由于决定方程组是超定的、线性的或非线性的偏微分方程组，完全求解它们非常困难。

Because the determining systems are a linear or nonlinear overdetermined PDEs, it is very hard to solve them completely.

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我们将这些距离测量看作距离限制集，从而构成一个超定的系统方程，适用于最优非线性最小二乘。

We cast these ranging measurements as a set of distance constraints, thus forming an over-determined system of equations suitable for non-linear least squares optimization.

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类似有源像素显示、无缘显示和超微投影仪这类新技术将带来一定的影响。

New technologies like active pixel displays, passive displays and pico projectors will have an impact.

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Two or one! It was, in other words, about the problem of incest, the problem of the over-determination of blood relations and the under-determination of blood relations.

二或一，换句话说，是乱伦问题，是血缘的超定,和不充分决定的问题。

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