发布求助
文献互助 智能选刊 最新文献

红外与毫米波学报最新文献

筛选
英文 中文
Image Euclidean distance-based manifold dimensionality reduction algorithm for hyperspectral imagery 基于欧氏距离的高光谱图像维数降维算法
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00450
Che Hong
{"title":"Image Euclidean distance-based manifold dimensionality reduction algorithm for hyperspectral imagery","authors":"Che Hong","doi":"10.3724/sp.j.1010.2013.00450","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00450","url":null,"abstract":"Two nonlinear dimensionality reduction methods were proposed based on image Euclidean distance. Considering the physical characters of hyperspectral imagery,the methods introduced image Euclidean distance into traditional manifold dimensionality reduction. Compared w ith other methods,our methods have several advantages. The introduction of image Euclidean distance not only considers hyperspectral image's spatial relationship,but also preserves the local feature of datasets w ell. Thus the proposed methods can discard efficiently the redundant information from both the spectral and spatial dimensions. The experiment results demonstrated that the proposed methods have higher classification accuracy than other methods w hen applied to hyperspectral image classification.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Q-band TE_(01)-TE_(11) high power microwave mode converter q波段TE_(01)-TE_(11)高功率微波模式转换器
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00414
H. Zhang
{"title":"Q-band TE_(01)-TE_(11) high power microwave mode converter","authors":"H. Zhang","doi":"10.3724/sp.j.1010.2013.00414","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00414","url":null,"abstract":"Based on the coupling wave theory and phase re-matching technique,a Q-band TE01-TE11circular w aveguide mode converter for transmitting high pow er microw ave has been designed and analyzed by numerical calculation and simulation. Results of 4-period and 6-period mode converter are demonstrated in this paper. The numerical calculation show that maximum conversion efficiency is 98. 82% and bandw idth is over 2. 2GHz for 4-period structure. How ever,for the6-period one,the maximum conversion efficiency is 99. 89% and bandw idth is over 1. 7GHz. It also presented the influence of the key parameters on the conversion efficiency. Simulated results from HFSS agreed w ell w ith the numerical calculation. Based on the theory and simulated results,a mode converter w as fabricated and tested. It turned out that a pure TE11mode w as abtained.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hyperspectral image classification based on Monte Carlo feature reduction method 基于蒙特卡罗特征约简方法的高光谱图像分类
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00062
Z. Chun
{"title":"Hyperspectral image classification based on Monte Carlo feature reduction method","authors":"Z. Chun","doi":"10.3724/sp.j.1010.2013.00062","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00062","url":null,"abstract":"Hyperspectral image classification is an important research aspect of hyperspectral data analysis.Relevance vector machine(RVM) is widely utilized since it is not restricted to Mercer condition and does not have to set the penalty factor.Due to the high dimension of hyperspectral data,the classification accuracy is severely affected when there are few training samples.Feature reduction is a common method to deal with this phenomenon.However,most of the filter model based feature selection methods can not provide optimal feature selection number.This paper proposes to utilize the statistic estimation characteristic of Monte Carlo random experiments to calculate optimal feature reduction number and conduct hyperspectral image classification with relevance vector machine.Experimental results show the reliability of the feature reduction number calculated by Monte Carlo method.Compared with the classification of original data,there is a significant improvement in the classification accuracy with the feature reduction data.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Numerical analysis of the non-ideal current-voltage characteristics of solar cell 太阳能电池非理想电流-电压特性的数值分析
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00389
Zhao Shou
{"title":"Numerical analysis of the non-ideal current-voltage characteristics of solar cell","authors":"Zhao Shou","doi":"10.3724/sp.j.1010.2013.00389","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00389","url":null,"abstract":"A revised method to evaluate parameters of solar cell from current-voltage characteristics,under illuminated or non-illuminated conditions,w as described. The series resistance( R s),the shunt resistance( R sh),the ideality factor( n),and the reverse saturation current density( J0) were extracted using the two diode circuit model from selected regions of the J-V curves. Using the presented model,more parameters w ith higher fitted precision have been extracted from experimental J-V curves of a CdS / CdTe thin film solar cell than using a single diode circuit one.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of different annealing conditions on the properties of CdS thin films deposited by magnetron sputtering 不同退火条件对磁控溅射沉积CdS薄膜性能的影响
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00298
Z. Chuan
{"title":"Effect of different annealing conditions on the properties of CdS thin films deposited by magnetron sputtering","authors":"Z. Chuan","doi":"10.3724/sp.j.1010.2013.00298","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00298","url":null,"abstract":"CdS thin films were deposited on the substrate at temperature of 300 ℃ by magnetron sputtering. The deposited films were annealed at temperature of 370℃,380 ℃ and 390 ℃,respectively,in either atmosphere of dry air or a mixture of CdCl2and dry air. The morphology,structure and optical properties before and after thermal annealing were investigated. The results show that for samples annealed in dry air,the variations of grain size,surface roughness and visible light transmittance with annealing temperature are not obvious,while the optical band gap increases with temperature increasing. Annealed in the mixture of CdCl2and dry air,recrystallization and grain growth in the samples are significant. Surface roughness increases with temperature increasing,on the contrary,visible light transmittance and optical band gap decreases. These phenomena are the results of changes in the temperature of recrystallization and doping concentration in the band tail states at different annealing atmosphere.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"162 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Establishing continuous scaling of NDVI based on fractal theory and GEOEYE-1 image 基于分形理论和GEOEYE-1影像建立NDVI连续尺度
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00538
Luan Hai
{"title":"Establishing continuous scaling of NDVI based on fractal theory and GEOEYE-1 image","authors":"Luan Hai","doi":"10.3724/sp.j.1010.2013.00538","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00538","url":null,"abstract":"The continuous spatial scaling model(CSSM) of NDVI based on fractal theory was proposed and implemented.Based on GEOEYE-1 image and taking NDVI as experimental object,the paper studied the availability of fractal methodology for high-resolution image,and discussed the selection of the best reasonable scale-level for establishing NDVI's CSSM.It w as concluded that the fractal methodology is suitable for high-resolution RS image.In some definite conditions,the best reasonable scale-level for establishing NDVI's CSSM exists and can be computed.For the fractal methodology,the results in the paper extended its available range of retrievals and image's resolutions.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Gaussian process latent variable model based on immune clonal selection for SAR target feature extraction and recognition 基于免疫克隆选择的高斯过程潜变量模型SAR目标特征提取与识别
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00231
Zhang Xiang
{"title":"Gaussian process latent variable model based on immune clonal selection for SAR target feature extraction and recognition","authors":"Zhang Xiang","doi":"10.3724/sp.j.1010.2013.00231","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00231","url":null,"abstract":"As a nonlinear dimension reduction algorithm,Gaussian process latent variable model(GPLVM) has been widely applied in pattern recognition and computer vision for its capability in dealing with small size and high-dimensional samples.As GPLVM can discover low-dimensional manifolds in high-dimensional data given only a small number of samples,a new SAR target recognition method was proposed,in which a modified GPLVM was used for feature extraction and Gaussian process classification was employed as the classifier.In GPLVM,the likelihood was optimized by using the scaled conjugate gradient.In order to avoid the noise effect to gradient estimate and overcome the disadvantage that the performance is severely affected by the step length,the immune clone selection algorithm based GPLVM was developed for target feature extraction where the immune clonal selection algorithm characterized by rapid convergence to global optimum was utilized to improve the performance.The experimental results show that the method not only reduces the dimension but also gets higher accuracy.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Aerosol optical depth determined by integration of the HJ CCD and IRS data 综合HJ CCD和IRS数据确定气溶胶光学深度
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/SP.J.1010.2013.00277
Guo Rui-Fane, Wang Xiuzhen, Sheng Li, Huang Jingfeng
{"title":"Aerosol optical depth determined by integration of the HJ CCD and IRS data","authors":"Guo Rui-Fane, Wang Xiuzhen, Sheng Li, Huang Jingfeng","doi":"10.3724/SP.J.1010.2013.00277","DOIUrl":"https://doi.org/10.3724/SP.J.1010.2013.00277","url":null,"abstract":"","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69889205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
浑浊II类水体叶绿素a浓度遥感反演(II):MERIS遥感数据的应用 浑浊II类水体叶绿素a浓度遥感反演(II):MERIS遥感数据的应用
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/SP.J.1010.2013.00372
姜广甲, 周琳, 马荣华, 段洪涛, 尚琳琳, 饶加旺, 赵晨露
{"title":"浑浊II类水体叶绿素a浓度遥感反演(II):MERIS遥感数据的应用","authors":"姜广甲, 周琳, 马荣华, 段洪涛, 尚琳琳, 饶加旺, 赵晨露","doi":"10.3724/SP.J.1010.2013.00372","DOIUrl":"https://doi.org/10.3724/SP.J.1010.2013.00372","url":null,"abstract":"基于2004～2010年太湖4次野外观测数据,结合MERIS遥感资料,评价两波段、三波段、改进三波段和四波段4个模型在浑浊Ⅱ类水体叶绿素a浓度估算的精度,并利用太湖(13个有效样点)以及巢湖(21个有效样点)进行模型验证.结果表明,改进三波段模型反演叶绿素a浓度较高,更适于浑浊Ⅱ类水体叶绿素a浓度的遥感反演,决定系数R2在0.34～0.94之间变化,RMSE变化范围为:3.17 ～ 8.70 μg/L.分季节率定改进三波段模型参数,并建立太湖水体春、夏、秋、冬季的模型输入参数查找表,最终将改进三波段模型应用于MERIS遥感影像(8、9、10波段),获取太湖水体叶绿素a浓度的空间分布和年内、年际变化.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"32 1","pages":"372-378"},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Extraction of refractive indices of materials through transmission terahertz time-domain spectroscopy 透射太赫兹时域光谱法提取材料折射率
IF 0.7 4区 物理与天体物理
红外与毫米波学报 Pub Date : 2013-01-01 DOI: 10.3724/sp.j.1010.2013.00160
Chen Li
{"title":"Extraction of refractive indices of materials through transmission terahertz time-domain spectroscopy","authors":"Chen Li","doi":"10.3724/sp.j.1010.2013.00160","DOIUrl":"https://doi.org/10.3724/sp.j.1010.2013.00160","url":null,"abstract":"For samples with distinguishable echoes in detected transmission pulses,we mainly use the phase difference between the detected pulses to extract their refraction indices by transmission terahertz time-domain spectroscopy.Specifically,there are two methods.The first one requires the reference pulse and the first terahertz pulse transmitted through the sample;the second one requires the terahertz pulse transmitted through the sample and the second transmitted pulse after two reflections in the sample.However,in practice,there exists an angle between the incident terahertz beam and the surface normal of the sample.Yet,this angle is not easy to measure.So,in calculation we usually ignore this angle,which often causes error in the extracted refractive indices.In addition,this error is related with the selected method.In this article,after analyzing deviations of the refractive indices resulting from the angle when using the two methods,we propose a method to correct the extracting refractive indices.Our method could theoretically eliminate errors that are caused by the angle.Experiments further prove that this correction method is effective.","PeriodicalId":50181,"journal":{"name":"红外与毫米波学报","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2013-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69888818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信