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Using Co-Processors to Activate Real Time Capabilities on Fog Nodes 使用协处理器激活雾节点上的实时功能
I. Ungurean
Fog computing is a concept integrated in the Internet of Things (IoT) that uses advanced embedded devices, called fog nodes, in order to bring cloud services such as processing, storage and communication closer to the place where data are produced. In this paper, it is proposed an architecture for a fog node that activates the Internet of Things for the devices form industrial environment (Industrial Internet of Things - IIoT) by integrating a set of fieldbuses, such as EtherCAT, Profinet, Modbus TCP/IP, Modbus RTU, CANOpen, and Profibus. An open-source implementation of the DDS middleware protocol is used to interconnect the fog nodes. Furthermore, the fog node will meet the requirements in terms of real time, data security and integrity, latency and response time to external events. The fog node is designed and developed on an embedded device with Sitara™ AM335X processor that includes dual cores PRU-ICSS for industrial protocol. These coprocessors allow the development of application that must meet hard real time requirements.
雾计算是集成在物联网(IoT)中的一个概念,它使用称为雾节点的先进嵌入式设备,以便将处理、存储和通信等云服务更接近数据产生的地方。本文提出了一种雾节点架构,通过集成EtherCAT、Profinet、Modbus TCP/IP、Modbus RTU、CANOpen和Profibus等现场总线,激活工业环境中设备的物联网(industrial Internet of Things - IIoT)。使用DDS中间件协议的开源实现来互连雾节点。此外,雾节点将满足实时性、数据安全性和完整性、延迟和对外部事件的响应时间等方面的要求。雾节点是在内置Sitara™AM335X处理器的嵌入式设备上设计和开发的,该处理器包括用于工业协议的双核PRU-ICSS。这些协处理器允许开发必须满足硬实时性要求的应用程序。
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引用次数: 2
Case Studies for the Establishment of the Optimized Smart Factory with Small and Medium-Sized Enterprises 中小企业建立优化智能工厂的案例研究
Jin-uk Jung, K. Jin
In South Korea, Manufacturing Innovation 3.0 Strategy is now underway by the government since 2014. The core of this strategy is to change the existing 20,000 factories to smart factories by 2022. For this, the Korea Government established Korea Smart Factory Foundation and has being investing a large finance for the purpose of the smart factory's proliferation. As a result of this, the government expects that there will build the foundation to enable the advanced smart factory based on Internet of Things, Big Data, and Artificial Intelligence. Despite these efforts, the companies are still hesitant the construction of the smart factory because of the additional expenses caused by the construction of ICT infrastructure and the employment of ICT human resources. On the other hand, they knows the merits of the smart factory and wants some services supported by that, such as the quality test, the aggregation of the actual production, the manufacturing facility maintenance, etc. That is, the underfinanced companies requires the smart factory optimized for their works. The important point to notice is that the implementation of the smart factory can be different according to the factory environments, a type of the manufacturing facility, and data to be collected, even if the companies want same service. Moreover, because every company has its own requirements, it is necessary to design factory-optimized smart factory. Therefore, a smart factory designer must consider and analyse the requirements of company and characteristics of the factory. In this paper, we first describe the four considerations for the establishment of the smart factory in the small and medium enterprises and introduce three case studies in conjunction with the small and medium-sized enterprises that require the smart factory optimized for their business or factory rather than the high-level smart factory.
从2014年开始,韩国政府正在推进“制造业创新3.0战略”。该战略的核心是到2022年将现有的2万家工厂转变为智能工厂。为此,韩国政府成立了韩国智能工厂财团,并为智能工厂的扩散投入了大量资金。因此,政府期待以此为基础,构筑以物联网(iot)、大数据、人工智能(ai)为基础的先进智能工厂。尽管做出了这些努力,但由于ICT基础设施的建设和ICT人力资源的雇佣所带来的额外费用,公司仍然对智能工厂的建设犹豫不决。另一方面,他们知道智能工厂的优点,并希望得到一些服务的支持,如质量测试、实际生产的聚合、制造设施维护等。也就是说,资金不足的公司需要为他们的工作优化的智能工厂。需要注意的重要一点是,即使公司需要相同的服务,智能工厂的实现也可以根据工厂环境、制造设施类型和要收集的数据而有所不同。此外,由于每个公司都有自己的需求,因此有必要设计工厂优化的智能工厂。因此,智能工厂设计师必须考虑和分析企业的需求和工厂的特点。在本文中,我们首先描述了在中小型企业中建立智能工厂的四个考虑因素,并结合中小型企业介绍了三个案例研究,这些中小型企业需要为其业务或工厂优化智能工厂,而不是高级智能工厂。
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引用次数: 6
Sustainable Design and Software Tools by Multimatrix Criteria 可持续设计和软件工具的多矩阵标准
D. Francese, Luca Buoninconti
Architecture design has been for long time relying on graphic drawings and handmade calculations. The results of this procedure was surely an arts and craft product, which very often could not be reproduced or even built in an easy way. Lately, according to the new Computer Aided Systems, many problems - arisen from the impossibility of taking under control various factors - have been solved and a new world of representation, design and construction were born. In the CITTAM (a research centre of the University of Naples) a new methodology has been studied and developed by a team of experts in various disciplines. The methodology, applied to any scale of product, from a small component of a window, until a large urban area, takes into account indicators, parameters and performances of a great number of issues, aimed at assessing the level of sustainability of the product, employed in the construction. This Model, by shape of Multicriteria Matrix, is being processed firstly by means of a structure of Excel sheets, and is now been implementing into a Computer Software, which could help the designers ex-ante, ongoing and after the design procedure and the building construction, in order to allow them to take decisions regarding the choice of materials, shapes, volumes, location, orientation, etc. of the final product. The paper describes the Model and the potential of the innovative Software for assessing sustainability of products, by showing both the structure of the Matrix and the Information Technology. The results, provided by an example of use for a design procedure, demonstrate the usefulness of the tool. In conclusion this new methodology of design and production, by means of Multicriteria Information Tools can help to give again some arts and craft quality to building and architecture, at the same time allowing guarantee of sustainability.
长期以来,建筑设计一直依赖于图形绘图和手工计算。这一过程的结果肯定是一种艺术和工艺产品,通常无法复制,甚至无法以简单的方式制造。最近,根据新的计算机辅助系统,由于无法控制各种因素而产生的许多问题已经解决,一个新的表现,设计和建造世界诞生了。在CITTAM(那不勒斯大学的一个研究中心),一组来自不同学科的专家研究和开发了一种新的方法。该方法适用于任何规模的产品,从窗口的小部件到大型城市地区,考虑到许多问题的指标、参数和性能,旨在评估建筑中使用的产品的可持续性水平。这个模型,通过多标准矩阵的形状,首先通过Excel表格的结构进行处理,现在已经实现到一个计算机软件中,它可以帮助设计师在设计过程和建筑施工之前,进行中和之后,以允许他们对最终产品的材料,形状,体积,位置,方向等的选择做出决定。本文通过展示矩阵和信息技术的结构,描述了评估产品可持续性的模型和创新软件的潜力。通过一个设计过程的使用实例,证明了该工具的实用性。总之,通过多标准信息工具,这种新的设计和生产方法可以帮助再次赋予建筑和建筑一些艺术和工艺质量,同时保证可持续性。
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引用次数: 0
Spatio-temporal Anomaly Detection in Traffic Data 交通数据的时空异常检测
Qing Wang, Weifeng Lv, Bowen Du
Spatio-temporal data mining has received much attention in recent years in many industrial and financial applications. Anomaly detection has also become an important problem. The detection of anomalies in spatio-temporal traffic data is an important problem in the data mining and knowledge discovery community. In this paper, we first investigate multiple types of traffic data and extract different features from each type of the data. Then, we combine grid partition on the basis of Local Outlier Factor (LOF) algorithm and develop a grid-based LOF algorithm to detect the abnormal area in Beijing. Finally, we conduct extensive experiments on real-world trip data including taxi and bus data. And experimental demonstrate the effectiveness of our proposed approach.
近年来,时空数据挖掘在许多工业和金融应用中受到了广泛的关注。异常检测也成为一个重要的问题。时空交通数据的异常检测是数据挖掘和知识发现领域的一个重要问题。本文首先研究了多种类型的交通数据,并从每种类型的数据中提取不同的特征。然后,在局部离群因子(LOF)算法的基础上结合网格划分,提出了一种基于网格的LOF算法来检测北京地区的异常区域。最后,我们对包括出租车和公交车数据在内的真实旅行数据进行了广泛的实验。实验证明了该方法的有效性。
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引用次数: 7
Assessment of Sub-synchronous Resonance Analysis Techniques in Series Compensated Line 串联补偿线路次同步谐振分析技术评价
Ezgi Ünverdi Ağlar, A. Çapar, A. Arsoy
Series compensation of transmission lines is essential for power systems transfer capability enhancement, reactive power equipment and steady-state voltage stability in power systems. However, it leads to increase the risk of sub-synchronous resonance. Sub-synchronous resonance is one of the most critical issue to power system stability which can be described as general oscillation problem at one or more frequency below synchronous frequency. Frequency scanning technique, eigenvalue analysis technique and electromagnetic transient analysis technique are frequently used in the literature for the purpose of analysis sub-synchronous resonance in power systems. In this paper, Using IEEE first benchmark model (FBM), the susceptibility of the system to the SSR is investigated by the eigenvalue technique and electromagnetic transient analysis technique. PSCAD/EMTDC tools is used for electromagnetic transient analysis technique. Furthermore, the susceptibilities of the system are compared for different compensation levels in this study.
输电线路串联补偿对提高电力系统的传输能力、无功设备和稳定电力系统的电压具有重要意义。然而,它会导致次同步共振的风险增加。次同步谐振是影响电力系统稳定性的关键问题之一,它可以被描述为低于同步频率的一个或多个频率的一般振荡问题。频率扫描技术、特征值分析技术和电磁暂态分析技术是文献中常用的分析电力系统次同步谐振的方法。本文采用IEEE第一基准模型(FBM),利用特征值技术和电磁暂态分析技术研究了系统对SSR的敏感性。采用PSCAD/EMTDC工具进行电磁瞬变分析技术。此外,本研究还比较了不同补偿水平下系统的敏感性。
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引用次数: 0
Make it and Break it: An IoT Smart Home Testbed Case Study 创造和打破它:物联网智能家居测试平台案例研究
M. Yamin, Basel Katt, Espen Torseth, V. Gkioulos, S. Kowalski
Education in the information security domain increasingly integrates practical hands-on training; where exercises focusing on secure cyber operations and secure software development are used for training the participants in designing and building secure systems. These exercises utilize multiple approaches in their context, such as capture the flag, attack/defense, reverse engineering, and incident response, while they are conducted on specifically created testbeds that by design integrate vulnerabilities to support the training scenarios. However, these exercises represent only the perspective of the attacker and/or the defender, without reflecting the perspective of the designer, while they statistically have primary focus on network security. In this article, we argue that the best way to understand the consequences of insecure design and development is to combine engineering and exploitation activities in one exercise, proposing the use of "Make it and break it" type of exercises for security training in cyber physical systems. Accordingly, we conducted a case study for validation and verification, the results of which are presented in this article. The case study was performed over the period of two days, during the training boot camp of the Norwegian national team for the European cyber security challenge 2018. During the boot camp, the team has been separated into two groups, which were challenged to design and build an IoT (Internet of Things) smart home using secure design principles, and then attack each other in order to identify security weaknesses. Pre and post-exercise surveys have been conducted, and the feedback from the participants was used in order to evaluate the effectiveness of the exercise, as a pilot towards further development and optimization.
信息安全领域的教育越来越多地整合了实际操作培训;以安全网络操作和安全软件开发为重点的练习,用于培训参与者设计和构建安全系统。这些练习在其上下文中利用多种方法,例如捕获标志、攻击/防御、逆向工程和事件响应,而它们是在专门创建的测试台上进行的,这些测试台上通过设计集成漏洞来支持训练场景。然而,这些练习只代表了攻击者和/或防御者的观点,而没有反映设计者的观点,而它们在统计上主要关注网络安全。在本文中,我们认为理解不安全设计和开发的后果的最佳方法是将工程和开发活动结合在一个练习中,建议在网络物理系统的安全培训中使用“制造和破坏”类型的练习。因此,我们进行了一个验证和验证的案例研究,其结果将在本文中给出。该案例研究在挪威国家队参加2018年欧洲网络安全挑战训练营期间进行了为期两天的研究。在训练营期间,团队被分成两组,他们的挑战是使用安全设计原则设计和构建IoT(物联网)智能家居,然后相互攻击以识别安全弱点。我们进行了运动前和运动后的调查,并利用参与者的反馈来评估运动的有效性,作为进一步发展和优化的试点。
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引用次数: 13
Development of 2 DOF Truck's Suspension Seat for Improving Ride Comfort 提高乘坐舒适性的二自由度卡车悬架座椅的研制
Pornporm Boonporm, Kriattisak Houdjaroen, Chackapong Panchomphu
Besides the driver and passenger's ride comfort, health harmfulness from oscillation motion must be taken into consideration, especially the drivers who work daily 9-hours long terms like in trucks. The unwanted vibration transmitted from unpredicted road roughness and some disturbance via the chassis and seat to human caused the injury. Generally the passive seats amplified vibration at low frequency between its resonance. For this reasons, we proposed and developed the active seat suspension to reduce the vertical acceleration. The problem was firstly identified via the vibration investigation and field measurement. We have also found that the seat pitch angle and pitch rate disturb the driver is aspect of ride comfort. The two degree of freedom driver seat model in vertical direction and pitch angle were demonstrated with assuming small displacement and pitch model. The equivalent spring stiffness and damping coefficient was preliminary estimated around the operation point. Due to the system nonlinearity between the operating ranges, the FLC was developed together with the optimal index, simulated via Matlab/Sumulink. The results figured out that the proposed controllers are effective in attenuating the vertical acceleration at driver seat. The weight root mean square vertical acceleration must follow the comfort range following ISO 2631-1 as well as the pitch rate amplitude were remarkably reduced.
除了驾驶员和乘客的乘坐舒适性外,必须考虑振荡运动对健康的危害,特别是像卡车这样每天长时间工作9小时的驾驶员。意想不到的路面粗糙度和一些干扰通过底盘和座椅传递给人的不必要的振动造成了伤害。一般情况下,被动式座椅在其共振之间会放大低频振动。出于这个原因,我们提出并开发了主动座椅悬架来减少垂直加速度。首先通过振动调查和现场测量确定了该问题。我们还发现,座椅俯仰角和俯仰角对驾驶员的乘坐舒适性也有影响。在假设小位移和俯仰模型的情况下,建立了垂直方向和俯仰角两自由度驾驶员座椅模型。初步估算了工作点附近的等效弹簧刚度和阻尼系数。由于系统在工作范围之间存在非线性,因此将FLC与最优指标一起开发,并通过Matlab/Sumulink进行仿真。结果表明,所设计的控制器能够有效地衰减驾驶员座位处的垂直加速度。重量均方根垂直加速度必须遵循ISO 2631-1的舒适范围以及俯仰率幅度明显降低。
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引用次数: 1
A Live Teaching Platform for Power Line Inspection with a First-Person-View-Based Unmanned Aerial Vehicle 基于第一人称视角的无人机电力线巡检实时教学平台
Haoran Zheng, Xiao Su, Zikai Zhou, Yuqing Lin
In this paper, aiming to fullfill the sharp increasing demand of training for power line inspectors, a set of live broadcast teaching platform based on FPV operating system is researched and designed. Through the introduction of three-dimensional imaging technology and head movement tracking technology, the scene of inspection teaching becomes more immersive and interactive. The platform cannot only reduce the difficulty of inspection teaching, but also help the trainees acquire a better understanding of the standard steps for detecting common faults. At the same time, the platform has broken through the restriction of time and space for inspection teaching. With some experiments, the live teaching platform can work efficiently under the circumstance of 110kV voltage level and a distance of 1.7m from power lines.
本文针对日益增长的电力线检验员培训需求,研究设计了一套基于FPV操作系统的现场直播教学平台。通过三维成像技术和头部运动跟踪技术的引入,使考察教学的场景更具沉浸感和互动性。该平台不仅降低了检测教学的难度,还帮助学员更好地了解常见故障检测的标准步骤。同时,该平台突破了考察教学的时间和空间限制。经实验证明,该现场教学平台在110kV电压等级、距离电力线1.7m的情况下能够高效工作。
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引用次数: 0
An Overview of Prevention/Mitigation against Memory Corruption Attack 对内存损坏攻击的预防/缓解概述
Mahmood Khalsan, Michael Opoku Agyeman
One of the most prevalent, ancient and devastating vulnerabilities which is increasing rapidly is Memory corruption. It is a vulnerability where a memory location contents of a computer system are altered because of programming errors allowing execution of arbitrary codes. It particularly happens in low-level programming languages such as C, C++ because of their lack of memory safety. Many defend techniques against this kind of attacks have been presented and implemented to prevent it. However, an advanced version of the attack can bypass some of these techniques and harm the system. In this work, we present an overview of the Memory corruption attacks and the existing mitigation techniques for both compilers and operating systems. We hope that this survey will provide sufficient details that can be useful for researchers and system designer.
记忆损坏是最普遍、最古老、最具破坏性的漏洞之一,而且正在迅速增加。这是一种漏洞,由于允许执行任意代码的编程错误,计算机系统的内存位置内容被改变。这种情况尤其发生在C、c++等低级编程语言中,因为它们缺乏内存安全性。许多针对此类攻击的防御技术已经提出并实现以防止它。然而,攻击的高级版本可以绕过其中一些技术并损害系统。在这项工作中,我们概述了内存损坏攻击以及针对编译器和操作系统的现有缓解技术。我们希望这项调查将提供足够的细节,可以为研究人员和系统设计者有用。
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引用次数: 4
Influence of Hydrate Moisture on the Sealing of a Nanopowder Dispersed System Based on Zirconia 水合物水分对氧化锆纳米粉体分散体系密封性的影响
A. Shylo, A. Doroshkevich, T. Konstantinova, I. Danilenko, A. Lyubchyk
The present paper is devoted to the problem of sealing zirconia nanopowder. We studied the effect of the water content in zirconia nanopowder on the process of sealing this powder. We found that the shrinkage, specific surface area and weight loss of a nanopowder system based on zirconia during sealing substantially depend from the level of ambient humidity where nanopowder is placed. By optimizing the external conditions of moisture content in a sample, the value of relative shrinkage of a nanopowder system based on ZrO2 under uniaxial pressure can be increased to 6%, while under high hydrostatic pressure sealing it can be increased up to 8%.
本文主要研究了纳米氧化锆粉体的密封问题。研究了氧化锆纳米粉中含水量对其密封过程的影响。我们发现,密封过程中基于氧化锆的纳米粉末系统的收缩率、比表面积和重量损失在很大程度上取决于纳米粉末放置的环境湿度水平。通过优化样品含水量的外部条件,ZrO2纳米粉体体系在单轴压力下的相对收缩率可提高到6%,在高静水压力密封下的相对收缩率可提高到8%。
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引用次数: 0
期刊
Proceedings of the 2nd International Symposium on Computer Science and Intelligent Control
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