本文针对深圳变电站超规模扩建第三台联络变压器的500 k V进线方案,分别采用交联聚乙烯(XLPE)电缆和气体绝缘管道母线(GIB)进行技术经济比较。GIB较XLPE电缆具有工艺成熟、性能优越、安全可靠的技术优势,同时在全寿命周期来看经济可行...本文针对深圳变电站超规模扩建第三台联络变压器的500 k V进线方案,分别采用交联聚乙烯(XLPE)电缆和气体绝缘管道母线(GIB)进行技术经济比较。GIB较XLPE电缆具有工艺成熟、性能优越、安全可靠的技术优势,同时在全寿命周期来看经济可行。深圳站第三台联络变压器进线最终采用750单相米的500 k VGIB架空敷设,敷设路径包括屋面、围墙、道路以及狭窄区域。通过技术参数、方案设计、地基处理三方面总结工程经验,为GIB在空间紧张、布置困难的变电工程中应用提供参考。展开更多
Cameron lesions represent linear gastric erosions and ulcers on the crests of mucosal folds in the distal neck of a hiatal hernia(HH).Such lesions may be found in upto 50% of endoscopies performed for another indicati...Cameron lesions represent linear gastric erosions and ulcers on the crests of mucosal folds in the distal neck of a hiatal hernia(HH).Such lesions may be found in upto 50% of endoscopies performed for another indication.Though typically asymptomatic,these may rarely present as acute,severe upper gastrointestinal bleed(GIB).The aim is to report a case of a non-anemic 87-year-old female with history of HH and atrial fibrillation who presented with hematemesis and melena resulting in hypovolemic shock.Repeat esophagogastroduodenoscopy was required to identify multiple Cameron ulcers as the source.Endoscopy in a patient with HH should involve meticulous visualization of hernia neck and surrounding mucosa.Cameron ulcers should be considered in all patients with severe,acute GIB and especially in those with known HH with or without chronic anemia.展开更多
文摘本文针对深圳变电站超规模扩建第三台联络变压器的500 k V进线方案,分别采用交联聚乙烯(XLPE)电缆和气体绝缘管道母线(GIB)进行技术经济比较。GIB较XLPE电缆具有工艺成熟、性能优越、安全可靠的技术优势,同时在全寿命周期来看经济可行。深圳站第三台联络变压器进线最终采用750单相米的500 k VGIB架空敷设,敷设路径包括屋面、围墙、道路以及狭窄区域。通过技术参数、方案设计、地基处理三方面总结工程经验,为GIB在空间紧张、布置困难的变电工程中应用提供参考。
文摘Cameron lesions represent linear gastric erosions and ulcers on the crests of mucosal folds in the distal neck of a hiatal hernia(HH).Such lesions may be found in upto 50% of endoscopies performed for another indication.Though typically asymptomatic,these may rarely present as acute,severe upper gastrointestinal bleed(GIB).The aim is to report a case of a non-anemic 87-year-old female with history of HH and atrial fibrillation who presented with hematemesis and melena resulting in hypovolemic shock.Repeat esophagogastroduodenoscopy was required to identify multiple Cameron ulcers as the source.Endoscopy in a patient with HH should involve meticulous visualization of hernia neck and surrounding mucosa.Cameron ulcers should be considered in all patients with severe,acute GIB and especially in those with known HH with or without chronic anemia.
