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Effects of Conductive Electrode for Optimized Electrochemical Performances 导电电极对优化电化学性能的影响
Pub Date : 2019-07-26 DOI: 10.33422/6th-istconf.2019.07.414
Kue‐Ho Kim, Kiwhan Sung, H. Ahn
Recently, global challenges related to increasing energy consumption have attracted many researches regarding the energy conservation and efficiency increasement. This has accelerated a performance enhancement for various electronic devices used in daily life that based on electrochemical reaction (electrochemical capacitors, Li-ion batteries, electrochromic devices etc.). The electrochemical reaction refers to the induction of an oxidation-reduction reaction in a material which accompanied with electrons and ion movement. Their performances are determined by the electrochemical reaction rate and quantity which occurs at the interface of electrode and electrolyte. The typical electrochemical devices are composed of three parts including active material layer, electrolyte layer and conductive electrode layer. Among them, conductive electrode layer transfers electrons through an external circuit and the electrical conductivity of this layer can significantly affect to the electrochemical reaction rate. In this study, we demonstrated the effects of conductive electrode layer on electrochemical device by varying the electrical conductivity of them and investigated their performance enhancement mechanisms systematically.
近年来,随着全球能源消耗的增加,节能和提高效率的研究越来越多。这加速了日常生活中基于电化学反应的各种电子设备(电化学电容器、锂离子电池、电致变色设备等)的性能提升。电化学反应是指在材料中诱导氧化还原反应,并伴有电子和离子的运动。它们的性能取决于在电极和电解质界面发生的电化学反应速率和数量。典型的电化学器件由活性材料层、电解质层和导电电极层三部分组成。其中导电电极层通过外电路传递电子,其电导率对电化学反应速率有显著影响。在本研究中,我们通过改变导电电极层的电导率来证明导电电极层对电化学器件的影响,并系统地研究了其性能增强机制。
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引用次数: 0
(Un)limited-(Mis)Placed-Space(less): The Forms of Transformation from Istanbul to Bursa (非)有限-(非)放置-空间(少):伊斯坦布尔到布尔萨的转换形式
Pub Date : 2019-07-26 DOI: 10.33422/6th-istconf.2019.07.409
Tuba Sarı
The case of transformation is discussed with high-rise development that are presented as the sign and image of mega-cities in global scale. The paper aims to question the forms of spatial transformation created by high rises at the scale of the urban design considering criteria of the relationship between the natural-physical environment and architectural-structural identity. Also, it examines the effects of the transformation on the urban fabric and the silhouette with high-rise development. In the scope of the research, the field study contains two different building projects chosen according to the method of Convenience Sampling, Süzer Plaza rising in Istanbul and Tower Plaza project in Bursa. Istanbul and Bursa, which exhibit different characteristics in terms of urban settlement, scale and structuring character, reflect the common context problem in the frame of environment-context relation of high-rises. With this paper, it is aimed to evaluate highrises from the perspective of the relationship between context and environment considering the sustainability of urban aesthetic. While high-rises mostly stand out as the sign of economic and political power on the axis of central business areas, Süzer Plaza and Tower Plaza show such a behavior that cannot be established with regard to the architectural and urban scale, which does not take any criteria in the context of urban settlement decisions resulted in un-limited, mis-placed and space-less urban areas. In conclusion, the relationship between physical and natural environment becomes more difficult as height and scale increase considering height decisions are connected with urban landscape and silhouette.
以高层建筑为例,探讨了高层建筑在全球范围内作为特大城市的标志和形象。本文的目的是在考虑自然物理环境和建筑结构特征之间关系的标准下,在城市设计的尺度上质疑高层建筑所创造的空间转换形式。同时,探讨了高层发展对城市肌理和轮廓的影响。在研究范围内,实地研究包含两个不同的建筑项目,根据方便抽样的方法选择,伊斯坦布尔的泽尔广场上升和布尔萨的塔广场项目。伊斯坦布尔和布尔萨在城市聚落、规模和结构特征等方面表现出不同的特点,在高层建筑的环境-文脉关系框架中反映出共同的文脉问题。本文旨在从城市美学的可持续性出发,从文脉与环境的关系角度对高层建筑进行评价。高层建筑大多作为经济和政治权力的标志在中心商务区的轴线上脱颖而出,而泽尔广场和塔广场则表现出一种从建筑和城市规模上无法确立的行为,这种行为在城市定居决策的背景下没有任何标准,导致城市区域不受限制、错位、无空间。综上所述,考虑到高度决策与城市景观和剪影相关,随着高度和尺度的增加,物理环境和自然环境之间的关系变得更加困难。
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引用次数: 0
Monitoring of Thermal Effect of Redox Flow Battery by the Infrared Thermal Image Technology 红外热成像技术监测氧化还原液流电池热效应
Pub Date : 2019-01-01 DOI: 10.33422/6th-istconf.2019.07.412
Chi Ping Li, M. Ling Chen, Chen Chen Tseng, Shu Ling Huang
RFB (redox flow battery) generate heat when consume the electric power in working state, and that will transfer into a thermal form emitted from the normal or abnormal state; therefore, it is important to control the thermal effect for battery’s performance and safety improvement. Specifically, RFB will bring big thermal effect when the cell charged or discharged by the higher electric current. Due to the different battery’s components and stack designs, the problems of RFB system identified by looking at the uneven heat distribution, the reduction of the battery's performance and life cycle. Therefore, it is important to understand the battery’s thermal effect in high-rate discharge or its thermal effect in overcharge cases for the state of battery’s health (SOH). Infrared thermal imager (IRTI) is a non-contact measurement, and that composed by the lens and computer analysis system. IRTI can detect a certain area of the temperature change, whereby the analysis can effectively identify the real hot spots, and make further improvements for RFB system’s design. In this study, we developed a single cell to design the battery’s stack of FB system and investigate battery’s performance changes. Infrared thermal imaging technology applied to analyze and evaluate the thermal effect of battery's stack effectively. The high-resolution images with the function of the temperature profile data used to evaluate the components of the stacks or the key materials for RFB performance, and explore the possibility of its development.
RFB(氧化还原液流电池)在工作状态下消耗电能产生热量,在正常或异常状态下将热量转化为热形式释放;因此,控制热效应对提高电池的性能和安全性具有重要意义。具体来说,当电池在较大的电流下充放电时,RFB会带来较大的热效应。由于不同的电池组件和堆叠设计,通过观察RFB系统的热量分布不均匀,降低电池的性能和寿命周期来识别问题。因此,了解电池在高倍率放电或过充情况下的热效应对电池的健康状态(SOH)具有重要意义。红外热成像仪(IRTI)是一种非接触式测量系统,由镜头和计算机分析系统组成。IRTI可以检测到某一区域的温度变化,通过分析可以有效地识别出真正的热点,为RFB系统的设计做进一步的改进。在本研究中,我们开发了一个单一的电池来设计FB系统的电池堆,并研究了电池的性能变化。应用红外热成像技术对电池堆热效应进行了有效的分析和评价。利用具有温度剖面数据功能的高分辨率图像,对RFB组件或关键材料的性能进行评估,并探讨其发展的可能性。
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引用次数: 1
Comparative Study of API Management Solutions API管理方案的比较研究
Pub Date : 2019-01-01 DOI: 10.33422/6th-istconf.2019.07.411
Syed Ali, Tariq Rahim Soomro
The aim of this paper is to perform a comparative study on Application Programming Interface (API) Management Solutions. API acts as the digital glue that links systems, applications, and services together to create influencing customer experiences. They help one rapidly develop interfaces between back-end systems and applications. Sharing these interfaces with their clients and developers can help one open revenue channels, bring new digital services to market and exceed customer expectations. In this paper solutions from the top 5 vendors were studied deeply with the focus on indutsry implementations, common widely used features, famous success stories from these vendors. Survey was also conducted on the related subject matter. In the end, contradictions and agreements were highlighted between the literature review and survey results.
本文的目的是对应用程序编程接口(API)管理解决方案进行比较研究。API充当数字粘合剂,将系统、应用程序和服务连接在一起,创造有影响力的客户体验。它们有助于快速开发后端系统和应用程序之间的接口。与客户和开发者共享这些接口可以帮助他们打开盈利渠道,将新的数字服务推向市场,并超越客户的期望。本文对排名前五的厂商的解决方案进行了深入的研究,重点是行业实现、常见的广泛使用的特性以及这些厂商的著名成功案例。并就有关主题进行调查。最后,突出了文献综述与调查结果之间的矛盾和一致。
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引用次数: 0
Declarative configuration management for complex and dynamic networks 用于复杂和动态网络的声明式配置管理
Xu Chen, Yun Mao, Z. Morley Mao, J. Merwe
Network management and operations are complicated, tedious, and error-prone, requiring signifcant human involvement and domain knowledge. As the complexity involved inevitably grows due to larger scale networks and more complex protocol features, human operators are increasingly short-handed, despite the best effort from existing support systems to make it otherwise. This paper presents coolaid, a system under which the domain knowledge of device vendors and service providers is formally captured by a declarative language. Through effcient and powerful rule-based reasoning on top of a database-like abstraction over a network of devices, coolaid enables new management primitives to perform network-wide reasoning, prevent misconfguration, and automate network confguration, while requiring minimum operator effort. We describe the design and prototype implementation of coolaid, and demonstrate its effectiveness and scalability through various realistic network management tasks.
网络管理和操作是复杂、繁琐且容易出错的,需要大量的人力参与和领域知识。由于规模更大的网络和更复杂的协议特征,所涉及的复杂性不可避免地增加,尽管现有的支持系统尽了最大努力,但人工操作员越来越人手不足。本文提出了coolaid系统,在该系统下,设备供应商和服务提供商的领域知识被一种声明性语言正式捕获。通过在设备网络上的类似数据库的抽象之上进行有效而强大的基于规则的推理,coolaid使新的管理原语能够执行网络范围的推理,防止错误配置,并自动进行网络配置,同时只需要最少的操作员工作。我们描述了coolaid的设计和原型实现,并通过各种现实的网络管理任务演示了其有效性和可扩展性。
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引用次数: 67
NEVERMIND, the problem is already fixed: proactively detecting and troubleshooting customer DSL problems 没关系,问题已经解决了:主动检测和排除客户DSL问题
Yu Jin, N. Duffield, Alexandre Gerber, P. Haffner, S. Sen, Zhi-Li Zhang
Traditional DSL troubleshooting solutions are reactive, relying mainly on customers to report problems, and tend to be labor-intensive, time consuming, prone to incorrect resolutions and overall can contribute to increased customer dissatisfaction. In this paper, we propose a proactive approach to facilitate troubleshooting customer edge problems and reducing customer tickets. Our system consists of: i) a ticket predictor which predicts future customer tickets; and ii) a trouble locator which helps technicians accelerate the troubleshooting process during field dispatches. Both components infer future tickets and trouble locations based on existing sparse line measurements, and the inference models are constructed automatically using supervised machine learning techniques. We propose several novel techniques to address the operational constraints in DSL networks and to enhance the accuracy of NEVERMIND. Extensive evaluations using an entire year worth of customer tickets and measurement data from a large network show that our method can predict thousands of future customer tickets per week with high accuracy and signifcantly reduce the time and effort for diagnosing these tickets. This is benefcial as it has the effect of both reducing the number of customer care calls and improving customer satisfaction.
传统的DSL故障排除解决方案是被动的,主要依赖于客户报告问题,并且往往是劳动密集型的,耗时的,容易出现错误的解决方案,并且总的来说可能会增加客户的不满。在本文中,我们提出了一种主动的方法来方便地排除客户边缘问题并减少客户票。我们的系统包括:i)预测未来客户门票的门票预测器;ii)故障定位器,帮助技术人员在现场调度过程中加快故障排除过程。这两个组件都基于现有的稀疏线测量来推断未来的票据和故障位置,并且使用监督机器学习技术自动构建推理模型。我们提出了几种新的技术来解决DSL网络中的操作限制,并提高NEVERMIND的准确性。使用一整年的客户票和来自大型网络的测量数据进行的广泛评估表明,我们的方法可以每周高精度地预测数千张未来的客户票,并显着减少诊断这些票的时间和精力。这是有益的,因为它既可以减少客户服务电话的数量,又可以提高客户满意度。
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引用次数: 24
Simple yet efficient, transparent airtime allocation for TCP in wireless mesh networks 简单而高效、透明的无线网状网络TCP传输时间分配
Ki-Young Jang, K. Psounis, R. Govindan
In this paper, we explore a simple yet effective technique for explicitly allocating airtime to each active pair of communicating neighbors in a wireless neighborhood so that TCP starvation in a wireless mesh network is avoided. Our explicit allocation is efficient, redistributing unused airtime and also accounting for airtime rendered unusable by external interference. Our technique requires no modifications to TCP/IP and the 802.11 MAC, and is responsive to short flows, MAC-layer auto rate adaptation, and other dynamics, as we demonstrate in extensive experiments on two indoor testbeds. Despite its simplicity, the technique is on average within 12% of the max-min optimal allocation on several topologies.
在本文中,我们探索了一种简单而有效的技术,用于显式地为无线邻居中的每个活动通信邻居分配广播时间,从而避免无线网状网络中的TCP饥饿。我们的显式分配是有效的,重新分配未使用的通话时间,也考虑到由于外部干扰而无法使用的通话时间。我们的技术不需要修改TCP/IP和802.11 MAC,并且响应短流、MAC层自适应速率和其他动态,正如我们在两个室内测试台上进行的大量实验所证明的那样。尽管它很简单,但在几种拓扑结构上,该技术的平均分配在最大最小最优分配的12%以内。
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引用次数: 16
Federation of virtualized infrastructures: sharing the value of diversity 虚拟化基础设施联盟:共享多样性价值
P. Antoniadis, S. Fdida, T. Friedman, V. Misra
By federating virtualized computing and network resources one can significantly increase their value thanks to gains from statistical multiplexing and increases in resource diversity (more distinct locations, technologies, etc.). Successful federation depends upon resource providers being able to agree on policies: how to share the profit generated by external customers and/or how to allocate the resources contributed by the federation participants to their affiliated users. This paper's main contribution is a method that enables organizers of a federation to evaluate the relative importance of the resources contributed by each participant. We build on coalitional game theory concepts and formulate a generic economic model of federation that captures the notion of diversity, which is relevant for a variety of overlay services, and notably the networking research experiments that are running today on PlanetLab. Based on this model, we propose the Shapley value as a means for participants to share the value of federation. We show how this approach can help in the design of policies that encourage infrastructure owners to federate.
通过联合虚拟化计算和网络资源,可以显著提高它们的价值,这要归功于统计多路复用和资源多样性(更不同的位置、技术等)的增加。成功的联合取决于资源提供者是否能够就策略达成一致:如何分享外部客户产生的利润和/或如何将联合参与者贡献的资源分配给其附属用户。本文的主要贡献是提供了一种方法,使联盟的组织者能够评估每个参与者贡献的资源的相对重要性。我们建立在联盟博弈论概念的基础上,并制定了一个通用的联邦经济模型,该模型捕捉了多样性的概念,这与各种覆盖服务相关,特别是今天在PlanetLab上运行的网络研究实验。在此模型的基础上,我们提出了Shapley值作为参与者分享联盟价值的一种手段。我们将展示这种方法如何帮助设计鼓励基础设施所有者联合起来的策略。
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引用次数: 24
Strengthening forensic investigations of child pornography on P2P networks 加强对P2P网络儿童色情内容的司法调查
M. Liberatore, B. Levine, C. Shields
Measurements of the Internet for law enforcement purposes must be forensically valid. We examine the problems inherent in using various network- and application-level identifiers in the context of forensic measurement, as exemplified in the policing of peer-to-peer file sharing networks for sexually exploitative imagery of children (child pornography). First, we present a five-month measurement performed in the law enforcement context. We then show how the identifiers in these measurements can be unreliable, and propose the tagging of remote machines. Our proposed tagging method marks remote machines by providing them with application- or system-level data which is valid, but which covertly has meaning to investigators. This tagging allows investigators to link network observations with physical evidence in a legal, forensically strong, and valid manner. We present a detailed model and analysis of our method, show how tagging can be used in several specific applications, discuss the general applicability of our method, and detail why the tags are strong evidence of criminal intent and participation in a crime.
用于执法目的的互联网测量必须在法律上有效。我们研究了在法医测量的背景下使用各种网络和应用级标识符所固有的问题,例如对儿童性剥削图像(儿童色情)的点对点文件共享网络的监管。首先,我们提出了在执法背景下进行的为期五个月的测量。然后,我们将展示这些测量中的标识符如何不可靠,并提出对远程机器进行标记的建议。我们提出的标记方法通过向远程机器提供应用程序或系统级数据来标记它们,这些数据是有效的,但这些数据对调查人员具有隐蔽的意义。这种标记允许调查人员以合法的、法医强有力的和有效的方式将网络观察与物理证据联系起来。我们展示了我们方法的详细模型和分析,展示了标签如何在几个特定的应用中使用,讨论了我们方法的一般适用性,并详细说明了为什么标签是犯罪意图和参与犯罪的有力证据。
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引用次数: 26
Profiling-By-Association: a resilient traffic profiling solution for the internet backbone 关联分析:针对互联网骨干网的弹性流量分析解决方案
Marios Iliofotou, Brian Gallagher, Tina Eliassi-Rad, Guowu Xie, M. Faloutsos
Profiling Internet backbone traffic is becoming an increasingly hard problem since users and applications are avoiding detection using traffic obfuscation and encryption. The key question addressed here is: Is it possible to profile traffic at the backbone without relying on its packet and flow level information, which can be obfuscated? We propose a novel approach, called Profiling-By-Association (PBA), that uses only the IP-to-IP communication graph and information about some applications used by few IP-hosts (a.k.a. seeds). The key insight is that IP-hosts tend to communicate more frequently with hosts involved in the same application forming communities (or clusters). Profiling few members within a cluster can "give away" the whole community. Following our approach, we develop different algorithms to profile Internet traffic and evaluate them on real-traces from four large backbone networks. We show that PBA's accuracy is on average around 90% with knowledge of only 1% of all the hosts in a given data set and its runtime is on the order of minutes (≈ 5).
由于用户和应用程序使用流量混淆和加密来避免检测,对互联网骨干流量进行分析已成为越来越困难的问题。这里要解决的关键问题是:是否有可能在不依赖于可能被混淆的分组和流级信息的情况下对骨干网络的流量进行分析?我们提出了一种新的方法,称为关联分析(PBA),它只使用ip到ip通信图和关于少数ip主机(又名种子)使用的一些应用程序的信息。关键是ip主机倾向于更频繁地与组成社区(或集群)的相同应用程序中的主机进行通信。分析集群中的少数成员可能会“泄露”整个社区。根据我们的方法,我们开发了不同的算法来分析互联网流量,并在四个大型骨干网的真实轨迹上对其进行评估。我们表明,PBA的准确率平均约为90%,仅了解给定数据集中所有主机的1%,其运行时间约为分钟(≈5)。
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引用次数: 42
期刊
Proceedings of The 6th International Conference on Innovation in Science and Technology
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