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2021 6th International Conference on Computer Science and Engineering (UBMK)最新文献

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Analyzing Deep Learning Models’ Generalization Ability Under Different Augmentations on Deepfake Datasets 深度学习模型在Deepfake数据集上不同增强的泛化能力分析
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558927
Ilkin Huseynli, Songül Varlı
Deepfakes allow users to manipulate the identity of a person in a video or an image. Improvements on GAN-based techniques also generate more realistic and hard to detect fake faces. This threatens individuals and decreases trust in social media platforms. In this work, our goal is to report eight different models’ learning ability on, by far, the largest fake face dataset - DFDC. The models’ generalization ability was tested on the DFDC test set and Celeb-DF-v2 dataset. Effect of the various cut-out like augmentations to the learning was also reported.
深度造假允许用户在视频或图像中操纵一个人的身份。基于gan技术的改进也产生了更加逼真和难以检测的假脸。这威胁到个人,降低了对社交媒体平台的信任。在这项工作中,我们的目标是报告八种不同模型在迄今为止最大的假人脸数据集DFDC上的学习能力。在DFDC测试集和Celeb-DF-v2数据集上对模型的泛化能力进行了测试。还报道了各种切割样增强对学习的影响。
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引用次数: 1
A UML-Based Conceptual Model for Appointment Booking Systems 基于uml的预约系统概念模型
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558929
Ali Pişirgen, Serhat Peker
Online appointment is now a growing trend that leads developers to create appointment booking systems for various industries such as health, education, tourism, transportation, production, and beauty. While different conceptual unified modelling language (UML) models exist for each industry, this causes time and cost consumption for business and leads inefficient use of resources. This study, therefore, intends to provide a UML based conceptual model for appointment booking system that enable system analyst and developers to gain advantage with regards to system development activities. Three different UML diagrams are used to demonstrate the users, the relationship between users and system, the exchange of commends. With this study, using the proposed generic model acting like a bridge between developers and coding, appointment booking application can be easily developed.
在线预约现在是一个日益增长的趋势,它引导开发人员为各种行业(如健康、教育、旅游、交通、生产和美容)创建预约系统。虽然每个行业都存在不同的概念性统一建模语言(UML)模型,但这会导致业务的时间和成本消耗,并导致资源的低效使用。因此,本研究打算为预约系统提供一个基于UML的概念模型,使系统分析师和开发人员能够在系统开发活动方面获得优势。使用三种不同的UML图来演示用户、用户与系统之间的关系以及交换意见。通过本研究,使用所提出的通用模型作为开发人员和编码之间的桥梁,可以轻松开发预约应用程序。
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引用次数: 3
FPGA-based Minimal Latency HEFT Scheduler for Heterogeneous Computing 基于fpga的异构计算最小延迟HEFT调度程序
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558926
I. Aliyev, J. Mack, Nirmal Kumbhare, A. Akoglu, H. F. Ugurdag
This paper proposes a new hardware scheduler. As heterogeneous computing becomes prevalent, mapping applications on to multiple processing elements (PEs) proves to be non-trivial. Heterogeneous Earliest Finish Time (HEFT) algorithm is an already existing scheduler that aims to minimize the total execution time of an application. The paradigm of HEFT is such that it accepts an acyclic task graph as input at run-time and assigns/schedules the precompiled atomic tasks to PEs. HEFT stands out among many such schedulers not only in terms of producing shorter schedules but also in terms of its own short execution time. However, in real-time applications, the lower the latency, the better it is. To the best of our knowledge, this work is the only work that implements HEFT in hardware (on FPGA) further lowering its latency from milliseconds to as much as less than a microsecond. Porting HEFT to hardware has been challenging as data dependencies limit the amount of parallelism. Design of an efficient memory access pattern as well as an “incremental sorter” were key enablers in reducing the latency of the hardware implementation. We also integrated our FPGA-HEFT into an ARM-based SoC and validated its functionality using a realistic workload.
本文提出了一种新的硬件调度程序。随着异构计算的流行,将应用程序映射到多个处理元素(pe)被证明是非常重要的。异构最早完成时间(HEFT)算法是一种现有的调度器,旨在最小化应用程序的总执行时间。HEFT的范例是这样的:它在运行时接受非循环任务图作为输入,并将预编译的原子任务分配/调度给pe。HEFT在许多这样的调度器中脱颖而出,不仅因为它产生更短的调度,而且因为它自己的执行时间也很短。然而,在实时应用程序中,延迟越低越好。据我们所知,这项工作是唯一在硬件(FPGA)上实现HEFT的工作,进一步将其延迟从几毫秒降低到不到一微秒。将HEFT移植到硬件是一个挑战,因为数据依赖性限制了并行性的数量。高效内存访问模式的设计以及“增量排序器”是减少硬件实现延迟的关键因素。我们还将FPGA-HEFT集成到基于arm的SoC中,并使用实际工作负载验证其功能。
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引用次数: 3
An Ensemble Approach for Automatic Artefact Detection on Gastroendoscopy Images 胃内窥镜图像伪影自动检测的集成方法
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558919
Furkan Artunc, I. Oksuz
Endoscopy imaging is a clinical procedure for the early detection of numerous cancers as well as for therapeutic procedures and minimally invasive surgery. Using endoscopic examination data to detect diseases is very helpful for medical doctors and speeds up the diagnosis. Because of the very narrow area, captured frames during endoscopic examination include a variety of artefacts. Artefacts degrade diagnostic image quality, which in turn makes disease diagnosis difficult for both clinicians and computer aided disease detection algorithms. Therefore, it is very crucial to find and eliminate those artefacts from medical images. In this paper, a detection system which utilizes ensemble of deep learning models and data augmentation is proposed. A fast and accurate object detection model which is YOLOv5 (improved version of YOLOv4) is selected as a base model. The 3 separate models are trained with segregated and augmented data; then, the models are combined to make an ensemble. The EndoCV2020 dataset is utilized to benchmark the ensemble model. The model achieves state-of-the-art performance with 49.6 mAP. The final mAP is calculated averaging several APs for different IoU thresholds (starting from 0.25 IoU to 0.75 Iou with step size 0.05).
内窥镜成像是许多癌症早期检测的临床程序,也是治疗程序和微创手术的临床程序。利用内窥镜检查数据来发现疾病,对医生有很大的帮助,加快了诊断速度。由于非常狭窄的区域,在内窥镜检查期间捕获的帧包括各种各样的伪影。伪影降低了诊断图像的质量,这反过来又使临床医生和计算机辅助疾病检测算法难以进行疾病诊断。因此,从医学图像中发现和消除这些伪影是非常重要的。本文提出了一种基于深度学习模型集成和数据增强的检测系统。选择快速准确的目标检测模型YOLOv5 (YOLOv4的改进版本)作为基础模型。这3个独立的模型使用分离和增强的数据进行训练;然后,将这些模型组合成一个整体。利用EndoCV2020数据集对集成模型进行基准测试。该模型达到了49.6 mAP的最先进性能。最后的mAP是针对不同的IoU阈值(从0.25 IoU到0.75 IoU,步长为0.05)计算几个ap的平均值。
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引用次数: 0
Gender Determination from Pictures with CNN Models 从CNN模特的图片中确定性别
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558915
E. Bulus
Today, it is desired to make various inferences from images quickly with artificial intelligence methods. One of the most important reasons for this is the increase in social media environments. On the other hand, it is desired to evaluate the images with artificial intelligence methods for security purposes. In this study, it was investigated how much the determination of the gender of a person from a face photograph can be done with existing methods. For this purpose, two of the widely used Convolutional Neural Network (CNN) methods were selected. The selected methods are caffemodel and vggl6 model. The accuracy of both methods was tested for the prepared male and female face images.
目前,人们希望利用人工智能方法从图像中快速做出各种推断。其中一个最重要的原因是社交媒体环境的增加。另一方面,出于安全目的,希望使用人工智能方法对图像进行评估。在这项研究中,研究人员调查了现有方法在多大程度上可以从人脸照片中确定一个人的性别。为此,选择了两种广泛使用的卷积神经网络(CNN)方法。选择的方法有caffemodel和vggl6模型。对两种方法的准确性进行了测试。
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引用次数: 0
Empirical Comparison of Deep Neural Networks for Brain Vessel Segmentation 深度神经网络用于脑血管分割的经验比较
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9559015
Tuğçe Koçak, M. Aydın, Berna Kiraz
Examination, monitoring and analysis of structural changes in the blood vessels of the brain enable the observation of brain functions. Therefore, the segmentation of the entire cerebral vascular network (including the capillaries) is of great importance in terms of the relevant specialist’s opinion on the diagnosis and treatment of a disease. When performed manuall, segmentation of the vascular network of the brain is a long time-consuming and fault-tolerant process. The automatic segmentation of the brain microvascular structure with machine learning approaches eliminates the need for specialists, and provides a method for perfroming cerebral vessel segmentation in a short time. This study provides the empirical comparision of three different deep neural network models including autoencoder, U-Net and ResNet+U-Net for the vascular network segmentation of brain vessels. The experiments are conducted on vesseINN dataset, which is a volumetric cerebrovascular system dataset obtained by two-photon microscopy. The models are evaluated based on accuracy, f1-score, recall, and precision metrics. During the training phase, U-Net and ResNet+Unet achieve 98% accuracy. Auto-encoder, on the other hand, yields 95% accuracy. In the test phase, it is observed that U-Net and ResNet+U-Net models give better results than the autoencoder model, according to the results obtained with 97% accuracy for U-Net and ResNet+Unet networks and 95% accuracy for autoencoder.
对大脑血管结构变化的检查、监测和分析使观察大脑功能成为可能。因此,整个脑血管网(包括毛细血管)的分割对于相关专科医生对疾病的诊断和治疗的意见具有重要意义。人工分割脑血管网络是一个耗时长、容错大的过程。利用机器学习方法对大脑微血管结构进行自动分割,消除了对专家的需要,为在短时间内进行脑血管分割提供了一种方法。本研究对autoencoder、U-Net和ResNet+U-Net三种不同的深度神经网络模型在脑血管血管网络分割中的应用进行了实证比较。实验在vesseINN数据集上进行,该数据集是由双光子显微镜获得的容量脑血管系统数据集。这些模型是根据准确性、f1分数、召回率和精度指标进行评估的。在训练阶段,U-Net和ResNet+Unet的准确率达到98%。另一方面,自动编码器产生95%的准确率。在测试阶段,我们观察到U-Net和ResNet+U-Net模型比自编码器模型给出了更好的结果,根据获得的结果,U-Net和ResNet+Unet网络的准确率为97%,自动编码器的准确率为95%。
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引用次数: 1
Anomaly Detection with Deep Long Short Term Memory Networks 深度长短期记忆网络异常检测
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9559034
M. B. Terzi
In this study, a robust anomaly detection technique for ECG signals is developed using deep gated recurrent neural networks (GRNN) with Gated Recurrent Unit (GRU) and Long Short Term Memory (LSTM) unit. By training deep GRU and LSTM networks on normal ECG data acquired from healthy subjects, a robust prediction model that learns to predict future time steps of ECG time series is developed. The prediction errors are modeled using Multivariate Gaussian Distribution and the estimations of optimum parameters were performed via Maximum Likelihood Estimation (MLE) method. By using probability distributions of prediction errors and optimum threshold values, the classification of normal and abnormal time series is performed. The results of the study show that deep LSTM networks with stacked recurrent hidden layers can learn higher-level temporal features in ECG time series without prior knowledge of the data and can robustly model normal time series behaviors. The performance results of the proposed deep learning and Gaussian-based statistical anomaly detection technique over the European ST-T database show that the technique provides the reliable diagnosis of cardiovascular diseases by performing the robust detection of anomalies in ECG time series.
本文提出了一种基于门控递归单元(GRU)和长短期记忆单元(LSTM)的深度门控递归神经网络(GRNN)的心电信号鲁棒异常检测技术。通过对健康受试者的正常心电数据进行深度GRU和LSTM网络训练,建立了一种学习预测心电时间序列未来时间步长的鲁棒预测模型。采用多元高斯分布对预测误差进行建模,并采用最大似然估计(MLE)方法对最佳参数进行估计。利用预测误差的概率分布和最优阈值对时间序列进行正常和异常分类。研究结果表明,叠置递归隐藏层的深度LSTM网络可以在不需要先验知识的情况下学习ECG时间序列中更高层次的时间特征,并且可以对正常时间序列行为进行鲁棒建模。本文提出的深度学习和基于高斯的统计异常检测技术在欧洲ST-T数据库上的性能结果表明,该技术通过对ECG时间序列中的异常进行鲁棒检测,提供了可靠的心血管疾病诊断。
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引用次数: 0
Comparison of Feature Selection Methods in Security Analysis of Android Android安全分析中特征选择方法的比较
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558984
R. Arslan
Feature selection as a dimension reduction technique aims to select the subset containing less features by removing unrelated redundant or noisy features. While feature selection generally provides a better recognition performance, it also brings significant gains in calculation cost. In this study, the effects of using the most up-to-date feature selection methods on Android malware detection are shown. In order to observe this effect, test sets in 90 different combinations were prepared and comprehensive experiments were carried out objectively. As a result of the tests, a 4% increase in classification performance was achieved with the recursive feature selection method(RFE), while the gain in calculation cost was 39.39% in the chi2 method. Feature selection in application security analysis in the Android both contributed to the success of classification and reduced the time needed for classification. With this study, it has been shown the feature selection methods are an improvement that can affect the results of studies on Android security.
特征选择是一种降维技术,目的是通过去除不相关的冗余特征或噪声特征来选择包含较少特征的子集。特征选择通常可以提供更好的识别性能,但也会带来计算成本的显著提高。在本研究中,展示了使用最新的特征选择方法对Android恶意软件检测的影响。为了观察这种效果,我们准备了90种不同组合的测试集,客观地进行了全面的实验。实验结果表明,递归特征选择方法(RFE)的分类性能提高4%,而chi2方法的计算成本提高39.39%。Android应用安全分析中的特征选择既有助于分类的成功,又减少了分类所需的时间。通过本研究表明,特征选择方法是一种改进,可以影响Android安全性研究的结果。
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引用次数: 0
Demographic Targeting With Epsilon-greedy Exploration in Digital Advertising 数字广告中Epsilon-greedy探索的人口定位
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558951
Basak Esin Köktürk Güzel, Bora Mocan, Büsra Arslan, Gokce Polat, Tarık Kavuşan
Digital advertising agencies and advertisers place billions of ads on search network every day. Managing these ads brings a lot of workload. One of the biggest problems in the growing digital advertising industry is bid optimization. The selection of the target audience, the randomness of user inquiries, the determination of ads by the auction system are the main factors that complicate the optimization problem. Reinforcement learning algorithms have become popular with their structures that provide solutions to complex problems in the field of advertising optimization in recent years. In this study, we determined the device, age, city and gender information of the target audience that will maximize the conversion rate of the campaign by using the most basic of reinforcement learning algorithms which is epsilon greedy.
数字广告代理商和广告商每天在搜索网络上投放数十亿的广告。管理这些广告带来了大量的工作量。不断发展的数字广告行业面临的最大问题之一是竞价优化。目标受众的选择、用户查询的随机性、拍卖系统对广告的决定是使优化问题复杂化的主要因素。近年来,强化学习算法以其结构为广告优化领域的复杂问题提供了解决方案而受到欢迎。在这项研究中,我们确定了目标受众的设备、年龄、城市和性别信息,这些信息将通过使用最基本的强化学习算法(epsilon greedy)来最大化活动的转化率。
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引用次数: 1
Real-Time Puddle Detection Using Convolutional Neural Networks with Unmanned Aerial Vehicles 基于卷积神经网络的无人机实时水坑检测
Pub Date : 2021-09-15 DOI: 10.1109/UBMK52708.2021.9558907
Mehmet Bilge Han Tas, Muhammed Coskun Irmak, Sedat Turan, A. Hasiloglu
The study was carried out in order to enable systems with weak processing power and motion to detect objects using cloud services. In addition, the dataset is expanded by continuous labeling to create big data. In the study, it is aimed to detect objects using cloud-based deep learning methods with an unmanned aerial vehicle (UAV). In the study, training processes were carried out with Google Colaboratory, a cloud service provider. The training processes are a YOLO-based system, and a convolutional neural network was created by revising the parameters in line with the needs. The convolutional neural network model provides communication between neurons in the convolutional layers by bringing the image data to the desired pixel ranges. Unlabeled pictures are included in the training by being tagged. In this way, it is possible to continuously enlarge the data pool. Since the microcomputers used in UAVs are insufficient for these processes, a cloud-based training model has been created. As a result of the study, cloud-based deep learning models work as desired. It is possible to show the accuracy of the model with the low losses seen in the loss functions and the mAP value. Graphic cards with high processing power are needed to provide training. It is essential to use powerful graphics cards when working on image data. Cost reduced by using cloud services. The training was accelerated and high-rate object detections were made. YOLOv5x was used in the study. It is preferred because of its fast training and high frame rate. Recall 80% Precision 93% mAP 82.6% values were taken.
进行这项研究是为了使处理能力和运动能力较弱的系统能够使用云服务检测物体。此外,通过连续标注扩展数据集,创建大数据。在这项研究中,它的目标是利用基于云的深度学习方法与无人机(UAV)一起检测物体。在这项研究中,培训过程是与云服务提供商谷歌合作进行的。训练过程是一个基于yolo的系统,并根据需要修改参数来创建卷积神经网络。卷积神经网络模型通过将图像数据带到所需的像素范围来提供卷积层中神经元之间的通信。未标记的图片通过标记被包含在训练中。这样,就可以不断地扩大数据池。由于无人机中使用的微型计算机不足以完成这些过程,因此创建了基于云的训练模型。这项研究的结果是,基于云的深度学习模型可以按预期工作。在损失函数和mAP值中看到的低损失可以显示模型的准确性。需要具有高处理能力的图形卡来提供培训。在处理图像数据时,使用功能强大的显卡是必不可少的。通过使用云服务降低成本。训练速度加快,目标检测率提高。本研究使用的是YOLOv5x。它的训练速度快,帧率高,是首选。召回率80%,精密度93%,mAP值82.6%。
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引用次数: 0
期刊
2021 6th International Conference on Computer Science and Engineering (UBMK)
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