A 2 nd transconductance subharmonic receiver for 245 GHz spectroscopy sensor applications has been proposed. The receiver consists of a 245 GHz on-chip folded dipole antenna, a CB（common base） LNA, a 2 nd transcondu...A 2 nd transconductance subharmonic receiver for 245 GHz spectroscopy sensor applications has been proposed. The receiver consists of a 245 GHz on-chip folded dipole antenna, a CB（common base） LNA, a 2 nd transconductance SHM（subharmonic mixer）, and a 120 GHz push-push VCO with 1/64 divider. The receiver is fabricated in f;/f;= 300/500 GHz SiGe:C BiCMOS technology. The receiver dissipates a low power of 288 mW.Integrated with the on-chip antenna, the receiver is measured on-chip with a conversion gain of 15 dB, a bandwidth of 15 GHz, and the chip will be utilized in PCB board design for gas spectroscopy sensor application.展开更多
为了优化桑葚露酒制备工艺条件,以新鲜桑葚为主要原料,经浸泡工艺制得桑葚露酒,应用模糊综合评判模型从外观、香气、滋味和风格四个方面评价露酒成品。结果表明:桑葚露酒最佳浸提条件为料液比1∶1.5、酒精度45%(体积分数,下同)、蔗糖添...为了优化桑葚露酒制备工艺条件,以新鲜桑葚为主要原料,经浸泡工艺制得桑葚露酒,应用模糊综合评判模型从外观、香气、滋味和风格四个方面评价露酒成品。结果表明:桑葚露酒最佳浸提条件为料液比1∶1.5、酒精度45%(体积分数,下同)、蔗糖添加量15%(表示每100 m L溶液添加蔗糖15 g,下同)。利用气相色谱质谱联用仪分析最优工艺制得的桑葚露酒,其挥发性香气成分中相对含量最高为乙醇、己酸乙酯、苯乙酸和棕榈酸乙酯,表明这些化合物在桑葚露酒典型性香气形成中起着非常重要的作用。展开更多
首次应用逐个单因素分析法区分大豆油,菜子油(低芥酸菜子油,高芥酸菜子油),棉籽油以及工业油酸等几种油脂原料。文中采用气相色谱-质谱法分析了四大类油脂,用面积归一化法计算每个样品中各脂肪酸的相对含量。以检测到的九种脂肪酸的相...首次应用逐个单因素分析法区分大豆油,菜子油(低芥酸菜子油,高芥酸菜子油),棉籽油以及工业油酸等几种油脂原料。文中采用气相色谱-质谱法分析了四大类油脂,用面积归一化法计算每个样品中各脂肪酸的相对含量。以检测到的九种脂肪酸的相对含量为变量,对采集的85个数据使用R version 2.8.1建立了相应的数学模型。由该判别法将样品成功的分为四大类;其中特别还将高芥酸菜子油和低芥酸菜子油区分开来了。逐个单因素法能较好的实现样品的判别,自身验证的准确率为100%。另取22个油脂样品进行验证,识别准确率为100%。展开更多
基金Project supported by the Zhejiang National Natural Science Foundation of China(No.LQ17F040001)the Key Laboratory Open Project Fund of Southeast University,China(No.K201817)
文摘A 2 nd transconductance subharmonic receiver for 245 GHz spectroscopy sensor applications has been proposed. The receiver consists of a 245 GHz on-chip folded dipole antenna, a CB（common base） LNA, a 2 nd transconductance SHM（subharmonic mixer）, and a 120 GHz push-push VCO with 1/64 divider. The receiver is fabricated in f;/f;= 300/500 GHz SiGe:C BiCMOS technology. The receiver dissipates a low power of 288 mW.Integrated with the on-chip antenna, the receiver is measured on-chip with a conversion gain of 15 dB, a bandwidth of 15 GHz, and the chip will be utilized in PCB board design for gas spectroscopy sensor application.
文摘为了优化桑葚露酒制备工艺条件,以新鲜桑葚为主要原料,经浸泡工艺制得桑葚露酒,应用模糊综合评判模型从外观、香气、滋味和风格四个方面评价露酒成品。结果表明:桑葚露酒最佳浸提条件为料液比1∶1.5、酒精度45%(体积分数,下同)、蔗糖添加量15%(表示每100 m L溶液添加蔗糖15 g,下同)。利用气相色谱质谱联用仪分析最优工艺制得的桑葚露酒,其挥发性香气成分中相对含量最高为乙醇、己酸乙酯、苯乙酸和棕榈酸乙酯,表明这些化合物在桑葚露酒典型性香气形成中起着非常重要的作用。
文摘首次应用逐个单因素分析法区分大豆油,菜子油(低芥酸菜子油,高芥酸菜子油),棉籽油以及工业油酸等几种油脂原料。文中采用气相色谱-质谱法分析了四大类油脂,用面积归一化法计算每个样品中各脂肪酸的相对含量。以检测到的九种脂肪酸的相对含量为变量,对采集的85个数据使用R version 2.8.1建立了相应的数学模型。由该判别法将样品成功的分为四大类;其中特别还将高芥酸菜子油和低芥酸菜子油区分开来了。逐个单因素法能较好的实现样品的判别,自身验证的准确率为100%。另取22个油脂样品进行验证,识别准确率为100%。
