Advanced Materials Research Vols. 926-930

Abstract: The computing power of mobile devices makes it possible to transplant the applications which run on PCs to mobile devices. However, the power is still too weak to meet the requirements for some kinds of applications which are highly in real-time. In augmented reality applications, feature extraction, as well as feature matching is critical. In this paper .we focus on the part of feature extraction, and modify SURF as an example to fit the hardware characteristics of mobile devices. To solve the mismatch between the small cache size and the data access pattern. We proposed the content-aware tiling based SURF according to the small cache capacity. Experiments show that the accelerated SURF achieves a 1.5x-1.7x speedup without sacrificing recognition accuracy.

Abstract: The kinematic transmission property and distributions in workspace of a novel spherical 3-RRR parallel mechanism are given. The orthogonal layout feature of the parallel mechanism is described. The equations for inverse displacement and kinematic transmission property are derived by the relation of geometry. The kinematic transmission evaluation index of a spherical 3-RRR parallel mechanism is defined. Finally, the distribution of the index in workspace was given, which can provide theoretical basis for the application of the spherical mechanism.

Abstract: Coal flow in the tunnel face during transport produce large Amounts of coal dust, coal dust most of the spay to reduce dust technology, and now most of the single-sensor acquisition of the Entire roadway dust concentration, poor control of water spray for this design uses two sensors collect coal dust concentration of dust, the use of belt scales capture coal traffic, stop the use of open-OFF sensor acquisition device, the multi-sensor data fusion technology to the design, the use of adaptive weighted data fusion, control of well water spray, dust down while within the state.

Abstract: The direct extrusion process by using a newly designed die with different angle and feeder plate numbers has been simulated to systematically investigate the effects of different geometric parameters angle and feeder plate number on the strain distribution, the load and the axial hole defect. The simulation results show that the extrusion process with multiple feeder plate die is similar to that of the extrusion for many times. The angle and feeder plate make the material flow more fluently and ameliorate the axial hole defect. The larger angle reduces the load while the feeder plate increases it. Suitable geometrical parameters can significantly enhance strain in workpiece.

Abstract: High wind speedandloudnoise usually occur in the hydropower station spillway tunnel, which will impact the producing environment of operators. In this paper, turbulent model and VOF modelwere combinedto simulate wind speed and the volume of ventilated airin ventilation holeandthreeaeratorsin the spillway tunnel on the right bank of a hydropower station in China. The results show thatVOF modelcan well simulate ventilated air induced by water drag, andthe volume of ventilated air in ventilation hole is the largest.Wind speed distribution on the longitudinal sectionof the inlet of ventilation hole is non-uniform,and loud noisewill occurthere. Wind speed on the left side of three aerators is higher than that on the right side. The results of the volume of ventilated airin threeaerators simulated by VOF modelare credible, but we should improve the VOF model to more accurately simulate aerated flow.

Abstract: on the basis of discussing virtues and defects of traditional ocean wave spectrum modeling method, this paper proposes a new method for accurate real-time ocean wave simulation. It builds the basic ocean wave model based on improved Gerstner wave. To resolve contradiction between accuracy and real time, it deduces discrete FFT algorithm model of ocean wave, and acquires parameters needed in ocean wave FFT model by sampling wave vector spectrum. The result of simulation proves this method is feasible and effective.

Abstract: The paper designed one LAN resources search platform, and established the search technology, including crawling documents from the web site, parsing, and then indexing, publishing search, building the user interface to the entire process. The LAN resources search platform provides users with network resources retrieval service well.

Abstract: Accurate extraction of time-frequency features for blasting vibration signals has great significance for blasting seismic exploration, so time-frequency analysis method for blasting seismic signals was researched based on frequency slice wavelet transformation technology, and separation and extraction of time-frequency features were were successfully achieved. Frequency slice wavelet transformation can be introduced into blasting vibration effect analysis fields, it can provide a new research idea for refinement analysis of time-frequency characteristics, and it also has great significance for improving the effect of blasting seismic exploration in China.

Abstract: The control object is the temperature of pre-cooling machine, combined the advantage of neural network and genetic algorithm (GA). Adopting GA controller based fuzzy neural network. The controller doing the fuzzy reasoning to the difference of given temperature and sample temperature. GA does the offline training to the Connection weights and Membership function of fuzzy neural network, then uses BP algorithm to do further adjust online for parameters. Simulation result shows that the new controller achieves better control effect compared with traditional PID controller, fuzzy controller.

Abstract: We tackle a series of traffic rule optimizing problems employing the cellular automata theory. In the modeling process, we introduce the notion of moderation probability to describe the influence exerted by driver, which makes our models more in line with the actual. We attempt to generalize our model. During our research, we discover a principle, which we call the lane change principles of adjacent lanes. Thus, our method is of universal meaning.