期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
考虑全生命周期的露天矿边坡时效稳定性分析 被引量:2
1
作者 包敏 陈忠辉 +2 位作者 王雄 杨继海 申作栋 《矿业科学学报》 CSCD 2021年第5期606-614,共9页
基于开挖岩体蠕变劣化效应对露天矿高边坡稳定性的影响,提出了全生命周期内边坡的稳定性模型。引入岩石强度劣化理论,推导了时间效应下安全系数的计算公式。考虑锚索的预应力损失和边坡蠕变现象,建立了预应力损失条件下边坡安全系数的... 基于开挖岩体蠕变劣化效应对露天矿高边坡稳定性的影响,提出了全生命周期内边坡的稳定性模型。引入岩石强度劣化理论,推导了时间效应下安全系数的计算公式。考虑锚索的预应力损失和边坡蠕变现象,建立了预应力损失条件下边坡安全系数的表达式,分析了时间因素和锚索预应力损失对边坡稳定性的影响规律。以大孤山西井边坡为例,借助FLAC3D内置的FISH语言把劣化理论嵌入到强度折减法中,利用改进的强度折减法计算了边坡的时效安全系数。结果表明:岩石强度随时间延长呈“L”型劣化,使得蠕变型边坡的安全系数低于只考虑开挖的情况,与实际工程更加吻合,受锚索预应力损失的影响已加固边坡仍有失稳的风险。比选了4种锚索的加固调控方案,在满足全生命周期内安全生产的前提下,获得了经济效益最优的方案。 展开更多
关键词 蠕变 全生命周期 劣化理论 预应力损失 时效安全系数
下载PDF
高铁客站房建设备结构变形监测技术的研究与应用
2
作者 吴亚奇 《上海铁道》 2020年第S02期60-63,共4页
针对高铁客站站房、雨棚、站台等房建设备易受地质、外部施工、列车振动等环境影响产生变形,为了做到实时、长期、有效的变形监测,探索利用北斗GNSS定位技术和脉冲静力水准仪对高铁房建设备结构变形情况开展监测技术研究的重要意义。
关键词 高铁站房 雨棚 变形监测 安全时效
下载PDF
Safety and efficacy of Profermin~to induce remission in ulcerative colitis 被引量:2
3
作者 Aleksander Krag Hans Israelsen +2 位作者 Bjrn von Ryberg Klaus K Andersen Flemming Bendtsen 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第15期1773-1780,共8页
AIM:To test the efficacy and safety of Profermin in inducing remission in patients with active ulcerative colitis(UC).METHODS:The study included 39 patients with mild to moderate UC defined as a Simple Clinical Coliti... AIM:To test the efficacy and safety of Profermin in inducing remission in patients with active ulcerative colitis(UC).METHODS:The study included 39 patients with mild to moderate UC defined as a Simple Clinical Colitis Activity Index(SCCAI)>4 and<12(median:7.5),who were treated open-label with Profermintwice daily for 24 wk.Daily SCCAI was reported observer blinded via the Internet.RESULTS:In an intention to treat(ITT)analysis,the mean reduction in SCCAI score was 56.5%.Of the 39 patients,24(62%)reached the primary endpoint,which was proportion of patients with≥50%reduction in SCCAI.Our secondary endpoint,the proportion of patients in remission defined as SCCAI≤2.5,was in ITT analysis reached in 18 of the 39 patients(46%).In a repeated-measure regression analysis,the estimated mean reduction in score was 5.0 points(95%CI:4.1-5.9,P<0.001)and the estimated mean time taken to obtain half the reduction in score was 28 d(95%CI:26-30).There were no serious adverse events(AEs)or withdrawals due to AEs.Profermin was generally well tolerated.CONCLUSION:Profermin is safe and may be effective in inducing remission of active UC. 展开更多
关键词 Ulcerative colitis DIET Probiotic Profermin Inflammatory bowel disease Dietary management Medical foods
下载PDF
Clinical Efficacy and Safety Analysis of Laparoscopic- assisted Vaginal Surgery and Laparoscopic-alone Surgery in Treatment of Endometrial Cancer
4
作者 HU Duoduo XU Ming-juan 《International Journal of Technology Management》 2014年第10期91-93,共3页
Objective: Assess clinical efficacy and safety analysis of laparoscopic-assisted vaginal surgery and laparoscopic-alone surgery in treatment of endometrial cancer. Methods: select 76 cases of endometrial cancer pati... Objective: Assess clinical efficacy and safety analysis of laparoscopic-assisted vaginal surgery and laparoscopic-alone surgery in treatment of endometrial cancer. Methods: select 76 cases of endometrial cancer patients, divided into two groups, 40 in laparoscopic-alone group and 36 in laparoscopic-assisted group, and compare operation time, intraoperative blood loss, intraoperative complications, postoperative complications, lymph node number, anal exhaust time, indwelling catheter days and hospitalization days by group. Result: compared with laparoscopic-alone surgery, laparoscopic-assisted vaginal surgery has certain advantages in reducing intraoperative blood loss, intraoperative and postoperative complications, anal exhaust time, indwelling catheter days and hospitalization days. Discussion: laparoscopic-assisted vaginal surgery is a relatively safe, effective and good economic benefit surgical method in treatment of endometrial cancer. 展开更多
关键词 Clinical Efficacy Laparoscopic Surgery Vaginal Surgery Endometrial Cancer
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部