Age 3 + ) all the cubes are connectable and can rotate to create different models . develop logical thinking , motor skills , patterning and creativity . can be used with the eva cube board 适合三岁或以上)立方体的五面均可连接其他立方体，又可转动方向，小朋友甚至可创造较高层次的几何模型，有助学习数目、分类、次序和图案设计。可配合软垫玩耍。
After the topological structure of machine system and the method of conversion of coordinate are introduced , 3d model of the manipulator had been set up in pro / e . in the process , several problems had been solved , such as simplification of part model , assembly , idealization of rub disc movement decomposition organization 在介绍了软件中机械系统的拓扑结构和坐标变换的方法后，在pro e中建立了机械手的3d模型；解决了模型建立过程中的零件模型的简化、零件的装配、摩擦圆盘机构的理想化、模型中电动机的转动方向等问题。
Base on the model founded , this paper assessed the ride performance by analyzed the root mean square value of power spectral density of acceleration of z - axis and round y - axis rotation acceleration at the driver ’ s seat . the root mean square value of suspension working spaces and dynamic tyre loads were also analyzed . base on the assessing system of vehicle ride performance , the root mean square 根据模型建立的实际情况,对车辆标准载荷情况下的平顺性指标进行了计算,对人体感受到的振动采用了垂直方向和绕横轴转动方向的加权振级来评价,计算了车辆悬架系统的动挠度均方根值和各车轮相对动载荷均方根值的情况,全面的评价了车型的平顺性。
The results of the experiment show that the synthesized index , unsteady index and steady index inflect the stability margin of the compressor well . and show that the insert - board experiment can get the enough weight in the synthesized index . and also show that the low - press - area of the steady total - press moves along the rotor circumvolving direction 试验结果表明,综合畸变指数,动态畸变指数,稳态畸变指数对压气机稳定性有很大作用;同时试验还表明,插板能够产生较大的动态畸变指数分量;稳态压力图谱低压区随着转子转动方向转动;以及其他一些有益的结果。
