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Soil erosion is one of the thorniest issues which has brought severe environmental problems such as degradation of water quality and soil productivity. Topographic factor, as known as slope length and steepness factor (LS) plays a vital role in soil erosion model, it is multiplied with rainfall erosivity (R), ground cover (C), soil erodibility (K) and soil conservation practices factor (P) to modelling...
A novel planar wireless power transfer system via magnetically-coupled resonance (MCR-WPT) is presented. It utilizes a transmitter coil array to generate provides consistent power transfer efficiency when the receiver is axially misaligned with the transmitter. In this paper, an optimization scheme is derived by combined use of HFSS/Q3D, Designer/ADS and MATLAB to improve the transfer efficiency of...
In this paper, a fast and accurate analytical method is proposed to analyze the loss and efficiency of switched reluctance machines (SRMs) under various operating conditions. The analyses are applied on a four-phase 16/12 SRM with high power density and wide speed range, which was designed for traction application. A direct method is proposed to calculate hysteresis and eddy current loss without empirical...
This paper presents the high reliability design method for lead-free solder joints on chip components, and that is able to evaluate effect of soldering process for solder joint shape. Coupled analysis of structure analysis and flow analysis was proposed for replication of solder wetting and behavior of electric components at the same time. The analysis methods enable to evaluate complex mechanism...
This paper presents a method mining the worst thermal fatigue life of solder joints on chip components used in vehicle electronics. Thermal fatigue life of crack initiation and propagation were calculated by using the finite element method. Statistical analysis of thermal fatigue life in the solder layer below the chip component was carried out. A sample of dispersed fatigue lives was generated by...
This paper presents a framework of the method of weighted residuals that can be used to generalize time-domain numerical methods. Based on it, evolution of the conventional grid-based techniques to the node-based meshless methods is described. Such meshless methods provide the flexibility of modeling curved interfaces and boundaries. Numerical examples show the effectiveness and validity of the methods.
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