【摘要】 根据甘肃省岷县1959～1998年的年雹日和受灾面积历史资料,用统计学方法分析检验高炮防雹效果。经序列、wolch检验发现,高炮防雹后"年雹日"减少32.8%,"受灾面积"减少33.6%,显著性水平达到0.05,可信度达95%以上。更多还原

【Abstract】 According to the annual hail day and disaster area historical data of Min Xian from 1959 to 1998, this paper analyzed the effect of artificial anti-hail with statistical method.The results show that yearly hail day and disaster area reduced 32.8% and 33.6% respectively after the artificial anti-hail, Getting remarkable level up to 0.05, the credibility is more than 95%.更多还原