Advanced Materials Research Vols. 463-464

Abstract: This study took an investigation of what character of these free charged newspaper readers and how this group is structured are needed. This research, in the subject of the readers of Guangzhou Metro, through random sampling selected, received 225 copies of effective papers. This research discovers that, from the point view of characters of free charged newspaper readers as Guangzhou Metro, it is young, but not as wealthy as the publisher alleged, their income only belong to the middle level because most of them are staff and students. Although the crowd is still not high, and they are mainly to reduce the time of reading traditional one, instead of completely change the reading chance and time of traditional newspaper, it is necessary to know further information about the cause of the case and what kind of countermeasures should be taken. Finally, the new readers who did not read newspaper in the past read the free one now. It is not only an attractive point for the free press but also valued for the traditional newspaper to pay attention to.

Abstract: The paper deals with the practical problem of the intelligent weighing and his real solution by means of unprecedented new progression. The project was concerned with handling and weighing goods with different weights of individual items. The basic part of the paper is a demonstration of automatic control of the intelligent process of weighing goods using mostly hardware and software resources by Phoenix Contact and standard DC motor platform. The basic idea of an intelligent weighing is based on the fact that the movement dynamics depends on the weight of the goods handled. In the process of movement control, detailed position and motor current values are measured to calculate the desired weight of the goods to be transported (handled).

Abstract: The single walled armchair (3,3) (BN)xCy nanotubes with different ratios of B, C and N atoms were studied with density functional theory of B3LYP/3-21G(d) combined with the periodic boundary conditions in simulating the ultra long tube model. Different types of twelve models were examined and the diameter, energy, energy gaps and the band structures were obtained. The energy gaps were within 0.203eV to 2.620eV showing semiconductor conductivity. Results show that the energy gap and the band structure depend on both the atom ratio and arrangement.

Abstract: Electro-hydraulic servo system was hard to control with traditional control strategy and RBF-SMC (Radial Basis Function neural networks-Sliding Mode Control) controller was designed for this system. The mathematical model of the electro-hydraulic servo system was analyzed and the neural sliding mode controller was designed, the control law of sliding mode control was based on linearization feedback techniques and estimate parameters with RBF neural network. The simulation shows RBF neural networks can learning the uncertainties and disturbance, RBF-SMC has good control performance of reduces chattering and parameters estimation.

Abstract: The low thermal conductivity and gummy-like characteristic of titanium based materials reduce the tool life of cutting tool significantly when machining using conventional processes. Non-contact machining like electrical discharge machining becomes one of the alternative methods to machine these titanium alloys especially when involving complex shapes and geometry. The use of powder-mixed dielectric (PMD) has been successfully applied in machining moulds and dies steel based materials but limited study has been reported on PMD-EDMing titanium alloys. In the present work, EDMing performance of Ti6Al4V using kerosene dielectric with and without adding multi-walled carbon nanotube is compared experimentally. The effects of three controlled parameters, i.e. Pulse ON Time, Interval Time and Peak Current were evaluated on the machined samples. It is found that addition of multi-walled carbon nanotubes in dielectric shows significant improvement in material removal rate (7%) and surface finish (9%) together with reduction in white layer thickness as compared to plain dielectric without powder.

Abstract: In this article Tio2 thin film Containing dispersed Ag metal particle was prepared by the sol gel method, and the effect of the metal particles on the optical properties such as responsivity, extinction coefficient, plasmonic resonance of the thin films were investigated. UV/Vis optical spectra and Scanning electron microscopy were recorded to characterize the Ag/Tio2 composite films.

Abstract: The paper presents a piece of research carried out at Petru Maior University regarding the realization of a gearbox equipped with a worm face gear on which the sides of the teeth, after heat treatment, were covered with nanostructured multilayers to improve the working conditions in what regards the friction.

Abstract: Sensing with metal nanostructures is one of the most promising applications of nanoplasmonic devices. This paper demonstrated the theoretical simulation studies on the localized surface plasmon (LSP) of Ag nanoshells with a core diameter of 20 nm and 50 nm. The refractive index-sensing properties, such as sensitive band locations of the Ag nanoshells and sensitive spectral features as a function of nanoshell thickness, are investigated. It is found that the thicker Ag nanoshells show higher sensitivity, but the higher-order LSP resonance modes and wide extinction spectra band degrade its response. The optimum thickness is concluded to be 10nm with a sensitivity of 370nm/RIU.

Abstract: Abstract. ZnO nanowires synthesis throught oxidative evaporation of pure zinc powder without catalyst is studied in detail to understand the nucleation and growth mechanisms involved with the so-called “self-catalysis” schemes. The structural features associated with different growth stages were monitored using scanning electron microscopy (SEM), describe the direct observation of the nucleation and growth process. X-ray diffraction (XRD) and energy-dispersive X-ray spectroscopy (EDS) demonstrate that the as-obtained sample can be indexed to high crystallinity with wurtzite structure and only contain Zn and O without the presence of any impurities.

Abstract: Consolidated barium ferrite nanoparticles were expected to obtain better magnetic properties. Sol-gel method was used to produce the barium ferrite nanoparticles. Various calcination temperatures were set to obtain the single phase structure. XRD pattern and SEM image confirmed the nanoparticles with 48.66 nm and 70 nm, respectively. Compacted samples were sintered using microwave sintering and conventional furnace with various temperature and time. Magnetic measurement test shows that microwave sintered samples have better properties. The highest magnetic properties values for microwave sintered sample is obtained at 950°C for 60 minutes with coercivity (Hc) of 5565 Oersted, remanence (Br) of 1537 Gauss and saturation magnetization (Ms) of 37.04 emu/g.