亂數函數 的英文怎麼說
中文拼音 [luànshǔhánshǔ]
亂數函數
英文
randon number functions-
Information technology - security techniques - hash - functions - hash - functions using modular arithmetic
信息技術.保密技術.雜亂信號函數.使用模數計算的雜亂信號函數A novel digital image scrambling method based on the function transform
一種基於函數變換的數字圖象置亂新方法The interpolation of scattered data by multivariate splines is an important topic in computational geometry
利用多元樣條函數進行散亂數據插值是計算幾何中一個非常重要的課題。For h - d scattered data, local weighted least - squares fitting ( llsf ) methods for approximation and interpolation are respectively put forward and the latter is got by adjusting weight function in the former case, and the interpolating method is also used to construct hyper - surface models with the radial function. the problem of choosing weight function during local least square approximation is discussed and two good weight functions are given : one with a parameter, the other with no parameter. based on them
二、對非規則區域上分佈的h - d數據，提出了散亂數據超曲面擬合的局部最小二乘逼近法。通過對局部最小二乘逼近的權因子作適當的改進，得到了擬合精度較高的局部最小二乘插值法，還用徑向基函數構造了超曲面模型，找到了一種性質好帶參數的權函數以及另一種有著普遍精度性質的不含參數的權函數，獲得了較好的逼近效果。Two - stage - fitting ( tsf ) method is obtained, which consists of evaluating the function values of regular - grid points by using local weighted least square methods or radial function interpolation, and smoothly and quickly interpolating those points by using multivariate splines. the result is a hyper - surface of c1 or c : continuity
基於上述結果，提出了h - d空間散亂數據超曲面構造二步法，第一步應用局部最小二乘法或局部徑向基函數擬合法插補立方體網格點上的函數值，第二步應用多元樣條光滑快速插值計算，使所得超曲面具有c ~ 1或c ~ 2連續。Our study shows that it is a good choice to apply generalized rational parametric curve to interpolate and fit unorganized data, because it provides higher numerical stability by appropriately adjusting the support of basis functions
最後應用廣義有理參數曲線對散亂數據進行插值擬合，它可以通過調整基函數的支撐域來優化方程的系數矩陣，因此提供了更高的數值穩定性。分享友人