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
The motion of particle clouds(i.e.,sediment clouds)usually can be found in engineering applications such as wastewater discharge,land reclamation,and marine bed capping.In this paper,a series of laboratory tests are c...The motion of particle clouds(i.e.,sediment clouds)usually can be found in engineering applications such as wastewater discharge,land reclamation,and marine bed capping.In this paper,a series of laboratory tests are conducted on coral sand to investigate the shape feature of the single particle and the mixing processes of the coral sand particle clouds.The shape of coral sand particle is measured and quantified.The experimental results demonstrate that the shape of coral sand particles tends to be spherical as the particle size decreases,and empirical equations were established to explain the variation of D50 and fS,50 of coral sand.Compared with the silica sand,the evolution of the coral sand particle cloud still experiences three stages,but the threshold for the Reynolds number of particle clouds entering the next stage changes.Further,the normalized axial distance of the coral sand particle clouds is 58%smaller.The frontal velocity exhibits similar varying tendency for the coral sand particle cloud.Considering the difference in shape between coral sand particles and silica sand particles,a semi-empirical formula was proposed based on the original silica sand prediction formula by adding the shape factor and the experimental data of 122μm≤D_(50)≤842μm.It can predict the frontal velocity of the coral sand particle clouds.展开更多
At 26, Li Dan could have a promising career as an astronomy major at Beijing Normal University for undergraduate studies and a solar physics major at the National Astronomical Observatory under the Chinese Academy of ...At 26, Li Dan could have a promising career as an astronomy major at Beijing Normal University for undergraduate studies and a solar physics major at the National Astronomical Observatory under the Chinese Academy of Sciences for graduate studies. Few people would anticipate that the young man with such a strong science background would give up science to devote himself completely to children orphaned by AIDS.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financially supported by the National Natural Science Foundation of China(Grant No.51839002,51979014 and 52271257)the Natural Science Foundation of Hunan Province(Grant No.2022JJ10047)the Scientific Research Innovation Project of Hunan Graduate(Grant No.CX20200858).
文摘The motion of particle clouds(i.e.,sediment clouds)usually can be found in engineering applications such as wastewater discharge,land reclamation,and marine bed capping.In this paper,a series of laboratory tests are conducted on coral sand to investigate the shape feature of the single particle and the mixing processes of the coral sand particle clouds.The shape of coral sand particle is measured and quantified.The experimental results demonstrate that the shape of coral sand particles tends to be spherical as the particle size decreases,and empirical equations were established to explain the variation of D50 and fS,50 of coral sand.Compared with the silica sand,the evolution of the coral sand particle cloud still experiences three stages,but the threshold for the Reynolds number of particle clouds entering the next stage changes.Further,the normalized axial distance of the coral sand particle clouds is 58%smaller.The frontal velocity exhibits similar varying tendency for the coral sand particle cloud.Considering the difference in shape between coral sand particles and silica sand particles,a semi-empirical formula was proposed based on the original silica sand prediction formula by adding the shape factor and the experimental data of 122μm≤D_(50)≤842μm.It can predict the frontal velocity of the coral sand particle clouds.
文摘At 26, Li Dan could have a promising career as an astronomy major at Beijing Normal University for undergraduate studies and a solar physics major at the National Astronomical Observatory under the Chinese Academy of Sciences for graduate studies. Few people would anticipate that the young man with such a strong science background would give up science to devote himself completely to children orphaned by AIDS.
