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regional forecasting
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     The results show that Chebyshev polynomials are applicable to regional forecasting of crop yields.
     结果表明:车贝雪夫多项式可用于区域产量预报。
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     For the need of daily weather prediction and an urgent call for the definition of ambient field as the initial input of regional forecasting model,the problem of truncation error in T106 dataset stored and displayed in MICAPS is discussed and indeed has been solved. The image snapshot effects of the spectra model T106 of China were also quantitatively analyzed,the ECMWF model,the JAPAN model and the KWBC Model,as well as their levels of statistic errors.
     围绕日常天气预报的需求和为区域数值天气预报模式定义天气背景场和初值场的需要 ,针对 92 1 0工程的MICAPS系统中T1 0 6谱模式的客观分析场和预报场的数据存储及显示中的截断误差问题 ,提出了改进的方案 ,并定量分析比较了T1 0 6、欧洲中心ECMWF、华盛顿KWBC和日本JAPAN数值模式对天气环流形势的“快照”效果和统计误差
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  相似匹配句对
     INTELLIGENT FORECASTING FOR THE REGIONAL ECONOMIC
     区域经济发展智能预测方法
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     RESEARCH ON FORECASTING REGIONAL ELECTRIC DEMAND
     地区电力需求预测研究
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     Regional Construction
     地区建造
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     On Scientific Forecasting
     论科学预测
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     REGIONAL TECTONOGEOCHEMISTRY
     区域构造(地球)化学
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  regional forecasting
Evaluations of MEDEX performance for both the onset and cessation of winter and summer winds are presented, and demonstrate that MEDEX has forecasting skill competitive with the US Navy's regional forecasting center in Rota, Spain.
      
This paper presents a new regional forecasting model, labelled MASST (macroeconomic, sectoral, social and territorial), built on a modern conceptualization of regional growth.
      
As state-level data are often subject to less measurement error, and are also more complete and timely, this result should be encouraging to regional forecasting practitioners.
      
A regional forecasting technique is developed which combines national and local indicators to provide forecasts of local business activity.
      
Combining intersectoral flows and shift-share techniques: A hybrid regional forecasting model
      
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In this paper, the authors have described the applications of Chebyshev polynomials in forecasting the geographical distribution of meteorological yields of maize crop in the Central-Northern region of Liaoning Province. By using Chebyshev polynomials on irregular grids and basing on 60 candidate predictors for atmospheric circulations 12 statistical equations were obtained. By means of these equation, the meteorological yields for thirteen stations in this region were forecasted. The results show that Chebyshev...

In this paper, the authors have described the applications of Chebyshev polynomials in forecasting the geographical distribution of meteorological yields of maize crop in the Central-Northern region of Liaoning Province. By using Chebyshev polynomials on irregular grids and basing on 60 candidate predictors for atmospheric circulations 12 statistical equations were obtained. By means of these equation, the meteorological yields for thirteen stations in this region were forecasted. The results show that Chebyshev polynomials are applicable to regional forecasting of crop yields. We have also the opinion that Chebyshev polynomails can. be used in other fields of agrometeorological forecasting (such as phenological stage, and pest forecastings).

本文以辽宁省中北部地区玉米气象产量区域分布的预报为例,论述了车贝雪夫多项式在农业气象预报中的若干应用。作者用不规则格点上的车贝雪夫多项式,以大气环流为候选预报因子,求得展开式系数依赖于4—6个因子的方程,并由此报出区域各县产量,绘出预报图,作试报检验。结果表明:车贝雪夫多项式可用于区域产量预报。最后讨论了此方法在农业气象预报其他领域(如发育期、病虫害预报)中的应用前景,指出车贝雪夫多项式用于生物学、地学预报中的意义。

The surface erosion and fluvial silt in upper reaches of Changjiang River were analyzed systematically. It was considered that the development of surface erosion in upper Changjiang was affected by unreasonable social economic activities such as the agricultural cultivation, forest and prairie exploitation,roads building,and capital construction and so on which enlarges the area of soil and water loss in upper Changjiang River. The author also analyzed and forecasted that the erosion amount would reduce to 1.022...

The surface erosion and fluvial silt in upper reaches of Changjiang River were analyzed systematically. It was considered that the development of surface erosion in upper Changjiang was affected by unreasonable social economic activities such as the agricultural cultivation, forest and prairie exploitation,roads building,and capital construction and so on which enlarges the area of soil and water loss in upper Changjiang River. The author also analyzed and forecasted that the erosion amount would reduce to 1.022 billion tons from present 1.568 billion tons in the end of this century based on recent steps. By regional forecasting the effect of surface erosion on fluvial silt, it was believed that the surface erosion could be reduced largely by harness the upper Changjiang River,but the fluvial silt may be not changed a lot. The silt amount of water carry will range from 0.488 to 0.502 billion tons at Yichang hydrometric station in 2000.

本文系统的分析研究了长江上游地面侵蚀和河流泥沙两个系统。认为长江上游地面侵蚀的发展主要受人类在农业耕作、林业开采、草原开发、修路、基建等方面不合理的社会经济活动的影响,导致长江上游水土流失面积不断扩大。同时作者还分析和预测了在禁止各种新的破坏情况下,预计到2000年按现有的治理速度,上游地区侵蚀量将由15.68亿t降到10.22亿t。分析表明:长江上游地区输移比远小于1,且受流域面积、地质地貌、地面物质组成及人为活动等多种因素的影响。通过分区预测地面侵蚀对河流泥沙的影响,认为今后在上游通过治理,使地面侵蚀量虽有较大减少,但河流泥沙的变化仍然较小,到2000年宜昌站平均悬移质输沙量将在4.88~5.02亿t之间变化。

It was the first time to conduct flood forecasting during a construction period at the upstream of the Minjiang river. In the upstream areas, there were not enough hydrological stations to support forecasting.Moreover, sparsely populated areas, poor transportation and communication conditions made the establishment of hydrologic stations very difficult. To forecast floods during the construction period, a regional forecasting, based on a well communicated station which was used as an inflow control station,...

It was the first time to conduct flood forecasting during a construction period at the upstream of the Minjiang river. In the upstream areas, there were not enough hydrological stations to support forecasting.Moreover, sparsely populated areas, poor transportation and communication conditions made the establishment of hydrologic stations very difficult. To forecast floods during the construction period, a regional forecasting, based on a well communicated station which was used as an inflow control station, was applied instead of a large river basin forecasting. This method has fully utilized the existing nationalhydrologic station networks, and combined with the regional hydrologic features──4-8 hours' converge time needed by the nearest main rainy area. This overcame the above-mentioned difficulties, saved project investment, and meanwhile, optimized the scheme of flood forecasting.

岷江上游开展施工期洪水预报尚属首次,且站点不足,人烟稀少,交通不便,设站困难,通讯条件差。为保证施工期洪水预报工作的开展,充分利用现有国家水文站网,并结合本地区水文特点,在考虑当主雨区最近时其汇流时间约为4~8h这一汇流时间的前提下,尽可能选用通讯条件良好的上游预报根据站作为来水控制站,可不作大流域预报而作区间预报,这就克服了上述困难,不仅为建设单位节省了投资,同时也优化了洪水预报方案。

 
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