Applied Mechanics and Materials Vols. 170-173

Abstract: Considering energy conservation, the tunneling effect of internal global monopole black hole is deeply studied in the Parikh-Wilczek’s tunneling framework. The result shows that the emission of the particle on the event horizon is relation to the change of Bekenstein-Hawking entropy and the spectrum is a not pure thermal one.

Abstract: Distributing artificial targets on the object to be measured is a reliable and common method for achieving optimum target location and accurate correspondence among multi-view images, which are universally adopted in industrial photogrammetry applications. In this paper artificial circular un-coded targets and coded targets are used as reference points, an automatic and rapid algorithm for reference point detection is proposed. Targets are extracted from the images according to their size, shape, intensity , etc. An improved method to identify the ID of the coded target is proposed. The gray scale centroid algorithm is applied to get sub-pixel locations of both un-coded and coded targets. Practical examples show that the algorithm can identify and locate artificial targets in images quickly and accurately. It is robust to the change of projection angles and noise.

Abstract: Currently, the study on GPS height determination is mainly focused on changing GPS geodetic height into normal height by applying to mathematical models to fit a quasi-geoid and calculate the height anomaly value with high degree of accuracy. This paper illustrates the basic principles of Kriging Method GPS Height Fitting, Kriging Method GPS Height Fitting Based on Polynomial Surface, and Kriging Method GPS Height Fitting Based on Wavelet Analysis, and carries out a comparative experimental study by using the measured data of GPS control network. The results show that the fitting accuracy of the collective model based on Kriging Method is better than that obtained only through a single Kriging Method, and the GPS height fitting accuracy obtained through Kriging Method Based on Wavelet Analysis is the most accurate.

Abstract: In order to study the control method of position and attitude of the satellite, a simulation platform is built. The quality characteristics of the target satellite system and the reaction flywheel system are analyzed. The dynamic model of target satellite is built to study its dynamic character. Based on the CAMSHIT algorithm, the attitude and position of the target satellite is measured, and the control method of position and attitude is established by use of jet device and the reaction flywheel. The effectiveness and accuracy of the position and attitude control method are verified by the experiments.

Abstract: This article summarizes the current status technology of sprayed concrete slope vegetation restoration and analysis the key technical issues of restoring vegetation on sprayed concrete slope surface, brings out an evaluation system of the restoration of vegetation, the author had studied and created a suitable structure of vegetation recovery for Sprayed concrete slope, through the engineering practice that can be further large-scale promotion and use, for the industry to provide a new solution.

Abstract: An inner-pipe charging construction can be constituted by putting different materials with different internal diameter on the axis of the rock-gel explosive. Then the explosion velocity can be measured and the effect of inner-pipe to explosion velocity can be analyzed. The results show that explosion velocity of water-gel explosive changes in a mode of rising first and falling later with the increase of inner-pipe diameter and the charging ratio varies with different inner-pipe materials.

Abstract: For improve the efficiency of large inclination diphead excavation, according to the actual construction of field, rock and explosives properties, parameters of smoothing blasting technology for medium deep hole blasting in large inclination rock diphead tunnel is researched, especially improved the blasting parameters of bottom hole and construction technology, present technologies of double bottom hole and casing for disblocking. Experimental study has obtained the good blasting effect, utilization ratio of blasting hole achieved 89.0% on average.

Abstract: High and thin brick chimney in complex environment was successfully demolished by directional blasting. By accurate orientation by theodolite, symmetry directional opening window, used small cut length, lower cut position, appropriate cut height and rational blasting parameters, the chimney dumped accurately according to design direction and eliminate the recoil phenomenon effectively when it down. Sandbags wall putting on ground for reduce the impact of the vibration effect; strictly coverage of the incision position can stop the flying rock effectively.

Abstract: The blasting effect is an important factor to influence the stability of the slope blasting construction, understanding the reasons of the slope instability under blasting construction, taking reasonable effective protective measures, which can greatly reduce slope instability phenomena during the construction. Combining with the 111 national highway (Tanghekou ~Beijing boundary) reconstruction project, through numerical simulation, using strength reduction fem for time history analysis, discuss under blast loads slope's the stress field, displacement field and the spread rule of vibration wave, systematically analysis blasting excavation impact on slope stability summarizing in construction process the question should be pay attention ,which can be a guidance for relevant similar engineering design and construction.

Abstract: To change the low efficiency in manual operation and non-uniform standard current situation in current aviation materials management, design a set aviation material support system based on workflow technology. Research analysis of aircraft equipment supply support and established the workflow technology to aircraft equipment supply support in the life cycle of wood figure and to study every aspect of the life cycle based on workflow model and related theories. Finally, aviation material storage as a example completed the workflow processes of he storage of aviation materials and solutes long complex and varied issues in the aviation materials management business processes ,the results show that the workflow technology apply to aircraft equipment supply support has practical value.