sign function meaning in Chinese
符号函数
正负号函数
Examples
- In order to achieve a computer code with a maximum degree of vectorization , the numerical flux function must be written uniformly with sign function . to get higher order accuracy , the muscl interpolation functions are applied for van leer and roe schemes
Vanleer和roe格式摘要( abstraet )均采用muscl插值使格式具有高阶精度，并采用连续可微的vanalbada通量限制器，使格式具有良好的稳定性和收敛特性。 - The states of the closed loop system moved in the sliding mode band of the time - varying sliding surface globally . reaching mode is eliminated and robustness of the closed - loop system is enhanced . the sign function of the switching surface function is replaced by a saturate function to reduce the chattering
该控制方法使得闭环系统对于任意初始状态都处于滑动模态区内，然后通过结合旋转和平移滑模面的方法，使随后任何时刻的系统状态都处于滑动模态区内。 - Cascade representation is adopted to represent face rapidly to improve the fast face representation from coarse to fine , from simple to complex , and to improve the speed and accuracy of the processing . subsequently , designs of the classifiers are described in three aspects . first of all , some common classifiers are firstly discussed such as sf ( sign function ) , nn ( nearest neighbour ) , adaboost , svm ( support vector machine ) , ann ( artificial neural network ) etc . then appropriate classifiers for face detection and recognition are selected
通过对pca 、 lda 、 gabor和like - harr人脸表示方法的研究，分别为人脸检测和识别选取了较为稳定而准确的人脸表示；初步尝试了利用adaboost分类器进行特征选择从而消除冗余特征，并且提出了采用级联表示方法快速表征人脸，从而实现由粗到精、由简单到复杂的快速人脸表示，这样既提高了人脸的检测和识别的速度，还有利于检测率和识别率的提高。