piecewise approximation

PAA ( Piecewise Aggregate Approximation) is a method for representing time series by sliding an equal-width window on the data and dividing the data into segments.

滑动聚集平均近似PAA（Piecewise Aggregate Approximation）是一种表示时间序列的方法，它通过时间序列上滑动一个等宽的滑动窗口将时间序列分成小的区段。

The internal and surface cracks in rolls were detected with magnet as exciting source. Quantitative detection of cracks was realized by the establishment of mathematical model according to magneton theory and quantitative analysis of crack signals based on the piecewise cyclic approximation of neural network.

以磁为激励源进行轧辊表面及内部裂纹缺陷的检测，基于磁荷理论的裂纹数学模型的建立和神经网络的分段循环逼近的裂纹信号定量分析，实现了裂纹无损定量检测。

Piecewise polynomial Approximation of Rational Curves and Surfaces

有理曲线和曲面的分片多项式逼近

Simulation results show that with complexity greatly reduced, piecewise linear approximation algorithm achieve a performance very close to that of the BP algorithm.

仿真结果表明，曲线折线化算法在复杂度大幅度降低的情况下性能接近BP算法。

Propose an envelope lower-bounding algorithm based on piecewise aggregate approximation.

提出了基于分段聚合近似的包络线下界算法。

The amplifier realizes a piecewise approximation to an exact logarithmic response.

这种放大器实现了对数响应的分段近似，同时作为信号解调的一部分。

Piecewise average approximation is used to reduce dimensionality and slipping window combined with MBR to implement subsequence matching. R+-tree is taken as multi-dimen-sional structure to improve indexing efficiency.

通过采用序列分段平均值技术降维，结合滑动窗口和MBR方法实现子序列相似查询，并利用R+-树作为多维索引结构提高检索效率。

Piecewise approximation state space models of distributed parameter liquid pipes

分布参数液体管道的分段近似状态空间模型

The Property of Piecewise Smoothness of Moreau-Yosida Approximation for a Piecewise C~ 2 Convex Function

分片C~2凸函数Moreau-Yosida逼近的分片光滑性质

A Piecewise Linear Approximation Based on Vector Slope

基于矢量斜率的分段线性拟合

This result can be combined with subdivision method to obtain a piecewise interval polynomial approximation for a rational surface.

这一结果可以与细分技术相结合，得到有理曲面的分片区间多项式的逼近。