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WFS-201(S66)型超外差收音机的安装与调试
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作者 李永雄 《广东教育(职教)》 2013年第1期37-38,共2页
本文从作者的教学实践出发,分析了WFS-201(S66)型超外差收音机的安装与调试。
关键词 WFS-201(S66)外差收音机 安装与调试
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别具特色的索尼ICF-SW7600GR型收音机
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作者 乔晓斌 李东海 《电子制作》 2002年第11期48-48,共1页
索尼ICF—SW7600GR型超外差式收音机是一款功能全面、接收的频率范围宽的收音机。它具有调频波段(FM):76—108MHz、87.5—108MHz;短波波段(SW):1620——29999kHz,2250——26100kHz;中波波段(MW):530——1620kHz,长波波段(LM):... 索尼ICF—SW7600GR型超外差式收音机是一款功能全面、接收的频率范围宽的收音机。它具有调频波段(FM):76—108MHz、87.5—108MHz;短波波段(SW):1620——29999kHz,2250——26100kHz;中波波段(MW):530——1620kHz,长波波段(LM):150——529kHz、150——285kHz。另外本机还可接收SSB(单边带)和CW(等幅波)发射的无线电波。 展开更多
关键词 索尼ICF—SW7600GR外差式收音机 接收频率 调频波段 短波波段 长波波段
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毫米波FMCW收发组件技术研究 被引量:1
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作者 何敏敏 孙微波 +5 位作者 黄振起 冯委 胡建凯 王勇 李宝令 陶若燕 《固体电子学研究与进展》 CAS CSCD 北大核心 1999年第1期52-58,共7页
提出了毫米波FMCW收发组件设计模型。针对这类系统特有的1/f噪声和FMAM变换噪声,设计了一种新颖的外差型94GHz和35GHzFWCW收发组件。线性调频带宽1000MHz,发射功率20~50mW,目标检测灵敏度... 提出了毫米波FMCW收发组件设计模型。针对这类系统特有的1/f噪声和FMAM变换噪声,设计了一种新颖的外差型94GHz和35GHzFWCW收发组件。线性调频带宽1000MHz,发射功率20~50mW,目标检测灵敏度-150dBc/Hz。该设计较常规的“零拍型”检测灵敏度改善20dB。对同等检测距离,可节省发射功率一个数量级以上。 展开更多
关键词 毫米波 调频连续波 收发组件 外差型
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毫米波FMCW收发组件技术研究
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作者 黄振起 何敏敏 +7 位作者 胡建凯 吴军民 秦洪桂 王勇 李宝令 冯委 孙微波 陶若燕 《微波学报》 CSCD 北大核心 1999年第3期213-220,共8页
本文提出毫米FMCW 收发组件的设计模型。针对这类系统特有的1/f 噪声和FMAM 变换噪声,设计了一种新颖的外差型94GHz 和35GHz FMCW 收发组件。线性调频带宽1000MHz,发射功率20~50m W,目标... 本文提出毫米FMCW 收发组件的设计模型。针对这类系统特有的1/f 噪声和FMAM 变换噪声,设计了一种新颖的外差型94GHz 和35GHz FMCW 收发组件。线性调频带宽1000MHz,发射功率20~50m W,目标检测灵敏度- 150dBc/Hz。该设计较常规的“零拍型”检测灵敏度改善20dB。对同等检测距离,可节省发射功率一个数量级以上。 展开更多
关键词 毫米波 调频连续波 收发组件 外差型 FMCW
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Preliminary analysis of the protein contents in Pinellia ternata with different types of leaves 被引量:2
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作者 温海霞 蔡家利 +4 位作者 张明 明兴加 刘日勇 唐偲雨 周卿瑞 《Journal of Chinese Pharmaceutical Sciences》 CAS 2009年第1期84-87,共4页
Total proteins extracted from Pinellia ternata with different types of leaves have been assayed by UV absorbance, blue native polyacrylamide gel electrophoresis (BN-PAGE) and sodium dodecyl sulfate-polyacrylamide ge... Total proteins extracted from Pinellia ternata with different types of leaves have been assayed by UV absorbance, blue native polyacrylamide gel electrophoresis (BN-PAGE) and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS- PAGE). We found that the total protein contents of P. ternata with the herbaceous peony and claw types of leaves were much higher than that with other types of leaves. P. ternata collected from Nanchuan County, except the ones with herbaceous peony leaves, displayed a high similarity with each other. Both UV absorbance and cluster analysis indicated that the protein content in P. ternata with the herbaceous peony leaves was less affected by habitats than that with other types of leaves. The results showed that it was necessary to increase the homogeneity of seeds for improving the protein content ofP. ternata. 展开更多
关键词 Pinellia ternata Leaf type PROTEIN VARIATION UV PAGE
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A variable differential consensus method for improving the quantitative near-infrared spectroscopic analysis 被引量:1
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作者 DU GuoRong CAI WenSheng SHAO XueGuang 《Science China Chemistry》 SCIE EI CAS 2012年第9期1946-1952,共7页
Consensus methods have presented promising tools for improving the reliability of quantitative models in near-infrared(NIR) spectroscopic analysis.A strategy for improving the performance of consensus methods in multi... Consensus methods have presented promising tools for improving the reliability of quantitative models in near-infrared(NIR) spectroscopic analysis.A strategy for improving the performance of consensus methods in multivariate calibration of NIR spectra is proposed.In the approach,a subset of non-collinear variables is generated using successive projections algorithm(SPA) for each variable in the reduced spectra by uninformative variables elimination(UVE).Then sub-models are built using the variable subsets and the calibration subsets determined by Monte Carlo(MC) re-sampling,and the sub-model that produces minimal error in cross validation is selected as a member model.With repetition of the MC re-sampling,a series of member models are built and a consensus model is achieved by averaging all the member models.Since member models are built with the best variable subset and the randomly selected calibration subset,both the quality and the diversity of the member models are insured for the consensus model.Two NIR spectral datasets of tobacco lamina are used to investigate the proposed method.The superiority of the method in both accuracy and reliability is demonstrated. 展开更多
关键词 near infrared spectroscopy multivariate calibration consensus model variable selection uninformative variable elim-ination successive projections algorithm
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