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2020 22nd International Conference on Advanced Communication Technology (ICACT)最新文献

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Dynamic Weighted Hybrid Recommender Systems 动态加权混合推荐系统
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061465
Hong-Quan Do, T. Le, Byeongnam Yoon
Recommender Systems (RSs) have emerged since the mid-90s for dealing with the problem of information overload. They are commonly defined as software tools and techniques that serve as an assistant providing suggestions to the users. The two most familiar recommendation techniques are probably Collaborative filtering (CF) and Content-based filtering (CBF). Whereas CF computes recommendations based on past ratings of users with similar preferences, CBF assumes that each user operates independently, thus exploits only information derived from item features. Technically speaking, the performance of every single recommendation algorithm is limited and each has its own strengths and weaknesses, so recently more attentions are paid to the hybrid recommendation algorithms. In this work, we focus on the weighted hybridization and rather than using fixed weighted for the combination, we aim to propose a simple method to dynamic weight a combination of CF and CBF. Our experimental results on one of the most popular public datasets in the field of RSs - MovieLens have verified the effectiveness of our strategy against the traditional CF, and CBF approaches. It not only boost the prediction performance, but also alleviate the problem of new item cold start.
推荐系统(RSs)自90年代中期以来出现,用于处理信息过载的问题。它们通常被定义为软件工具和技术,作为向用户提供建议的助手。两种最熟悉的推荐技术可能是协同过滤(CF)和基于内容的过滤(CBF)。CF是基于具有相似偏好的用户过去的评分来计算推荐的,而CBF假设每个用户都是独立操作的,因此只利用来自项目特征的信息。从技术上讲,每一种推荐算法的性能都是有限的,各有优缺点,因此近年来混合推荐算法受到了越来越多的关注。在这项工作中,我们将重点放在加权杂交上,而不是使用固定权重进行组合,我们的目标是提出一种简单的方法来动态加权CF和CBF的组合。我们在RSs领域最流行的公共数据集之一MovieLens上的实验结果验证了我们的策略对传统CF和CBF方法的有效性。它不仅提高了预测性能,而且缓解了新项目冷启动的问题。
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引用次数: 11
Analytic Model of a Mesh Topology based on LoRa Technology 基于LoRa技术的网格拓扑解析模型
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061519
R. Kirichek, V. Vishnevsky, V. Pham, A. Koucheryavy
In the last decade, the Internet of Things (IoT) technologies have brought a lot of applications in different fields. Many communication technologies have been developed in order to connect everything to each other and to the Internet. Besides, the long-range power-efficient wireless technologies have emerged such as LoRa (Long Range), which enables transmission over long distances with low energy consumption and can work within p2p, star or mesh topologies. In this paper, we analyze a model of a mesh topology for the LoRa network, which is attracting more interest in the applications of Smart City and Smart Agriculture. While the mesh topology is described by a graph, a method of route selection is considered based on the link quality related to Received Signal Strength Indication (RSSI) to find the optimal path from a source to a sink node. The network performance is evaluated by considering each node as a queueing system. As the analytic results, the routes are found from device nodes to the gateway, and the delivery latency is analyzed in the dependence on the load intensity and the number of relay nodes.
在过去的十年中,物联网(IoT)技术在不同领域带来了大量的应用。许多通信技术已经被开发出来,以便将所有东西相互连接并连接到互联网上。此外,远程节能无线技术已经出现,如LoRa (Long Range),它可以在p2p,星型或网状拓扑结构中工作,以低能耗进行长距离传输。在本文中,我们分析了LoRa网络的网状拓扑模型,这在智慧城市和智慧农业的应用中引起了越来越多的兴趣。网格拓扑用图来描述,考虑基于与接收信号强度指示(Received Signal Strength Indication, RSSI)相关的链路质量来选择路由的方法,以找到从源节点到汇聚节点的最优路径。通过将每个节点视为一个排队系统来评估网络性能。根据分析结果,找到了设备节点到网关的路由,并从负载强度和中继节点数量的依赖关系分析了发送延迟。
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引用次数: 11
Invited Session 邀请会话
Pub Date : 2020-02-01 DOI: 10.1109/icact.2005.246030
T. Ferreira, E. Barreira
Digital supply chain is a product of long-term evolution in automation, information systems
数字化供应链是自动化、信息系统长期演进的产物
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引用次数: 0
Inspecting Distortion in the Power Amplifiers with the aid of Neural Networks 基于神经网络的功率放大器畸变检测
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061564
Sercan Aygün, Lida Kouhalvandi, E. O. Gunes, S. Ozoguz
This paper aims to classify the distortion behavior of a power amplifier (PA) with the aid of a neural network. Power amplifiers have quite extensive usage in communication systems especially with the current developments on 5G and more. However, distortion in the power amplifiers needs attention to be pre-distorted with the help of a feedback mechanism using direct or indirect methods in the digital domain. In the literature, there are several efforts to understand and reduce distortion in amplifier devices. Therefore, in this paper, the distortion behavior in the power amplifier is inspected using the neural networks. In this work, we have obtained a software-defined network using the strength of the neural network to inspect the distorted and non-distorted data as a binary classification on the actual design of the power amplifier in [1]. For this purpose, a neural network system is trained. In the tests, more than 96% accuracy can easily be obtained in an early epoch with the cleverly chosen learning rate (ŋ) which is optimally outperforming thereabouts after ŋ=0.05 till 0.1. Thus, the linearity and non-linearity response of the PA is considered with the help of the trained network.
本文旨在利用神经网络对功率放大器的失真行为进行分类。功率放大器在通信系统中有着相当广泛的应用,特别是随着5G等技术的发展。然而,需要注意的是,在数字领域,利用直接或间接的方法,利用反馈机制对功率放大器中的失真进行预失真。在文献中,有一些努力来理解和减少放大器器件中的失真。因此,本文采用神经网络对功率放大器的畸变行为进行了检测。在这项工作中,我们利用神经网络的强度获得了一个软件定义的网络,对[1]中功率放大器的实际设计进行畸变和非畸变数据的检测作为二值分类。为此,我们训练一个神经网络系统。在测试中,通过巧妙地选择学习率(k),可以很容易地在早期获得96%以上的准确率,并且在k =0.05到0.1之间表现最佳。因此,在训练网络的帮助下,可以考虑PA的线性和非线性响应。
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引用次数: 3
Implementation of SDR-based 5G NR Cell Search Equipment 基于sdr的5G NR小区搜索设备的实现
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061404
Igor Kim, Jungsun Um, Seungkeun Park
This paper describes an initial implementation of software defined radio (SDR) based 5G new radio (NR) cell search equipment. The proposed equipment is capable of detecting NR cells by decoding synchronization signal block (SSB) transmitted by gNodeBs in the vicinity. A step-by-step implementation of the cell search is given. The measurement results are compared with the results obtained using commercial 5G measurement equipment. The performance results validate that the proposed SDR-based equipment can successfully decode SSB and detect the same cells as the commercial measurement devices.
本文介绍了一种基于软件定义无线电(SDR)的5G新无线电(NR)小区搜索设备的初步实现。该设备能够通过解码附近gndeb传输的同步信号块(SSB)来检测NR单元。给出了单元格搜索的逐步实现。将测量结果与商用5G测量设备的测量结果进行了比较。性能测试结果表明,所提出的基于sdr的设备可以成功解码SSB,并且可以检测到与商用测量设备相同的单元。
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引用次数: 6
Conservation Genetic Algorithm to Solve the E-commerce Environment Logistics Distribution Path Optimization Problem 守恒遗传算法求解电子商务环境下物流配送路径优化问题
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061527
Rui Fu, M. Al-Absi, A. Al-Absi, H. Lee
E-commerce is a business activity that uses modern information technology to process cash flow and logistics to achieve transactions. With the increase of evolutionary algebra, saving genetic algorithm and genetic algorithm all tend to be more optimal. The evolutionary starting point of saving genetic algorithm is much lower than the evolutionary starting point of genetic algorithm. The evolutionary algebra and the population size in the conservation genetic algorithm also have certain influence on the performance of the algorithm. The maximum running distance of the vehicle is different when the trucks have distance limitation and have no-distance limitation. This paper can improve the efficiency of logistics distribution and shorten the distribution distance, which is of great significance for saving logistics costs and improving customer service level.
电子商务是利用现代信息技术处理现金流和物流来实现交易的一种商业活动。随着进化代数的增加,节省遗传算法和遗传算法都趋向于更优。储蓄遗传算法的进化起点远低于遗传算法的进化起点。守恒遗传算法中的进化代数和种群大小对算法的性能也有一定的影响。有距离限制和无距离限制时,车辆的最大行驶距离不同。本文可以提高物流配送效率,缩短配送距离,对于节约物流成本,提高客户服务水平具有重要意义。
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引用次数: 2
Selection and Optimization Model of Key Performance Indicators 关键绩效指标的选择与优化模型
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061560
Nyamsuren Purevsuren, Zolzaya Dashdorj, Tamir Khujuu, Erdenekhuu Norinpel
Big data innovations and development brings opportunities to leverage the impacts of performance metrics on a strategic plan. The purpose of this research work is to study the selection of the performance metrics based on the preferences, and find out what metrics are prioritized in a current strategic plan and how to translate big data insights into meaningful managerial actions. The authors prioritized group commitments and commitment of KPIs in the case study of universities in Mongolia, using the AHP approach for multi-criteria decision makings. Hardcopy questionnaire and interview sessions were used for collecting data to analyse the prioritization results. Based on the prioritization results of strategies, we find that decision-makers strongly prefer strategies with the goals and this preference causes the imbalance of metrics on the dashboard. The prioritization of metrics is highly influenced by the data availability of management reporting. Prioritization of performance metrics are data-driven and bring bottom-up impacts on the dynamics of the strategic plan. The conflicted interests of stakeholders, internal policy, and the excessive amount of metrics make strategic decision makings difficult. The application of AHP in the case study contributes to improving the speed of decision-making processes, providing scientific results on KPIs prioritization and selection, and providing an approach to assess the differences between what strategic planners think and what they execute and prioritize on a practical level. The prioritization of performance metrics is the sustainable approach that can be extended to other strategic decision makings as well, for example prioritizing business model elements or business processes. This research work proves that the multi-criteria decision-making approach AHP can be used to prioritize and identify strategic focus based on selections of the performance metrics. The research also demonstrates the importance of combining bottom-up data-driven analytics with top-down strategy-making processes in big data developments.
大数据的创新和发展为利用绩效指标对战略计划的影响带来了机会。本研究的目的是研究基于偏好的绩效指标的选择,并找出当前战略计划中优先考虑的指标,以及如何将大数据见解转化为有意义的管理行动。作者在蒙古大学的案例研究中优先考虑了群体承诺和kpi承诺,使用AHP方法进行多标准决策。使用纸质问卷和访谈来收集数据,以分析优先级结果。基于战略的优先级排序结果,我们发现决策者强烈倾向于具有目标的战略,这种偏好导致了仪表板上指标的不平衡。度量标准的优先级受到管理报告的数据可用性的高度影响。绩效指标的优先级是数据驱动的,并对战略计划的动态产生自下而上的影响。涉众之间的利益冲突、内部政策和过多的度量标准使得战略决策制定变得困难。AHP在案例研究中的应用有助于提高决策过程的速度,提供kpi优先级和选择的科学结果,并提供一种方法来评估战略规划者在实际层面上的想法与执行和优先级之间的差异。性能指标的优先级排序是一种可持续的方法,也可以扩展到其他战略决策制定中,例如确定业务模型元素或业务流程的优先级。本研究证明了基于绩效指标选择的多准则决策方法AHP可以用于确定战略重点的优先级。该研究还表明,在大数据发展中,自下而上的数据驱动分析与自上而下的战略制定过程相结合的重要性。
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引用次数: 0
Development of Automated Processing for High-Definition Mapping System 高清晰制图自动化处理系统的开发
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061433
Prachaya Daruthep, N. Sutthisangiam
High-Definition (HD) Mapping is a system using Mobile Mapping System (MMS) technique to create HD panoramic point cloud map of the georeferenced location. The process to create the HD maps consists of joint processing of large amount of data originating from various sources. These data go through various post-processing steps using associated software to create a resulting HD point cloud map. To run these processes successfully require an appropriate processing server, a correct flow of processing sequence and validation of the input/output data. These processes are error-prone and time-consuming for human users. This paper is presented to illustrate practicality of an automated processing system for the creation of HD map, which can boost the efficiency of data processing for the whole system.
高清(HD)地图是利用移动地图系统(MMS)技术创建地理参考位置的高清全景点云图的系统。制作高清地图的过程包括对来自不同来源的大量数据进行联合处理。这些数据通过使用相关软件的各种后处理步骤来创建最终的高清点云图。要成功运行这些流程,需要适当的处理服务器、正确的处理序列流和输入/输出数据验证。对于人类用户来说,这些过程容易出错且耗时。本文介绍了一种用于高清晰地图制作的自动化处理系统的实用性,它可以提高整个系统的数据处理效率。
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引用次数: 2
Influence of quality service in IP/MPLS network load with IPTV and VoD services IPTV和VoD业务负载对IP/MPLS网络业务质量的影响
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061257
M. Barry, J. K. Tamgno, C. Lishou
The purpose of this research was to obtain results that clearly show the influence of quality of service in network IP/MPLS load with IPTV and VoD services. Estimating the traffic and the quality of transmission in these networks is a major indication of network performance and thus ensures optimal QoS. Measure quality of service in terms of bandwidth, latency, and jitter and loss rate. The objective of this study is to first set up an IP/MPLS network with installed multimedia services, then study the network behavior in case of congestion and finally ensure the quality of service both in transmission and do the measurement of QoS. We used the DiffServ architecture to deploy QoS and then to measure again de QoS (latency, jitter, loss rate and bandwidth).
本研究的目的是获得清晰显示网络IP/MPLS负载下IPTV和VoD业务对业务质量影响的结果。估计这些网络中的流量和传输质量是网络性能的主要指标,从而确保最优的QoS。从带宽、延迟、抖动和丢包率等方面衡量服务质量。本研究的目的是首先建立一个安装了多媒体业务的IP/MPLS网络,然后研究网络在拥塞情况下的行为,最后保证传输中的服务质量和QoS的测量。我们使用DiffServ架构部署QoS,然后再次测量de QoS(延迟、抖动、损失率和带宽)。
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引用次数: 1
Performance of Packet Analysis between Observer and WireShark 观察者与WireShark的报文分析性能分析
Pub Date : 2020-02-01 DOI: 10.23919/ICACT48636.2020.9061452
Hyunho Kim, Hoonjae Lee, Hyotaek Lim
With the recent development of telecommunication technology, a new technology called IoT (Internet of Things) has attracted attention. The IoT is a technology that connects objects to objects using the internet and it is expected that the age in which a large number of things form a huge network will come. As wireless network technology develops day by day, wireless LAN is being used in the frequency of a 5G network, which is over 2.4G. However, mobile market operators are commercializing using 5G networks. As wireless network technology develops, wireless devices can be connected quickly and more reliably. However, it is still vulnerable to network attacks due to the nature of wireless. Network forensics is needed to analyze and defend against these attacks. Network Forensics refers to a technology that analysis all actions are taken on the network and analysis and responds to attacks through packet analysis. In this paper, we have used software (Wireshark) and hardware (Observer) to collect and analyze the packets. Moreover, to check the performance of our work, we have compared and analyzed each packet collection using Wireshark and Observer respectively.
随着近年来电信技术的发展,一种名为IoT (Internet of Things)的新技术引起了人们的关注。物联网是一种利用互联网将物体与物体连接起来的技术,预计大量物体形成巨大网络的时代将到来。随着无线网络技术的日益发展,无线局域网正在以超过2.4G的5G网络频率使用。然而,移动市场运营商正在使用5G网络进行商用化。随着无线网络技术的发展,无线设备可以快速、可靠地连接。然而,由于无线的特性,它仍然容易受到网络攻击。需要网络取证来分析和防御这些攻击。网络取证是指对网络上发生的所有行为进行分析,并通过报文分析对攻击进行分析和响应的一种技术。在本文中,我们使用软件(Wireshark)和硬件(Observer)对数据包进行收集和分析。此外,为了检查我们工作的性能,我们分别使用Wireshark和Observer对每个数据包收集进行了比较和分析。
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引用次数: 11
期刊
2020 22nd International Conference on Advanced Communication Technology (ICACT)
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