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宽含水率域桦木应力松弛时温等效研究 被引量:1
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作者 戎建杰 姜志宏 《林产工业》 北大核心 2020年第12期1-7,共7页
低温低湿环境下,木材仍会发生缓慢的应力松弛。温度是影响木材应力松弛的重要因素,而时温等效是预测长期应力松弛的有效方法。在试验基础上,探索时温等效对于木材应力松弛研究的适用性。用动态热机械分析仪进行短期应力松弛试验,获得桦... 低温低湿环境下,木材仍会发生缓慢的应力松弛。温度是影响木材应力松弛的重要因素,而时温等效是预测长期应力松弛的有效方法。在试验基础上,探索时温等效对于木材应力松弛研究的适用性。用动态热机械分析仪进行短期应力松弛试验,获得桦木在不同温度和含水率条件下的一系列应力松弛曲线谱图。通过时温等效,将原始曲线族合成为不同含水率时某一参考温度条件下的主曲线,并且探究了两种位移因子函数的适用性。研究结果表明:在5~95℃温度范围和0%~24%的含水率范围内,时温等效适用于桦木应力松弛,主曲线和位移因子函数均受温度和含水率的影响。 展开更多
关键词 桦木 应力松弛 时温等效 主曲线 参考温度 位移因子函数
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Radical correction of Budd-Chiari syndrome 被引量:4
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作者 LI Xiao-qiang WANG Zhong-gao +4 位作者 MENG Qing-you SANG Hong-fei QIAN Ai-min DUAN Peng-fei rong jian-jie 《Chinese Medical Journal》 SCIE CAS CSCD 2007年第8期622-625,共4页
Background Interventional therapy is widely accepted as the first choice for the treatment of the Budd-Chiari syndrome but the use of radical correctional therapy should not be discarded. This study describes radical ... Background Interventional therapy is widely accepted as the first choice for the treatment of the Budd-Chiari syndrome but the use of radical correctional therapy should not be discarded. This study describes radical correction by controlling bleeding from distal end of pathological segment of the inferior vena cava (IVC) and discusses potential surgical errors and postoperative complications. Methods Of the 216 patients in the study, 78 were treated with simple membranectomy, 64 with dissection of the pathological segment of the IVC and vascular prosthesis or pericardial patch plasty, 60 with resection of the pathological segment of the IVC and orthotopic graft transplantation with vascular prosthesis, and 14 with resection of the occlusive main hepatic vein and its upper IVC, hepatic venous outflow plasty and vascular prosthesis orthotopic graft transplantation from the hepatic venous entrance to the IVC of right atrial ostium. Results Except 14 cases who were discharged after hepatic vein outflow plasty, four cases died postoperatively, and 198 patients were discharged without complications. The symptoms of 15 patients were relieved partially and 2 without any change. There were no deaths intraoperatively. Of the 112 cases who were followed up for 72 months, 13 suffered from a relapse. Conclusions Radical correction is a beneficial therapy in the treatment of Budd-Chiari svndrome. 展开更多
关键词 hepatic vein thrombosis radical correction Budd-Chiari syndrome
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