期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
^(99m)Tc-MIBI心肌核素显像与血浆BNP联检对DM2并发CHD诊断的价值 被引量:1
1
作者 李建高 樊必夫 《放射免疫学杂志》 CAS 2013年第3期257-258,共2页
目的:探讨99mTc-MIBI心肌核素显像与血浆BNP联检对2型糖尿病(DM2)并发冠心病(CHD)的诊断价值。方法:对109例DM2患者进行心肌核素显像检查并用放射免疫分析血浆BNP水平,分别与正常对照组比较。结果:心肌缺血组51例,心肌梗死22例,其中无... 目的:探讨99mTc-MIBI心肌核素显像与血浆BNP联检对2型糖尿病(DM2)并发冠心病(CHD)的诊断价值。方法:对109例DM2患者进行心肌核素显像检查并用放射免疫分析血浆BNP水平,分别与正常对照组比较。结果:心肌缺血组51例,心肌梗死22例,其中无症状心肌缺血19例。心肌缺血及心肌梗死的BNP水平较正常对照组有明显的增高。结论:心肌核素显像联检血浆BNP水平对早期诊断DM2并发CHD具有重要的价值。 展开更多
关键词 2型糖尿病 冠心病 放射性核素显像 脑利钠肽
下载PDF
Remote Sensing Geological Exploration Model for Copper and Gold Deposits in the East Tianshan, Xinjiang 被引量:3
2
作者 ZHANGShoulin FUShuixing LIChunxia 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2004年第2期423-427,共5页
Based on the identification and enhancive processing of information about strata, structure, magmatite, and alteration in ore-concentrated area in the eastern Tianshan, an exploration mode of remote sensing geology is... Based on the identification and enhancive processing of information about strata, structure, magmatite, and alteration in ore-concentrated area in the eastern Tianshan, an exploration mode of remote sensing geology is established. The mode covers basic images composed of TM (7, 4, 1), Munsell space transformation for recognizing rock type, directional matched filtering for enhancing structures, multi-layer separating and extracting weak alteration information. It will provide a rapid and effective method for geological mapping and metallogenic prediction in this region. 展开更多
关键词 Eastern Tianshan image of rock type iron-bearing alteration hydroxy alteration remote sensing geology exploration
下载PDF
Microstructural Characteristics of Asphalt Concrete with Different Gradations by X-ray CT 被引量:5
3
作者 胡靖 钱振东 +1 位作者 LIU Yang XUE Yongchao 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第3期625-632,共8页
The main objective of this paper is to evaluate the effects of asphalt concrete types on the microstructural characteristics at high-temperature. Suspend-dense structure and Skeleton-dense structure were selected to i... The main objective of this paper is to evaluate the effects of asphalt concrete types on the microstructural characteristics at high-temperature. Suspend-dense structure and Skeleton-dense structure were selected to investigate the deformation of pavement at meso-scale. The internal microstructures of typical asphalt concretes, AC, SUP and SMA, were scanned by X-ray CT device, and microstructural changes before and after high-temperature damage were researched by digital image processing. Adaptive threshold segmentation algorithm(ATSA) based on image radius was developed and utilized to obtain the binary images of aggregates, air-voids and asphalt mastic. Then the shape and distribution of air-voids and aggregates were analyzed. The results show that the ATSA can distinguish the target and background effectively. Gradation and coarse aggregate size of asphalt mixtures have an obvious influence on the distribution of air-voids. The movements of aggregate particles are complex and aggregates with elliptic sharp show great rotation. The effect of gradation on microstructure during high-temperature damage promotes the research about the failure mechanism of asphalt concrete pavement. 展开更多
关键词 asphalt concrete microstructure gradation types X-ray CT digital image processing high-temperature deformation
下载PDF
Statistical Estimation of High-Resolution Surface Air Temperature from MODIS over the Yangtze River Delta,China 被引量:2
4
作者 Yi SHI Zhihong JIANG +1 位作者 Liangpeng DONG Suhung SHEN 《Journal of Meteorological Research》 SCIE CSCD 2017年第2期448-454,共7页
High-resolution surface air temperature data are critical to regional climate modeling in terms of energy balance,urban climate change,and so on.This study demonstrates the feasibility of using Moderate Resolution Ima... High-resolution surface air temperature data are critical to regional climate modeling in terms of energy balance,urban climate change,and so on.This study demonstrates the feasibility of using Moderate Resolution Imaging Spectroradiometer(MODIS)land surface temperature(LST)to estimate air temperature at a high resolution over the Yangtze River Delta region,China.It is found that daytime LST is highly correlated with maximum air temperature,and the linear regression coefficients vary with the type of land surface.The air temperature at a resolution of 1 km is estimated from the MODIS LST with linear regression models.The estimated air temperature shows a clear spatial structure of urban heat islands.Spatial patterns of LST and air temperature differences are detected,indicating maximum differences over urban and forest regions during summer.Validations are performed with independent data samples,demonstrating that the mean absolute error of the estimated air temperature is approximately 2.5°C,and the uncertainty is about 3.1°C,if using all valid LST data.The error is reduced by 0.4°C(15%)if using best-quality LST with errors of less than 1 K.The estimated high-resolution air temperature data have great potential to be used in validating high-resolution climate models and other regional applications. 展开更多
关键词 remote sensing surface air temperature land surface temperature land cover type Moderate Resolution imaging Spectroradiometer(MODIS)
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部