Engineering Reports最新文献_第2页

New concepts in the design of an IoT electric torque wrench‐based on a smart meter chip 基于智能电表芯片的物联网电动扭矩扳手设计新理念

Engineering Reports Pub Date : 2024-06-13 DOI: 10.1002/eng2.12941

Zhaohui Meng, Peng Zhang, Hongli Zhang, Huawei Wang

引用次数: 0

Automatic plant disease detection using computationally efficient convolutional neural network 利用计算效率高的卷积神经网络自动检测植物病害

Engineering Reports Pub Date : 2024-06-13 DOI: 10.1002/eng2.12944

Muhammad Rizwan, Samina Bibi, S. Haq, Muhammad Asif, Tariqullah Jan, M. H. Zafar

{"title":"Automatic plant disease detection using computationally efficient convolutional neural network","authors":"Muhammad Rizwan, Samina Bibi, S. Haq, Muhammad Asif, Tariqullah Jan, M. H. Zafar","doi":"10.1002/eng2.12944","DOIUrl":"https://doi.org/10.1002/eng2.12944","url":null,"abstract":"Agricultural plants are the fundamental source of nutrients worldwide. The attack of diseases on these plants leads to food scarcity and results in a catastrophic situation. These diseases can be prevented by using manual or automatic approaches. The manual approach, where plant pathologists inspect fields, is costly, error‐prone, and time‐consuming. Alternatively, automatic approaches utilize 2D plant images processed through machine learning. The current study opts for the later approach due to its advantages in terms of speed, efficiency, and convenience. Convolutional neural network (CNN)‐based prominent models, such as MobileNet, ResNet50, Inception, and Xception, are preferred for automatic plant disease detection due to their high performance, but they demand substantial computational resources, limiting their use to a class of large‐scale farmers. The proposed study developed a novel CNN model that is suitable for small‐scale farmers. The numerical outcomes indicate that the proposed model surpassed the state‐of‐the‐art models by achieving an average accuracy of 96.86%. The proposed model utilized comparatively limited computational resources as analyzed through floating‐point operations (FLOPs), number of parameters, computation time, and model's size. Furthermore, a statistical approach was proposed to analyze a model while collectively accounting for its performance and computational complexity. It is observed from the results that the proposed model outperformed the state‐of‐the‐art techniques in terms of both average recognition accuracy and computational complexity.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141348006","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

Ultra‐broadband sound absorption characteristics in underwater ultra‐thin metamaterial with three layer bubbles 带三层气泡的水下超薄超材料的超宽带吸声特性

Engineering Reports Pub Date : 2024-06-12 DOI: 10.1002/eng2.12939

Nansha Gao, Qiaogao Huang, Guang-xu Pan

引用次数: 0

Textile‐based high‐gain bow‐tie antenna using metamaterials for medical applications 利用超材料的纺织品高增益弓形天线用于医疗应用

Engineering Reports Pub Date : 2024-06-12 DOI: 10.1002/eng2.12949

Farzad Khajeh‐Khalili, Parisa Shirvani, M. H. Neshati

{"title":"Textile‐based high‐gain bow‐tie antenna using metamaterials for medical applications","authors":"Farzad Khajeh‐Khalili, Parisa Shirvani, M. H. Neshati","doi":"10.1002/eng2.12949","DOIUrl":"https://doi.org/10.1002/eng2.12949","url":null,"abstract":"This paper presents a high‐gain wearable circularly polarized bow‐tie antenna (WCPBTA) with metamaterial unit‐cells and 5 pins (5Ps) technique for telemedicine applications such as telemonitoring the elderly or the patients especially for emergency conditions of contagious diseases. The frequency range of the proposed antenna is 5.725–5.850 GHz, which belongs to the unlicensed‐national information infrastructure (U‐NII‐3) for the industrial, scientific, and medical (ISM) sub‐channels. A light‐weight and flexible felt with dielectric constant εr = 3, thickness 1.27 mm, and tan (δ) = 0.0095 is used as the substrate for patient comfort and wearability. The overall dimensions of the proposed antenna are 64 × 62 × 1.27 mm3 or 0.102 λg3 at 5.8 GHz. The maximum simulated gain at 5.8 GHz is 8.25 dB, which is more than 4 dB compared to that of the original bow‐tie antenna. Besides, the axial ratio (AR) and the specific absorption rate (SAR) are also analyzed, which meet the perfect requirement for medical applications. The fabricated prototype of the antenna shows good compatibility between simulation and measurement results. These characteristics make the proposed WCPBTA a good choice for wireless body area networks (WBANs) in telemonitoring applications especially with the aim of preventing the spread of contagious diseases.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353868","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

Molecular dynamics simulation of argon isochoric transition to supercritical state 氩向超临界状态等时转变的分子动力学模拟

Engineering Reports Pub Date : 2024-06-04 DOI: 10.1002/eng2.12940

Yunmin Ran, V. Bertola

{"title":"Molecular dynamics simulation of argon isochoric transition to supercritical state","authors":"Yunmin Ran, V. Bertola","doi":"10.1002/eng2.12940","DOIUrl":"https://doi.org/10.1002/eng2.12940","url":null,"abstract":"The effect of the initial atoms distribution on the molecular dynamics (MD) simulation of a model atomic fluid (argon) is investigated for the case of the isochoric phase transition to the supercritical state. In particular, the case of uniformly distributed atoms in the simulation domain is compared with the case of separated liquid and vapor atoms. The sensitivity of simulations to asymmetric nanoscale perturbations in the boundary is also studied. Despite its high computational cost, the MD approach has the potential to successfully address long‐standing problems in computational fluid dynamics (CFD), especially those associated with mathematical singularities, such as contact angles, vortices, phase transitions and so forth. Unlike conventional CFD simulations, where the initial condition is the pressure or velocity distribution in the simulation domain, MD simulations also require the initial position of each molecule. Thus, it is important to understand whether a judicious choice of the initial distribution of molecules can reduce the overall computation time of the simulation. The evolution of the model fluid system during the phase transition was simulated using a Lennard‐Jones interatomic potential, corrected with the Lorentz–Berthelot mixing rule for the interactions with the solid walls. The system was allowed to relax until equilibrium, and then a Heaviside temperature step was applied to the wall to bring the system to supercritical conditions. Results show the initial choice of the atoms distribution can significantly affect the computational time, while the effect of asymmetric perturbations on the boundary is negligible.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266823","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

Numerical simulation of CO2 enhanced condensate gas recovery: A case study in pen 5 gas reservoir 二氧化碳提高凝析气采收率的数值模拟：第 5 笔气藏案例研究

Engineering Reports Pub Date : 2024-06-04 DOI: 10.1002/eng2.12920

Min Wu, Daoqing Li, Yi Zhang, Jinglei Zhao, Zehao Xie, Peng Qiu, Hasiyati Sayiti, Haoran Sun

{"title":"Numerical simulation of CO2 enhanced condensate gas recovery: A case study in pen 5 gas reservoir","authors":"Min Wu, Daoqing Li, Yi Zhang, Jinglei Zhao, Zehao Xie, Peng Qiu, Hasiyati Sayiti, Haoran Sun","doi":"10.1002/eng2.12920","DOIUrl":"https://doi.org/10.1002/eng2.12920","url":null,"abstract":"CO2 flooding is an effective technology for suppling condensate gas reservoir pressure and mitigating global warming. In this study, numerical simulation studies have been conducted to enhance gas recovery in Pen5 condensate gas reservoir using CO2 flooding. Pen5 reservoir has lasted 20 years of primary depletion, which affected by water invasion and retrograde condensation. In numerical simulation study, the GEM module is applied to implement history‐matching of production data, and good agreement has been achieved. Based on comprehensive geological understanding, production dynamics, and numerical simulation techniques, areas with minimal impact from water invasion and retrograde condensation contamination have been delineated. The comparison between continued depletion and the implementation of CO2 injection as a replacement technology in favorable areas has demonstrated the feasibility of CO2 flooding development in these regions. The analysis of the advantages and disadvantages of using miscible flooding and immiscible flooding was conducted, and the optimal development well pattern was evaluated. In the end, the plan of CO2 flooding of Pen5 reservoir has been designed and the gas production rate in the next 10 years has been predicted. The research findings of this study have reference significance for the practical application of CO2 flooding in developing condensate gas reservoirs.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141268274","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 clustering machine learning approach for improving concrete compressive strength prediction 改进混凝土抗压强度预测的聚类机器学习方法

Engineering Reports Pub Date : 2024-06-03 DOI: 10.1002/eng2.12934

Demetris Demetriou, T. Polydorou, Demetris Nicolaides, M. Petrou

引用次数: 0

Annual degradation rates and soiling losses of photovoltaic systems composed of recent crystalline silicon technologies in temperate climate 温带气候下采用最新晶体硅技术的光伏系统的年降解率和污染损失

Engineering Reports Pub Date : 2024-06-03 DOI: 10.1002/eng2.12937

Tetsuyuki Ishii

{"title":"Annual degradation rates and soiling losses of photovoltaic systems composed of recent crystalline silicon technologies in temperate climate","authors":"Tetsuyuki Ishii","doi":"10.1002/eng2.12937","DOIUrl":"https://doi.org/10.1002/eng2.12937","url":null,"abstract":"The purpose of this study is to investigate the annual degradation rates of photovoltaic (PV) systems composed of PV modules based on recent crystalline silicon (c‐Si) PV technologies. We investigated the annual degradation rates of four PV systems composed of different c‐Si PV technologies, comprising p‐type multi‐crystalline silicon with a passivated emitter rear cell, n‐type silicon heterojunction, p‐type single‐crystalline silicon (sc‐Si) with an aluminum back surface field, and n‐type (sc‐Si) solar cell technologies. These systems were located in Gunma Prefecture in Japan and were measured over 6 years. Furthermore, the effects of soiling on the annual degradation rates of these PV systems were examined by partially surface cleaning the PV arrays two times. The results obtained indicate that the apparent annual degradation rates of the PV strings before surface cleaning were 0.8, 1.6, 1.4, and 1.2%/year, respectively, because of optical losses due to dust particles. However, the inherent annual degradation rates of the PV strings after surface cleaning were 0.1, 0.6, 0.0, and 0.3%/year, respectively. These low degradation rates indicate that the PV systems composed of the recent c‐Si PV technologies all offered reasonably stable performance that was reduced by 3.6%, 5.5%, 7.3%, and 4.8%, respectively because of the effects of surface soiling, although the surfaces of the PV arrays had been washed by plentiful rainfall under their humid subtropical climatic operating conditions.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141269123","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

Facilitating aerospace engineering senior design: Integrating lab curriculum redesign with student project and new technologies 促进航空航天工程高级设计：将实验室课程重新设计与学生项目和新技术相结合

Engineering Reports Pub Date : 2024-06-02 DOI: 10.1002/eng2.12938

Mingtai Chen

引用次数: 0

A reliable non‐volatile in‐memory computing associative memory based on spintronic neurons and synapses 基于自旋电子神经元和突触的可靠非易失性内存计算关联存储器

Engineering Reports Pub Date : 2024-04-24 DOI: 10.1002/eng2.12902

Mahan Rezaei, Abdolah Amirany, M. H. Moaiyeri, Kian Jafari

{"title":"A reliable non‐volatile in‐memory computing associative memory based on spintronic neurons and synapses","authors":"Mahan Rezaei, Abdolah Amirany, M. H. Moaiyeri, Kian Jafari","doi":"10.1002/eng2.12902","DOIUrl":"https://doi.org/10.1002/eng2.12902","url":null,"abstract":"This article introduces an innovative non‐volatile associative memory (AM) that leverages spintronic synapses, employing magnetic tunnel junctions (MTJ) in conjunction with neurons constructed using carbon nanotube field‐effect transistors (CNTFETs). Our proposed design represents a significant advancement in area optimization and outperforms prior designs. We adopt MTJ‐based spintronic devices due to their remarkable attributes, including dependable reconfigurability and nonvolatility. Simultaneously, CNTFETs effectively address the longstanding limitations traditionally associated with MOSFETs. In this work, our proposed design undergoes rigorous simulations that account for process variations. The results demonstrate that our AM system closely approximates its ideal mathematical model, even with significant process variations. Furthermore, we investigate the impact of Tunnel Magnetoresistance (TMR) on the performance of our proposed AM system. Our investigations reveal that, even with a TMR as low as 100%, our design matches and often surpasses the performance of its counterparts operating with a TMR of 300%. This achievement holds profound significance from a fabrication standpoint, as fabricating MTJs with high TMR values can be intricate and costly. Overall, our novel AM system represents a significant breakthrough in emerging technologies, harnessing the unique strengths of spintronic synapses and advanced carbon nanotube transistors while robustly addressing challenges in performance and variability.","PeriodicalId":502604,"journal":{"name":"Engineering Reports","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661671","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