The premature ejaculation diagnostic tool （PEDT） is a brief diagnostic measure to assess premature ejaculation （PE）. However, there is insufficient evidence regarding its validity in the new evidence-based-defined...The premature ejaculation diagnostic tool （PEDT） is a brief diagnostic measure to assess premature ejaculation （PE）. However, there is insufficient evidence regarding its validity in the new evidence-based-defined PE. This study was performed to evaluate the validity of PEDT and its association with IIEF-15 in different types of evidence-based-defined PE. From June 2015 to January 2016, a total of 260 men complaining of PE and defined as lifelong PE （LPE）/acquired PE （APE） according to the evidence-based definition from Andrology Clinic of the First Affiliated Hospital of Anhui Medical University, along with 104 male healthy controls without PE from a medical examination center, were enrolled in this study. All individuals completed questionnaires including demographics, medical and sexual history, as well as PEDT and IIEF-15. After statistical analysis, it was found that men with PE reported higher PEDT scores （14.28 ± 3.05） and lower IIEF-15 （41.26 ± 8.20） than men without PE （PEDT： 5.32 ± 3.42, IIEF-15：52.66 ± 6.86, P 〈 0.001 for both）. It was suggested that a score of 〉9 indicated PE in both LPE and APE by sensitivity and specificity analyses （sensitivity： 0.875, 0.913; specificity： 0.865, 0.865, respectively）. In addition, IIEF-15 were higher in men with LPE （42.64 ± 8.11） than APE （39.43 ± 7.84, P 〈 0.001）. After adjusting for age, IIEF-15 was negatively related to PEDT in men with LPE （adjust r = -0.225, P 〈 0.001） and APE （adjust r = -0.378, P 〈 0.001）. In this study, we concluded that PEDT was valid in the diagnosis of evidenced-based-defined PE. Furthermore, IIEF-15 was negatively related to PEDT in men with different types of PE.展开更多
目的针对15-5PH钢零件再制造后性能调控缺乏试验和数据支撑的问题,研究热处理温度对15-5PH熔覆层微观组织及力学性能的影响。方法利用冷金属过渡(Cold Metal Transfer,CMT)工艺制备了连续、平整、无宏观缺陷的熔覆层,并采用不同温度对...目的针对15-5PH钢零件再制造后性能调控缺乏试验和数据支撑的问题,研究热处理温度对15-5PH熔覆层微观组织及力学性能的影响。方法利用冷金属过渡(Cold Metal Transfer,CMT)工艺制备了连续、平整、无宏观缺陷的熔覆层,并采用不同温度对熔覆层进行了热处理。利用光学显微镜、XRD、SEM和EDS等手段分析了熔覆层的微观组织、物相组成,通过拉伸试验、剪切试验测试了熔覆层力学性能。结果焊态熔覆层主要由马氏体、铁素体、球状碳化物构成,不同区域的马氏体、铁素体形态有显著差异。随热处理温度的升高,焊道中间区域微观组织差异逐渐减小,尺寸有增加的趋势,经580℃、620℃热处理后,马氏体晶界上生成白色块状逆转变奥氏体,而且逆转变奥氏体含量和尺寸随温度的升高逐渐增加。此外,经450℃热处理后,熔覆层的屈服强度、抗拉强度、剪切强度达到最高,分别为1251、1318、674.9 MPa,伸长率仅为3.6%;当温度高于450℃时,随温度的升高,屈服强度、抗拉强度、剪切强度逐渐降低,伸长率增加。结论探明了热处理温度对再制造15-5PH熔覆层组织和性能的影响规律,为再制造15-5PH零件的热处理提供了依据。展开更多
文摘The premature ejaculation diagnostic tool （PEDT） is a brief diagnostic measure to assess premature ejaculation （PE）. However, there is insufficient evidence regarding its validity in the new evidence-based-defined PE. This study was performed to evaluate the validity of PEDT and its association with IIEF-15 in different types of evidence-based-defined PE. From June 2015 to January 2016, a total of 260 men complaining of PE and defined as lifelong PE （LPE）/acquired PE （APE） according to the evidence-based definition from Andrology Clinic of the First Affiliated Hospital of Anhui Medical University, along with 104 male healthy controls without PE from a medical examination center, were enrolled in this study. All individuals completed questionnaires including demographics, medical and sexual history, as well as PEDT and IIEF-15. After statistical analysis, it was found that men with PE reported higher PEDT scores （14.28 ± 3.05） and lower IIEF-15 （41.26 ± 8.20） than men without PE （PEDT： 5.32 ± 3.42, IIEF-15：52.66 ± 6.86, P 〈 0.001 for both）. It was suggested that a score of 〉9 indicated PE in both LPE and APE by sensitivity and specificity analyses （sensitivity： 0.875, 0.913; specificity： 0.865, 0.865, respectively）. In addition, IIEF-15 were higher in men with LPE （42.64 ± 8.11） than APE （39.43 ± 7.84, P 〈 0.001）. After adjusting for age, IIEF-15 was negatively related to PEDT in men with LPE （adjust r = -0.225, P 〈 0.001） and APE （adjust r = -0.378, P 〈 0.001）. In this study, we concluded that PEDT was valid in the diagnosis of evidenced-based-defined PE. Furthermore, IIEF-15 was negatively related to PEDT in men with different types of PE.
文摘目的针对15-5PH钢零件再制造后性能调控缺乏试验和数据支撑的问题,研究热处理温度对15-5PH熔覆层微观组织及力学性能的影响。方法利用冷金属过渡(Cold Metal Transfer,CMT)工艺制备了连续、平整、无宏观缺陷的熔覆层,并采用不同温度对熔覆层进行了热处理。利用光学显微镜、XRD、SEM和EDS等手段分析了熔覆层的微观组织、物相组成,通过拉伸试验、剪切试验测试了熔覆层力学性能。结果焊态熔覆层主要由马氏体、铁素体、球状碳化物构成,不同区域的马氏体、铁素体形态有显著差异。随热处理温度的升高,焊道中间区域微观组织差异逐渐减小,尺寸有增加的趋势,经580℃、620℃热处理后,马氏体晶界上生成白色块状逆转变奥氏体,而且逆转变奥氏体含量和尺寸随温度的升高逐渐增加。此外,经450℃热处理后,熔覆层的屈服强度、抗拉强度、剪切强度达到最高,分别为1251、1318、674.9 MPa,伸长率仅为3.6%;当温度高于450℃时,随温度的升高,屈服强度、抗拉强度、剪切强度逐渐降低,伸长率增加。结论探明了热处理温度对再制造15-5PH熔覆层组织和性能的影响规律,为再制造15-5PH零件的热处理提供了依据。
