基于加权余量法，本文提出了统一处理某些单步法逐步积分格式的方法。据此，本文还提出了一种高精度逐步积分格式。

A general treatment of some integration schemes of single-step method is given by using weighted residual method and a high precision integration scheme is proposed in this paper.

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实现了一种基于图形处理器的单步光线投射算法，并在此基础上提出了一种基于空间跳跃技术的光线投射算法，以实现加速。

A single-pass ray-casting algorithm is developed based on GPU(graphics processing unit), and on the basis of this algorithm an accelerated algorithm is proposed based on space leaping technique.

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