1) fire frequence
火灾频数
1.
Based on the forest fire frequence of each month,the period of fire danger was divided into the period of security (the forest fire frequence is 0),the period of general fire danger(the forest fire frequence is less than or equal to 15%).
陕西森林火灾表现出明显的地域分布、年际分布和年内月分布规律，依据各月火灾频数值划分了火险期，“０”为安全期、≤１５％为一般火险期，＞１５％为高火险期。
3) disaster frequency
灾害频数
1.
Based on the population and the natural disaster database of counties in China, this paper adopts population density, which shows hazard-affected population, and disaster frequency, which reflects intensity of natural disasters, to establish the corresponding relationship between them.
依据灾害系统理论与中国县域人口、自然灾害数据库,采用反映人口承灾体的人口密度和反映自然灾害强度的频数,建立二者的对应关系,将中国划分为 15个不同的人口密度与综合自然灾害频数等级组合类型。
4) fire occurrence;fire concentration
火灾次数<林>
6) fire risk index method
火灾指数法
补充资料：宽频数码技术
充分利用存储卡的空间最大限度的记录活动影象及声音。（奥林巴斯专有技术）
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条