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1
Content available remote Convergence of random oscillatory integrals in the presence of long-range dependence and application to homogenization
Lechiheb A., Nourdin I., Zheng G., Haouala E.
Probability and Mathematical Statistics
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2018
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Vol. 38, Fasc. 2
271--286
EN
This paper deals with the asymptotic behavior of random oscillatory integrals in the presence of long-range dependence. As a byproduct, we solve the corrector problem in random homogenization of onedimensional elliptic equations with highly oscillatory random coefficients displaying long-range dependence, by proving convergence to stochastic integrals with respect to Hermite processes.
2
Content available Preparation of Copper Sulfide Deposition on Modified Poly (Ethylene Terephtalate) Fibres with Good Conductivity
Zheng G., Juan X.
Fibres & Textiles in Eastern Europe
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2018
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Vol. 26, no. 1 (127)
25--29
EN
The immobilization of CuS on the surface of poly (ethylene terephtalate) (PET) fibres was carried out by the functionalization of PET fibres with chitosan (CS), followed by the chemical deposition method. Crosslinked chitosan with NH2 functionality was used as a chelator to absorb copper ions, which can successfully initiate CuS deposition in the following chemical deposition stage. The CuS-loaded fibres were characterised by scanning electron microscopy, X-ray diffraction, infrared spectroscopy and thermal gravimetry, respectively. The properties of tensile and conductivity were also investigated. The lowest surface resistance 42 Ω/cm of the treated PET fibres was obtained when the CS concentration was 1.0%.
PL
W pracy zbadano proces osadzania siarczku miedzi na modyfikowanych chitozanem włóknach poliestrowych. Chitozan został użyty jako chelator do absorbowania jonów miedzi, które z powodzeniem mogą inicjować odkładanie siarczku miedzi w etapie osadzania chemicznego. Włókna nasycone siarczkiem miedzi scharakteryzowano za pomocą skaningowej mikroskopii elektronowej, dyfrakcji rentgenowskiej, spektroskopii w podczerwieni i grawimetrii termicznej. Zbadano również właściwości wytrzymałościowe i przewodność włókien. Najniższą oporność powierzchniową (42 Ω/cm) poddanych obróbce włókien poliestrowych uzyskano, gdy stężenie siarczku wynosiło 1,0%.
3
Content available remote Influence of FFL-13 Oil on PSA Staple Fiber Properties
Peng H., Zheng G., Sun Y., Wang R.
Autex Research Journal
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2017
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Vol. 17, no. 4
328--333
EN
With the aim of enabling the easy spinning of polysulfonamide (PSA) fibers, FFL-13 oil was successfully prepared. Specific resistance, the coefficient of friction, carding machine, electrostatic, cohesion, scanning tunneling microscopy (STM), and Fourier transform infrared (FTIR) spectroscopic analyses were conducted in this study. Results showed that increase in oil concentration, ambient temperature, and humidity induces decrease in PSA fiber-specific resistance and gradual increase in the antistatic property. Relatively high oil concentration and ambient humidity may cause fibers to become sticky and show increased roller winding. As oil concentration increased, fiber cohesion increased and fiber gliding properties showed an initial increase and subsequent decrease. The ideal oil concentration was determined to be 0.6%. This study proves that STM may effectively be used to determine the optimal oil concentration.
4
Content available remote Genetic algorithm for band gap optimization under light line in two-dimensional photonic crystal slab
Jia W., Jiang L., Li H., Zheng G., Li X.
Optica Applicata
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2009
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Vol. 39, nr 3
481-488
EN
An optimization algorithm is used to design a two-dimensional photonic crystal slab for large absolute band gaps under light line. In this procedure, the unit cell of the crystal is composed of a number of circular holes in silicon substrate arranged in hexagonal lattice. By optimizing the location and radius of circular hole in the unit cell, we present four designs considering different circular hole numbers. The genetic algorithm finally yielded a photonic crystal with an absolute common band gap of 0.0788(2c/a) at the mid-frequency of 0.3714(2c/a).
5
Synthesis and Catalytic Activity of Square-Planar Ni(II) Complexes of Bis-N,N'-disubstituted Oxamides and Related Ligands for Epoxidation of Olefins
Zheng G., Wang Q., Yan S.
Polish Journal of Chemistry
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2004
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Vol. 78 / nr 1
19-25
EN
Four new monomeric square-planar nickel(II) complexes of two bis-N,N'-disubstitute oxamides and related ligands have been prepared and characterized, namely [NMe4]2[Ni(L)]_xH2O, where L = dbopba = 3,5-dibromo-o-phenylenebis-(oxamate) and dbmeopba = 3,5-dibromo-o-phenylenebis-(N_-methyloxamidate), L = meopba = 4-methyl-o-phenylenebis-(oxamate) and memeopba = 4-methyl-o-phenylenebis-(N_- methyloxamidate).NMe4 is thetetramethylammonium cation. Based on elemental analyses, IR and UV spectroscopies and molar conductance data, the complexes are proposed to have a square-planar structure. Their catalytic activities for aerob
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