摘要：驱动电机受制于空间限制，其电磁场、温度场、机械场等物理场交叉耦合，是一个难点问题。文章以微型电动车用无刷永磁同步电机为研究对象，通过设计电机参数，建构基于MOTOR-CAD的数字化模型，并对其电磁场、机械场、温度场进行仿真分析。结果表明，驱动电机的磁密在1.6 T至1.9 T之间，定子齿部磁密较大为1.760 T；定子绕组、轭部、齿部的最高温度为69.9、68.3、65.3℃，最高温度主要集中在绕组上；转子铁芯应力最大值为7.742 MPa，转子铁芯位移最大值为0.787 4μm。设计驱动电机完全能够满足工作需求，且具有良好的冷却性能，研究结论可以对微型电动车的驱动系统提供相关的科学参考。

摘要：The rational design of efficient single-atomic(SA)catalysts is essential and highly desirable but impeded by the lack of sufficient acknowledge between structure and *** this end,it is critical to clarify the effect of the coordination structure of active metal centers on the catalytic activities for the design of such ***,we report that different coordination structures of SA Pt catalysts can dramatically influence their activities for anti-Markovnikov hydroboration of *** with the other two coordination structures(Pt-N4 and Pt-O2),the SA Pt species coordinated with three O atoms(Pt-O3)display the highest turnover number value of 3288 for the hydroboration reaction to access the important alkylboronic *** functional theory calculations reveal that a superior catalytic activity can be expected for alkene hydroboration over the three O coordinated Pt species due to the lowest reaction energy(ΔG)limiting step from the reaction phase diagram.

摘要：本文设计研究了FFT算法特征,完成了FFT处理器的方案设计,实现了基于FPGA处理器的各个模块,进行了FFT处理器的软件仿真和硬件测试,验证了设计的正确性。