In order to solve emitter recognition problems in a practical reconnaissance environment, attribute mathematics is introduced. The basic concepts and theory of attribute set and attribute measure are described i n det...In order to solve emitter recognition problems in a practical reconnaissance environment, attribute mathematics is introduced. The basic concepts and theory of attribute set and attribute measure are described i n detail. A new attribute recognition method based on attribute measure is prese nted in this paper. Application example is given, which demonstrates this new me thod is accurate and effective. Moreover, computer simulation for recognizing th e emitter purpose is selected, and compared with classical statistical pattern r ecognition through simulation. The excellent experimental results demonstrate t hat this is a brand-new attribute recognition method as compared to existing st atistical pattern recognition techniques.展开更多
一、问题的提出 ISO等7个国际组织1993年联合公布,于1995年修订后,至今未再修订的《Guide to the Expression of Uncertainty in Measurement》(《GUM》)正文中未提到方法不确定度问题。但在其附录F.Z:标准不确定度的B类评定, 作为这一...一、问题的提出 ISO等7个国际组织1993年联合公布,于1995年修订后,至今未再修订的《Guide to the Expression of Uncertainty in Measurement》(《GUM》)正文中未提到方法不确定度问题。但在其附录F.Z:标准不确定度的B类评定, 作为这一节的第5个问题,并在F2.5中,以测量方法不确定度作为标题(Uneertainty of the method of measurement) 进行了讨论。其中还涉及到了E4.4节。对于《GUM》修订后的全文汉译,读者可参见中国计量出版社2001年出版的《测量不确定度表达百问》(151-306页)。首先,《GUM》把测量方法的不确定度定义为与方法有关的、输出量Y估计值y的合成标准不确定度uc(y)的一个分量。为讨论方便,本文暂且给予一个备用符号Umd (y)。展开更多
High performance liquid chromatography was coupled with UV detection for simultaneous quantification of lopinavir （LPV） and ritonavir （RTV） in human plasma. This assay was sensitive, accurate and simple, and only ...High performance liquid chromatography was coupled with UV detection for simultaneous quantification of lopinavir （LPV） and ritonavir （RTV） in human plasma. This assay was sensitive, accurate and simple, and only used 200μL of plasma sample. Samples were liquid-liquid extracted, and diazepam was used as an internal standard. The chromatographic separation was achieved on a C18 reversed-phase analytic column with a mobile phase of acetonitrile-sodium dihydrogen phosphate buffer （10 mmol L-1, pH 4.80） （60：40, v/v）. UV detection was conducted at 205 nm and the column oven was set at 40℃. Calibration curves were constructed between 0,5-20 μg mL-1 for LPV and 0.05-5 μg mL-1 for RTV. The relative standard deviations were 2.16%-3.20% for LPV and 2.12%-2.60% for RTV for intra-day analysis, and 2.34%-4.04% for LPV and 0.31%-4.94% for RTV for inter-day analysis. The accuracy was within 100%＋10%. The mean extraction recoveries were 79.17%, 52.26% and 91.35% for RTV, LPV and diazepam, respectively. This method was successfully applied to human plasma samples from patients orally administered a salvage regimen of lopinavir-ritonavir tablets.展开更多
We describe a fiber optic hydrophone array system that could be used for underwater acoustic surveillance applications （e.g. military, counter terrorist, and customs authorities in protecting ports and harbors）, off...We describe a fiber optic hydrophone array system that could be used for underwater acoustic surveillance applications （e.g. military, counter terrorist, and customs authorities in protecting ports and harbors）, offshore production facilities or coastal approaches as well as various marine applications. In this paper, we propose a new approach to underwater sonar systems using the voltage-controlled liquid crystals and simple multiplexing method. The proposed method permits measurement of sound under water at multiple points along an optical fiber using the low cost components and standard single mode fiber, without complex interferometric measurement techniques, electronics or demodulation software.展开更多
文摘In order to solve emitter recognition problems in a practical reconnaissance environment, attribute mathematics is introduced. The basic concepts and theory of attribute set and attribute measure are described i n detail. A new attribute recognition method based on attribute measure is prese nted in this paper. Application example is given, which demonstrates this new me thod is accurate and effective. Moreover, computer simulation for recognizing th e emitter purpose is selected, and compared with classical statistical pattern r ecognition through simulation. The excellent experimental results demonstrate t hat this is a brand-new attribute recognition method as compared to existing st atistical pattern recognition techniques.
文摘一、问题的提出 ISO等7个国际组织1993年联合公布,于1995年修订后,至今未再修订的《Guide to the Expression of Uncertainty in Measurement》(《GUM》)正文中未提到方法不确定度问题。但在其附录F.Z:标准不确定度的B类评定, 作为这一节的第5个问题,并在F2.5中,以测量方法不确定度作为标题(Uneertainty of the method of measurement) 进行了讨论。其中还涉及到了E4.4节。对于《GUM》修订后的全文汉译,读者可参见中国计量出版社2001年出版的《测量不确定度表达百问》(151-306页)。首先,《GUM》把测量方法的不确定度定义为与方法有关的、输出量Y估计值y的合成标准不确定度uc(y)的一个分量。为讨论方便,本文暂且给予一个备用符号Umd (y)。
基金supported by the National Key Technologies R&D Program for the 11th Five-year Plan (Grant No. 2008ZX10001-006)the Key Clinical Program of the Ministry of Health 2010-2012
文摘High performance liquid chromatography was coupled with UV detection for simultaneous quantification of lopinavir （LPV） and ritonavir （RTV） in human plasma. This assay was sensitive, accurate and simple, and only used 200μL of plasma sample. Samples were liquid-liquid extracted, and diazepam was used as an internal standard. The chromatographic separation was achieved on a C18 reversed-phase analytic column with a mobile phase of acetonitrile-sodium dihydrogen phosphate buffer （10 mmol L-1, pH 4.80） （60：40, v/v）. UV detection was conducted at 205 nm and the column oven was set at 40℃. Calibration curves were constructed between 0,5-20 μg mL-1 for LPV and 0.05-5 μg mL-1 for RTV. The relative standard deviations were 2.16%-3.20% for LPV and 2.12%-2.60% for RTV for intra-day analysis, and 2.34%-4.04% for LPV and 0.31%-4.94% for RTV for inter-day analysis. The accuracy was within 100%＋10%. The mean extraction recoveries were 79.17%, 52.26% and 91.35% for RTV, LPV and diazepam, respectively. This method was successfully applied to human plasma samples from patients orally administered a salvage regimen of lopinavir-ritonavir tablets.
文摘We describe a fiber optic hydrophone array system that could be used for underwater acoustic surveillance applications （e.g. military, counter terrorist, and customs authorities in protecting ports and harbors）, offshore production facilities or coastal approaches as well as various marine applications. In this paper, we propose a new approach to underwater sonar systems using the voltage-controlled liquid crystals and simple multiplexing method. The proposed method permits measurement of sound under water at multiple points along an optical fiber using the low cost components and standard single mode fiber, without complex interferometric measurement techniques, electronics or demodulation software.
