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2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory最新文献

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On signal generation in enclosing strata when predicting mining -geological conditions of occurrence of coal beds by underground seismics methods 地下地震方法预测煤层赋存的开采地质条件时围合地层的信号产生
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671832
A. Antsyferov, M. Tirkel, V. A. Antsyferov, O. Glukhov
{"title":"On signal generation in enclosing strata when predicting mining -geological conditions of occurrence of coal beds by underground seismics methods","authors":"A. Antsyferov, M. Tirkel, V. A. Antsyferov, O. Glukhov","doi":"10.1109/DIPED.2008.4671832","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671832","url":null,"abstract":"The paper contains results of theoretical analysis that indicate the possibility of using the sources located in enclosing strata in immediate vicinity of the seam to conduct prediction seismic experiments in conditions of the Donetsk Coal Basin.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122333144","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
Antenna gain and pattern measurement in a Fresnel zone 菲涅耳区天线增益和方向图测量
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671806
B. Levin
{"title":"Antenna gain and pattern measurement in a Fresnel zone","authors":"B. Levin","doi":"10.1109/DIPED.2008.4671806","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671806","url":null,"abstract":"The method of calculation of a gain measurement error for antenna placed in a Fresnel zone applies to a case of no uniformly exited antennas. The question, as an arrangement in a Fresnel zone has an effect at a measurement of antenna pattern, is considered. Numerical results are given.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784350","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
On the theory of Uda-Yagi type antenna 论乌达八木型天线的原理
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671808
G. Kevanishvili, I. Kevanishvili, K. Kotetishvili, G. Chikhladze
{"title":"On the theory of Uda-Yagi type antenna","authors":"G. Kevanishvili, I. Kevanishvili, K. Kotetishvili, G. Chikhladze","doi":"10.1109/DIPED.2008.4671808","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671808","url":null,"abstract":"For Uda-Yagi type antenna the system of integral equations, where the unknown functions are the axial currents arising at antenna dipoles, is received in strict mathematical approach. The method of delta-like generalized function is used, and this system reduces to the system of functional (summatory) equations relative to Fourierpsilas coefficients of the axial currents. The solution of this system makes possible to determine the values of given currents and, based on it, to calculate the radiation characteristic of the antenna For the definite situations the numerous results are presented.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116293490","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
Periodically non-stationary methods for investigation the degradation of the turbo-set friction bearings 汽轮机组摩擦轴承劣化研究的周期性非平稳方法
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671837
I. Isayev, Ihor Javorskyj, I. Kravets
{"title":"Periodically non-stationary methods for investigation the degradation of the turbo-set friction bearings","authors":"I. Isayev, Ihor Javorskyj, I. Kravets","doi":"10.1109/DIPED.2008.4671837","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671837","url":null,"abstract":"A new approach for the fault detection of the turbo-set friction bearings, based on the investigation the periodically non-stationary properties of vibration signals, is analyzed.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114710362","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 novel concept of a homodyne microwave sensor performance: Progress report 纯差微波传感器性能的新概念:进展报告
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671816
Z. Machavariani, B. Khvitia, Z. Chakhnakia, N. Khuchua
{"title":"A novel concept of a homodyne microwave sensor performance: Progress report","authors":"Z. Machavariani, B. Khvitia, Z. Chakhnakia, N. Khuchua","doi":"10.1109/DIPED.2008.4671816","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671816","url":null,"abstract":"The mathematical description of the systems consisting of a quadrature microwave sensor (MS) of homodyne configuration, antenna and target is performed based on the well-known energy relation between the signal power and the distance under free-space conditions. The original approach to the homodyne MS operation was developed for the case of RF oscillator frequency, f variations with discrete steps, Deltafn. A number of important advantages of the proposed MS concept are described.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"705 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116967800","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
Satellite broadband internet everywhere for enterprises, organisations, governmental institutions and consumers 为企业、组织、政府机构和消费者提供无处不在的卫星宽带互联网
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671791
T. Lohrey
{"title":"Satellite broadband internet everywhere for enterprises, organisations, governmental institutions and consumers","authors":"T. Lohrey","doi":"10.1109/DIPED.2008.4671791","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671791","url":null,"abstract":"In a collaborative effort with ViaSat, Eutelsat is taking a step towards transforming the satellite broadband market in Europe and the Mediterranean Basin. Today, Toowaytrade can already significantly expand the quality, capability, and availability of high-speed broadband satellite services for consumers and enterprises. The launch in 2010 of KA- SAT, that also covers and could serve the entire territory of Georgia will mark a further major leap forward in the provisioning of advanced broadband services via satellite to users beyond terrestrial networks who only have the prospect of dial-up to look forward to in order to benefit from the social and commercial advantages of the digital environment.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134411288","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
Efficient MOM-based technique for fast analysis of layered microstrip geometries using equivalent glass antenna model 基于等效玻璃天线模型的层状微带几何快速分析技术
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671818
F. Bogdanov, D. Karkashadze, R. Jobava
{"title":"Efficient MOM-based technique for fast analysis of layered microstrip geometries using equivalent glass antenna model","authors":"F. Bogdanov, D. Karkashadze, R. Jobava","doi":"10.1109/DIPED.2008.4671818","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671818","url":null,"abstract":"Based on modified mirror image method, an equivalent model of layered glass antenna structure is suggested and validated by comparison with traditional Greenpsilas function Sommerfeld solution. The derived approximate Greenpsilas function is applied to consider finite-sized glass antennas integrated into a full car model. The obtained hybrid MoM scheme is validated by comparison with measurements on simplified finite-sized model. Finally, this scheme will be applied for prediction of EMC characteristics of full car model with incorporated glass antenna.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134401731","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: 3
On improved acoustic resolution for ultrasound imaging 超声成像声学分辨率的改进研究
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671834
A. Lev-Or, M. Porat
{"title":"On improved acoustic resolution for ultrasound imaging","authors":"A. Lev-Or, M. Porat","doi":"10.1109/DIPED.2008.4671834","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671834","url":null,"abstract":"Acoustic imaging exhibits inherent geometric distortions due to variations in sound speed within the body. Additional distortions are missing surfaces, speckle noise, acoustic shadows and resolution inconsistency. These artifacts depend on the positioning of the transducer relative to the scanned organs, and considerably degrade the images obtained. We propose an efficient algorithm that combines ultrasound images taken from different angles using compounding to obtain a quality-enhanced image. The algorithm is iterative. In each step the images are divided into blocks and a matching procedure is performed. The gray level information is translated according to the imaging constraints, resulting in warped acoustic images that function as the input signal to the following iteration. The algorithm was implemented successfully and the results are presented and discussed.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123538301","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
Dielectric slab parameters estimation using “quasiduration”-based objective function minimization with genetic algorithm 基于准定性的目标函数最小化遗传算法的介电板参数估计
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671801
S. Alexin, O. Drobakhin, O.O. Plakhotya
{"title":"Dielectric slab parameters estimation using “quasiduration”-based objective function minimization with genetic algorithm","authors":"S. Alexin, O. Drobakhin, O.O. Plakhotya","doi":"10.1109/DIPED.2008.4671801","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671801","url":null,"abstract":"The problem of single dielectric slab parameters estimation on the basis of reflectometry data taken in microwave band is considered using objective function minimization approach. The ldquoquasidurationldquo-based objective function formed from frequency reflection coefficient samples is shown to be more appropriate in comparison with standard robust objective function. The method of estimation was tested on numerically synthesized reflection-coefficient data using genetic algorithm for global minimum searching.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126062870","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
Alternating magnetic fields as an instrument for technical diagnostics of the rail damages 交变磁场在钢轨损伤技术诊断中的应用
2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory Pub Date : 2008-11-17 DOI: 10.1109/DIPED.2008.4671802
V. Nichoga, P. Dub, V. Ivanchuk
{"title":"Alternating magnetic fields as an instrument for technical diagnostics of the rail damages","authors":"V. Nichoga, P. Dub, V. Ivanchuk","doi":"10.1109/DIPED.2008.4671802","DOIUrl":"https://doi.org/10.1109/DIPED.2008.4671802","url":null,"abstract":"Electromagnetic methods, which are based on determination of the characteristics of the electromagnetic fields radiated by inspected objects when alternating electrical currents flow in them, are widely used in engineering practice.","PeriodicalId":178792,"journal":{"name":"2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132252801","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
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