Key Node Discovery Algorithm Based on Multiple Relationships and Multiple Features in Social Networks

Abstract

The key nodes play important roles in the processes of information propagation and opinion evolution in social networks. Previous work rarely considered multiple relationships and features into key node discovery algorithms at the same time. Based on the relational networks including the forwarding network, replying network, and mentioning network in a social network, this paper first proposes an algorithm of the overlapping user relational network to extract different relational networks with same nodes. Integrated with these relational networks, a multirelationship network is established. Subsequently, a key node discovery (KND) algorithm is presented on the basis of the shortest path, degree centrality, and random walk features in the multirelationship network. The advantages of the proposed KND algorithm are proved by the SIR propagation model and the normalized discounted cumulative gain on the multirelationship networks and single-relation networks. The experiment’s results show that the proposed KND method for finding the key nodes is superior to other baseline methods on different networks.

Colorimetric and naked-eye detection of arsenic(iii) using a paper-based microfluidic device decorated with silver nanoparticles

“…This phenomenon can be attributed to changes in the morphology of Ag NPrs and the tendency of silver atoms to deposit on their surface. 28 It should be noted that the amount of adsorption in this band is not related to the concentration of the analyte. At low concentrations of arsenic, the adsorption decreases in the 304 nm band and increases in the 715 nm band, which can be attributed to the fact that the morphology of sensing probes (Ag NPrs, Cys-capped Ag NPrs, Met-capped AgNPrs) did not change at low concentrations of the analyte.…”

“…As time goes on and the redox reaction between arsenic and silver ions is completed, the newly produced silver atoms on the Ag NPrs produce circular nanoplates that change the color of the solution to orange. 28 Despite discoloration of the detection probe solutions aer one hour in the presence of the analyte, no signicant changes in the absorption peak intensity were observed at the 300 nm wavelength. In fact, at the beginning of the Ag NPrs interaction with As(III), AgNO 3 is reduced to Ag atoms deposited on the surface of Ag NPrs, converting the Ag NPrs to Ag NPs.…”

“…These structures have special optical, chemical, and electronic properties compared to spherical AgNPs due to their three sharp heads. 28 However, colorimetric-based sensors in the solution phase have limitations such as the need for trained personnel and complex steps. To develop cheaper, more reliable, and disposable methods with on-site diagnostics without the need for electrical connections, researchers began modifying existing methods or exploring new diagnostic strategies.…”

Metal Halide Perovskite Based Heterojunction Photocatalysts

“…Lu and coworkers developed a Cs3Bi2I9/Bi2WO6 composite for CO2 photoreduction, in which they used in-situ XPS to prove the Z-scheme charge transfer. [59] Specifically, under light irradiation, the electron binding energy of both I 3d and Cs 3d experiences negative shifts compared to those in dark (Figure 8A and B), while conversely, W 4f and O 1s exhibited slight shifts to higher energy (Figure 8C and D), indicating that the photogenerated electrons in Bi2WO6 migrate to Cs3Bi2I9, following the Z-scheme. In practice, however, observations of only a minor shift in binding energy (i.e., in the range 0.1-0.2 eV) are commonly observed, and these are considered too close to the typical instrument and data processing errors.…”

Molecular Targets of Neurotoxic Insecticides in Apis mellifera

“…[97] A2' and T6' were often replaced by other amino acids in certain RDL subunits from Varroa destructor, [82] Bombyx mori [98] or Plutella xylostella. [99] Although substitution at T6' has never been described in NCA field-isolated resistant species, T6' mutation in Drosophila melanogaster RDL suppresses picrotoxin antagonism, [100] suggesting that this threonine plays a critical role in the formation of NCA binding site in RDL. [101] In molecular modelling of RDL subunits from different species (including Apis mellifera) fipronil is erected in the channel pore surrounded by the five M2 segments, the trifluoromethyl group being oriented toward the intracellular compartment.…”