scholarly journals Reverse Problem in Surface Texture Analysis—One-Process Profile Modeling on the Basis of Measured Two-Process Profile after Machining or Wear

Materials ◽  
2019 ◽  
Vol 12 (24) ◽  
pp. 4169 ◽  
Author(s):  
Pawel Pawlus ◽  
Rafal Reizer ◽  
Michal Wieczorowski
Keyword(s):  
Standard Deviation ◽  
Correlation Length ◽  
Maximum Error ◽  
Average Error ◽  
Length Estimation ◽  
Profile Height ◽  
The One ◽  
Surface Texture Analysis ◽  
Areal Surface ◽  
Profile Modeling

The method of the base (valley) one-process profile modeling on the basis of the measured two-process profile was developed. The base one-process random profile of the Gaussian ordinate distribution is characterized by the standard deviation of the profile height and the correlation length. The problem of estimation of the correlation length of this one-process profile exists. In the procedure of the correlation length estimation, information about the averaged shape of the autocorrelation functions of many one-process profiles after the same type of machining is required. The correlation length of the base one-process profile can be obtained on the basis of the vertical truncation of the measured two-process profile. The average error of the correlation length estimation was not higher than 7%, while the maximum error was not larger than 14%. This method can be extended to simulate the one-process texture of 3D (areal) surface topography.

scholarly journals Evaluation of effective diffusivity correlations for soybeans in thin layer drying

2020 ◽  
Vol 6 (4) ◽  
pp. 0446-0452
Author(s):  
Felipe D'Avila ◽  
Rafael Maurício Urnau ◽  
Amanda Mansano Zanella Blauth ◽  
Marcos Flávio Pinto Moreira
Keyword(s):  
Effective Diffusivity ◽  
Maximum Error ◽  
Average Error ◽  
Mass Transfer Resistance ◽  
External Mass Transfer ◽  
Transfer Resistance ◽  
Thin Layer Drying ◽  
The World ◽  
The One

Soybean is one of the main crops in the world and drying plays an important role in maintaining the quality of the grains. The present study aimed to evaluate different existing models regarding the ability to predict the effective diffusivity of soybeans, an important parameter in studies of the operation. The slope method was used to determine the effective diffusivity, starting from the second Fick's Law, with negligible shrinkage and external mass transfer resistance. The parameter was analyzed as being dependent on both temperature and moisture content. The correlation proposed by Dotto et al. (2018) was the one with the lowest average error (0.048%) for the consideration of an average effective diffusivity. In order to consider a punctual effective diffusivity, modifications were made to the Dotto model, providing a maximum error of 2.6%.

scholarly journals Turbine Blade Three-Wavelength Radiation Temperature Measurement Method Based on Reflection Error Correction

2021 ◽  
Vol 11 (9) ◽  
pp. 3913
Author(s):  
Kaifeng Zheng ◽  
Jinguang Lü ◽  
Yingze Zhao ◽  
Jin Tao ◽  
Yuxin Qin ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Turbine Blade ◽  
Measurement Method ◽  
Turbine Blades ◽  
Target Surface ◽  
Maximum Error ◽  
Radiation Temperature ◽  
Average Error ◽  
Real Surface ◽  
Wavelength Radiation

The turbine blade is a key component in an aeroengine. Currently, measuring the turbine blade radiation temperature always requires obtaining the emissivity of the target surface in advance. However, changes in the emissivity and the reflected ambient radiation cause large errors in measurement results. In this paper, a three-wavelength radiation temperature measurement method was developed, without known emissivity, for reflection correction. Firstly, a three-dimensional dynamic reflection model of the turbine blade was established to describe the ambient radiation of the target blade based on the real surface of the engine turbine blade. Secondly, based on the reflection correction model, a three-wavelength radiation temperature measurement algorithm, independent of surface emissivity, was proposed to improve the measurement accuracy of the turbine blade radiation temperature in the engine. Finally, an experimental platform was built to verify the temperature measurement method. Compared with three conventional colorimetric methods, this method achieved an improved performance on blade temperature measurement, demonstrating a decline in the maximum error from 6.09% to 2.13% and in the average error from 2.82% to 1.20%. The proposed method would benefit the accuracy in the high-temperature measurement of turbine blades.

Correlation length of the one-dimensional Bose gas

1985 ◽  
Vol 111 (8-9) ◽  
pp. 419-422 ◽  
Author(s):  
N.M. Bogoliubov ◽  
V.E. Korepin
Keyword(s):  
Correlation Length ◽  
Bose Gas ◽  
One Dimensional ◽  
The One

scholarly journals PENGARUH LATIHAN SMALL SIDE GAME TERHADAP KETERAMPILAN PASSING SISWA SMP PLUS NURUL HUDA DALAM EKSTRAKURIKULER SEPAK BOLA TAHUN AJARAN 2020

2020 ◽  
Vol 6 (2) ◽  
pp. 137-145
Author(s):  
Lukmanul Hakim
Keyword(s):  
Standard Deviation ◽  
Extracurricular Activities ◽  
Soccer Players ◽  
Test Results ◽  
Purposive Sampling ◽  
Average Value ◽  
The One ◽  
Academic Year ◽  
Small Side

Abstrak: Ketepatan umpan (passing) merupakan salah satu hal yang sangat penting dalam permainan sepak bola. Banyak metode ataupun cara yang bisa dilakukan untuk melatih dan mengasah kemampuan seseorang untuk meningkatkan kualitas passing pada pemain sepak bola. Penelitian ini memiliki tujuan untuk mengetahui pengaruh latihan small side game terhadap keterampilan passing siswa SMP Plus Nurul Huda dalam ekstrakurikuler sepak bola tahun ajaran 2020. Penelitian ini merupakan penelitian eksperimen dengan menggunakan desain One-Group Pretest-posttest Design.Populasi pada penelitian ini adalah siswa ekstrakurikuler sepak bola.Sampel yang digunakan yaitu purposive sampling, dengan syarat bahwa subjek yang digunakan adalah siswa SMP Plus Nurul Huda kelas VII dan VIII yang mengikuti kegiatan ekstrakurikuler. Jumlah sampel pada penelitian ini berjumlah 16 orang.Hasil penelitian menunjukan pada nilai rata-rata yang diperoleh ketika melakukan tes awal adalah 17,38 dengan simpangan baku 1,82. Sedangkan untuk nilai tes akhir adalah rata-rata 25,94 dengan simpangan baku 1,87. Hasil uji-t memperoleh nilai t-hitung > t-tabel(20,990 > 2,13), maka Ho di tolak dan Ha diterima. Dengan demikian dapat disimpulkan bahwa terdapat pengaruh latihan small side game terhadap keterampilan passing siswa SMP Plus Nurul Huda dalam ekstrakurikuler sepak bola tahun ajaran 2020. Kata kunci :small side game, passing   Abstract: The accuracy of the pass (passing) is one of the most important things in soccer. There are many methods or ways that can be done to train and hone one's skills to improve the quality of passing on soccer players. This study aims to determine the effect of small side game training on the passing skills of SMP Plus Nurul Huda students in soccer extracurricular activities for the 2020 academic year.This research is an experimental study using the One-Group Pretest-posttest Design. The population in this study were soccer extracurricular students. The sample used was purposive sampling, with the condition that the subjects used were students of SMP Plus Nurul Huda class VII and VIII who participated in extracurricular activities. The number of samples in this study amounted to 16 people.The results showed that the average value obtained when conducting the initial test was 17.38 with a standard deviation of 1.82. As for the final test score is an average of 25.94 with a standard deviation of 1.87. The t-test results obtained the value of t-count> t-table (20.990> 2.13), then Ho was rejected and Ha was accepted. Thus it can be concluded that there is an effect of small side game training on the passing skills of SMP Plus Nurul Huda students in the football extracurricular activities for the 2020 academic year. Key words: small side game, passing

MMPI-2 Scores of Puerto Rican, Mexican, and U.S. Latino College Students: A Research Note

2000 ◽  
Vol 87 (1) ◽  
pp. 266-268 ◽  
Author(s):  
Jose J. Cabiya ◽  
Denise A. Chavira ◽  
Francisco C. Gomez ◽  
Emilia Lucio ◽  
Jeanett Castellanos ◽  
...  
Keyword(s):  
United States ◽  
College Students ◽  
Puerto Rico ◽  
Standard Deviation ◽  
Puerto Rican ◽  
The United States ◽  
Clinical Scale ◽  
The Mean ◽  
The One ◽  
Scale Data

In this brief report, we present MMPI-2 basic validity and clinical scale data of Latino-descent persons from Puerto Rico ( n = 290), Mexico ( n = 1,920), and the United States ( n = 28). All were administered one of three Spanish translations of the MMPI-2. A review of the mean scores of these respective groups indicates similarities across all scales. Differences among these three groups, with the exception of the Mf scale (which is keyed to sex), were well within the one standard deviation band. More importantly, these findings are promising given the fact that three different translations of the MMPI-2 were applied.

Deformation of sliding charge density wave in Rb0.3MoO3

2002 ◽  
Vol 12 (9) ◽  
pp. 323-324
Author(s):  
D. Le Bolloc'h ◽  
S. Ravy ◽  
P. Senzier ◽  
C. Pasquier ◽  
C. Detlefs
Keyword(s):  
Charge Density ◽  
Correlation Length ◽  
Charge Density Wave ◽  
Density Wave ◽  
Relaxation Times ◽  
X Ray Diffraction ◽  
Electrical Field ◽  
One Dimensional ◽  
High Q ◽  
The One

The correlation length of the charge density wave ordering in Rb0.3, MoO, has been studied by x-ray diffraction under electric field applied along the one-dimensional axis. The (10, 0.25, -5.5) satellite reflection has been measured in 3D, using high Q-resolution available at the ESRF. Under electrical field, the satellite reaches two stable positions depending on the temperature. It can switch from one to another as a function of the temperature and the current with very long relaxation times ($\rm 10^{th}$ of minutes). After several cycling with T and E, the satellite reflection is found to shift in the 3 main directions. The width of the satellite is reduced by a factor of two in the k-direction and an increase of the transverse correlation length is observed in the two others: the ordered domains look elongated, reaching until 5000 Å in the direction of the applied field and around 1OOO Å, in the perpendicular directions.

Calculation of the temperature of crystallization of silicates from basaltic melts

1981 ◽  
Vol 44 (333) ◽  
pp. 19-26 ◽  
Author(s):  
W. J. French ◽  
E. P. Cameron
Keyword(s):  
Crystallization Temperature ◽  
Maximum Error ◽  
Average Error ◽  
Multivariate Statistical Techniques ◽  
Multivariate Statistical ◽  
Marquesas Islands ◽  
Melt Composition ◽  
The Relationship ◽  
Basaltic Melts

AbstractThis paper discusses the relationship between the chemical composition of basic melts and the temperatures at which olivine, clinopyroxene, and plagioclase begin to crystallize at one atmosphere. Diagrams are given which show the correlation between crystallization temperature and melt composition and which allow some of the temperatures to be estimated. Because the relationship between melt composition and crystallization temperature is virtually linear over short compositional ranges, the data available can be subdivided and examined by linear multivariate statistical techniques. The result is a set of equations which permit the crystallization temperatures to be calculated with an average error of less than 6 °C and a maximum error of 27 °C. These equations have been tested by experimental determination of crystallization temperatures for a range of rocks from the Marquesas Islands.

scholarly journals Experimental Analysis and Simulation of Novel Technical Textile Reinforced Composite of Banana Fibre

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1134 ◽  
Author(s):  
Mario Monzón ◽  
Rubén Paz ◽  
Martí Verdaguer ◽  
Luis Suárez ◽  
Pere Badalló ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Predictive Modelling ◽  
Experimental Results ◽  
Average Error ◽  
Acceptable Error ◽  
Simulation Based ◽  
Banana Fibre ◽  
The One ◽  
Textile Reinforced Composite ◽  
Definition Of

The use of natural fibres allows reducing environmental impact, due to their natural renewable origin and the lower energy needed for their production and processing. This work presents the mechanical characterization of a newly developed technical textile, with banana fibre treated by enzymes, comparing experimental results with numerical simulation based on the definition of the unit cell at micromechanical level. The experimental test shows that the composite with the fabric of banana fibre presents worse mechanical behaviour than the one with commercial flax fibre. The presence of wool, necessary for producing the yarn, reduces the mechanical properties of the banana textile. The numerical simulation had an acceptable error compared with the experimental results, with a global average error of 9%, showing that the predictive modelling based on the multiscale method is suitable for the design process of this kind of composite.

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