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胶东牟平发云夼金矿区地球物理综合找矿研究 被引量:7
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作者 曾庆栋 沈远超 +4 位作者 刘铁兵 石昆法 王家法 任曙光 初善东 《湘潭矿业学院学报》 2001年第4期17-19,共3页
发云夼金矿产于中生代胶莱盆地东北边缘 ,金矿体产于盆地边缘次级滑动断层带中 ,是一层间滑动角砾岩型金矿床 金矿区开展的伽玛能谱测量结果表明 ,该类型金矿化具有明显的K/U参数异常 ,反映了中低温矿化的特点 ,根据地表圈定的异常确... 发云夼金矿产于中生代胶莱盆地东北边缘 ,金矿体产于盆地边缘次级滑动断层带中 ,是一层间滑动角砾岩型金矿床 金矿区开展的伽玛能谱测量结果表明 ,该类型金矿化具有明显的K/U参数异常 ,反映了中低温矿化的特点 ,根据地表圈定的异常确定了发云夼金矿隐伏矿化的相对部位 ,在此基础上进行了CSAMT技术研究 ,确定了隐伏金矿体在地下的具体部位 ,展示了发云夼金矿良好的成矿前景 目前 ,牟平金矿已在相应的CSAMT异常部位探到金矿体 图 3 ,参 展开更多
关键词 伽玛能谱测量 CSAMT 次数断层 隐伏矿床 发云夼式金矿床 找矿方法 成矿前景
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Application of uncertain type of AHP to condition assessment of cable-stayed bridges 被引量:15
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作者 黄侨 任远 林阳子 《Journal of Southeast University(English Edition)》 EI CAS 2007年第4期599-603,共5页
In order to guarantee the safety service and life-span of long-span cable-stayed bridges, the uncertain type of analytic hierarchy process (AHP) method is adopted to access the bridge condition. The correlative theo... In order to guarantee the safety service and life-span of long-span cable-stayed bridges, the uncertain type of analytic hierarchy process (AHP) method is adopted to access the bridge condition. The correlative theory and applied objects of uncertain type of AHP are introduced, and then the optimal transitive matrix method is chosen to calculate the interval number judgment matrix, which makes the weights of indices more reliable and accurate. Finally, with Harbin Songhua River Cable-Stayed Bridge as an example, an index system and an assessment model are proposed for the condition assessment of this bridge, and by using uncertain type of AHP, the weights of assessment indices are fixed and the final assessment results of the bridge are calculated, which proves the feasibility and practicability of this method. The application of this assessment method can provide the scientific basis for maintenance and management of long-span cable-stayed bridges. 展开更多
关键词 cable-stayed bridge condition assessment uncertain type of analytic hierarchy process interval number judgment matrix
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Intraretinal layer segmentation and parameter measurement in optic nerve head region through energy function of spatial-gradient continuity constraint
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作者 CHEN Zai-liang WEI Hao +4 位作者 SHEN Hai-lan PENG Peng YUE Ke-juan LI Jian-feng ZOU Bei-ji 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第8期1938-1947,共10页
For the diagnosis of glaucoma,optical coherence tomography(OCT)is a noninvasive imaging technique for the assessment of retinal layers.To accurately segment intraretinal layers in an optic nerve head(ONH)region,we pro... For the diagnosis of glaucoma,optical coherence tomography(OCT)is a noninvasive imaging technique for the assessment of retinal layers.To accurately segment intraretinal layers in an optic nerve head(ONH)region,we proposed an automatic method for the segmentation of three intraretinal layers in eye OCT scans centered on ONH.The internal limiting membrane,inner segment and outer segment,Bruch’s membrane surfaces under vascular shadows,and interaction of multiple high-reflectivity regions in the OCT image can be accurately segmented through this method.Then,we constructed a novel spatial-gradient continuity constraint,termed spatial-gradient continuity constraint,for the correction of discontinuity between adjacent image segmentation results.In our experiment,we randomly selected 20 B-scans,each annotated three retinal layers by experts.Signed distance errors of?0.80μm obtained through this method are lower than those obtained through the state-of-art method(?1.43μm).Meanwhile,the segmentation results can be used as bases for the diagnosis of glaucoma. 展开更多
关键词 surface segmentation parameter measurement optical coherence tomography optic nerve head spatial-gradient continuity constraints
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