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SPACE-TIME ANALYSIS OF CRIME PATTERNS IN CENTRAL LONDON
Exploratory space-time analysis visualization crime analysis data mining space-time cube spatial scan statistics self-organizing map multi-resolution
2014/4/25
Crime continues to cast a shadow over citizen well-being in big cities today, while also imposing huge economic and social costs. Timely understanding of how criminality emerges and how crime patterns...
土壤中总氮与总磷含量的近红外光谱实时检测方法（Real-time Analysis of Soil Total N and P with Near Infrared Reflectance Spectroscopy）
近红外光谱 土壤总氮 土壤总磷
2009/11/3
以浙江省潮化盐土为研究对象，用近红外光谱分析技术探测土壤氮（N）和磷（P）的含量。从试验田采集6组土样，每组取20个样品，共计120个样品。利用均值法、卷积滤波确定最终光谱数据，然后采用偏最小二乘回归法（PLS）及最小二乘支持向量机（LS-SVM）分别建立了土壤总氮和总磷的近红外光谱模型，其中采用PLS所建模型的相关系数分别为0.9454（N）、0.9327（P），预测标准误差分别为0.0321（...