This investigation describes that GPC was used to separate effectively 3, 6 -dichloro -pyridine-2-carboxylic acid, from3, 5,6-trichloro -4-cyano-pyridine -2 -carboxylic , 2-cyano- pyridine and tetrachloro -2- cyano -p...This investigation describes that GPC was used to separate effectively 3, 6 -dichloro -pyridine-2-carboxylic acid, from3, 5,6-trichloro -4-cyano-pyridine -2 -carboxylic , 2-cyano- pyridine and tetrachloro -2- cyano -pyridine , the peak purity of 3, 6 -dichloro -phridine -2 -carboxylic acid was identified by " purity augle " theory.展开更多
Electronic spectroscopy of chemical analysis(ESCA)was used to study the surface composing of flu polymer F 2314 .The structure and composing of the copolymer was investigated according to each of the ClS spectra.Furth...Electronic spectroscopy of chemical analysis(ESCA)was used to study the surface composing of flu polymer F 2314 .The structure and composing of the copolymer was investigated according to each of the ClS spectra.Furthermore,the possible chain link mode was estimated.Comparing the spectra of undissolved part with F 2314 copolymer,there are some differences between the compose,but the chain link mode remains the same.The results of the experiment indicated that the increase of the proportion of CTFE in undissolved sample affected the solubility of F 2314 copolymer in different batches.展开更多
为提高磁力仪的性能,给出了自主研发的JOM-1型Overhauser磁力仪的工作原理及系统硬件构成,主要介绍了射频激励电路、信号调理电路、工作时序、仪器的噪声水平及实验结果。野外测试表明该仪器实现了数据采集、显示、存储和查看等基本功能...为提高磁力仪的性能,给出了自主研发的JOM-1型Overhauser磁力仪的工作原理及系统硬件构成,主要介绍了射频激励电路、信号调理电路、工作时序、仪器的噪声水平及实验结果。野外测试表明该仪器实现了数据采集、显示、存储和查看等基本功能,信号的初始信噪比为96∶1,约为自主研发的JPM-1型普通质子旋进磁力仪的3倍,灵敏度可达0.14 n T。展开更多
为提高传统质子磁力仪综合性能,同时为研制Overhauser磁力仪提供参考依据,设计了基于数字信号处理器(DSP:Digital Signal Processor)TMS320F2812研制的JPM-1型质子磁力仪。该磁力仪以DSP为核心实现质子旋进信号的采集和处理,采用基于DS...为提高传统质子磁力仪综合性能,同时为研制Overhauser磁力仪提供参考依据,设计了基于数字信号处理器(DSP:Digital Signal Processor)TMS320F2812研制的JPM-1型质子磁力仪。该磁力仪以DSP为核心实现质子旋进信号的采集和处理,采用基于DSP的软件过零数频算法计算旋进信号频率。分析了探头初始信号强度,并通过建立仪器噪声模型分析了仪器噪声。野外测试结果表明,该磁力仪探头信号初始幅度约为0.4μV,初始信噪比为32∶1,灵敏度为0.27 nT。展开更多
文摘This investigation describes that GPC was used to separate effectively 3, 6 -dichloro -pyridine-2-carboxylic acid, from3, 5,6-trichloro -4-cyano-pyridine -2 -carboxylic , 2-cyano- pyridine and tetrachloro -2- cyano -pyridine , the peak purity of 3, 6 -dichloro -phridine -2 -carboxylic acid was identified by " purity augle " theory.
文摘Electronic spectroscopy of chemical analysis(ESCA)was used to study the surface composing of flu polymer F 2314 .The structure and composing of the copolymer was investigated according to each of the ClS spectra.Furthermore,the possible chain link mode was estimated.Comparing the spectra of undissolved part with F 2314 copolymer,there are some differences between the compose,but the chain link mode remains the same.The results of the experiment indicated that the increase of the proportion of CTFE in undissolved sample affected the solubility of F 2314 copolymer in different batches.
文摘为提高磁力仪的性能,给出了自主研发的JOM-1型Overhauser磁力仪的工作原理及系统硬件构成,主要介绍了射频激励电路、信号调理电路、工作时序、仪器的噪声水平及实验结果。野外测试表明该仪器实现了数据采集、显示、存储和查看等基本功能,信号的初始信噪比为96∶1,约为自主研发的JPM-1型普通质子旋进磁力仪的3倍,灵敏度可达0.14 n T。
文摘为提高传统质子磁力仪综合性能,同时为研制Overhauser磁力仪提供参考依据,设计了基于数字信号处理器(DSP:Digital Signal Processor)TMS320F2812研制的JPM-1型质子磁力仪。该磁力仪以DSP为核心实现质子旋进信号的采集和处理,采用基于DSP的软件过零数频算法计算旋进信号频率。分析了探头初始信号强度,并通过建立仪器噪声模型分析了仪器噪声。野外测试结果表明,该磁力仪探头信号初始幅度约为0.4μV,初始信噪比为32∶1,灵敏度为0.27 nT。
