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2020 Intermountain Engineering, Technology and Computing (IETC)最新文献

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Impact of Quantum Values on Multilevel Feedback Queue for CPU Scheduling 量子值对CPU调度多级反馈队列的影响
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249188
David Mulder, Joseph Ssempala, Todd Walton, Ben Parker, Stephen Brough, Sam Bush, Soha Boroojerdi, Jingpeng Tang
CPU scheduling is the basis of multi-programmable operating systems to make a computer more productive and is varied active research topic most especially with increasing multicore computers to efficiently switch the CPU among processes. This paper discusses three existing process scheduling algorithms, Round Robin (RR), First Come First Serve (FCFS), Multilevel Feedback Queue (MFQ) and makes the argument that the optimal quantums are 4 and 13 for MFQ. Proposals for further work include exploring concepts such as machine learning to determine the best quantum numbers; Implementation of parallelization to utilize multicore computers.
CPU调度是多可编程操作系统提高计算机生产效率的基础,是一个活跃的研究课题,特别是随着多核计算机的发展,如何在多个进程之间有效地切换CPU。本文讨论了现有的三种进程调度算法:轮询调度算法(RR)、先到先服务算法(FCFS)和多级反馈队列算法(MFQ),并论证了MFQ的最优量子为4和13。进一步工作的建议包括探索机器学习等概念,以确定最佳量子数;利用多核计算机实现并行化。
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引用次数: 0
A Speech Emotion Recognition Solution-based on Support Vector Machine for Children with Autism Spectrum Disorder to Help Identify Human Emotions 一种基于支持向量机的自闭症谱系障碍儿童语音情绪识别方法,帮助识别人类情绪
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249147
Rezwan Matin, Damian Valles
Children who fall into the autism spectrum have difficulty communicating with others. In this work, a speech emotion recognition model has been developed to help children with Autism Spectrum Disorder (ASD) identify emotions in social interactions. The model is created using the Python programming language to develop a machine learning model based on the Support Vector Machine (SVM). SVM has proven to yield high accuracies when classifying inputs in speech processing. Individual audio databases are specifically designed to train models for the emotion recognition task. One such speech corpus is the Ryerson Audio-Visual Database of Emotional Speech and Song (RAVDESS), which is used to train the model in this work. Acoustic feature extraction will be part of the pre-processing step utilizing Python libraries. The libROSA library is used in this work. The first 26 Mel-frequency Cepstral Coefficients (MFCCs) and the zero-crossing rate (ZCR) are extracted and used as the acoustic features to train the machine learning model. The final SVM model provided a test accuracy of 77%. This model also performed well when significant background noise was introduced to the RAVDESS audio recordings, for which it yielded a test accuracy of 64%.
患有自闭症的儿童与他人交流有困难。在这项工作中,建立了一个语言情绪识别模型,以帮助自闭症谱系障碍(ASD)儿童识别社交互动中的情绪。该模型使用Python编程语言创建,开发基于支持向量机(SVM)的机器学习模型。在语音处理中,支持向量机的分类准确率很高。个人音频数据库是专门为训练模型而设计的,用于情感识别任务。其中一个这样的语音语料库是瑞尔森情感语音和歌曲视听数据库(RAVDESS),它在本工作中用于训练模型。声学特征提取将是使用Python库的预处理步骤的一部分。在这项工作中使用了libROSA库。提取前26个mel频率倒谱系数(MFCCs)和过零率(ZCR)作为声学特征来训练机器学习模型。最终的SVM模型提供了77%的测试精度。当RAVDESS音频记录中引入明显的背景噪声时,该模型也表现良好,测试准确率为64%。
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引用次数: 11
Various Structures and Control Strategies for Provisional Energy Transaction Management in Coupled Microgrid Clusters 耦合微电网集群临时能源交易管理的各种结构与控制策略
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249113
S. Ferdous, Farhad Shahnia, G. Shafiullah
An autonomous microgrid (MG) may observe overloading and renewable-based excessive generation. Such issues can lead to unacceptable deviation in the MG's voltage or frequency. These problems can be eased by load-shedding or renewable curtailment. On the other hand, forming provisional neighboring MG clusters and facilitating power exchange among them can also improve the situation more economically and effectively. The power exchange link between the MGs can be in the various forms such as a three-phase ac, a single-phase ac or a dc link. This approach requires power electronics-based converters to interlink the three-phase ac microgrid with the power exchange link and control the power-sharing amongst them. This paper has studied such structures and has proposed a decentralized approach to control the converters of the neighboring MGs to enable power-sharing amongst them. The performance of the proposed control mechanisms is evaluated through simulation studies in PSIM®.
自主微电网(MG)可能出现过载和可再生能源过度发电。这些问题可能导致MG的电压或频率出现不可接受的偏差。这些问题可以通过减载或弃用可再生能源来缓解。另一方面,形成临时的相邻MG集群,促进它们之间的权力交换,也可以更经济有效地改善这种状况。mg之间的电源交换链路可以采用各种形式,如三相交流、单相交流或直流链路。这种方法需要基于电力电子的转换器将三相交流微电网与电力交换链路互连,并控制它们之间的电力共享。本文对这种结构进行了研究,并提出了一种分散的方法来控制相邻mg的变换器,以实现它们之间的功率共享。通过PSIM®中的仿真研究评估了所提出的控制机制的性能。
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引用次数: 0
Parameter Identification and Fuzzy Logic Controller Design for a One-Stage Axial Flow Compressor System based on Moore-Greitzer Model 基于Moore-Greitzer模型的单级轴流压气机参数辨识及模糊控制器设计
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249210
Md Fahdul Wahab Chowdhury, M. Schoen, Ji-chao Li
This paper presents a novel approach to mitigate a long-standing instability problem in axial flow compressors. The instabilities known as stall and surge limits the operating range of these systems. Moore and Greitzer combined their work on modelling axial compressor systems, resulting into the Moore-Greitzer (MG) model. This model is built on the assumption of a specific compressor characteristic. However, the parameters of the characteristics are dependent on the compressor geometry and other factors. As each compressor exhibits different characteristics, the parameters of the characteristic equation of the MG model are not the same and difficult to estimate. Thus, the MG model is not suitable to provide a compressor's specific dynamics - rather it describes the general fluid dynamics of a compression system. Hence, addressing the fluid flow control problem using the MG model is difficult without the knowledge of the specific characteristics. In order to solve this problem, a new approach is proposed in this paper that allows for the extraction of a compressor's specific characteristic parameters using only experimental data. This approach employs a genetic algorithm-based optimization technique. The proposed approach is tested using simulated data from the MG model and experimental data from a one-stage axial compressor test system. The extracted parameters are then utilized to design a fuzzy logic controller for the specific one-stage axial compressor. The objective of the controller is to regulate the mass flow rate by varying the throttle of the compressor in order to maintain a specific operating point. The input into the controller is the error between the desired operating point and the actual operating point. The compressor - operating without control - becomes unstable at the maximum pressure rise coefficient. The operating point of the system is set just below the maximum pressure rise coefficient and the corresponding mass flow coefficient. From the simulation result of the pressure rise and mass flow coefficient, it is found that the compressor can be operated safely at this new operating point.
本文提出了一种解决轴流压气机长期存在的不稳定问题的新方法。失速和浪涌的不稳定性限制了这些系统的工作范围。Moore和Greitzer将他们在轴向压缩机系统建模方面的工作结合起来,形成了Moore-Greitzer (MG)模型。该模型建立在压缩机特定特性的假设基础上。然而,特性的参数取决于压缩机的几何形状和其他因素。由于各压气机的特性不同,MG模型的特征方程参数不相同,难以估计。因此,MG模型不适合提供压缩机的具体动力学,而是描述压缩系统的一般流体动力学。因此,在不了解具体特性的情况下,使用MG模型解决流体流动控制问题是困难的。为了解决这一问题,本文提出了一种新的方法,该方法允许仅使用实验数据提取压缩机的特定特征参数。该方法采用了基于遗传算法的优化技术。利用MG模型的仿真数据和单级轴流压气机试验系统的实验数据对该方法进行了验证。然后利用提取的参数,设计了针对特定单级轴流压气机的模糊控制器。控制器的目的是通过改变压缩机的节流阀来调节质量流量,以保持特定的工作点。控制器的输入是期望工作点与实际工作点之间的误差。压缩机在没有控制的情况下运行,在最大压升系数时变得不稳定。系统的工作点设置在最大压升系数和相应的质量流量系数的正下方。从压升和质量流量系数的模拟结果来看,压缩机在新的工作点上可以安全运行。
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引用次数: 1
Future of Free Space Communication Systems (FSCS): An Overview 自由空间通信系统(FSCS)的未来:综述
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249101
H. Kashif, M. Khan
Wireless communication systems become more demanding in the current era due to new bandwidth hungry applications: video-on-demand, online streaming, online sale, and purchase and cloud computing. High data rates applications increase the requirements for wireless capacity. The available radio and microwave frequency bands are dense enough to be used for launching additional high bandwidth applications. There is a dire requirement to have such a technology, which can fulfill the current demands. Optical communication is an emerging technology being used to overcome the scarcity of radio frequency (RF) spectrum. Optical technology has been vulnerable by its deteriorating links over long distances due to atmospheric turbulence and severe weather conditions as well as signal attenuation by external noise. In the paper, the focus is given on the detailed review of the free-space communication system (FSCS) and to evaluate the performance and to recommend for future communication systems. An analysis of the signal behavior affected by weather attenuation and atmospheric turbulence under different turbulent models is also developed. The main contribution of the article is to highlight the research gaps in the area of wireless communication and recommend FSCS as a future promising communication technology among the individual's optical and RF technologies.
无线通信系统在当前时代对带宽的要求越来越高,因为新的带宽需求巨大的应用:视频点播、在线流媒体、在线销售和购买以及云计算。高数据速率应用增加了对无线容量的要求。可用的无线电和微波频段足够密集,可以用于启动额外的高带宽应用。迫切需要这样一种能够满足当前需求的技术。光通信是一种新兴技术,用于克服射频频谱的稀缺性。由于大气湍流和恶劣天气条件以及外部噪声造成的信号衰减,光学技术在长距离传输过程中会出现链路恶化的问题,这使光学技术非常脆弱。本文对自由空间通信系统(FSCS)进行了详细的综述,并对其性能进行了评价,为未来的通信系统提供了建议。分析了不同湍流模式下天气衰减和大气湍流对信号行为的影响。本文的主要贡献是强调了无线通信领域的研究差距,并推荐FSCS作为个人光学和射频技术中有前途的通信技术。
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引用次数: 0
Placement and Sizing of EV Charging Stations According to Centrality of the Underlying Network 基于底层网络中心性的电动汽车充电站布局与规模
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249203
Hossein Parastvand, O. Bass, M. Masoum, Zeinab Moghaddam, S. Lachowicz, Airlie Chapman
EV placement and sizing are the subject of ever increasing studies in the last decade mostly relying on optimization approaches. This study looks at the EV network as a complex network where the nodes are the potential locations of charging stations (CSs) and edges (links) represent the traffic flow. It then investigates the impacts of some graph properties on the solutions of the CS placement problem. In fact, the graph centrality and its variants are used to find the locations of CSs to reduce the average waiting times at the stations. It is shown that the centrality based analysis can lead to promising results for small and medium EV networks leaving the large networks to be addressed by more complicated approaches. Simulations are performed on the central (downtown) part of Perth City EV network, Western Australia scaled down by the real traffic information.
在过去的十年中,电动汽车的布局和尺寸是越来越多的研究的主题,主要依赖于优化方法。本研究将电动汽车网络视为一个复杂的网络,其中节点是充电站(CSs)的潜在位置,边缘(链接)代表交通流量。然后研究了一些图属性对CS布局问题解的影响。事实上,图中心性及其变体被用来寻找CSs的位置,以减少车站的平均等待时间。结果表明,基于中心性的分析可以为中小型电动汽车网络带来有希望的结果,而大型电动汽车网络则需要采用更复杂的方法来解决。在西澳大利亚州珀斯市电动汽车网络的中心(市中心)部分进行了模拟,并按真实交通信息进行了缩小。
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引用次数: 1
A Houston Toad Call Detection Initial Approach Using Gated Recurrent Units for Conservational Efforts 采用门控循环单元的休斯顿蟾蜍呼叫检测初始方法
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249158
Shafinaz Islam, Damian Valles, M. Forstner
Conservation management of endangered amphibians requires efficient and consistent detection. Consequently, detection of species using automatic animal voice detection from audio recordings is a topic of interest in bioacoustics. This is necessary for amphibian population stewardship as well as assessing the health of those natural systems. The Houston Toad is an endangered chorusing amphibian species, and researchers of the Biology Department at Texas State University are working on a project to prevent its extinction. The researchers' initial approach is an Automated Recording Device (ARD), Toadphone-1, which is an embedded solution. It has shown limited success in identifying toad calls. If a species is not Houston Toad but has a frequency spectrum close to Houston Toad, then Toadphone-1 falsely identifies it as a Houston Toad. Hence, the current ARD solution produces high false-positives. This paper experimented with a modified software solution for existing ARD using 39 Mel-Frequency Cepstral Coefficients (MFCCs) with delta and delta-delta coefficients as audio features and Gated Recurrent Units (GRUs) as a classifier to detect Houston Toad. Results show that this experimented software solution produces 98.82% training accuracy and 97.50% validation accuracy. Test accuracy for detecting Houston Toad is 88.57%, which is approximately 20% greater than the accuracy presented by the existing software solution of Toadphone-1.
濒危两栖动物的保护管理需要有效和一致的检测。因此,从录音中自动检测动物的声音是生物声学中感兴趣的一个话题。这对于两栖动物种群管理以及评估这些自然系统的健康是必要的。休斯顿蟾蜍是一种濒临灭绝的两栖动物,德克萨斯州立大学生物系的研究人员正在进行一项防止其灭绝的项目。研究人员最初的方法是一种自动记录设备(ARD), Toadphone-1,这是一种嵌入式解决方案。它在识别蟾蜍叫声方面的成功有限。如果一个物种不是休斯顿蟾蜍,但有一个接近休斯顿蟾蜍的频谱,那么Toadphone-1错误地将其识别为休斯顿蟾蜍。因此,目前的ARD解决方案产生高假阳性。本文利用39个Mel-Frequency Cepstral Coefficients (MFCCs),以delta和delta-delta系数作为音频特征,门控循环单元(gru)作为分类器,对现有ARD进行了改进软件解决方案的实验,以检测Houston Toad。实验结果表明,该软件方案的训练准确率为98.82%,验证准确率为97.50%。检测休斯顿蟾蜍的测试准确率为88.57%,比现有的Toadphone-1软件解决方案的准确率提高了约20%。
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引用次数: 0
SEEdPODs: An Effective Vehicle for Engineering and Technology Education SEEdPODs:工程技术教育的有效载体
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249139
S. Moaveni, Krista Ruggles, K. Sohraby, V. Ilieva, Shelby Halm, Parker C. Fawson
SEEdPODs are mobile technology libraries for teachers and students at the elementary, middle/junior high and high school levels. An advanced version of this technology-based educational laboratory can also be offered as professional education and training for employees in industries. Utah Valley University's (UVU) College of Engineering and Technology (CET), in collaboration with the School of Education (SOE) and The Center for the School of the Future at Utah State University (USU), is providing laboratory projects and training opportunities for teachers as part of their professional development, and thus exposing K-12 students to college level education and trade career training.
SEEdPODs是面向小学、初中和高中教师和学生的移动技术图书馆。该技术教育实验室的高级版本还可以为工业员工提供专业教育和培训。犹他谷大学(UVU)工程技术学院(CET)与教育学院(SOE)和犹他州立大学(USU)未来学院中心合作,为教师提供实验室项目和培训机会,作为他们专业发展的一部分,从而使K-12学生接受大学水平的教育和贸易职业培训。
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引用次数: 0
Developing Student Rubrics For Creative Evaluation: Academic Research To Improve Student Learning Outcomes And Increase Faculty Grading Efficiency 为创造性评价制定学生标准:改善学生学习成果和提高教师评分效率的学术研究
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249207
Daniel Hatch, Seth Y. Christensen, E. Oliver
The experience of the digital media staff in alignment with a body of literature suggests the need for additional research for developing student rubrics for evaluating the creative works of students. A mixed-methods, action-research based intervention for evaluating how instructors may consistently grade and evaluate the creative works of students without subjectivity or bias between instructors. Additionally, these evaluations could have the intended outcome of improving learning outcomes for students across various courses with different faculty members. Without a more consistent delivery of content and evaluation of their work, students cannot perform equally from instructor to instructor. This paper reviews the theory, methodology, and study design through the use of quantitative scores and qualitative surveys to determine the efficacy of the intervention.
数字媒体工作人员的经验与大量文献一致,表明需要进行更多的研究,以制定评估学生创造性作品的学生标准。一种混合方法,基于行动研究的干预,用于评估教师如何在没有主观性或教师偏见的情况下始终如一地对学生的创造性作品进行评分和评估。此外,这些评估可以达到预期的效果,提高不同教师的不同课程的学生的学习成果。如果没有更一致的教学内容和对学生作业的评估,学生就不能在不同的老师之间表现得一样。本文回顾了理论、方法和研究设计,通过使用定量评分和定性调查来确定干预的有效性。
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引用次数: 0
Using Cinematographic Tools for Historic House Digital Restorations 使用电影摄影工具对历史建筑进行数字修复
Pub Date : 2020-10-02 DOI: 10.1109/IETC47856.2020.9249127
M. Snider
Digital architectural restorations, sometimes called virtual restorations, are three-dimensional computer models that are designed to reconstruct a historic structure in much the same way a physical restoration would. Using the existing architectural fabric and archival research, both methods speculate the structure and finishes of the original space. They can create wholly immersive environments that are populated with period furnishings, ephemera, people, and atmosphere in cases where original structures and objects which have been lost or destroyed, or where subsequent construction has altered the building. Computer software which is readily available and relatively inexpensive can be combined with the cinematographic techniques to produce visually dynamic re-created scenes that illustrate architectural spaces from the past for substantially smaller budgets.
数字建筑修复,有时被称为虚拟修复,是一种三维计算机模型,旨在以与物理修复大致相同的方式重建历史建筑。利用现有的建筑结构和档案研究,两种方法都推测了原始空间的结构和饰面。他们可以创造出完全沉浸式的环境,在原始结构和物体丢失或毁坏的情况下,他们可以创造出充满时代家具、蜉蝣、人物和氛围的环境。容易获得且相对便宜的计算机软件可以与电影技术相结合,以更少的预算制作视觉上动态的再现场景,展示过去的建筑空间。
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引用次数: 1
期刊
2020 Intermountain Engineering, Technology and Computing (IETC)
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