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2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)最新文献

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Polarization controlled emission on gold nanogrooves and nanowires 金纳米沟槽和纳米线的极化控制发射
D. Rajesh, Ziv Glasser, Y. Gorodetski, S. Sternklar, D. Cheskis
The rapid growing interest in the field of plasmonics comes from advance nanotechnologies involving nanophotonics applications. The surface plasmon polaritons (SPP) exited by light on metallic nano grooves arrays (NGA) and nanowires (NWs), play a role of an intermediary between photonics and electronics. We report on the experimental demonstration of polarization controlled SPP propagation, leading to tailored directional coupling in a periodic plasmonic NGAs and NWs. The SPP emission and propagation, in Au NGAs and Au NWs is modulated by the incident light polarization. Our results establish a basis for the developments of innovative optical devices, which are useful in telecommunications and other nanophotonic devices.
等离子体动力学领域快速增长的兴趣来自于涉及纳米光子学应用的先进纳米技术。光在金属纳米沟槽阵列(NGA)和纳米线(NWs)上产生的表面等离子激元极化子(SPP)在光子学和电子学之间起着中介作用。我们报道了偏振控制SPP传播的实验演示,导致周期性等离子体NGAs和NWs的定向耦合。在Au NGAs和Au NWs中,SPP的发射和传播受入射光偏振调制。我们的研究结果为创新光学器件的发展奠定了基础,这在电信和其他纳米光子器件中是有用的。
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引用次数: 0
Segmentation and Analysis of Bird Trill Vocalizations 鸟类颤音发声的分割与分析
Hagai Barmatz, Dana Klein, Y. Vortman, Sivan Toledo, Y. Lavner
Animal communication and specifically acoustic communication is in the focus of ecological and biological research. With the advancement of monitoring technology, a vast amount of acoustic recordings of birds is continuously accumulated. As manual segmentation and annotation of this data is impractical, development of efficient algorithms for accurate detection, classification and segmentation of birdsong is therefore a prerequisite for further analysis. In this study we present an algorithm for automatic segmentation and parameters estimation of one type of bird vocalization, namely, the trill song. The algorithm is based on computing the short-time variance of the fundamental frequency derivative of bird acoustic signal for initial detection of syllables. The boundaries of each syllable are consequently obtained using a Gaussian smoothed short-time energy function and an adaptive threshold based on the energy envelope. The performance of the algorithm was evaluated using a comparison to human expert segmentation, as well as to ground-truth values of synthetic trills produced by the Harmonic + Noise model. A correct detection rate of more than 95% was yielded for SNR levels of -5 dB or higher for signals with additive colored noise, and for signals with additive white Gaussian noise more than 92% was obtained for SNR>-5dB. In addition, a high correlation between the automatic segmentation and that of a human expert was exemplified.
动物交流,特别是声音交流是生态学和生物学研究的重点。随着监测技术的进步,大量鸟类的声音记录不断积累。由于对这些数据进行人工分割和标注是不切实际的,因此开发高效的算法来准确地检测、分类和分割鸟鸣是进一步分析的先决条件。在这项研究中,我们提出了一种算法来自动分割和参数估计一种鸟类发声,即颤音歌。该算法基于计算鸟声信号基频导数的短时方差进行音节的初始检测。然后利用高斯平滑的短时能量函数和基于能量包络的自适应阈值获得每个音节的边界。通过与人类专家分割的比较,以及谐波+噪声模型产生的合成颤音的真值,评估了该算法的性能。对于加性彩色噪声信号信噪比为-5dB及以上的信号,正确率达到95%以上;对于加性高斯白噪声信号,信噪比>-5dB的信号,正确率达到92%以上。此外,还举例说明了自动分割与人类专家分割之间的高度相关性。
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引用次数: 1
Distributed Deep Learning on Wimpy Smartphone Nodes 弱智能手机节点上的分布式深度学习
Tzoof Hemed, Nitai Lavie, R. Kaplan
Deep Neural Networks (DNN), contain multiple convolutional and several fully connected layers, require considerable hardware resources to train in a reasonable time. Multiple CPUs, GPUs or FPGAs are usually combined to reduce the training time of a DNN. However, many individuals or small organizations do not possess the resources to obtain multiple hardware units.The contribution of this work is two-fold. First, we present an implementation of a distributed DNN training system that uses multiple small (wimpy) nodes to accelerate the training process. The nodes are mobile smartphone devices, with variable hardware specifications. All DNN training tasks are performed on the small nodes, coordinated by a centralized server. Second, we propose a novel method to mitigate issues arising from the variability in hardware resources. We demonstrate that the method allows training a DNN to high accuracy on known image recognition datasets with multiple small different nodes. The proposed method factors in the contribution from each node according to its run time on a specific training task, relative to the other nodes. In addition, we discuss practical challenges that arise from small node system and suggest several solutions.
深度神经网络(DNN)包含多个卷积层和多个全连接层,需要大量的硬件资源才能在合理的时间内进行训练。为了减少深度神经网络的训练时间,通常将多个cpu、gpu或fpga组合在一起。然而,许多个人或小型组织并不拥有获得多个硬件单元的资源。这项工作的贡献是双重的。首先,我们提出了一个分布式DNN训练系统的实现,该系统使用多个小(弱)节点来加速训练过程。节点是具有可变硬件规格的移动智能手机设备。所有DNN训练任务都在小节点上执行,由中央服务器协调。其次,我们提出了一种新的方法来缓解硬件资源的可变性所带来的问题。我们证明了该方法可以在具有多个小不同节点的已知图像识别数据集上训练DNN以达到高精度。所提出的方法根据每个节点在特定训练任务上的运行时间来考虑其相对于其他节点的贡献。此外,我们还讨论了小节点系统带来的实际挑战,并提出了一些解决方案。
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引用次数: 1
A Reconfigurable ASIP for 802.11 Packet Detection Algorithm 一种可重构的802.11报文检测算法ASIP
Refael Avez, S. Weiss
With the significant increase of wireless standards in recent years, reconfigurable programmable architectures have started to attract more attention and interest. One of the solutions that has gained more industry-popularity is the Application Specific Instruction-Set (ASIP) Processor, which provides an innovative approach for obtaining flexibility with relatively small increases in area and power. In this article we will present the development of an optimized ASIP that is tailored to the needs of detecting packets based on the 802.11 standard, and uses a retargetable compilation flow. We will present several optimizations that can be used to optimize both the algorithm and the processor model. These enhancements increase the performance by a factor of 20 and decrease significantly the power consumption relative to a 16bit general purpose processor model. While the proposed configurable ASIP was applied to multiple packet detection standards based on OFDM or DSSS modulations such as 802.11a/g/n and 802.11b/1997 respectively, it was verified on an ODFM 802.11a/g/n system. Most of our analysis focuses on OFDM systems, however, it also applies to DSSS systems. In addition, we present a comparison between the proposed ASIP and a dedicated hardware solution over ASIC in terms of performance power and area.
近年来,随着无线标准的显著增加,可重构可编程架构开始引起越来越多的关注和兴趣。应用特定指令集(Application Specific Instruction-Set, ASIP)处理器是在业界获得更多知名度的解决方案之一,它提供了一种创新的方法,可以在相对较小的面积和功耗增加的情况下获得灵活性。在本文中,我们将介绍一个优化的ASIP的开发,该ASIP是针对基于802.11标准检测数据包的需求量身定制的,并使用可重新定位的编译流。我们将介绍几个可用于优化算法和处理器模型的优化。与16位通用处理器模型相比,这些增强功能将性能提高了20倍,并显著降低了功耗。提出的可配置ASIP分别应用于基于OFDM或DSSS调制的多种分组检测标准,如802.11a/g/n和802.11b/1997,并在ODFM 802.11a/g/n系统上进行了验证。我们的大部分分析都集中在OFDM系统上,然而,它也适用于DSSS系统。此外,我们在性能、功耗和面积方面比较了所提出的ASIP和专用硬件解决方案。
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引用次数: 2
Bloch Oscillations of Electrons Dressed with Photons: Theory and Potential Applications in Nanoelectronics 带光子的电子的布洛赫振荡:理论及其在纳米电子学中的潜在应用
I. Levie, G. Slepyan
we present a model of a one-dimensional chain of two-level artificial atoms driven simultaneously with a dc field and a quantum light in the strong coupling regime. It is shown that the entanglement of the electron and photon (dressing of the atoms with light) dramatically changes the scenario of the Bloch oscillations (BO) compared with standard solution of the Bloch-Zener model. We considered the mutual influence of dressing and BO and show that the quantum properties of light become controllable via an adiabatic dc field tuning. The obtained results open new ways in quantum state engineering, nano-photonic spectroscopy and nano-antennas.
我们提出了在强耦合状态下由直流场和量子光同时驱动的二能级人工原子一维链模型。结果表明,与布洛赫-齐纳模型的标准溶液相比,电子和光子的纠缠(原子被光修饰)极大地改变了布洛赫振荡(BO)的情况。我们考虑了修饰和BO的相互影响,并表明光的量子特性通过绝热直流场调谐变得可控。所得结果在量子态工程、纳米光子光谱和纳米天线等领域开辟了新的途径。
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引用次数: 1
Recovery of Signals Encoded by Sample-and-Hold Asynchronous Sigma-Delta Modulation 采样保持异步Sigma-Delta调制编码信号的恢复
D. Rzepka, D. Koscielnik, Jakub Szyduczynski, M. Pawlak, M. Miśkowicz
The paper is focused on methods of the perfect signal recovery based on the frame theory, and the approximate fast reconstruction with truncated Fourier series for inputs encoded by Sample-and-Hold Asynchronous Sigma Delta Modulation (SH-ASDM). The comparative analysis shows that the signal recovery for the SH-ASDM is characterized by significantly lower computational complexity than for the classical ASDM.
重点研究了基于帧理论的信号完美恢复方法,以及截断傅立叶级数对采样保持异步σ δ调制(SH-ASDM)编码输入信号的近似快速重构方法。对比分析表明,SH-ASDM的信号恢复计算复杂度明显低于经典ASDM。
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引用次数: 1
Coding for Noncausal Tracking 为非因果跟踪编码
Robert Graczyk, A. Lapidoth
A source generates a random sequence that is then described to a controller who wishes to employ feedback control on a given finite-state system in order for its output to closely resemble the sequence. The tension between the best achievable expected fidelity and the description length is studied in the asymptotic regime where the length of the sequence tends to infinity, with the description rate held fixed. The solution is the source-coding dual of coding for channels with states.
源生成一个随机序列,然后将其描述给控制器,控制器希望对给定的有限状态系统采用反馈控制,以使其输出与序列非常相似。研究了在序列长度趋于无穷大且描述速率保持不变的渐近状态下,最佳期望保真度与描述长度之间的关系。解决方案是对具有状态的信道进行编码的源编码对偶。
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引用次数: 0
Solving the Capacitated Open Vehicle Routing Problem Algorithm, Based on Probability Distribution Modelling of Saving Matrix 基于保存矩阵概率分布建模的有容开放车辆路径问题求解算法
Uri Lipowezky, Boris Korenfeld, I. Ideses
Same day last-mile parcels delivery services are recently gaining a great deal of attention in the transportation science community. In the Tel Aviv metropolitan area, smart mobility companies provide delivery services for small parcels using scooter fleets. Scooter couriers deliver the parcels from the local post offices to the final customers. Since a scooter has a limited capacity and is paid with respect to the total travelling distance, the problem can be formulated as a Capacitated Open Vehicle Routing Problem (COVRP). The proposed approach is based on the high sparseness of the Clarke-Wright (CW) saving matrix for COVRP in case of parcels delivery from post offices. In this case the CW algorithm can be separated to construction of all feasible Hamiltonian paths at the first phase and its optimal combination by solving maximal weight clique problem (MWCP) at the second phase. Computational results show that the proposed algorithm is competitive, improves known benchmark results on some instances and saves 40–80% of delivery cost in the Tel Aviv metropolitan area.
当天最后一英里包裹递送服务最近在运输科学界引起了极大的关注。在特拉维夫市区,智能移动公司使用踏板车车队为小包裹提供配送服务。摩托车快递员将包裹从当地邮局送到最终客户手中。由于踏板车的通行能力有限,且按行驶总距离付费,因此可以将该问题表述为有能力开放车辆路径问题(COVRP)。提出的方法是基于高稀疏的克拉克-赖特(CW)保存矩阵的COVRP的情况下,包裹从邮局交付。在这种情况下,连续波算法可以分解为在第一阶段构造所有可行的哈密顿路径,并在第二阶段通过求解最大权团问题(MWCP)将其最优组合。计算结果表明,该算法具有一定的竞争力,在某些情况下改进了已知的基准测试结果,在特拉维夫大都市区节省了40-80%的配送成本。
{"title":"Solving the Capacitated Open Vehicle Routing Problem Algorithm, Based on Probability Distribution Modelling of Saving Matrix","authors":"Uri Lipowezky, Boris Korenfeld, I. Ideses","doi":"10.1109/ICSEE.2018.8646014","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646014","url":null,"abstract":"Same day last-mile parcels delivery services are recently gaining a great deal of attention in the transportation science community. In the Tel Aviv metropolitan area, smart mobility companies provide delivery services for small parcels using scooter fleets. Scooter couriers deliver the parcels from the local post offices to the final customers. Since a scooter has a limited capacity and is paid with respect to the total travelling distance, the problem can be formulated as a Capacitated Open Vehicle Routing Problem (COVRP). The proposed approach is based on the high sparseness of the Clarke-Wright (CW) saving matrix for COVRP in case of parcels delivery from post offices. In this case the CW algorithm can be separated to construction of all feasible Hamiltonian paths at the first phase and its optimal combination by solving maximal weight clique problem (MWCP) at the second phase. Computational results show that the proposed algorithm is competitive, improves known benchmark results on some instances and saves 40–80% of delivery cost in the Tel Aviv metropolitan area.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133083229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Electrification Israel Railroads: Network Frequency Instability and Challenges of Distribution Voltage Control 以色列铁路电气化:网络频率的不稳定性和配电电压控制的挑战
I. Goldshtein, M. Averbukh
Electrification of Israel railroads is a successful project being realized during present time. Among the well-known advantages of electric train exploitation are high energetic efficiency, regenerative breaking, diminished pollution, flexibility of traffic control and improved transportation dynamics. However, the use of electric train is accompanied with some specific hurdles caused by significantly stochastic power flows. While in transit between stations an electric train has different phases of movement, during some consuming energy, but from time to time throughout braking processes they become generators transmitting energy back into the electric grid. This circumstance may produce voltage instability in distribution lines, which should be kept inside permissible limits to allow normal operation of electric equipment. Tap-changers on distribution transformers considered for a voltage regulation have sluggish response of ~7-8 sec. Therefore, fast changes of power stream can cause significant voltage deviations. If the voltage overcome explicit allowable level a trigger of a protection system is engendered disconnecting vehicles from a grid. The last causes extremely dangerous detriments and should be maximally prevented.Rapid and considerable changes in train power consumption, in addition may cause network frequency instability which in turn can violate electricity supply.Present article provides an original examination of the future stability of network frequency and distribution voltage which may be assumed when 420 km of Israel railroads will be electrified in the following 5–10 years. For such study special algorithm based on simulation approach was developed and applied. Predicting scenarios for frequency and distribution lines voltage control are represented below in the following text.
以色列铁路电气化是目前正在实现的一个成功项目。众所周知,电动列车开发的优点是高能量效率、再生制动、减少污染、交通控制的灵活性和改善运输动力学。然而,电力列车的使用伴随着一些特殊的障碍,这些障碍是由显著的随机潮流引起的。在车站之间的运输中,电动火车有不同的运动阶段,在一些消耗能量的过程中,但在整个制动过程中,它们不时地成为发电机,将能量传回电网。这种情况可能导致配电线路电压不稳定,应将其控制在允许的范围内,以保证电气设备的正常运行。用于电压调节的配电变压器分接开关响应缓慢,约为7-8秒。因此,潮流的快速变化会导致显著的电压偏差。如果电压超过明确的允许电平,则产生保护系统的触发器,断开车辆与电网的连接。最后一种会造成极其危险的危害,应该最大限度地加以防止。列车用电量的迅速而巨大的变化,还可能引起电网频率的不稳定,进而影响电力供应。本文对未来电网频率和配电电压的稳定性进行了初步研究,这可能是在未来5-10年内以色列420公里铁路将电气化的假设。为此,开发并应用了基于仿真方法的特殊算法。频率和配电线路电压控制的预测方案如下文所示。
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引用次数: 1
Memristors as Artificial Biochemical Reactions in Cytomorphic Systems 忆阻器在细胞形态系统中的人工生化反应
Hanna Abo Hanna, Loai Danial, Shahar Kvatinsky, Ramez Daniel
A memristor is a nano-scale two-terminal stochastic electronic device. This paper proposes functional analogies between biochemical reactions and memristive devices. It shows that memristors can mimic biochemical reactions and gene networks efficiently and capture both deterministic and stochastic dynamics at the nano-scale level. We present different abstraction models and voltage-controlled resistive switching circuits that inherently model the activity of genetic circuits with low signal-to-noise ratio (SNR). These findings constitute a milestone for cell-inspired circuit design with noise-tolerance and energy-efficiency features, which can provide a fast and simple emulative framework for studying arbitrary large-scale biological networks in systems and synthetic biology.
忆阻器是一种纳米级双端随机电子器件。本文提出了生化反应与记忆装置之间的功能类比。研究表明,忆阻器可以有效地模拟生物化学反应和基因网络,并在纳米尺度上捕获确定性和随机动力学。我们提出了不同的抽象模型和压控电阻开关电路,这些模型固有地模拟了低信噪比(SNR)遗传电路的活动。这些发现为具有耐噪声和节能特性的细胞启发电路设计提供了一个里程碑,为研究系统和合成生物学中的任意大规模生物网络提供了一个快速、简单的模拟框架。
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引用次数: 2
期刊
2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)
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