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Electrical Distribution network service restoration in Smart grids using ACO-Fuzzy Approach 基于蚁群模糊算法的智能电网配电网服务恢复
A. Sharma, M. Jamil, Abdul Azeem
Smart cities form the benchmark for the futuristic engineering trends in the field of electrical distribution system. A futuristic venture into these Smart cities required a solution to most complex solution which shall going to be a challenge to the power engineers. The most reliable solution to these complex problems are the application of Artificial Intelligence in the most refine manner. Only the successful application of artificial intelligence techniques in the everyday use will form the backbone for these cities. This paper proposes an AI based algorithm for the application in the field of Electrical Distribution system. Ant colony based optimization algorithm is used to realize how the smart cities grid is going to respond to the contingencies arising in the distribution network. A fuzzy logic based input module is used for getting the best appropriate result for the optimization problem. The algorithm is applied on the IEEE 30 bus system within the Mi-Power software paradigm.
智慧城市是配电系统领域未来工程发展趋势的标杆。在这些智慧城市进行未来的冒险需要解决最复杂的解决方案,这对电力工程师来说将是一个挑战。这些复杂问题的最可靠的解决方案是以最精细的方式应用人工智能。只有人工智能技术在日常生活中的成功应用,才能成为这些城市的支柱。本文提出了一种基于人工智能的配电系统控制算法。采用蚁群优化算法实现智慧城市电网如何应对配电网中出现的突发事件。采用基于模糊逻辑的输入模块,得到优化问题的最优解。该算法在Mi-Power软件范例下的IEEE 30总线系统上得到了应用。
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引用次数: 0
An Optimized Fuzzy-based Load Balancing in Cloud Computing 云计算中一种优化的基于模糊的负载均衡
Mushtaq Ahmed, Madhav Khatri, Faisal Ahmed, Jitendra Goyal
In cloud computing, many resources are pooled together to help users operating in a distributed environment collaborate. A load balancer distributes Virtual Machines (VMs) to users in compliance with their required resources and tasks. Existing load balancing algorithms are insufficient for obtaining fast response times and better optimisation of cloud services and their resources when the load increases. Rule-based fuzzy inferences enable optimal resource utilisation by assigning user requests in the most efficient manner. This paper presents an Optimal Fuzzy-based Load Balancing (OFLB) model for efficient resource distribution. The proposed model employs memory, bandwidth, and disc space needs as fuzzy variables and implements categorization-based fuzzy constraints to improve performance. The tasks are assigned to virtual devices based on defined threshold values for membership functions. In the experiments, the OFLB is compared to other extant load-balancing algorithms in terms of memory, bandwidth and disc space utilisation. The analysis of the results shows that the OFLB-based modal improves the efficacy of the cloud system in terms of resource utilization by approximately 18% as compared to existing algorithms that distribute VMs.
在云计算中,许多资源被集中在一起,以帮助在分布式环境中操作的用户进行协作。负载均衡器根据用户需要的资源和任务分配虚拟机。现有的负载平衡算法不足以在负载增加时获得快速响应时间和更好地优化云服务及其资源。基于规则的模糊推理通过以最有效的方式分配用户请求来实现最佳的资源利用。提出了一种基于最优模糊的负载均衡(OFLB)模型,用于资源的高效分配。该模型采用内存、带宽和磁盘空间需求作为模糊变量,并实现基于分类的模糊约束以提高性能。根据定义的成员函数阈值将任务分配给虚拟设备。在实验中,将OFLB与其他现有的负载平衡算法在内存、带宽和磁盘空间利用率方面进行了比较。结果分析表明,与现有的vm分配算法相比,基于oflb的模式在资源利用率方面提高了云系统的效率约18%。
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引用次数: 0
Power System Contingency Analysis Using Improved Computational Techniques 基于改进计算技术的电力系统应急分析
Prahlad Mundotiya, Ankush Koli, Subhash Shrimal, Ch . Naga, Vikash Kumar Sharma, H. Tiwari
Transmission cables face significant challenges in today’s deregulated market due to load demand and the need to operate profitably. The utilization depends heavily on different outage situations. Line outages are graded according to their severity using Performance Index. The design of power systems makes them particularly prone to malfunction. Although it is challenging to forecast an unplanned power outage, it is essential to analyze potential failures and foresee their effects. The security of the electrical system can be assessed with the help of contingency analysis. To forecast the characteristics of the power system after any number of outages, single or multiple models are used. The major objective of this study is to identify critical double-line failures that, if they occurred, would lead to line flow violations in the power system. N2 contingency analysis is used to describe this. It takes a very long time to complete a thorough analysis of all conceivable N2 outcomes. An AC or DC power flow can be utilized to find significant double line outages without looking at all N2 possibilities. These results are contrasted with the entire AC power flow statistics. These methods can find many double-line outages that lead to line flow violations.
由于负载需求和盈利的需要,输电电缆在当今放松管制的市场中面临着重大挑战。利用率在很大程度上取决于不同的停机情况。使用性能指数对线路中断的严重程度进行分级。电力系统的设计使它们特别容易发生故障。尽管预测计划外停电具有挑战性,但分析潜在故障并预测其影响至关重要。通过应急分析,可以对电力系统的安全性进行评估。为了预测任意次数的停电后电力系统的特性,可以使用单个或多个模型。本研究的主要目的是确定关键的双线故障,如果它们发生,将导致电力系统中的线流违规。用N2权变分析来描述。完成对所有可能的N2结果的彻底分析需要很长时间。交流或直流潮流可以用来发现重大的双线停电,而无需查看所有N2可能性。这些结果与整个交流潮流统计数据进行了对比。这些方法可以发现许多导致线流违规的双线中断。
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引用次数: 0
Estimating the Stability of Smart Grids Using Optimised Artificial Neural Network 基于优化人工神经网络的智能电网稳定性评估
Akshita Singh, Pallavi Singh, Nehal Agrawal, Pankaj Gupta
The smart grid is a revolutionary and upsurging methodology for power supply. Smart grid has many advantages like reduced peak demand, inclusion of different energy sources, increase in the number of power suppliers, increased overall security and real time price prediction thus helping to optimize the power usage. Due to the inclusion of different renewable sources as prosumer (producer and consumer), a centralized system is not sufficient enough to dynamically predict the stability of the smart grid systems. In a centralized system, there is one directional flow of electricity and information. The local nodes are not autonomous and do not have a bi-directional flow of information, hence the prediction of price is time taking, fault detection and correction are also not fast. This paper considers decentralized system to predict the stability of the smart grid power supply which is dependent on the frequency of local nodes. The smart grid is said to be stable if the power generation matches the power demand and also there is a reserve to meet the power outage if it happens at any point of time. The paper considers an ANN model based on deep learning techniques and evaluates various factors to optimize its precision, such as the number of hidden layers, the number of nodes in each hidden layer, the appropriate optimizer and the right activation function. We have concluded the relationship between the predictive features and hidden layers, the use of ‘relu’, ‘sigmoid’ and ADAM as the optimized parameters for the ANN model for smart grid stability predictions.
智能电网是一种革命性的、新兴的电力供应方法。智能电网具有许多优点,如减少高峰需求,包括不同的能源,增加电力供应商的数量,提高整体安全性和实时价格预测,从而有助于优化电力使用。由于将不同的可再生能源作为产消者(生产者和消费者),集中式系统不足以动态预测智能电网系统的稳定性。在集中式系统中,电力和信息是单向流动的。局部节点不是自治的,没有双向的信息流动,因此价格的预测是耗时的,故障的检测和纠正也不是很快。本文考虑分散式系统对智能电网供电稳定性的预测,该预测依赖于局部节点的频率。如果发电量与电力需求相匹配,并且在任何时候都有备用电力来应对停电,那么智能电网就是稳定的。本文考虑了一个基于深度学习技术的人工神经网络模型,并评估了各种因素来优化其精度,如隐藏层的数量、每个隐藏层的节点数量、合适的优化器和正确的激活函数。我们总结了预测特征与隐藏层之间的关系,并使用“relu”、“sigmoid”和ADAM作为人工神经网络模型的优化参数进行智能电网稳定性预测。
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引用次数: 0
Effectiveness of Principal Component Analysis in Functional Mapping of Gene Expression Profiles 主成分分析在基因表达谱功能定位中的有效性
Rajashree Sahoo, R. Pradhan
Microarray experiments are proficient of yielding observations for thousands of genes those are differentially expressed under several conditions. Although it is possible to measure simultaneously the changes in gene expression profiles at whole genomic scale, interpreting individual gene expression profile in terms of its actual biological function or associated biochemical processes remains challenging. Exploratory multivariate statistical techniques such as principal component analysis have been extensively used to reduce the complexity of large size microarray data. Although Saccaromycea Cerevisae is the most widely studied species using microarray techniques, a complete understanding of the efficacy of principal component analysis and data pre-processing is still lacking for clustering and functional mapping of yeast gene expression profiles, reported in various studies. Therefore in this work, we evaluate the impact of data pre-processing and principal component analysis on k-means clustering-based functional mapping of yeast gene expression profiles observed during diauxic-shift. Two time-series gene expression datasets were chosen such as, (1) yeast diauxic-shift data and (2) yeast sporulation data to examine the efficacy of principal component analysis in interpreting gene-based or score-based clusters and their relationship with known pathways. It was shown that unlike conventional pre-processing, principal component analysis provides a powerful tool to capture most of the information using only two component variables for inferring gene expression time-course data. Using yeast genome databases, it was demonstrated that clustering with principal components instead of the original variables does not necessarily improve the cluster quality but helps in identifying the relationships between genes of a cluster and key biological process of diauxic shift. Overall, the present analysis is useful in mining high dimensional microarray data at a reduced computational cost associated with functional enrichment of expression time-series, regardless of species or experimental conditions.
微阵列实验能够熟练地对数千个在不同条件下差异表达的基因进行观察。虽然可以在全基因组尺度上同时测量基因表达谱的变化,但根据其实际的生物学功能或相关的生化过程来解释个体基因表达谱仍然具有挑战性。探索性多元统计技术,如主成分分析,已广泛用于降低大尺寸微阵列数据的复杂性。尽管酿酒sacaromycea Cerevisae是使用微阵列技术研究最多的物种,但各种研究报道,对于酵母基因表达谱的聚类和功能定位,主成分分析和数据预处理的有效性仍然缺乏完整的了解。因此,在这项工作中,我们评估了数据预处理和主成分分析对基于k均值聚类的酵母基因表达谱功能定位的影响。选择两个时间序列基因表达数据集,如(1)酵母双胞移位数据和(2)酵母产孢数据,以检验主成分分析在解释基于基因或基于分数的聚类及其与已知途径的关系方面的有效性。结果表明,与传统的预处理不同,主成分分析提供了一个强大的工具,可以仅使用两个成分变量来推断基因表达的时间过程数据。利用酵母基因组数据库,证明了主成分聚类而不是原始变量聚类不一定能提高聚类质量,但有助于识别聚类基因与双氧转移关键生物学过程之间的关系。总的来说,无论物种或实验条件如何,当前的分析在挖掘高维微阵列数据时都是有用的,并且与表达时间序列的功能富集相关的计算成本降低了。
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引用次数: 0
Impacts Assessment of Ultra-Fast EVs Charging Stations Integrated with Distribution Energy System and Mitigations Measures Using Online Controller 配能系统集成的超快电动汽车充电站影响评估及在线控制器缓解措施
Mohammad Amir, Suwaiba Mateen, Zaheeruddin, A. Haque
The concern about climate change and greenhouse gas emissions has resulted in a steady shift in the transportation sector from conventional fossil fuel-based combustion vehicles to electric vehicles. In the last decade only, the growth of electric vehicles (EVs) on the road has increased exponentially. The main drawback for widespread adoption, however, is range anxiety. Charging from an ultra-fast charging station (UFCS) solves this problem and makes EVs a worthwhile investment for manufacturers and customers. But UFCS comes with many technological constraints such as the requirement of high-capacity batteries, high-power charging converters and the grid impacts. In this paper, the negative grid impacts of UFCS, and power quality (PQ) problems of UFCS are summarized. The mitigation techniques are discussed and an online controller that works with open interfaces according to the international charging standards is proposed. A framework for optimized UFSC integrated with grid and distributed energy system is presented.
对气候变化和温室气体排放的担忧导致了交通运输行业从传统的化石燃料燃烧汽车向电动汽车的稳步转变。仅在过去十年中,道路上的电动汽车(ev)的增长就呈指数级增长。然而,广泛采用的主要缺点是里程焦虑。超快速充电站(UFCS)解决了这一问题,使电动汽车成为制造商和客户值得投资的产品。但ucs存在许多技术限制,例如对大容量电池、高功率充电转换器的要求以及对电网的影响。本文综述了ucs对电网的负面影响,以及ucs的电能质量问题。讨论了缓解技术,并根据国际收费标准提出了一种开放接口的在线控制器。提出了一种与电网和分布式能源系统相结合的UFSC优化框架。
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引用次数: 0
Cost-Effective early warning solution for Anisocoria Eye-Disease through Optical Sensing and Machine Learning: A Preliminary Analysis 基于光学传感和机器学习的低成本色差眼病预警解决方案:初步分析
M. M. Khan, Priyam Raj, Sanu Kumar
Anisocoria is the medical term associated when one of the pupil’s radius is not equal to the other one. This often leads to disease occurrence in the human eye when it remains undetected in its "silent" early phases. Therefore, this paper proposes a prototype of a low-cost early-warning anisocoria detection system by sensing and measuring the pupil diameter in the human eye. The unprocessed human-eye images were transformed to efficiently detect the pupil’s circumference using image binarization, leveling, and Hough transform techniques. Applying the machine learning (ML) algorithms using logistic regression, the model was trained and tested on the data set consisting of 75 random eye images. The prediction accuracy achieved was 81% when tested under red, green, blue, and ambient illumination. Furthermore, the proposed method was compared with the two other image processing methods, namely the Canny edge and Daugman algorithms, for optimum selection at the pre-ML stage. This method could prove to be a cost-effective solution for early diagnosis of anisocoria vis-a-vis database production to further accurate the proposed sensor system.
瞳孔半径不相等是一个医学术语。这往往导致疾病在人眼中发生,当它在其“沉默”的早期阶段未被发现时。为此,本文提出了一种基于人眼瞳孔直径感知与测量的低成本色差预警检测系统原型。利用图像二值化、调平和霍夫变换技术对未经处理的人眼图像进行变换,有效检测瞳孔周长。应用逻辑回归的机器学习(ML)算法,在由75张随机眼睛图像组成的数据集上对模型进行训练和测试。在红色、绿色、蓝色和环境照明下测试时,预测准确率达到81%。此外,将该方法与另外两种图像处理方法(Canny edge和Daugman算法)进行了比较,以便在ml前阶段进行最优选择。该方法可被证明是一种具有成本效益的解决方案,用于与数据库生产相关的异色虫的早期诊断,以进一步精确所提出的传感器系统。
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引用次数: 0
Mother Wavelet for Optimal Feature Analysis in Multiclass EEG Signals 基于母小波的多类脑电信号最优特征分析
N. Rafiuddin, Y. Khan, Omar Farooq
The aim of this study is to investigate the best type of mother wavelet capable of classifying multiple classes related to EEG. For instance, classification of the three brain states, namely seizure, pre-seizure (for seizure prediction), and normal states is an important part of the study in multiclass classification of epilepsy. In an attempt to yield the best mother wavelet, the study employs the MDWP approach by excavating through the wavelet packet tree up to the seventh level of decomposition, exploiting the wavelet coefficients on each level. The mother wavelets incorporated in the study are the commonly used wavelets, namely db4, sym5, coif4 and db2. Features were obtained by evaluating energy on all wavelet packets, which were further ranked using Naïve-Bayes classifier. Beginning with the feature ranked highest and progressively adding features with lower ranks one at a time, the classification results depicted in the form of patterns show the db4 mother wavelet to outperform others.
本研究的目的是探讨能够对脑电相关的多个类别进行分类的最佳母小波类型。例如,癫痫发作、癫痫前(用于预测癫痫发作)和正常状态三种大脑状态的分类是癫痫多类分类研究的重要组成部分。为了得到最好的母小波,本研究采用了MDWP方法,通过挖掘小波包树直到分解的第七个层次,利用每个层次上的小波系数。本研究纳入的母小波是常用的小波,即db4、sym5、coif4和db2。通过评估所有小波包上的能量得到特征,并使用Naïve-Bayes分类器对其进行进一步排序。从排名最高的特征开始,逐步添加排名较低的特征,以模式的形式描述的分类结果显示db4母小波优于其他小波。
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引用次数: 0
Human Emotion Recognition Models Using Machine Learning Techniques 使用机器学习技术的人类情感识别模型
Aftab Alam, S. Urooj, A. Q. Ansari
Researchers have always been curious if a computer can detect human emotions precisely and accurately. Many research publications have been reported on human-machine interaction systems. The emotion classifiers using machine learning techniques are developed using the feature dataset extracted from physiological and non-physiological parameters. Emotion recognition can be done either by using facial, speech or audio-visual data paths or using physiological signals like ECG, EEG, EMG, GSR and Respiration signals. Many have explored facial recognition techniques for emotion recognition but facial expressions can be masked. A sad person can pretend to have a smiling face and vice-versa. Physiological signals like ECG, EEG, GSR and respiration signals are non-maskable due to their involuntary source of generation. There are many datasets available publicly for researchers to use and develop an efficient emotion classifier system. In this work, the publicly available datasets of EEG, ECG and GSR recorded while watching emotional video are utilized to develop emotion classifiers using machine learning techniques. Here three physiological feature datasets named LUMED-2 (EEG+ GSR), SWELL (HRV), and YAAD (ECG+ GSR) are used to train models and classify emotions. The deep learning classifiers used are Random Forest, SVM, KNN, and/or Decision Tree. The maximum average classification accuracy achieved is close to 100% at least for one classifier in each dataset. It is observed that physiological signals like EEG, ECG, and GSR possess differentiable emotional features which can be used to detect the emotional state of a person precisely using the trained machine learning models.
研究人员一直很好奇计算机是否能准确无误地探测到人类的情绪。许多关于人机交互系统的研究报告已经发表。使用机器学习技术的情绪分类器是使用从生理和非生理参数中提取的特征数据集开发的。情绪识别既可以通过使用面部、语音或视听数据路径来完成,也可以使用ECG、EEG、EMG、GSR和呼吸信号等生理信号来完成。许多人已经探索了面部识别技术来识别情绪,但面部表情可以被掩盖。一个悲伤的人可以假装有一张笑脸,反之亦然。ECG、EEG、GSR、呼吸等生理信号由于其产生来源的非自愿性,是不可屏蔽的。有许多公开的数据集可供研究人员使用和开发有效的情感分类系统。在这项工作中,利用在观看情绪视频时记录的公开可用的EEG, ECG和GSR数据集,使用机器学习技术开发情绪分类器。本文使用LUMED-2 (EEG+ GSR)、SWELL (HRV)和YAAD (ECG+ GSR)三个生理特征数据集来训练模型并对情绪进行分类。使用的深度学习分类器有随机森林、支持向量机、KNN和/或决策树。对于每个数据集中的一个分类器,实现的最大平均分类精度接近100%。观察到EEG、ECG和GSR等生理信号具有可微分的情绪特征,可以使用训练好的机器学习模型精确地检测一个人的情绪状态。
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引用次数: 1
Comparative Study and Analysis of Electric and Dielectric Shielding 电屏蔽与介质屏蔽的比较研究与分析
K. Thenkumari, A. R. Prakhya, P. Niharika
This project aims to analyze the dielectric and electric shielding properties to ascertain the optimal shielding. Materials that have been applied range from being electrically non-conductive to conductive based on the application of them being either used as a conductor or as an insulator. This correlation had studied and analyzed in COMSOL Multiphysics software and variability of the capacitance and conductance for different blend of materials at different area fractions of the model that depends on the effective shielding of the EM waves respectively in the dielectric and electric shielding. However, electric and dielectric shielding serves for various purposes and are not directly comparable in terms of which is best. Amongst the materials that are available from the Software, a film made of Carbon nanotubes (CNTs) aerosol CVD; (nk 0.250-3.30 um) sized material produces the best shielding results for dielectric shielding and Copper, Nickel (solid, Annealed) blended material produces the best shielding results in case of electric shielding model.
本课题旨在分析介质和电屏蔽性能,以确定最佳屏蔽。所应用的材料根据其作为导体或绝缘体的应用范围,从不导电到导电。在COMSOL Multiphysics软件中研究和分析了这种相关性,并分析了不同材料混合在模型不同面积分数下的电容和电导的变化规律,这分别取决于介质和电屏蔽对电磁波的有效屏蔽。然而,电屏蔽和介质屏蔽用于各种目的,并不能直接比较哪一种是最好的。在软件中提供的材料中,由碳纳米管(CNTs)气溶胶CVD制成的薄膜;(nk 0.250-3.30 um)尺寸的材料对介电屏蔽产生最佳屏蔽效果,铜、镍(固体、退火)混合材料在电屏蔽模型的情况下产生最佳屏蔽效果。
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引用次数: 0
期刊
2023 International Conference on Recent Advances in Electrical, Electronics & Digital Healthcare Technologies (REEDCON)
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