简介:本文详细讲述如何在Delphi中实现Sinleton,并解决实现中的一系列问题。
简介:AbstractObjective:To investigate whether the fetal gender affects the incidence of pre-eclampsia (PE) and fetal growth restriction (FGR) in singleton and twin pregnancies.Methods:This was a 10-year single-center, retrospective, cohort study from January 2009 to January 2019. A total of 57,129 singleton and 3699 twin pregnancies aged between 18-55 years old were recruited at the Third Affiliated Hospital of Guangzhou Medical University, China. We used multivariable logistic regression to analyze the effect of fetal gender on the incidence of PE and FGR.Results:In singleton pregnancies, the incidence rates of PE and FGR with a female fetus were higher than those with a male fetus (6.4% (1713/26,793) vs. 5.9% (1803/30,336), P < 0.05 and 3.5% (932/26,793) vs. 2.4% (745/30,336), P < 0.05, respectively). A female fetus was an independent risk factor for either PE or FGR (adjusted odds ratio: 1.169 or 1.563; 95% confidence interval: 1.036-1.319 or 1.349-1.810, respectively). In twin pregnancies, the incidence of early-onset PE was greater in pregnancies with two females compared with two males or one male plus one female (4.6% (46/1003) vs. 4.1% (54/1305) vs. 2.4% (33/1391), P < 0.05). Female-female twins was an independent risk factor for PE (adjusted odds ratio: 1.367, 95% confidence interval: 1.011-1.849), especially early-onset PE.Conclusion:The female fetus was associated with PE in both singleton and twin pregnancies and was also a risk factor of FGR in singleton pregnancies.
简介:摘要为探究教育模式、人才培养模式和教学模式的概念差异,研究采用文献法、比较法,从概念内涵、侧重点方面进行了分析。通过对比,教育模式的内涵最广,侧重于多样性,是以强调目的性和价值观传授的人才培养模式的上位概念,而拥有具体性的教学模式成为培养模式的下位概念。
简介:摘要:在中国经济结构不断调整改革的情况下,建筑业也在不断加快发展,EPC模式正以其独特优势在中国积极实施。由于我国大多数建筑企业对成本控制缺乏明确认识,尚未形成高效完善的成本控制体系,导致项目实施过程中出现了诸多成本管理问题和争议。作为EPC项目管理的核心要素,成本管理是提高效率、促进发展的必要条件.因此,开发EPC模型的关键是明确成本控制的方向,选择符合项目实际需要的有效成本管理方法。综上所述,本文可以说是朝着这个方向展开了一项具有现实意义的研究。
简介:摘要:在中国经济结构不断调整改革的情况下,建筑业也在不断加快发展,EPC模式正以其独特优势在中国积极实施。由于我国大多数建筑企业对成本控制缺乏明确认识,尚未形成高效完善的成本控制体系,导致项目实施过程中出现了诸多成本管理问题和争议。作为EPC项目管理的核心要素,成本管理是提高效率、促进发展的必要条件.因此,开发EPC模型的关键是明确成本控制的方向,选择符合项目实际需要的有效成本管理方法。综上所述,本文可以说是朝着这个方向展开了一项具有现实意义的研究。
简介:PPP是适应“国家治理现代化”、“市场起决定性作用”、“加快转变政府职能”、“建立现代财政制度”、“推动城镇化健康发展”要求的一次变革,具有缓解“融资平台债务高”、“公共供给效率低”、“私人资本进入难”等矛盾和问题的作用,同时也是推行政府向社会力量购买服务、发展混合所有制等一系列改革政策的重要抓手。但也必须清醒地认识到,PPP不是也不可能成为包治百病的良药,不是所有的项目都适用于PPP,国际上失败的PPP项目也有不少,只有那些能实现VFM的项目才能真正实现双赢。——亚洲开发银行高级项目官员肖光睿《PPP热潮的冷思考》