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IEEE EUROCON 2017 -17th International Conference on Smart Technologies最新文献

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Cooperative driver stress sensing integration with eCall system for improved road safety 驾驶员压力感应与eCall系统集成,提高道路安全
Pub Date : 2017-07-06 DOI: 10.1109/EUROCON.2017.8011238
Margarida Urbano, Muhammad Alam, J. Ferreira, J. Fonseca, Paulo Simioes
Understanding drivers' behavior under various challenging situations, to avoid accidents, is considered a key research area in the field of safety for Intelligent Transportation System (ITS). Various events (stressors) occurring while driving vehicles may negatively impact drivers' ability to detect and react to unpredictable incident that can possibly cause accidents. A cooperative stress detection system, in which drivers stress levels are continuously monitored and anonymously disseminated to other vehicles and to roadside units (RSUs), may contribute to the early detection of potentially dangerous situations and road's critical sections, thus increasing road safety. Therefore, this paper presents an experimental assessment on the feasibility of such visionary system. For this purpose, we estimate the driver emotional state relying on previously identified user emotional profiles and stress modeling techniques. The envisioned cooperative stress detection system is integrated with eCall system and vehicular communications based on the IEEE 802.11p/ETSI ITS G5, to communicate with on-board units (OBU) of other vehicles and roadside units (RSU). The eCall system is mainly used to inform the public health authorities and ensure on-time medical assistance. Real-world tests, consisting six drivers and two different cities, are performed to validate the functionality of the proposed system.
了解驾驶员在各种挑战情况下的行为,以避免事故发生,是智能交通系统安全领域的一个重要研究方向。驾驶车辆时发生的各种事件(压力源)可能会对驾驶员检测和应对可能导致事故的不可预测事件的能力产生负面影响。合作压力检测系统可以持续监测驾驶员的压力水平,并匿名向其他车辆和路边单位(rsu)传播,这可能有助于及早发现潜在的危险情况和道路的关键路段,从而提高道路安全。因此,本文对该视觉系统的可行性进行了实验评估。为此,我们根据先前确定的用户情绪概况和压力建模技术来估计驾驶员的情绪状态。设想中的协同应力检测系统与eCall系统和基于IEEE 802.11p/ETSI ITS G5的车载通信集成在一起,与其他车辆的车载单元(OBU)和路边单元(RSU)进行通信。呼叫系统主要用于通知公共卫生当局并确保及时的医疗援助。为了验证该系统的功能,我们在两个不同的城市进行了六名司机的实际测试。
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引用次数: 14
Optimal and sub-optimal iterative cross-layer energy efficient schemes for CR MIMO systems with antenna selection 带天线选择的CR MIMO系统的最优和次最优迭代跨层节能方案
Pub Date : 2017-07-06 DOI: 10.1109/EUROCON.2017.8011078
E. M. Okumu, M. Dlodlo
In this paper, energy efficient transmit antenna selection in underlay cognitive radio (CR) multiple-input multiple-output (MIMO) systems from a cross layer perspective, is investigated. Conventional energy efficient antenna selection optimizes an energy efficiency (EE) metric defined in terms of the system capacity and energy consumption, making it a physical layer criterion. In this work, we propose an EE metric that is defined in terms of the system throughput and energy consumption. Throughput considers characteristics from the data link and physical layers, making the proposed EE metric a cross layer quantity. The subset of transmit antennas that maximizes the proposed EE criterion, subject to interference constraints at the primary user receiver (PU RX), is selected. Additionally, the proposed algorithm optimizes the EE by adapting the number of active transmit antennas and transmit power, under a spectral efficiency constraint. A sub-optimal reduced complexity iterative algorithm is also developed. Simulation results show that the cross layer approach results in overall improved system performance, measured in terms of throughput, packet error rate and transmit power, as compared to conventional energy efficient antenna selection.
本文从跨层的角度研究了底层认知无线电(CR)多输入多输出(MIMO)系统中节能发射天线的选择问题。传统的节能天线选择优化了根据系统容量和能耗定义的能效(EE)指标,使其成为物理层标准。在这项工作中,我们提出了一个根据系统吞吐量和能耗定义的EE度量。吞吐量考虑了数据链路和物理层的特征,使提议的EE度量成为跨层数量。在受主用户接收机(PU RX)干扰约束的情况下,选择使所提出的EE标准最大化的发射天线子集。此外,该算法在频谱效率约束下,通过调整有源发射天线数和发射功率来优化EE。提出了一种次优降复杂度迭代算法。仿真结果表明,与传统的节能天线选择相比,跨层方法在吞吐量、分组错误率和发射功率方面总体上提高了系统性能。
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引用次数: 3
Wideband complementary CMOS VCO with capacitive-source-degeneration technique 采用电容源退化技术的宽带互补CMOS压控振荡器
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011121
M. Wei, R. Negra, Sheng-Fuh Chang, Chih-Sheng Chen
This paper demonstrates a wideband complementary LC-VCO using capacitive-source-degeneration (CSD) technique for WiFi and LTE applications. A cross-coupling pair is required to generate suitable-gm but the parasitic capacitance of the pair leads to a reduction of capacitance ratio of varactors and thus, tuning range of a VCO. Properly designing source-degeneration capacitance can relieve this reduction and optimum capacitance is discussed in this paper. The chip is fabricated in 180 nm CMOS and has a chip area of 0.43 mm2. The measured oscillation frequency is from 2.22 GHz to 2.94 GHz (27.9 %) and the lowest phase noise is −122.5 dBc/Hz at 1MHz offset at 2.87 GHz. The core power dissipation is 3.6 mW from a supply voltage of 1.8 V and FOM of −186 dBc/Hz is achieved.
本文演示了一种宽带互补LC-VCO,使用电容源退化(CSD)技术用于WiFi和LTE应用。交叉耦合对需要产生合适的耦合,但耦合对的寄生电容导致变容管的电容比减小,从而降低了压控振荡器的调谐范围。合理设计源退化电容可以缓解这种衰减,并对最佳电容进行了讨论。该芯片采用180nm CMOS工艺制造,芯片面积为0.43 mm2。测量的振荡频率范围为2.22 ~ 2.94 GHz(27.9%),在2.87 GHz的1MHz偏移处,最低相位噪声为- 122.5 dBc/Hz。电源电压为1.8 V时,核心功耗为3.6 mW, FOM为−186 dBc/Hz。
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引用次数: 3
Improved jamming resistance using electronically steerable parasitic antenna radiator 利用电子控制的寄生天线散热器提高抗干扰能力
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011161
M. Tarkowski, M. Rzymowski, L. Kulas, K. Nyka
This paper presents an idea of using an Electronically Steerable Parasitic Antenna Radiator (ESPAR) for jamming suppression in IEEE 802.11b networks. Jamming (intentional interference) attacks are known to be effective and easy to perform, which may impose connectivity problems in applications concerning Internet of Things (IoT). In our paper, theoretical considerations are presented and the results of experiments performed in anechoic chamber are examined. During the test, IEEE 802.11b standard was used to provide communication between transmitter and receiver, and Software Defined Radio (SDR) device, which was used as a source of an intentional interference (jammer). The results showed that connectivity during jamming attack can be improved by using switched-beam antenna enhancing system's bandwidth.
本文提出了在IEEE 802.11b网络中使用电子可控寄生天线辐射器(ESPAR)抑制干扰的想法。众所周知,干扰(故意干扰)攻击是有效且容易执行的,这可能会给物联网(IoT)应用程序带来连接问题。在本文中,我们提出了理论上的考虑,并检查了在消声室中进行的实验结果。在测试过程中,使用IEEE 802.11b标准提供发射器和接收器之间的通信,并使用软件定义无线电(SDR)设备作为故意干扰源(干扰器)。结果表明,采用开关波束天线可以提高系统带宽,从而改善干扰攻击时的连通性。
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引用次数: 7
Computational approach towards vibrational spectroscopic detection of molecular species relevant to atmospheric chemistry and climate science: The formic acid rotamers 与大气化学和气候科学相关的分子物种振动光谱检测的计算方法:甲酸转子
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011247
B. Koteska, A. Mishev, L. Pejov
A rigorous but still feasible computational approach is implemented that aims to provide a fundamental theoretical basis for an in-depth understanding of vibrational spectroscopic properties of molecular systems relevant to atmospheric chemistry and climate science. The mentioned properties are, on the other hand, crucial in the context of experimental detection of the title molecular species and their noncovalently bonded clusters. Rotamers of formic acid are treated as particular example. Potential energy surface of free formic acid was thoroughly explored at Möller-Plesset perturbation theory level, including corrections up to the second order with a rather flexible basis set for orbital expansion (MP2/6–311++G(3df, 3pd)), as well as employing density functional tight binding approach (DFTB). Anharmonic O-H(D) stretching vibrational frequencies were calculated using several algorithms. It was found that MP2 level of theory leads to excellent agreement between theory and experiment without using any arbitrary scaling factor when the difference between O-H(D) stretching frequencies in the case of both rotamers is in question. DFTB performs significantly inferior to MP2 with this respect, while reproducing the absolute frequencies of individual rotamers rather well. Fully relaxed HCOH torsional potential was calculated as well and the frequencies of HCOH torsion in the cis- and trans-well were calculated either by solving the torsional Schrödinger equation variationally or by second-order perturbation theory. The agreement between theory and experiment is again excellent in cases when experimental data are available.
本文提出了一种严格但仍然可行的计算方法,旨在为深入了解与大气化学和气候科学相关的分子系统的振动光谱特性提供基本的理论基础。另一方面,上述性质在标题分子物种及其非共价键簇的实验检测中至关重要。甲酸的旋体是一个特殊的例子。在Möller-Plesset微扰理论水平上对游离甲酸的势能面进行了深入的探索,包括用相当灵活的轨道展开基集(MP2/6-311 ++G(3df, 3pd))进行了二阶修正,以及采用密度泛函数紧密结合方法(DFTB)。用几种算法计算了O-H(D)的非调和伸缩振动频率。研究发现,当两个转子的O-H(D)拉伸频率之间的差异存在问题时,理论MP2水平导致理论与实验之间的良好一致性,而无需使用任何任意缩放因子。DFTB表现明显低于MP2在这方面,而再现个别转子的绝对频率相当好。计算了完全松弛的HCOH扭转势,通过变分求解扭转Schrödinger方程或二阶微扰理论计算了顺式和反式井中HCOH扭转的频率。在有实验数据的情况下,理论与实验的一致性也是很好的。
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引用次数: 1
Exposure to electromagnetic fields in the surrounding area of microtomograph for the frequency of 50Hz 暴露于电磁场周围区域的显微层析成像频率为50Hz
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011173
Joanna Michałowska, J. Józwik, Dariusz Mika, A. Krawczyk
Minimizing the level of harmful factors in the workplace is one of the basic tasks in maintaining industrial safety, including health care and work comfort. In this view systematic monitoring of harmful factors level by performing reliable measurements in the workplace is crucial. The method of measuring electromagnetic field (PEM) levels in the workplace of particular machines and devices is standardized so that the measurement results of different machines can be compared. This work presents the PEM around object measurements of microtomograph GE v|tome|xs.
尽量减少工作场所有害因素的水平是维持工业安全的基本任务之一,包括保健和工作舒适。在这个观点中,通过在工作场所进行可靠的测量来系统地监测有害因素的水平是至关重要的。在特定机器和设备的工作场所测量电磁场(PEM)水平的方法是标准化的,以便可以比较不同机器的测量结果。本文介绍了显微层析仪GE v|tome|xs周围物体测量的PEM。
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引用次数: 10
Single phase AC inverter current PR control with auxiliary PI controller for DC current suppression 单相交流逆变器电流PR控制与辅助PI控制器直流电流抑制
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011129
D. Pavković, Pietro Kristovic, M. Hrgetic, Ante Komljenovic, Vinko Uzarevic
This paper presents the design of a current control system for a single-phase grid-tied inverter equipped with a LCL grid-side filter, which is suitable for inverter DC current component suppression. For that purpose, a proportional-resonant (PR) controller of principal harmonic current component has been designed. This is followed by the design of DC current component estimator based on second-order generalized integrator (SOGI) concept, which is used for DC current suppression by means of a dedicated proportional-integral (PI) controller. Both the PR and PI controllers are designed based on the damping optimum criterion, which results in straightforward analytical expressions for controller parameters. The effectiveness of the proposed dual-current controller-based system is verified by means of simulations.
本文设计了一种适用于逆变器直流电流分量抑制的单相并网逆变器电流控制系统,该系统配置了LCL网侧滤波器。为此,设计了一种主谐波电流分量的比例谐振(PR)控制器。然后设计了基于二阶广义积分器(SOGI)概念的直流电流分量估计器,通过专用的比例积分(PI)控制器用于直流电流抑制。PR控制器和PI控制器都是基于阻尼优化准则设计的,从而得到了控制器参数的简单解析表达式。通过仿真验证了该双电流控制器系统的有效性。
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引用次数: 4
A linear time algorithm for rolling binary trees 滚动二叉树的线性时间算法
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011115
George Tanev, Adrijan Božinovski
This paper presents a new, linear algorithm for performing the roll operation on binary trees. Based on the inorder tree traversal, this algorithm has a very simple structure and achieves linear time and space complexity. A detailed analysis of this algorithm is presented, showing how its design contributes to a more streamlined operation and an improved time complexity over the original — and only other known to the authors — binary tree roll algorithm. A practical implementation of both algorithms is benchmarked by counting the minimum and maximum numbers of basic operations, as well as measuring the minimum and maximum amounts of memory space required by the algorithms to run to completion, across all binary tree topologies with progressively increasing numbers of nodes. Results obtained from this empirical analysis quantify the best-and worst-case complexities of both algorithms and show how the improved algorithm outperforms the original one asymptotically, particularly in regards to their time complexity.
本文提出了一种新的对二叉树进行滚动运算的线性算法。该算法基于无序树遍历,结构非常简单,实现了线性的时间和空间复杂度。对该算法进行了详细的分析,展示了它的设计如何有助于更精简的操作和改进的时间复杂度,而不是原始的二叉树滚动算法-作者唯一知道的其他算法。通过计算基本操作的最小和最大数量,以及测量算法运行到完成所需的最小和最大内存空间量,对这两种算法的实际实现进行基准测试,这些算法在所有二叉树拓扑中具有逐渐增加的节点数量。从这一实证分析中获得的结果量化了两种算法的最佳和最坏情况复杂性,并显示了改进算法如何逐渐优于原始算法,特别是在时间复杂性方面。
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引用次数: 1
IoT-based health monitoring via LoRaWAN 通过LoRaWAN进行基于物联网的健康监测
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011165
Afef Mdhaffar, T. Chaari, K. Larbi, M. Jmaiel, Bernd Freisleben
In this paper, we present a new loT-based health monitoring approach in which collected medical sensor data is sent to an analysis module via low-cost, low-power and secure communication links provided by a LoRaWAN network infrastructure. We mainly focus on monitoring blood pressure, glucose and temperature in rural areas where cellular network coverage is either absent or does not allow data transmission. The main objective is to reduce the burden of long trips for people living in these areas to visit healthcare facilities, while minimizing the communication cost. Several experiments have been conducted to evaluate the area covered by the LoRa network and the power consumption of our system. The results indicate that the average area covered is around 33 km2 when the LoRa Gateway is placed outdoor on a 12 meter altitude. Moreover, the results demonstrate that the power consumption of our monitoring system is at least ten times lower than other long range cellular solutions, such as GPRS/3G/4G.
在本文中,我们提出了一种新的基于lot的健康监测方法,其中收集的医疗传感器数据通过LoRaWAN网络基础设施提供的低成本,低功耗和安全的通信链路发送到分析模块。我们主要专注于监测农村地区的血压、血糖和体温,这些地区要么没有蜂窝网络覆盖,要么不允许数据传输。主要目标是减轻生活在这些地区的人们前往医疗机构的长途旅行的负担,同时最大限度地降低通信成本。已经进行了几个实验来评估LoRa网络覆盖的面积和我们系统的功耗。结果表明,在海拔12米的室外,LoRa网关的平均覆盖面积约为33 km2。此外,结果表明,我们的监控系统的功耗比其他远程蜂窝解决方案(如GPRS/3G/4G)至少低十倍。
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引用次数: 110
Cloud based solution for vital signs tracking 基于云的生命体征跟踪解决方案
Pub Date : 2017-07-01 DOI: 10.1109/EUROCON.2017.8011166
V. Rakovic, D. Denkovski, V. Atanasovski, L. Gavrilovska, H. O. D. Akker, Cristian-Dan Bara
eHealth technology can bring a variety of benefits to patients, caregivers, and health institutions, by facilitating improved healthcare services through the utilization of Information and Communication Technologies (ICTs). The forthcoming generation of healthcare services will require advances in computing and Wireless Sensor Networks (WSNs) in order to leverage truly intelligent and adaptive features for smarter eHealth services. This paper proposes a multi-sensory cloud based system capable of monitoring and tracking the patient's behavior with respect to his vital signs. The paper also showcases the proposed system on a real testbed, performing real-time vital signs data acquisition, processing, and monitoring.
电子医疗技术通过利用信息和通信技术(ict)促进改善医疗服务,可以为患者、护理人员和医疗机构带来各种好处。即将到来的一代医疗保健服务将需要在计算和无线传感器网络(wsn)方面取得进步,以便利用真正的智能和自适应功能来实现更智能的电子医疗服务。本文提出了一种基于多感官云的系统,能够监测和跟踪患者的生命体征行为。本文还在一个实际的测试平台上展示了所提出的系统,进行了实时生命体征数据的采集、处理和监测。
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引用次数: 2
期刊
IEEE EUROCON 2017 -17th International Conference on Smart Technologies
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