Free Model(自由模型) 说实话,我只用PD95来进行PDM实在有些大材小用,大家应该一眼就能看出PD95可是一款真材实料的面向对象分析与建模工具。
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设备管理系统设计与实现 - docin.com豆丁网 ata Model, CDM)、物理数据模型(Physical Data Model, PDM)、 自由模型(Free Model,FEM)、面向对象模型(Oriented Object Model, OOM)。 其中CDM PDM OOM
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西蒙·莱恩很快找到了合适的工作,成为了一名忙碌的自由职业模型工。
Simon Lane quickly found his niche as a busy freelance model maker.
19世纪的角色模型是基于对自由意志的理解。
The 19th-century character model was based on an understanding of free will.
这次危机不仅是让我们自由地想象其他模型、另一个未来和世界,而是它迫使我们这样做。
The crisis doesn't only make us free to imagine other models, another future, another world. It obliges us to do so.
Conversely, if you get an answer and it doesn't seem to make sense, then you've got to go back and ask, am I violating some of the assumptions, and here you will find the assumption that the particle had that acceleration a is true as long it's freely falling under gravity but not when you hit the ground.
反过来说,如果你得到一个结果,发现似乎是错的,那么你就应该回过头来问问自己,我是不是违反某些前提了,这个模型中,你就发现,只要质点在重力作用下自由下落,质点具有加速度a的前提是正确的,但是落地后就不成立了
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