基于决策实验室分析法(Decision Making Trial and Evaluation Laboratory,DEMA-TEL)和解释结构模型(Interpretative Structural Modeling Method,ISM)构建了装备保障中心选址问题评价指标体系。在确定的14种装备保障中心选址问题考虑...基于决策实验室分析法(Decision Making Trial and Evaluation Laboratory,DEMA-TEL)和解释结构模型(Interpretative Structural Modeling Method,ISM)构建了装备保障中心选址问题评价指标体系。在确定的14种装备保障中心选址问题考虑因素中,首先利用DEMATEL模型分析各评价指标间的因果关系和影响程度,并将所有指标划分为3层;再通过ISM法则构建多级有向拓扑图,进一步评估了各指标之间的关系,并得到3级评价体系。研究结果表明:与已有研究相比,本文方法可揭示各影响因素之间的内在联系与结构关系;对于装备保障中心选址问题,需要对其直接因素、中间因素和深层因素进行综合考虑,其中,气象条件、交通运输条件、信息化水平、隐蔽及伪装条件、受敌威胁程度等是所有指标中的关键因素,应予以重点关注。展开更多
经α+β两相区变形及退火后的TB6钛合金模锻件低倍组织局部区域显现出了粗晶缺陷。通过热模拟试验,结合微拉伸及扫描电镜(Scanning electron microscope,SEM)、背散射电子衍射仪(Electron black-scattered diffraction,EBSD)等微观分析...经α+β两相区变形及退火后的TB6钛合金模锻件低倍组织局部区域显现出了粗晶缺陷。通过热模拟试验,结合微拉伸及扫描电镜(Scanning electron microscope,SEM)、背散射电子衍射仪(Electron black-scattered diffraction,EBSD)等微观分析手段,分析对比低倍组织中粗、细晶区的显微特点及力学性能,探讨低倍粗晶形成机理,提出低倍粗晶显现的工艺判据并建立预测模型。结果表明,低倍粗晶主要分布在变形温度低且变形程度大的金属剧烈流动区域,与细晶材料相比,粗晶使得屈服强度降低,但伸长率和抗拉强度提高。经两相区加热后,锻件转运过程中表面温度降低,温降导致表面区域温度不均,在大变形速率下,表面圆弧区域软化程度差别较大,易发生部分动态再结晶,产生晶界角较大的动态再结晶晶粒(β相)。退火后,该动态再结晶晶粒通过晶界迁移实现对周边产生的晶界角较小的静态再结晶晶粒的吞并,形成粗晶。变形温度(T)越低,变形量越大且不超过临界值时,低倍粗晶越容易显现。建立T与ε_(f)间的量化关系;以ε_(f)为判据,通过二次开发建立有限元子程序,实现锻件低倍粗晶分布的可视化预测。展开更多
OBJECTIVE:To investigate the benefits of Traditional Chinese Medicine(TCM) therapy for improving the survival of patients with stage I gastric cancer(GC) and high-risk factors in a real-world setting.METHODS:The clini...OBJECTIVE:To investigate the benefits of Traditional Chinese Medicine(TCM) therapy for improving the survival of patients with stage I gastric cancer(GC) and high-risk factors in a real-world setting.METHODS:The clinical data of patients who were diagnosed with stage I GC from March 1,2012 to October 31,2020 were collected.Prognostic analysis was performed to explore the high-risk factors that affected the survival of the patients.A Cox multivariate regression model was used to compare the hazard ratios for the mortality risk of patients,especially those with high-risk factors.Kaplan-Meier survival curve and log-rank test were utilized to assess the survival time.RESULTS:Prognostic analysis demonstrated that female sex,tumor invasion into blood vessels,and Ib stage were independent risk factors.The 1-,3-,and 5-year survival rates of the TCM group vs those of the non-TCM group were 100.0% vs 91.0%,97.6% vs 64.5%,and 81.4% vs 55.5%,respectively.A significant difference in median overall survival(m OS) was found between the two groups(χ2 = 7.670,P = 0.006).Subgroup analysis showed that the m OS of female patients and stage Ib patients in the TCM group were longer than those in the non-TCM group (P ≤ 0.001 and 0.001,respectively).CONCLUSIONS:TCM treatment can improve the survival of patients with stage I GC and high-risk factors.展开更多
文摘基于决策实验室分析法(Decision Making Trial and Evaluation Laboratory,DEMA-TEL)和解释结构模型(Interpretative Structural Modeling Method,ISM)构建了装备保障中心选址问题评价指标体系。在确定的14种装备保障中心选址问题考虑因素中,首先利用DEMATEL模型分析各评价指标间的因果关系和影响程度,并将所有指标划分为3层;再通过ISM法则构建多级有向拓扑图,进一步评估了各指标之间的关系,并得到3级评价体系。研究结果表明:与已有研究相比,本文方法可揭示各影响因素之间的内在联系与结构关系;对于装备保障中心选址问题,需要对其直接因素、中间因素和深层因素进行综合考虑,其中,气象条件、交通运输条件、信息化水平、隐蔽及伪装条件、受敌威胁程度等是所有指标中的关键因素,应予以重点关注。
文摘经α+β两相区变形及退火后的TB6钛合金模锻件低倍组织局部区域显现出了粗晶缺陷。通过热模拟试验,结合微拉伸及扫描电镜(Scanning electron microscope,SEM)、背散射电子衍射仪(Electron black-scattered diffraction,EBSD)等微观分析手段,分析对比低倍组织中粗、细晶区的显微特点及力学性能,探讨低倍粗晶形成机理,提出低倍粗晶显现的工艺判据并建立预测模型。结果表明,低倍粗晶主要分布在变形温度低且变形程度大的金属剧烈流动区域,与细晶材料相比,粗晶使得屈服强度降低,但伸长率和抗拉强度提高。经两相区加热后,锻件转运过程中表面温度降低,温降导致表面区域温度不均,在大变形速率下,表面圆弧区域软化程度差别较大,易发生部分动态再结晶,产生晶界角较大的动态再结晶晶粒(β相)。退火后,该动态再结晶晶粒通过晶界迁移实现对周边产生的晶界角较小的静态再结晶晶粒的吞并,形成粗晶。变形温度(T)越低,变形量越大且不超过临界值时,低倍粗晶越容易显现。建立T与ε_(f)间的量化关系;以ε_(f)为判据,通过二次开发建立有限元子程序,实现锻件低倍粗晶分布的可视化预测。
基金Supported by China Postdoctoral Science Foundation:the Efficacy Evaluation and Proteomics Study of Jianpi Yangzheng Xiaozheng Recipe on the Stage Ⅲ and Ⅳ Gastric Cancer Based on Real-world Evidence(No.137070586)。
文摘OBJECTIVE:To investigate the benefits of Traditional Chinese Medicine(TCM) therapy for improving the survival of patients with stage I gastric cancer(GC) and high-risk factors in a real-world setting.METHODS:The clinical data of patients who were diagnosed with stage I GC from March 1,2012 to October 31,2020 were collected.Prognostic analysis was performed to explore the high-risk factors that affected the survival of the patients.A Cox multivariate regression model was used to compare the hazard ratios for the mortality risk of patients,especially those with high-risk factors.Kaplan-Meier survival curve and log-rank test were utilized to assess the survival time.RESULTS:Prognostic analysis demonstrated that female sex,tumor invasion into blood vessels,and Ib stage were independent risk factors.The 1-,3-,and 5-year survival rates of the TCM group vs those of the non-TCM group were 100.0% vs 91.0%,97.6% vs 64.5%,and 81.4% vs 55.5%,respectively.A significant difference in median overall survival(m OS) was found between the two groups(χ2 = 7.670,P = 0.006).Subgroup analysis showed that the m OS of female patients and stage Ib patients in the TCM group were longer than those in the non-TCM group (P ≤ 0.001 and 0.001,respectively).CONCLUSIONS:TCM treatment can improve the survival of patients with stage I GC and high-risk factors.
