2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)最新文献_第5页

Switchable terahertz polarization conversion via phase-change metasurface 通过相变超表面的可切换太赫兹偏振转换

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8261714

Xiaofang Wu, F. Lan, Zongjun Shi, Ziqiang Yang

引用次数: 4

Terahertz biomedical imaging: From multivariate analysis and detection to material parameter extraction 太赫兹生物医学成像:从多变量分析和检测到材料参数提取

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262222

A. Al-Ibadi, J. Sleiman, Q. Cassar, G. MacGrogan, H. Balacey, T. Zimmer, P. Mounaix, Jean-Paul Guillet

{"title":"Terahertz biomedical imaging: From multivariate analysis and detection to material parameter extraction","authors":"A. Al-Ibadi, J. Sleiman, Q. Cassar, G. MacGrogan, H. Balacey, T. Zimmer, P. Mounaix, Jean-Paul Guillet","doi":"10.1109/PIERS.2017.8262222","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262222","url":null,"abstract":"Terahertz imaging is an interesting route for biomedical analysis. In particular, cancer imaging is a subject of study for different teams [1,2]. A work is done in Bordeaux in partnership with a hospital to do terahertz analysis of breast tissue. This work is done in reflection with time domain imaging setup with fresh samples. The aim is to accurately assess tumor margins and which could in the future allow a quick validation of the precision of the surgical procedure and know if new surgery should be performed. We have presented in a previous paper [3] the use of automatic methods of image generation with different parameters [4] in order to explore the different contrasts that exist in the time and frequency domain data of a terahertz imaging system. These methods make it possible to locate and identify areas containing breast tissue, cancer or fat. In this communication, we propose to present new results and images with both multivariate approaches (like multivariate component analysis) and material parameter extraction to give both 2D localization and comprehensive parameter description.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122689048","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

An LP-DOAS instrument with a laser driven light source for open-path measurement of atmospheric NO2 in Shanghai 基于激光驱动光源的LP-DOAS仪器在上海开放路径大气NO2测量中的应用

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8261706

Mingzhi Li, Jun Chen, M. Su, Huinan Yang, Arun Ramachandran, R. Varma

{"title":"An LP-DOAS instrument with a laser driven light source for open-path measurement of atmospheric NO2 in Shanghai","authors":"Mingzhi Li, Jun Chen, M. Su, Huinan Yang, Arun Ramachandran, R. Varma","doi":"10.1109/PIERS.2017.8261706","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261706","url":null,"abstract":"Shanghai is currently faced with the complex atmospheric pollution problem such as ozone (O3) and PM2.5. O3 is responsible for oxidization of atmospheric constituents that in turn produces secondary pollutants. Reducing atmospheric oxidation is the underpinning strategy for the prevention and control of pollution in this city. According to the observation data from the online automatic monitoring station of Shanghai, the city's O3 concentration has been rising steadily. In 2013, there are 100 days with ozone as the main pollutants, accounted for 31.9%. By Leighton relationship (K6[O3][NO]=K4[NO2] = 1), concentration of O3 is closely related to that of NO2. So, continuous monitoring of atmospheric NO2 has important significance. An instrument was developed for measuring atmospheric NO2 concentration using a powerful light source in conjunction with the long-path differential optical absorption spectroscopy (LP-DOAS) technique. This system installed at the central section of Shanghai used a laser driven light source (LDLS) and a sensitive TE cooled spectrometer. The LDLS showed better stability, high optical efficiency when compared to traditional arc lamp and light emitting diodes. The light sent into the atmosphere was returned by a retro reflecting mirror placed 1.3km away, and the light returned was sent to a high sensitive TE cooled spectrometer. The spectral range of measurement was 415–455nm and the spectra collected were averaged over 10 min, prior to analyzing for NO2 concentration. Continuous observations were carried out for two weeks and the NO2 concentration retrieved ranged from (20–600) ug/m3 with an estimated detection limit of 6.77 ug/m3. The measurement results indicate that it is feasible to use this instrument for detecting the NO2 with high spatial and temporal sensitivity.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129118529","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

Electrical impedance tomography in the testing of material defects 材料缺陷检测中的电阻抗层析成像

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8261712

T. Kríz, J. Dušek

{"title":"Electrical impedance tomography in the testing of material defects","authors":"T. Kríz, J. Dušek","doi":"10.1109/PIERS.2017.8261712","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261712","url":null,"abstract":"The paper describes using electrical impedance tomography in non-destructive material testing. Under certain Neumann and Dirichlet boundary conditions, the forward EIT computation yields an estimation of the electric potential field in the interior of the volume. The FEM, in 2D or 3D, is exploited for the forward problem with current sources. Image reconstruction in EIT is an inverse problem, usually presented as minimizing a suitable objective function. To minimize this function, we can use the deterministic approach based on the method of least squares. Due to the ill-posed character of the problem, a regularization procedure, such as that embodied in standard Tikhonov regularization, has to be used. Electrical impedance tomography is a widely employed approach with numerous applications in, for example, physics and biology. As regards the former discipline, geophysical imaging is utilized in both searching underground conducting fluid columns near the surface and obtaining information about rock porosity or fracture formation. Other applications of EIT include the non-destructive testing and identification of material defects such as cracks or the identification of corrosion in materials.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128572992","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

Toroidal dipole associated resonant forward scattering of light by silicon nanoparticles 硅纳米粒子环向偶极子相关光的共振前向散射

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262140

P. Terekhov, K. Baryshnikova, A. Shalin, A. Karabchevsky, A. Evlyukhin

引用次数: 4

Spectral effective solutions for mixed line rate WDM-PON systems 混合线速率WDM-PON系统的频谱有效解决方案

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262037

I. Kurbatska, V. Bobrovs, A. Alsevska, I. Lyashuk, L. Ģēģere

{"title":"Spectral effective solutions for mixed line rate WDM-PON systems","authors":"I. Kurbatska, V. Bobrovs, A. Alsevska, I. Lyashuk, L. Ģēģere","doi":"10.1109/PIERS.2017.8262037","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262037","url":null,"abstract":"The paper analyses the solutions of increasing the spectral efficiency (SE) of multiple line rate (MLR) wavelength-division-multiplexing passive optical network (WDM-PON). Paper analyses the increasing the SE of WDM-PON by applying of mixed transmission system with MLR. The MLR approach allows implementing gradual transition to higher data rates within the limited expenses. The main goal of the paper is to establish the most spectral-effective solution for applying the eight channels with 40Gbit/s line rate in sixteen channel 10Gbit/s transmission system. Duobinary (DB) modulation format is used for channels with 40Gbit/s line rate, while the non-return-to-zero (NRZ) is used for 10Gbit/s channels. For the increasing of SE we apply unequal channel spacing between different channels. The paper concentrates on the determination of minimal channel spacing realizable by two 10Gbit/s channels, as well as between two 40 Gbit/s channels and between 10 Gbit/s and 40 Gbit/s channels. For ensuring maximal possible SE, different channel topologies are considered to ensure the most effective optimization of channel spacing. The paper also evaluates the main limiting factors of SE and system performance, analysing the impact of chromatic dispersion and non-linear effects.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115828782","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

Generation of highly-chirped dissipative solitons in Er-doped all-fiber oscillator 掺铒全光纤振荡器中高啁啾耗散孤子的产生

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262006

I. Zhdanov, D. Kharenko, E. Podivilov, S. A. Babin, Alexander Apolonski, A. Bednyakova, M. Fedoruk, S. Turitsyn

引用次数: 0

A novel reconfigurable electromagnetically induced transparency based on solid state plasma 一种基于固态等离子体的新型可重构电磁诱导透明材料

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262059

Xue Feng, Shaobin Liu, Hai‐feng Zhang, Yongdiao Wen, X. Kong, Lingling Wang

引用次数: 1

A wideband dual circular polarization feed chain for satellite antennas at K/Ka bands 一种用于K/Ka波段卫星天线的宽带双圆极化馈源链

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8261737

J. Gong, Qiao Li, Ming-tao Zhang, Jianjun Hou, Yang Wang, Zhi Xu

引用次数: 4

The radar absorption properties of the hollow Fe3O4 microspheres synthesized by the plasma dynamic method 用等离子体动力学方法合成的Fe3O4空心微球的雷达吸收特性

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) Pub Date : 2017-05-22 DOI: 10.1109/PIERS.2017.8262247

I. Shanenkov, A. Sivkov, A. Ivashutenko, V. Zhuravlev, Guodong Wei, Guangshe Li, W. Han

{"title":"The radar absorption properties of the hollow Fe3O4 microspheres synthesized by the plasma dynamic method","authors":"I. Shanenkov, A. Sivkov, A. Ivashutenko, V. Zhuravlev, Guodong Wei, Guangshe Li, W. Han","doi":"10.1109/PIERS.2017.8262247","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262247","url":null,"abstract":"This work presents the investigations of the radar absorbing properties of the hollow magnetite microspheres. They were produced in one short-time process of the plasma dynamic synthesis. The obtained particles was separated into fractions with sizes from 3 μm to 30 μm (fraction 1), from 30 μm to ∼ 100 μm (fraction 2) and the fraction with size greater than 100 μm (fraction 3). In order to investigate the microwave characteristics of materials, the selected fractions of the hollow microspheres were placed in an epoxy compound. The weight content of the filler in the compound was equal to ≈ 50%. The electromagnetic response of the samples was studied in the coaxial waveguide on the toroidal samples with thickness t = 2.2 mm. It was found that particles with sizes ≤ 30 μm provide the greatest signal attenuation up to −40 dB at the frequency ∼ 10.5 GHz. There is also a shift of the absorption maxima in the region of low frequencies with increase in the size of hollow spheres. The samples provide a reflection coefficient smaller than −10 dB in following frequency ranges: 8.8 + 16.2 GHz (No. 1), 7.4 + 11.3 GHz (No. 2) and 3.7 + 5.0GHz (No. 3). Thus, fraction 1 has a band of operating frequencies at the −10dB level of almost an octave. The sample on the base of initial synthesized powder allows attenuating the EM signal (below −10 dB) in the frequency range from 3.7 to 15.6 GHz, due to the presence of particles with a broad size distribution.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124268384","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