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SIM: a Korean signature extraction method
Proceedings of TENCON '93. IEEE Region 10 International Conference on Computers, Communications and Automation, 2002The signature file method has been recently thought as a useful text retrieval method when inverted file method is not available. However, traditional word-oriented signature file methods cannot retrieve all the relevant text items in the variable-spacing environment such as Korean text.
null Byoungho Song, null Sukho Lee
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Layered constellation generation method based on SIM-OFDM
Optics Communications, 2020Abstract A layered QAM constellation generation method is proposed and it is applied to the SIM-OFDM system. In this method, the bit sequence is grouped layer by layer according to the specific bit and mapped to the corresponding constellation points. In this paper, the 24QAM-SIM-OFDM, 48QAM-SIM-OFDM, 80QAM-SIM-OFDM and 120QAM-SIM-OFDM constellations
Xin Wang +9 more
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SIMS: a capable method for BCN quantification
Applied Surface Science, 2000Abstract Obvious matrix effects often inhibit major component analysis carried out with secondary ion mass spectrometry (SIMS). Although MCs+ secondary ions (M represents the element to be analyzed) are used — already know as matrix independent for some compounds — feasibility of SIMS quantification has separately be validated for each new system ...
T Kolber +5 more
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ToF‐SIMS characterization of microplastics in soils
Surface and Interface Analysis, 2020Microplastics pollution is becoming one of the most serious threats to the surface ecosystem of the earth; it is widespread in oceans, rivers, sediments, soils, and organisms.
Chuan Du +4 more
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Methods for Generating Protein Molecular Ions in ToF-SIMS
Langmuir, 2004One of the greatest challenges in mass spectrometry lies in the generation and detection of molecular ions that can be used to directly identify the protein from the molecular weight of the molecular ion. Typically, proteins are large (MW > 1000), nonvolatile, and/or thermally labile, but the vaporization process produced by many mass spectrometry ...
McArthur, Sally L. +3 more
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A fast sparse iterative method (SIM) for method of moments
Proceedings of IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, 2002The sparse iterative method (SIM) provides a faster solution to method of moments (MoM) matrix equations than does LU-decomposition with forward and back substitution. The SIM produces a solution with computational time proportional to N/sup 2/, as opposed to the N/sup 3/ time dependence associated with LU-decomposition.
A.P.C. Fourie, D.C. Nitch
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New SIMS method to characterize hydrogen in polysilicon films
Journal of Vacuum Science & Technology B, 2022A new analysis protocol for profiling the hydrogen (H) concentration depth distributions in polysilicon (poly-Si) thin films on Si oxide was developed by using secondary ion mass spectrometry (SIMS). Traditional SIMS determination of H concentrations in poly-Si films is to monitor and collect the atomic H−, but this analysis method presents some ...
Xue-feng Lin +6 more
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The infinite velocity method: A new method for SIMS quantification
Surface and Interface Analysis, 1994Abstract Twelve elements spanning a mass range of 197 atomic mass units from five standard reference materials and three implant materials were analysed to ascertain the validity of a new method, termed the infinite velocity method, for quantifying the negative monatomic secondary ion emissions resulting from Cs‐bombarded surfaces ...
P. A. W. Van Der Heide +3 more
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SIMS and RBS analysis of leached glass: Reliability of RSF method for SIMS quantification
Journal of Materials Science: Materials in Electronics, 1996The reliability of the relative sensitivity factor (RSF) approach for secondary ion mass spectrometry (SIMS) quantification of the leached layers on glass was investigated by measuring comparable samples of glass with SIMS and RBS (Rutherford backscattering spectrometry). The RSF factors were calculated using the nominal bulk compositions.
A.A. Salem +5 more
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