微表情是一个人试图隐藏内心真实情感却又不由自主流露出的不易被察觉的面部表情。与一般面部表情相比,微表情最显著的特点是持续时间短、强度弱,往往难以有效识别。文中提出了一种基于LBP-TOP(Local Binary Pattern from Three Orthogo...微表情是一个人试图隐藏内心真实情感却又不由自主流露出的不易被察觉的面部表情。与一般面部表情相比,微表情最显著的特点是持续时间短、强度弱,往往难以有效识别。文中提出了一种基于LBP-TOP(Local Binary Pattern from Three Orthogonal Planes)特征和支持向量机(Support Vector Machine,SVM)分类器的微表情识别方法。首先,采用LBP-TOP算子来提取微表情特征;然后,提出一种基于ReliefF与局部线性嵌入(Locally Linear Embedding,LLE)流形学习算法相结合的特征选择算法,对提取的LBP-TOP特征向量进行降维;最后,使用径向基函数(Radial Basis Function,RBF)核的SVM分类器进行分类,将测试样本图像序列的微表情分为5类:高兴、厌恶、压抑、惊讶、其他。在CASME Ⅱ微表情数据库上采用"留一人交叉验证"(Leave-One-Subject-Out Cross Validation,LOSO-CV)的方式进行了实验,可得到58.98%的分类准确率。实验结果表明了该算法的有效性。展开更多
Design and calculation of humid air turbine cycle need saturated humidity and e nthalpy of humid air at 423?K,5?MPa. However, the models proposed by p revious workers are available only up to 373?K,5?MPa. In this pape...Design and calculation of humid air turbine cycle need saturated humidity and e nthalpy of humid air at 423?K,5?MPa. However, the models proposed by p revious workers are available only up to 373?K,5?MPa. In this paper,a method based on Helgeson Model is proposed.The saturated composition o f N 2-H 2O system at 336.15-636.35?K,1.74-25.6?MP a and O 2-H 2O system at 373-533?K,0.99-5.77?MPa are predicte d. The deviations from the experimental data are less than 5%. The p redictions for humid air at 273-372?℃,0.1?MPa are comparable wi th the results using the Hyland and Wexler model. The saturated compositio n and enthalpy of humid air at 473-573?K,5-15?MPa,are also展开更多
基金国家自然科学基金 (No .2 993 6110 ) 国家杰出青年科学基金 (No .2 992 5 616)及江苏省自然科学基金 (No .BK9712 4)资助项目~~
文摘Design and calculation of humid air turbine cycle need saturated humidity and e nthalpy of humid air at 423?K,5?MPa. However, the models proposed by p revious workers are available only up to 373?K,5?MPa. In this paper,a method based on Helgeson Model is proposed.The saturated composition o f N 2-H 2O system at 336.15-636.35?K,1.74-25.6?MP a and O 2-H 2O system at 373-533?K,0.99-5.77?MPa are predicte d. The deviations from the experimental data are less than 5%. The p redictions for humid air at 273-372?℃,0.1?MPa are comparable wi th the results using the Hyland and Wexler model. The saturated compositio n and enthalpy of humid air at 473-573?K,5-15?MPa,are also