搜索结果: 121-135 共查到“知识库 电磁学”相关记录1085条 . 查询时间(0.509 秒)
ULF geomagnetic field measurements in Antarctica are a very important tool for better understanding the dynamics of the Earths magnetosphere and its response to the variable solar wind conditions. We ...
Fast representation of dipole-dipole geoelectrical data with pseudosections for regional surveys
Electrical sounding dipole-dipole methods apparent resistivity deep sounding data processing
2015/9/28
I propose a fast method for constructing pseudosections of apparent resistivity from geoelectrical data collected for deep studies with continuous polar dipole-dipole arrays. Once a vertical section i...
A physical pattern recognition approach for 2D electromagnetic induction studies
electromagnetic induction pattern recognition 2d structures
2015/9/28
We present a new tomographic procedure for the analysis of natural source electromagnetic (EM) induction field data collected over any complex 2D buried structure beneath a flat air-earth boundary. Th...
Magnetic data interpretation in an industrial waste landfill
magnetic survey Euler's deconvulution foundry wastes
2015/9/28
A magnetic and an electromagnetic survey using low induction equipment were performed on a test site in an industrial landfill; the main goal of the geophysical survey was to check the reliability of ...
Worst cases for an one-hop high frequency link
ionosphere radio propagation worst cases ray-tracing
2015/9/25
The characterisation of a HF channel by means of monthly electron density profiles can be complemented with a detailed study of radio propagation «worst cases» on situations with extremes co...
将光滑节点插值法用于悬臂梁的静力学,并首次用于旋转柔性梁的频率分析. 采用梯度光滑技术,用线性插值形函数描述梁的位移场,求解4 阶微分方程. 在静力学分析中,将该方法所得梁中各点位移与假设模态法、有限元法及解析解的结果对比,可知该方法虽用简单的线性插值形函数描述梁的位移场,但精度却很高. 进一步研究表明,采用模态高于9 阶的假设模态法会使刚度阵条件数变差,导致结果发散. 在频率分析中,与有限元法、...
Estimating the Impact of Restructuring on Electricity Generation Efficiency: The Case of the Indian Thermal Power Sector
Generation Efficiency Restructuring
2015/9/18
We thank Resources for the Future, the World Bank Research Board and the KCP Trust Fund for research
support and John Besant-Jones for helpful comments. The findings and conclusions of this paper are...
Why Are Power Plants in India Less Efficient than Power Plants in the United States?
Power Plants Power Plants
2015/9/18
In spite of recent economic growth, India is
a country with serious deficits in its power sector. Four hundred million Indians lack access to
electricity, blackouts have become front-page
news, and...
Behaviour of the F1-region, and Esand spread-F phenomena at European middle latitudes, particularly under geomagnetic storm conditions
F1-region,Esand spread-F tesla
2015/9/14
Knowledge of the ionospheric electron density distribution and its fluctuations is essential for predicting ionospheric characteristics for radio wave propagation and for other applications such as
s...
Time-lapse electrical resistivity anomalies due to contaminant transport around landfills
landfill hydrogeological modeling salinity resistivity geophysical forward and inverse modeling
2015/9/2
The extent of landfill leachate can be delineated by geo-electrical imaging as a response to the varying electrical
resistivity in the contaminated area. This research was based on a combination of h...
Magnetic Base Station Deceptions, a magnetovariational analysis along the Ligurian Sea coast, Italy
telluric currents magnetic base station levelling errors aeromagnetic and marine magnetic surveys
2015/9/2
Reliability of high resolution airborne and shipborne magnetic surveys depends on accurate removal of temporal
variations from the recorded total magnetic field intensity data. At mid latitudes, one ...
Natural and man-made terrestrial electromagnetic noise: an outlook
radio noise background noise
2015/9/2
The terrestrial environment is continuously exposed to electromagnetic radiations which set up a «background»
electromagnetic noise. Within the Non Ionizing Radiation band (NIR), i.e. for f...
Deep electrical resistivity tomography and geothermal analysis of Bradano foredeep deposits in Venosa area (Southern Italy): preliminary results
Southern Apennine geothermal zone deep electrical resistivity tomography magnetotelluric survey
2015/9/1
Geophysical surveys have been carried out to characterize the stratigraphical and structural setting and to better understand the deep water circulation system in the Venosa area (Southern Italy) loca...
A new magnetotelluric monitoring network operating in Agri Valley (Southern Italy): study of stability of apparent resistivity estimates
magnetotelluric remote reference apparent resistivity curve earthquake precursors
2015/9/1
Variations detected in geophysical, especially electromagnetic, parameters in seismic active areas have been
sometimes attributed to modifications of the stress field. Among the different geophysical...