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hydrological events
相关语句
  水文事件
     HYDROLOGICAL EVENTS RECORDED IN THE HOLOCENE SOIL IN GUANZHONG AREA, CHINA
     关中东部地区全新世土壤发育及记录的水文事件
短句来源
  “hydrological events”译为未确定词的双语例句
     This paper describes that the curve fitting method widely used in China can be used to estimate the parameters in the canonical expansion model and to present the skew properties of hydrological events.
     本文重点论述如何将我国常用的适线法用于估计正则展开模型的参数并使该模型反映径流的偏态特性。
短句来源
     It combines at site and regional information to infer probabilities of extreme hydrological events.
     它把单站信息和地区信息有机地结合在一起去推求设计洪水。
短句来源
  相似匹配句对
     Events
     事件
短句来源
     EVENTS
     新闻事件
短句来源
     HYDROLOGICAL EVENTS RECORDED IN THE HOLOCENE SOIL IN GUANZHONG AREA, CHINA
     关中东部地区全新世土壤发育及记录的水文事件
短句来源
     It combines at site and regional information to infer probabilities of extreme hydrological events.
     它把单站信息和地区信息有机地结合在一起去推求设计洪水。
短句来源
     The Development of Hydrological Model
     流域水文模型研究的进展
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  hydrological events
Data collected at three different spatial and temporal scales demonstrate the effects of hydrological events on 137Cs mobility.
      
'Episodes', which are periods of depressed alkalinity during hydrological events, have been studied mainly in southeastern Canada, and occur at all sites where there is sufficient time resolution of the observations, viz.
      
The Bavarian Alps region is strongly affected by various natural hazards, mainly hydrological events (floods, debris flows), geomorphic/geological events (landslides, rock falls), and avalanches.
      
Geomorphological consequences of fraquent and infrequent rainfall and hydrological events in Pyrennez Mountains of Spain
      
The observed variations were related to different groundwater levels and hydrological events (rises in groundwater), the vegetation types and the human practices (cutting, ploughing).
      
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This paper describes that the curve fitting method widely used in China can be used to estimate the parameters in the canonical expansion model and to present the skew properties of hydrological events. The feasibility of the model in practice has been illustrated and its advantages and disadvantages are also discussed in this paper.

本文重点论述如何将我国常用的适线法用于估计正则展开模型的参数并使该模型反映径流的偏态特性。同时,通过实例说明了该模型在实用中是可行的,最后指出了它的优缺点。

The Bayesian method is a special method in flood frequency analysis. It combines at site and regional information to infer probabilities of extreme hydrological events.It is different from traditional methods in flood freque- ncy analysis.It considers the parameter vector θ as the random vector with a distribution f″(θ).The expectation of θ provides Bayesian point esti- mates of the parameters.The distribution of f(x/θ) weighted by f″(θ) forms the Bayesian distribution of x. The pdf of prior is a key concept...

The Bayesian method is a special method in flood frequency analysis. It combines at site and regional information to infer probabilities of extreme hydrological events.It is different from traditional methods in flood freque- ncy analysis.It considers the parameter vector θ as the random vector with a distribution f″(θ).The expectation of θ provides Bayesian point esti- mates of the parameters.The distribution of f(x/θ) weighted by f″(θ) forms the Bayesian distribution of x. The pdf of prior is a key concept in the Bayesian approaches. Prior information can be “borrowed” from similar catchments using regression ana- lysis A case study of inference of flood quantiles for Mundeni river at Nilobe, Srilanka is presented to illustrate Bayesian methods.The results of analysis were satisfactory.

贝叶斯方法是一种特殊的洪水频率分析的方法。它把单站信息和地区信息有机地结合在一起去推求设计洪水。贝叶斯方法认为参数向量θ是具有密度函数 f″(θ)的随机向量。θ的数学期望即为贝叶斯点估计,由 f″(θ)加权的 f(×/θ)构成了 x 的贝叶斯分布。本文用贝叶斯方法对 Mundeni Rru 河上的 Nilobe 站进行洪水频率分析,分析的结果是令人满意的。

More and more intensified dust storms and dust deposition currently over the Loess Plateau of China provide analog for understanding the monsoonal climatic change and reconstruction of the Holocene environment in this semi-arid zone. Thick profiles of the Holocene loess-palaeosol sequence were found on the Zhouyuan loess tableland in the western Guanzhong Basin, Shaanxi Province. Detailed stratigraphic and pedological observations were made in the profile during the filed work. The fragments of the Neolithic...

More and more intensified dust storms and dust deposition currently over the Loess Plateau of China provide analog for understanding the monsoonal climatic change and reconstruction of the Holocene environment in this semi-arid zone. Thick profiles of the Holocene loess-palaeosol sequence were found on the Zhouyuan loess tableland in the western Guanzhong Basin, Shaanxi Province. Detailed stratigraphic and pedological observations were made in the profile during the filed work. The fragments of the Neolithic cultural remains identified in the profile provide chronological control in the sequence. Multi-disciplinary analyses, including magnetic susceptibility, total Fe, grain-size and total organic carbon, carried out in laboratory show that Holocene climate has been highly variable in this environmental sensitive region. Several important climatic and hydrological events are recorded in this Holocene profile. A flood phase was identified between 9 000~8 800a BP (cal.) during the climatic amelioration in the beginning of the Holocene. The flood was from the uplifted pediment of the Beishan Mountains on the north. The Holocene Megathermal (climatic optimum) was identified between 8 500~3 100a BP,during which policyclic cinnamon soils were developed on the loess tableland. An abrupt climatic shift from humid to dry conditions took place at about 6 000a BP, therefore, a remarkable climatic aridity phase was found between 6 000~5 000a BP. The Holocene Megathermal (climatic optimum) was thus split into two main periods (8 500~6 000a BP and 5 000~3 100a BP) with warm-wet climate. The earlier period was more intensive in its climatic warmness and humidity. This means the Holocene Megathermal was not constant and stable as thought in the past. Another climatic shift was identified at about 3 100a BP. The increase in climatic aridity since then has caused intensified dust storms and acceleration of dust accumulation. Because of the largely decreased precipitation, the deficit soil moisture and intense dust deposit has thus caused soil deterioration on the loess tableland. At the present, a layer of about 0.5~0.8m thick loess has blanketed the landscape on the loess tableland. The present ploughed topsoil is only the top part of this recently accumulated eolian loess sediment. This topsoil is rather poorly developed compared with the Holocene palaeosol S 0 in the middle part of the profile. These results are very important for understanding of the regional response to global change in the semi-humid to semi-arid zone within the middle reaches of the Yellow River drainage basin.

通过对陕西歧山黄土剖面地层学和土壤学研究 ,磁化率、全铁、粒度、CaCO3 和TOC测定分析 ,发现在全新世的全球性“大暖期”即将到来之前 ,黄土台塬面有洪水发生。在全新世大暖期当中 ,季风气候有明显的波动变化。尤其是在 6 0 0 0aBP前后季风气候转折 ,形成了 6 0 0 0~ 5 0 0 0aBP显著的干旱阶段。这使得全新世大暖期分裂成为两个主要的温暖湿润阶段。各项气候代用指标显示 85 0 0~ 6 0 0 0aBP是大暖期中最为温暖湿润的时期。在大约 310 0aBP季风格局发生变化 ,气候向着干旱化发展 ,全新世的成壤期为黄土堆积期所取代。这些事实对于我们客观地评价半湿润 -半干旱地区的季风气候对于全球变化的响应规律具有重要的科学意义。

 
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