Lightning detection in British Columbia: An example of using system operation at unknown reliability to estimate component reliability

Lightning data collected over three dry seasons from the detection system operated by the British Columbia Ministry of Forests were analyzed to estimate the distribution of lightning signal strength and component detection efficiencies. The analysis was based on more than 165,000 lightning-strike records, where component detectors served both as lightning finders and as data collectors for evaluating the performance of other component detectors in the network. In spite of the unusual feature of this application involving a system evaluating itself, much was revealed to identify weaknesses and suggest improvements. A postanalysis system-modification update is included.     

Robust two parameter ridge M-estimator for linear regression

The problem of multicollinearity and outliers in the data set produce undesirable effects on the ordinary least squares estimator. Therefore, robust two parameter ridge estimation based on M-estimator (ME) is introduced to deal with multicollinearity and outliers in the y-direction. The proposed estimator outperforms ME, two parameter ridge estimator and robust ridge M-estimator according to mean square error criterion. Moreover, a numerical example and a Monte Carlo simulation experiment are presented.     

高校基金会新媒体应用问题研究——以39所一流大学建设高校为例

微信、微博等新媒体平台自问世以来,凭借传播速度快、互动性强等特点,在宣传推广、交流传播等方面具有显著优势,迅速被包括高校基金会在内的各类组织所采用。高校基金会作为特殊的公益性组织,可以使用新媒体,提升公益项目推介、信息公开以及公开募捐等工作水平。然而,高校基金会的新媒体平台应用依然存在着活跃度与互动性不足以及应用战略缺...