目的基于逆境和精神病理维度模型(dimensional model of adversity and psychopathology,DMAP)探索重性抑郁发作患者的威胁型和剥夺型儿童期创伤与功能失调性态度的关联。方法收集970例重性抑郁发作患者资料,根据简版儿童期创伤问卷(chi...目的基于逆境和精神病理维度模型(dimensional model of adversity and psychopathology,DMAP)探索重性抑郁发作患者的威胁型和剥夺型儿童期创伤与功能失调性态度的关联。方法收集970例重性抑郁发作患者资料,根据简版儿童期创伤问卷(childhood trauma questionnaire,CTQ-SF)评分将患者分为无创伤组(426例)、仅威胁组(86例)、仅剥夺组(210例)、混合组(248例),采用功能失调性态度量表(dysfunctional attitudes scale,DAS)评估患者的认知歪曲情况,DAS得分大于所有受试者得分的上四分位数定义为高认知歪曲。采用多因素logistic回归分析探究患者威胁型和剥夺型创伤与功能失调性态度的关联。结果无创伤组、仅威胁组、仅剥夺组、混合组整体高认知歪曲者比例存在统计学差异(19.25%vs.30.23%vs.20.00%vs.35.89%,P<0.001),且各维度高认知歪曲比例均存在统计学差异(P≤0.001)。多因素logistic回归分析显示,威胁型创伤与整体高认知歪曲呈正关联(OR=2.031,P<0.001),且威胁型创伤与DAS中脆弱性(OR=1.709,P<0.001)、吸引与排斥(OR=2.088,P<0.001)、完美化(OR=2.321,P<0.001)、强制性(OR=1.765,P=0.001)、寻求赞许(OR=1.837,P<0.001)、依赖性(OR=1.554,P=0.006)、自主性态度(OR=1.864,P<0.001)等7个维度高认知歪曲呈正关联,剥夺型创伤仅与认知哲学维度高认知歪曲呈正关联(OR=1.495,P=0.015)。结论重性抑郁发作患者的儿童期创伤与功能失调性态度紧密相关,威胁型创伤与整体及除认知哲学外的维度高认知歪曲正相关,而剥夺型创伤仅与认知哲学维度高认知歪曲正相关。展开更多
In order to study the response law of vortex-induced vibration(VIV)of marine risers under the combined action of roughness and interference effects,and to reveal the coupling mechanism of roughness and interference ef...In order to study the response law of vortex-induced vibration(VIV)of marine risers under the combined action of roughness and interference effects,and to reveal the coupling mechanism of roughness and interference effects on the riser,a VIV experiment of rough risers in tandem arrangement was conducted in a wave−current combined flume.The experiment characterized the risers’roughness by arranging different specifications of attachments on the surface of the risers.Three rough risers with different roughness and smooth risers were arranged in tandem arrangement,with the rough risers arranged downstream.The experimental results indicate that the suppression of the attachments on the downstream risers’vibration are more significant both in the CF and IL directions as the reduced velocity increases.For the downstream riser,the amplitude response of rough riser is more significantly weakened compared with the smooth one at high reduced velocity.For the upstream risers,changes in the roughness and spacing ratio have an impact on their‘lock-in’region.When the roughness of downstream risers is relatively large(0.1300)and the spacing between risers is small(S/D=4.0),the reduced velocity range of‘lock-in’region in the CF direction of upstream risers is obviously expanded,and the displacement in the‘lock-in’region is severer.展开更多
A vortex-induced vibration(VIV)experiment of rough risers with coupling interference effect under a side-by-side arrangement was carried out in a wave-current combined flume.The roughness of the riser was characterize...A vortex-induced vibration(VIV)experiment of rough risers with coupling interference effect under a side-by-side arrangement was carried out in a wave-current combined flume.The roughness of the riser was characterized by arranging different specifications of surface attachments on the surface of the riser.Rough risers with three different roughnesses were arranged side by side with smooth risers to explore the VIV response of the riser under the combined action of roughness and interference effect,and to reveal the coupling mechanism between roughness and interference effect.The experimental results show that,compared with that of a smooth riser,the VIV of a rough riser under the coupling interference effect has a wider"lock-in"region,and the displacement decreases more significantly at a high reduced velocity,which is more likely to excite higher-order modes and frequency responses.In addition,the displacement response and frequency response of the smooth riser are not significantly affected by wake interference from the rough riser,which is caused by the decrease of the wake region due to the delay of the boundary layer separation point of the rough riser.展开更多
针对长江南京段生态健康问题,于2019年平水期和丰水期在长江南京段干流的10个断面和21条入江支流进行采样,利用高通量测序的方法研究底质细菌群落的结构组成,构建了底质细菌群落完整性指数(benthic bacteria-index of biological integr...针对长江南京段生态健康问题,于2019年平水期和丰水期在长江南京段干流的10个断面和21条入江支流进行采样,利用高通量测序的方法研究底质细菌群落的结构组成,构建了底质细菌群落完整性指数(benthic bacteria-index of biological integrity,B-IBI)。结果表明:平水期长江南京段的生态健康要优于丰水期,长江干流断面要优于支流断面;TN、NH_(3)-N、NO_(3)^(-)、TOC与B-IBI呈显著负相关,Shannon指数、Margalef指数、Evenness指数与B-IBI呈显著正相关;研究建立的评价体系对于长江水质状况和生境有较好的指示作用;硬质护坡或河底对于入江支流细菌群落的多样性有负面影响,建议在确保防汛的基础上加强河道的生态修复。展开更多
文摘目的基于逆境和精神病理维度模型(dimensional model of adversity and psychopathology,DMAP)探索重性抑郁发作患者的威胁型和剥夺型儿童期创伤与功能失调性态度的关联。方法收集970例重性抑郁发作患者资料,根据简版儿童期创伤问卷(childhood trauma questionnaire,CTQ-SF)评分将患者分为无创伤组(426例)、仅威胁组(86例)、仅剥夺组(210例)、混合组(248例),采用功能失调性态度量表(dysfunctional attitudes scale,DAS)评估患者的认知歪曲情况,DAS得分大于所有受试者得分的上四分位数定义为高认知歪曲。采用多因素logistic回归分析探究患者威胁型和剥夺型创伤与功能失调性态度的关联。结果无创伤组、仅威胁组、仅剥夺组、混合组整体高认知歪曲者比例存在统计学差异(19.25%vs.30.23%vs.20.00%vs.35.89%,P<0.001),且各维度高认知歪曲比例均存在统计学差异(P≤0.001)。多因素logistic回归分析显示,威胁型创伤与整体高认知歪曲呈正关联(OR=2.031,P<0.001),且威胁型创伤与DAS中脆弱性(OR=1.709,P<0.001)、吸引与排斥(OR=2.088,P<0.001)、完美化(OR=2.321,P<0.001)、强制性(OR=1.765,P=0.001)、寻求赞许(OR=1.837,P<0.001)、依赖性(OR=1.554,P=0.006)、自主性态度(OR=1.864,P<0.001)等7个维度高认知歪曲呈正关联,剥夺型创伤仅与认知哲学维度高认知歪曲呈正关联(OR=1.495,P=0.015)。结论重性抑郁发作患者的儿童期创伤与功能失调性态度紧密相关,威胁型创伤与整体及除认知哲学外的维度高认知歪曲正相关,而剥夺型创伤仅与认知哲学维度高认知歪曲正相关。
基金supported by the Natural Science Foundation of Shandong Province(Grant Nos.ZR2023ME040 and ZR2022QE118)the Key Technology Research and Development Program of Shandong Province(Grant No.2023CXGC010316)the Natural Science Foundation of Qingdao(Grant No.23-2-1-207-zyyd-jch),and the National Natural Science Foundation of China(Grant No.51709161).
文摘In order to study the response law of vortex-induced vibration(VIV)of marine risers under the combined action of roughness and interference effects,and to reveal the coupling mechanism of roughness and interference effects on the riser,a VIV experiment of rough risers in tandem arrangement was conducted in a wave−current combined flume.The experiment characterized the risers’roughness by arranging different specifications of attachments on the surface of the risers.Three rough risers with different roughness and smooth risers were arranged in tandem arrangement,with the rough risers arranged downstream.The experimental results indicate that the suppression of the attachments on the downstream risers’vibration are more significant both in the CF and IL directions as the reduced velocity increases.For the downstream riser,the amplitude response of rough riser is more significantly weakened compared with the smooth one at high reduced velocity.For the upstream risers,changes in the roughness and spacing ratio have an impact on their‘lock-in’region.When the roughness of downstream risers is relatively large(0.1300)and the spacing between risers is small(S/D=4.0),the reduced velocity range of‘lock-in’region in the CF direction of upstream risers is obviously expanded,and the displacement in the‘lock-in’region is severer.
基金financially supported by the Natural Science Foundation of Shandong Province(Grant Nos.ZR2023ME040 and ZR2022QE118)the Key Technology Research and Development Program of Shandong Province(Grant No.2023CXGC010316)+1 种基金the Natural Science Foundation of Qingdao(Grant No.23-2-1-207-zyyd-jch)the Introduction and Education Plan for Young Innovative talents in Colleges and Universities of Shandong Province(Marine Civil Engineering Materials and Structure Innovation Research Team).
文摘A vortex-induced vibration(VIV)experiment of rough risers with coupling interference effect under a side-by-side arrangement was carried out in a wave-current combined flume.The roughness of the riser was characterized by arranging different specifications of surface attachments on the surface of the riser.Rough risers with three different roughnesses were arranged side by side with smooth risers to explore the VIV response of the riser under the combined action of roughness and interference effect,and to reveal the coupling mechanism between roughness and interference effect.The experimental results show that,compared with that of a smooth riser,the VIV of a rough riser under the coupling interference effect has a wider"lock-in"region,and the displacement decreases more significantly at a high reduced velocity,which is more likely to excite higher-order modes and frequency responses.In addition,the displacement response and frequency response of the smooth riser are not significantly affected by wake interference from the rough riser,which is caused by the decrease of the wake region due to the delay of the boundary layer separation point of the rough riser.
文摘针对长江南京段生态健康问题,于2019年平水期和丰水期在长江南京段干流的10个断面和21条入江支流进行采样,利用高通量测序的方法研究底质细菌群落的结构组成,构建了底质细菌群落完整性指数(benthic bacteria-index of biological integrity,B-IBI)。结果表明:平水期长江南京段的生态健康要优于丰水期,长江干流断面要优于支流断面;TN、NH_(3)-N、NO_(3)^(-)、TOC与B-IBI呈显著负相关,Shannon指数、Margalef指数、Evenness指数与B-IBI呈显著正相关;研究建立的评价体系对于长江水质状况和生境有较好的指示作用;硬质护坡或河底对于入江支流细菌群落的多样性有负面影响,建议在确保防汛的基础上加强河道的生态修复。
