搜索结果: 121-135 共查到“理学 techniques”相关记录194条 . 查询时间(0.187 秒)
Hydrochemistry in Geothermal Investigations in Iceland Techniques and Applications
Hydrochemistry Geothermal Investigations Iceland Techniques Applications
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2009/10/28
The role of hydrochemistry in geothermal exploration and development is
described. During the surface exploration phase hydrochemistry is particularly
useful in delineating regional ground-water mov...
Estimating the Variance of Airborne Snow Water Equivalent Estimates Using Computer Simulation Techniques
Airborne Snow Water Equivalent Estimates Simulation Techniques
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2009/10/27
Estimates of snow water equivalent derived from measurements of the attenuation
of terrestrial gamma radiation vary as a function of several known sources
of error. In this study, a computer simulat...
A Review of Techniques used by Canada and other Northern Countries for Measurement and Computation of Streamflow under Ice Conditions
Northern Countries Measurement Computation Ice Conditions
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2009/10/26
In Canada, Water Survey of Canada, a division of the Water Resources Branch
of Environment Canada, is responsible for the collection and processing of data
from more than 3,300 active streamflow, wa...
GROUNDWATER QUALITY ASSESSMENT OF A COASTAL AQUIFER USING GEOELECTRICAL TECHNIQUES
GROUNDWATER QUALITY GEOELECTRICAL TECHNIQUES COASTAL AQUIFER
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2009/10/19
Geoelectrical measurements using the Vertical Electrical Sounding (VES) method are well suited to the investigation of alluvial aquifers with large resistivity contacts. They have also been commonly u...
Review of prediction techniques on hydrodynamic impact of ships
review prediction techniques hydrodynamic impact
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2011/9/13
This paper presents the survey and assessment of the estimation techniques on hydrodynamic impact. The description and definition of hydrodynamic impact are presented, and the categorization of predic...
Railway Construction Techniques Adapting to Climate Warming in Permafrost Regions
Qinghai-Tibet Railway climate warming railway construction
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2009/8/28
The climate warming, which has an evident effect on the warm/ice-rich permafrost, should be considered in the engineering design of the Qinghai-Tibet Railway in permafrost areas. Based on the rule men...
Net community production of oxygen derived from in vitro and in situ 1-D modeling techniques in a cyclonic mesoscale eddy in the Sargasso Sea
Net community production oxygen vitro situ 1-D modeling techniques Sargasso Sea
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2010/1/20
It has been proposed that the disagreement traditionally reported between in vitro incubation and in situ estimates of oxygen net community production (NCP) could be explained, at least partially, by ...
A comparative analysis of two wind velocity retrieval techniques by using a single Doppler radar
Velocity Azimuth Display Atmospheric Boundary Layer Atmospheric Boundary Layer
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2009/7/22
This study compares the theoretical basis of the two wind velocity retrieval methods, Velocity Azimuth Display (VAD) and Velocity Area Display (VARD) by using data obtained by a single Doppler radar. ...
Inter-comparison of four different carbon monoxide measurement techniques and evaluation of the long-term carbon monoxide time series of Jungfraujoch
carbon monoxide measurement techniques long-term carbon monoxide time series Jungfraujoch
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2009/6/16
Despite the importance of carbon monoxide (CO) for the overall oxidative capacity of the atmosphere, there is still considerable uncertainty in ambient measurements of CO. To address this issue, an in...
Preferential transport of water and 131Iodide in a clay loam assessed with TDR-techniques and boundary-layer flow theory
clay loam soil moisture variations boundary-layer flow
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2009/6/8
Rapid soil moisture variations were measured with TDR equipment at five depths ranging from 0.1 to 0.9 m during five consecutive infiltration experiments under ponding. Each time, 27 mm of water were ...
Integrating GPR and CCRI techniques：Implications for the identification and mapping of ground ice on Mars
ground ice identification and mapping Mars
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2009/6/1
Our results show that GPR and CCRI techniques effectively complement each other by resolving different characteristics of the subsurface. While GPR clearly showed the subsurface structures and interfa...
ARTIFICIAL ADJUSTMENT OF FLOWER PERIOD AND HYBRIDIZING TECHNIQUES OF AMORPHOPHALUS KONJAC
Amorphophallus konjac artificial adjustment crossbreeding
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2009/5/31
Under natural conditions, the four-to-five-year-old Plants of A. konjac bloom in April. By crossing with A. cor-rugatus, normal hybrid seeds were harvested. When konjac corms with flower buds were sto...
Intercomparison of ammonia measurement techniques at an intensively managed grassland site（Oensingen, Switzerland）
ammonia measurement techniques managed grassland site Switzerland
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2009/5/6
As part of a field campaign in the framework of the NitroEurope project, three different instruments for atmospheric ammonia (NH3) measurements were operated side-by-side on a managed grassland site i...
Suitability of soil bioengineering techniques in Central America：a case study in Nicaragua
soil bioengineering techniques Central America
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2009/5/6
In the last few years "D. I. A. F." (Department of Agriculture and Forestry Engineering of Florence University), has been testing the effectiveness of soil bioengineering techniques in Central America...
Comparison of Artificial Intelligence Techniques for river flow forecasting
Artificial Neural Network Adaptive Neuro Fuzzy Inference System Generalized Regression Neural Networks
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2009/4/28
The use of Artificial Intelligence methods is becoming increasingly common in the modeling and forecasting of hydrological and water resource processes. In this study, applicability of Adaptive Neuro ...