Engineering Research Express最新文献_第8页

Strategic DG placement and sizing in developing nations' power systems using ISNT and modified forward-backward sweep 利用 ISNT 和修改后的前向后扫频技术，确定发展中国家电力系统中 DG 的战略布局和规模

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6fef

Tobiloba Somefun, Ademola Abdulkareem, Olawale Popoola, Comfort Somefun, Titus Ajewole

{"title":"Strategic DG placement and sizing in developing nations' power systems using ISNT and modified forward-backward sweep","authors":"Tobiloba Somefun, Ademola Abdulkareem, Olawale Popoola, Comfort Somefun, Titus Ajewole","doi":"10.1088/2631-8695/ad6fef","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6fef","url":null,"abstract":"The power sector in many developing nations faces challenges in meeting consumers’ demands for a reliable electricity supply due to increased load demand, primarily driven by population growth. Urban areas receive 24 h power, while extensive losses within the system limit coverage. Setting up centralised stations offers a temporary solution, but the capacity of the ageing transmission lines is uncertain. This study proposes integrating distributed generators (DG) into the power system, using Inherent Structural Network Topology (ISNT) for DG siting and a modified Forward-Backward Sweep model for sizing. Voltage Stability Index (VPI) assesses network stability. The model considers voltage profile and line losses, optimizing DG sites and sizes. Results demonstrate the model’s efficacy, offering insights for optimal DG planning to minimize losses and enhance voltage profiles. The study informs power system engineers for future planning, aiding decisions on DG location and size, potentially reducing line losses and improving voltage profiles, thus assisting in network upgrades or expansions.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"19 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189433","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

Performance of composite steel-concrete beam with stiffener next to web opening 腹板开孔旁有加劲件的钢-混凝土组合梁的性能

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6e56

Sheik Mastan, Anandh S, Sindhu Nachiar S

{"title":"Performance of composite steel-concrete beam with stiffener next to web opening","authors":"Sheik Mastan, Anandh S, Sindhu Nachiar S","doi":"10.1088/2631-8695/ad6e56","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6e56","url":null,"abstract":"Openings are provided in Composite steel-concrete beams (CB) for the allowance of ducts and pipes, which generally reduces the beam’s flexural performance. So, to retain the strength of these beams, stiffeners are introduced adjacent to the web openings. Hence, a numerical study is performed to evaluate the influence of the stiffeners next to web openings through finite element analysis (FEA) software ABAQUS v6.14. Three different shapes of openings with three different placements of stiffeners are considered for the study, namely circular, rectangular, and triangular openings with stiffeners along longitudinal, transverse, and diagonal directions. As revealed from the findings of FEA, comparisons are made based on the ultimate load, stiffness, and stress distribution. From comparisons, it is found that double-sided longitudinal and transverse stiffeners next to the circle opening are comparable to conventional CB. Similarly, Diagonal stiffeners increase strength in rectangular and triangle openings. Transverse stiffeners failed to increase load capacity and decrease stress concentration compared to other longitudinal and diagonal stiffeners. Further validation for the finite element results is done using the Levenberg–Marquardt (LM) algorithm, using the backpropagation variant technique of Artificial Neural Network (ANN). The results of ANN, i.e., Mean Square Error (MSE) and Multiple Determination Coefficient (R2), are above 0.9 and below 1, respectively. Thus, the results of ANN indicate that the provided results are perfectly fit for predicting with the ANN technique.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"14 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189431","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

Waveform optimization for future wireless communication: numerical simulation under mobile and vehicular scenarios in 5G and beyond 未来无线通信的波形优化：5G 及以后移动和车载场景下的数值模拟

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6bef

Tarun Mishra, Vivek Upadhyaya, Garima Mathur

{"title":"Waveform optimization for future wireless communication: numerical simulation under mobile and vehicular scenarios in 5G and beyond","authors":"Tarun Mishra, Vivek Upadhyaya, Garima Mathur","doi":"10.1088/2631-8695/ad6bef","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6bef","url":null,"abstract":"Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing (OFDM) are multicarrier regulating systems developed for quick communication. OFDM and its improved multi-carrier regulation technique employ equally distributed orthogonal sub-carriers for the transmission of data. These sub-carriers are modified using a conventional tweak plot, maintaining full information rates comparable to single carrier regulation schemes. The research also compares the two 5G modulation techniques, FBMC and UFMC, to OFDM, the 4G communication modulation technology. To evaluate the benefits of each contender, we compare important characteristics of different modulation approaches. The research compares the 5G modulation techniques FBMC and UFMC to OFDM, focusing on factors like power spectrum density, spectral efficiency, Bit Error rate, and Peak to Average Power Radio. To boost channel capacity and decrease interferences, the approach merges three alternative 5G waveforms under the LTE-V paradigm which is a specialized mode or configuration of Long Term Evolution (LTE) technology designed specifically for vehicular communication. MATLAB simulations show that FBMC performs better in terms of BER and capacity. In scenarios characterized by high interference due to power domain multiplexing and vehicular environment, FBMC demonstrates a maximum capacity that is 3.5 times greater than OFDM. However, in low-interference conditions, FBMC’s capacity exceeds UFMC’s by only a marginal 5%.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"11 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189432","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

Compact narrow slot antenna with stable radiation pattern and wide bandwidth 具有稳定辐射模式和宽带宽的紧凑型窄缝天线

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6fec

Balu Ashvanth

{"title":"Compact narrow slot antenna with stable radiation pattern and wide bandwidth","authors":"Balu Ashvanth","doi":"10.1088/2631-8695/ad6fec","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6fec","url":null,"abstract":"One of the most crucial parameters for any antenna is bandwidth. Over the whole extended bandwidth, the antenna achieves a high gain of 5dBi and a steady bidirectional radiation pattern. A novel design concept for increasing bandwidth and maintaining a consistent radiation pattern has been proposed for the radiated fields of a slot antenna. First, the radiated fields of the standard slot antenna are examined theoretically using characteristic modes (CMs). Its three CMs vibrate at 2.45, 4.78, and 7.17 GHz, respectively, according to the results. CM1 and CM3 both continue to emit radiation in both directions, but CM2 generates a radiation null in the broadside direction. After that, the linear slot is appropriately folded to change CM2’s non-bidirectional pattern into a bidirectional one, allowing for the broad bandwidth use of the neighbouring CM1 and CM2. The narrow slot is then used to create the stepped scheme, which reallocates these dual modes in close proximity to one another. By using these designs, the antenna’s radiation pattern consistency and small size of 0.022<italic toggle=\"yes\">λ</italic>o can be preserved, but its impedance bandwidth can be significantly expanded. After that, the proposed antenna is constructed and assessed. Measurements show that the antenna has a broad bandwidth (|S11|<−10 dB) of around 35.14%, covering the frequency range of 3.3 to 4.6 GHz.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"11 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189449","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

Performance assessment of earth-abundant kesterite-based CZTSSe solar cell using graphene oxide as HTL and zinc oxysulfide as ETL 以氧化石墨烯为 HTL、氧化锌为 ETL 的富土钾长石基 CZTSSe 太阳能电池性能评估

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6f6d

Shweta Yadav, R K Chauhan, Rajan Mishra

{"title":"Performance assessment of earth-abundant kesterite-based CZTSSe solar cell using graphene oxide as HTL and zinc oxysulfide as ETL","authors":"Shweta Yadav, R K Chauhan, Rajan Mishra","doi":"10.1088/2631-8695/ad6f6d","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6f6d","url":null,"abstract":"This research investigates the optimization of CZTSSe (copper zinc tin sulfide selenide) solar cells through the integration of graphene oxide (GO) in the role of HTL (hole transport layer) also zinc oxysulfide (Zn(O,S)) in the role of ETL (electron transport layer), replacing the conventional cadmium sulfide (CdS) buffer layer. CZTSSe, characterized by an impactful direct energy bandgap (1–1.5 eV) also a high absorption coefficient (>104 cm−1), exhibits prospects for efficient light absorption in the visible range. The study employs simulation characterization to comprehensively analyze the impact of the GO hole transparent layer and Zn (O,S) buffer layer on the optical and electrical attributes of the CZTSSe photovoltaic(PV) cell. Key parameters, such as power conversion efficiency (PCE), short-circuit current (JSC), fill factor (FF), and open-circuit voltage (VOC), are meticulously examined to substantiate the performance of the devices. These parameters include the energy bandgap, variations in thickness, doping concentration, defect density, parasitic resistance, temperature, and generation and recombination processes. The objective is to understand how these factors influence solar cell performances and to enhance light absorption, elevate charge mobility, and minimize carrier recombination losses. The culmination of these efforts results in the CZTSSe solar module achieving its maximum PCE of 28.23% when incorporating a Zn(O,S) ETL along with a GO hole transport layer and ZnO:Al as a window layer.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"23 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189437","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

Single gate heterostructure dopingless TFET: a comprehensive sensitivity investigation with exposure to various chemical analytes 单栅异质结构无掺杂 TFET：暴露于各种化学分析物的综合灵敏度调查

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6fee

Shwetapadma Panda, Sidhartha Dash

{"title":"Single gate heterostructure dopingless TFET: a comprehensive sensitivity investigation with exposure to various chemical analytes","authors":"Shwetapadma Panda, Sidhartha Dash","doi":"10.1088/2631-8695/ad6fee","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6fee","url":null,"abstract":"This study proposes a new chemical sensor designed using a single gate heterostructure dopingless tunnel field effect transistor (SG-HS-DLT). Combining Si0.6Ge0.4 in the source and HfO2 as the gate dielectric improves the sensor’s drain current sensitivity. Many chemical analytes, including hexane (C6H14), methanol (CH3OH), isopropanol (Iso-C3H7OH), dichloromethane (CH2Cl2), and chloroform (CHCl3) have been considered during the investigation. The conducting polymer is used as the gate metal due to its compatibility with the electronic chemical sensor. Modifying the gate work function with exposure to chemical substances is employed to determine the sensitivity of the reported chemical sensor. The electrical performance of the sensor is examined using transfer characteristics, switching ratio, average SS, BTBT rate, threshold voltage, electron concentration, energy band, and potential. Correspondingly, the sensitivity investigation comprises drain current sensitivity (SDrain), current ratio sensitivity (SR), average SS sensitivity (SAvgSS), and threshold voltage sensitivity (SVT). Further, the sensitivity analysis is extended for various temperatures and mole fractions (x). The SG-HS-DLT chemical sensor displays a higher value of SDrain of 3.64 × 105, SAvg.SS of 0.69444 for CHCl3 at room temperature. This article extensively uses the Silvaco TCAD simulation software to investigate the proposed chemical sensor.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"15 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189467","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

Optimization of EDM input variables for machining of novel Al7010/B4C/BN hybrid metal matrix nanocomposite using multi objective grey relational analysis 利用多目标灰色关系分析优化加工新型 Al7010/B4C/BN 混合金属基纳米复合材料的电火花加工输入变量

IF 1.7

Engineering Research Express Pub Date : 2024-08-28 DOI: 10.1088/2631-8695/ad6ff0

Gopichand Dirisenapu, Laxmanaraju Salavaravu, Rajyalakshmi Bandi

{"title":"Optimization of EDM input variables for machining of novel Al7010/B4C/BN hybrid metal matrix nanocomposite using multi objective grey relational analysis","authors":"Gopichand Dirisenapu, Laxmanaraju Salavaravu, Rajyalakshmi Bandi","doi":"10.1088/2631-8695/ad6ff0","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6ff0","url":null,"abstract":"In this research, the examination on the influence of EDM pulse variables during machining of Al7010/B4C/BN hybrid metal matrix nanocomposites (HMMNCs) manufactured by using ultrasonic assisted stir casting (UASC) route. The optimum input factors of die sinking EDM like pulse on time (Pon), discharge current (DC), gap voltage (GV) and pulse off time (Poff) on performance factors like tool wear rate (TWR), material removal rate (MRR), and surface roughness (SR) were studied. The Taguchi experimental design of L16 orthogonal array (OA) was selected for conducting experiments. The ANOVA route was utilized to obtain the % contribution of pulse parameters on response factors. The multi objective Grey relational analysis (GRA) was used for determining optimum machining condition. The results indicated that discharge current was more effects on output factors like SR, TWR and MRR followed by other parameters and that DC is the best substantial factor for multiple objective responses. The results exposed that the optimum EDM process factors condition is A1B1C1D3. The outcomes were further calculated by employing confirmatory experiment. Scanning electron microscope (SEM) was conducted to observe the surface properties of a specimen that underwent EDM. In the EDMed surface a complex combination surrounded by tiny and big melt droplets, various-sized fissures, microcracks, and void markings were presented. Moreover, observed the effects on the surface, such as the formation of a recast layer.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142189451","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

Fatigue damage accumulation in a bolted joint subjected to the random loading 承受随机载荷的螺栓连接中的疲劳损伤积累

IF 1.7

Engineering Research Express Pub Date : 2024-08-27 DOI: 10.1088/2631-8695/ad68c6

Bahram Haghighatnezhad, Ghazal Rajabikhorasani, Hassan Shirzadi Jahromi

引用次数: 0

Influence of the current density on the properties of electrodeposited Ni-W- Ti2AlC composite coatings 电流密度对电沉积 Ni-W- Ti2AlC 复合涂层性能的影响

IF 1.7

Engineering Research Express Pub Date : 2024-08-11 DOI: 10.1088/2631-8695/ad6a01

Lingling Liu, Mengyan Gao, Zixin Huang, Jiuhang Bai, Xiang Wang, Xiaoxian Li and Xuehui Zhang

{"title":"Influence of the current density on the properties of electrodeposited Ni-W- Ti2AlC composite coatings","authors":"Lingling Liu, Mengyan Gao, Zixin Huang, Jiuhang Bai, Xiang Wang, Xiaoxian Li and Xuehui Zhang","doi":"10.1088/2631-8695/ad6a01","DOIUrl":"https://doi.org/10.1088/2631-8695/ad6a01","url":null,"abstract":"In this work, Ni-W-Ti2AlC composite coatings with anti-wear and anti-corrosion abilities were prepared using direct current electrodeposition. The study primarily focuses on the influence of different current densities on the structure and properties of Ni-W-Ti2AlC composite coatings. The microstructural, mechanical properties, and electrochemical performances were studied by using SEM, XRD, EDS, and Tafel polarization techniques. The results indicated that Ti2AlC is successfully co-deposited into the Ni-W coating, and the average grain size of the Ni-W-Ti2AlC composite coating is 15.2 nm. The significant improvement in hardness, wear resistance, and corrosion resistance of Ni-W-Ti2AlC composite coating is attributed to the effects of solid solution strengthening and the uniform distribution of the microstructure. The suitable current density has a great influence on the properties. The microhardness of Ni-W-Ti2AlC composite coatings was increased by 99.59% at a current density of 5 A dm−2 compared to 3 A dm−2. At the same time, the friction coefficient decreased by 13.89%.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"38 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141935257","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

Effect of hybrid conductive fillers coating on woven jute fiber and its characterization 混合导电填料涂层对编织黄麻纤维的影响及其表征

IF 1.7

Engineering Research Express Pub Date : 2024-08-07 DOI: 10.1088/2631-8695/ad68ca

Prabu Krishnasamy, Mylsamy Goudilyan, Kannan C, Rajamurugan G, Arshath Ahamed M, Rohith Krishna and R Vishwas

{"title":"Effect of hybrid conductive fillers coating on woven jute fiber and its characterization","authors":"Prabu Krishnasamy, Mylsamy Goudilyan, Kannan C, Rajamurugan G, Arshath Ahamed M, Rohith Krishna and R Vishwas","doi":"10.1088/2631-8695/ad68ca","DOIUrl":"https://doi.org/10.1088/2631-8695/ad68ca","url":null,"abstract":"Despite the recent developments in fiber coating technology during the last decade, the coating of natural fibers still poses challenges. The present work aims to develop a novel electrically conductive jute fiber (JF) through electroless nickel-phosphorus (Ni-P) composite coating with hybrid reinforcements (graphene nanoplatelets (GNPs) and carbon black (CB)). Four different jute fiber-coated samples are prepared and identified as Ni-P/JF, Ni-P/GNPs/JF, Ni-P/CB/JF, and Ni-P/GNPs/CB/JF. The effect of hybrid reinforcements is studied through field-emission scanning electron microscopy (FESEM), energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction (XRD) and four-probe test to identify the morphological changes, elemental compositions, functional groups, phase structure and the electrical conductivity. A significant change was observed in the microstructure, diffraction peaks, and electrical conductivity of coated jute fiber with reinforcements. The best electrical conductivity of 13.141 S cm−1 is exhibited by Ni-P/GNPs/JF, while the minimum is registered with the Ni-P/CB/JF sample (9.597 S cm−1). The electrical conductivity of Ni-P composite coating with hybrid reinforcements (Ni-P/GNPs/CB/JF) is shown to be 17% higher and 19% lower than Ni-P/GNPs/JF and Ni-P/CB/JF samples, respectively.","PeriodicalId":11753,"journal":{"name":"Engineering Research Express","volume":"24 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141935297","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