简介:Thepronunciationvariabilityisanimportantissuethatmustbefacedwithwhendevelopingpracticalautomaticspontaneousspeechrecognitionsystems.Inthispaper,thefactorsthatmayaffecttherecognitionperformanceareanalyzed,inculdingthosespecifictotheChineselanguage.BystudyintheINITIAL/FINAL(IF)characteristicsofChineselanguageanddevelopingtheBayesianequation,theconceptsofgeneralizedINITIAL/FINAL(GIF)andgeneralizedsyllable(GS),theGIFmodelingandtheIF-GIFmodeling,aswellasthecontext-dependentpronunciationweighting,areproposedbasedonawellphoneticallytranscribedseeddatabase.Byusingthesemethods,theChinesesylableerrorrate(SER)isreducedby6.3%and4.2%comparedwiththeGIFmodelingandIFmodelingrespectivelywhenthelanguagemodel,suchassyllableorwordN-gram,isnotused.Theeffectivenessofthesemethodsisalsoprovedwhenmoredatawithoutthephonetictranscriptionareusedtorefinetheacousticmodelusingtheproposediterativeforced-alignmentbasedtranscribing(IFABT)method,achievinga5.7%SERreduction.
简介:摘要:结合在分析竖流折板絮凝的工作原理以及相关的工艺特点的基础上,从自身的自来水沉淀池设计以及管理经验出发,重点选择案例分析的方式来探讨了竖流式高效折板反应沉淀池设计运行情况,希望对于今后全方位提升自来水厂的工艺设计水平有所帮助。
简介:摘 要:某污水处理装置高效低氧一体化生物反应池在试运行期间按照设计操作参数进行控制,出现生化池活性污泥沉底、二沉池出水总氮高等现象,通过优化DO、碳源等控制参数,解决了运行中的实际问题。经过一年多的运行,COD平均去除率91.0%,氨氮平均去除率98.8%,总氮去除率69.6%,具有良好的稳定运行效果。