A Noise Removal Method in Measurement of Particle Size Distribution by the Shifrin-Transform

2014 ◽  
Vol 1058 ◽  
pp. 93-96 ◽  
Author(s):  
Yue Han ◽  
Zong Ling Yang ◽  
Yin Nan Yuan ◽  
Bing Dai
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Large Angle ◽  
Bimodal Distribution ◽  
Noise Removal ◽  
Good Effect ◽  
Actual Measurement ◽  
Original Distribution ◽  
Angle Data

In actual measurement of particle size distribution by the Shifrin-transform, many noises are easily misread as distribution peaks, and bring serious difficulties to the measurement. The purpose of this paper is to find a method of removing these noises to improve existing technology. By analyzing the source of these noises, we found these noises are mainly caused by the serious large angle data loss, and then propose a compensation function in the Shifrin-transform to remove these noises. Simulations explain that the method has a good effect. The method is actually tested for the sample particles of the unimodal and bimodal distribution by experiments. The result shows that the noises disappear but the number and location of original distribution peaks aren’t affected after using the compensate function. So this method can remove effectively noises and restore accurately original distribution in the measurement.

scholarly journals Monte Carlo simulation for soot dynamics

2012 ◽  
Vol 16 (5) ◽  
pp. 1391-1394 ◽  
Author(s):  
Kun Zhou
Keyword(s):  
Particle Size ◽  
Monte Carlo ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Gas Phase ◽  
Volume Fraction ◽  
Soot Formation ◽  
Bimodal Distribution ◽  
Number Density ◽  
Stochastic Error

A new Monte Carlo method termed Comb-like frame Monte Carlo is developed to simulate the soot dynamics. Detailed stochastic error analysis is provided. Comb-like frame Monte Carlo is coupled with the gas phase solver Chemkin II to simulate soot formation in a 1-D premixed burner stabilized flame. The simulated soot number density, volume fraction, and particle size distribution all agree well with the measurement available in literature. The origin of the bimodal distribution of particle size distribution is revealed with quantitative proof.

On-Road Particulate Emission Characteristics of a Diesel Vehicle with Butanol-Diesel Blends

2013 ◽  
Vol 420 ◽  
pp. 177-184 ◽  
Author(s):  
Di Ming Lou ◽  
Liang Fang ◽  
Zhi Yuan Hu ◽  
Pi Qiang Tan
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Working Conditions ◽  
Alternative Fuels ◽  
Good Effect ◽  
Emission Characteristics ◽  
Particulate Emission ◽  
Accumulation Mode ◽  
Diesel Vehicle

To study the applicability of alternative fuels, a TSI EEPS-3090 on-board vehicle particle emission test system is used on a diesel vehicle with a inline four-cylinder, electronic unit injectors, high pressure direct injection, turbocharging, 1.9L output volume engine, to investigate the on-road particulate emission characteristic burned with pure diesel, 10% and 20% by volume of n-butanol blend with pure diesel. Comparing the emission characteristics of different fuels, the study revealed that the butanol-diesel blend have a good effect of thinning the particle size without modifying and recalibrating the engine. In different types of roads and different VSP, the PN and PM of Bu10 and Bu20 are all less than that of D100; At same working conditions with the same kind of fuels, the particle size distribution are nearly the same; Compared with D100, Bu10 and Bu20, at different working conditions ,the particle size distribution are all bimodal, but Bu10 and Bu20 trend to be unimodal; At the same working conditions, the nucleation mode PN of Bu10 and Bu20 are obviously higher than that of D100, and the accumulation mode PN of Bu10 and Bu20 are obviously lower than that of D100; The peak of accumulation mode PN of Bu10 and Bu20 trend to be at smaller particle size.

Effects of Particle Size Distribution on Corrosion Rate of Carbon Steel in Soil

2020 ◽  
Vol 69 (4) ◽  
pp. 102-106
Author(s):  
Shota Ohki ◽  
Shingo Mineta ◽  
Mamoru Mizunuma ◽  
Soichi Oka ◽  
Masayuki Tsuda
Keyword(s):  
Particle Size ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Particle Size Distribution ◽  
Size Distribution

DENSE SPRAY CORRECTIONS FOR DIFFRACTION-BASED PARTICLE SIZE DISTRIBUTION MEASUREMENTS

1995 ◽  
Vol 5 (1) ◽  
pp. 75-87 ◽  
Author(s):  
Christine M. Woodall ◽  
James E. Peters ◽  
Richard O. Buckius
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution

Influence of Cementite Particle Size Distribution on Machinability and Tool Life of High Carbon Cr-bearing Steels

1998 ◽  
Vol 84 (5) ◽  
pp. 387-392 ◽  
Author(s):  
Takashi INOUE ◽  
Yuzo HOSOI ◽  
Koe NAKAJIMA ◽  
Hiroyuki TAKENAKA ◽  
Tomonori HANYUDA
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Tool Life ◽  
Cementite Particle ◽  
High Carbon ◽  
Bearing Steels

1239 Sources of variation in dry matter content and particle size distribution in total mixed rations in dairy farms in Argentina

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 596-597
Author(s):  
P. Turiello ◽  
M. Ruiz de Huidobro ◽  
F. Bargo ◽  
A. Larriestra ◽  
A. Relling
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Dry Matter ◽  
Dairy Farms ◽  
Matter Content ◽  
Dry Matter Content ◽  
Sources Of Variation

Study of the microstructure and particles of vanadium (III) oxide, vanadium (V) oxide and lithium aluminate powders

2020 ◽  
Vol 86 (1) ◽  
pp. 32-37
Author(s):  
Valeria A. Brodskaya ◽  
Oksana A. Molkova ◽  
Kira B. Zhogova ◽  
Inga V. Astakhova
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Vanadium Oxide ◽  
Size Distribution ◽  
Microstructural Analysis ◽  
Coherent Scattering ◽  
Powder Materials ◽  
Lithium Aluminate ◽  
Range Limit ◽  
Oxide Particles

Powder materials are widely used in the manufacture of electrochemical elements of thermal chemical sources of current. Electrochemical behavior of the powders depends on the shape and size of their particles. The results of the study of the microstructure and particles of the powders of vanadium (III), (V) oxides and lithium aluminate obtained by transmission electron and atomic force microscopy, X-ray diffraction and gas adsorption analyses are presented. It is found that the sizes of vanadium (III) and vanadium (V) oxide particles range within 70 – 600 and 40 – 350 nm, respectively. The size of the coherent-scattering regions of the vanadium oxide particles lies in the lower range limit which can be attributed to small size of the structural elements (crystallites). An average volumetric-surface diameter calculated on the basis of the surface specific area is close to the upper range limit which can be explained by the partial agglomeration of the powder particles. Unlike the vanadium oxide particles, the range of the particle size distribution of the lithium aluminate powder is narrower — 50 – 110 nm. The values of crystallite sizes are close to the maximum of the particle size distribution. Microstructural analysis showed that the particles in the samples of vanadium oxides have a rounded (V2O3) or elongated (V2O5) shape; whereas the particles of lithium aluminate powder exhibit lamellar structure. At the same time, for different batches of the same material, the particle size distribution is similar, which indicates the reproducibility of the technologies for their manufacture. The data obtained can be used to control the constancy of the particle size distribution of powder materials.

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