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气候频率
相关语句
  climatic frequency
     The main conclusions are as follows:The climatic frequency of droughts and floods of various grades, which are 8%, 22%, 40%, 22%, 8%, roughly follows the normal distribution.
     1—5级的气候频率分别为8%、22%、40%、22%、8%。 各时期的旱涝分布不均,呈交替现象。
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  相似匹配句对
     Impacts of Climatic Factors on Dust Storm Frequency in the Inner Mongolia of China
     气候因子对内蒙古沙尘暴频率的影响
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     X—Band Microstrip Low Noise Frequency MuItiplier
     频率指示器
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     Impacts of Climate Change on Flood Frequencies and Peak Discharges
     气候变化对洪水频率和洪峰流量的影响
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     ,dry—cold climate;
     ,气候干冷 ;
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     ON FREQUENCIES
     频率
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Based on a chronicle of droughts and floods (1163-1884) as well as the raiufall records (1885-1977) in plum rains season (May-July), an investigation on the fluctuation of droughts and floods has been carried out. The main conclusions are as follows:The climatic frequency of droughts and floods of various grades, which are 8%, 22%, 40%, 22%, 8%, roughly follows the normal distribution. The droughts and floods appeared clusterly and alternately. The prominent cycles are 157, 91, 61, 47, 38, 30.9, 27, 21.8, 19.2,...

Based on a chronicle of droughts and floods (1163-1884) as well as the raiufall records (1885-1977) in plum rains season (May-July), an investigation on the fluctuation of droughts and floods has been carried out. The main conclusions are as follows:The climatic frequency of droughts and floods of various grades, which are 8%, 22%, 40%, 22%, 8%, roughly follows the normal distribution. The droughts and floods appeared clusterly and alternately. The prominent cycles are 157, 91, 61, 47, 38, 30.9, 27, 21.8, 19.2, 14.9, 11, 9.7, 2.7, 6 and 5-year etc.Besides, the droughts and floods are compared with the solar activity cycle. Finally, the trend for the coming 22-years is discussed.

利用1163—1977年的史料和雨量资料对长江下游地区梅雨期(5—7月)的旱涝情况进行分析,得到如下结论。 (1)各级旱涝的气候频率近于正态分布;1—5级的气候频率分别为8%、22%、40%、22%、8%。各时期的旱涝分布不均,呈交替现象。全期分为多旱期(1200—1285),多涝期(1286—1522)和转旱期(1523—1977),在这三个时期内都存在旱涝的“群发倾向”。利用自回归功率谱(AR模式)方法得显著周期为157、91、61、47、38、30.9、27、21.8、19.2、14.9、11、9.7、7.7、6和5年等。 (2)统计结果证实太阳活动最大年和最小年附近的旱涝次数为最多,而在最大年附近(M—1、M)涝的次数比旱的多,在最小年附近(m—1、m、m+1)旱的次数比涝的多。用同调谱分析,太阳黑子对梅雨旱涝有着一定影响,但关系不十分显著。

The cotton-producing area in Guanzhong of Shaanxi province is one of the old cotton-producing areas in China.Under the climatic condition with normal solar radiation and heat in this area,if the suitable varieties are selected and the advanced cultivation techniques are used,the maximum potential cotton lint output will reach above 200 jin per mu.But the dist- ribution of rainfall is uneven in the cotton growing and developing stages, and September and October in particular are such a period when cotton bol...

The cotton-producing area in Guanzhong of Shaanxi province is one of the old cotton-producing areas in China.Under the climatic condition with normal solar radiation and heat in this area,if the suitable varieties are selected and the advanced cultivation techniques are used,the maximum potential cotton lint output will reach above 200 jin per mu.But the dist- ribution of rainfall is uneven in the cotton growing and developing stages, and September and October in particular are such a period when cotton bol -ls mature and open that the climate is an unbroken spell of wet weather. In recent 30 years the climatic frequency of waterlogging has increased with the result that the average cotton yield per mu has been very low. Accordingly,the principal objective of the basic technical measures of high and stable yielding cultivation is to overcome the unuiformity of rainfall, such as,levelling land/deep ploughing/increasing application of organic and phosphate fertilizers/rational irrigation and drainage/selection of early- maturing varieties and adoptation of early-maturing cultivation techniques /utilization of plastic films in cotton cultivation/rush-picking and drying the old bolls in the climate of cloudy and drizzly for days on ends.

陕西关中棉区是全国的老棉区之一。在常年光、热气候条件下,选用适宜的品种和先进的栽培技术,每亩皮棉最大生产潜力在200斤以上。但是,棉花生育期间雨量分布不匀,特别是棉铃成熟吐絮期——9、10月份常有连阴雨,近30多年来涝灾气候频率还有所增加,致使棉花平均亩产水平很低。因此,高产稳产的基本栽培技术措施的主要目标,应是克服雨量的不均衡性,例如:平整土地,深耕,增施有机肥和磷肥,合理灌溉与排水,早熟品种与早熟栽培技术,地膜复盖栽培以及秋涝情况下抢摘、烘炕老桃等。

The 1951-1999 measurements are employed to investigate in depth the climatic change features of yearly and seasonal disasters, arriving at the main results as follows: a) steady increase occurs in summer rainfall in contrast to reduction, to varying degree, in other seasons, particularly in autumn; b) the possibility is great (roughly 80 %) for large-scale floods and/or droughts to be in the province on an annual basis. It is evident that the seasonal disasters hit the study region each year after 1985; c) the...

The 1951-1999 measurements are employed to investigate in depth the climatic change features of yearly and seasonal disasters, arriving at the main results as follows: a) steady increase occurs in summer rainfall in contrast to reduction, to varying degree, in other seasons, particularly in autumn; b) the possibility is great (roughly 80 %) for large-scale floods and/or droughts to be in the province on an annual basis. It is evident that the seasonal disasters hit the study region each year after 1985; c) the annual and seasonal calamities experience inter-decadal variation, and the climatic frequency of their occurrence shows noticeable change, especially in summer. The analyses from singular spectrum and maximum entropy spectrum techniques reveal that precipitation on a seasonal (summer and autumn) and an annual basis displays remarkable secular trend change with some 10-year periods found and, in contrast, about 2-year oscillations are particularly pronounced for the winter precipitation.

用1951~1999年资料详细研究了浙江省的年、季的旱、涝气候变化特征。主要结果:浙江省夏季降水量表现出稳定的增加,其他季节(特别是秋季)的降水有不同程度的减少。每年在浙江省出现大范围旱(或涝)的可能性很大(约80%)。1985年以后浙江每年都要发生大范围的季节性的旱涝。浙江省年、季降水量旱涝有年代际变化。旱、涝发生的气候频率己经有了明显的变化,特别是夏季。奇异谱分析与最大熵谱分析的结果表明夏季、秋季与年的降水量有明显的长期趋势变化,它们还有10年左右的周期,而冬季降水的2年周期振荡特别明显。

 
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