TI:Application of the Round Distribution Method to Probe the Seasonal Change of Flies
AU:SHANG Wenxu , HAI Xiuping , QIN Fengcheng.
AD: Health and A nti2Epidemic S tation of Chif eng City , Chif eng 024000 ,China
【Abstract】Objective To find out the peak day and the peak periods of the seasonal change in numbers of flies , so as to work out a scientific plan for controlling and preventing the flies. Methods The round distribution method was used to analyze the datum collected from the years of 199822000 to monitor the change in numbers of flies. Results It was showed that in Chifeng urban district ,the peak day of the seasonal change in flies was J uly 13th during the years of 199822000 ; but in the single year. It was J uly 20th in 1998 , J une 30th in 1999 and J uly 23th in 2000. The peak period of the seasonal change in flies were from May 25th to Sep 1st during the years of 199822000 , however ,in the single year. It was from May 31th to Sep 7th in 1998 , from May 15th to Aug 16th in 1999 and from J une 3th to Sep 12th in 2000. Conclusion The change in numbers of flies has a obvious seasonal feature during the years of 199822000. The round distribution method is suitable to analyzing the seasonal change in numbers of flies.
【Key words】 The round distribution method ; Flies ; Seasenal change
TI:Application of the Round Distribution Method to Probe the Seasonal Change of Flies
AU:SHANG Wenxu , HAI Xiuping , QIN Fengcheng.
AD: Health and A nti2Epidemic S tation of Chif eng City , Chif eng 024000 ,China
【Abstract】Objective To find out the peak day and the peak periods of the seasonal change in numbers of flies , so as to work out a scientific plan for controlling and preventing the flies. Methods The round distribution method was used to analyze the datum collected from the years of 199822000 to monitor the change in numbers of flies. Results It was showed that in Chifeng urban district ,the peak day of the seasonal change in flies was J uly 13th during the years of 199822000 ; but in the single year. It was J uly 20th in 1998 , J une 30th in 1999 and J uly 23th in 2000. The peak period of the seasonal change in flies were from May 25th to Sep 1st during the years of 199822000 , however ,in the single year. It was from May 31th to Sep 7th in 1998 , from May 15th to Aug 16th in 1999 and from J une 3th to Sep 12th in 2000. Conclusion The change in numbers of flies has a obvious seasonal feature during the years of 199822000. The round distribution method is suitable to analyzing the seasonal change in numbers of flies.
【Key words】 The round distribution method ; Flies ; Seasenal change
