目的 探讨单体位[头尾位(craniocaudal, CC)或内外侧斜位(mediolateral oblique, MLO)]数字化乳腺断层合成技术(digital breast tomosynthesis,DBT)联合全视野数字化乳腺X线摄影(full-fild digital mammography,FFDM)检查对乳腺癌的检...目的 探讨单体位[头尾位(craniocaudal, CC)或内外侧斜位(mediolateral oblique, MLO)]数字化乳腺断层合成技术(digital breast tomosynthesis,DBT)联合全视野数字化乳腺X线摄影(full-fild digital mammography,FFDM)检查对乳腺癌的检出率和诊断效能。方法 选取141例乳腺病变患者影像学资料,患者同时行乳腺DBT和FFDM检查。由2位放射科诊断医师分别对患者DBT图像进行单体位和双体位(CC+MLO)阅片并联合FFDM,以病理结果为金标准。分析单体位和双体位DBT检查联合FFDM检查对患者乳腺良恶性病灶的检出率及诊断效能。结果 141例患者按照ACR2013版BI-RADS系统分类标准:a类3例、b类40例、c类84例、d类14例。根据BI-RADS评级标准,2位放射科诊断医师采用四种诊断方式(DBT-CC,DBT-MLO及双体位DBT分别联合FFDM及单独FFDM)进行诊断。结论 采用DBT+FFDM的阅片方式无论是单体位还是双体位的结果假阳性率及假阴性率均低于FFDM,诊断的准确度、特异度及灵敏度均高于FFDM,对高/低年资诊断医师FFDM+DBT双体位的诊断效能高于单体位,在FFDM+DBT-CC和FFDM+DBT-MLO单体位之间准确度、灵敏度和特异度MLO均高于CC位。展开更多
目的利用主客体互倚模型探讨克罗恩病患者及其配偶主观幸福感对婚姻调适的作用。方法采取方便抽样法,抽取南京市某3级甲等医院210对患者及配偶为研究对象,选用自制一般资料调查表、主观幸福感量表简表(Subjective Well-being Scale for ...目的利用主客体互倚模型探讨克罗恩病患者及其配偶主观幸福感对婚姻调适的作用。方法采取方便抽样法,抽取南京市某3级甲等医院210对患者及配偶为研究对象,选用自制一般资料调查表、主观幸福感量表简表(Subjective Well-being Scale for Chinese Citizens,SWBS-CC20)、Locke-Wollance婚姻调适测定(Locke-Wollance Marital Adjustment Test,LWMAT)对其进行调查。采用独立样本t检验和卡方检验比较夫妻主观幸福感和婚姻调适方面的差异,通过主客体互倚模型和Pearson分析法,分析夫妻双方主观幸福感对婚姻调适的影响。结果患者和配偶各自的主观幸福感均可以正向预测自身婚姻调适(β=0.67、0.71,P<0.01),即主体效应明显;同时,患者与配偶的主观幸福感均能正向预测对方的婚姻调适(β=0.47、0.46,P<0.01),即客体效应明显。结论克罗恩病患者及配偶的婚姻调适受自身及对方主观幸福感的交互影响,且主观幸福感与婚姻调适之间主体效应和客体效应显著。因此应将克罗恩病患者及配偶视为一个整体,关注夫妻双方的二元交互影响,积极探索以夫妻为中心的婚姻调适干预方案,对改善克罗恩病夫妻的心理适应有重要意义。展开更多
This paper presents a new method for simulating the evolution of a gully head in a loess catchment with cellular automata(CA) based on the Fisher discriminant. The experimental site is an indoor loess catchment that w...This paper presents a new method for simulating the evolution of a gully head in a loess catchment with cellular automata(CA) based on the Fisher discriminant. The experimental site is an indoor loess catchment that was constructed in a fixed-intensity rainfall erosion test facility. Nine high-resolution digital elevation model(DEM) data sets were gathered by close range photogrammetry during different phases of the experiment. To simulate the evolution of the catchment gully head, we assumed the following. First, the 5th and 6th DEM data sets were used as a data source for acquiring the location of the catchment gully head and for obtaining spatial variables with GIS spatial analysis tools. Second, the Fisher discriminant was used to calculate the weight of the spatial variables to determine the transition probabilities. Third, CA model was structured to simulate the evolution of the gully head by iterative looping. The status of the cell in the CA models was dynamically updated at the end of each loop to obtain realistic results. Finally, the nearest neighbor, G-function, K-function, Moran′s I and fractal indexes were used to evaluate the model results. Overall, the CA model can be used to simulate the evolution of a loess gully head. The experiment demonstrated the advantages of the CA model which can simulate the dynamic evolution of gully head evolution in a catchment.展开更多
文摘目的利用主客体互倚模型探讨克罗恩病患者及其配偶主观幸福感对婚姻调适的作用。方法采取方便抽样法,抽取南京市某3级甲等医院210对患者及配偶为研究对象,选用自制一般资料调查表、主观幸福感量表简表(Subjective Well-being Scale for Chinese Citizens,SWBS-CC20)、Locke-Wollance婚姻调适测定(Locke-Wollance Marital Adjustment Test,LWMAT)对其进行调查。采用独立样本t检验和卡方检验比较夫妻主观幸福感和婚姻调适方面的差异,通过主客体互倚模型和Pearson分析法,分析夫妻双方主观幸福感对婚姻调适的影响。结果患者和配偶各自的主观幸福感均可以正向预测自身婚姻调适(β=0.67、0.71,P<0.01),即主体效应明显;同时,患者与配偶的主观幸福感均能正向预测对方的婚姻调适(β=0.47、0.46,P<0.01),即客体效应明显。结论克罗恩病患者及配偶的婚姻调适受自身及对方主观幸福感的交互影响,且主观幸福感与婚姻调适之间主体效应和客体效应显著。因此应将克罗恩病患者及配偶视为一个整体,关注夫妻双方的二元交互影响,积极探索以夫妻为中心的婚姻调适干预方案,对改善克罗恩病夫妻的心理适应有重要意义。
基金National Natural Science Foundation of China(No.41171320,41101349)National Innovation and Entrepreneurship Program(No.201210319025)
文摘This paper presents a new method for simulating the evolution of a gully head in a loess catchment with cellular automata(CA) based on the Fisher discriminant. The experimental site is an indoor loess catchment that was constructed in a fixed-intensity rainfall erosion test facility. Nine high-resolution digital elevation model(DEM) data sets were gathered by close range photogrammetry during different phases of the experiment. To simulate the evolution of the catchment gully head, we assumed the following. First, the 5th and 6th DEM data sets were used as a data source for acquiring the location of the catchment gully head and for obtaining spatial variables with GIS spatial analysis tools. Second, the Fisher discriminant was used to calculate the weight of the spatial variables to determine the transition probabilities. Third, CA model was structured to simulate the evolution of the gully head by iterative looping. The status of the cell in the CA models was dynamically updated at the end of each loop to obtain realistic results. Finally, the nearest neighbor, G-function, K-function, Moran′s I and fractal indexes were used to evaluate the model results. Overall, the CA model can be used to simulate the evolution of a loess gully head. The experiment demonstrated the advantages of the CA model which can simulate the dynamic evolution of gully head evolution in a catchment.
