Development of a protocol for the rapid identification of solid materials using the principal component analysis (ACP) method: Case of phosphate fertilizers

Sadek, Otmane; Touhtouh, Samira; Bouabdalli, El Mahdi; Hajjaji, Abdelowahed

doi:10.1016/j.matpr.2022.06.083

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…Relief F method is a distance-based feature selection algorithm exclusively for classification problems with two classes, whose core idea is to assign different weights denoting importance to attributes according to their values that distinguish between instances near to each other [45]. The principal component analysis (PCA) method is a multivariate data analysis methods [46]. The mean goal of PCA is to achieve dimensionality reduction with the minimum mean square error [47].…”

Section: Discussionmentioning

confidence: 99%

Sum Standard Deviation of Frequency – A Context Independent Machine Condition Trend Indicator

Feng,

2023

Digit. Manuf. Technol.

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In Industry 4.0, multiple research subjects have been involved in processing enormous information generated during the manufacturing process. Meanwhile, they all pursue the same goal, that is, to maintain the manufacturing process at good operating state. Hence, many researchers are focusing their researches on continuous health monitoring using digital signal processing techniques, in particular, most researches are focused on recognition of a fault condition only. However, by the time when a fault is recognised, at least one reject has been produced, or an impact to the system's operation has occurred. In addition, many algorithms are designed specifically for certain class of applications. This paper proposes a new system health condition indicator, Sum Standard Deviation of Frequency (SSDF), which is computed from a new computational process that segments raw data streams into time segments and the segments are synchrosqueezed continuous wavelet transformed. As long as sufficient data is available, SSDF shows distinct consecutive regions for "normal", "marginal" and "abnormal" machine conditions. Actions can then be taken while the machine is in "marginal" conditions in which the manufacturing quality is still acceptable. SSDF does not link to any application context information of the raw signal data stream hence making it context independent.

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Section: Discussionmentioning

confidence: 99%

Sum Standard Deviation of Frequency – A Context Independent Machine Condition Trend Indicator

Feng,

2023

Digit. Manuf. Technol.

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“…Glasses composed of silicophosphate compounds doped with rare-earth elements are considered highly promising for a range of applications. These applications include light conversion, the generation of visible and near-infrared radiation, the production of white light-emitting diodes, and the development of light-converting devices [11][12][13][14][15][16][17]. Additionally, trivalent rare-earth ions have been successfully integrated into a diverse range of glass compositions, including silicates and phosphates, enabling the fabrication of active optical devices like lasers, phosphors, and infrared-to-visible up-converters.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structural, and optical behavior of erbium‐doped silicophosphate glasses for photonics applications

Bouabdalli,

El Jouad,

Touhtouh

et al. 2024

Luminescence

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Erbium‐incorporated silicophosphate glasses are very desirable in principal sectors such as photonics, optoelectronics, lasers, and illuminating diodes. The focus of the current investigation has been on determining how the erbium dopant affects the optical, physical, and structural characteristics of the silicophosphate‐based glasses. The pure silicophosphate glasses and doped with various contents of erbium were prepared by the sol–gel process in this work. The noncrystalline character of the glasses synthesized was confirmed by the XRD patterns that were obtained. The optical measurement showed that the addition of trivalent erbium ions resulted in an increase in the refractive index of the samples and a decrease in their energy band gap values. It demonstrated the presence of P–O–P linkage stretching vibration modes that were both symmetrical and asymmetrical, P–O in PO4 bending vibration modes, OH group elongating and flexure vibrations, and P–O–H water absorption in glasses. The theoretical values of the optical basicity (Ʌth) increased from 0.465 to 0.472, while the values of the interaction parameter (A) decreased from 0.218 to 0.214 . Silicophosphate glasses doped with trivalent erbium ions show promise as optoelectronic and optical filter system materials.

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“…The physico-chemical properties of materials can be determined experimentally, for example by X-ray defraction (XRD), infrared spectroscopy (IR), UV-Visible spectroscopy and other methods of material characterization [10,11], or therapeutically, among the most advanced theoretical methods is density functional theory (DFT) [12]. One of the software packages using DFT is CASTEP (Cambridge Serial Total Ennery Package Software) [13], which provides information on total energies, forces and stresses exerted on an atomic system, as well as the calculation of optimal geometry, band structures, optical spectra and elastic constants.…”

Section: Introductionmentioning

confidence: 99%

DFT study on the electronic, structure, magnetic and optical properties of TiO2 anatase

Sadek,

Touhtouh,

Hajjaji

2023

Preprint

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In this work, the electronic structure, magnetic and optical properties of the anatase phase of titanium dioxide (TiO2) were etudiée by the Density Functional Theory (DFT) method, using the GGA+U method. As a result, the magnetic electronic properties show that anatase is a non-magnetic semiconductor with an indirect gap of 3.202. Optical properties such as dielectric function, refractive index, extinction coefficient, reflectivity, absorption coefficient and conductivity were found to be 8.21, 2.91, 1.98, 0.532, 517000 cm-1 and 8.9 fs-1 respectively. These results are in agreement with the available experimental results.

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Development of a protocol for the rapid identification of solid materials using the principal component analysis (ACP) method: Case of phosphate fertilizers

Cited by 12 publications

References 16 publications

Sum Standard Deviation of Frequency – A Context Independent Machine Condition Trend Indicator

Sum Standard Deviation of Frequency – A Context Independent Machine Condition Trend Indicator

Synthesis, structural, and optical behavior of erbium‐doped silicophosphate glasses for photonics applications

DFT study on the electronic, structure, magnetic and optical properties of TiO2 anatase

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