نتایج جستجو برای: energy ratios
تعداد نتایج: 781115 فیلتر نتایج به سال:
We present a theoretical framework to calculate how storage affects the energy return on energy investment (EROI) ratios of wind and solar resources. Our methods identify conditions under which it is more energetically favorable to store energy than it is to simply curtail electricity production. Electrochemically based storage technologies result in much smaller EROI ratios than large-scale ge...
in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...
The nuclear level densities and level-density parameters in fissioning nuclei at their saddle points of fission barriers, ${a}_{f}$, as well those for neutron, ${a}_{n}$, proton, ${a}_{p}$, $\ensuremath{\alpha}$-particle, ${a}_{\ensuremath{\alpha}}$, emission residues the ground states are calculated isotopic chains superheavy with $Z$ = 112--120. calculations performed superfluid formalism usi...
This paper uses the econometrics of endogenous structural breaks to examine changes in energy intensity for OECD countries over 1960-2009. Nearly all OECD countries currently have significant negatively trending energy-GDP ratios; but for several countries those negative trends are recent, and two countries have recent significant positive trends. For several countries, energy intensity had a s...
We have examined broadband regional waveforms of recent (since 1988) Nevada Test Site (NTS) underground explosions and earthquakes throughout the southwestern United States and Baja, Mexico, recorded by TERRAscope and other IRIS stations in order to characterize seismic sources for the purposes of event identification. As expected, earthquakes tended to be richer in long-period surface-wave and...
in this research, in order to develop new relationships with reasonable accuracy for estimation of the submerged hydraulic jump characteristics, a study has been conducted experimentally. experiments have been done in a rectangular channel with a length of 9 m, a width of 0.5 m and a depth of 0.45 m. froude numbers in these tests range from 3.5 to 11.5 and between submergence ratios of 0.1 t...
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