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RADIO-FREQUENCY IMAGING IN GEOPHYSICAL APPLICATIONS. 射频成像在地球物理中的应用。
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689313
C. Balanis, R. Radcliff, H. Hill
{"title":"RADIO-FREQUENCY IMAGING IN GEOPHYSICAL APPLICATIONS.","authors":"C. Balanis, R. Radcliff, H. Hill","doi":"10.1080/16070658.1983.11689313","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689313","url":null,"abstract":"AbstractX-ray reconstructive imaging (tomography) has found an incredible range of applications, from microscopy to astrophysics. Radio-frequency imaging has a similar potential which has not yet been fully realized: geophysical uses alone include exploration, mining, and underground process monitoring. Reconstructive imaging to date has been largely based on the explicit assumption of straight line propagation between source and receiver. This is much more valid for X-rays than for radio waves in an underground environment, and the relative lack of success of RF imaging can be largely attributed to this simplification. In this paper, a geophysical imaging technique is being proposed which reconstructs the unknown environment from cross-borehole measurements of RF electromagnetic wave transmission. Unlike some previous methods which assume straight-ray transmission, the technique explicitly accounts for refraction and first-order reflection in the reconstruction process. Several examples of images of unde...","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"18 1","pages":"83-93"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86987258","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: 4
Influence of Load Location in Mode Tuning of Microwave Ovens 负载位置对微波炉模式调谐的影响
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689324
E. A. El-Sayed, S. S. Farghaly
{"title":"Influence of Load Location in Mode Tuning of Microwave Ovens","authors":"E. A. El-Sayed, S. S. Farghaly","doi":"10.1080/16070658.1983.11689324","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689324","url":null,"abstract":"AbstractA theoretical investigation is made of the effect of varying the location of the load in tuning behaviour of microwave ovens. Effect of dielectric losses is also taken into account. The computed data are for the dimensions of a rectangular cavity of a commercial microwave oven and at the heating frequency of 915 MHz. The analysis concerns both transverse electric (TE) and transverse magnetic (TM) modes, using ‘the transverse resonance method’. Profiles of resonant frequency of several modes are given as a function of thickness, dielectric properties, and location of the processed material.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"91 1","pages":"197-207"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83937986","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: 7
FREQUENCY DEPENDENT DIELECTRIC AND CONDUCTIVITY RESPONSE OF SEDIMENTARY ROCKS. 沉积岩的频率相关介电和电导率响应。
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689314
P. Sen, W. Chew
{"title":"FREQUENCY DEPENDENT DIELECTRIC AND CONDUCTIVITY RESPONSE OF SEDIMENTARY ROCKS.","authors":"P. Sen, W. Chew","doi":"10.1080/16070658.1983.11689314","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689314","url":null,"abstract":"AbstractIn this paper we describe quantitively how the conductivity and the dielectric constant of water-filled rocks depend on textural and interfacial effects. The grain shape determines the Archie’s exponent for the dc conductivity as well as the frequency dependent dielectric constant. The large values of dielectric constant can arise from platey grains. Platey grains also give rise to large frequency and salinity dependences of the dielectric constant. The interfacial effects are particularly important in clayey systems. The polarization of interfacial ions gives rise to large values of dielectric constant and affects the rock conductivity.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"119 1","pages":"95-105"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74970640","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: 54
Observations on the Density Dependence of Dielectric Properties of Particulate Materials 颗粒材料介电特性的密度依赖性观察
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689319
S. Nelson
{"title":"Observations on the Density Dependence of Dielectric Properties of Particulate Materials","authors":"S. Nelson","doi":"10.1080/16070658.1983.11689319","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689319","url":null,"abstract":"AbstractBased on information in the published literature, the analysis reported herein indicates that linear relationships can be expected between functions of the dielectric properties of particulate materials and their densities. The linearity of the square root of the dielectric constant of the air-particle mixture with mixture density and the linearity of the cube root with density are consistent with published mixture formulae that imply the additivity of the volume-weighted square roots and cube roots, respectively, of the dielectric constants of the constituents of the mixture. Although both relationships should be valid for most practical applications, the cubic relationship predicted the dielectric constants of pulverized coal, whole-wheat flour, and whole-kernel wheat more accurately than did the quadratic relationship. Accuracy of the predictions decreased with increasing particle size. A linear relationship was also demonstrated between √ϵ″r + e and density, where √″r represents the dielectric...","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"45 1","pages":"143-152"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76848877","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: 84
Interaction of Microwave Energy with Fuel Precursors 微波能与燃料前驱体的相互作用
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689307
E. Wall
{"title":"Interaction of Microwave Energy with Fuel Precursors","authors":"E. Wall","doi":"10.1080/16070658.1983.11689307","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689307","url":null,"abstract":"Synthetic fuel and fuel gas have been produced by microwave interaction with fuel precursors, particularly oil shale and Colorado coal. Preliminary results with lignite, tar sands, and viscous crudes also show promise. The derived products have been analyzed using a microcoulometric system and important differences in oil flow properties and gas composition are discussed. The objectives of the study, presented in this paper, were designed to provide accurate and precise data on the nitrogen, sulfur, carbon, hydrogen, and on the water, gases, and oil, both from microwave retorting procedures and on parallel Fischer assay tests. The microwave equipment used in this study consisted of a modified commercial microwave oven, together with a specially designed, stainless steel, high temperature and pressure retort.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"44 1","pages":"31-36"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77943150","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: 1
Polymerization and Surface Treatment in a Large Volume Microwave Plasma Generator 大体积微波等离子体发生器中的聚合和表面处理
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689337
H. Jullien, R. Bosisio
{"title":"Polymerization and Surface Treatment in a Large Volume Microwave Plasma Generator","authors":"H. Jullien, R. Bosisio","doi":"10.1080/16070658.1983.11689337","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689337","url":null,"abstract":"AbstractSeveral experiments are reported oe the curing and cross-linking of polymer films deposited on metals and non-metals with the aim of evaluating the large volume microwave plasma generator (LMP®) technology. The LMP® technology allows, in principle, the generation of a low-temperature plasma of any desired length and it is therefore of great interest in industrial processes involving the treatment of large surface areas. This paper attempts to evaluate some plasma-polymer coatings produced on various metallic and non-metallic surfaces. It is shown that polyurethane films deposited on metal surfaces are effectively and quickly cross-linked when exposed to an argon microwave plasma; in addition, plasma-polymer coatings were formed from styrene and methylmethacrylate vapours introduced into the LMP reactor. The deposition of such plasma-polymers produced, in most cases, resistant and strongly adhesive coatings. However, the plasma-polymer coating was not found to possess a regular structure. Instead i...","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"17 1","pages":"319-324"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91332700","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: 2
Dielectric Properties of New Brunswick Oil Shale New Brunswick油页岩介电特性研究
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689311
W. E. Briggs, J. Lewis, J. Tranquilla
{"title":"Dielectric Properties of New Brunswick Oil Shale","authors":"W. E. Briggs, J. Lewis, J. Tranquilla","doi":"10.1080/16070658.1983.11689311","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689311","url":null,"abstract":"AbstractDielectric properties of New Brunswick oil shale have been obtained as functions of frequency and temperature over selected bands from 100 MHz to 12 GHz and at temperatures from 20°C to 250°C. The results show considerable variation, but are consistent with data produced by other workers for western U.S. oil shale.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"87 1","pages":"75-82"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84209376","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: 5
Effects of microwave cooking on textural characteristics of battered and breaded fish products 微波蒸煮对鱼碎和面包屑制品质地特性的影响
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689341
Laura Lopez-Gavito, G. M. Pigott
{"title":"Effects of microwave cooking on textural characteristics of battered and breaded fish products","authors":"Laura Lopez-Gavito, G. M. Pigott","doi":"10.1080/16070658.1983.11689341","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689341","url":null,"abstract":"AbstractResulting texture after microwaving battered and breaded fish products was found to be the major problem concerning the use of microwave energy in place of deep-frying for processing such products. Texture was highly improved when the conventional batter formulation was modified by substituting water for partially hydrogenated soybean oil, and using a modified waxy maize starch in the batter slurry. Low power settings (327 W/hr) had less critical effects on the texture than higher power settings. Sensory scores given to the micro waved products with the modified batter and breading formulation were similar to those given to the deep-fried products. The first choice preference ranking after freezing and reheating was given to the microwaved products.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"1 1","pages":"345-353"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74771485","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: 8
Measurement of the Complex Permittivity of Food Products during Microwave Power Heating Cycles 微波加热循环中食品复合介电常数的测定
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689342
C. Akyel, R. Bosisio, R. Chahine, T. Bose
{"title":"Measurement of the Complex Permittivity of Food Products during Microwave Power Heating Cycles","authors":"C. Akyel, R. Bosisio, R. Chahine, T. Bose","doi":"10.1080/16070658.1983.11689342","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689342","url":null,"abstract":"AbstractA single mode active cavity (SMAC) perturbation technique operating with high level microwave power has been developed to heat and measure, at the same time, the permittivity of sample materials at 2.2 GHz. The accuracy of the SMAC measurement technique is compared with a series of permittivity measurements made on a number of identical liquid dielectrics using time domain spectroscopy (TDS) techniques. It is found that SMAC microwave power heat cycles on food products produced temperature permittivity hysteresis effects. Such hysteresis effects were previously observed on materials heated inside microwave ovens. A more complete characterization of the microwave heating hysteresis effect for food products may be of some interest in microwave food processing.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"44 1","pages":"355-365"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83715786","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: 21
Microwave Heating of New Brunswick Oil Shale 新不伦瑞克省油页岩微波加热研究
The Journal of microwave power Pub Date : 1983-01-01 DOI: 10.1080/16070658.1983.11689308
J. R. Butts, J. Lewis, F. Steward
{"title":"Microwave Heating of New Brunswick Oil Shale","authors":"J. R. Butts, J. Lewis, F. Steward","doi":"10.1080/16070658.1983.11689308","DOIUrl":"https://doi.org/10.1080/16070658.1983.11689308","url":null,"abstract":"AbstractMicrowave energy is used to heat New Brunswick oil shale to pyrolysis temperatures. Chromatographic analysis of the liberated gases revealed the presence of carbon monoxide, carbon dioxide, methane, ethane, ethylene, and acetylene. Average oil yield was 90.6% of the Fischer assay. Net energy ratio (energy out/energy in) of 3 is predicted for a moderate grade shale of 22 U.S. gal/ton.","PeriodicalId":76653,"journal":{"name":"The Journal of microwave power","volume":"2 1","pages":"37-43"},"PeriodicalIF":0.0,"publicationDate":"1983-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84541325","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: 6
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