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林火规律
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  fire regime
     STUDY ON FOREST FIRE REGIME OF HEILONGJIANG PROVINCEⅠ. FOREST FIRE SPATIAL AND TEMPORAL DYNAMICS AND STATISTICAL DISTRIBUTION
     黑龙江省林火规律研究Ⅰ.林火时空动态与分布
短句来源
     STUDY ON FOREST FIRE REGIME OF HEILONGJIANG PROVINCE Ⅱ.ANALYSIS ON FACTORS AFFECTING FIRE DYNAMICS AND DISTRIBUTIONS
     黑龙江省林火规律研究 Ⅱ.林火动态与格局影响因素的分析
短句来源
     STUDIES ON FIRE REGIME OF HEILONGJIANG PROVINCE Ⅲ.RELATIONSHIPS BETWEEN FOREST FIRES AND FOREST TYPES ON A LARGE SCALE
     黑龙江省林火规律研究 Ⅲ.大尺度水平林火与森林类型之间的关系研究
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  “林火规律”译为未确定词的双语例句
     The results showed that the 20 years fire history can be divided into two phases: low fire occurrence stage before 1987 and high fire occurrence stage after 1987 The annual fire number and anthropogenic fire number are positively correlated with similar spectrum cycles of 2 3, 4 6 and 16 years and a size spectrum cycle of 6 years.
     结果表明 ,黑龙江省林火可分为 1980~ 1987年的多发段和 1988年以后的低发段。 人为火与总林火规律相似 :次数频谱周期为 16、4 5a和 2 3a ,面积频谱周期为 6a。
短句来源
  相似匹配句对
     deterioration law
     退化规律
短句来源
     The Rules of Attraction
     吸引的规律
短句来源
     STUDY ON FOREST FIRE REGIME OF HEILONGJIANG PROVINCEⅠ. FOREST FIRE SPATIAL AND TEMPORAL DYNAMICS AND STATISTICAL DISTRIBUTION
     黑龙江省林火规律研究Ⅰ.林火时空动态与分布
短句来源
     Forest Fire and Soil and Water Loss
     林火与水土流失
短句来源
     STUDY ON FOREST FIRE REGIME OF HEILONGJIANG PROVINCE Ⅱ.ANALYSIS ON FACTORS AFFECTING FIRE DYNAMICS AND DISTRIBUTIONS
     黑龙江省林火规律研究 Ⅱ.林火动态与格局影响因素的分析
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  fire regime
This paper compares vegetation change, fire regime, erosion and eutrophication rates between the European period and the recent prehistoric past in two lake systems on the south coast of New South Wales.
      
Effects of fertilizer application and fire regime on soil microbial biomass carbon and nitrogen, and nitrogen mineralization in
      
The data indicate that recruitment is episodic, but occurs more frequently under the current fire regime than amongst the canopy trees.
      
Stands that had experienced a moderate fire regime were positioned well below the self-thinning boundary in a distinct fire-thinning band of reduced major axis regression slope -0.26.
      
The effects of fire regime on legume reproduction in longleaf pine savannas: is a season selective
      
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The spatial and temporal dynamics and statistical distribution of forest fires in Heilongjiang province was studied here based on fire data of the province during 1980~1999 by means of GIS software. The results showed that the 20 years fire history can be divided into two phases: low fire occurrence stage before 1987 and high fire occurrence stage after 1987 The annual fire number and anthropogenic fire number are positively correlated with similar spectrum cycles of 2 3, 4 6 and 16 years and a size spectrum...

The spatial and temporal dynamics and statistical distribution of forest fires in Heilongjiang province was studied here based on fire data of the province during 1980~1999 by means of GIS software. The results showed that the 20 years fire history can be divided into two phases: low fire occurrence stage before 1987 and high fire occurrence stage after 1987 The annual fire number and anthropogenic fire number are positively correlated with similar spectrum cycles of 2 3, 4 6 and 16 years and a size spectrum cycle of 6 years. Annual areas burned by lightning caused fires is irrelevant to its number, the former cycles every 9 1 years and the later every 9 1 and 3 0 years in each spectrum. Fires occur mainly in April and May with more burned areas in March and April for anthropogenic fires and May for lightning caused ones. The fires spatially distributed as a belt from northwest to southeast with 5 high fire occurrence regions and few burns in the west, southwest and northeast parts of the province. The fire size, averaged area expanding rate and burning time follow lognormal distribution with a self organizing character with respective fractal dimensions of 0 86、1 045 and 0 68 Discussion is made on fire cycles, self organizing characters and suitable frequency and intensity of human introduced fires in ecosystems. It is emphasized that although self organizing function links the spatial characters of fire with temporal ones, a lower limit exits when describing self organizing character with negative power functions and a formula for calculating the limit is presented here. Comparison is also made between fire fractals of different regions.

根据黑龙江省 1980~ 1999年的林火资料 ,利用地理信息系统等工具 ,对黑龙江省林火时空动态和分布规律进行了研究。结果表明 ,黑龙江省林火可分为 1980~ 1987年的多发段和 1988年以后的低发段。人为火与总林火规律相似 :次数频谱周期为 16、4 5a和 2 3a ,面积频谱周期为 6a。雷击火次数频谱周期为 9 1a和 3 0a左右 ,面积频谱周期为 9 1a。总林火次数和面积显著正相关 ,雷击火的次数与面积不相关。林火主要发生在 4月、5月。人为火面积集中在 3月、4月 ,雷击火面积集中在 5月。林火由西北向东南呈条带状分布 ,西部、西南部和东北部林火较少。有 5个林火多发区。林火面积、平均蔓延速率、持续时间呈对数正态分布 ,具有自组织特点 ,分数维分别是 0 86、1 0 5和 0 6 8。对火频谱周期、自组织性进行了讨论 ,指出自组织函数将林火的时空特性结合在一起 ,采用负幂函数描述时存在适用下限并给出计算公式。对不同区域的自组织分数维进行了比较。对人为引入火烧的适宜强度和频度进行了简单探讨

 
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