不幸的是，这些机构的数据总是保存在许多不同的库中，并且反映了许多不同的数据模型。
Unfortunately, the data for these agencies is often kept in many different repositories, and reflects many different data models.
利用面板数据模型研究了机构投资者对董事会效率的影响。
The influence of institutional investors on director board efficiency was studied using the panel data model.
建立了五个自由度偏差的数据模型，并设计出包括CCD自准直仪、CCD接收处理装置、嵌入式计算机和执行机构的自动对接系统。
A mathematical model of five degrees of freedom is established. And an automatic docking system with CCD auto-collimator, CCD signal receiver, embedded computer, and actuating mechanism is designed.
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