搜索结果: 46-60 共查到“知识库 理学 environment”相关记录241条 . 查询时间(0.233 秒)
Variations of Natural Soil Salinity in an Arid Environment Using Underground Watertable Effects on Salinization of Soils in Irrigated Perimeters in South Tunisia
Oasis Irrigation Water Superficial Water Table Salinity Drainage Tunisia
2013/3/11
In arid and semi-arid regions, salinity is a serious and chronic problem for agriculture. The aim of this study is to evaluate the hydromorphical and salinity risks, and to evaluate the relationship a...
3D geospatial modelling and visualization for marine environment: Study of the marine pelagic ecosystem of the south-eastern Beaufort Sea, Canadian Arctic
GIS Oceanography Visualization Spatial, Modelling Three-dimensional, Interpretation
2014/4/25
Geospatial modelling of the marine pelagic ecosystem is challenging due to its dynamic and volumetric nature. Consequently, conventional oceanographic spatial analysis of this environment is in a 2D e...
Mercury Emissions from a Coal-Fired Power Plant and Their Impact on the Nearby Environment
Mercury Coal-fired power plant Emission factor Atmospheric emission
2016/3/25
This study investigated Hg emissions from a coal-fired power plant (CFPP) and their impact on the nearby environment.
Atmospheric Hg concentrations were measured at sampling sites near a CFPP located...
Synchrotron based Transmission x-ray microscopy reveals smectite fine structure in an aqueous environment
Synchrotron Transmission x-ray microscopy reveals smectite fine structure aqueous environment
2012/3/30
The unusual behaviour of smectites, the ability to change volume when wetted (swelling) or dried (shrinking), make soil containing smectites very unstable and hazardous for the building industry due t...
Cantilever Structures’ Environment Symbiosis Technologies in Mountainous Housings
Cantilever Beam Housing Mountainous Architecture Native Characteristics Regional Materials Symbiosis Principle between Human and Environment
2011/12/21
Fenghuang Miao minority’s housings have been clearly divided into two types in the previous series of researches, and it is one of the main theoretical basis of this paper. Furthermore there are reces...
The effect of the environment on the gas kinematics and the structure of distant galaxies
Galaxies: evolution -galaxies: clusters -galaxies: kinematics and dynam- ics -galaxies: structure
2011/9/28
With the aim of distinguishing between possible physical mechanisms acting on galaxies when they fall into clusters, we study the properties of the gas and the stars in a sample of 422 emission-line g...
The complete census of optically selected AGNs in the Coma Supercluster: the dependence of AGN activity on the local environment
Galaxies: clusters: individual: Coma Galaxies evolution Galaxies nuclei
2011/10/11
To investigate the dependence of the occurrence of active galactic nuclei (AGNs) on local galaxy density, we study the nuclear properties of ~5000 galaxies in the Coma Supercluster whose density spans...
Geochemical Assessment of Impact of Mine Spoils on the Quality of Stream Sediments within the Obuasi Mines Environment, Ghana
Enrichment Factor Contamination Factor Geo-Accumulation Index
2013/3/7
Stream sediment samples were analyzed for the concentrations of some trace metals in the Obuasi gold mining environment, Ghana. The objectives were to determine the possible impacts of mining operatio...
Understanding Giant Radio Galaxy J1420-0545: Large-Scale Morphology, Environment, and Energetics
Understanding Giant Radio Galaxy J1420-0545: Large-Scale Morphology, Environment, and Energetics
2011/10/18
In this paper we consider the possibility that the structure of the largest radio galaxy J1420-0545 is formed by a restarted rather than a primary jet activity. This hypothesis is motivated by the unu...
The properties and polarization of the H2O and CH3OH maser environment of NGC7538-IRS1
Stars: formation - masers: water, methanol - polarization - magnetic fi elds - ISM: individual: NGC7538
2011/10/17
NGC7538 is a complex massive star-forming region. The region is composed of several radio continuum sources, one of which is IRS1, a high-mass protostar, from which a 0.3 pc molecular bipolar outflow ...
Linear free flexural vibration of cracked functionally graded plates in thermal environment
Functionally graded plate linear free vibration aspect ratio temperature gradient index crack finite element method
2011/9/15
Abstract: In this paper, the linear free flexural vibrations of functionally graded material plates with a through center crack is studied using an 8-noded shear flexible element. The material propert...
Branching diffusions in random environment
Branching process random environment diffusion approximation Laplace transform survival probability backbone construction
2011/9/6
Abstract: We consider the diffusion approximation of branching processes in random environment (BPREs). This diffusion approximation is similar to and mathematically more tractable than BPREs. We obta...
The Nature of Star Formation at 24 microns in the Group Environment at 0.3 < z < 0.55
Nature Star Formation Group Environment
2011/10/8
Galaxy star formation rates (SFRs) are sensitive to the local environment; for example, the high-density regions at the cores of dense clusters are known to suppress star formation. It has been sugges...
Preparation of Environment-Friendly Composite from Waste Paper Fiber and Waste Collagen
Composite Waste Collagen Waste Newspaper Fiber
2011/12/15
Waste newspaper fiber was filled in the collagen cross-linked by glutaraldehyde. The effects of deinking fiber, glycerol dosage, glutaraldehyde dosage on the mechanical properties of composite were in...
Trace Elements Distribution in Red Soils under Semiarid Mediterranean Environment
Trace Elements Castilla-La Mancha Region Red Soils Soil Geochemistry
2013/3/6
This study states the potential trace elements (TE’s) content of red soils located at the centre region of Spain, characterized by low rainfall and slight acidity over prolonged weathering periods. Fo...