Results 231 to 240 of about 5,730,304 (286)
Some of the next articles are maybe not open access.
A peak-strength strain energy storage index for rock burst proneness of rock materials
International Journal of Rock Mechanics And Mining Sciences, 2019Judgement of rock burst proneness of rock materials is one of the basic problems in the field of rock burst research. In this study, a peak-strength strain energy storage index is proposed for estimating and classifying the rock burst proneness of rock ...
F. Gong, Jingyi Yan, Xibing Li, Song Luo
semanticscholar +1 more source
Peak-to-peak equivalent sound pressure level
International Journal of Audiology, 2003(2003). Peak-to-peak equivalent sound pressure level. International Journal of Audiology: Vol. 42, No. 8, pp. 494-495.
Peter M, Haughton +2 more
openaire +2 more sources
Resources, Conservation and Recycling, 2019
The experiences of peak carbon emissions in developed economies can provide a significant reference for other economies. In terms of peak carbon intensity, per capita carbon emissions and carbon emissions, the peak process in developed economies is ...
Feng Dong +4 more
semanticscholar +1 more source
The experiences of peak carbon emissions in developed economies can provide a significant reference for other economies. In terms of peak carbon intensity, per capita carbon emissions and carbon emissions, the peak process in developed economies is ...
Feng Dong +4 more
semanticscholar +1 more source
Peak–Peak Repulsion in Ion Mobility Spectrometry
Analytical Chemistry, 2012The space charge effect has an important role in instruments dealing with ion packets and charged particles in gas phase such as the mass spectrometer and ion mobility spectrometer (IMS). It has been shown that the space charge is partially responsible for peak broadening in IMS depending on the ion density.
Vahideh, Ilbeigi, Mahmoud, Tabrizchi
openaire +2 more sources
An Overview: Peak-to-Average Power Ratio Reduction Techniques for OFDM Signals
IEEE transactions on broadcasting, 2008One of the challenging issues for Orthogonal Frequency Division Multiplexing (OFDM) system is its high Peak-to-Average Power Ratio (PAPR). In this paper, we review and analysis different OFDM PAPR reduction techniques, based on computational complexity ...
Tao Jiang, Yiyan Wu
semanticscholar +1 more source
Peak-to-peak dynamics in food chain models
Theoretical Population Biology, 2003We show in this paper that the chaotic regimes of many food chain models often enjoy a very peculiar property, known as peak-to-peak dynamics. This means that the maximum (peak) density of the populations of any trophic level can be easily forecasted provided the last two peaks of the same population are known. Moreover, extensive simulation shows that
Candaten, M., Rinaldi, S.
openaire +5 more sources
Peak-to-Average Power Ratio of OTFS Modulation
IEEE Communications Letters, 2019In this letter, we analyze the peak-to-average power ratio (PAPR) of orthogonal time frequency space modulation (OTFS) waveform. Towards this, we consider modulation symbols on an $N\times M$ delay-Doppler grid, where $N$ and $M$ are the number of ...
G. Surabhi +2 more
semanticscholar +1 more source
Artificial peaks in energy dispersive X‐ray spectra: sum peaks, escape peaks, and diffraction peaks
X-Ray Spectrometry, 2016Sum peaks, escape peaks, and diffraction peaks are considered artificial or spurious peaks in energy dispersive X‐ray spectrometry. Experimental examples are given, which showed that escape and diffraction peaks can add up to become sum peaks. These artificial peaks are not weak, and great care must be taken to differentiate them from peaks due to ...
Ryohei Tanaka +3 more
openaire +1 more source
BMJ, 2017
A 28 year old man with no medical history was referred to an ophthalmologist with a three year history of gradually worsening visual acuity. His left eye uncorrected distance visual acuity was 20/100, and corrected distance visual acuity was 20/60 (Snellen scale). With direct ophthalmoscopy, we could observe scissoring of the red reflex, and a penlight
José Ferreira, Mendes, Tiago, Monteiro
openaire +2 more sources
A 28 year old man with no medical history was referred to an ophthalmologist with a three year history of gradually worsening visual acuity. His left eye uncorrected distance visual acuity was 20/100, and corrected distance visual acuity was 20/60 (Snellen scale). With direct ophthalmoscopy, we could observe scissoring of the red reflex, and a penlight
José Ferreira, Mendes, Tiago, Monteiro
openaire +2 more sources
Journal of Magnetic Resonance, Series B, 1996
Identification and quantitation in conventional 1H spectroscopic imaging in vivo is often hampered by the small chemical-shift range. To improve the spectral resolution of spectroscopic imaging, homonuclear two-dimensional correlation spectroscopy has been combined with phase encoding of the spatial dimensions.
A, Ziegler +7 more
openaire +2 more sources
Identification and quantitation in conventional 1H spectroscopic imaging in vivo is often hampered by the small chemical-shift range. To improve the spectral resolution of spectroscopic imaging, homonuclear two-dimensional correlation spectroscopy has been combined with phase encoding of the spatial dimensions.
A, Ziegler +7 more
openaire +2 more sources

