of (h=1.6 mm), and loss tangent of (δ = 0.009). The performances of a single element, (1×2), (2×2) and (1×4) array elements operating at (3.6 GHz) are investigated using the CST and HFSS numerical techniques. The simulation results indicates that the antenna gain of (8.68, 10.35, 10.43 and 10.52) dB, VSWR (1.045, 1.325, 1.095 and 1.945), return loss (-34.91, -17.15, -27.42 and -12.26) dB, and bandwidth (85.00, 200.00, 215 and 106.4) MHz are achieved with the implementation of HFSS for advanced single element, (1×2), (2×2) and (1×4) array elements, respectively. Besides, the corresponding antenna parameter values provided by CST are, gain (7.36, 9.8, 9.87 and 10.30) dB, VSWR (1.011, 1.304, 1.305 and 1.579), return loss (-44.97, -17.58, -17.55 and -14.01) dB, and bandwidth (92.28, 204, 229.49 and 129.12) MHz, respectively. The results also reveals that the higher gain and wider bandwidth are, respectively, achieved with (1×4) and (2×2) array configuration arrangement and with both simulation techniques. Additionally, a good agreement and an advancement between the obtained results with the ones previously studied for the same array types operating at S-band frequencies are also observed.
本文介绍了工作在s波段的矩形微带贴片天线(RMSA)阵列的不同设计结构。衬底材料为Rogers-RT-5800,介电常数(Ԑr= 2.2),厚度(h=1.6 mm),损耗正切(δ = 0.009)。利用CST和HFSS数值技术研究了(3.6 GHz)单元(1×2)、(2×2)和(1×4)阵列元的性能。仿真结果表明,在先进单元(1×2)、(2×2)和(1×4)阵列单元上实现HFSS后,天线增益分别为(8.68、10.35、10.43和10.52)dB,驻波比分别为(1.045、1.325、1.095和1.945),回波损耗分别为(-34.91、-17.15、-27.42和-12.26)dB,带宽分别为(85.00、200.00、215和106.4)MHz。CST提供的天线参数值分别为:增益(7.36、9.8、9.87、10.30)dB,驻波比(1.011、1.304、1.305、1.579),回波损耗(-44.97、-17.58、-17.55、-14.01)dB,带宽(92.28、204、229.49、129.12)MHz。结果还表明,(1×4)和(2×2)阵列配置和两种仿真技术分别获得了更高的增益和更宽的带宽。此外,所得到的结果与先前在s波段工作的相同阵列类型的研究结果也有很好的一致性和先进性。
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引用次数: 0
Performance Analysis of a new Filter and Wrapper Sequence for the Survivability Prediction of Breast Cancer Patients 一种新的滤波和包裹序列对乳腺癌患者生存能力预测的性能分析
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.6
E. J. Sweetlin, S. Saudia
Feature selection is an essential preprocessing step for removing redundant or irrelevant features from multidimensional data to improve predictive performance. Currently, medical clinical datasets are increasingly large and multidimensional and not every feature helps in the necessary predictions. So, feature selection techniques are used to determine relevant feature set that can improve the performance of a learning algorithm. This study presents a performance analysis of a new filter and wrapper sequence involving the intersection of filter methods, Mutual Information and Chi-Square followed by one of the wrapper methods: Sequential Forward Selection and Sequential Backward Selection to obtain a more informative feature set for improved prediction of the survivability of breast cancer patients from the clinical breast cancer dataset, SEER. The improvement in performance due to this filter and wrapper sequence in terms of Accuracy, False Positive Rate, False Negative Rate and Area under the Receiver Operating Characteristics curve is tested using the Machine learning algorithms: Logistic Regression, K-Nearest Neighbour, Decision Tree, Random Forest, Support Vector Machine and Multilayer Perceptron. The performance analysis supports the Sequential Backward Selection of the new filter and wrapper sequence over Sequential Forward Selection for the SEER dataset.
特征选择是从多维数据中去除冗余或不相关特征以提高预测性能的重要预处理步骤。目前,医学临床数据集越来越庞大和多维,并不是每个特征都有助于进行必要的预测。因此,使用特征选择技术来确定可以提高学习算法性能的相关特征集。本研究提出了一种新的滤波器和包装器序列的性能分析,该序列涉及滤波器方法的交集,Mutual Information和Chi-Square,然后是包装方法之一:顺序正向选择和顺序反向选择,从临床癌症数据集SEER中获得更具信息性的特征集,以改进对乳腺癌症患者生存能力的预测。使用机器学习算法:Logistic回归、K-Nearest Neighbour、决策树、随机森林、支持向量机和多层感知器,测试了该滤波器和包装序列在准确度、假阳性率、假阴性率和接收器工作特性曲线下面积方面的性能改进。性能分析支持SEER数据集的新过滤器和包装器序列的顺序向后选择,而不是顺序向前选择。
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引用次数: 0
A New Approach using Deep Learning and Reinforcement Learning in HealthCare 一种在医疗保健中使用深度学习和强化学习的新方法
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-06-05 DOI: 10.32985/ijeces.14.5.7
Dahdouh Yousra, Anouar Boudhir Abdelhakim, Ben Ahmed Mohamed
Nowadays, skin cancer is one of the most important problems faced by the world, due especially to the rapid development of skin cells and excessive exposure to UV rays. Therefore, early detection at an early stage employing advanced automated systems based on AI algorithms plays a major job in order to effectively identifying and detecting the disease, reducing patient health and financial burdens, and stopping its spread in the skin. In this context, several early skin cancer detection approaches and models have been presented throughout the last few decades to improve the rate of skin cancer detection using dermoscopic images. This work proposed a model that can help dermatologists to know and detect skin cancer in just a few seconds. This model combined the merits of two major artificial intelligence algorithms: Deep Learning and Reinforcement Learning following the great success we achieved in the classification and recognition of images and especially in the medical sector. This research included four main steps. Firstly, the pre-processing techniques were applied to improve the accuracy, quality, and consistency of a dataset. The input dermoscopic images were obtained from the HAM10000 database. Then, the watershed algorithm was used for the segmentation process performed to extract the affected area. After that, the deep convolutional neural network (CNN) was utilized to classify the skin cancer into seven types: actinic keratosis, basal cell carcinoma, benign keratosis, dermatofibroma melanocytic nevi, melanoma vascular skin lesions. Finally, in regards to the reinforcement learning part, the Deep Q_Learning algorithm was utilized to train and retrain our model until we found the best result. The accuracy metric was utilized to evaluate the efficacy and performance of the proposed method, which achieved a high accuracy of 80%. Furthermore, the experimental results demonstrate how reinforcement learning can be effectively combined with deep learning for skin cancer classification tasks.
皮肤癌症是当今世界面临的最重要的问题之一,尤其是由于皮肤细胞的快速发展和过度暴露于紫外线。因此,在早期阶段使用基于人工智能算法的先进自动化系统进行早期检测,在有效识别和检测疾病、减轻患者健康和经济负担以及阻止其在皮肤中传播方面发挥着重要作用。在这种情况下,在过去几十年中,已经提出了几种早期皮肤癌症检测方法和模型,以提高使用皮肤镜图像检测皮肤癌症的比率。这项工作提出了一个模型,可以帮助皮肤科医生在几秒钟内了解和检测皮肤癌症。该模型结合了两种主要人工智能算法的优点:深度学习和强化学习,此前我们在图像分类和识别方面取得了巨大成功,尤其是在医疗领域。这项研究包括四个主要步骤。首先,应用预处理技术来提高数据集的准确性、质量和一致性。输入的皮肤镜图像是从HAM10000数据库中获得的。然后,将分水岭算法用于分割过程,以提取受影响的区域。然后,利用深度卷积神经网络(CNN)将癌症分为光化性角化病、基底细胞癌、良性角化病,皮肤纤维瘤黑色素细胞痣、黑色素瘤血管性皮肤病变7种类型。最后,关于强化学习部分,使用Deep Q_learning算法对我们的模型进行训练和再训练,直到我们找到最佳结果。准确度指标用于评估所提出方法的有效性和性能,该方法实现了80%的高准确度。此外,实验结果证明了强化学习如何与深度学习有效结合用于皮肤癌症分类任务。
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引用次数: 0
Segmentation of Medical Images with Adaptable Multifunctional Discretization Bayesian Neural Networks and Gaussian Operation 基于自适应多功能离散贝叶斯神经网络和高斯算子的医学图像分割
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-04-26 DOI: 10.32985/ijeces.14.4.2
G. Ramalingam, Selvakumaran Selvaraj, Visumathi James, Senthil Kumar Saravanaperumal, Buvaneswari Mohanram
Bayesian statistics is incorporated into a neural network to create a Bayesian neural network (BNN) that adds posterior inference aims at preventing overfitting. BNNs are frequently used in medical image segmentation because they provide a stochastic viewpoint of segmentation approaches by producing a posterior probability with conventional limitations and allowing the depiction of uncertainty over following distributions. However, the actual efficacy of BNNs is constrained by the difficulty in selecting expressive discretization and accepting suitable following disseminations in a higher-order domain. Functional discretization BNN using Gaussian processes (GPs) that analyze medical image segmentation is proposed in this paper. Here, a discretization inference has been assumed in the functional domain by considering the former and dynamic consequent distributions to be GPs. An upsampling operator that utilizes a content-based feature extraction has been proposed. This is an adaptive method for extracting features after feature mapping is used in conjunction with the functional evidence lower bound and weights. This results in a loss-aware segmentation network that achieves an F1-score of 91.54%, accuracy of 90.24%, specificity of 88.54%, and precision of 80.24%.
将贝叶斯统计纳入神经网络以创建贝叶斯神经网络(BNN),该网络添加了旨在防止过拟合的后验推理。BNN经常用于医学图像分割,因为它们通过产生具有传统限制的后验概率并允许描述以下分布的不确定性,提供了分割方法的随机观点。然而,BNN的实际功效受到难以选择表达性离散化和在高阶域中接受合适的后续传播的限制。本文提出了一种利用高斯过程分析医学图像分割的函数离散化BNN。这里,通过将前者和动态结果分布考虑为GP,在函数域中假设了离散化推理。已经提出了一种利用基于内容的特征提取的上采样算子。这是一种在结合功能证据下界和权重使用特征映射后提取特征的自适应方法。这导致了损失感知分割网络,其F1得分为91.54%,准确率为90.24%,特异性为88.54%,准确度为80.24%。
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引用次数: 0
An Efficient Switch Migration Scheme for Load Balancing in Software Defined Networking 一种有效的软件定义网络负载均衡交换机迁移方案
IF 1.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2023-04-26 DOI: 10.32985/ijeces.14.4.8
Thangaraj Ethilu, Abirami Sathappan, P. Rodrigues
Software-defined networking (SDN) provides increased flexibility to network management through distributed SDN control, and it has been a great breakthrough in network innovation. Switch migration is extensively used for workload balancing among distributed controllers. The time-sharing switch migration (TSSM) scheme proposes a strategy in which more than one controller is allowed to share the workload of a switch via time sharing during overloaded conditions, resulting in the mitigation of ping-pong controller difficulty, a reduced number of overload occurrences, and better controller efficiency. However, it has increased migration costs and higher controller resource consumption during the TSSM operation period because it requires more than one controller to perform. Therefore, we have proposed a strategy that optimizes the controller selection during the TSSM period based on flow characteristics through a greedy set coverage algorithm. The improved TSSM scheme provides reduced migration costs and lower controller resource consumption, as well as TSSM benefits. For its feasibility, the implementation of the proposed scheme is accomplished through an open network operating system. The experimental results show that the proposed improved TSSM scheme reduces the migration cost and lowers the controller resource consumption by about 36% and 34%, respectively, as compared with the conventional TSSM scheme.
软件定义网络(SDN)通过分布式SDN控制,为网络管理提供了更大的灵活性,是网络创新的一大突破。交换机迁移广泛用于分布式控制器之间的工作负载均衡。TSSM (time-sharing switch migration)方案提出了一种在过载情况下允许多个控制器通过分时分担交换机工作负载的策略,从而缓解了乒乓控制器的困难,减少了过载的发生次数,提高了控制器的效率。但在TSSM运行期间,由于需要多个控制器同时运行,增加了迁移成本和控制器资源消耗。因此,我们提出了一种基于流量特性,通过贪婪集覆盖算法优化TSSM期间控制器选择的策略。改进的TSSM方案提供了更低的迁移成本和更低的控制器资源消耗,以及TSSM的优势。基于其可行性,本文提出的方案通过开放的网络操作系统来实现。实验结果表明,与传统的TSSM方案相比,改进的TSSM方案的迁移成本和控制器资源消耗分别降低了约36%和34%。
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引用次数: 1
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