The Journal of Engineering最新文献_第7页

An improved uncertainty autoencoder with blurred measurements 一种改进的测量模糊不确定度自编码器

The Journal of Engineering Pub Date : 2023-09-01 DOI: 10.1049/tje2.12311

Ke Xu, Weiqiang Wu, Hongguang Xu

引用次数: 0

Few‐shot electrical equipment image recognition method based on an improved two‐stage fine‐tuning approach 基于改进的两级微调方法的少镜头电气设备图像识别方法

The Journal of Engineering Pub Date : 2023-09-01 DOI: 10.1049/tje2.12313

Junpeng Wu, Jiajun Zeng, Yibo Zhou, Ye Zhang, Yiwen Zhang

{"title":"Few‐shot electrical equipment image recognition method based on an improved two‐stage fine‐tuning approach","authors":"Junpeng Wu, Jiajun Zeng, Yibo Zhou, Ye Zhang, Yiwen Zhang","doi":"10.1049/tje2.12313","DOIUrl":"https://doi.org/10.1049/tje2.12313","url":null,"abstract":"Abstract In the process of electrical equipment detection based on deep learning, insufficient image samples of the target equipment will lead to detection failure. To solve this problem, an object detection network and two‐stage fine‐tuning approach based on You Only Look Once (YOLO)v4 is proposed in this paper to achieve image recognition of electrical equipment under the condition of small samples. Using the two‐stage and dual‐network method as the training strategy, the data‐rich base class samples are used to train the sample classifier based on the modified cosine similarity in the base class training stage, and the fine‐tuning is carried out in the small sample new class training stage. In the training part, the improved Retinanet network is used for coarse detection and the YOLOv4 network with Convolutional Block Attention Module (CBAM) attentional mechanism module is inserted for fine detection. The experimental results show that the average accuracy of the proposed method under the settings of 5‐shot, 10‐shot, and 30‐shot is 31.6%, 34.3%, and 52.8%, respectively, which greatly improves the ability of electrical equipment identification under the condition of few‐shot.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134961761","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

Prioritizing protection communication in a 5G slice: Evaluating HTB traffic shaping and UL bitrate adaptation for enhanced reliability 5G分片中保护通信的优先级:评估HTB流量整形和UL比特率自适应以增强可靠性

The Journal of Engineering Pub Date : 2023-09-01 DOI: 10.1049/tje2.12309

Petra Raussi, Heli Kokkoniemi‐Tarkkanen, Kimmo Ahola, Antti Heikkinen, Mikko Uitto

{"title":"Prioritizing protection communication in a 5G slice: Evaluating HTB traffic shaping and UL bitrate adaptation for enhanced reliability","authors":"Petra Raussi, Heli Kokkoniemi‐Tarkkanen, Kimmo Ahola, Antti Heikkinen, Mikko Uitto","doi":"10.1049/tje2.12309","DOIUrl":"https://doi.org/10.1049/tje2.12309","url":null,"abstract":"Abstract 5G network slicing is promising in prioritizing time‐critical protection communication in wireless networks of smart grids. However, network slicing offered by telecommunication providers encompasses all smart grid applications, lacking granularity. Smart grid automation standards provide recommendations on prioritization of protection communication to improve reliability but only for wired connections. Therefore, this paper investigates hierarchical token bucket (HTB) traffic shaping and uplink (UL) bitrate adaptation of a live video stream for prioritizing protection communication within a 5G slice. An experimental setup combines controller‐hardware‐in‐the‐loop (CHIL) with a quality of service (QoS) measurement system for validation. The system under test consists of commercial 5G networks, intelligent electronic devices (IEDs), and merging units for validation with three smart grid applications: fault location, line differential, and intertrip protection. HTB traffic shaping improves protected faults by 47.57% in congested and 1.16% in non‐congested scenarios. UL bitrate of the video stream adaptation by 2 Mbps increases protected faults by 3.69%. HTB traffic shaping even improves prioritization with a wired connection without introducing additional delays. HTB traffic shaping must be deployed in routers to maintain good QoS for critical applications. Collaboration between utilities and telecommunication providers is essential to effectively deploy 5G network slicing on smart grids.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135297926","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

Investigating the effects of uniaxial pressure on the preparation of MgTiO₃–CaTiO₃ ceramic capacitors for MRI systems 研究了单轴压力对磁共振成像系统用MgTiO3-CaTiO3陶瓷电容器制备的影响

The Journal of Engineering Pub Date : 2023-09-01 DOI: 10.1049/tje2.12300

Zaineb Jebri, Mahfoudh Taleb Ali, Isabelle Bord Majek

{"title":"Investigating the effects of uniaxial pressure on the preparation of MgTiO<sub>3</sub>–CaTiO<sub>3</sub> ceramic capacitors for MRI systems","authors":"Zaineb Jebri, Mahfoudh Taleb Ali, Isabelle Bord Majek","doi":"10.1049/tje2.12300","DOIUrl":"https://doi.org/10.1049/tje2.12300","url":null,"abstract":"Abstract Today's healthcare system relies on magnetic resonance imaging (MRI) for early diagnosis and treatment planning. For open MRI systems to achieve resolutions of about a hundred microns, a high voltage is required, as well as a specialized power supply. Negative–positive–zero (NP0) ceramic is selected for the fabrication of adjustable capacitors. Specifically, it stands for which is a classification based on the temperature coefficient of capacitance (TCC) of the ceramic material used in the capacitor. NP0 capacitors have a TCC of 0 ±30 ppm/°C, which means that their capacitance value does not change significantly with temperature and frequency. They are known for their stability and low losses, making them ideal for applications that require high accuracy and reliability, such as timing circuits for radio frequency (RF) applications. Here, MgTiO 3 –CaTiO 3 ceramic is used to make an adjustable capacitor with desired properties for MRI systems. To enhance the dielectric properties of MgTiO 3 ceramics, CaTiO 3 was added in varying concentrations. After pressing and sintering, the resulting samples were tested using a vector network analyzer in the frequency range of 10–130 MHz. The adjustable capacitor fabricated using high co‐fired NP0 ceramic may have been used for MRI applications such as tuning circuits and matching networks, where precise capacitance values and low loss are critical. MRI systems with resonance frequencies of 128 MHz require trimmers with ceramic cores ( V Breakdown = 3 kV @ 128 MHz, C min = 3 pF, C Max = 30 pF, and C variation step = 1.5 pF).","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135388350","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

Coordinated optimization model for solar PV systems integrated into DC distribution networks 太阳能光伏系统与直流配电网的协调优化模型

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12295

Eleonora Achiluzzi, B. Venkatesh

{"title":"Coordinated optimization model for solar PV systems integrated into DC distribution networks","authors":"Eleonora Achiluzzi, B. Venkatesh","doi":"10.1049/tje2.12295","DOIUrl":"https://doi.org/10.1049/tje2.12295","url":null,"abstract":"Solar photovoltaic (PV) systems will drive deep electrification of energy systems leading to clean energy 2050. However, connecting large amounts of solar PV systems on direct current (DC) networks, like solar farms and potential future DC distribution systems, would lead to over voltages and loss of solar PV power output due to voltage issues. Further, current PV integration within distribution networks operate exclusively to maximize output using maximum power point tracking algorithms, without network coordination, which may lead to reduced solar output due to voltage issues. Here, a coordinated optimization model for solar PV systems and distribution network voltage regulators is presented. The proposed model optimally controls the settings of voltage controllers (DC‐DC converters), placed at the outputs of solar PV units and selected distribution lines, while maximizing solar power output and minimizing substation power (i.e. system losses). The solar PV systems are modelled using a trained neural network. Testing various systems against uncoordinated situations revealed that the proposed model yielded an increase in solar power of up to 60.06%, in the 28‐bus case. The proposed method will be an excellent tool enabling deep electrification using solar PV system and it overcomes limitations of uncoordinated systems used in practice today.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"225 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87012747","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

Design and construction of ferrite waveguide circulator with short wall in S band S波段短壁铁氧体波导环行器的设计与构造

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12291

H. D. Oskouei, Morteza Khoshcheshm, M. M. Shirkolaei, Alireza Mirtaheri

{"title":"Design and construction of ferrite waveguide circulator with short wall in S band","authors":"H. D. Oskouei, Morteza Khoshcheshm, M. M. Shirkolaei, Alireza Mirtaheri","doi":"10.1049/tje2.12291","DOIUrl":"https://doi.org/10.1049/tje2.12291","url":null,"abstract":"One of the most important components in the radar and microwave industry that provides transmitting and receiving features for an antenna at the same time is called a circulator. Ferrite circulators are passive three‐port devices in which the RF or microwave signal is transmitted from one port to other port without leakage to the third port. One of the main disadvantages of these waveguide elements is their large dimensions and especially their height, which cannot be used in some systems due to the limited workspace. This paper solves this problem by exploiting an incomplete wall waveguide to reduce the height of the circulator by 50%. These changes always reduce the frequency bandwidth of the element, the proposed technique optimizes the dimensions of the ferrite and its magnetic characteristics and increases the bandwidth to 400 MHz in 2.9 GHz, which is the ideal bandwidth required by many radar systems that have been reached. The ferrite circulator designed and built in this article has a port with a width of 72.13 mm and a height of 17 mm in the S‐band. The method results in a low insertion loss which is less than 0.5 decibels and a high isolation which created more than 20 decibels. The designed and optimized elements have been implemented and the test results verify the theoretical results.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90963613","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

Spatial variation of moisture content along the axial distance of corn at different superheated steam drying temperatures and various instantaneous times 不同过热蒸汽干燥温度和不同瞬时时间下玉米含水率沿轴向距离的空间变化

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12297

C. Keter, Mercy Jepchirchir Kimwa

{"title":"Spatial variation of moisture content along the axial distance of corn at different superheated steam drying temperatures and various instantaneous times","authors":"C. Keter, Mercy Jepchirchir Kimwa","doi":"10.1049/tje2.12297","DOIUrl":"https://doi.org/10.1049/tje2.12297","url":null,"abstract":"Superheated steam acts as both a heat source and a drying medium. The study sought to predict the evolution of the moisture transport behaviour of the corn kernel at various axial distances at varying instantaneous time. The equations describing the drying phases were solved using numerical solutions with the Eulerian technique in ANSYS software. Cone geometry was used to simulate the corn kernel with initial moisture content at 20% w.b. Steam conditions were similar to what is encountered in industry, with temperatures ranging (from 120–200°C) at 1.5 m s−1 velocity. ANOVA was used to determine if there was difference between the conditions. The temporal change in moisture from the apex to the periphery varied at superheated steam temperatures 120, 160 and 200°C. At 10, 100 and 200 s the drying rate and effective moisture diffusivity of corn kernel from the centre towards the periphery differed. Post‐hoc analysis with Bonferroni adjustment revealed that moisture content (w.b.%) differed between 10 and 100 s, 10 and 200 s and 100 and 200 s. The mean difference was attributed to the drying being in the falling drying phase at 200 s and initial condensation at 10 s. Thus, at high superheated steam temperatures, dry zones can be seen as the axial distance from the apex increases toward the periphery.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85168111","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

Research on spot market price forecasting method considering the electricity‐purchase gain for demand side 考虑需求侧购电收益的现货市场价格预测方法研究

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12298

Wang Ning, Du Yuan, Haohao Wang, Zhu Tao, Mingxing Wu, Yang Saite

引用次数: 0

HLS‐based swarm intelligence driven optimized hardware IP core for linear regression‐based machine learning 基于HLS的群体智能驱动的优化硬件IP核，用于基于线性回归的机器学习

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12299

A. Sengupta, Rahul Chaurasia, Mahendra Rathor

引用次数: 0

A method to detect internal leakage of hydraulic cylinder by combining data augmentation and multiscale residual CNN 一种结合数据增强和多尺度残差CNN的液压缸内泄漏检测方法

The Journal of Engineering Pub Date : 2023-08-01 DOI: 10.1049/tje2.12301

Qingchuan He, Huiqi Ruan, Jun Pan, Xiaotian Lyu

{"title":"A method to detect internal leakage of hydraulic cylinder by combining data augmentation and multiscale residual CNN","authors":"Qingchuan He, Huiqi Ruan, Jun Pan, Xiaotian Lyu","doi":"10.1049/tje2.12301","DOIUrl":"https://doi.org/10.1049/tje2.12301","url":null,"abstract":"Developing a method to detect internal leakage in hydraulic cylinder, which is used for Electro‐Hydrostatic Actuators (EHA), is important to prevent serious malfunctions for aircrafts. At present, the internal leakage in an EHA cannot be accurately detected only using operational data. This paper proposed a convolutional neural networks (CNN) based method to detect internal leakage in hydraulic cylinder according to the relationship between operational state parameters of EHA and leakage in the hydraulic cylinder. A method was presented to align multi‐source signals with different forms by using the motor current as a benchmark. Because the number of monitoring signals are relatively small, a feedforward neural network (FFNN) based data augment method is proposed to increase parameters of input data set. A general method on how to detect internal leakage by combining signals alignment, data augmentation and multiscale residual CNN was proposed. The experimental results show that the proposed method can be used to accurately detect internal leakage in a hydraulic cylinder operating under non‐stationary load and velocity conditions, and the detection accuracy reached 99.8%.","PeriodicalId":22858,"journal":{"name":"The Journal of Engineering","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89021423","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