FFT Based Single Frequency Interference Accurate Analysis Method for OFDM Signal

2010 ◽  
Author(s):  
Ying XiaoFan
Keyword(s):  
Single Frequency ◽  
Analysis Method ◽  
Accurate Analysis ◽  
Ofdm Signal

scholarly journals Fast and Accurate Finite Transducer Analysis Method for Wireless Passive Impedance-Loaded SAW Sensors

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3988
Author(s):  
Wei Luo ◽  
Yang Yuan ◽  
Yi Wang ◽  
Qiuyun Fu ◽  
Hui Xia ◽  
...  
Keyword(s):  
Computation Time ◽  
Processing Unit ◽  
Bulk Wave ◽  
Analysis Method ◽  
Accurate Analysis ◽  
Central Processing ◽  
Finite Transducer ◽  
Long Time ◽  
High Degree ◽  
Element Method

An accurate and fast simulation tool plays an important role in the design of wireless passive impedance-loaded surface acoustic wave (SAW) sensors which have received much attention recently. This paper presents a finite transducer analysis method for wireless passive impedance-loaded SAW sensors. The finite transducer analysis method uses a numerically combined finite element method-boundary element method (FEM/BEM) model to analyze non-periodic transducers. In non-periodic transducers, FEM/BEM was the most accurate analysis method until now, however this method consumes central processing unit (CPU) time. This paper presents a faster algorithm to calculate the bulk wave part of the equation coefficient which usually requires a long time. A complete non-periodic FEM/BEM model of the impedance sensors was constructed. Modifications were made to the final equations in the FEM/BEM model to adjust for the impedance variation of the sensors. Compared with the conventional method, the proposed method reduces the computation time efficiently while maintaining the same high degree of accuracy. Simulations and their comparisons with experimental results for test devices are shown to prove the effectiveness of the analysis method.

A Novel Hurst Method to Determine Gas Eruption Period

2015 ◽  
Vol 713-715 ◽  
pp. 2097-2100
Author(s):  
Hang Su ◽  
Kai Chen Cao ◽  
Yu Zhe Wang ◽  
Hui Wen Xue
Keyword(s):  
Field Test ◽  
Test Data ◽  
Coal Mine ◽  
Fractal Geometry ◽  
Manufacturing Process ◽  
Hurst Parameter ◽  
Analysis Method ◽  
Accurate Analysis ◽  
Gas System ◽  
Mine System

In order to have more accurate analysis about the eruption period of gas eruption under a coal mine system, fractal geometry theory was introduced. Based on field test data, a novel R / S analysis method was used to calculate the Hurst parameter, which determined the persistence correlation of the gas system, and eruption period was calculated subsequently. The period was used by the coal mine factory to arrange the manufacturing process and for three years no accident about gas eruption under the coal mine was reported.

scholarly journals Development of Highly Accurate Analysis Method for Compressible Fluid Considering Radiation and Ablation

2007 ◽  
Vol 127 (9) ◽  
pp. 1002-1008 ◽  
Author(s):  
Makoto Koizumi ◽  
Hajime Urai ◽  
Youichi Osita ◽  
Naoki Osawa ◽  
Masanori Tukushi ◽  
...  
Keyword(s):  
Compressible Fluid ◽  
Analysis Method ◽  
Accurate Analysis

Analysis of Elastomers by Gas Chromatography

1964 ◽  
Vol 37 (1) ◽  
pp. 297-309 ◽  
Author(s):  
H. Hulot ◽  
P. Lebel
Keyword(s):  
Gas Chromatography ◽  
Small Samples ◽  
Feeding System ◽  
Analysis Method ◽  
Accurate Analysis ◽  
Volatile Products ◽  
Chromatographic Unit ◽  
Last Stage ◽  
Set Up ◽  
Basic Constituent

Abstract This study is the last stage in the design of a new analysis method for either pure or mixed elastomers. Such elastomers are polymers which, when brought to high temperatures, are dissociated into their basic constituent monomers (isoprene for natural rubber, isobutylene for butyl rubber, and so on) and other more or less volatile products. The principle of the study consists in analyzing such different fractions with a chromatographic unit which exhibit peaks used to differentiate various polymers according to their relative positions. The main novelty of the method is the elimination of less volatile fractions which are trapped in ice at 0° C, so that only lighter fractions are fed to the chromatograph. In order that the latter may be fully available or ready for analysis, pyrolysis is carried out directly in the carrier gas circuit, in a furnace set-up, instead of in the gas sample feeding system of the chromatographic unit. Pyrolysis made directly in the unit offers several advantages: Very accurate analysis, since all the pyrolyzate is fed to the unit; Very small samples (1–4 mg); Reduced handling.

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