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水电站水下建筑物受冲磨蚀破坏修复方案研究与实践 被引量:6
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作者 苏畅 谢宝丰 +2 位作者 程科林 赵文龙 杨利锋 《广东水利水电》 2021年第5期17-22,共6页
黄河水沙条件日趋复杂,如何解决水电站水下建筑物的安全问题一直是工程难题。该文以黄河流域某水电站为例,连续2 a经历长历时、低水位、高沙量泄洪排沙等复杂运用工况,经论证水流中携裹大量推移质和沙,造成该电站泄洪排沙系统流道混凝... 黄河水沙条件日趋复杂,如何解决水电站水下建筑物的安全问题一直是工程难题。该文以黄河流域某水电站为例,连续2 a经历长历时、低水位、高沙量泄洪排沙等复杂运用工况,经论证水流中携裹大量推移质和沙,造成该电站泄洪排沙系统流道混凝土受冲磨蚀破坏,流道进出口水下建筑物造成不同程度水毁,严重影响到电站安全稳定运行。研究修复方案前采用水下机器人(ROV)与蛙人潜水相结合的水下检查方式摸清缺陷类型,确定修复范围,分析导致水下建筑物产生缺陷的原因,最后根据水毁缺陷类型研究制定出针对性修复方案,研究成果可为电站水下建筑物冲磨破坏修复提供借鉴。 展开更多
关键词 水电站 水下建筑物 冲蚀 磨蚀 修复方案
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Modified Dachengqi Tang improves decreased gastrointestinal motility in postoperative esophageal cancer patients 被引量:5
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作者 Xu Zejun Xu Cuiping +4 位作者 Ge Hongxia Li Yan Chu Liangliang Zhang Jie cheng kelin 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2015年第3期249-254,共6页
OBJECTIVE:To investigate the clinical effects of modified Dachengqi Tang(DCQT) on promoting gastrointestinal motility in post-operative esophageal cancer patients.METHODS:Sixty postoperative esophageal cancer patients... OBJECTIVE:To investigate the clinical effects of modified Dachengqi Tang(DCQT) on promoting gastrointestinal motility in post-operative esophageal cancer patients.METHODS:Sixty postoperative esophageal cancer patients were enrolled and randomly assigned to the modified treatment group or the control group(30 patients in each group).Patients in the treatment group were given DCQT made from decocted herbs and administered via nasojejunal tube at a dosage of 150 mL.Gastrointestinal motility was assessed by recording time for recovery of bowel sounds,flatus,defecation,and the total amount of gastric drainage during the first three postoperative days.Plasma motilin(MTL) and vasoactive intestinal peptide(VIP) were measured one hour before and three days after surgery.RESULTS:Compared with the control group,the times to first bowel sound,flatus,and defecation were significantly shorter and there was less gastric drainage in the treatment group(P < 0.01,P < 0.01,P < 0.01,and P < 0.05,respectively).In the treatment group,postoperative plasma MTL was significantly higher(P < 0.01) and VIP was significantly lower than those in the control group(P < 0.05).There was no difference found in either MTL or VIP from before to after operation in the treatment group(P > 0.05).MTL was significantly lower and VIP was higher postoperatively in the control group,compared to before surgery(P < 0.01).CONCLUSION:Modified DCQT effectively improved decreased gastrointestinal motility in postoperative esophageal cancer patients by increasing MTL and reducing VIP. 展开更多
关键词 Dachengqi Tang Esophageal neoplasms Gastrointestinal motility Nasojejunal infusion
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