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This paper focuses on the stability issue of discrete-time networked control systems with random Markovian delays and uncertain transition probabilities, wherein the random time delays exist in the sensor-to-controller and controller-to-actuator. The resulting closed-loop system is modeled as a discrete-time Markovian delays system governed by two Markov chains. Using Lyapunov stability theory, a result is established on the Markovian structure and ensured that the closed-loop system is stochastically stable. A simulation example illustrates the validity and feasibility of the results. [ABSTRACT FROM AUTHOR]

The influence of sodium dodecyl sulfonate (SDSN) on the formation of ZnO nanorods from а-Zn(OH)2 was investigated in this paper. The а-Zn(OH)2 precursor was prepared at room temperature using ZnSO4 and NaOH as the reactants and then converted to ZnO nanorods after aging at 80°C in NaOH solution containing a minor amount of sodium dodecyl sulfonate (SDSN). The experimental results and the molecular simulation revealed that the influence of SDSN on the formation of ZnO from а-Zn(OH)2 should be attributed to the adsorption of SDSN on а-Zn(OH)2 surfaces, which inhibited the dissolution of а-Zn(OH)2 in NaOH solution, leading to the formation of the ZnO nanorods with a diameter of 50-200 nm, a length of 3.0-15.0 μm, and an aspect ratio of 30-100. [ABSTRACT FROM AUTHOR]

A facile method was developed to synthesize γ-MnO2 with different structures and surface properties in this paper. γ-MnO2 was prepared by oxidation of MnSO4 with Na2S2O8 at 90°C for 2.0h. γ-MnO2 formed at initial pH 1.0 (M1) and 8.5 (M2) was composed of MnO1.93 • 0.23H2O and MnO1.96 • 0.18H2O, respectively. The higher ratio of pyrolusite in M2 (Pr = 43.90%) than that in M1 (Pr = 24.86%) indicated that compared with M1, M2 would absorb more protons since the planar oxygen atoms in pyrolusite were incompletely coordinated and liable to absorb the protons. Mean while, the higher oxidation valence of Mn in M2 than that in M1 revealed that the Mn atoms in M2 were more liable to draw the electron density from the surface oxygen atoms in hydroxyl groups. The structural and compositional differences between M1 and M2 were the major reasons why M2 possessed a higher surface potential and a weaker ability to absorb Zn2+ions. [ABSTRACT FROM AUTHOR]

ZnO/Ni3ZnC0.7/x% CNT (x = 0, 2, 5, 10) urchin-like structures have been synthesized using a facile method based on metal-organic frameworks (MOFs) and applied as the electromagnetic absorber. The results of the experiments demonstrate that the content of multi-wall carbon nanotubes (MWCNT) has a great influence on the absorbing performance of the hybrid material. Conduction loss, interfacial polarization and ferromagnetic resonance all contribute to the electromagnetic absorption. The urchin-like ZnO/Ni3ZnC0.7/5% CNT composite presents excellent absorbing properties. When the filler loading of ZnO/Ni3ZnC0.7/5% CNT composite in paraffin matrix is only 10 wt.%, a minimum reflection loss of -33.2 dB is achieved at a layer thickness of 4.9 mm. [ABSTRACT FROM AUTHOR]

Background: Nasal NK/T-cell lymphoma is a rare type of lymphoma in Caucasian individuals, but is relatively common in Asian populations. Genetic variants in immune and inflammatory response genes may thus be associated with the risk of developing lymphoma. Here, we investigated the association between immuno-modulatory gene polymorphisms and risk for nasal NK/T-cell lymphoma in a Chinese population. Methods: Analysis of 12 single nucleotide polymorphisms (SNPs) in IL-10, TNF-α, lymphotoxin-α (LTA), and CTLA-4 genes was performed for 125 patients with NK/T-cell lymphoma and 300 healthy controls by PCR-ligase detection reactions. Results: The LTA +252 GA + AA genotypes were associated with increased risk for NK/T-cell lymphoma (OR = 2.96, 95 % CI = 1.42-6.19, P = 0.004 for GA + AA genotype). Haplotype C-G-G-A (TNF-α -857, -308, -238 and LTA +252) also conferred an increased risk (OR = 1.52, 95 % CI = 1.14-2.06, P = 0.005). Additionally, the LTA +252 GA + AA genotype was associated with an even higher risk in populations positive for Epstein-Barr virus (OR = 5.20, 95 % CI = 1.22-23.41, P=0.03 for the GA+AA genotype). Conclusions: Our data suggest that the LTA +252 A > G polymorphism is associated with the risk of developing NK/T-cell lymphoma, especially for Epstein-Barr virus-positive NK/T-cell lymphoma in the Chinese population. [ABSTRACT FROM AUTHOR]