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相对日射资料的谱分析
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作者 徐金宝 《气象》 CSCD 北大核心 1994年第10期12-16,共5页
采用文献[1]所述的相对日射计,将它测得晴天连续日变化资料;用谱的统计方法,来分析研究大气边界层中湍涡活动。对1980年1月14和15日两天资料,用两种取样时段(总记录时间),分别进行谱的统计分析。结论;整个白天(8... 采用文献[1]所述的相对日射计,将它测得晴天连续日变化资料;用谱的统计方法,来分析研究大气边界层中湍涡活动。对1980年1月14和15日两天资料,用两种取样时段(总记录时间),分别进行谱的统计分析。结论;整个白天(8小时)和2小时内确有不同频率或周期的波动;以低频部分贡献最大(2/3总能量),其次高频部分一般为几分钟周期亦很明显。因而作者设想把它作为研究大气边界层中湍涡活动的一种探测工具,用它能测得水平尺度为100—1000m量级的大气介质密度“非均匀”的湍涡。对于边界层湍流结构,污染物扩散等问题的研究将发挥它的作用。 展开更多
关键词 相对日射 湍涡 谱分析 日射数据
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Distinguishing volcanic lithology using Self-Organizing Map 被引量:2
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作者 Ping ZHANG Baozhi PAN 《Global Geology》 2007年第1期74-77,共4页
Self-Organizing Map is an unsupervised learning algorithm.It has the ability of self-organization,self-learning and side associative thinking.Based on the principle it can identified the complex volcanic lithology.Acc... Self-Organizing Map is an unsupervised learning algorithm.It has the ability of self-organization,self-learning and side associative thinking.Based on the principle it can identified the complex volcanic lithology.According to the logging data of the volcanic rock samples,the SOM will be trained,The SOM training results were analyzed in order to choose optimally parameters of the network.Through identifying the logging data of volcanic formations,the result shows that the map can achieve good application effects. 展开更多
关键词 Self-Organizing Map volcanic rock lithology recognition logging data
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Global Solar Radiation Maps of Saudi Arabia
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作者 M. Mohandes S. Rehman 《Journal of Energy and Power Engineering》 2010年第12期57-63,共7页
This paper uses Abductive network to predict global solar radiation in any location in the Kingdom of Saudi Arabia (KSA) based on sunshine duration, month number, latitude, longitude, and altitude of the location. R... This paper uses Abductive network to predict global solar radiation in any location in the Kingdom of Saudi Arabia (KSA) based on sunshine duration, month number, latitude, longitude, and altitude of the location. Results indicate good agreement between measured and predicted GSR values for each of the 35 locations with known GSR values. Finally, the data from all available stations are used to train an abductive network to estimate the GSR values anywhere in the Kingdom based on latitude and longitude. GSR values are estimated using the developed method at 25 additional locations throughout the kingdom and used with the measured data from the 35 available measurement stations to draw a comprehensive contour map of GSR values for KSA. 展开更多
关键词 Abductory induction mechanism (AIM) group method of data handling (GMDH) solar radiation map renewable energy.
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