Advanced Materials Research Vols. 217-218

Abstract: The design of a wireless temperature, humidity collecting device, the device through the integration of temperature and humidity sensors SHT11 granary and other places on the temperature and humidity for the collection, and then the data will be collected in accordance with a certain degree of agreement sent through the wireless module, the receiving party to receive unpack the data to calculate the temperature, humidity and the value displayed on the LCD screen. AT89C2051 launch system for the core parts, including temperature, humidity collection, and wireless transmitters. AT89S52 for receiving a portion of the core of the wireless receiver, combined with liquid crystal display, through appropriate software and hardware to deal with anti-jamming design of practical, small-scale collection of wireless temperature and humidity system.

Abstract: The thermal contact resistance between polymer composites and aluminum alloy is the main parameters of thermal control design in the field of space and its heat transfer mechanism is very complex. This work is to combine experimental and numerical approaches to evaluate the nature of thermal contact between polymer composites and aluminum alloy. Thermal contact resistance between carbon fiber reinforced epoxy composites and aluminum alloy 380 was measured experimentally. And based on the finite element method, the simulations on heat transfer between polymer composites and aluminum alloy have been performed and compared with experiment results. The results show that the thermal contact resistance between carbon fiber reinforced epoxy composites and aluminum alloy is not negligible and strongly correlated with pressure.

Abstract: The analysis for structural seismic response is a mechanics foundation of earthquake resistance design and seismic prevention. In the study, we make normal mode analysis on the steel storage shelve by using the finite element method and obtain the top 100 order natural frequencies and modes, then combine with the mode decomposition response spectrum method to get the maximum tensile stress, compressive stress and shear stress of the beams and columns. Compared with relevant provisions of GB 50011-2001 and GB50018-2002, it is verified that the strength and stiffness of the steel storage shelve beams and columns are in line with anti-seismic requirements.

Abstract: Highly ordered closely packed TiO2 nanotubes were successfully fabricated by anodization of Ti foils in ethylene glycol-based electrolytes. For an identified electrolyte, the dependence manner of the nanotube dimension to the anodization parameters, including anodization voltage and time were systematically investigated. The inner diameter depends linearly on the anodization voltage but is time independent. The morphology of the tube is relative to the anodization voltage. The tube length is closely relative to the anodization time. Keeping the anodization voltage, the length will increase with the time rising to an extent and then maintain a relatively steady value. Longer nanotubes will be obtained when the anodization voltage is higher for a determined time. TiO2 nanotube-based dye-sensitized solar cells (DSSCs) were fabricated. The results showed that the conversion efficiency was related to the tube dimension. The optimum efficiency of 4.25% is obtained.

Abstract: Brand equity is an import but fragile asset, which is easy to suffer loss in product harm crises. However, by analyzing cases in China, we found that companies responded to product harm crises differently, implying that they didn’t reach consensus on which response was the best to protect brand equity. This paper concludes that: 1) to resolve defensible product harm crises, defensive strategy is best; 2)to resolve indefensible product harm crises, accommodative strategy is the best; and 3)company reputation plays a positive moderating role when company chooses most appropriate strategy or mixed strategy. These findings could not only help companies to resolve product harm crises effectively, but also provide suggestions for government to improve their quality safety work.

Abstract: In the wireless positioning issue basing on TOA/TDOA, NLOS makes a great impact on the positioning accuracy. This paper presents a particle filtering based improved Chan Algorithm. Considering the case of multiple base stations, in the first step we use Chan algorithm to get the initial location estimation basing on the information provided by the base stations which are divided into subgroups. In the second step, we calculate the contributions of these estimated locations, and then use these contributions in the particle filtering framework to get the MAP of the location. Experimental results show that the improved algorithm can suppress the effect of the NLOS and can get better location estimation than the basic algorithm.

Abstract: One novel, simple and convenient synthetic approach has been proposed to prepare the porous molybdenum disulfide materials by utilizing ammonium tetrathiomolybdate as the precursor and sodium chloride as the template. The as-synthesized products were characterized by X-ray powder Diffraction (XRD), Low-temperature N2 Adsorption (BET method), and Scanning Electron Microscopy (SEM). The characterization results reveal that the as-synthesized molybdenum disulfide material has high specific surface area (253.5 m2/g).

Abstract: Silane treatment has been applied as a chromium free multi-metal surface treatment for its characteristics of corrosion protection. Silane film curing process is one of the most important variables, the effect of curing temperature and time on the corrosion resistance of vinyltriethoxysilane(VTES) film was studied combined with electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). The results showed that the curing temperature and time affect condensation of silanol groups Si-OH in silane films and forming intermediate layer at the silane film/substrate interface, and as a consequence influences the corrosion resistance of VTES films.

Abstract: The continental coal-bearing strata are mainly formed in the flood plain, delta plain and lake shore subfacies. Through the study on the sedimentary cause of differences of rock strength and sedimentary location, the paper analyzes the internal relationship between sedimentary environment and surrounding rock stability based on different coal-forming models. To take an example of Shendong Coal Mine Area, the differences of surrounding rock stability in various sedimentary environments are quantitative analyzed. The paper’s research promotes the combination between surrounding rock stability and sedimentology.

Abstract: The out-of-plane quasi-static compressive behavior of four types of corrugated cores (V-type, U-type, X-type and Y-type core) has been investigated by experiment and FE simulations. By transient dynamic finite element analysis code MSC.Dytran numerical simulations were performed for calculating crushing forces, deformation mode and energy absorption. The FE simulations predict the crush behavior of cores with reasonable accuracy and provide the whole progressive buckling process and deformation modes. Experiment and simulation indicate that the U-type core, V-type core and X-type core structures show excellent crushing resistance performance and energy absorption characteristic. The crush performance of the Y-type core structures is relatively poor because of bending mode.