接纳承诺疗法(Acceptance and Commitment Therapy,ACT)被认为是行为治疗“第三浪潮”的重要代表。本研究使用元分析结构方程模型,考察ACT的作用机制。通过数据库检索与筛选,最终纳入文献50篇。结果发现:ACT所假设的心理灵活性、接纳、...接纳承诺疗法(Acceptance and Commitment Therapy,ACT)被认为是行为治疗“第三浪潮”的重要代表。本研究使用元分析结构方程模型,考察ACT的作用机制。通过数据库检索与筛选,最终纳入文献50篇。结果发现:ACT所假设的心理灵活性、接纳、此时此刻、价值的中介作用都达到统计显著,认知解离这一中介变量并不显著;中介机制在网络化干预中仍然得到检验;相较之传统CBT,ACT在所假设的机制上有其区别于CBT的优势。后续临床研究应更全面地测量6大核心机制,关注对美好生活提升的影响,采用多点瞬时评价法,并尽可能使用更高级、更先进的统计方法检验其作用机制。展开更多
This paper studies the damage-viscoelastic behavior of composite solid propellants of solid rocket motors(SRM).Based on viscoelastic theories and strain equivalent hypothesis in damage mechanics,a three-dimensional(3-...This paper studies the damage-viscoelastic behavior of composite solid propellants of solid rocket motors(SRM).Based on viscoelastic theories and strain equivalent hypothesis in damage mechanics,a three-dimensional(3-D)nonlinear viscoelastic constitutive model incorporating with damage is developed.The resulting viscoelastic constitutive equations are numerically discretized by integration algorithm,and a stress-updating method is presented by solving nonlinear equations according to the Newton-Raphson method.A material subroutine of stress-updating is made up and embedded into commercial code of Abaqus.The material subroutine is validated through typical examples.Our results indicate that the finite element results are in good agreement with the analytical ones and have high accuracy,and the suggested method and designed subroutine are efficient and can be further applied to damage-coupling structural analysis of practical SRM grain.展开更多
文摘接纳承诺疗法(Acceptance and Commitment Therapy,ACT)被认为是行为治疗“第三浪潮”的重要代表。本研究使用元分析结构方程模型,考察ACT的作用机制。通过数据库检索与筛选,最终纳入文献50篇。结果发现:ACT所假设的心理灵活性、接纳、此时此刻、价值的中介作用都达到统计显著,认知解离这一中介变量并不显著;中介机制在网络化干预中仍然得到检验;相较之传统CBT,ACT在所假设的机制上有其区别于CBT的优势。后续临床研究应更全面地测量6大核心机制,关注对美好生活提升的影响,采用多点瞬时评价法,并尽可能使用更高级、更先进的统计方法检验其作用机制。
基金supported by the National Natural Science Foundation of China(Grant No.11132012)
文摘This paper studies the damage-viscoelastic behavior of composite solid propellants of solid rocket motors(SRM).Based on viscoelastic theories and strain equivalent hypothesis in damage mechanics,a three-dimensional(3-D)nonlinear viscoelastic constitutive model incorporating with damage is developed.The resulting viscoelastic constitutive equations are numerically discretized by integration algorithm,and a stress-updating method is presented by solving nonlinear equations according to the Newton-Raphson method.A material subroutine of stress-updating is made up and embedded into commercial code of Abaqus.The material subroutine is validated through typical examples.Our results indicate that the finite element results are in good agreement with the analytical ones and have high accuracy,and the suggested method and designed subroutine are efficient and can be further applied to damage-coupling structural analysis of practical SRM grain.