Journal of Microwave Power and Electromagnetic Energy最新文献

{"title":"Feasibility study of patch antenna for monitoring moisture content of made tea","authors":"V. D. Shivling, Amandeep Singh, Baban K. S. Bansod, Urvashi Nag, D. Meena","doi":"10.1080/08327823.2022.2107572","DOIUrl":"https://doi.org/10.1080/08327823.2022.2107572","url":null,"abstract":"Abstract This study aims to analyze the patch antenna for moisture content measurement of made tea. The patch antenna-based system uses an air gap between the ground plane and an electrically conductive patch. The tea sample is contained in the air gap. The patch antenna design has a resonance frequency of 5 GHz. The resonance frequency and S11 parameters are measured for tea samples in the moisture range of 2–10%. The resonance frequency of the patch antenna was observed to decrease with an increase in the moisture content of tea. However, the return loss of patch antenna was observed to increase with an increase in the moisture content of made tea. Linear model parameters were calculated for the prediction of the moisture content of tea leaves.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90202625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dielectric behavior of soil as a function of frequency, temperature, moisture content and soil texture: a deep neural networks based regression model","authors":"Prachi Palta, Prabhdeep Kaur, K. S. Mann","doi":"10.1080/08327823.2022.2103630","DOIUrl":"https://doi.org/10.1080/08327823.2022.2103630","url":null,"abstract":"Abstract Dielectric behavior of soil has utmost applications in microwave remote sensing and soil treatment. In the present study, the soil's dielectric properties (Ɛ' and Ɛ\") were measured using the vector network analyzer and an open-ended coaxial probe (85070E, Agilent Technologies) in the region of 0.2 to 14 GHz. The observed results showed that Ɛ' and Ɛ\" strongly depend on frequency, texture, moisture content and temperature. A deep neural network (DNN) based multivariable regression model has been developed to model their behavior, using experimentally observed data to learn its parameters automatically. It shows a five-fold cross-validation root mean square errors (RMSE) of 0.0258 and 0.0336, and R2-scores of 1.0000 and 0.9998, between actual recorded and predicted values of Ɛ' and Ɛ\", respectively. The results of the proposed DNN-based model have been compared with the response surface method (RSM) based model; among these, the DNN-based model shows significantly better results. Further, the DNN-based estimates of Ɛ' and Ɛ\" for loam texture at a moisture content of 18% (i.e. in between observed experiments of 15% and 20%) are made and plotted with actual observed values at 15% and 20% to verify the predictive ability of the proposed DNN-based model. It shows an acceptable estimate of dielectric properties and the effectiveness of the fast and innovative DNN-based approach for predicting soil's dielectric properties depending upon multiple factors.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75022366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Self-sensing reinforced concrete for damage assessment and real time strength development in smart structures","authors":"M. Ozturk","doi":"10.1080/08327823.2022.2103628","DOIUrl":"https://doi.org/10.1080/08327823.2022.2103628","url":null,"abstract":"Abstract In this study, a self-sensing smart structure was developed with a novel approach. Electromagnetic wave based self-sensing structure designed by sending waves to the reinforced concrete structure through the reinforcement by using a coaxial cable. EM measurements were based on estimating the reflected EM waves through the reinforced concrete. Correlations between reflected EM wave, damage in reinforced concrete and strength development in concrete was estimated. According to test results, it was seen that with increasing crack width of reinforced concrete by applying monotonic load, reflection of EM wave through the reinforced concrete decreased. It was also seen that with strength development of the concrete, reflection of EM through the reinforced concrete increased. In the light of the findings of this study it can be said that, damage assessment and monitoring strength development of the reinforced concrete is possible in real time with applying the proposed novel technique.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78610515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Editor's message: highlighting the importance of transcendent conferences","authors":"J. Aguilar-Garib","doi":"10.1080/08327823.2022.2106070","DOIUrl":"https://doi.org/10.1080/08327823.2022.2106070","url":null,"abstract":"","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72523703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the effect of immersion fluids on the radiofrequency heating performance of cornflour","authors":"Qianyi Chen, Damla Dag, F. Kong, Ran Yang, Jiajia Chen","doi":"10.1080/08327823.2022.2066771","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066771","url":null,"abstract":"Abstract Non-uniform heating is a significant challenge in radiofrequency (RF) heating of low moisture foods. Previous experiments showed that the immersion of fluids (air, deionized water, and soybean oil) changed the RF heating uniformity and rate of cornflour. However, the behind mechanism is not well understood. This study developed a finite-element-based model that incorporated quasi-static electromagnetics and Fourier’s heat transfer to understand the effect of the three immersion fluids on the RF heating performance of cornflour. The model was validated and showed good agreement with experimental thermal images. The simulation results showed that the immersion of soybean oil increased the average heating rate and improved the heating uniformity compared to immersions of air and deionized water. Less distortion of electric potential reduced the fringe effect of edge heating and thus improved the heating uniformity. The higher heating rate was attributed to more dissipated power within the cornflour sample and less surface heat loss from cornflour to the surrounding fluid than the immersion of air or water. The use of soybean oil as immersion fluid could be a promising strategy to be implemented with RF technology to improve heating performance of low moisture food products.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85639029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Different heat treatments and sealing effect on the nutritive value of Lucerne hay","authors":"M. R. I. Shishir, K. Plessis-Fraissard, G. Brodie, B. Cullen, L. Cheng","doi":"10.1080/08327823.2022.2066773","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066773","url":null,"abstract":"Abstract This study investigated the comparative effects of conventional hot-air oven heating (CHO), microwave heating (MW) and sealing effect on the nutritive value of lucerne hay. Equivalent energy (125 J.g−1) was applied with a 1.1 kW of MW oven for 60 seconds (s) or a 3.06 kW CHO oven for 350 s. The required equivalent energy level was measured based on a preliminary calibration trial. Two heating method (CHO and MW) and sealing condition (SC) applied as treatment factors in this study. A two-way analysis of variance (P < 0.05) was used to measure the effect of different factors on some properties of lucerne hay. The dry matter (DM) percentage of lucerne hay was increased when MW treatments were applied on both sealed and non-sealed lucerne hay compared with the control. Both heating method and their interaction with SC had negative effects on crude protein (CP) percentage. DM digestibility (DMD) and Digestible organic matter in the DM (DOMD) were decreased by 9% and 5%, respectively, in the sealed MW group, compared with the sealed control. Neutral detergent fibre % also increased by 6% in the sealed MW group, compared with the sealed control group. However, no differences in acid detergent fibre % due to any heating method and/or SC were observed in this study. The mechanisms behind these changes require further exploration.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72373814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of the effect of changing the spatial distance with exposure time to mobile phones radiation on the structure and function of the testis in NMRI mice","authors":"Homa Soleimani, Mahbobeh Gafori Ghadarijani, F. Rafiei, P. Bayat","doi":"10.1080/08327823.2022.2066769","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066769","url":null,"abstract":"Abstract The present study was conducted to compare the effect of changing the spatial distance and time radio frequency (RF) radiation from mobile phone in standby mode on the structure and function of testicles. NMRI mice were randomly divided into three groups. The first group was the control and the second group (exposed group) was divided into four subgroups: groups A (A1 and A2) and groups B (B1 and B2), which were placed in plastic holder units at two distances of 5 cm and 20 cm from RF radiation, respectively. A1 and B1, and A2 and B2 were exposed to RF radiation for six and 10 weeks, respectively. The exposure duration was 5 days/week, 6 hours/day. The third group with two subgroups (sham1 and sham2) were kept in plastic holder units without being exposed to radiation and were evaluated after six and 10 weeks, respectively. The changes in the external diameters of seminiferous tubules and the height of germinal epithelium obviously depended more on the distance from the radiation source than on the exposure time. The decrease in the diameter of the testicles and sperm motility were found to be time-dependent. These effects had a clear but unpredictable dependence on the two variables of distance and RF radiation time.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87517236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Editor's message: sufficient details in a manuscript, originality, and similarity score","authors":"Juan Antonio, Aguilar Garib","doi":"10.1080/08327823.2022.2071810","DOIUrl":"https://doi.org/10.1080/08327823.2022.2071810","url":null,"abstract":"There is no doubt about the value of multimedia and other resources for sharing the advances in the sciences and the arts of a given discipline. They help to grow awareness and interest in different topics, as a sense of what sounds reasonable and what does not. Good quality of the information is essential, as the aim of most journals expresses openly their commitment to being a reliable and trustful source for presenting confirmed advances and findings, validated enough to be a support for building criteria or as a foundation of further research. The information published in the journals is generated by the authors and there are several mechanisms, mostly derived from the scientific method, to ensure as possible that the information that is collected with the intention to be communicated fulfills the mentioned requirements. Peer review of the submitted material is a key element, it is often double-blind performed, seeking to be sure that feedback and criticism responses are included in the manuscript and eventually are available to the readers. Revision of the material does not finish after publication, indeed there is a post review conducted by the readers and those that take the information as the base for their own research. Authors and journals are under continuous evaluation by the readers, some of them will confirm or reject the worthiness of the published material and apply their results or submit new manuscripts that follow the same process, so that finally converge, more than agree, and the conclusion will result in new knowledge. Among the criteria for accepting a paper is the originality, and a sort of tool for evaluating it is known as the ‘Similarity score’, which is the ratio, expressed in percentage, of text in a paper that is found in other sources. This score is becoming one of the acceptance criteria by some journals, as some scoring engines are referred to as plagiarism finders. A high similarity score raises suspicion of plagiarism, which is not, and must not be tolerated, however, other aspects might be considered before concluding about unethical behavior. There are many reports suggesting the maximum acceptable score of similarity, some admit 15% while others consider up to 25%. If this score means plagiarism by itself, then the admissible score must be 0%. However, a fair review must consider other factors that affect this score and that must be pondered with the request of submission. For instance, it is asked to the authors of manuscripts dealing with the derivation of methods that the framework of assumptions is described and justified in detail. In this case, the contribution of the description to the score could be irrelevant, while it is expected that the justification is not a repetition of something found somewhere else. It is understandable that having concerns about the score might be against the request for sufficient information for duplicating the results. Therefore, a probable explanation for scores higher t","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86270268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineralogical properties of ludwigite and the effects of microwave radiation on its particle characteristics and mineral liberation properties","authors":"Wei-jun Huang, T. Jiang, Yajing Liu, Tonglai Guo","doi":"10.1080/08327823.2022.2066770","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066770","url":null,"abstract":"Abstract To effectively separate the valuable minerals in ludwigite, this study investigated the mineralogy of ore, particle-size distribution and mineral liberation characteristics. Most of the magnetite was intergrown with ascharite and serpentine. Nearly half of the serpentine existed in a dense, massive body. Most of the ascharite was encased in magnetite, and a small amount was embedded in the serpentine phase. After the microwave radiation, some intergranular and through cracks were formed to improve mineral liberation during the grinding process. The mass fractions for the +75 μm range decreased from 43.16 wt% for untreated samples to 24.31 wt% for treated samples with a microwave power of 3 kW for 40 s. By contrast, the mass fractions of particles in the −75 μm range increased from 56.84 wt% for untreated samples to 75.69 wt% for treated samples. D 50 decreased from 53.54 µm for the untreated sample to 21.58 µm for the treated sample. The liberation degrees after the treated samples clearly improved and increased by 26.64% for magnetite, 18.92% for ascharite and 14.10% for serpentine.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82769607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The next-generation consumer microwave oven: a review","authors":"Eric F. Brown","doi":"10.1080/08327823.2022.2066772","DOIUrl":"https://doi.org/10.1080/08327823.2022.2066772","url":null,"abstract":"Abstract It seems possible that Solid-State Radio Frequency (RF) transistors will one day replace magnetrons in consumer microwave ovens. These new ovens have the potential to be smaller and more energy efficient. Because they are closed loop systems, they can precisely cook food in ways that consumers have not seen before. This review outlines the basics of Solid-State RF systems and the consumer ovens that are currently available. There are two potential approaches for this new technology: first, the oven could be like current appliances and serve as a reheating device. Second, the oven could take advantage of the new technology to be a high-end cooking appliance. The food industry would be best served by learning more about this technology change and preparing for their products to be cooked using this type of equipment. Due to the even heating and overall consistency of the technology, it is possible that there are benefits to both quality and food safety for this technology.","PeriodicalId":16556,"journal":{"name":"Journal of Microwave Power and Electromagnetic Energy","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89543374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}