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Impact of Behavioral Biases on Investors’ Stock Trading Decisions: A Comprehensive Quantitative Analysis 行为偏差对投资者股票交易决策的影响:综合定量分析
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i8.2845
Anurag Shukla, Manish Dadhich, Dipesh Vaya, Anuj Goel
Objective: This paper aims to investigate the impact of specified behavioral biases on investors' stock trading decisions in North India. It has been observed that most of the research works are based on financial theories, which affect investment decisions. But besides the theories nowadays, behavioral biases also play an important role in investment decisions, which was less focused in the previous literature. Methods: The study used primary data collected from a sample from North Indian States (Uttar Pradesh, Delhi, Haryana, and Punjab) through a structured questionnaire to analyze the impact of specified behavioral biases on investors' stock trading decisions. We used structural equation modelling to find out the significant impact of behavioral biases on stock trading and investment decisions. Findings: The investigation determined that the majority of the designated cognitive biases, such as the Overconfidence Bias, the Representativeness Bias, and the Herding Bias, exert a significant influence on the decisions about stock trading and investment made by investors. Novelty: The ample research in this domain has primarily occurred in various countries, with only a limited number of studies conducted specifically at the Indian level. Nevertheless, based on the literature review, it is evident that this study is groundbreaking in North India. The objective of this research is to enhance the effectiveness of financial advisors by gaining a deeper understanding of the psychological aspects of clients. This, in turn, will aid in developing portfolios tailored to individual behavior, aligning with client preferences. Recognizing and addressing behavioral biases is crucial for individual investors as they strive to make informed and successful financial decisions. Keywords: Behavioral Biases, Overconfidence (OC) bias, Representativeness Bias (RB), Herding Bias (HB), Structural Equation Modelling
研究目的本文旨在研究特定行为偏差对北印度投资者股票交易决策的影响。据观察,大多数研究工作都是基于影响投资决策的金融理论。但除了这些理论之外,行为偏差也在投资决策中发挥着重要作用,而以往的文献对此关注较少。研究方法本研究通过结构化问卷从北印度各邦(北方邦、德里、哈里亚纳邦和旁遮普邦)的样本中收集原始数据,分析特定行为偏差对投资者股票交易决策的影响。我们使用结构方程模型找出了行为偏差对股票交易和投资决策的重大影响。研究结果调查结果表明,大多数指定的认知偏差,如过度自信偏差、代表性偏差和羊群偏差,都对投资者的股票交易和投资决策产生了重要影响。新颖性:该领域的大量研究主要发生在不同国家,专门针对印度的研究数量有限。然而,根据文献综述,本研究在北印度显然具有开创性。本研究的目的是通过深入了解客户的心理层面,提高财务顾问的工作效率。这反过来又有助于根据客户的偏好,制定适合个人行为的投资组合。认识和解决行为偏差对个人投资者来说至关重要,因为他们要努力做出明智和成功的财务决策。关键词行为偏差 过度自信(OC)偏差 代表性偏差(RB) 羊群偏差(HB) 结构方程建模
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引用次数: 0
Frequency and Spatial Domain-Based Approaches for Recognition of Indian Sign Language Gestures 基于频率和空间域的印度手语手势识别方法
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.2836
B. V. Poornima, S. Srinath
Objectives: The objective of this paper is to introduce and demonstrate an innovative approach for the recognition of Indian sign language gestures, with a focus on bridging communication gap between the deaf and hearing communities. The goal is to contribute to the development of effective tools and technologies that facilitate seamless communication between individuals using sign language and the people with no knowledge about sign language. Methods: The methodology consists of three key steps. First, data pre-processing involves resizing and contours extraction. Next, feature extraction employs Fourier descriptors for frequency domain analysis and gray-level-co-occurrence matrix for spatial domain analysis. Finally, various machine learning models including SVM, Random Forest, Logistic Regression, K-Nearest Neighbor and Naive Bayes are trained on a standard dataset. Findings: In our controlled experimental setup, we applied a diverse set of machine learning classifiers to evaluate the proposed approach for gesture recognition. Among the classifiers tested, K-Nearest Neighbors demonstrated the highest accuracy, achieving 99.82%. To validate the robustness of our approach, we employed k-fold cross-validation with 5 folds. Novelty: This study presents an innovative method for sign language recognition by employing a dual-domain fusion strategy that prominently emphasizes the frequency domain. Through the integration of Fourier descriptors, the research conducts a detailed frequency domain analysis to characterize the contour shapes of sign language gestures. The synergy with gray-level co-occurrence matrix texture features in the spatial domain analysis, contributes to the creation of a comprehensive feature vector. The proposed approach ensures a thorough exploration of gesture features, there by advancing the precision and efficacy of sign language recognition. Keywords: Indian Sign Language (ISL), Sign Language Recognition (SLR), Frequency domain, Spatial domain, Fourier descriptors, Gray level co­occurrence matrix (GLCM), K­ Fold
目的:本文旨在介绍和演示一种识别印度手语手势的创新方法,重点是缩小聋人和听人群体之间的沟通差距。其目的是促进有效工具和技术的开发,从而促进使用手语的人与不懂手语的人之间的无缝交流。方法:方法包括三个关键步骤。首先,数据预处理包括调整大小和提取轮廓。其次,特征提取采用傅立叶描述符进行频域分析,采用灰度级共现矩阵进行空间域分析。最后,在标准数据集上训练各种机器学习模型,包括 SVM、随机森林、逻辑回归、K-Nearest Neighbor 和 Naive Bayes。研究结果在受控实验设置中,我们应用了多种机器学习分类器来评估所提出的手势识别方法。在测试的分类器中,K-近邻分类器的准确率最高,达到 99.82%。为了验证我们方法的鲁棒性,我们采用了 5 次 k 倍交叉验证。新颖性:本研究提出了一种创新的手语识别方法,它采用了一种突出频域的双域融合策略。通过整合傅立叶描述符,该研究进行了详细的频域分析,以描述手语手势的轮廓形状。在空间域分析中,与灰度级共现矩阵纹理特征协同作用,有助于创建全面的特征向量。所提出的方法确保了对手势特征的深入探索,从而提高了手语识别的精度和效率。关键词印度手语(ISL)、手语识别(SLR)、频域、空间域、傅立叶描述符、灰度共生矩阵(GLCM)、K 折叠
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引用次数: 0
Machine Learning-based Inverse Design Model of a Transistor 基于机器学习的晶体管逆向设计模型
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.3076
Abhilipsa Sahoo, Kaushika Patel
Objectives: To develop an inverse design model for transistors, utilizing machine learning algorithms to predict key design parameters specifically, the length and width based on specified gain and bandwidth requirements. And to conduct a comprehensive comparative analysis with existing literature, evaluating the efficacy and novelty of the proposed model in the context of semiconductor engineering challenges and methodologies. Methods: The comprehensive dataset, comprising 30,000 values generated through LTspice simulations, forms the basis for training the machine learning model. Utilizing a Random Forest regressor as the base model and a multi-output regressor as the main model, the project involves extensive data analysis, model development, and iterative fine-tuning. Findings: The outcomes demonstrate the efficacy of the developed model in accurately predicting transistor dimensions. Performance metrics, including Mean Absolute Error (MAE), Mean Squared Error (MSE), and R-squared, highlight the precision of the model in fulfilling the specified objectives. Novelty: This study introduces a novel approach to semiconductor device design optimization, showcasing the potential of machine learning to streamline the inverse design process. The use of a multi-output regressor, feature engineering, and fine-tuning through log transformation contribute to the innovative nature of the developed model. Keywords: Machine Learning (ML) model, Random Forest regressor, multi­output regressor, Feature engineering, Fine­tuning
目标:开发晶体管反向设计模型,利用机器学习算法预测关键设计参数,特别是基于指定增益和带宽要求的长度和宽度。并与现有文献进行全面的比较分析,根据半导体工程面临的挑战和方法,评估所提出模型的有效性和新颖性。研究方法由 LTspice 仿真生成的 30,000 个值组成的综合数据集是训练机器学习模型的基础。利用随机森林回归器作为基础模型,多输出回归器作为主要模型,该项目涉及广泛的数据分析、模型开发和迭代微调。研究结果结果表明,所开发的模型在准确预测晶体管尺寸方面非常有效。包括平均绝对误差 (MAE)、平均平方误差 (MSE) 和 R 平方在内的性能指标突出显示了模型在实现特定目标方面的精确性。新颖性:这项研究为半导体器件设计优化引入了一种新方法,展示了机器学习简化反向设计过程的潜力。多输出回归器、特征工程和通过对数变换进行微调等方法的使用为所开发模型的创新性做出了贡献。关键词机器学习(ML)模型、随机森林回归器、多输出回归器、特征工程、微调
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引用次数: 0
Selecting Optimal Path in Multiple-Path Routing for MANETs Using Fuzzy Cost 利用模糊成本在城域网多路径路由中选择最优路径
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.3006
N. Sasikala, K. P. K. Rao, K. Shanker
Background/ Objectives: Mobile Ad Hoc Networks (MANETs) consists of a set of nodes, where the nodes tend to change their positions time to time because of their infrastructure less characteristic. In MANETs, the protocol that is considered to be the appropriate for constructing an efficient route is AODV. Broadcast storm is another approach that can be used for establishing a path between the sender and receiver. Due to the concerns related to contention and collision, broadcast is not considered as an efficient mechanism for path selection. Though the aim of broadcasting is to minimize the flooding other issues like bandwidth consumption, collision and contention cannot be controlled. Since MANETs are associated with inadequate bandwidth, the approach of broadcasting is not efficient. Multipath routing approach permits in constructing multiple paths between the communicating nodes (sender and receiver). This approach is complicated due to the problem of node mobility in MANETs. The other paths available are not reliable because of the ad hoc nature of MANETs. The intention is to design a fuzzy controller that assists in reducing the reconstruction of paths using fuzzy cost assigned to each node in the network. Methods: The concept of this paper is to establish an optimal path from sender node to the receiver node from the available multiple paths in MANETs. The path established in this approach uses fuzzy cost. Fuzzy measure is the criteria used for establishing a path. The concept ImRMR used in this paper has been included with few improvements. The basic functionality of ImRMR is that paths are classified based on rank fitness. The proposal is to classify the paths based on its fuzzy cost. This fuzzy cost classifies the paths fitness. Findings: The proposed fuzzy cost approach discussed in this study is compared with On-Demand Multicast Routing Protocol (ODMRP). The result exhibits that the proposed method works better under differing conditions like traffic load, transmission range between nodes and also considers node mobility. The proposed mechanism with inclusion of fuzzy cost shows 5% energy efficiency, reduces the collisions by about 35% and throughput is enhanced by 30%. There has been a considerable decrease in the number of queries by 23%. The simulation results indicate that ODMRP with fuzzy cost is more useful and significant. Hence, consideration of fuzzy cost as a means for selecting an effective route is assumed to be the best. Novelty: This method contributes in reducing the drawbacks of routing approaches whether it is unipath and multi-path approach. The proposed approach changes the value of the attributes for a given route with fuzzy cost. A threshold value will be considered initially and the route having a cost more than the initialized threshold would be advised as the best route. This route would be considered as the efficient route for transmission between the sender and the receiver. Keywords: Uni­path, multiple paths,
背景/目标:移动 Ad Hoc 网络(MANET)由一组节点组成,由于其基础设施较少的特点,节点往往会不时地改变自己的位置。在城域网中,AODV 协议被认为是最适合构建高效路由的协议。广播风暴是另一种可用于在发送方和接收方之间建立路径的方法。由于与争用和碰撞有关的问题,广播不被认为是一种有效的路径选择机制。虽然广播的目的是尽量减少泛洪,但带宽消耗、碰撞和争用等其他问题却无法控制。由于城域网带宽不足,广播方法并不有效。多路径路由方法允许在通信节点(发送方和接收方)之间构建多条路径。由于城域网中的节点移动性问题,这种方法比较复杂。由于城域网的临时性,其他可用路径并不可靠。我们的目的是设计一种模糊控制器,利用分配给网络中每个节点的模糊成本,帮助减少路径的重建。方法:本文的概念是从城域网中可用的多条路径中建立一条从发送方节点到接收方节点的最优路径。该方法使用模糊成本建立路径。模糊度量是建立路径的标准。本文使用的 ImRMR 概念经过了一些改进。ImRMR 的基本功能是根据等级适合度对路径进行分类。本文的建议是根据模糊成本对路径进行分类。该模糊成本可对路径适合度进行分类。研究结果本研究中讨论的拟议模糊成本法与按需多播路由协议(ODMRP)进行了比较。结果表明,在不同的条件下,如流量负载、节点间的传输距离以及节点的移动性,所提出的方法效果更好。包含模糊成本的拟议机制显示出 5% 的能源效率,减少了约 35% 的碰撞,吞吐量提高了 30%。查询次数大幅减少了 23%。模拟结果表明,带有模糊成本的 ODMRP 更有用、更重要。因此,将模糊成本作为选择有效路线的一种手段是最好的。新颖性:这种方法有助于减少单路径和多路径路由方法的缺点。建议的方法通过模糊成本改变给定路由的属性值。最初将考虑一个阈值,成本高于初始化阈值的路由将被推荐为最佳路由。该路径将被视为发送方和接收方之间传输的有效路径。关键词单路径、多路径、模糊成本、模糊适配度、等级适配度
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引用次数: 0
A Hybrid Approach to Analyse the Public Sentiment on Covid-19 Tweets 分析 Covid-19 微博公众情绪的混合方法
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.3017
Radha Krishna Jana, Dharmpal Singh, Saikat Maity, Hrithik Paul
Objectives: The objective of this study is to introduce a hybrid model for analyzing the people sentiment on covid-19 tweets. Methods: We used a total no. of 27,500 datasets, 70% of the data sets for training and reserved the other 30% for testing. Due to this separation 19,250 samples are used for training, the remaining 8,250 were used to evaluate the accuracy of the test. This paper proposes a technique for sentiment analysis that integrates deep learning, genetic algorithms (GA), and social media sentiment. For more accuracy and performance, we here suggested a hybrid genetic algorithm-based model. A hybrid model is created by assembling the LSTM model and providing it to the genetic algorithm architecture. Findings: LSTM with a genetic model better than LSTM without genetic model. The accuracy of our suggested model is 96.40%. Novelty : The accuracy of the LSTM model for sentiment analysis is 91%. The accuracy of the proposed model is 96.40%. The proposed model is more accurate for sentiment prediction. Keywords: Social network perception, Crossover, Mutation, LSTM, NLP, GA
研究目的本研究旨在引入一种混合模型,用于分析 covid-19 微博上的人们情感。研究方法我们共使用了 27500 个数据集,其中 70% 用于训练,另外 30% 用于测试。其中 19,250 个样本用于训练,其余 8,250 个样本用于评估测试的准确性。本文提出了一种整合了深度学习、遗传算法(GA)和社交媒体情感的情感分析技术。为了提高准确性和性能,我们在此提出了一种基于遗传算法的混合模型。混合模型是通过组装 LSTM 模型并将其提供给遗传算法架构而创建的。研究结果带有遗传模型的 LSTM 优于不带遗传模型的 LSTM。我们建议的模型准确率为 96.40%。新颖性:用于情感分析的 LSTM 模型的准确率为 91%。建议模型的准确率为 96.40%。建议的模型在情感预测方面更加准确。关键词社交网络感知、交叉、突变、LSTM、NLP、GA
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引用次数: 0
Study of Active Medium Length Effect on Characteristics of Passive QSwitching and Stokes with Anti-Stokes Pulse 研究有源介质长度对无源 QSwitching 和斯托克斯与反斯托克斯脉冲特性的影响
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i8.2823
Dunya Saad Hussein, Abdul-Kareem Mahdi Salih
Objective: To study the effect of active medium length on the characteristics of passive Q-switching pulses, Stokes pulses, and anti-Stokes pulses generated by laser-Raman medium interaction in optical systems, theoretically. Methods: The optical system consists of Nd+3:YVO4, PbWO4, and Cr+4:YAG as active mediums, Raman medium, and saturable absorber materials, respectively. The rate equations model has been used in the study, and the Rung-Kutta-Fehelberg numerical method was used to solve the rate equations. Finding: The result shows that, decreasing of the active medium length leads to emit high power pulses at advanced time. It also leads to increase in initial value and the maximum value of population inversion density, and leads to increase in the energy of passive Q-switching pulses, Stokes pulses, and anti-Stokes pulses. So the decreasing of the active medium length leads to decrease in the pulses duration and the final population inversion density. To increase the power of the three generated pulses, the length of the active medium used in the system must be decreased. Novelty: The characteristics of two pulses generated by Laser-Raman interaction (passive Q-switching pulse and Stokes pulse) have been of interest in some studies. This study investigates the effect of the active medium length on the characteristics of three pulses generated (anti-Stokes pulse with Stokes pulse as well as the passive Q-switching pulses) by the optical system rather than two pulses. Keywords: Laser; Nd+3 :YVO4; passive Q-­switching pulse; Stokes and anti-­Stokes pulses 1
目的从理论上研究有源介质长度对光学系统中激光与拉曼介质相互作用产生的无源 Q 开关脉冲、斯托克斯脉冲和反斯托克斯脉冲特性的影响。研究方法光学系统由 Nd+3:YVO4、PbWO4 和 Cr+4:YAG 分别作为有源介质、拉曼介质和可饱和吸收材料组成。研究采用了速率方程模型,并使用 Rung-Kutta-Fehelberg 数值方法求解速率方程。研究结果研究结果表明,活性介质长度的减小会导致高功率脉冲的提前发射。它还会导致种群反转密度的初始值和最大值增加,并导致被动 Q 开关脉冲、斯托克斯脉冲和反斯托克斯脉冲的能量增加。因此,主动介质长度的减少会导致脉冲持续时间和最终种群反转密度的降低。要提高这三种脉冲的功率,就必须减少系统中使用的有源介质的长度。新颖性: 激光-拉曼相互作用产生的两种脉冲(被动 Q 开关脉冲和斯托克斯脉冲)的特性一直是一些研究的兴趣所在。本研究探讨了有源介质长度对光学系统产生的三个脉冲(反斯托克斯脉冲与斯托克斯脉冲以及被动 Q 开关脉冲)特性的影响,而不是两个脉冲。关键词激光;Nd+3 :YVO4;无源 Q 开关脉冲;斯托克斯脉冲和反斯托克斯脉冲 1
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引用次数: 0
Selecting Optimal Path in Multiple-Path Routing for MANETs Using Fuzzy Cost 利用模糊成本在城域网多路径路由中选择最优路径
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.3006
N. Sasikala, K. P. K. Rao, K. Shanker
Background/ Objectives: Mobile Ad Hoc Networks (MANETs) consists of a set of nodes, where the nodes tend to change their positions time to time because of their infrastructure less characteristic. In MANETs, the protocol that is considered to be the appropriate for constructing an efficient route is AODV. Broadcast storm is another approach that can be used for establishing a path between the sender and receiver. Due to the concerns related to contention and collision, broadcast is not considered as an efficient mechanism for path selection. Though the aim of broadcasting is to minimize the flooding other issues like bandwidth consumption, collision and contention cannot be controlled. Since MANETs are associated with inadequate bandwidth, the approach of broadcasting is not efficient. Multipath routing approach permits in constructing multiple paths between the communicating nodes (sender and receiver). This approach is complicated due to the problem of node mobility in MANETs. The other paths available are not reliable because of the ad hoc nature of MANETs. The intention is to design a fuzzy controller that assists in reducing the reconstruction of paths using fuzzy cost assigned to each node in the network. Methods: The concept of this paper is to establish an optimal path from sender node to the receiver node from the available multiple paths in MANETs. The path established in this approach uses fuzzy cost. Fuzzy measure is the criteria used for establishing a path. The concept ImRMR used in this paper has been included with few improvements. The basic functionality of ImRMR is that paths are classified based on rank fitness. The proposal is to classify the paths based on its fuzzy cost. This fuzzy cost classifies the paths fitness. Findings: The proposed fuzzy cost approach discussed in this study is compared with On-Demand Multicast Routing Protocol (ODMRP). The result exhibits that the proposed method works better under differing conditions like traffic load, transmission range between nodes and also considers node mobility. The proposed mechanism with inclusion of fuzzy cost shows 5% energy efficiency, reduces the collisions by about 35% and throughput is enhanced by 30%. There has been a considerable decrease in the number of queries by 23%. The simulation results indicate that ODMRP with fuzzy cost is more useful and significant. Hence, consideration of fuzzy cost as a means for selecting an effective route is assumed to be the best. Novelty: This method contributes in reducing the drawbacks of routing approaches whether it is unipath and multi-path approach. The proposed approach changes the value of the attributes for a given route with fuzzy cost. A threshold value will be considered initially and the route having a cost more than the initialized threshold would be advised as the best route. This route would be considered as the efficient route for transmission between the sender and the receiver. Keywords: Uni­path, multiple paths,
背景/目标:移动 Ad Hoc 网络(MANET)由一组节点组成,由于其基础设施较少的特点,节点往往会不时地改变自己的位置。在城域网中,AODV 协议被认为是最适合构建高效路由的协议。广播风暴是另一种可用于在发送方和接收方之间建立路径的方法。由于与争用和碰撞有关的问题,广播不被认为是一种有效的路径选择机制。虽然广播的目的是尽量减少泛洪,但带宽消耗、碰撞和争用等其他问题却无法控制。由于城域网带宽不足,广播方法并不有效。多路径路由方法允许在通信节点(发送方和接收方)之间构建多条路径。由于城域网中的节点移动性问题,这种方法比较复杂。由于城域网的临时性,其他可用路径并不可靠。我们的目的是设计一种模糊控制器,利用分配给网络中每个节点的模糊成本,帮助减少路径的重建。方法:本文的概念是从城域网中可用的多条路径中建立一条从发送方节点到接收方节点的最优路径。该方法使用模糊成本建立路径。模糊度量是建立路径的标准。本文使用的 ImRMR 概念经过了一些改进。ImRMR 的基本功能是根据等级适合度对路径进行分类。本文的建议是根据模糊成本对路径进行分类。该模糊成本可对路径适合度进行分类。研究结果本研究中讨论的拟议模糊成本法与按需多播路由协议(ODMRP)进行了比较。结果表明,在不同的条件下,如流量负载、节点间的传输距离以及节点的移动性,所提出的方法效果更好。包含模糊成本的拟议机制显示出 5% 的能源效率,减少了约 35% 的碰撞,吞吐量提高了 30%。查询次数大幅减少了 23%。模拟结果表明,带有模糊成本的 ODMRP 更有用、更重要。因此,将模糊成本作为选择有效路线的一种手段是最好的。新颖性:这种方法有助于减少单路径和多路径路由方法的缺点。建议的方法通过模糊成本改变给定路由的属性值。最初将考虑一个阈值,成本高于初始化阈值的路由将被推荐为最佳路由。该路径将被视为发送方和接收方之间传输的有效路径。关键词单路径、多路径、模糊成本、模糊适配度、等级适配度
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引用次数: 0
Microstructural and Mechanical Characterization of the Mg Based Functionally Graded Material Fabricated through Centrifugal Casting Process 通过离心铸造工艺制作的镁基功能分级材料的微观结构和力学特征
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.2828
M Anil Kumar, V. Srinivasan, P. R. Raju
Objectives: The aim of this study is to examine the mechanical and microstructural properties of functionally graded material (FGM) composites based on magnesium (Mg). Magnesium alloys are commonly employed in the development of biomaterials for implant applications owing to their favorable corrosion properties. The research objective is to study the microstructural and mechanical properties and produce Zn/Mo reinforced functionally graded magnesium composites using the centrifugal casting. Methods: A triple layered cylindrical shaped Mg based functionally graded material (FGM) was fabricated through a centrifugal process from (Mg (80%) +Zn (10%) + Mo (10%) alloy. The developed FGMs have been analyzed for their mechanical and microstructural characteristics. The microstructure was analyzed via the OM AND SEM microscope. It is identified that denser particle molybdenum (Mo) have influenced the mechanical and microstructural characteristics. Findings: Results recommend that, all the three layered testing’s, Mg (80%) +Zn (10%) + Mo (10%) composite exhibited favorable mechanical and microstructural properties. It is identified that denser particle of Mo which is influenced the microstructural characteristics. The alteration in micro hardness in the direction of centrifugal force is observed, and it is perceived that top surface has higher hardness as compared to the middle and bottom region. The flexural strength of top surface sample is 254 MPa, which is 10% greater than middle surface sample and 12.36% greater than bottom surface sample. Compressive strength of 385 MPa, surpassing the middle surface sample by 17.11% and the bottom surface sample by 19.36%. Novelty: In this study, a novel three-layered centrifugal casting technique was devised. Owing to its rapid degradability, the anticipated duration of the implants within the human body is significantly shorter in comparison to alternative biomaterials such as Titanium and Stainless steel. Furthermore, the findings from the conducted tests strongly advocate for the utilization of this technique in biomedical implantations. Keywords: Functionally graded material (FGM), Centrifugal casting, Mechanical properties, Microstructural behavior and bioimplants
研究目的本研究旨在探讨基于镁(Mg)的功能分级材料(FGM)复合材料的机械和微观结构特性。由于镁合金具有良好的腐蚀性能,因此常用于开发植入应用的生物材料。研究目的是研究微观结构和机械性能,并利用离心铸造法生产 Zn/Mo 增强功能分级镁复合材料。研究方法通过离心工艺,利用镁(80%)+锌(10%)+钼(10%)合金制造出三层圆柱形镁基功能分级材料(FGM)。对所开发的 FGM 进行了机械和微观结构特性分析。微观结构通过光学显微镜和扫描电镜进行分析。结果表明,较密集的钼(Mo)颗粒影响了其机械和微观结构特征。研究结果:结果表明,所有三层测试、镁(80%)+锌(10%)+钼(10%)复合材料都表现出良好的机械和微观结构特性。结果表明,密度较大的钼颗粒影响了微结构特性。观察到微观硬度在离心力方向上的变化,与中间和底部区域相比,上表面的硬度更高。顶面样品的抗弯强度为 254 兆帕,比中间表面样品高 10%,比底面样品高 12.36%。抗压强度为 385 兆帕,比中间表面样品高出 17.11%,比底部表面样品高出 19.36%。新颖性:本研究设计了一种新颖的三层离心浇铸技术。由于其快速降解性,与钛和不锈钢等其他生物材料相比,植入物在人体内的预期持续时间大大缩短。此外,测试结果也有力地证明了这种技术在生物医学植入中的应用。关键词功能分级材料(FGM)、离心铸造、机械性能、微结构行为和生物植入物
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引用次数: 0
Optimal Location of EV Charging Stations in the Distribution System Considering GWO Algorithm 采用 GWO 算法优化配电系统中的电动汽车充电站位置
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i8.2044
Sai Goutham Golive, B. Paramasivam, J. Ravindra
Objectives: The transition from conventional vehicles to electric vehicles (EVs) has been significantly influenced by the current scarcity of fossil fuels and the environmental concerns surrounding greenhouse gas emissions. The exploration of the optimal location of electric vehicle charging stations has been prompted by the electrification of the transportation system and the increasing demand for EVs. Methods: One of the main challenges is the detrimental impact of improper positioning of charging stations on the power distribution network. The Grey Wolf Optimization (GWO) approach is used to determine the effective Charging Stations (CS) locations to minimize the losses, which is the major objective of the proposed technique. An IEEE 33 bus system is used to implement the suggested technique. Findings : The proposed method finds the suitable deployments for EVCS within the distribution system, which is of utmost importance due to the constraints imposed by limited battery capacity and prolonged charging periods. This article proposes the optimal location for EVCS to minimize losses inside the distribution network. Novelty: The effectiveness of the proposed GWO is evaluated by comparing it with the PSO optimal algorithm. Finally, a comparison of system voltage and nominal voltage is presented and the probability comparison of EV location with the base case and the proposed algorithms is presented. Keywords: Electric Vehicle Charging Station, Distribution System, GWO, System and Nominal Voltage
目标:从传统汽车向电动汽车(EV)的过渡受到了当前化石燃料稀缺和围绕温室气体排放的环境问题的重大影响。交通系统的电气化和对电动汽车日益增长的需求促使人们探索电动汽车充电站的最佳位置。方法:主要挑战之一是充电站位置不当对配电网络的不利影响。灰狼优化(GWO)方法用于确定有效的充电站(CS)位置,以最大限度地减少损耗,这也是所提技术的主要目标。建议的技术采用了 IEEE 33 总线系统。研究结果:由于电池容量有限和充电时间延长等限制因素,建议的方法能在配电系统中为电动汽车充电站找到合适的部署位置,这一点至关重要。本文提出了 EVCS 的最佳位置,以尽量减少配电网内的损耗。新颖性:通过与 PSO 优化算法进行比较,评估了所提出的 GWO 的有效性。最后,对系统电压和额定电压进行了比较,并对电动汽车位置与基本情况和所提算法进行了概率比较。关键词电动汽车充电站、配电系统、GWO、系统电压和额定电压
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引用次数: 0
Utilizing Machine Learning for Comprehensive Analysis and Predictive Modelling of IPL-T20 Cricket Matches 利用机器学习对 IPL-T20 板球比赛进行综合分析和预测建模
Pub Date : 2024-02-15 DOI: 10.17485/ijst/v17i7.2944
Probodh Narayan Gour, Mohd. Faheem Khan
Objective : Current study intends to develop a predictive model for Indian Premier League (IPL) cricket match results using machine learning techniques. In order to provide a precise framework that allows for the prediction of IPL match outcomes, it aims to examine player statistics, match dynamics, and historical data. Method : SVM, Random Forest, Logistic Regression, Decision Tree, and KNN models were used in this study to predict player performance on any given day. Form, fitness, and previous results were among the historical player data that were used as characteristics. Each model preceded through training and testing phases, with accuracy, precision, and recall metrics evaluated to determine the most effective algorithm for forecasting player performance. Findings : Final studies indicated that relative team strength of competitor teams, recent form of players, and opponent pairings are distinguishing features for predicting the performance of both players and teams on any given day. The multi-machine learning approach-based model that was constructed demonstrated an accuracy of 0.71, further indicating improved performance for the given challenge. Modelling team strength is similar to modelling individual player batting and bowling performances, which is the cornerstone of our approach. Novelty : This paper was designed based on a novel approach leveraging combinatorial machine learning methods. This has been found to demonstrate unprecedented performance improvement in predicting a player’s performance on a given day. Additionally, the presented approach may prove valuable in opening new avenues to advance machine learning applications in sports analytics by addressing the limitations of existing methods. Keywords: Machine Learning, Sports analytics, SVM, Random Forest, KNN
目标:本研究旨在利用机器学习技术为印度板球超级联赛(IPL)的比赛结果开发一个预测模型。为了提供一个能够预测 IPL 比赛结果的精确框架,本研究旨在检查球员统计数据、比赛动态和历史数据。方法:本研究使用 SVM、随机森林、逻辑回归、决策树和 KNN 模型来预测球员在任何一天的表现。球员的状态、体能和之前的成绩都是作为特征的历史数据。每个模型都经过了训练和测试阶段,并对准确率、精确度和召回率进行了评估,以确定预测球员表现的最有效算法。研究结果 :最终研究表明,竞争对手球队的相对实力、球员近期状态和对手配对是预测球员和球队在任何一天表现的显著特征。所构建的基于多机学习方法的模型的准确率为 0.71,进一步表明特定挑战的成绩有所提高。团队实力建模与球员个人击球和保龄球表现建模类似,这也是我们方法的基础。新颖性:本文的设计基于一种利用组合机器学习方法的新颖方法。我们发现,这种方法在预测球员某一天的表现方面取得了前所未有的进步。此外,通过解决现有方法的局限性,本文提出的方法可能被证明在开辟新途径以推进体育分析中的机器学习应用方面具有重要价值。关键词机器学习 体育分析 SVM 随机森林 KNN
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引用次数: 0
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Indian Journal Of Science And Technology
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