[Design and practice of instrumental analysis experiment： determination of borneol and camphor in <i>Chrysanthemum</i> by multiple headspace extraction-gas chromatography- mass spectrometry]. [PDF]
Se PuLi HX +5 more
europepmc +1 more source
[Effect of intraoperative hypothermia on short-term prognosis in neonatal necrotizing enterocolitis]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiRan Q, Wei H, Shi Y, Wang ZL.
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[Simultaneous determination of glycerol， acetic acid， and sodium bisulfite in compound amino acid injection （14AA） using ion exclusion chromatography]. [PDF]
Se PuGu YS, Zuo LM, Gao XL, Shan GZ, Zhao J.
europepmc +1 more source
, 2018 本发明提供了脉冲激光热疲劳实验时温度的闭环控制方法，先预设一个试样实验时的目标温度值，再获取试样表面在一定时间段内的温度值；计算出该时间段内的实时平均温度值、最高温度和最低温度、实时温度震荡值；然后利用预设的目标温度平均值和目标温度震荡值分别与实时温度平均值和实时温度震荡值进行偏差计算，将偏差结果代入BP神经网络PID控制模块，经过计算后得到实时工作参数；最后根据实时工作参数去调整下一时间段脉冲激光的工作状态；重复前述步骤，直至当前试样表面的实际温度值符合目标温度值的要求 ...
郑彩云 +5 more
core
[Simultaneous determination of five common pyrethroid metabolites in urine using liquid-liquid extraction coupled with ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuZhang XM, Meng XJ, Hu Y, Liu XD.
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, 2010 【目的】为了解新疆北部地区冬季不同土壤深度的温度和冬前灌溉与未灌溉条件下土壤水势的动态变化。【方法】采取温度和水势自动化数据采集系统对该地区土壤进行监测。【结果】2002年11月~2003年2月,随着土壤深度增加,月均土壤温度增加,2003年3月以后,随着空气温度上升,表层土壤升温相对比较快,土壤深层的温度小于表层温度,3月40 cm土壤温度比0 cm低1.3℃。1~2月土壤温度的变异性为0.9%~7.74%,3~4月的温度变异性增大,变异范围为8.61%~35.14%;随着土壤深度增加 ...
吕昭智, 张江国, 王佩玲
core
[Value assignment technology for 1，3-oleic-2-palmitic triglyceride purity reference material]. [PDF]
Se PuWang XY +6 more
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[Association between periconception maternal cold and heat exposure and the risk of congenital heart disease in offspring in China]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanXu H +10 more
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[Preparation of chiral micro-packed high performance liquid chromatography column with small-size silica gel coated with amylose tris（3，5-dimethylphenylcarbamate）]. [PDF]
Se PuZhang CG +5 more
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