简介:提出了一种基于级联投影的高斯混合模型算法。首先,针对不同的特征维度计算高斯混合模型的边缘概率,依据边缘概率模型构造出多个子分类器,每个子分类器包含不同的特征组合。采用级联结构的框架对子分类器进行动态融合,从而获得对样本的自适应能力。其次,在心电情感信号和语音情感信号上验证了算法的有效性,通过实验诱发手段,采集了烦躁、喜悦、悲伤等情感数据。最后,探讨了情感特征参数(心率变异性、心电混沌特征,语句级静态特征等)的提取方法。研究了情感特征的降维方法,包括主分量分析、顺序特征选择、Fisher区分度和最大信息系数等方法。实验结果显示,所提算法能够在2种不同的场景中有效地提高情感识别的准确率。
简介:摘要:在日常的维修和设备保养过程中,经常会遇到GDX2包装机二级联轴器拆卸困难的问题。联轴器的拆卸难题会导致设备维修时长增加,降低设备的有效作业率,影响企业经济效益。故本文针对联轴器拆卸难题进行详细分析,设计一种新型拆卸工装并应用到联轴器拆卸过程中。结果发现,新型工装拆卸联轴器法与传统拆卸方法相比,每次拆卸过程可节约1.93小时,提高了一倍以上的速度,同时提高125%的维修效率,可极大地降低维修成本,达到降本增效的目的。
简介:Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.
简介:Weestablishseveralfundamentalidentities,includingrecurrencerelations,degreeelevationformulas,partitionofunityandMarsdenidentity,forquantumBernsteinbasesandquantumBeziercurves.WealsodeveloptwotermrecurrencerelationsforquantumBernsteinbasesandrecursiveevaluationalgorithmsforquantumBeziercurves.Ourproofsusestandardmathematicalinductionandotherelementarytechniques.
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简介:Theproblemoftherobustfaultdetectionfilterdesignfortime-varyingdelaysswitchedsystemsisconsideredintheframeworkofmixedH_-/H_∞.Firstly,theweightedH_∞performanceindexisutilizedastherobustnessperformance,andtheH_-indexisusedasthesensitivityperformanceforobtainingtherobustfaultdetectionfilter.ThenanovelmultipleLyapunov-Krasovskiifunctionisproposedforderivingsufficientexistenceconditionsoftherobustfaultdetectionfilterbasedontheaveragedwelltimetechnique.Byintroducingslackmatrixvariable,thecouplingbetweentheLyapunovmatrixandsystemmatrixisremoved,andtheconservatismofresultsisreduced.Basedontherobustfaultdetectionfilter,residualisgeneratedandevaluatedfordetectingfaults.Inaddition,theresultsofthispaperaredependentontimedelays,andrepresentedintheformoflinearmatrixinequalities.Finally,thesimulationexampleverifiestheeffectivenessoftheproposedmethod.
简介:目的探讨老年高血压伴有血同型半胱氨酸增高(H型高血压)患者肾功能受损情况。方法将60岁以上原发性高血压263例患者,按血同型半胱氨酸的检验值分为:非H型高血压组、H型高血压1组、H型高血压2组,测定3组病例的24h尿微量蛋白,将3组病例的24h尿微量蛋白进行比较。结果H型高血压2组患者血同型半胱氨酸(24.83±4.00)μmol/L虷型高血压1组患者血同型半胱氨酸(15.73±3.84)μmol/L较非H型高血压组(6.14±3.58)μmol/L显著增高(P〈0.01);H型高血压2组患者24h尿微量蛋白(24.83±4.00)mg/L较H型高血压1组患者24h尿微量蛋白(15.73±3.84)mg/L亦显著增高(P〈0.01)。结论老年H型高血压患者更易发生肾脏损害。