Advanced Materials Research Vols. 143-144

Abstract: In conventional reinforced soil structures, the reinforcements are often laid horizontally in the soil. In this paper, a new concept of grid reinforcement with ribbed inclusions is proposed. In the proposed of soil reinforcement, besides conventional grid reinforcements, some vertical and 3D reinforcing rib are also placed in the soil. Pullout tests are necessary in order to study the interaction behavior between soil and geosynthetics in the anchorage zone. Then, a series of pullout tests are conducted and the various parameters studied in this testing program include rib height and grid size of reinforcement. The result shows that the ultimate pullout force of plexiglass with rib is significantly larger than ordinary ones in the same normal stress. Ultimate pullout resistance increased as the increase of the height of tooth, and also is significantly impacted by grid size.

Abstract: The promulgation and promotion of IEC61850 provide a basic platform for the development of the digital substation. In this paper, the present situations and problems of the digital substation 220KV Baicheng are introduced and analyzed, And some schemes are proposed including the configuration of DF1900 monitoring system in substation layer and DF1925 controlling system in interval layer, and the optimization of communication networks and the access of the electronic transformer.The evaluations of successful transformation are summarized from the reliability and availability and flexibility in the end. From evaluations of the scheme, this transformation makes the reliability and availability of the digital substation 220KV baicheng improve greatly, but also enhances the flexibility of system. Moreover, the transformation also saves much money to purchase equipment of substation, so it also provides a new method to change for a large number of old substations to digital ones.

Abstract: The paper researched the electrical properties of carbon fiber graphite cement-matrix composites(CFGCC) containing carbon fiber 0.5% (mass fraction of cement, the same below) and graphite powder 0%~30%, and the impact of environmental temperature(10~50°C) and relative humidity (20%~60%) to electrical properties of CFGCC by the four-probe method and KSON high and low temperature environmental chambers. The results have shown: the electrical resistivity of CFGCC decreases with increasing the content of graphite; the relationship curve of electrical resistivity and concentration of graphite exists percolation phenomena, the percolation threshold of CFGCC is about 25%; the electrical resistivity of CFGCC have decreased with increasing temperature; the variation rate of electrical resistivity have decreased with increasing the contents of graphite; the electrical resistivity have changed a little as the humidity changed, and the trend is towards smaller as a whole.

Abstract: In this paper, the design and implementation of a 12/10 poles 6-phase switched reluctance generator (SRG) drive system for hybrid electric vehicles (HEVs) is investigated. Firstly, the principle of the SRG, its control parameters and operation characteristics are analyzed. Then, according to the requirements of the SRG using as an integrated starter generator for HEVs, an optimized switch angle position with current chopping control method is proposed to regulate the SRG power output. In order to improve the charge performance and extend the service life, the lead-acid battery group uses a two-stage charge mode, which is realized by two digital power regulators of the SRG. After that, an experimental system is set up and the controller's internal circuit is described. At last, the proposed SRG drive system is verified by experimental results.

Abstract: A visual-based autonomous motion planning algorithm is designed to guide the robot to take the elevator autonomously. The floor chosen operation as well as the path planning and motion control for the robot’s in-out elevator are the two critical issues. A visual-based motion regulation method is proposed in this paper, so is a manipulator motion planning algorithm based on image Jacobian Matrix. Fuzzy logic is used to mobile path planning. Experimental results on humanoid service robot proves the validity of this control system.

Abstract: Redundant data and extra time cost are always exist when the autonomous mobile robot gathers and calculates localization information, using the Nyquist sampling theorem to calculate the sampling time. So an algorithm is studied in this paper, which can dynamically update the sampling period and eliminates the multi-sensor redundant information. Firstly, the observation matrix is renewed timely, according to the real-time state of the robot and the confidence level of sensing information, and the sampling period of sensor can be obtained by the weighted average and normalized method. Secondly, the multi-sensor information will be compressed by the spatial information relevant principle. Simultaneously, the fidelity degree of localization information is monitored timely by the variation function and the compression reliability. Experimental results indicate that this compression sensing algorithm can not only reduce the redundant localization information, but also can guarantee the validity of the localization information.

Abstract: In a supply chain, different companies have different, even conflicting goals and make decisions based on their own profit, so the asymmetric information can be found everywhere. The informed party may withhold or convey wrong information, and the uniformed party wants to get it or verify it. The screening and signaling increase contract cost and decreases supply chain efficiency. Hence, the asymmetric information is the main cause which leads to non-coordination. The information transparency model is built to analysis the game process among the players in the supply chain under the asymmetric information, and the condition of supply chain equilibrium is also discussed in this paper.

Abstract: In this paper, a new genetic algorithm method to optimize the frequency selective surface(FSS) is presented. The optimization speed and definition are promoted by limiting the parameter range and changing the genetic basis. A new cost function is introduced to optimize the multi-frequency of FSS by multi-object optimization (MO). The cirque element was optimized by the optimization method, fabricated by the selective electroless plating on fabric and measured by the arch test system. Test result proves the simulated result coincide with measured result. Result shows that it’s possible to realize different optimizations based on the various applying by this method.

Abstract: In this paper, a method to simulate the absorbing effectiveness of spherical particle absorber is presented and the effect of the diameter of spheres, the number of layer and the stack modes of sphere particle to the absorbing effectiveness were also researched. Basing on the simulation results, an optimal spherical particle absorber was designed. The absorber has 3 layers with 1 mm, 2 mm and 4 mm spheres stacked on each layer respectively. Simulation result shows that the optimal absorber achieves a maximum reflection loss of -15 dB and the bandwidth being lower than -5 dB is more than 16 GHz in 1~18 GHz.

Abstract: This paper introduced a new method for detection of amphetamine based on the Surface Plasmon Resonance (SPR) techniques. Experimental results show that SPR is approved to be a suitable approach for detection of amphetamine due to its unique properties such as label-free, real-time, high sensitivity, etc. By introducing such a SPR detection, 10μg/ml amphetamine could be easily detected and compounds with similar molecular structure are also expected suitable for SPR detection.