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2020 Baltic URSI Symposium (URSI)最新文献

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The type III radio bursts observations on 25th August 2017 with PL612 LOFAR station in Baldy 2017年8月25日Baldy PL612 LOFAR站III型射电暴观测
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254083
B. Dabrowski, P. Flisek, M. Shevchuk, L. Blaszkiewicz, A. Krankowski, A. Froń
{"title":"The type III radio bursts observations on 25th August 2017 with PL612 LOFAR station in Baldy","authors":"B. Dabrowski, P. Flisek, M. Shevchuk, L. Blaszkiewicz, A. Krankowski, A. Froń","doi":"10.23919/URSI48707.2020.9254083","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254083","url":null,"abstract":"We present a few examples of the type III solar radio bursts observed on 25th August 2017 with LOFAR (LOw-Frequency Array) station in Baldy, Poland. This station recorded the solar dynamic spectra in the frequency range from 10 MHz up to 250 MHz. The time and frequency resolution of the spectra were 1 s and 0.39 MHz respectively. The preliminary analysis of these radio events indicate that observations with use of the Baldy LOFAR station, in single mode, can give a lot of interesting results.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116780602","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
The development and the proposed research of LOFAR-Latvia LOFAR-Latvia的发展与研究建议
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254016
A. Vrublevskis, Marcis Donerblics, D. Bezrukovs, B. Ryabov
{"title":"The development and the proposed research of LOFAR-Latvia","authors":"A. Vrublevskis, Marcis Donerblics, D. Bezrukovs, B. Ryabov","doi":"10.23919/URSI48707.2020.9254016","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254016","url":null,"abstract":"The development and the current state of the LOFAR-Latvia station is described. The proposed research is presented in the context of both the surrounding infrastructure of Ventspils International Radio Astronomy Centre (VIRAC) and of the established research directions with the focus on the field of solar and heliospheric physics.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"543 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127235667","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
Investigation of using reflective power sensor for equivalent source reflection measurements 利用反射功率传感器进行等效源反射测量的研究
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254042
Chirkov Igor, Malay Ivan, M. Alexey
{"title":"Investigation of using reflective power sensor for equivalent source reflection measurements","authors":"Chirkov Igor, Malay Ivan, M. Alexey","doi":"10.23919/URSI48707.2020.9254042","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254042","url":null,"abstract":"Describes a method for measuring the equivalent reflection coefficient of feedthrough power standards. The analysis of measurement error and comparisons of results against other methods is done. The proposed method is universal and does not depend from design of feedthrough power meter.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125787282","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
Cell Range Extension Adaptation in Coordinated LTE-A Network 协调LTE-A网络中的小区范围扩展自适应
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254008
Ł. Kułacz, P. Sroka, Adrian Kliks, G. Koudouridis
{"title":"Cell Range Extension Adaptation in Coordinated LTE-A Network","authors":"Ł. Kułacz, P. Sroka, Adrian Kliks, G. Koudouridis","doi":"10.23919/URSI48707.2020.9254008","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254008","url":null,"abstract":"Deployment of small cells in heterogeneous network is directly related to the problem of right user association between macro- and small-cell base station. In order to force just selection of appropriate base station, additional component is added to the measured path loss (signal strength) in order to modify, i.e. virtually extend or squeeze, the cell radius. In this short paper, the authors present the concept of using the Cell Range Extension parameter in coordinated LTE-A networks. Within the coordination area that covers numerous base stations, the values of CRE are tuned in such a way that the achieved network throughout is improved. It is to improve network throughput by proper user assignment to the BS.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127239103","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 Modified Open-Ended Probe as a Reliable Tool for Measurements of Soil Water Content 一种改良的开放式探针作为测量土壤含水量的可靠工具
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254053
A. Woszczyk, J. Szerement, A. Lewandowski, M. Kafarski, A. Szypłowska, A. Wilczek, W. Skierucha
{"title":"A Modified Open-Ended Probe as a Reliable Tool for Measurements of Soil Water Content","authors":"A. Woszczyk, J. Szerement, A. Lewandowski, M. Kafarski, A. Szypłowska, A. Wilczek, W. Skierucha","doi":"10.23919/URSI48707.2020.9254053","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254053","url":null,"abstract":"The work presents the test results of the performance of an open-ended probe with an antenna (OE-A) as an appropriate tool for the measurement of the water content in soil. The measurement volume of OE-A is larger compared to a classical coaxial open-ended (OE) probe, making the considered probe applicable in agrophysics. To correctly assess the reliability of the probe, both numerical simulations and measurements were done. Two types of the mineral soils with different moisture were analyzed in the frequency range 1 MHz – 6 GHz using vector network analyzer (VNA) one port (reflective) measurements.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123997127","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
Q-learning Based Radio Channels Utility Evaluation Algorithm for the Local Dynamic Spectrum Management in Mobile Ad-hoc Networks 基于q学习的移动自组网本地动态频谱管理无线信道效用评估算法
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254037
Krzysztof Malon, J. Łopatka, P. Skokowski
{"title":"Q-learning Based Radio Channels Utility Evaluation Algorithm for the Local Dynamic Spectrum Management in Mobile Ad-hoc Networks","authors":"Krzysztof Malon, J. Łopatka, P. Skokowski","doi":"10.23919/URSI48707.2020.9254037","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254037","url":null,"abstract":"This paper presents advantages of the machine learning used for estimation of specific radio channel usefulness, necessary for dynamic spectrum access. This method enables more efficient use of spectral resources, that are temporarily not used by licensed users. It indicates which channels are the most useful, i.e. give the highest probability of successful transmission and avoidance of interferences. Profile of Q-learning algorithm operation may be controlled by adaptation of the learning rate and greedy parameter.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129695471","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
2020 Baltic URSI Symposium 2020波罗的海URSI研讨会
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/ursi48707.2020.9254032
{"title":"2020 Baltic URSI Symposium","authors":"","doi":"10.23919/ursi48707.2020.9254032","DOIUrl":"https://doi.org/10.23919/ursi48707.2020.9254032","url":null,"abstract":"","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130424882","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
Pulsed fluoride glass fiber laser with near 3 µm operating wavelength 工作波长接近3µm的脉冲氟化物玻璃光纤激光器
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9253763
L. Pajewski, L. Sójka, S. Lamrini, T. Benson, A. Seddon, S. Sujecki
{"title":"Pulsed fluoride glass fiber laser with near 3 µm operating wavelength","authors":"L. Pajewski, L. Sójka, S. Lamrini, T. Benson, A. Seddon, S. Sujecki","doi":"10.23919/URSI48707.2020.9253763","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9253763","url":null,"abstract":"Practical realization of gain-switched Dy3+-doped ZBLAN fiber laser operating at 2.94 µm is reported. The laser is pumped by a 1.1 µm Q-switched ytterbium (III) fiber laser, which was constructed in-house. The ZBLAN fiber laser generates a stable pulse train with repetition rates spanning the range from 25 to 100 kHz. At the repetition rate of 50 kHz, the pulse width is 183 ns while energy and peak power are 0.72 µJ and 4 W, respectively.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126390854","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
Estimation of Comb Structure Capacitance for MEMS Inertial Sensors MEMS惯性传感器梳状结构电容的估计
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254009
J. Nazdrowicz, A. Stawinski, A. Napieralski
{"title":"Estimation of Comb Structure Capacitance for MEMS Inertial Sensors","authors":"J. Nazdrowicz, A. Stawinski, A. Napieralski","doi":"10.23919/URSI48707.2020.9254009","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254009","url":null,"abstract":"In this paper authors presents very important problem of estimation capacitance structures used in MEMS sensors. The importance comes from fact that during operation, inertial sensors which are built of solid materials deform because of external forces acting on them. Therefore typical capacitor consists of some electrodes changes its value because electrode changes its orientation. Here authors use analytical and FEM results to compare capacitance results and impact on accuracy of measurement.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121198091","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
Error Correction in Variable-Temperature Characterization of Material Complex Dielectric Spectrum 材料复介电谱变温表征中的误差校正
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254067
A. Lewandowski, A. Szypłowska, M. Kafarski, A. Wilczek, J. Szerement, W. Skierucha
{"title":"Error Correction in Variable-Temperature Characterization of Material Complex Dielectric Spectrum","authors":"A. Lewandowski, A. Szypłowska, M. Kafarski, A. Wilczek, J. Szerement, W. Skierucha","doi":"10.23919/URSI48707.2020.9254067","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254067","url":null,"abstract":"We present a method for temperature-dependent calibration of a multichannel measurement system for 0.05-3 GHz characterization of material complex dielectric-spectrum. This system, described elsewhere, is based on one-port vector-network-analyzer measurements of a two-port coaxial-cell terminated with a variable load. The nominal system calibration uses multiple coaxial transmission-line sections terminated with a variable termination, and due to a large number of calibration standards is difficult to implement in a multichannel system at multiple temperatures. Therefore, we devised a new variable-temperature calibration approach. In this approach we assume that the temperature variation causes only small changes of the system calibration coefficients, and determine those changes with an approximate calibration technique requiring a lower number of calibration standards. We verify our approach based on measurements of PTFE samples at temperatures from 0 to 40 degrees Celsius.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121233590","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
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