The emphasis is put on estimating the states and parameters only on the basis of the re-entry on-board measurement data in the absence of trajectory observation data.

重点解决在没有轨道观测数据的情况下，如何利用再入飞行中的测量数据进行状态和参数估值。数据包括体轴角速率和过载，由固连于飞行体的速率陀螺和加速计给出。

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And that's before recognizing recent research on the so-called "End of History" illusion, which suggests we're remarkably bad at estimating how our tastes and preferences (including potential spending behaviors) will change in the future.

WSJ: The Experts: How to Plan for Retirement Expenses