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LightCycler FQ-PCR检测HBV-DNA时CT值基线调节 被引量:1
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作者 崔小平 罗德生 《吉林医学》 CAS 2005年第6期663-663,共1页
关键词 全自动荧光定量PCR仪 HBV-DNA 基线调节
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高计数率下的四路反堆积放大电路 被引量:1
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作者 董成富 苏弘 +3 位作者 千奕 李小刚 马晓莉 吴鸣 《核电子学与探测技术》 CAS CSCD 北大核心 2009年第1期214-217,共4页
介绍一种在高计数率情况下的反堆积放大器,它允许通过的平均计数为105/s。该放大器为了适应高计数率的要求,设计了基线调节功能和反堆积功能,给出了堆积标志,以便后继电路的处理。该电路在一个单宽NIM插件中有完全相同的四路电路工作,... 介绍一种在高计数率情况下的反堆积放大器,它允许通过的平均计数为105/s。该放大器为了适应高计数率的要求,设计了基线调节功能和反堆积功能,给出了堆积标志,以便后继电路的处理。该电路在一个单宽NIM插件中有完全相同的四路电路工作,结构紧凑,体积小,工作性能稳定。 展开更多
关键词 放大器 准高斯 成形 反堆积 基线调节
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小型球类容器弧面焊缝超声探伤中的仪器扫描基线的调节
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作者 陈广昭 余剑智 丁志然 《无损探伤》 1995年第4期16-18,22,共4页
介绍采用角度修正办法调节仪器扫描基线,对小直径容器圆弧面焊缝的缺陷的弧长和径向深度的简易定位法。包括修正系数的确定,仪器调节和探测实例。
关键词 焊缝 超声检验 探伤 容器 扫描基线调节
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Tobacco Production Baseline Survey in Serengeti, Tarime and Rorya Districts, Mara Region
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作者 Nicholaus Musimu Kuboja Asheri Mwamba Kalala +1 位作者 Jacob Bulenga Lisuma Mariam Mrutu 《Journal of Agricultural Science and Technology(B)》 2012年第4期471-481,共11页
Using 2009/2010 cropping season survey data from 181 randomly selected smallholder tobacco farmers, this study provides baseline information on tobacco farming in Mara region. Both descriptive and inferential statisti... Using 2009/2010 cropping season survey data from 181 randomly selected smallholder tobacco farmers, this study provides baseline information on tobacco farming in Mara region. Both descriptive and inferential statistics were employed in data analysis. Result indicates that farmers adopted tobacco farming from tobacco farmers in Kenya. Drought and inadequate supply of inputs were identified as the major production constraints. Others were incidence of pests and diseases, shortage of fire woods, poor extension services and hailstones. Low selling price and contradicting grading systems were the major tobacco marketing constraints. The study also revealed that access to extension services was similar across study districts with over 65.7% of the respondents accessing technical expertise mainly from Alliance One Tanzania employees. Given the positive and negative impacts of tobacco farming, majority of the respondents (95.6%) still were willing to proceed with tobacco farming as their main source of income. However, watermelon, maize and sunflower were ranked as first priority alternative cash crops to tobacco in Serengeti, Tarime and Rorya districts, respectively. This study concludes that tobacco farming still is the main household income source; hence, more investment is required to ensure sustainable economic develooment of rural communities in Mara reeion. 展开更多
关键词 BASELINE MARKETING production tobacco.
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