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101.
This paper presents ACO_GLS, a hybrid ant colony optimization approach coupled with a guided local search, applied to a layout problem. ACO_GLS is applied to an industrial case, in a train maintenance facility of the French railway system (SNCF). Results show that an improvement of near 20% is achieved with respect to the actual layout. Since the problem is modeled as a quadratic assignment problem (QAP), we compared our approach with some of the best heuristics available for this problem. Experimental results show that ACO_GLS performs better for small instances, while its performance is still satisfactory for large instances. 相似文献
102.
103.
Chenxi Zhang Wei Cao Adetayo V. Adedeji Hani E. Elsayed-Ali 《Journal of Sol-Gel Science and Technology》2014,69(2):320-324
Vanadium dioxide (VO2) thin films were fabricated using a simple and novel sol–gel process in which V2O5 was used as the vanadium source; oxalic acid was used as the reducing agent; and polyvinyl alcohol was used as the film former to control the viscosity of the VO2 precursor solution and bond vanadium ions. The microstructure and surface morphology of VO2 films were studied by X-ray diffraction and scanning electron microscopy, respectively. The results showed that using polyvinyl alcohol forms porous nanostructure of VO2 films with a uniform grain size of ~25 nm. The measured optical reflectance shows well-defined phase transition as observed by an increase of reflectance upon heating above the transition temperature from ~11 to ~30 % at 1,100 nm. Upon cooling, the expected hysteresis is observed. 相似文献
104.
Application of two new series of ionic liquid matrices (ILMs) based on the two most predominantly used conventional organic matrices (Sinapinic acid and 2,5-DHB) in conjugation with various bases (aniline (ANI), dimethyl aniline (DMANI), diethylamine (DEA), dicyclohexylamine (DCHA), pyridine (Pyr), 2-picoline(2-P), 3-picoline(3-P)) for bacterial analysis in matrix assisted laser desorption/ionisation mass spectrometry (MALDI-MS) are reported. The results reveal that ionic liquid matrices could significantly enhance the protein signals, reduce spot-to-spot variation and increase spot homogeneity. More importantly, these novel matrices would not produce any interference during MALDI-MS analysis. Among these ILMs, 2,5-DHB/ANI, 2,5-DHB/DMANI and 2,5-DHB/Pyr can be successfully applied to intact bacterial studies compared with other ILMs. Base molecules when added to conventional matrix can promote proton transfer between the bacterial lysate and the matrices. Due to the enhanced proton transfer efficiency by the ionic liquid matrices, almost all the biomolecules of the intact bacterial cells can be ionized and detected in the MALDI-MS. All synthesized ILMs were characterized using ESI (+)/MS and UV-spectroscopy. 相似文献
105.
Muhammad Ramzan Manwar Hussain Hani Asfour Muhammad Yasir Asifullah Khan Hussein Sheikh Ali Mohamoud Jumana Y. Al-Aama 《Journal of carbohydrate chemistry》2013,32(3):169-183
Glycans play a vital role in modulating many physiological and pathological phenomena of microbes and humans, such as bacterial adhesion, colonization, host-microbial interactions, cancer recognition, and blood group determination. The aim of the current review is to provide an account of the functions of N-acetyl sialic acid (Neu5Ac) and galactose (Gal) residues in microbial pathology. Specifically, an overview of the biosynthesis and metabolism of Neu5Ac and Gal residues in different bacterial species will provide a better understanding of microbial pathogenesis in the human body. 相似文献
106.
Ashraf Hassan FarhaAli Oguz Er Yüksel UfuktepeGanapati Myneni Hani E. Elsayed-Ali 《Applied Surface Science》2011,258(4):1613-1618
NbNx films were deposited on Nb substrate using pulsed laser deposition. The effects of substrate deposition temperature, from room temperature to 950 °C, on the preferred orientation, phase, and surface properties of NbNx films were studied by X-ray diffraction, atomic force microscopy, and electron probe micro analyzer. We find that the substrate temperature is a critical factor in determining the phase of the NbNx films. For a substrate temperature up to 450 °C the film showed poor crystalline quality. With temperature increase the film became textured and for a substrate temperature of 650−850 °C, mix of cubic δ-NbN and hexagonal phases (β-Nb2N + δ′-NbN) were formed. Films with a mainly β-Nb2N hexagonal phase were obtained at deposition temperature above 850 °C. The c/a ratio of β-Nb2N hexagonal shows an increase with increased nitrogen content. The surface roughness of the NbNx films increased as the temperature was raised from 450 to 850 °C. 相似文献
107.
Transverse magnetic (TM) waves in a four-layer slab waveguide structure are studied for optical sensing applications. The structure consists of a semi-infinite substrate, a thin metal layer, a medium with negative permittivity and permeability as a guiding layer, and a semi-infinite layer as a cover. The proposed sensor is operated in reflection mode in which the angular position of the reflectance peak is used to detect small changes in the refractive index of the cover medium. The optimal structure parameters that correspond to the sharpest and highest peak are presented. The results reveal that for aluminum metal layer, a thickness of about 9 nm represents the optimum metal thickness. Moreover, the thickness, negative permittivity, and negative permeability of the guiding layer are found to have great impacts on the performance of the proposed optical waveguide sensor. 相似文献
108.
Hani A.Khashan 《数学物理学报(B辑英文版)》2012,32(2):645-651
In this article,we define almost prime submodules as a new generalization of prime and weakly prime submodules of unitary modules over a commutative ring with identity.We study some basic properties of... 相似文献
109.
Ismail Hani K. Alesary Hasan F. Al-Murshedi Azhar Y. M. Kareem Jalil H. 《Journal of Solid State Electrochemistry》2019,23(11):3107-3121
Journal of Solid State Electrochemistry - We report herein the electrochemical polymerisation of aniline from a choline chloride (ChCl)-based deep eutectic solvent (DES) at room temperature in both... 相似文献
110.
Jose Gustavo De la Ossa Hani El Kadri Jorge Gutierrez-Merino Thomas Wantock Thomas Harle Maurizia Seggiani Serena Danti Rossella Di Stefano Eirini Velliou 《Molecules (Basel, Switzerland)》2021,26(7)
A novel strategy involving Olive Leaf Extract (OLE) and Cold Atmospheric Plasma (CAP) was developed as a green antimicrobial treatment. Specifically, we reported a preliminary investigation on the combined use of OLE + CAP against three pathogens, chosen to represent medical and food industries (i.e., E. coli, S. aureus and L. innocua). The results indicated that a concentration of 100 mg/mL (total polyphenols) in OLE can exert an antimicrobial activity, but still insufficient for a total bacterial inactivation. By using plain OLE, we significantly reduced the growth of Gram positive S. aureus and L. innocua, but not Gram-negative E. coli. Instead, we demonstrated a remarkable decontamination effect of OLE + CAP in E. coli, S. aureus and L. innocua samples after 6 h. This effect was optimally maintained up to 24 h in S. aureus strain. E. coli and L. innocua grew again in 24 h. In the latter strain, OLE alone was most effective to significantly reduce bacterial growth. By further adjusting the parameters of OLE + CAP technology, e.g., OLE amount and CAP exposure, it could be possible to prolong the initial powerful decontamination over a longer time. Since OLE derives from a bio-waste and CAP is a non-thermal technology based on ionized air, we propose OLE + CAP as a potential green platform for bacterial decontamination. As a combination, OLE and CAP can lead to better antimicrobial activity than individually and may replace or complement conventional thermal procedures in food and biomedical industries. 相似文献