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FPSO工艺水舱阳极快速消耗原因分析 被引量:6
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作者 廖宏越 蔡德纯 +4 位作者 蒋满军 王琦 陈亚林 张伟 杨朝晖 《装备环境工程》 CAS 2019年第4期132-135,共4页
目的研究FPSO工艺水舱中铝牺牲阳极消耗过快的原因。方法参照GB 17848—1999牺牲阳极电化学性能试验方法,对比水舱环境与普通环境下,在役阳极的电化学性能数据,并模拟水舱环境,监测阳极工作时实际的发生电流与工作电位等情况,据此分析... 目的研究FPSO工艺水舱中铝牺牲阳极消耗过快的原因。方法参照GB 17848—1999牺牲阳极电化学性能试验方法,对比水舱环境与普通环境下,在役阳极的电化学性能数据,并模拟水舱环境,监测阳极工作时实际的发生电流与工作电位等情况,据此分析牺牲阳极在工艺水舱中消耗过快的原因。结果在常温(25℃)、常温充空气、高温(65℃)充空气等条件下,阳极的电化学容量分别是2522.07、2464.29、1943.74Ah/kg,且高温(65℃)充空气环境下阳极的晶间腐蚀较其他两组试验严重许多,说明温度是影响阳极电化学容量的关键因素。在模拟工艺水舱环境下,实测的阳极发生电流最高可达100m A。将工艺水与海水1:5稀释后,实测的保护电流密度最高达45m A,说明工艺水中存在大量的去极化剂,是造成阳极快速消耗的又一重要因素。结论工艺水舱环境下,阳极发生严重的晶间腐蚀,严重影响了阳极的电化学容量,使阳极寿命缩短。工艺水成分中含大量去极化剂,使船舱所需的保护电流密度大大增加,促使阳极发生电流加大,亦缩短了阳极的实际服役寿命。 展开更多
关键词 工艺水舱 牺牲阳极 快速消耗 去极化剂
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Altered Brain Regional Homogeneity Following Contralateral Acupuncture at Quchi (LI 11) and Zusanli (ST 36) in Ischemic Stroke Patients with Left Hemiplegia: An fMRI Study 被引量:40
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作者 CHEN Shu-qi cai de-chun +2 位作者 CHEN Ji-xin YANG Han LIU Lian-sheng 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2020年第1期20-25,共6页
Objective: To study the effect of contralateral acupuncture(CAT) at acupoints of Quchi(LI 11) and Zusanli(ST 36) on the unaffected limbs of ischemic stroke patients with left hemiplegia based on regional homogeneity(R... Objective: To study the effect of contralateral acupuncture(CAT) at acupoints of Quchi(LI 11) and Zusanli(ST 36) on the unaffected limbs of ischemic stroke patients with left hemiplegia based on regional homogeneity(ReHo) indices. Methods: Ten ischemic stroke patients with left hemiplegia received CAT on right side at LI 11 and ST 36. Functional magnetic resonance imaging(fMRI) was performed before and after acupuncture. A ReHo analytical method was used to compare brain responses of patients before and after CAT operated by REST software. Results: The stimulation at both LI 11 and ST 36 on the unaffected limbs produced significantly different neural activities. CAT elicited increased ReHo values at the right precentral gyrus and superior frontal gyrus, decreased ReHo value at right superior parietal lobule, left fusiform gyrus and left supplementary motor area. Conclusions: Acupuncture at one side could stimulate bilateral regions. CAT could evoke the gyrus which was possibly related to motor recovery from stroke. A promising indicator of neurobiological deficiencies could be represented by ReHo values in post-stroke patients. 展开更多
关键词 contralateral acupuncture ischemic stroke functional magnetic resonance imaging regional homogeneity
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