搜索结果: 61-75 共查到“理学 concentration”相关记录202条 . 查询时间(0.171 秒)
The universal distribution of halo interlopers in projected phase space. Bias in galaxy cluster concentration and velocity anisotropy?
Galaxies clusters general Cosmology miscellaneous (Cosmology) dark matter Galaxies halos Gravitational lensing weak Methods numerical
2010/3/9
When clusters of galaxies are viewed in projection, one cannot avoid picking up foreground/background interlopers, that lie within the virial cone (VC), but outside the virial sphere. Structural and k...
Peroxyacetic acid in urban and rural atmosphere: concentration, feedback on PAN-NOx cycle and implication on radical chemistry
Peroxyacetic acid rural atmosphere PAN-NOx cycle radical chemistry
2010/2/1
Peroxyacetic acid (PAA) is one of the most important atmospheric organic peroxides, which have received increasing attention for their potential contribution to the oxidation capacity of the troposphe...
Effect of carbonate ion concentration and irradiance on calcification in planktonic foraminifera
carbonate ion concentration and irradiance calcification planktonic foraminifera
2010/1/21
The effect of carbonate ion concentration ([CO32−]) on calcification rates estimated from shell size and weight was investigated in the planktonic foraminifera Orbulina universa and Globigerinoi...
Estimation of the Concentration of Dyes in Clear Solutions Using a Digital Camera
Estimation Concentration Clear Solutions Digital Camera
2010/9/17
The RGB values obtained from a digital camera were employed for reconstruction of spectral data of transparent colored solutions. A capturing box was assembled, and a spectral dataset gathered from c...
Time-dependent Changes in Concentration of Two Clinically Used Acetylcholinesterase Reactivators (HI-6 and Obidoxime) in Rat Plasma Determined by HPLC Techniques after in vivo Administration
Time-dependent Changes Clinically Acetylcholinesterase Reactivators HPLC Techniques
2010/9/17
A simple and reliable HPLC method for determination of rat plasma levels of clinically used acetylcholinesterase (AChE) reactivators (HI-6 and obidoxime) is presented in our study. Separation was carr...
Constraining the concentration of the hydroxyl radical in a stratocumulus-topped marine boundary layer from sea-to-air eddy covariance flux measurements of dimethylsulfide
hydroxyl radical stratocumulus-topped marine boundary layer sea-to-air eddy covariance flux measurements
2009/12/31
The hydroxyl radical (OH) is an important oxidant in the troposphere due to its high reactivity and relative abundance. Measuring the concentration of OH in situ, however, is technically challenging. ...
Calculation of time of concentration for hydrologic design and analysis using geographic information system vector objects
time of concentration hydrologic design geographic information system vector objects
2009/12/4
Synthetic unit hydrographs are commonly used to estimate runoff from rainfall events in a hydrologic analysis. A key parameter required as part of any hydrologic analysis using a synthetic unit hydrog...
Impact of Chinese anthropogenic emissions on submicrometer aerosol concentration at Mt. Tateyama, Japan
Chinese anthropogenic emissions submicrometer aerosol concentration Mt. Tateyama Japan
2009/12/3
Rapid Asian economic development might engender secondary impacts of atmospheric aerosol particles over the western Pacific after conversion of gaseous pollutants such as SO2. To elucidate changes in ...
Ecosystem effects of CO2 concentration：evidence from past climates
Ecosystem effects past climates CO2 concentration
2009/12/3
Atmospheric CO2 concentration has varied from minima of 170–200 ppm in glacials to maxima of 280–300 ppm in the recent interglacials. Photosynthesis by C3 plants is highly sensitive to CO2 concentrat...
VOC measurements within a boreal forest during spring 2005: on the occurrence of elevated monoterpene concentrations during night time intense particle concentration events
VOC measurements boreal forest monoterpene concentrations
2009/11/19
In this study we present measurements of selected trace gases and aerosols made in a boreal forest during the BACCI-QUEST IV intensive field campaign in Hyytiälä, Finland in April 2005. Spri...
Time-scale invariant changes in atmospheric radon concentration and crustal strain prior to a large earthquake
Time-scale invariant changes atmospheric radon concentration crustal strain earthquake
2009/11/2
Prior to large earthquakes (e.g. 1995 Kobe earthquake, Japan), an increase in the atmospheric radon concentration is observed, and this increase in the rate follows a power-law of the time-to-earthqua...
An Evaluation of the Importance of Transmissivity,Head and Concentration Data for Contaminant Transport Modelling
Importance of Transmissivity Concentration Data Contaminant Transport Modelling
2009/10/27
The 3 basic data types of contaminant hydrology are examined by stochastic
modelling of a groundwater contamination case. The stochastic transport model,
which is of the Monte Carlo type, uses a num...
Comparison of Sediment Rating Curves Developed on Load and on Concentration
Sediment Rating Curves Load Concentration
2009/10/23
A sediment rating curve developed as a lincar regression on logged values
which is back-transformed must be corrected for the bias introduced by the log
transformation. This article shows that the v...
Concentration Data and Dimensionality in Groundwater Models:Evaluation Using Inverse Modelling
Concentration Data Groundwater Models Inverse Modelling
2009/10/23
A three-dimensional inverse groundwater flow and transport model that fits hydraulic-
head and concentration data simultaneously using nonlinear regression
is presented and applied to a layered sand...
SEDIMENT FLOW WITH HIGH CONCENTRATION AND ITS MOVEMENT BEHAVIOR
SEDIMENT FLOW HIGH CONCENTRATION MOVEMENT BEHAVIOR
2009/10/19
In the Yellow River, the annual average sediment discharge and the annual average sediment concentration are the highest in the world. The measured maximum concentration approaches 1600 kg/m3 in its t...