通过利用液压机构各模块高压油泄漏后必将经过回油孔流入到低压油箱的特点,设计监测工装,监测各模块回油孔油位的变化,从而直观快速诊断出内部泄漏的模块,予以针对性的清除。文中通过一起液压机构泄漏故障的诊断验证了此方法的正确与有效性,提高了检修的准确性与效率,为液压机构内部泄漏故障的诊断提供新的思路。
王峰 +7 more
doaj
本文介绍自制氧化铝微柱提取样品,改良洗脱条件与流动相配比,用高效液相色谱分离及电化学检测器(HPLC-ECD)分析尿儿茶酚胺。去甲肾上腺素、肾上腺素、多巴胺的回收率分别为91.2%、80.7%和110.9%,线性范围3.3~3333μmol/L,批内和批间变异系数均<5%。此法简便、经济、快速、特异性强、回收率高,便于临床和实验室推广应用。
doaj
[Rapid determination of venetoclax in plasma by ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]
Zhu Y, Ma XL, Yu SL, Qiu L.
europepmc +1 more source
针对全钒液流电池(VFB)储能系统在传统恒功率充放电控制下存在的初始电流冲击大和能量利用率低等问题,文中提出一种基于功率自适应的充放电控制策略。该策略通过自适应功率调节机制,动态优化充放电功率轨迹:在充放电初期有效抑制电流冲击,延长电池寿命;在末期则动态调节功率变化速率,使端电压逼近截止电压,拓宽荷电状态(SOC)可用区间,实现深度充放电,避免因触及电压限制而降低利用率。为全面反映电池运行特性,建立了涵盖电气、电化学、流体力学及温度场的VFB多物理场耦合模型,并给出了功率自适应控制策略的控制框图和算法 ...
张红 +5 more
doaj
[Determination of vitamin A and vitamin E in human tear by liquid chromatography-tandem mass spectrometry and analysis of their relationship with dry eye]. [PDF]
Luo BB, Jiao JR, Bai J, Liu XY.
europepmc +1 more source
[Research progress on the application of ultrasound technology in the diagnosis and treatment of lymphedema]. [PDF]
Tang ZY, Liu R, Deng CL.
europepmc +1 more source
[Determination of ethylene oxide and acetaldehyde in petrochemical exhaust based on thermal desorption- gas chromatography-mass spectrometry]. [PDF]
Li YJ.
europepmc +1 more source
[Determination of tetracyclines in animal muscle tissues by ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]
Chu K +5 more
europepmc +1 more source
[Dihydroartemisinin inhibits the progression of oral squamous cell carcinoma]. [PDF]
Shan T +5 more
europepmc +1 more source
[Performance validation and consistency assessment of three liquid chromatography-tandem mass spectrometry methods for detecting fat-soluble vitamins]. [PDF]
Li BC +8 more
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