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Optimizing Read Operations of Hadoop Distributed File System on Heterogeneous Storages Hadoop分布式文件系统在异构存储上的读操作优化
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-05-01 DOI: 10.6688/JISE.202105_37(3).0013
Jongbaeg Lee, Jong-Woo Lee, Sang-Won Lee
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引用次数: 0
Stepwise Adaptive Video Streaming in the Wireless Mobile Network Using the Temporal-Geo Bandwidth Estimation Method 基于时地带宽估计方法的无线移动网络逐步自适应视频流
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-05-01 DOI: 10.6688/JISE.20210537(3).0011
Chung-Ming Huang, Chung-Ming Wei
With the advance of wireless mobile communication technologies, video streaming has advanced much more on these years. However, the wireless mobile network usually suffers fluctuation in available bandwidth because mobile users usually keep moving and playing streaming video simultaneously. To overcome the situation, this work proposed a method called Stepwise Adaptive Streaming using Temporal-Geo Bandwidth Estimation (SASTGBE) for the wireless mobile networking environment based on MPEG Dynamic Adaptive Streaming over HTTP (MPEG-DASH). To have better Quality Of Experience (QoE), e.g., no or fewer quality switching, lower bitrate difference between two continuous video segments, no or fewer suspended times, no or shorter paused time, etc., (1) the proposed method considers location, time, and date for estimating the available bandwidth in the future and (2) the proposed stepwise adaptive streaming control scheme considers buffer level, video quality of the most recently downloaded segment, the downloading rate of the most recently downloaded segment and the estimated bandwidth to decide the video quality for the next downloaded segment. The proposed method has been implemented in the Android system for the client side and the Linux system for the server side. The experiments using SASTGBE in the real environment shown that SASTGBE has improvement in the performance of bandwidth utilization, suspended times, quality switch percentage, average bitrate difference considering suspending, and standard deviation of bitrate difference over the wireless mobile network.
随着无线移动通信技术的发展,视频流技术近年来有了很大的发展。然而,由于移动用户经常同时移动和播放流媒体视频,无线移动网络的可用带宽经常会出现波动。为了克服这种情况,本工作提出了一种基于MPEG动态自适应流over HTTP (MPEG- dash)的无线移动网络环境中使用时地带宽估计的逐步自适应流(SASTGBE)方法。为了获得更好的体验质量(QoE),例如,没有或更少的质量切换,两个连续视频片段之间的比特率差更小,没有或更少的暂停时间,没有或更短的暂停时间等,(1)提出的方法考虑位置,时间和日期来估计未来可用的带宽;(2)提出的逐步自适应流控制方案考虑缓冲级别,最近下载的视频片段的视频质量,最近下载段的下载速率和估计带宽,以决定下一个下载段的视频质量。该方法已在客户端为Android系统和服务器端为Linux系统上实现。在实际环境中使用SASTGBE的实验表明,SASTGBE在带宽利用率、挂起次数、质量切换率、考虑挂起的平均比特率差、比特率差的标准差等性能上都有提高。
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引用次数: 1
Radar Automatic Target Recognition Based on Real-Life HRRP of Ship Target by Using Convolutional Neural Network 基于舰船目标真实HRRP的卷积神经网络雷达自动目标识别
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-04-01 DOI: 10.6688/JISE.202107_37(4).0001
Tsung-Pin Chen, Lin Chih-Lung, Kuo-Chin Fan, Lin Wan-Yu, Wan-Yu Kao
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引用次数: 0
Rectangle-Based Neo-Plasticism-Like Image - A New Type of Art Image and its Application to Covert Communication 基于矩形的新造型主义图像——一种新型的艺术图像及其在隐蔽传播中的应用
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-03-01 DOI: 10.6688/JISE.202103_37(2).0011
Shan-Chun Liu, Da-Chun Wu, Wen-Hsiang Tsai
A new type of art image, called rectangle-based Neo-Plasticism-like image, is proposed, via which messages can be hidden for covert communication. Also proposed is an automatic method for creating such art images, which applies recursive binary partitioning to a source image by finding the maximum mutual information of the spatial positions and image intensities of the divided sub-regions. The resulting image consists of rectangular regions separated by horizontal and vertical lines, which show the abstraction style of the Neo-Plasticism art. Attracted by the artistic image content, a hacker hopefully will pay no attention to the hidden secret. Two data hiding techniques based on the binary partition tree constructed in the art image creation process are proposed, which embed messages by replacing the LSBs of each rectangular region's colors or by generating additional partition lines in the region. A message extraction process is also proposed. Data security is considered seriously by randomizing the message bits before being embedded, changing randomly the priorities of the sub-regions used in message hiding, and embedding fake messages to interfere with the hacker. Good experimental results show the feasibility of the proposed techniques for covert communication via the proposed type of art image.
提出了一种新的艺术图像类型,称为基于矩形的新造型主义图像,通过它可以隐藏信息以进行隐蔽的交流。本文还提出了一种自动生成此类艺术图像的方法,该方法通过寻找划分的子区域的空间位置和图像强度的最大互信息,对源图像进行递归二值分割。由此产生的图像由水平线和垂直线分隔的矩形区域组成,体现了新造型主义艺术的抽象风格。被艺术图像内容所吸引,黑客希望不会注意到隐藏的秘密。提出了两种基于美术图像创建过程中构造的二叉分割树的数据隐藏技术,通过替换每个矩形区域颜色的lsdb或在区域中生成额外的分割线来嵌入信息。提出了一种消息提取过程。通过在嵌入前对消息位进行随机化处理,随机改变消息隐藏子区域的优先级,以及嵌入假消息以干扰黑客,对数据安全性进行了严格的考虑。良好的实验结果表明,利用所提出的艺术图像类型进行隐蔽通信的技术是可行的。
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引用次数: 0
Outpatient Text Classification System Using LSTM 基于LSTM的门诊文本分类系统
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-03-01 DOI: 10.6688/JISE.202103_37(2).0006
Che-Wen Chen, Shih-Pang Tseng, Jhing-Fa Wang
Outpatient text classification is an important problem in medical natural language processing. Existing research has conventionally focused on rule-based or knowledge-source-based feature engineering, but only a few studies have utilized the effective feature learning capabilities of deep learning methods. A long short-term memory (LSTM) model for the outpatient text classification system was proposed in this research. The system has the ability to classify outpatient categories according to textual content on website Taiwan E Hospital. The experimental results showed that our system has very well in the task. The success of the LSTM model applications in the outpatient system provide users to inquire about their health status as references.
门诊文本分类是医学自然语言处理中的一个重要问题。现有的研究通常集中在基于规则或基于知识来源的特征工程上,但很少有研究利用深度学习方法的有效特征学习能力。本研究提出一种用于门诊文本分类系统的长短期记忆(LSTM)模型。该系统具有根据台湾E医院网站文本内容对门诊进行分类的功能。实验结果表明,该系统能很好地完成任务。LSTM模型在门诊系统中的成功应用为用户提供了查询健康状况的参考。
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引用次数: 4
Dynamic Production Scheduling of Digital Twin Job-Shop Based on Edge Computing 基于边缘计算的数字双作业车间动态生产调度
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-01-01 DOI: 10.6688/JISE.202101_37(1).0007
Li-Zhang Xu, Q. Xie
The current production scheduling models cannot effectively enable the real-time interaction between information space and physical space. To dynamically schedule twin digital job-shop, this paper attempts to realize the dynamic scheduling of digital twin job-shop (DTJ) based on edge computing. First, the architecture of the DTJ was established by adding the digital twin between the business management layer and the operation execution layer of the traditional job-shop. On this basis, the DTJ was fully modelled, and the manufacturing process was monitored, analyzed and managed remoted by edge computing. To realize dynamic scheduling, a DTJ scheduling model was established through data mining. The model consists of two parts: a data collection model and a multi-scheduling knowledge model. Finally, the proposed DTJ scheduling model was verified through simulation on an actual job-shop. The research results shed new light on the optimization of manufacturing process in various types of job-shops.
现有的生产调度模型不能有效地实现信息空间与物理空间的实时交互。为了实现双数字作业车间的动态调度,本文尝试基于边缘计算实现双数字作业车间的动态调度。首先,通过在传统作业车间的业务管理层和操作执行层之间添加数字孪生,建立了作业车间的体系结构。在此基础上,对DTJ进行了全面建模,并通过边缘计算远程监控、分析和管理制造过程。为实现动态调度,通过数据挖掘建立了DTJ调度模型。该模型由两部分组成:数据收集模型和多调度知识模型。最后,通过实际作业车间的仿真验证了所提出的DTJ调度模型。研究结果为不同类型作业车间的制造过程优化提供了新的思路。
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引用次数: 7
A Dynamic Parallel Meshless Method for the Problems with Large-Scale Movable and Deformable Boundary 大规模可动可变形边界问题的动态并行无网格法
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-01-01 DOI: 10.6688/JISE.202101_37(1).0006
Liang Wang, Ruixia Xue, Ning Cai, Pan Chen, Xiaobo Cui, Wei Wu, Miaomiao Niu, Dongliang Zhang, Zhao Zhang, Xiaosong Zhang
This paper puts forward a dynamic parallel meshless computing algorithm that efficiently solves flow fields with largescale motions of movable and deformable boundaries. The partition boundary is updated, as the moving boundary moves across the material interface. Meanwhile, the point clouds near the moving boundary are reconstructed. Our algorithm also solves the workload balance between nodes and information exchange in each region of the computational field, using the governing equations in the arbitrary Lagrangian-Eulerian (ALE) form. The AUFS scheme is extended to calculate the numerical convective flux. Take the interaction between a helium bubble and a shockwave as an example. Our algorithm is applied to compute the flow field with different numbers of discrete points (33,044 and 66,089) and partitions (2 and 4). The results show that our algorithm achieves an efficiency of over 80%, and captures the interaction between shockwaves and the bubble accurately. Hence, our parallel algorithm is suitable for solving problems with largescale motions of deformation boundaries. The research results shed new light on the calculation speed for similar problems.
本文提出了一种动态并行无网格计算算法,可以有效地求解具有可动边界和可变形边界的大规模运动流场。分区边界被更新,因为移动边界在材料界面上移动。同时,对移动边界附近的点云进行重构。该算法还利用任意拉格朗日-欧拉(ALE)形式的控制方程,解决了计算场各区域节点之间的工作负载平衡和信息交换问题。将AUFS格式推广到数值对流通量的计算中。以氦气泡和冲击波之间的相互作用为例。将该算法应用于不同离散点数(33,044和66,089)和分区(2和4)的流场计算,结果表明,该算法的效率达到80%以上,并能准确地捕捉激波与气泡之间的相互作用。因此,我们的并行算法适用于求解具有大规模变形边界运动的问题。研究结果为类似问题的计算速度提供了新的思路。
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引用次数: 0
Mgini - Improved Decision Tree using Minority Class Sensitive Splitting Criterion for Imbalanced Data of Covid-19 基于少数派类敏感分割准则的新冠肺炎不平衡数据改进Mgini决策树
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-01-01 DOI: 10.6688/jise.202109_37(5).0008
Pratik A. Barot, H. Jethva
In the time of COVID-19, medical facilities struggling to fight against the pandemic. Most of the countries face a tough time fighting against this virus outbreak. Even developed countries are struggling to deal with this virus outbreak. Common problem countries face is a lack of medical staff and medical equipment. Machine learning has the potential to play an important role in a different area of medical facilities. With the help of the machine learning model, an effective diagnostic tool can be built which helps in the time of scarcity of medical staff. However medical data is imbalanced and this skew nature of data prevent machine learning algorithm from achieving high accuracy. To deal with this problem of imbalanced data, we proposed a modified decision tree algorithm that uses a minority sensitive Gini index called Mgini. In an imbalanced dataset of COVID-19, it is important to focus on the reduction of overall misclassification cost instead of trying improvement in accuracy value. Mgini is useful splitting criteria when the misclassification cost of the minority sample is huge as compared to the majority class. The use of this proposed new Gini index as a splitting criterion in the decision tree reduces the misclassification cost. Mgini based decision tree has higher accuracy and low misclassification cost as compare to the traditional Gini index based CART algorithm. Our proposed cost-sensitive approach improves imbalanced data classification without the use of data level sampling techniques.
在2019冠状病毒病期间,医疗机构正在努力抗击疫情。大多数国家都面临着抗击这一病毒爆发的艰难时期。即使是发达国家也在努力应对这次病毒爆发。各国面临的共同问题是缺乏医务人员和医疗设备。机器学习有可能在医疗设施的不同领域发挥重要作用。在机器学习模型的帮助下,可以建立一个有效的诊断工具,在医护人员短缺的情况下提供帮助。然而,医疗数据是不平衡的,这种数据的偏倚性阻碍了机器学习算法实现高精度。为了解决这一数据不平衡问题,我们提出了一种改进的决策树算法,该算法使用少数群体敏感的基尼指数Mgini。在不平衡的COVID-19数据集中,更重要的是关注总体误分类成本的降低,而不是试图提高准确率值。当少数样本的错误分类成本比多数样本大时,Mgini是有用的分割标准。将提出的新基尼系数作为决策树的分割标准,降低了错误分类的代价。与传统的基于Gini指数的CART算法相比,基于Mgini的决策树具有更高的准确率和更低的误分类代价。我们提出的成本敏感方法在不使用数据级抽样技术的情况下改进了不平衡数据分类。
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引用次数: 1
Anti-Spoofing of Live Face Authentication on Smartphone 智能手机实时人脸认证的防欺骗研究
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-01-01 DOI: 10.6688/JISE.20210537(3).0007
Tz-Chia Tseng, Teng-Fu Shih, C. Fuh
Our proposed method is capable of authenticating the input image is from real user or spoofing attack, including paper photograph, digital photograph, and video, using only the Red, Green, Blue (RGB) frontal camera of common smart phone, without the help of depth camera or infrared thermal sensor. We first capture live faces in each frame of input video streams by single shot multi-box detector then feed into our designed convolution neural network after certain data augmentation and finally obtain a well-trained spoof face classifier. Finally, we compared to Parkin and Grinchuk’s results, using dataset CASIASURF[1], and compare the result of vgg16, InceptionNet, ResNet, DenseNet and MobileNet in CASIA-SURFT dataset.
该方法仅使用普通智能手机的RGB (Red, Green, Blue)前置摄像头,无需深度摄像头或红外热传感器,即可验证输入图像是否来自真实用户或欺骗攻击,包括纸质照片、数码照片和视频。我们首先通过单镜头多盒检测器捕获输入视频流中每帧的实时人脸,然后经过一定的数据增强后输入到我们设计的卷积神经网络中,最终得到训练良好的欺骗人脸分类器。最后,我们比较了Parkin和Grinchuk的结果,使用数据集CASIASURF[1],并比较了CASIA-SURFT数据集中的vgg16、InceptionNet、ResNet、DenseNet和MobileNet的结果。
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引用次数: 0
Deep Neural Network for Covid-19 Pandemic Recognition Using CT Data 基于CT数据的深度神经网络Covid-19大流行识别
IF 1.1 4区 计算机科学 Q2 Social Sciences Pub Date : 2021-01-01 DOI: 10.6688/jise.202109_37(5).0007
A. B. Slama, Hanene Sahli, Abderrazek Zeraii, Hedi Trabelsi, L. Farhat, S. Labidi, M. Sayadi
Covid-19 pandemic detection is the key to health safety and coronavirus prevention. Due to the complex changes in CT scan treatment, it is difficult to identify the Covid-19 in the lung image. According to the latest clinical research, an automated fast framework is still required to resolve error prone problem from the pandemic assessment and Covid19 patients screening during this critical control period. Computer aided methods can be very useful in this regard. They are suitable to estimate the infected lung boundary based on elliptical Hough transform with reduced time processing. In this paper, we propose to use a computerized approach to show that the deep neural network (DNN) is a distinctive method to classify Covid-19 pandemic. Experimental results on various lung CT scan images of different Covid-19 patients, demonstrate the effectiveness of the proposed methodology when compared to the manual scoring of pathological experts. According to the performance evaluation, we recorded more than 92% for accuracy of infection detected in ROI scoring over the truths provided by experienced radiologists. Comparative automatic studies are performed to demonstrate the suitability of the proposed technique over other advanced techniques from the literature.
Covid-19大流行检测是健康安全和冠状病毒预防的关键。由于CT扫描治疗的复杂变化,很难在肺部图像中识别Covid-19。根据最新的临床研究,在这个关键的控制时期,仍然需要一个自动化的快速框架来解决大流行评估和covid - 19患者筛查中的容易出错的问题。计算机辅助方法在这方面非常有用。它们适用于基于椭圆霍夫变换的感染肺边界估计,并减少了时间处理。在本文中,我们建议使用计算机化的方法来证明深度神经网络(DNN)是一种独特的方法来分类Covid-19大流行。在不同的Covid-19患者的各种肺部CT扫描图像上的实验结果表明,与病理专家的手动评分相比,所提出的方法是有效的。根据绩效评估,我们在ROI评分中检测到的感染准确率超过了经验丰富的放射科医生提供的真相的92%。进行比较自动研究,以证明所提出的技术优于文献中其他先进技术的适用性。
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引用次数: 1
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