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对快起动节流制冷器和集成式斯特林制冷机的最低制冷温度、制冷功率、起动时间、热负荷、控温转速和控温功率等进行了工程化研究,有效地解决了关键技术问题,减少热力损失、振动噪声和污染,提高密封性和装配技术水平等。还解决了制冷机的可靠性,寿命和存贮期等实用化问题。 相似文献
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高效液相色谱法测定糖脂双降茶中淫羊藿甙的含量 总被引:4,自引:0,他引:4
建立了高效液相色谱法测定糖脂双降茶中淫羊藿甙含量的方法。采用ODS柱 ,以甲醇 水 (体积比为 60∶4 0 )为流动相 ,用紫外检测器于 2 70nm处检测。结果表明 ,淫羊藿甙的质量浓度在 0 1g/L~ 0 5 g/L范围内与色谱峰的峰面积呈良好的线性关系 (r =0 9993 ) ,回收率为 10 1 0 %~ 10 1 7% ,RSD为 1 6%~ 2 7% (n =3 )。方法快速、简便、准确 ,结果稳定 ,重现性好 ,可推荐其作为质量检验的一个定量方法。 相似文献
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Enhancement in solar hydrogen generation efficiency using InGaN photoelectrode after surface roughening treatment with nano-sized Ni mask
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A significant enhancement in solar hydrogen generation efficiency has been achieved by inductive coupled etching (ICP) surface roughening treatment using nano-sized nickel mask. As much as 7 times improvement of photocurrent is demonstrated in comparison with a planar one fabricated from the same parent wafer. Under identical illumination conditions in HBr solution, the incident photon conversion efficiency (IPCE) shows an enhancement with a factor of 3, which even exceed 54% at 400 nm wavelength. We believe the enhancement is attributed to several facts including improvement in absorption, reacting area, carder localization and carrier lifetime. 相似文献