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Stock Price Prediction using Facebook Prophet 股票价格预测使用Facebook先知
Pub Date : 2022-11-18 DOI: 10.1051/itmconf/20224403060
Sumedh Kaninde, M. Mahajan, Aditya Janghale, Bharti Joshi
Estimating stock prices has always been a challenging task for researchers in the financial sector. Although the Efficient Market Hypothesis states that it is impossible to accurately predict stock prices, there is work in the literature that has shown that stock price movements can be predicted with the right level of accuracy, if the right variables are selected and appropriate predictor models are developed. those that are flexible. The Stock Market is volatile in nature and the prediction of the same is a cumbersome task. Stock prices depend upon not only economic factors, but they relate to various physical, psychological, rational and other important parameters. In this research work, the stock prices are predicted using Facebook Prophet. Stock price predictive models have been developed and run-on published stock data acquired from Yahoo Finance. Prophet is capable of generating daily, weekly and yearly seasonality along with holiday effects, by implementing regression models. The experimental results lead to the conclusion that Facebook Prophet can be used to predict stock prices for a long period of time with reasonable accuracy.
对金融领域的研究人员来说,估计股票价格一直是一项具有挑战性的任务。尽管有效市场假说指出,准确预测股票价格是不可能的,但文献中有研究表明,如果选择了正确的变量,并开发了适当的预测模型,股票价格变动可以以适当的精度进行预测。那些有弹性的。股票市场本质上是不稳定的,对其进行预测是一项繁琐的任务。股票价格不仅取决于经济因素,而且还与各种生理、心理、理性和其他重要参数有关。在本研究工作中,使用Facebook Prophet预测股票价格。股价预测模型已经开发出来,并从雅虎财经获得了持续发布的股票数据。先知是能够产生每日,每周和每年的季节性随着假期的影响,通过实施回归模型。实验结果得出结论,Facebook Prophet可以在很长一段时间内以合理的准确性预测股票价格。
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引用次数: 4
Aging mechanisms analysis of Graphite/LiNi0.80Co0.15Al0.05O2 lithium-ion batteries among the whole life cycle at different temperatures 不同温度下石墨/LiNi0.80Co0.15Al0.05O2锂离子电池全寿命周期老化机理分析
Pub Date : 2022-01-01 DOI: 10.1051/itmconf/20224703035
Weihua Luo, Xiaolong Yang, Sheng Qiao
Lithium-ion batteries (LIBs) are widely used in electric vehicles, while capacity fading happens due to unwanted side reactions during cycling. Therefore, it is of great significance to study the aging mechanisms of LIBs among the whole life cycle for the use and design of LIBs. In this study, the aging experiments of Graphite/LiNi0.80Co0.15Al0.05O2 (NCA) batteries were conducted at 25°C and 45°C, the aging mechanisms were examined by differential voltage analysis method and electrochemical impedance spectroscopy analysis method, and verified by microscopic morphology observation. The results show that the loss of anode active material and lithium ions are the main degradation modes, and the lithium plating side reaction at the late aging stage is the inducement of capacity plunge both at 25°C and 45°C. But the causes of lithium plating are different, at 25 °C, the growth of solid electrolyte interphase (SEI) leads to lithium plating, while at 45 °C, the accumulation of gas leads to lithium plating.
锂离子电池广泛应用于电动汽车中,但在循环使用过程中会产生不良的副反应,导致电池容量衰减。因此,研究lib全生命周期的老化机制对lib的使用和设计具有重要意义。本研究对石墨/LiNi0.80Co0.15Al0.05O2 (NCA)电池在25°C和45°C下进行了老化实验,通过差分电压分析方法和电化学阻抗谱分析方法对老化机理进行了研究,并通过微观形貌观察进行了验证。结果表明:在25℃和45℃下,阳极活性物质和锂离子的损失是主要的降解方式,时效后期的镀锂副反应是导致容量骤降的诱因。但镀锂的原因是不同的,在25℃时,固体电解质界面相(SEI)的生长导致镀锂,而在45℃时,气体的积聚导致镀锂。
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引用次数: 0
Drowsiness Detection using EEG signals and Machine Learning Algorithms 利用脑电图信号和机器学习算法检测睡意
Pub Date : 2022-01-01 DOI: 10.1051/itmconf/20224403030
Adinath Joshi, Atharva Kamble, Akanksha Parate, Siddhesh Parkar, D. Puri, Chandrakant J. Gaikwad
Drowsiness is described as a state of reduced consciousness and vigilance accompanied by a desire or want to sleep. Driver tiredness is frequently detected using wearable sensors that track vehicle movement and camera-based systems that track driver behavior. Many alternative EEG-based drowsiness detection systems are developed due to the potential of electroencephalogram (EEG) signals to observe human mood and the ease with which they may be obtained. This paper applies Deep learning architecture like Convolutional Neural networks (CNN) and algorithms for the classification of EEG data for Drowsiness Detection. The key measures of video-based approaches include the detection of physical features; nevertheless, problems such as brightness limitations and practical challenges such as driver attention limits its usefulness. The main measure of video-based methods is the degree of closure of the eyelids; however, its success is limited by constraints like as brightness restrictions and practical challenges such as driver distraction. We have extracted statistical features and trained using various classifiers like Logistic Regression, Naïve Bayes, SVM, and K Nearest Neighbours and compared the accuracy using a deep learning CNN model. Results demonstrate that CNN achieved an accuracy of 94.75% by delegating feature extraction on itself. Upon comparing existing state–of–the–art drowsiness detection systems, the testing results reveal a higher detection capability. The results show that the the suggested method can be used to develop a reliable EEG-based driving drowsiness detection system.
困倦被描述为一种意识和警觉性下降的状态,同时伴有想要睡觉的欲望。驾驶员疲劳通常通过跟踪车辆运动的可穿戴传感器和基于摄像头的跟踪驾驶员行为的系统来检测。由于脑电图(EEG)信号具有观察人类情绪的潜力,而且易于获得,因此开发了许多基于脑电图的睡意检测系统。本文应用卷积神经网络(CNN)等深度学习架构和算法对EEG数据进行分类,用于困倦检测。基于视频的方法的关键措施包括物理特征的检测;然而,诸如亮度限制和驾驶员注意力等实际挑战等问题限制了它的实用性。基于视频的方法的主要衡量标准是眼睑的闭合程度;然而,它的成功受到诸如亮度限制和驾驶员分心等实际挑战的限制。我们提取了统计特征,并使用各种分类器进行训练,如逻辑回归、Naïve贝叶斯、支持向量机和K近邻,并使用深度学习CNN模型比较了准确性。结果表明,CNN通过将特征提取委托给自己,准确率达到了94.75%。通过比较现有的最先进的睡意检测系统,测试结果显示出更高的检测能力。结果表明,该方法可用于开发可靠的基于脑电图的驾驶困倦检测系统。
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引用次数: 1
Android-based object recognition application for visually impaired 基于android的视障对象识别应用程序
Pub Date : 2021-07-11 DOI: 10.1051/itmconf/20214003001
Akilesh Salunkhe, Manthan Raut, Shayantan Santra, Sumedha Bhagwat
Detecting objects in real-time and converting them into an audio output was a challenging task. Recent advancement in computer vision has allowed the development of various real-time object detection applications. This paper describes a simple android app that would help the visually impaired people in understanding their surroundings. The information about the surrounding environment was captured through a phone’s camera where real-time object recognition through tensorflow’s object detection API was done. The detected objects were then converted into an audio output by using android’s text-to-speech library. Tensorflow lite made the offline processing of complex algorithms simple. The overall accuracy of the proposed system was found to be approximately 90%.
实时检测物体并将其转换为音频输出是一项具有挑战性的任务。计算机视觉的最新进展使得各种实时目标检测应用得以发展。这篇论文描述了一个简单的安卓应用程序,可以帮助视障人士了解他们周围的环境。通过手机摄像头捕捉周围环境的信息,通过tensorflow的对象检测API进行实时对象识别。然后使用android的文本到语音库将检测到的物体转换成音频输出。Tensorflow lite使复杂算法的离线处理变得简单。该系统的总体精度约为90%。
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引用次数: 3
Conception d’une séquence d’introduction dynamique du produit scalaire via une approche constructiviste intégrant la mécanique et les TIC 通过结合力学和信息通信技术的建构主义方法,设计标量积的动态引入序列
Pub Date : 2021-06-11 DOI: 10.1051/ITMCONF/20213901007
Khadija Raouf, Najia Benkenza, M’hamed El Aydi, Mohamed Anaya, Khalid Ennaciri
Le travail que nous présentons dans cet article vise la redynamisation de l’enseignement-apprentissage du produit scalaire via la conception d’une séquence d’introduction de cette notion au lycée et des modalités de sa mise en oeuvre par l’enseignant. Cet intérêt est justifié par le manque d’activités motivantes dans les manuels marocains que nous avons consultés et par le fait que la construction de cette notion mobilise des objets mathématiques susceptibles de cumuler des difficultés d’apprentissages telles que les notions de vecteur et de produit. La démarche adoptée dans cette recherche, se base sur le constructivisme comme théorie d’apprentissage, l’approche interdisciplinaire pour donner plus de sens aux savoirs construits et l’intégration de la géométrie dynamique permettant de conjecture du résultat dans sa généralité en couvrant tous les cas de figures possibles et la construction éventuelle des figures dynamiques par les apprenants. Ainsi ; nous avons choisi comme activité d’approche une situation authentique dont la résolution fait appel essentiellement à la notion de résultante de deux forces que les apprenants ont déjà abordée en mécanique, et aux notions de somme de deux vecteurs et le théorème de Pythagore vus en mathématiques.
本文提出的工作旨在通过在高中引入标量积概念的顺序设计和教师实施标量积的方法来振兴标量积的教学和学习。这种兴趣是合理的,因为我们查阅的摩洛哥教科书中缺乏激励活动,而且这个概念的构建调动了数学对象,这些对象可能会积累学习困难,如向量和乘积的概念。方法一样,这项研究是基于建构主义学习理论、跨学科办法采取更有意义的知识构建并允许动态几何化猜想的结果都在其普遍性,涵盖所有可能情况图和可能修建学习者的动态图。因此;我们选择了一个真实的情况作为方法活动,它的解决本质上依赖于学习者在力学中已经接触过的两种力的结果的概念,以及在数学中看到的两个向量和和毕达哥拉斯定理的概念。
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引用次数: 0
Change detection in non-stationary Hawkes processes through sequential testing 非平稳Hawkes过程的序列检测
Pub Date : 2021-01-26 DOI: 10.1051/ITMCONF/20213601005
Moinak Bhaduri, D. Rangan, Anurag Balaji
Detecting changes in an incoming data flow is immensely crucial for understanding inherent dependencies, formulating new or adapting existing policies, and anticipating further changes. Distinct modeling constructs have triggered varied ways of detecting such changes, almost every one of which gives in to certain shortcomings. Parametric models based on time series objects, for instance, work well under distributional assumptions or when change detection in specific properties - such as mean, variance, trend, etc. are of interest. Others rely heavily on the “at most one change-point” assumption, and implementing binary segmentation to discover subsequent changes comes at a hefty computational cost. This work offers an alternative that remains both versatile and untethered to such stifling constraints. Detection is done through a sequence of tests with variations to certain trend permuted statistics. We study non-stationary Hawkes patterns which, with an underlying stochastic intensity, imply a natural branching process structure. Our proposals are shown to estimate changes efficiently in both the immigrant and the offspring intensity without sounding too many false positives. Comparisons with established competitors reveal smaller Hausdorff-based estimation errors, desirable inferential properties such as asymptotic consistency and narrower bootstrapped margins. Four real data sets on NASDAQ price movements, crude oil prices, tsunami occurrences, and COVID-19 infections have been analyzed. Forecasting methods are also touched upon.
检测传入数据流中的更改对于理解固有依赖关系、制定新的或调整现有策略以及预测进一步的更改非常重要。不同的建模构造触发了检测这些变化的各种方法,几乎每一种方法都有一定的缺点。例如,基于时间序列对象的参数化模型在分布假设下或当对特定属性(如平均值、方差、趋势等)的变化检测感兴趣时工作得很好。其他算法严重依赖于“最多一个变化点”的假设,实现二值分割来发现后续的变化需要大量的计算成本。这项工作提供了另一种选择,既通用又不受这些令人窒息的限制。检测是通过对某些趋势排列统计的变化进行一系列测试来完成的。我们研究了非平稳Hawkes模式,它具有潜在的随机强度,暗示着一个自然的分支过程结构。我们的建议被证明可以有效地估计移民和后代强度的变化,而不会产生太多的误报。与已建立的竞争对手的比较揭示了更小的基于hausdorff的估计误差,理想的推理性质,如渐近一致性和更窄的自举边际。分析了纳斯达克价格走势、原油价格、海啸发生和COVID-19感染等4个真实数据集。预测方法也有涉及。
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引用次数: 0
SDN for IoT Environment: A Survey and Research Challenges 物联网环境下的SDN:调查与研究挑战
Pub Date : 1900-01-01 DOI: 10.1051/itmconf/20224201005
Kamaran H. Manguri, Saman M. Omer
Recently, it has emerged that both Internet of Things (IoT), and Software Defined Network (SDN) are becoming popular technologies. The main goal of IoT is to link electronic devices via the internet, meanwhile SDN facilitates network arrangement for management of a network by distinguishing the control layer and the data layer from each other. The number of electronic devices over the internet is increasing constantly, therefore it is a complicated process to manage and control especially over the huge distributed network. IoT network can be reasonably flexible and programmable through The SDN without introducing any trouble to the previously implemented network infrastructure. This paper reviews various IoT domains and applications such as cellular network, wireless Sensor, IoT management, security and smart city framework and common IoT SDN solutions. Moreover, The IoT and SDN notion has been explored critically, with assessing the current contributions in the research field. Lastly, analyzing current available solutions for SDN-based IoT implementations comparatively helps easily understanding the emerging trends view.
最近,物联网(IoT)和软件定义网络(SDN)正在成为流行的技术。物联网的主要目标是通过互联网将电子设备连接起来,同时SDN通过区分控制层和数据层,便于网络安排,便于对网络进行管理。互联网上的电子设备数量不断增加,因此管理和控制是一个复杂的过程,特别是在庞大的分布式网络中。物联网网络可以通过SDN实现合理的灵活性和可编程性,而不会给以前实现的网络基础设施带来任何麻烦。本文综述了蜂窝网络、无线传感器、物联网管理、安全和智慧城市框架以及常见的物联网SDN解决方案等物联网领域和应用。此外,对物联网和SDN概念进行了批判性探索,评估了研究领域当前的贡献。最后,分析当前基于sdn的物联网实现的可用解决方案有助于轻松理解新兴趋势视图。
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引用次数: 2
Concept of using structure magnonic crystal – ferroelectric – magnonic crystal as logic gate 结构磁振晶体-铁电-磁振晶体作为逻辑门的概念
Pub Date : 1900-01-01 DOI: 10.1051/itmconf/20193007008
O. Matveev, M. Morozova
The features of the propagation of spin waves in a composite multiferroic structure consisting of two magnonic crystals and a ferroelectric layer are considered. During the propagation of spin waves in such a structure, the formation of band gaps takes place, the position of which depends on the method of excitation of coupled structure and dielectric constant of ferroelectric. This effect can be taken as the basis for the operation of a logical element that allows implementing AND and OR operators. The results of theoretical and experimental studies of spin-wave processes in this structure are presented.
研究了由两个磁晶体和一个铁电层组成的复合多铁结构中自旋波的传播特性。自旋波在这种结构中传播时,会产生带隙,带隙的位置取决于耦合结构的激发方式和铁电介质常数。这种效果可以作为允许实现AND和OR运算符的逻辑元素的操作的基础。介绍了该结构中自旋波过程的理论和实验研究结果。
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引用次数: 0
A speed measuring system of hermetic centrifuge 一种密封离心机转速测量系统
Pub Date : 1900-01-01 DOI: 10.1051/itmconf/20224701018
Yifan Zhang, Liu Chong
Based on the detected vibration signal, a measurement system was designed to solve the current problem of closed centrifuge speed measurement. The system collected and adjusted the signal collected by the vibration sensor, and then send it to the control unit STM32 for spectrum analysis to get the speed frequency. The sampling data was analysed and processed in PC through serial communication. Programs were written to achieve data sampling, filtering and storage, and the important parameters such as acceleration waveforms, vibration frequency and actual speed were displayed on the screen. The experimental results show that the system can accurately calculate the real-time speed of the closed centrifuge according to the measured vibration signals, which has the advantages of high stability, detection accuracy and real-time performance.
根据检测到的振动信号,设计了一套测量系统,解决了目前闭式离心机转速测量的问题。系统对振动传感器采集到的信号进行采集和调整,然后送到控制单元STM32进行频谱分析,得到转速频率。采样数据在上位机中通过串行通信进行分析和处理。编写程序实现数据的采样、滤波和存储,并在屏幕上显示加速度波形、振动频率和实际转速等重要参数。实验结果表明,该系统能够根据实测的振动信号准确计算出闭式离心机的实时转速,具有稳定性高、检测精度高、实时性好的优点。
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引用次数: 0
LEAF DISEASE DETECTION OF CUCURBITS USING CNN 利用CNN检测葫芦叶病
Pub Date : 1900-01-01 DOI: 10.1051/itmconf/20214003043
Ishaan Agrawal, Prada Hegde, P. Shetty, Priyanka Shingane
Identification of plant disease is tough in agribusiness arena. If it is inaccurate, there occurs a tremendous damage in the production and economical price. Leaf Disease detection requires huge amount of work, knowledge, processing time in plant disease. The most used and edible vegetable all over the world is from cucurbitaceous family. The crops under this family have great economic value in the food industry and its production is done in large scale. This family consists of 965 species. If any of these plants catch disease then there would be a tremendous loss in the production of this field yields. Thus, treating them at early stage is best way to prevent such losses. Hence, Deep Learning Algorithm like CNN can be used to detect the diseases of the plants. The leaves of the plants would be used as primary material for identification of the disease, as they are much more visible on the leaves.
在农业领域,植物病害的鉴定是困难的。如果不准确,将对生产和经济价格造成巨大损失。在植物病害中,叶片病害检测需要大量的工作、知识和处理时间。葫芦科蔬菜是世界上使用最多、食用最多的蔬菜。该科作物在食品工业中具有较大的经济价值,生产规模较大。这个科有965种。如果这些植物中的任何一种染上了疾病,那么这片田地的产量就会受到巨大的损失。因此,早期治疗是防止此类损失的最好方法。因此,像CNN这样的深度学习算法可以用来检测植物的病害。植物的叶子将被用作鉴定疾病的主要材料,因为它们在叶子上更明显。
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引用次数: 2
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