The Journal of Engineering最新文献

Regulation of mixed convective flow in a horizontal channel with multiple slots using P, PI, and PID controllers 使用 P、PI 和 PID 控制器调节多槽水平通道中的混合对流

The Journal of Engineering Pub Date : 2024-06-01 DOI: 10.1049/tje2.12401

Sonjoy Chandra Debnath, Shuvo Chowdhury, Md Asaduzzaman, Most. Naznin Nahar, Ankita Binte Sattar, Sumon Saha

{"title":"Regulation of mixed convective flow in a horizontal channel with multiple slots using P, PI, and PID controllers","authors":"Sonjoy Chandra Debnath, Shuvo Chowdhury, Md Asaduzzaman, Most. Naznin Nahar, Ankita Binte Sattar, Sumon Saha","doi":"10.1049/tje2.12401","DOIUrl":"https://doi.org/10.1049/tje2.12401","url":null,"abstract":"This study numerically investigates mixed convective cooling in a two‐dimensional horizontal channel containing periodically heated blocks by applying proportional (P), proportional‐integral (PI), and proportional‐integral‐derivative (PID) controllers. Three different controller configurations regulate the amount of cold air entering the chamber. The air's non‐dimensional temperature is continuously monitored at the set point to compare the controllers’ performance, and the percentage of overshoot and the steady‐state error are analysed. The investigated chamber comprises one inlet and two exit ports, a temperature sensor, and two heated blocks that are isotherm heat sources. The Galerkin finite element approach computationally solves the equations of continuity, momentum, and energy to analyse the thermo‐fluid phenomena occurring within the chamber. Parametric simulation is carried for different values of the proportional gain (Kp = 0.005, 0.010, 0.050 m s−1 K−1), the integral gain (Ki = 0.05, 0.10, 0.15 m s−2 K−1), the derivative gain (Kd = 10−5, 10−4, 10−3 m K−1) to achieve a consistent and expeditious response. Variations of Reynolds, Richardson, and mean Nusselt numbers with time are plotted to compare the system's performance. The investigation indicates that the PI controller produces a comparable level of performance with the PID controller, reducing the necessity to add a derivative controller.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141413329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An improved hybrid network‐on‐chip with flexible topology and frugal routing 具有灵活拓扑和节俭路由的改进型混合片上网络

The Journal of Engineering Pub Date : 2024-06-01 DOI: 10.1049/tje2.12395

Qaiser Ijaz, E. Bourennane

引用次数: 0

Magnetic sensors for contactless and non‐intrusive measurement of current in AC power systems 用于交流电力系统电流非接触式和非侵入式测量的磁传感器

The Journal of Engineering Pub Date : 2024-06-01 DOI: 10.1049/tje2.12371

Prasad Shrawane, Tarlochan Sidhu

{"title":"Magnetic sensors for contactless and non‐intrusive measurement of current in AC power systems","authors":"Prasad Shrawane, Tarlochan Sidhu","doi":"10.1049/tje2.12371","DOIUrl":"https://doi.org/10.1049/tje2.12371","url":null,"abstract":"This paper reports the results of an investigation into the use of magnetic sensors for measuring AC currents and subsequently, estimating AC current phasors in low‐ and medium voltage AC power systems. Tunnelling magnetoresistive (TMR) sensor of high sensitivity and a wide range was used for the magnetic field measurement around AC conductor. The sensor was calibrated to overcome the inequality in the sensed magnetic field due to various aspects such as the distance from the source, minute structural variations, the magnitude of the source current, and presence of harmonics. Performance was tested for accuracy at lower frequencies such as 1, 2, 5 and 10 Hz as well as at higher frequencies such as 2nd, 3rd, 4th and 5th harmonics of the fundamental frequency. The percentage total vector error (TVE) was calculated for current phasors with input current magnitudes varying from 5 to 1500 A of various frequencies and was compared with the actual current as well as with the outputs of a high accuracy conventional core‐wound donut type current transformer (CT). The measurement accuracy corresponding to magnitude, phase and TVE during laboratory and field applications validated the suitability of TMR sensor for contactless and non‐invasive AC current measurement.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141411154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel jittered‐carrier phase‐shifted sine pulse width modulation for cascaded H‐bridge converter 用于级联 H 桥转换器的新型抖动载波相移正弦脉宽调制器

The Journal of Engineering Pub Date : 2024-06-01 DOI: 10.1049/tje2.12391

Dan Luo, Dong Lin, Wenzhong Zhang, Wenwu Lian

引用次数: 0

BrutNet: A novel approach for violence detection and classification using DCNN with GRU BrutNet：使用带有 GRU 的 DCNN 进行暴力检测和分类的新方法

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12375

M. Haque, Hussain Nyeem, Syma Afsha

{"title":"BrutNet: A novel approach for violence detection and classification using DCNN with GRU","authors":"M. Haque, Hussain Nyeem, Syma Afsha","doi":"10.1049/tje2.12375","DOIUrl":"https://doi.org/10.1049/tje2.12375","url":null,"abstract":"Automatic Violence Detection and Classification (AVDC) with deep learning has garnered significant attention in computer vision research. This paper presents a novel approach for combining a custom Deep Convolutional Neural Network (DCNN) with a Gated Recurrent Unit (GRU) in developing a new AVDC model called BrutNet. Specifically, a time‐distributed DCNN (TD‐DCNN) is developed to generate a compact 2D representation with 512 spatial features per frame from a set of equally‐spaced frames of dimension 16090 in short video segments. Further to leverage the temporal information, a GRU layer is utilised, generating a condensed 1D vector that enables binary classification of violent or non‐violent content through multiple dense layers. Overfitting is addressed by incorporating dropout layers with a rate of 0.5, while the hidden and output layers employ rectified linear unit (ReLU) and sigmoid activations, respectively. The model is trained on the NVIDIA Tesla K80 GPU through Google Colab, demonstrating superior performance compared to existing models across various video datasets, including hockey fights, movie fights, AVD, and RWF‐2000. Notably, the model stands out by requiring only 3.416 million parameters and achieving impressive test accuracies of 97.62%, 100%, 97.22%, and 86.43% on the respective datasets. Thus, BrutNet exhibits the potential to emerge as a highly efficient and robust AVDC model in support of greater public safety, content moderation and censorship, computer‐aided investigations, and law enforcement.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140760730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Magnification factor for pile internal forces of pile‐supported wharves under bi‐directional ground motions 双向地面运动下桩支撑码头的桩内力放大系数

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12376

Yunfen Feng, Shufei Gao, Fanli Jing

引用次数: 0

VSG‐controlled parallel‐connected voltage‐source converters in low‐voltage microgrid with dominant resistive impedance 具有主导电阻阻抗的低压微电网中的 VSG 控制并联电压源转换器

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12379

Mohsen Rahimi

{"title":"VSG‐controlled parallel‐connected voltage‐source converters in low‐voltage microgrid with dominant resistive impedance","authors":"Mohsen Rahimi","doi":"10.1049/tje2.12379","DOIUrl":"https://doi.org/10.1049/tje2.12379","url":null,"abstract":"This paper deals with the control and performance improvement of parallel‐operated voltage‐source inverters (VSIs) controlled as virtual synchronous generators (VSGs). In publications regarding the parallel‐operated VSGs, transmission lines are considered to be mainly inductive. However, less analytical works have been done regarding the control of paralleled VSGs in low‐voltage grids with dominant resistive impedances. Once VSIs are controlled as VSGs in a microgrid with more resistive transmission lines, swing equation and system representation for the power‐angle synchronization will change leading to a new control structure. Therefore, this paper deals with the control of parallel‐operated converter‐based VSGs in low‐voltage grids with dominant resistive line impedances. In this way, the VSG representation, comprising the swing equation and V‐P droop characteristic, for applications in highly resistive microgrids is presented, in which the swing equation and VSG frequency are related to reactive power. Then, the V‐P droop characteristic is modified and an enhanced P‐V droop characteristic for proper sharing of active power between the VSGs in highly resistive microgrids is proposed. Next, the VSG control is modified so that the R/X ratio at the VSG output increases and thus the decoupled control of active/reactive powers in relatively inductive cases is realized as well.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140790931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The design approach of an artificial intelligent (AI) medical system based on electronical health records (EHR) and priority segmentations 基于电子健康记录（EHR）和优先细分的人工智能（AI）医疗系统的设计方法

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12381

Zarif Bin Akhtar

{"title":"The design approach of an artificial intelligent (AI) medical system based on electronical health records (EHR) and priority segmentations","authors":"Zarif Bin Akhtar","doi":"10.1049/tje2.12381","DOIUrl":"https://doi.org/10.1049/tje2.12381","url":null,"abstract":"In the rapidly evolving landscape of digital systems and modern technology, including computing and device peripherals, a paradigm shift is evident across various engineering fields. This transformation is characterized by the integration of cutting‐edge concepts such as Artificial Intelligence (AI), Machine Learning, Deep Learning, Cloud Computing, and Smart Digital Systems. Notably, these advancements hold significant promise in Biomedical Engineering, where they play crucial roles in comprehending human conditions and anatomy. Given the paramount importance of health, especially amidst rising diseases and health‐related challenges, there arises a pressing need for optimal solutions. This research focuses on the integration of Electronic Health Record (EHR) systems with AI to deliver efficient solutions. Specifically, the research targets issues related to prioritization and segment queue management, with the aim of enhancing overall proficiency and efficiency in healthcare operations. The research presents a prototype version developed, deployed, and experimentally evaluated to assess its performance in achieving the stated objectives. Through this investigation, the research seeks to contribute to the advancement of EHR systems and AI integration in healthcare, ultimately aiming to enhance patient care and healthcare delivery processes.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140785899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lumped‐element equivalent circuit modelling of district heating pipe in electromagnetic transients program 电磁瞬变程序中的区域供热管道块元等效电路建模

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12377

Mingyu Jiang, Yue Xia, Tian Lan, Ruikai Song, Songhuai Du, Juan Su

{"title":"Lumped‐element equivalent circuit modelling of district heating pipe in electromagnetic transients program","authors":"Mingyu Jiang, Yue Xia, Tian Lan, Ruikai Song, Songhuai Du, Juan Su","doi":"10.1049/tje2.12377","DOIUrl":"https://doi.org/10.1049/tje2.12377","url":null,"abstract":"Electromagnetic transients program (EMTP) is widely used to analyze transients in power systems. With the increased interest in integrated energy systems (IESs), it would be beneficial to extend the application of EMTP to multi‐physics transients in integrated electrical and heating networks. In this paper, an accurate and efficient lumped‐element circuit model of the heating district pipe is developed in EMTP. The pipe is split into segments using spatial discretization. The application of the numerical discretization to the energy conservation equation gives the discretized pipe equation which is expressed in the form of a companion model of EMTP. In order to reduce the computational effort, the time‐varying terms in the admittance matrix of the companion model of pipe are eliminated. The modification of the admittance matrix is avoided. Furthermore, the internal nodes resulting from spatial discretization are eliminated, resulting in a lumped‐element circuit model with only two external nodes. Case studies are carried out to validate the proposed model in terms of accuracy and efficiency. The 2‐norm error of the proposed model is 0.0153%. With a pipe length of 100 m, the computational speed of the proposed model is increased by a factor of 2.94 compared with the existing distributed‐element circuit model. The implementation of the proposed pipe model in the EMTP‐type simulator enables the analysis of multi‐physics transients in a multi‐carrier energy system.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140784404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct synthesis approach to design PDμ${text{PD}}^mu$ based smith predictor for integrating plants: Studied on a quadrotor UAV 用直接合成法设计基于 PDμ${text{PD}}^mu$ 的用于集成植物的史密斯预测器：在四旋翼无人机上的研究

The Journal of Engineering Pub Date : 2024-04-01 DOI: 10.1049/tje2.12378

A. Ranjan, Utkal Mehta, Surya Prakash, S. Azid

引用次数: 0