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基于协同克里金方法的环境温度分布对装配式小箱梁桥影响分析 被引量:2
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作者 杜元 蔡定鹏 范旭涛 《公路交通技术》 2021年第5期50-55,共6页
为研究区域环境温度分布及其对装配式小箱梁桥梯度温度影响,以江苏地区为例,采用协同克里金法在考虑高程的条件下对2016年和2017年全国2339个气象台站的逐日气温数据进行了不同气温分布插值分析,同时通过装配式小箱梁桥温度场实测试验验... 为研究区域环境温度分布及其对装配式小箱梁桥梯度温度影响,以江苏地区为例,采用协同克里金法在考虑高程的条件下对2016年和2017年全国2339个气象台站的逐日气温数据进行了不同气温分布插值分析,同时通过装配式小箱梁桥温度场实测试验验证,分析了环境温度与箱梁内梯度温度之间的关系。结果表明:1)江苏省内冬季平均气温南北地区的最大差异为5℃左右,日极值温差的南北地区差异为3.5℃;2)环境最高气温与箱梁梯度温度高低的相关性最高,据此,可通过环境日最高温度大致预测不同地区箱梁内梯度温度最大值。 展开更多
关键词 环境温度分布 装配式小箱梁桥 江苏地区 协同克里金法 空间插值
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高散热密闭空间环境通风降温的模拟分析 被引量:1
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作者 张家文 沈云鹏 沈恒根 《建筑热能通风空调》 2018年第2期71-75,共5页
针对高散热密闭空间环境通风降温问题,建立了对所设计通风降温系统进行预测的模拟试验模型。试验结果表明:采用全新风通风时,送排风量较大,空间环境温度场呈不均匀分布,部分空间环境温度超过设计温度上限。采用复合通风时,送排风量显著... 针对高散热密闭空间环境通风降温问题,建立了对所设计通风降温系统进行预测的模拟试验模型。试验结果表明:采用全新风通风时,送排风量较大,空间环境温度场呈不均匀分布,部分空间环境温度超过设计温度上限。采用复合通风时,送排风量显著下降,环境温度场得到明显改善,尤其是高发热设备附近空间环境温度下降更加显著。 展开更多
关键词 高散热密闭空间 降温通风 复合通风 环境温度分布 模拟分析
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Retrieval of urban land surface component temperature using multi-source remote-sensing data
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作者 郑文武 曾永年 《Journal of Central South University》 SCIE EI CAS 2013年第9期2489-2497,共9页
The components of urban surface cover are diversified,and component temperature has greater physical significance and application values in the studies on urban thermal environment.Although the multi-angle retrieval a... The components of urban surface cover are diversified,and component temperature has greater physical significance and application values in the studies on urban thermal environment.Although the multi-angle retrieval algorithm of component temperature has been matured gradually,its application in the studies on urban thermal environment is restricted due to the difficulty in acquiring urban-scale multi-angle thermal infrared data.Therefore,based on the existing multi-source multi-band remote sensing data,access to appropriate urban-scale component temperature is an urgent issue to be solved in current studies on urban thermal infrared remote sensing.Then,a retrieval algorithm of urban component temperature by multi-source multi-band remote sensing data on the basis of MODIS and Landsat TM images was proposed with expectations achieved in this work,which was finally validated by the experiment on urban images of Changsha,China.The results show that:1) Mean temperatures of impervious surface components and vegetation components are the maximum and minimum,respectively,which are in accordance with the distribution laws of actual surface temperature; 2) High-accuracy retrieval results are obtained in vegetation component temperature.Moreover,through a contrast between retrieval results and measured data,it is found that the retrieval temperature of impervious surface component has the maximum deviation from measured temperature and its deviation is greater than 1 ℃,while the deviation in vegetation component temperature is relatively low at 0.5 ℃. 展开更多
关键词 component temperature urban thermal environment multi-source remote sensing thermal infrared remote sensing
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Analysis method of thermal dam deformation 被引量:2
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作者 XU BaoSong LIU BeiBei +2 位作者 ZHENG DongJian CHEN Lan WU CongCong 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第6期1765-1772,共8页
Based on the internal temperature variation of a dam lagging behind the ambient temperature variation,the ambient temperature of continuous variation is disctetized,and the functional expression of the thermal displac... Based on the internal temperature variation of a dam lagging behind the ambient temperature variation,the ambient temperature of continuous variation is disctetized,and the functional expression of the thermal displacement component of the dam caused by single instantaneous temperature variation is obtained.Considering the temporal and spatial distribution law of the ambient temperature and its relation with air and water temperature,the function is expanded into a Taylor series.As a result,the improved thermal displacement component expression for a dam monitoring model is obtained. 展开更多
关键词 concrete dam thermal effect thermal displacement component safety monitoring model
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