期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
模糊层次分析法确定管线风险因素权重 被引量:49
1
作者 张琳 李长俊 +1 位作者 苏欣 廖柯熹 《石油机械》 北大核心 2006年第6期43-45,3,共3页
采用美国W.K.Muhlbauer提出的管线风险因素评分法,用模糊层次分析法和改进层次分析法分别计算其权重,并与层次分析法得到的结果进行比较,得出如下结论①层次分析法和改进层次分析法计算得到的结果并不理想,甚至严重偏离W.K.Muhlbauer提... 采用美国W.K.Muhlbauer提出的管线风险因素评分法,用模糊层次分析法和改进层次分析法分别计算其权重,并与层次分析法得到的结果进行比较,得出如下结论①层次分析法和改进层次分析法计算得到的结果并不理想,甚至严重偏离W.K.Muhlbauer提出的权重;②模糊层次分析法计算得到的结果和W.K.Muhlbauer提出的权重非常吻合;③层次分析法存在需要检验判断矩阵一致性的缺陷,改进层次分析法存在步骤繁琐,操作不便的缺陷;④模糊层次分析法可以应用于管线风险因素和其他类似因素权重的确定。 展开更多
关键词 模糊层次分析法 改进层次分析法 管线风险因素 权重
下载PDF
模糊综合评价法在海底管线风险分析中的应用 被引量:3
2
作者 朱倩 周晶 《价值工程》 2013年第15期68-70,共3页
针对海底管线工程项目风险的评价具有模糊性的特点,运用模糊数学综合评价原理,结合层次风险分析方法,建立海底管线失效因素系统、确定评价指标体系。通过专家打分法及历史统计数据确定了各影响因素的权重,并结合实际工程状况,运用模糊... 针对海底管线工程项目风险的评价具有模糊性的特点,运用模糊数学综合评价原理,结合层次风险分析方法,建立海底管线失效因素系统、确定评价指标体系。通过专家打分法及历史统计数据确定了各影响因素的权重,并结合实际工程状况,运用模糊层次分析法算出该海底管线的风险值。 展开更多
关键词 海底管线风险因素 层次分析法 模糊综合评价
下载PDF
Long-term prognosis in patients continuing taking antithrombotics after peptic ulcer bleeding 被引量:9
3
作者 Xi-Xu Wang Bo Dong +5 位作者 Biao Hong Yi-Qun Gong Wei Wang Jue Wang Zhen-Yu Zhou Wei-Jun Jiang 《World Journal of Gastroenterology》 SCIE CAS 2017年第4期723-729,共7页
AIM To investigate the long-term prognosis in peptic ulcer patients continuing taking antithrombotics after ulcer bleeding, and to determine the risk factors that influence the prognosis. METHODS All clinical data of ... AIM To investigate the long-term prognosis in peptic ulcer patients continuing taking antithrombotics after ulcer bleeding, and to determine the risk factors that influence the prognosis. METHODS All clinical data of peptic ulcer patients treated from January 1, 2009 to January 1, 2014 were retrospectively collected and analyzed. Patients were divided into either a continuing group to continue taking antithrombotic drugs after ulcer bleeding or a discontinuing group to discontinue antithrombotic drugs. The primary outcome of follow-up in peptic ulcer bleeding patients was recurrent bleeding, and secondary outcome was death or acute cardiovascular disease occurrence. The final date of follow-up was December 31, 2014. Basic demographic data, complications, and disease classifications were analyzed and compared by t- or χ2-test. The number of patients that achieved various outcomes was counted and analyzed statistically. A survival curve was drawn using the Kaplan-Meier method, and the differencewas compared using the log-rank test. COX regression multivariate analysis was applied to analyze risk factors for the prognosis of peptic ulcer patients. RESULTS A total of 167 patients were enrolled into this study. As for the baseline information, differences in age, smoking, alcohol abuse, and acute cardiovascular diseases were statistically significant between the continuing and discontinuing groups(70.8 ± 11.4 vs 62.4 ± 12.0, P < 0.001; 8(8.2%) vs 15(21.7%), P < 0.05; 65(66.3%) vs 13(18.8%), P < 0.001). At the end of the study, 18 patients had recurrent bleeding and three patients died or had acute cardiovascular disease in the continuing group, while four patients had recurrent bleeding and 15 patients died or had acute cardiovascular disease in the discontinuing group. The differences in these results were statistically significant(P = 0.022, P = 0.000). The Kaplan-Meier survival curve indicated that the incidence of recurrent bleeding was higher in patients in the continuing group, and the risk of death and developing acute cardiovascular disease was higher in patients in the discontinuing group(log-rank test, P = 0.000 for both). Furthermore, COX regression multivariate analysis revealed that the hazard ratio(HR) for recurrent bleeding was 2.986(95%CI: 067-8.356, P = 0.015) in the continuing group, while HR for death or acute cardiovascular disease was 5.216(95%CI: 1.035-26.278, P = 0.028).CONCLUSION After the occurrence of peptic ulcer bleeding, continuing antithrombotics increases the risk of recurrent bleeding events, while discontinuing antithrombotics would increase the risk of death and developing cardiovascular disease. This suggests that clinicians should comprehensively consider the use of antithrombotics after peptic ulcer bleeding. 展开更多
关键词 Peptic ulcer bleeding ANTITHROMBOTICS Cardiovascular disease Risk factor Survival curve
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部