A method of on\|line ultrasensitive chemiluminescence detection with capillary electrophoresis for Co(Ⅱ) is reported. Using our newly developed capillary electrophoresis with chemiluminescence detection system and no...A method of on\|line ultrasensitive chemiluminescence detection with capillary electrophoresis for Co(Ⅱ) is reported. Using our newly developed capillary electrophoresis with chemiluminescence detection system and novel mixing mode of the reagents, the effects of field\|amplified sample injection on detection limits of metal ions were studied in detail. The sub\|fmol/L level(0.13 fmol/L, 1.6 ymol) detection of cobalt ions in ultradilute solution was performed. The separation of fmol/L level Co(Ⅱ) and trace amounts of Ni(Ⅱ) was performed successfully.展开更多
研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动...研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动补偿、颜色空间转换的硬件IP核优化设计与实现,构建基于Nios II软核软硬件协同设计的视频解码系统。以Altera型号EP2C35F672C8的FPGA为核心的SOPC系统测试结果表明,该系统在运行频率仅为100MHz下,测试码流的码率为1 593.90kb/s时,帧率可以达到35.20f/s,实现了MPEG-4的实时解码,从而使该SOPC软硬件协同设计实现了播放器的低功耗等高性能。展开更多
文摘A method of on\|line ultrasensitive chemiluminescence detection with capillary electrophoresis for Co(Ⅱ) is reported. Using our newly developed capillary electrophoresis with chemiluminescence detection system and novel mixing mode of the reagents, the effects of field\|amplified sample injection on detection limits of metal ions were studied in detail. The sub\|fmol/L level(0.13 fmol/L, 1.6 ymol) detection of cobalt ions in ultradilute solution was performed. The separation of fmol/L level Co(Ⅱ) and trace amounts of Ni(Ⅱ) was performed successfully.
文摘研究了基于嵌入式Nios Ⅱ软核的MPEG-4视频解码系统的设计优化,以期提高便携式多媒体播放器视频解码的综合性能。提出了在可编程片上系统(System on a programmable chip,SOPC)中软硬件协同设计方案,通过研究二维离散余弦逆变换、运动补偿、颜色空间转换的硬件IP核优化设计与实现,构建基于Nios II软核软硬件协同设计的视频解码系统。以Altera型号EP2C35F672C8的FPGA为核心的SOPC系统测试结果表明,该系统在运行频率仅为100MHz下,测试码流的码率为1 593.90kb/s时,帧率可以达到35.20f/s,实现了MPEG-4的实时解码,从而使该SOPC软硬件协同设计实现了播放器的低功耗等高性能。
