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Especially the Hall Effect, which is a kind of electromagnetic effects, many materials is studied based on it, such as Hall potentiometer, linear Hall sensor. Now Hall Effect has been applied widely in many scientific fields (measurement technology, electronic technology, automation technology and so on). Therefore, Hall Effect of semiconductor materials and its application are discussed in this paper. Characteristics of semiconductor and semiconductor materials[1-3] Characteristics of the semiconductor −5 6 The resistivity of semiconductor usually is 10 Ω.

38. Compared to result of literature [3], [7] and [8], the parameter calculation equation inducing the model results is completely consistent to the numerical method. In addition, previous studies have shown that when Ge constituents have a value between 35% ~ 40%, the base carrier can achieve maximum mobility that verifies the parameter model is accurate and feasible. Conclusion Based on the analysis of the mechanical theory as the foundation, designed the soccer robot pick the ball institutions optimal design process, found aim function, select design variables and the corresponding optimization algorithm to optimize a complete set of institutions.

Sov. Phys. Uspekhi, 1968, 10(4):509–514. [2] Taflove A, Hagness S C. Computational electrodynamics[M]. Boston: Artech house, 2000. [3] Kärkkäinen M K. Numerical study of wave propagation in uniaxially anisotropic Lorentzian backward-wave slabs[J]. Physical Review E, 2003, 68(2): 026602. [4] Prokopidis K P, Zografopoulos D C. Efficient FDTD algorithms for dispersive Drude-critical points media based on bilinear z-transform[J]. Electronics Letters, 2013, 49(8): 534-536. [5] Mukherjee S, Karmakar S, Goswami C, et al..

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Agroforestry : overview by Alice E Beetz; Appropriate Technology Transfer for Rural Areas (Organization)

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