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汽车试验场高速环道Mcconnell曲线路基成型技术
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作者 乔匡义 《公路交通科技(应用技术版)》 CSCD 北大核心 2016年第4期132-133,共2页
汽车试验场高速环道Mcconnell曲线是一种空间三维渐变曲线,其路基横断面为二次(或三次)抛物线形式,在平、纵、横三个方向依次渐变而成,使路基形成一种特殊的"盆腔结构"。由于它形态特殊,行车时车道受力方向与水平车道有别,环... 汽车试验场高速环道Mcconnell曲线是一种空间三维渐变曲线,其路基横断面为二次(或三次)抛物线形式,在平、纵、横三个方向依次渐变而成,使路基形成一种特殊的"盆腔结构"。由于它形态特殊,行车时车道受力方向与水平车道有别,环道路基的不同性质填筑层,是以曲面法向分层,以水平法逐层填筑曲面时,在同一水填筑层上,就会有多种填料。本文结合工程实践,论述这种特殊线形路基的成型技术,供同类工程参考。 展开更多
关键词 高速环道 mcconnell曲线 成型技术 3D
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Massive Pulmonary Embolism in Recovery Period of General Anesthesia: Rapid Diagnosis and Successful Rescue by the Guidance of Transthoracic Echocardiography 被引量:7
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作者 Mao Xu Cheng-Mei Shi +2 位作者 Jiao Li Jun Wang Xiang-Yang Guo 《Chinese Medical Journal》 SCIE CAS CSCD 2017年第2期245-246,共2页
Massive pulmonary embolism (PE), an uncommon event in the perioperative period, is a major challenge to anesthesia management. Massive PE is often associated with an unexpected hemodynamic collapse and severe desatu... Massive pulmonary embolism (PE), an uncommon event in the perioperative period, is a major challenge to anesthesia management. Massive PE is often associated with an unexpected hemodynamic collapse and severe desaturation without other characteristic changes. It is difficult to make a rapid diagnosis during the perioperative period, especially under general anesthesia. We present a rare case of massive PE diagnosed with transthoracic echocardiography (TTE) in the recovery period of general anesthesia. 展开更多
关键词 DIAGNOSIS Massive Pulmonary Embolism mcconnell Sign THROMBOLYSIS Transthoracic Echocardiography
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