Applied Mechanics and Materials Vols. 513-517

Abstract: In this paper, a method to generate the humanoid robots gait intelligently is put forward to solve the problem of poor performance of robot walking. The key idea in this proposed method is to adapt the transmutative humans gait to robot walking. Firstly, the character of the humans gait is acquired by researching a mass of gait data. Then, the typical gait signal is obtained which can be used to generate various gait signals. Finally, this method is proved to be effective by comparing the nature signals and the signal which is obtained by this method.

Abstract: Hot-spot calculation of structure parts in large power transformer has been concerned by transformer designer and researcher. The key is the calculation of leakage magnetic field, loss and temperature rise in structure parts of transformer, belongs to the calculation of the electromagnetic-thermal coupling field. This paper calculate and analysis electromagnetic field and temperature field of a transformer tank using ANSYS analysis software based on electromagnetic fields, heat transfer theory, and the results and the test data are in good agreement; aim at the problem of local overheating, appropriate magnetic shields are used to reduce the stray losses and hot-spot temperature-rise in transformer structure parts. so the calculation method can be applied engineering design.

Abstract: The Chan-Vese (C-V) active contour model has low computational complexity, initialization and insensitive to noise advantagesand utilizes global region information of images, so it is difficult to handle images with intensity inhomogeneity. The Local binary fitting (LBF) model based on local region information has its certain advantages in mages segmentation of weak boundary or uneven greay.but , the segmentation results are very sensitive to the initial contours, In order to address this problem, this paper proposes a new active contour model with a partial differential equation, which integrates both global and local region information. Experimental results show that it has a distinctive advantage over C-V model for images with intensity inhomogeneity, and it is more efficient than LBF.

Abstract: For a medium air-cooled asynchronous motor, the physical model of cooling air inside the motor was established to research the air flow distribution and characteristics of the internal flow of the medium motor. By the finite volume method according to the computational fluid mechanics (CFD) principle, the three-dimensional turbulent flow field in computational domain was simulated numerically using boundary conditions of the pressure inlet and outlet obtained from engineering calculations. From the result, the thermal field of stator and rotor was calculation. The results show that the wind speed of cooling air duct which near the both ends was higher than the middle. It causes the temperature of the motor which near the both ends was lower than the middle part. The maximum temperature rise of the motor appear in the middle of the upper windings, and the specific value was 74K.

Abstract: Two independent 0-10V programmable power supply and protection system are introduced in this paper, using ST 32bit processor STM32F103 as the control chip to receives the voltage output command of the PC, In order to achieve the purpose of stable output, through continuous output sampling for multiple sets of data. use curve fitting algorithm and the dichotomy successively for adaptive adjustment. This scheme also uses the software protection and hardware protection double insurance design, to ensure that the safety of power supply and the electric appliances.

Abstract: A tightly-coupled NFE model combined with Neural network, Fuzzy reasoning and Expert system is constructed in this paper based on the neural network-fuzzy reasoning model by introducing expert system technology. The structure and modeling process of the generalized model are presented, and it is derived in theory that this model possesses convergence property and can be regarded as a category of complete information fusion model.

Abstract: In underground space development, the technique of shield tunnel construction of metro has been a great challenge when it comes to construction in mixed ground. Against this background, it is significant to research the technical features and the impact on surrounding environment caused by TBM. Based on the engineering case of Nanjing South Station to Lukou airport section of Nanjing Metro Line 6, this paper discusses the new shield tunneling technology Ground Pass Shield Tunneling (GPST) which has been first applied in China. In addition, the numerical analysis of the settlement control of a specific section is also discussed. From this case, suggestions about tunneling in mixed ground are presented to facilitate further utilization of shield method in similar ground conditions.

Abstract: The analysis of magnetic coupling resonance based on Mode Coupling theory is often complicated and abstract. Moreover, this theory is inconvenient when it comes to designing the circuits. Based on the mutual inductance in the circuit, we completed theoretical derivation, parameters calculation and circuit simulation for each of the two-coil and the four-coil structure. The received power and the transmission efficiency under different conditions are analyzed and compared. Experimental results show that too high or too low resonant frequency will affect the efficiency of transmission and reception of energy in the two-coil structure, a problem of optimal distance for energy transmission is existed in four-coil structure, the resonant frequency of the system will also affect the distance.

Abstract: This paper presents a weighted centroid localization algorithm which based on the nearest beacon node. It utilizes Beacon nodes From the unknown node nearest to correct ranging error caused by RSSI distance, Increased unknown node capability which adapt neighboring nodes distributed environment. Improved the positioning accuracy,. Simulation results indicate that the Positioning accuracy of Improved Algorithm which is Proposed in this article has been significantly improved, the highest Enhanced can up to 30%.

Abstract: Based on the current seismic codes, the elastic capacity calculation under frequent earthquake and ductile details of seismic design should be used for both seismic design of new buildings and seismic evaluation of existing buildings to satisfy the seismic fortification criterion, namely/no damage under frequent earthquake, repairable under moderate earthquake, and no collapse under severe earthquake0. For the evaluation, rebuilding and extending of existing structures which dissatisfy the ductile details of current seismic codes, the elastic capacity calculation under frequent earthquake is obviously not enough. In this paper, the advanced performance-based seismic theory is introduced while story drift ratio and deformation of component are used as performance targets to solve the problems of seismic evaluation and strengthening for existing reinforced concrete structures.