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对束方法的研究涉及凸分析，线性和非线性规划，非光滑分析等数学分支。
Researches on bundle methods touch upon such mathematical branches as convex analysis, nonlinear programming and nonsmooth analysis.
目的改进回归分析的经典最小二乘估计方法和探讨光滑样条非参数回归分析方法。
Objective To improve on classical least squares estimate of regression analysis and explore nonparametric smoothing spline regression analysis.
对减阻率的分析表明，三种非光滑表面均能起到减小旋成体阻力的作用，总阻力最大减阻效果为5%左右。
The test results indicated that all 3 kinds of nonsmooth surfaces can reduce the drag of bodies of revolution, the maximal reduction rate is about 5%.
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