[en] Bose-Einstein correlations in W-pair production at LEP are investigated in a data sample of 629 pb^-1 collected by the L3 detector at √s 189-209 GeV. Bose-Einstein correlations between pions within a W decay are observed and found to be in good agreement with those in light-quark Z decay. No evidence is found for Bose-Einstein correlations between hadrons coming from different W's in the same event

[en] The high-intensity ultrasound was applied to the preparation of nanocomposite of polyaniline (PANI) and gamma-zirconium phosphate (γ-ZrP) by intercalation of aniline into γ-ZrP. The intercalation rate was enhanced greatly and the interlayer distance of aniline-intercalated γ-ZrP was determined to be 16.0 A. The intercalated aniline polymerized at low pH during the sonication by initiator (NH₄)₂S₂O₈ and nanocomposite of exfoliation of γ-ZrP in PANI bulk was obtained. The intercalated or exfoliated compounds were characterized by XRD, FTIR, TEM, UV-Vis spectrum, and TG-DTA

[en] Intercalated nanocomposite based on Mg, Al layered double hydroxide (LDH) and poly(vinyl alcohol) (PVA) was prepared using exfoliation-adsorption technique, and characterized by X-ray diffraction and thermal gravimetric analysis. The results suggest that the intercalated species are formed via the re-aggregation of the delaminated LDH lamellar with the interlayer spacing 14.5 A, and the thermal stability of the nanocomposite improved compared with the original PVA

[en] A novel milk-like Cu-thiourea colloid has been synthesized. Nanocrystalline quaternary copper sulfide Cu₂FeSnS₄ was obtained through the Cu-thiourea colloidal precursor cooperative conversion route at low temperature. The samples were characterized by means of X-ray powder diffraction, transmission electron microscopy, scanning electron microscopy, inductively coupled plasma atomic emission spectroscopy, and X-ray energy dispersive spectroscopy techniques. The reaction details and features were described and discussed

[en] The objective of this study is to explore the potential of layered zinc hydroxide nitrate modified with sodium benzoate as nanoparticle in thermoplastic polyester elastomer (TPEE). The organically modified zinc hydroxide nitrate was compounded with TPEE using solution blending method. The nanocomposite structure was characterized by means of X-ray diffraction and transmission electron microscopy. The results showed that the nanoparticle was homogenously dispersed in TPEE matrix, and partially exfoliated structure was formed. The thermal behavior, mechanical and thermal combustion properties of the novel nanocomposite were studied respectively through differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA) and microscale combustion calorimeter (MCC). For the nanocomposite containing 7 wt% nanoparticle, the crystallization temperature evaluated by DSC was increased by 10 °C. The storage modulus at −95 °C measured by DMA was improved by around 26%. The heat release capacity (an indicator of a material fire hazard) from MCC testing was reduced by about 56% (compared to the results of neat TPEE). - Highlights: • We prepare zinc hydroxide nitrate modified by sodium benzoate (SB-ZHN). • We prepare and characterize thermoplastic polyester elastomer/SB-ZHN nanocomposites. • We investigate the thermal and combustion properties of the nanocomposites. • We study the thermodynamic properties of the nanocomposites

[en] A novel sonication method has been successfully developed for the preparation of anthracene nanoparticles. The as-prepared nanoparticles are characterized using transmission electron microscopy, ultraviolet-visible absorption spectroscopy, fluorescence excitation and emission spectroscopy. Nanoparticles prepared with sonication are smaller and better dispersed than with magnetic stirring. Surfactants cetyltrimethylammonium bromide, bis(2-ethylhexyl)sodium sulfosuccinate, sodium dodecyl sulfonate and polyvinylpyrrolidone are used to control the size and morphology. Excimer band is found at 445 and 472 nm and possible mechanism is discussed

[en] Highlights: • Developed a multi-objective model for the combined natural gas network and electricity network. • Taken into account the uncertainty and correlations of wind power in the proposed model. • Presented an improved point-estimation method to solve the combined optimal power and natural gas load flow. - Abstract: With the increasing proportion of natural gas in power generation, natural gas network and electricity network are closely coupled. Therefore, planning of any individual system regardless of such interdependence will increase the total cost of the whole combined systems. Therefore, a multi-objective optimization model for the combined gas and electricity network planning is presented in this work. To be specific, the objectives of the proposed model are to minimize both investment cost and production cost of the combined system while taking into account the N−1 network security criterion. Moreover, the stochastic nature of wind power generation is addressed in the proposed model. Consequently, it leads to a mixed integer non-linear, multi-objective, stochastic programming problem. To solve this complex model, the Elitist Non-dominated Sorting Genetic Algorithm II (NSGA-II) is employed to capture the optimal Pareto front, wherein the Primal–Dual Interior-Point (PDIP) method combined with the point-estimate method is adopted to evaluate the objective functions. In addition, decision makers can use a fuzzy decision making approach based on their preference to select the final optimal solution from the optimal Pareto front. The effectiveness of the proposed model and method are validated on a modified IEEE 24-bus electricity network integrated with a 15-node natural gas system as well as a real-world system of Hainan province.

No abstract available

[en] The distribution of intermittency exponents of a single event in high energy collisions is studied. The relations between intermittency and the number of phase space intervals and multiplicity are obtained. A proper requirement is obtained for correctly studying the dynamical fluctuation of a single event with negligible influence of statistical fluctuations

[en] The controversy in experimental data on the transverse momentum dependence of intermittency at different energies is studied. It is shown that this controversy is due to the appearance of a new component-the jet (or mini-jet) component together with the normal soft one at the collider energies. It is shown that the compensation effect of these two components results in a U shape for the dependence of intermittency indices on the average transverse momentum per event p_perpendicular, which is a good quantity to characterize the relative size of soft and hard components in an event. In a linearization approximation the fraction of the soft component can be determined directly from p-bar_perpendicular