In recent years, as more and more vehicles request service from roadside units (RSU), the vehicle-to-infrastructure (V2I) communication links are under tremendous pressure. This paper first proposes a dynamic dense traffic flow model under the condition of fading channel. Based on this, the reliability is redefined according to the real-time location information of vehicles.
View Article and Find Full Text PDFBioprocess Biosyst Eng
September 2018
The antibacterial polymer ɛ-poly-L-lysine (ε-PL) has been widely used as a safe food preservative. As the synthesis of ε-PL requires a rich supply of nitrogen, the efficiency of nitrogen translocation and utilization is extremely important. The objective of this study was to improve the production of ε-PL by overexpressing the ammonium transporter gene amtB in Streptomyces albulus PD-1.
View Article and Find Full Text PDFBioresour Technol
January 2017
The aim of this study was to produce ε-poly-lysine (ε-PL) by Streptomyces albulus PD-1 through solid-state fermentation (SSF) using agro-industrial residues. Maximum ε-PL production (86.62mg/g substrate) was obtained a mixed substrate of rapeseed cake and wheat bran (2:1, w/w) supplemented with glucose (4%, w/w), (NH)SO (3%, w/w), with an initial moisture content of 65%, initial pH of 7.
View Article and Find Full Text PDFA highly efficient and feasible "condensation followed by annulation" synthetic approach was developed to afford a subset of 9-ring-fused quinacridone derivatives on a 10 g scale. Despite the amenable intermolecular hydrogen-bonding ability of these rigid molecules, good solubility in common organic solvents and solution processability into uniformed thin films were achieved. Integrated advantages in the synthesis and properties make these compounds ideal building blocks for high-performance dyes and optoelectronic materials.
View Article and Find Full Text PDFThe effect of surface chemistry on the glass transition of polycarbonate (PC) inside cylindrical nanopores is studied. Polycarbonate is melt-wetted into nanoporous anodic aluminum oxide (AAO) treated with hydrophobic alkyl- and fluorosilanes of varying length. The curvature observed at the nanowire tips is consistent with a contact angle descriptive of polycarbonate-AAO surface interactions.
View Article and Find Full Text PDFA bent ladder-type hexaphenylene with a carbazole core and spiro-linkage is designed and synthesized by using the ortho-linked spirobifluorene. The design eliminates the possibility of forming a positional isomer. As a blue-emitter, the BLHPC shows good thermal and color stability.
View Article and Find Full Text PDF4-Bromo-9,9'-spirobifluorene is facilely synthesized, and from this precursor, two ortho-linked oligo-9,9'-spirobifluorenes, 44BSF and 24TSF, are constructed. Devices with 24TSF as the full-hydrocarbon host material and Ir(ppy)(3) or (ppq)(2)Ir(acac) as the triplet emitter show maximum external quantum efficiencies of 12.6 and 10.
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