首页 > 最新文献

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

英文 中文
Design of Multi-Core Integrated Wavelength-Selective Switch, and its System Benefits 多核集成波长选择开关的设计及其系统效益
M. Blau, D. Marom
Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging effect reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. We demonstrated in the past that it also broadens the passband of cascaded few-mode WSS passages. In this paper, we analyze the performance of multicore WSS, and the favorable impact of strong coupling for MCF-WSS cascades, taking into account the asymmetry of the MCF.
模分复用光纤的强混频在很多方面都具有优势。它的平均效应降低了群延迟扩展、模相关损耗和非线性累积。在过去的研究中,我们证明了它还可以拓宽级联的少模WSS通道的通带。在本文中,我们分析了多核WSS的性能,以及强耦合对MCF-WSS级联的有利影响,同时考虑了MCF的不对称性。
{"title":"Design of Multi-Core Integrated Wavelength-Selective Switch, and its System Benefits","authors":"M. Blau, D. Marom","doi":"10.1109/ICSEE.2018.8646257","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646257","url":null,"abstract":"Strong mixing in mode division multiplexed fiber is advantageous in many aspects. Its averaging effect reduces group delay spread, mode dependent loss (MDL), and accumulated nonlinearity. We demonstrated in the past that it also broadens the passband of cascaded few-mode WSS passages. In this paper, we analyze the performance of multicore WSS, and the favorable impact of strong coupling for MCF-WSS cascades, taking into account the asymmetry of the MCF.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"59 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":"128446659","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: 0
Scaling of Cloud Resources-Principal Component Analysis and Random Forest Approach 云资源的缩放——主成分分析和随机森林方法
Omer Anisfeld, Erez Biton, Ruven Milshtein, M. Shifrin, Omer Gurewitz
The scaling challenge for a system which constitutes multiple clients, which address application servers deployed on the cloud, becomes more complicate once the applications’ nature imply consistent communication, e.g., video streaming. The effective scaling solution in this case is such that it will assure an acceptable client quality of experience (QoE), typically measured by video delay. In this paper, we provide a solution to the auto-scaling for cloud provider by means of analyzing the impact of various system parameters. The parameters which may impact the QoE on the client side include, but not limited to, average memory consumption, transmission and reception frequency, average CPU consumption on the side of the cloud provider. We perform Principal Component Analysis (PCA) in order to find a projection of the parameters, resulting in a set of features which can be sorted by their measure of impact. Next, we introduce scaling decision mechanism based on Random Forest (RF). Only most influencing features are employed for that, which renders the training process of the RF to be computationally effective. The proposed approach is novel in the sense that the scaling decisions found by the RF are in the projected space found by PCA (instead of having threshold derived directly from the original parameters), which is not necessarily intuitive. However, these features are numerically approved to be the most influencing. Moreover, as long as the features in the projected space are uncorrelated, it allows us to base the RF on only small subset of them, which would be ineffective in the original measurements space, where the correlation is high. In our Kubernetes-based implementation which employs this method, the resulting auto-scaler performs better than the default auto-scaler.
对于一个由多个客户端组成的系统(这些客户端地址部署在云上的应用服务器)来说,一旦应用程序的性质意味着一致的通信(例如视频流),扩展挑战就会变得更加复杂。在这种情况下,有效的扩展解决方案是这样的,它将确保可接受的客户端体验质量(QoE),通常由视频延迟衡量。本文通过分析各种系统参数的影响,为云提供商提供了一种自动扩展的解决方案。可能影响客户端QoE的参数包括(但不限于)云提供商端的平均内存消耗、传输和接收频率、平均CPU消耗。我们执行主成分分析(PCA)以找到参数的投影,从而得到一组可以根据其影响度量进行排序的特征。其次,我们引入了基于随机森林(RF)的尺度决策机制。仅使用影响最大的特征,使得RF的训练过程在计算上是有效的。所提出的方法是新颖的,因为RF发现的缩放决策是在PCA发现的投影空间中(而不是直接从原始参数中获得阈值),这并不一定是直观的。然而,这些特征在数值上被认为是最具影响力的。此外,只要投影空间中的特征是不相关的,它允许我们仅基于它们的一小部分来建立RF,这在原始测量空间中是无效的,因为相关性很高。在我们基于kubernetes的实现中,使用了这种方法,生成的自动缩放器比默认的自动缩放器性能更好。
{"title":"Scaling of Cloud Resources-Principal Component Analysis and Random Forest Approach","authors":"Omer Anisfeld, Erez Biton, Ruven Milshtein, M. Shifrin, Omer Gurewitz","doi":"10.1109/ICSEE.2018.8646134","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646134","url":null,"abstract":"The scaling challenge for a system which constitutes multiple clients, which address application servers deployed on the cloud, becomes more complicate once the applications’ nature imply consistent communication, e.g., video streaming. The effective scaling solution in this case is such that it will assure an acceptable client quality of experience (QoE), typically measured by video delay. In this paper, we provide a solution to the auto-scaling for cloud provider by means of analyzing the impact of various system parameters. The parameters which may impact the QoE on the client side include, but not limited to, average memory consumption, transmission and reception frequency, average CPU consumption on the side of the cloud provider. We perform Principal Component Analysis (PCA) in order to find a projection of the parameters, resulting in a set of features which can be sorted by their measure of impact. Next, we introduce scaling decision mechanism based on Random Forest (RF). Only most influencing features are employed for that, which renders the training process of the RF to be computationally effective. The proposed approach is novel in the sense that the scaling decisions found by the RF are in the projected space found by PCA (instead of having threshold derived directly from the original parameters), which is not necessarily intuitive. However, these features are numerically approved to be the most influencing. Moreover, as long as the features in the projected space are uncorrelated, it allows us to base the RF on only small subset of them, which would be ineffective in the original measurements space, where the correlation is high. In our Kubernetes-based implementation which employs this method, the resulting auto-scaler performs better than the default auto-scaler.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"54 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":"128518158","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
A Novel Reliability Model For GaN Power FET 一种新型GaN功率场效应管可靠性模型
G. Golan, M. Azoulay, S. Shaheen, J. Bernstein
The existing standard reliability models for power devices are not satisfactory and they fall short of predicting failure rates or wear-out lifetime of semiconductor products. This is mainly attributed to two reasons; the lack of a unified approach for predicting device failure rates and the fact that all commercial reliability evaluation methods relay on the acceleration of one dominant failure mechanism. Recently, device reliability research programs are aimed to develop new theoretical models and experimental methods that would result at a better assessment of the device lifetime as well as point out on the dominating failure mechanism for particular operating conditions. A novel model, named Multi-failure mechanism, Overstress Life test (MOL) has been introduced and posed a better understanding of the dominating failure mechanisms under various stressed conditions in advanced FPGA devices (for 45nm and 28nm technologies). More recently, we have presented, for the first time, the implementation of the MOL model to investigate the reliability of silicon power MOSFET devices. Both, LT Spice simulation and experimental data were presented for a test circuit of a ring oscillator, based on CMOS-FET, NMOS-FET and PMOS-FET. The monitored data was acquired in-situ in form of the ring frequency or Vds values that enabled to assess the lifetime and determine the dominating mechanism during accelerated wear-out by temperature, applied bias voltage, thermal cycling, gamma and electron irradiation. In this paper, we extend our study to investigate GaN HEMT reliability by our newly developed MOL model. Complex RO circuits containing all GaN devices and mixed (GaN HEMT-Si MOSFET) have been tested. Rds-on monitoring circuit has also been operated during thermal cycling of the tested component and the acceleration factor was derived for various operational parameters. It is noted that the presented data is the first attempt to monitor the GaN device degradation rate in-situ, during accelerated wear-out conditions. However, we are still working to extend the experimental results, aimed to determine the full multi mechanism matrix.
现有的功率器件标准可靠性模型在预测半导体产品的故障率或损耗寿命方面存在不足。这主要归因于两个原因;缺乏统一的方法来预测设备故障率,以及所有商业可靠性评估方法都依赖于一种主要失效机制的加速。最近,设备可靠性研究计划旨在开发新的理论模型和实验方法,以更好地评估设备寿命,并指出特定操作条件下的主要失效机制。介绍了一种新的模型,称为多失效机制,超应力寿命测试(MOL),并对先进FPGA器件(用于45nm和28nm技术)在各种应力条件下的主要失效机制进行了更好的理解。最近,我们首次提出了MOL模型的实现,以研究硅功率MOSFET器件的可靠性。给出了基于CMOS-FET、NMOS-FET和PMOS-FET的环形振荡器测试电路的LT Spice仿真和实验数据。现场监测数据以环频率或Vds值的形式获得,可以评估寿命并确定温度、施加偏置电压、热循环、伽马和电子辐照加速磨损过程中的主导机制。在本文中,我们扩展了我们的研究,用我们新开发的MOL模型来研究GaN HEMT的可靠性。包含所有GaN器件和混合(GaN HEMT-Si MOSFET)的复杂RO电路已经过测试。在被测部件热循环过程中运行了Rds-on监测电路,并推导了各种运行参数下的加速度因子。值得注意的是,所提供的数据是第一次尝试监测GaN器件在加速磨损条件下的原位降解率。然而,我们仍在努力扩展实验结果,旨在确定完整的多机制矩阵。
{"title":"A Novel Reliability Model For GaN Power FET","authors":"G. Golan, M. Azoulay, S. Shaheen, J. Bernstein","doi":"10.1109/ICSEE.2018.8646142","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646142","url":null,"abstract":"The existing standard reliability models for power devices are not satisfactory and they fall short of predicting failure rates or wear-out lifetime of semiconductor products. This is mainly attributed to two reasons; the lack of a unified approach for predicting device failure rates and the fact that all commercial reliability evaluation methods relay on the acceleration of one dominant failure mechanism. Recently, device reliability research programs are aimed to develop new theoretical models and experimental methods that would result at a better assessment of the device lifetime as well as point out on the dominating failure mechanism for particular operating conditions. A novel model, named Multi-failure mechanism, Overstress Life test (MOL) has been introduced and posed a better understanding of the dominating failure mechanisms under various stressed conditions in advanced FPGA devices (for 45nm and 28nm technologies). More recently, we have presented, for the first time, the implementation of the MOL model to investigate the reliability of silicon power MOSFET devices. Both, LT Spice simulation and experimental data were presented for a test circuit of a ring oscillator, based on CMOS-FET, NMOS-FET and PMOS-FET. The monitored data was acquired in-situ in form of the ring frequency or Vds values that enabled to assess the lifetime and determine the dominating mechanism during accelerated wear-out by temperature, applied bias voltage, thermal cycling, gamma and electron irradiation. In this paper, we extend our study to investigate GaN HEMT reliability by our newly developed MOL model. Complex RO circuits containing all GaN devices and mixed (GaN HEMT-Si MOSFET) have been tested. Rds-on monitoring circuit has also been operated during thermal cycling of the tested component and the acceleration factor was derived for various operational parameters. It is noted that the presented data is the first attempt to monitor the GaN device degradation rate in-situ, during accelerated wear-out conditions. However, we are still working to extend the experimental results, aimed to determine the full multi mechanism matrix.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"34 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":"128572663","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: 1
Information Transmission of Chirped Acoustic Signals and Power Transfer in Medical Implants 医用植入物中啁啾声信号的信息传输与功率传输
A. Krichevsky, Yuval Shklarsh, B. Kantor, Denis Dikarov
in this paper, we show a general method for transmission of information signals in medical implants by using an acoustic channel. The proposed method is immune to the presence of acoustic interferences, and in particular, the presence of a simultaneous acoustical energy transfer for charging the implant battery. This method is based on acoustic transmission of chirped information signals through acoustic field. The feasibility of this method is confirmed by presented experiment, where PZT piezoceramic disks are used as transducers in the acoustic (ultrasonic) channel.
在本文中,我们展示了一种利用声通道在医疗植入物中传输信息信号的一般方法。所提出的方法不受声学干扰的存在,特别是不受用于给植入电池充电的同时存在的声能转移的存在。该方法是基于啁啾信息信号通过声场的声传输。通过实验验证了该方法的可行性,并将压电陶瓷片用作声(超声)通道中的换能器。
{"title":"Information Transmission of Chirped Acoustic Signals and Power Transfer in Medical Implants","authors":"A. Krichevsky, Yuval Shklarsh, B. Kantor, Denis Dikarov","doi":"10.1109/ICSEE.2018.8646174","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646174","url":null,"abstract":"in this paper, we show a general method for transmission of information signals in medical implants by using an acoustic channel. The proposed method is immune to the presence of acoustic interferences, and in particular, the presence of a simultaneous acoustical energy transfer for charging the implant battery. This method is based on acoustic transmission of chirped information signals through acoustic field. The feasibility of this method is confirmed by presented experiment, where PZT piezoceramic disks are used as transducers in the acoustic (ultrasonic) channel.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"34 5 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":"117278279","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: 0
Identifying Abusive Comments in Hebrew Facebook 识别希伯来语Facebook中的滥用评论
Chaya Liebeskind, Shmuel Liebeskind
In this study, we aim to classify comments as abusive or non-abusive. We develop a Hebrew corpus of user comments annotated for abusive language. Then, we investigate highly sparse n-grams representations as well as denser character n-grams representations for comment abuse classification. Since the comments in social media are usually short, we also investigate four dimension reduction methods, which produce word vectors that collapse similar words into groups. We show that the character n-grams representations outperform all the other representation for the task of identifying abusive comments.
在本研究中,我们的目标是将评论分类为辱骂性或非辱骂性。我们开发了一个希伯来语的用户评论语料库,对辱骂性语言进行了注释。然后,我们研究了用于评论滥用分类的高度稀疏n-图表示和更密集的字符n-图表示。由于社交媒体上的评论通常很短,我们还研究了四维降维方法,它产生了将相似的词分解成组的词向量。我们表明,字符n-图表示在识别辱骂评论的任务中优于所有其他表示。
{"title":"Identifying Abusive Comments in Hebrew Facebook","authors":"Chaya Liebeskind, Shmuel Liebeskind","doi":"10.1109/ICSEE.2018.8646190","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646190","url":null,"abstract":"In this study, we aim to classify comments as abusive or non-abusive. We develop a Hebrew corpus of user comments annotated for abusive language. Then, we investigate highly sparse n-grams representations as well as denser character n-grams representations for comment abuse classification. Since the comments in social media are usually short, we also investigate four dimension reduction methods, which produce word vectors that collapse similar words into groups. We show that the character n-grams representations outperform all the other representation for the task of identifying abusive comments.","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":"116147931","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: 13
Spatio-Temporal Detection of Cumulonimbus Clouds in Infrared Satellite Images 红外卫星图像中积雨云的时空探测
Ron Dorfman, Etai Wagner, Almog Lahav, A. Amar, R. Talmon, Yaron Halle
In this paper, we address the problem of Cumulonimbus (Cb) cloud detection from Infrared (IR) satellite images. The detection of such storm clouds is of high importance since they pose extreme danger to aviation. We present a joint spatio-temporal detection method that exploits the distinct spatial characteristics of Cb clouds as well as their prototypical evolution over time. The presented method is unsupervised and does not require labeled data or predefined spatial handcrafted features, such as particular shapes, temperatures, textures, and gradients. We demonstrate the performance of the proposed method on several sequences of IR satellite images taken from the middle east region.
本文研究了利用红外卫星图像检测积雨云的问题。探测这种风暴云是非常重要的,因为它们对航空构成了极大的危险。我们提出了一种联合时空检测方法,该方法利用了Cb云的独特空间特征及其随时间的典型演化。所提出的方法是无监督的,不需要标记数据或预定义的空间手工特征,如特定的形状、温度、纹理和梯度。我们对中东地区的红外卫星图像序列进行了验证。
{"title":"Spatio-Temporal Detection of Cumulonimbus Clouds in Infrared Satellite Images","authors":"Ron Dorfman, Etai Wagner, Almog Lahav, A. Amar, R. Talmon, Yaron Halle","doi":"10.1109/ICSEE.2018.8646047","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646047","url":null,"abstract":"In this paper, we address the problem of Cumulonimbus (Cb) cloud detection from Infrared (IR) satellite images. The detection of such storm clouds is of high importance since they pose extreme danger to aviation. We present a joint spatio-temporal detection method that exploits the distinct spatial characteristics of Cb clouds as well as their prototypical evolution over time. The presented method is unsupervised and does not require labeled data or predefined spatial handcrafted features, such as particular shapes, temperatures, textures, and gradients. We demonstrate the performance of the proposed method on several sequences of IR satellite images taken from the middle east region.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"115 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":"116197743","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: 0
Effect of Reverberation in Speech-based Emotion Recognition 混响在语音情感识别中的作用
Shujie Zhao, Yan Yang, Jingdong Chen
In room environment, echo, reverberation, interference and additive noise cast the major challenges for emotional speech recognition due to degradation in quality and reliability of recorded speech signals. In this paper, we investigate effects of reverberation and noise on speech-based emotion recognition by comparing clean speech signal, adding simulated reverberant data, de-reverberant data and signal with added noise. First, we develop an emotional speech corpus of these four kinds of emotional speech data sources. Then we apply GMM-UBM framework to evaluate the performance of emotion recognition based on them. Results show that reverberation reduces emotion recognition accuracy by 5.87%, and a process of de-reverberation can largely cover this reduction.
在室内环境下,由于记录语音信号的质量和可靠性下降,回声、混响、干扰和加性噪声是情感语音识别面临的主要挑战。本文通过对比纯净语音信号、添加模拟混响数据、去混响数据和添加噪声的信号,研究混响和噪声对基于语音的情感识别的影响。首先,我们开发了一个包含这四种情感语音数据源的情感语音语料库。然后应用GMM-UBM框架对基于它们的情感识别性能进行评价。结果表明,混响使情绪识别准确率降低了5.87%,去混响处理可以在很大程度上弥补这种降低。
{"title":"Effect of Reverberation in Speech-based Emotion Recognition","authors":"Shujie Zhao, Yan Yang, Jingdong Chen","doi":"10.1109/ICSEE.2018.8645989","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8645989","url":null,"abstract":"In room environment, echo, reverberation, interference and additive noise cast the major challenges for emotional speech recognition due to degradation in quality and reliability of recorded speech signals. In this paper, we investigate effects of reverberation and noise on speech-based emotion recognition by comparing clean speech signal, adding simulated reverberant data, de-reverberant data and signal with added noise. First, we develop an emotional speech corpus of these four kinds of emotional speech data sources. Then we apply GMM-UBM framework to evaluate the performance of emotion recognition based on them. Results show that reverberation reduces emotion recognition accuracy by 5.87%, and a process of de-reverberation can largely cover this reduction.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"91 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":"114801696","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: 0
Virtual infinite capacitor applied to DC-link voltage filtering for electric vehicle chargers 虚拟无限电容在电动汽车充电器直流电压滤波中的应用
Vinay Bhus, Jun Lin, G. Weiss
The virtual infinite capacitor (VIC) is a nonlinear active capacitor for DC voltage filtering. It can replace large and unreliable electrolytic capacitors and is intended for DC systems where random fluctuations of the DC bus voltage may occur. In this paper, we investigate the use of a VIC for stabilizing the DC bus voltage in an electric vehicle (EV) charger. In order to solve the intrinsic problem of the second harmonic ripple power in a single-phase AC/DC converter, a plug-and-play VIC is used to replace the bulky DC-link capacitor for voltage filtering.
虚无限电容(VIC)是一种用于直流电压滤波的非线性有源电容。它可以取代大而不可靠的电解电容器,适用于可能发生直流母线电压随机波动的直流系统。在本文中,我们研究了在电动汽车充电器中使用VIC来稳定直流母线电压。为了解决单相AC/DC变换器固有的二次谐波纹波功率问题,采用即插即用VIC代替笨重的直流链路电容进行电压滤波。
{"title":"Virtual infinite capacitor applied to DC-link voltage filtering for electric vehicle chargers","authors":"Vinay Bhus, Jun Lin, G. Weiss","doi":"10.1109/ICSEE.2018.8645981","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8645981","url":null,"abstract":"The virtual infinite capacitor (VIC) is a nonlinear active capacitor for DC voltage filtering. It can replace large and unreliable electrolytic capacitors and is intended for DC systems where random fluctuations of the DC bus voltage may occur. In this paper, we investigate the use of a VIC for stabilizing the DC bus voltage in an electric vehicle (EV) charger. In order to solve the intrinsic problem of the second harmonic ripple power in a single-phase AC/DC converter, a plug-and-play VIC is used to replace the bulky DC-link capacitor for voltage filtering.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"30 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":"125277103","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: 1
Big Data Analysis of Employee Turnover in Global Media Companies, Google, Facebook and Others 全球媒体公司、谷歌、Facebook等员工离职的大数据分析
Alon Sela, Hila Chalutz Ben-Gal
An analysis of a unique data set of over 970,000 Curriculum Vitas (CVs), revealed a mild inverse relation between job satisfaction and the average employment period. We found that while higher compensation packages often lead to higher job satisfaction, this does not translate into longer employment period. Moreover, our findings indicate an opposite and surprising pattern, in which as salary and satisfaction levels increase, employment period per job decreases. This counter-intuitive effect was found to be strongest in global high technology companies, such as Google and Facebook.
一项对超过97万份简历的独特数据集的分析显示,工作满意度和平均就业时间之间存在轻微的反比关系。我们发现,虽然更高的薪酬通常会带来更高的工作满意度,但这并不能转化为更长的雇佣期。此外,我们的研究结果表明了一个相反的、令人惊讶的模式,即随着工资和满意度的提高,每份工作的雇佣期减少。研究发现,这种反直觉效应在谷歌(Google)和Facebook等全球高科技公司最为明显。
{"title":"Big Data Analysis of Employee Turnover in Global Media Companies, Google, Facebook and Others","authors":"Alon Sela, Hila Chalutz Ben-Gal","doi":"10.1109/ICSEE.2018.8645991","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8645991","url":null,"abstract":"An analysis of a unique data set of over 970,000 Curriculum Vitas (CVs), revealed a mild inverse relation between job satisfaction and the average employment period. We found that while higher compensation packages often lead to higher job satisfaction, this does not translate into longer employment period. Moreover, our findings indicate an opposite and surprising pattern, in which as salary and satisfaction levels increase, employment period per job decreases. This counter-intuitive effect was found to be strongest in global high technology companies, such as Google and Facebook.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"11 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":"127186083","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: 12
The stability of a synchronous generator with a prime mover connected to a resistive load 原动机与阻性负载相连的同步发电机的稳定性
Zeev Kustanovich, G. Weiss
We present the stability analysis of a system which contains a synchronous generator (SG) with its prime mover and a resistive load. Inductive transmission lines connect between these. The model of the SG and its prime mover includes a frequency droop loop that acts through the prime mover and its governor, with its own dynamics. The SG model takes into account the variation of the inductances with the rotor angle. We derive a mathematical model of the system that takes into account a simplified model of the damper windings and is a fifth order nonlinear system. We present sufficient conditions on the model’s parameters to insure local stability for the system. We strive to find sufficient conditions that are easy to verify. We use Lyapunov functions and the port-Hamiltonian representation.
本文给出了包含同步发电机及其原动机和电阻性负载的系统的稳定性分析。感应传输线在它们之间连接。SG及其原动机的模型包括一个频率下垂环路,该环路通过原动机及其调节器起作用,具有自己的动力学。SG模型考虑了电感随转子角度的变化。推导了该系统的数学模型,该模型考虑了阻尼器绕组的简化模型,是一个五阶非线性系统。给出了模型参数保证系统局部稳定的充分条件。我们力求找到易于验证的充分条件。我们使用Lyapunov函数和port- hamilton表示。
{"title":"The stability of a synchronous generator with a prime mover connected to a resistive load","authors":"Zeev Kustanovich, G. Weiss","doi":"10.1109/ICSEE.2018.8646017","DOIUrl":"https://doi.org/10.1109/ICSEE.2018.8646017","url":null,"abstract":"We present the stability analysis of a system which contains a synchronous generator (SG) with its prime mover and a resistive load. Inductive transmission lines connect between these. The model of the SG and its prime mover includes a frequency droop loop that acts through the prime mover and its governor, with its own dynamics. The SG model takes into account the variation of the inductances with the rotor angle. We derive a mathematical model of the system that takes into account a simplified model of the damper windings and is a fifth order nonlinear system. We present sufficient conditions on the model’s parameters to insure local stability for the system. We strive to find sufficient conditions that are easy to verify. We use Lyapunov functions and the port-Hamiltonian representation.","PeriodicalId":254455,"journal":{"name":"2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)","volume":"33 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":"124128138","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
期刊
2018 IEEE International Conference on the Science of Electrical Engineering in Israel (ICSEE)
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1