共查询到20条相似文献，搜索用时 0 毫秒
1.
目的 针对人工分拣组成的零件包装盒常常会出现缺少部分零件的问题,开发一套集训练、识别、分选于一体的智能分拣系统.方法 在设计过程中,提出一种基于深度学习的改进Yolov3算法,针对工业现场光照、业零件形状和质地等实际因素,对Yolo算法的训练和检测进行改进,通过对包装盒产品的一次拍摄,检测出画面中出现的预设物体,并与标准设置相比对,从而判断出该盒内产品是否有缺料、多料的情况,以此分选出合格与否的包装盒.结果 在物体摆放相互重叠不超过20％的情况下,物体检测的准确率为98.2％,召回率为99.5％.结论 通过文中提出的改进算法,设计的检测系统能够在复杂的工业现场环境下正常工作,并能对包装的完整性进行准确的检测. 相似文献
2.
V. Praveena A. Vijayaraj P. Chinnasamy Ihsan Ali Roobaea Alroobaea Saleh Yahya Alyahyan Muhammad Ahsan Raza 《计算机、材料和连续体（英文）》2022,70(2):2639-2653
In recent years, progressive developments have been observed in recent technologies and the production cost has been continuously decreasing. In such scenario, Internet of Things (IoT) network which is comprised of a set of Unmanned Aerial Vehicles (UAV), has received more attention from civilian to military applications. But network security poses a serious challenge to UAV networks whereas the intrusion detection system (IDS) is found to be an effective process to secure the UAV networks. Classical IDSs are not adequate to handle the latest computer networks that possess maximum bandwidth and data traffic. In order to improve the detection performance and reduce the false alarms generated by IDS, several researchers have employed Machine Learning (ML) and Deep Learning (DL) algorithms to address the intrusion detection problem. In this view, the current research article presents a deep reinforcement learning technique, optimized by Black Widow Optimization (DRL-BWO) algorithm, for UAV networks. In addition, DRL involves an improved reinforcement learning-based Deep Belief Network (DBN) for intrusion detection. For parameter optimization of DRL technique, BWO algorithm is applied. It helps in improving the intrusion detection performance of UAV networks. An extensive set of experimental analysis was performed to highlight the supremacy of the proposed model. From the simulation values, it is evident that the proposed method is appropriate as it attained high precision, recall, F-measure, and accuracy values such as 0.985, 0.993, 0.988, and 0.989 respectively. 相似文献
3.
With the advancement of network communication technology, network traffic shows explosive growth. Consequently, network attacks occur frequently. Network intrusion detection systems are still the primary means of detecting attacks. However, two challenges continue to stymie the development of a viable network intrusion detection system: imbalanced training data and new undiscovered attacks. Therefore, this study proposes a unique deep learning-based intrusion detection method. We use two independent in-memory autoencoders trained on regular network traffic and attacks to capture the dynamic relationship between traffic features in the presence of unbalanced training data. Then the original data is fed into the triplet network by forming a triplet with the data reconstructed from the two encoders to train. Finally, the distance relationship between the triples determines whether the traffic is an attack. In addition, to improve the accuracy of detecting unknown attacks, this research proposes an improved triplet loss function that is used to pull the distances of the same class closer while pushing the distances belonging to different classes farther in the learned feature space. The proposed approach’s effectiveness, stability, and significance are evaluated against advanced models on the Android Adware and General Malware Dataset (AAGM17), Knowledge Discovery and Data Mining Cup 1999 (KDDCUP99), Canadian Institute for Cybersecurity Group’s Intrusion Detection Evaluation Dataset (CICIDS2017), UNSW-NB15, Network Security Lab-Knowledge Discovery and Data Mining (NSL-KDD) datasets. The achieved results confirmed the superiority of the proposed method for the task of network intrusion detection. 相似文献
4.
目的 解决定制化木门尺寸规格不统一、表面纹理多样而导致的堆垛分类困难、搬运效率低下等问题。方法 提出采用深度学习方法进行定制式木门工件检测,以YOLOV3网络为基本框架开展机器人工件识别方法研究。首先,通过图像数据增强和预处理,扩充定制式木门数据;然后,进行YOLO V3损失函数改进,并根据木门特征进行定制式木门数据集锚框尺度的重新聚类;最后,应用空间金字塔池化层进行YOLO V3中特征金字塔网络改进,并通过随机选取的测试集验证本文方法的有效性。结果 测试数据集的平均检测准确率均值达到98.05%,检测每张图片的时间为137 ms。结论 研究表明,本文方法能够满足木门生产线对准确率和实时性的要求,可大大提高定制化木门转线及堆垛效率。 相似文献
5.
Muhammad Adnan Khan Abdur Rehman Khalid Masood Khan Mohammed A. Al Ghamdi Sultan H. Almotiri 《计算机、材料和连续体（英文）》2021,66(1):467-480
Networks provide a significant function in everyday life, and cybersecurity therefore developed a critical field of study. The Intrusion detection system(IDS) becoming an essential information protection strategy that tracks the situation of the software and hardware operating on the network. Notwithstandingadvancements of growth, current intrusion detection systems also experience dif-ficulties in enhancing detection precision, growing false alarm levels and identifying suspicious activities. In order to address above mentioned issues, severalresearchers concentrated on designing intrusion detection systems that rely onmachine learning approaches. Machine learning models will accurately identifythe underlying variations among regular information and irregular informationwith incredible efficiency. Artificial intelligence, particularly machine learningmethods can be used to develop an intelligent intrusion detection framework.There in this article in order to achieve this objective, we propose an intrusiondetection system focused on a Deep extreme learning machine (DELM) whichfirst establishes the assessment of safety features that lead to their prominenceand then constructs an adaptive intrusion detection system focusing on the important features. In the moment, we researched the viability of our suggested DELMbased intrusion detection system by conducting dataset assessments and evaluating the performance factors to validate the system reliability. The experimentalresults illustrate that the suggested framework outclasses traditional algorithms.In fact, the suggested framework is not only of interest to scientific researchbut also of functional importance. 相似文献
6.
煤炭港在使用装船机的溜筒卸载煤的过程中会产生扬尘,港口为了除尘,需要先对粉尘进行检测。为解决粉尘检测问题,本文提出一种基于深度学习(YOLOv4-tiny)的溜筒卸料煤粉尘的检测方法。利用改进的YOLOv4-tiny算法对溜筒卸料粉尘数据集进行训练和测试,由于检测算法无法获知粉尘浓度,本文将粉尘分为四类分别进行检测,最后统计四类粉尘的检测框总面积,通过对这些数据做加权和计算近似判断粉尘浓度大小。实验结果表明,四类粉尘的检测精度(AP)分别为93.98%、93.57%、80.03%和57.43%,平均检测精度(mAP)为81.27%,接近YOLOv4的83.38%,而检测速度(FPS)为25.1,高于YOLOv4的13.4。该算法较好地平衡了粉尘检测的速率和精度,可用于实时的粉尘检测以提高抑制溜筒卸料产生的煤粉尘的效率。 相似文献
7.
目的 将基于深度学习的YOLOv5算法应用于PCB裸板的缺陷检测上,以提高检测的准确率。方法 通过增加特征融合通路,将C2、C3、C4层直接与P2、P3、P4层相连,从而减小信息的损耗;引入更浅层的C2、F2、P2特征图以增加图像的细节信息;并且使用注意力机制SE_block,大幅提高原算法的准确率。结果 改进后的网络的平均精度由91.54%提高至97.36%,提高了5.82%,并且对于各类缺陷,算法的检测精度都能保持在90%以上,满足工业的需求。结论 文中的算法提高了检测精度,体现了浅层信息在小目标检测上的作用,验证了多信息融合通路的优势,彰显了注意力机制的优越性,相比于原算法具有一定的优势。 相似文献
8.
In network-based intrusion detection practices, there are more regular instances than intrusion instances. Because there is always a statistical imbalance in the instances, it is difficult to train the intrusion detection system effectively. In this work, we compare intrusion detection performance by increasing the rarely appearing instances rather than by eliminating the frequently appearing duplicate instances. Our technique mitigates the statistical imbalance in these instances. We also carried out an experiment on the training model by increasing the instances, thereby increasing the attack instances step by step up to 13 levels. The experiments included not only known attacks, but also unknown new intrusions. The results are compared with the existing studies from the literature, and show an improvement in accuracy, sensitivity, and specificity over previous studies. The detection rates for the remote-to-user (R2L) and user-to-root (U2L) categories are improved significantly by adding fewer instances. The detection of many intrusions is increased from a very low to a very high detection rate. The detection of newer attacks that had not been used in training improved from 9% to 12%. This study has practical applications in network administration to protect from known and unknown attacks. If network administrators are running out of instances for some attacks, they can increase the number of instances with rarely appearing instances, thereby improving the detection of both known and unknown new attacks. 相似文献
9.
目的 解决现有工业线束导线排序检测方法中存在的效率低、混色导线检测效果差等问题。方法 基于机器视觉技术设计一种线束导线排序检测装置,并结合图像处理技术和深度学习原理提出一种混色导线排序检测方法。首先根据线束图像中选择的感兴趣区域,分割出线束连接器图像和导线图像,并采用模板匹配和颜色定位方法完成连接器正反面的识别和单色导线的识别定位;然后采集并制作PE混色导线数据集,研究Faster R−CNN、SSD、YOLOv3和YOLOv5m等4种不同目标检测算法对PE混色导线的检测效果。结果 实验结果表明,YOLOv5m检测模型的检测速度和准确率兼顾性最好;改进系统后,检测时间减少了18.55%,平均识别准确率为98.83%。结论 改进后检测系统具有良好的检测效率和可靠性,适用于种类丰富的工业线束导线排序检测。 相似文献
10.
为了解决复杂场景下激光跟踪仪对合作目标靶球的精确识别难题,提出了基于深度学习的合作目标靶球高效检测方法。首先分析了合作目标靶球的图像特征,然后采用改进的YOLOv2模型,针对合作目标靶球多尺度与小目标占比多的特点,提出了一种基于注意力机制的改进方法,同时为提高网络模型对复杂背景的抗干扰能力,提出了一种数据增强方法。测试结果表明,所提出的基于注意力机制与数据增强的改进YOLOv2模型对复杂背景的抗干扰能力较强,且对合作目标靶球的检测精度有显著提高,在合作目标靶球测试集上的检测准确率达到92.25%,能够有效满足激光跟踪仪在大型装置精密装配过程中的目标检测精度需求。 相似文献
11.
Ning Ding;Xu Bao;Shantong Sun;Yun Wang; 《International journal of imaging systems and technology》2024,34(2):e22999
Urinary sediment image detection, as one of the three major routine clinical tests in medical practice, is an important method for physical examination and diagnosis of urinary system diseases. Crystalluria detection is a subtask of urinary sediment image detection, focusing on detecting and identifying crystalline components in urine. To address the issues of low accuracy and inefficiency caused by small crystal granularity in crystalluria detection, we propose the Dilated Bilinear Space Pyramid ConvNext Network (DBSPC-Net), which achieves high-precision real-time crystalluria detection. DBSPC-Net ingeniously combines dilated convolution pooling with bilinear space pyramid, introducing Dilated Bilinear Space Pyramid Pooling (DBSPP) to enlarge the receptive field and capture information at multiple scales. Additionally, we utilize the Normalized Gaussian Wasserstein Distance Loss (NWDLoss) instead of Intersection over Union (IoU) to enhance the recognition of small targets. Finally, the ConvNext module is employed to fuse local and global features, enhancing urine crystal recognition accuracy and speed. The crystalluria dataset is sourced from 400 actual patients in a hospital. It comprises five main types of urine crystals, namely calcium oxalate dihydrate, calcium oxalate monohydrate, uric acid, ammonium magnesium phosphate, and cystine. Experimental results demonstrate that the proposed improved model achieves an average precision of 87.34% and a detection time of 7.9 ms per urine crystal image. DBSPC-Net can accurately and rapidly identify crystalluria objects in scenarios involving microscope mica compensation, meeting the requirements of algorithmic detection accuracy and real-time performance in crystalluria detection. 相似文献
12.
为了提高目标检测的准确性,提出了一种基于深度学习利用特征图加权融合实现目标检测的方法。首先,提出将卷积神经网络中的浅层特征图采样后与最深层特征图进行加权融合的思想;其次,根据所提的特征图加权融合思想以及卷积神经网络的具体结构,制定相应的特征图加权融合方案,并由该方案得到新特征图;然后,提出改进的RPN网络,并将新特征图输入到改进的RPN网络得到区域建议;最后,将新特征图和区域建议输入到后续网络层完成目标检测。实验结果表明所提方法取得了更高的目标检测精度以及更好的目标检测效果。 相似文献
13.
Kashif Iqbal Sagheer Abbas Muhammad Adnan Khan Atifa Athar Muhammad Saleem Khan Areej Fatima Gulzar Ahmad 《计算机、材料和连续体（英文）》2021,66(2):1595-1613
The rapid development and progress in deep machine-learning techniques have become a key factor in solving the future challenges of humanity. Vision-based target detection and object classification have been improved due to the development of deep learning algorithms. Data fusion in autonomous driving is a fact and a prerequisite task of data preprocessing from multi-sensors that provide a precise, well-engineered, and complete detection of objects, scene or events. The target of the current study is to develop an in-vehicle information system to prevent or at least mitigate traffic issues related to parking detection and traffic congestion detection. In this study we examined to solve these problems described by (1) extracting region-of-interest in the images (2) vehicle detection based on instance segmentation, and (3) building deep learning model based on the key features obtained from input parking images. We build a deep machine learning algorithm that enables collecting real video-camera feeds from vision sensors and predicting free parking spaces. Image augmentation techniques were performed using edge detection, cropping, refined by rotating, thresholding, resizing, or color augment to predict the region of bounding boxes. A deep convolutional neural network F-MTCNN model is proposed that simultaneously capable for compiling, training, validating and testing on parking video frames through video-camera. The results of proposed model employing on publicly available PK-Lot parking dataset and the optimized model achieved a relatively higher accuracy 97.6% than previous reported methodologies. Moreover, this article presents mathematical and simulation results using state-of-the-art deep learning technologies for smart parking space detection. The results are verified using Python, TensorFlow, OpenCV computer simulation frameworks. 相似文献
14.
JIANG Yueyu;XIA Ling;JIANG Bingyue;HAN Wei;WANG Kang 《测试技术学报》2024,38(4):435-440
A solution based on DNN-SVM is proposed for fault detection and localization in the electric power wireless mesh network system. The timely and accurate identification and localization of faults in the electric power wireless mesh network system pose challenges for maintenance and repair work. In this paper, real-time data from the electric power wireless mesh network system, including signal strength, signal quality, and PCE operating status, is collected using dedicated devices. A DNN-SVM algorithm is constructed to achieve simultaneous fault detection and localization in the wireless mesh network. The DNN is used to discriminate fault states, while the multilayer binary SVM is employed for fault-type classification. Experimental validation is conducted on an actual electric power wireless mesh network dataset. The decision time for a single data sample is in the millisecond range, and the overall average accuracy rate is 80%. 相似文献
15.
16.
Khalid Masood Mahmoud M. Al-Sakhnini Waqas Nawaz Tauqeer Faiz Abdul Salam Mohammad Hamza Kashif 《计算机、材料和连续体（英文）》2023,74(3):5417-5430
Generally, conventional methods for anomaly detection rely on clustering, proximity, or classification. With the massive growth in surveillance videos, outliers or anomalies find ingenious ways to obscure themselves in the network and make conventional techniques inefficient. This research explores the structure of Graph neural networks (GNNs) that generalize deep learning frameworks to graph-structured data. Every node in the graph structure is labeled and anomalies, represented by unlabeled nodes, are predicted by performing random walks on the node-based graph structures. Due to their strong learning abilities, GNNs gained popularity in various domains such as natural language processing, social network analytics and healthcare. Anomaly detection is a challenging task in computer vision but the proposed algorithm using GNNs efficiently performs the identification of anomalies. The Graph-based deep learning networks are designed to predict unknown objects and outliers. In our case, they detect unusual objects in the form of malicious nodes. The edges between nodes represent a relationship of nodes among each other. In case of anomaly, such as the bike rider in Pedestrians data, the rider node has a negative value for the edge and it is identified as an anomaly. The encoding and decoding layers are crucial for determining how statistical measurements affect anomaly identification and for correcting the graph path to the best possible outcome. Results show that the proposed framework is a step ahead of the traditional approaches in detecting unusual activities, which shows a huge potential in automatically monitoring surveillance videos. Performing autonomous monitoring of CCTV, crime control and damage or destruction by a group of people or crowd can be identified and alarms may be triggered in unusual activities in streets or public places. The suggested GNN model improves accuracy by 4% for the Pedestrian 2 dataset and 12% for the Pedestrian 1 dataset compared to a few state-of-the-art techniques. 相似文献
17.
目的 针对目前表面缺陷检测方法因缺少实例级标签,使深度神经网络在工业检测上的应用受到限制的问题。本文面向实际的纸板表面缺陷检测任务,提出弱监督学习下融合卷积和注意力机制的神经网络算法。方法 该网络通过将通道注意力模块和梯度类激活映射模块相结合,进一步提高类激活图的精细度,实现纸板表面缺陷的精确定位;同时通过倒残缺结构和上采样层的组合操作,进一步细化浅层特征提升网络的特征提取能力,加快网络收敛速度。结果 通过在公开的纸板缺陷数据集上进行实验,本文提出的算法在使用图像级标签训练的情况下,分类正确率与定位正确率分别达到99.0%和92.2%,验证了该算法的有效性。结论 避免了实例级标签数量较少和过于主观的缺点,为基于机器人的缺陷纸板剔除奠定了基础。 相似文献
18.
Yong Luo Xiaojie Li Chao Luo Feng Wang Xi Wu Imran Mumtaz Cheng Yi 《计算机、材料和连续体（英文）》2020,65(2):1771-1780
Tissue segmentation is a fundamental and important task in nasopharyngeal images analysis. However, it is a challenging task to accurately and quickly segment various tissues in the nasopharynx region due to the small difference in gray value between tissues in the nasopharyngeal image and the complexity of the tissue structure. In this paper, we propose a novel tissue segmentation approach based on a two-stage learning framework and U-Net. In the proposed methodology, the network consists of two segmentation modules. The first module performs rough segmentation and the second module performs accurate segmentation. Considering the training time and the limitation of computing resources, the structure of the second module is simpler and the number of network layers is less. In addition, our segmentation module is based on U-Net and incorporates a skip structure, which can make full use of the original features of the data and avoid feature loss. We evaluated our proposed method on the nasopharyngeal dataset provided by West China Hospital of Sichuan University. The experimental results show that the proposed method is superior to many standard segmentation structures and the recently proposed nasopharyngeal tissue segmentation method, and can be easily generalized across different tissue types in various organs. 相似文献
19.
交通标志检测是自动驾驶领域重要的环节,针对当前交通标志的识别存在漏检、误检、模型参数多,以及常见且复杂的代表性真实环境情况,如雾天鲁棒性差的问题,提出一种改进YOLOv5的小目标交通标志识别算法.首先对数据集进行雾化操作以适应在雾天情况下的准确识别,使用更加轻量的部分卷积(partial convolution,PConv)构建PC3特征提取模块;随后在颈部网络中提出延伸的特征金字塔(extended feature pyramid network,EFPN),为小目标添加一个小目标检测头,同时删去原始颈部网络中针对大目标的检测头,提高小目标识别准确率的同时降低网络参数;最后引入Focal-EIOU替换CIOU作为损失函数,以此来解决小目标的误检和漏检问题,嵌入CBAM注意力机制,提升网络模型的特征提取能力.改进的模型性能在TT100K数据集上得到验证,与原YOLOv5算法相比,改进模型在精确率(P)、mAP0.5上分别提高了8.9%、4.4%,参数量降低了44.4%,在NVIDIA 3080设备上FPS值为151.5,可满足真实场景中交通标志的实时检测. 相似文献
20.
Mohammad Hafiz Mohd Yusof Abdullah Mohd Zin Nurhizam Safie Mohd Satar 《计算机、材料和连续体（英文）》2022,72(2):2445-2466
Due to polymorphic nature of malware attack, a signature-based analysis is no longer sufficient to solve polymorphic and stealth nature of malware attacks. On the other hand, state-of-the-art methods like deep learning require labelled dataset as a target to train a supervised model. This is unlikely to be the case in production network as the dataset is unstructured and has no label. Hence an unsupervised learning is recommended. Behavioral study is one of the techniques to elicit traffic pattern. However, studies have shown that existing behavioral intrusion detection model had a few issues which had been parameterized into its common characteristics, namely lack of prior information (p (θ)), and reduced parameters (θ). Therefore, this study aims to utilize the previously built Feature Selection Model subsequently to design a Predictive Analytics Model based on Bayesian Network used to improve the analysis prediction. Feature Selection Model is used to learn significant label as a target and Bayesian Network is a sophisticated probabilistic approach to predict intrusion. Finally, the results are extended to evaluate detection, accuracy and false alarm rate of the model against the subject matter expert model, Support Vector Machine (SVM), k nearest neighbor (k-NN) using simulated and ground-truth dataset. The ground-truth dataset from the production traffic of one of the largest healthcare provider in Malaysia is used to promote realism on the real use case scenario. Results have shown that the proposed model consistently outperformed other models. 相似文献