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徐功娣 《上海大学学报(英文版)》2006,10(2):179-184
1Introduction Dyeingwastewaterisakindofindustrialwastewater whichisdifficulttotreat.Itcontainsnotonlyhigh concentrationsofbiggermolecules,e.g.,nitryland aminocompounds,butalsoalargeamountofheavy metals,whicharetoxiccompositionformostof micro organisms.The… 相似文献
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命题:以公式a.=nZ (” 1).b.=”(”2 艺” 2)e.=(” 1)(”2 ” 1)(1)构成的数沮(a。,b,,〔·,。)是海伦数组,且具有如下特征: (l)半周长S:=(” 1)3:(2)面积△,=”了” 1)2(nZ ” l);(3)e二边上的高h。=2”(” 1);(4)。.在e。上的射影,P二~2” !;b,在e,上的射影叭=价(” 2):(5)a。一h,~1,e,一b,=1.其中”~1,2,‘’‘ 证:而证e.>b.)a.,且a, b,一c,=2”(n l)>。,.’.(a。,久,c.)可作成三角形的三边长标入}冲“(1)(2)丫以(几,证略.△.=J‘(s,一。,)(,一6,)(“万万 ~f:(” l):(护 ,: 1)b.,c.)为边的三角形各边长和面积都是整数,二(a.,b.,c.)是… 相似文献
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1Introduction Inamobilecommunicationsystem,themobile phoneusesabatterytosupplyenergy.Sincethebat teryenergyislimited,minimizationofenergycon sumedinprocessingandtransmission[1]inmultimedia communicationbecomesanimportantconsideration.Hereweconsidertransmissionenergy.Twofactors areconcernedwithtransmissionenergy,i.e.,trans missionpowerandtransmissiontime,theformeris basedonchannelcharacteristicandconsumerrequire ments,whilethelatterisdecidedbythenumberof bits.Researchonthesetwotopicshasreceive… 相似文献
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Ionizationconstantsofpolyproticweakacidsarebasicthermodynamicsdata .Undermanycircumstances ,measurementsofionizationconstantsofpolyproticweakacidsareroutinelynecessary ,e .g .,fornewcompounds ,forwell establishedcompoundsatagiventemperaturewherepreviousdataareunavailable,andindifferentsol ventsystems.ThemainmethodsfordeterminationofionizationconstantsreportedinRefs.[1]— [4 ]arecon ductometricmethod ,potentiometrictitrationmethod ,NMRmethodandspectrophotometricmethod .Inthispaper,anewmethodf… 相似文献
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x.写出下列每组中刘线部分有几种读音‘!0% 1 .a一great b.b加ad 0.,相dy d.te此h〔) 2 .a.manv b.water e.have d.cake又) 3 .a.play b.Sund终夕e.,卿d.th岁() 令.a.beth b.zhan e.matjl名d.elothes() 5·a·exCuse b.pute·h:‘rry d.ruler() 6 .a.hearb,ea月ye,Pear d.dor() 7 .a.who。:b·诚en e.what e.动。() 8 .a.front b.otoP c.wholed,whoseL) 9·a·alwa邓b·t以kc·holfd·chalk() 10.a.b讨dge b.orang弓c.j’acket d.Gerlllan()11.选择填空:30%()1 .There 15_“。,,in tho first.枷记. a·ab·anc·thed,I《,2 .Plea旧e’pa… 相似文献
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INTRODUCTIONAfterthedepositionofMunicipalSolidWaste(MSW) ,thebiodegradableorganicfractionun dergoesaseriesofchemicalandbiochemicaldegradation .Basedontheanalysisoftheemit tedgases,fivedistinctphasesofthelandfillanaerobicdegradationprocess,(i.e.,initialadj… 相似文献
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1 Introduction Data miningis currently receiving much research at-tention. Real-life data are frequently i mperfect : Erro-neous ,incomplete , uncertain and vague .In this pa-per , we investigate data incompleteness ,i.e., miss-ing of attribute values .Fo… 相似文献
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Rechargeablealkalinenickelbatteries (e.g.,Ni/Cd ,Ni/Fe,Ni/Zn,Ni/H2 andNi/MH)areusuallypos itivelimited ,sothatthecapacityandcyclelifeofthecellsaredeterminedmainlybytheperformancesofnickelelectrodes.Withtheirhighenergydensityandlowcostrelativetothatofconventionalsinterednickelelectrodes,pastednickelelectrodeshavenowbeenwidelyusedincommerciallyavailableNi/MHbatteries[1 ,2 ] .Asthedis charged stateactivematerialofthepastednickelelec trodes,thepropertyofsphericalnickelhydroxideisthekeytodeter… 相似文献
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Color control of the multi-color printing device 总被引：4，自引：0，他引：4
WANG Xiao-hua XIU Xiao-jie ZHU Wen-hua TANG Hong-jun 《浙江大学学报(A卷英文版)》2006,7(7):1187-1192
INTRODUCTION During the development of printing technology, digital printing has played an important role. Now various kinds of multi-color digital inkjet printers are available. Compared with the conventional digital inkjet printer, the multi-color digital inkjet printer has larger color gamut and can faithfully produce more colors. The conventional color printing devices nor- mally use three or four inks, e.g., CMY, CMYK. Although some adopt more than four inks, e.g., CMYKLcLm, the… 相似文献
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以DSP实现基于概率DP匹配算法的说话人识别系统 总被引：1，自引：0，他引：1
提出了利用概率DP匹配算法进行说话人识别的的设想。并给出了运用TMS320C5416实现说话人自动识别系统的方案。该系统利用一种新的语音信号r阶的倒谱线性回归系数等参数构成识别的特征矢量集，运用提出的概率DP匹配算法进行与文本无关的说话人识别。实验结果表明该系统具有识别精度高、识别速度快，占用系统资源少等特点，是一种有效的说话人自动识别的实现方法。 相似文献
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建立了一个基于HMM算法的非特定人语音识别系统,阐述了具体实现过程,包括预处理、特征参数的提取及模板的匹配.并用MATLAB6.5对整个系统进行了仿真,仿真结果表明该系统可实现对非特定人输入命令词的识别,识别率约为88.6%. 相似文献
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提取语音信号的MFCC特征参数,用矢量量化（VQ）的LBG算法来建立匹配模板.在MATLAB软件平台上,基于GUI界面实现说话人识别系统软件设计,并通过实验验证其有效性. 相似文献
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张强 《天津职业院校联合学报》2007,9(4):85-87
在高职院校纷纷进行分层次英语教学改革的背景下,构建与分层次教学相匹配的教材体系却还处于初级阶段。从学院学生的实际情况出发,论述自主编写适合于英语分层次教学的教材的必要性、迫切性、自编《Warmup》教材的编写思路、使用后的初步效果以及对构建高职英语教材体系的几点设想。 相似文献
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Bahram Vazirnezhad Farshad Almasganj Seyed Mohammad Ahadi Ari Chanen 《浙江大学学报(A卷英文版)》2009,10(10):1461-1475
Speaker variability is an important source of speech variations which makes continuous speech recognition a difficult task. Adapting automatic speech recognition （ASR） models to the speaker variations is a well-known strategy to cope with the challenge, Almost all such techniques focus on developing adaptation solutions within the acoustic models of the ASR systems. Although variations of the acoustic features constitute an important portion of the inter-speaker variations, they do not cover variations at the phonetic level. Phonetic variations are known to form an important part of variations which are influenced by both micro-segmental and suprasegmental factors. Inter-speaker phonetic variations are influenced by the structure and anatomy of a speaker＇s articulatory system and also his/her speaking style which is driven by many speaker background characteristics such as accent, gender, age, socioeconomic and educational class. The effect of inter-speaker variations in the feature space may cause explicit phone recognition errors. These errors can be compensated later by having appropriate pronunciation variants for the lexicon entries which consider likely phone misclassifications besides pronunciation. In this paper, we introduce speaker adaptive dynamic pronunciation models, which generate different lexicons for various speaker clusters and different ranges of speech rate. The models are hybrids of speaker adapted contextual rules and dynamic generalized decision trees, which take into account word phonological structures, rate of speech, unigram probabilities and stress to generate pronunciation variants of words. Employing the set of speaker adapted dynamic lexicons in a Farsi （Persian） continuous speech recognition task results in word error rate reductions of as much as 10.1% in a speaker-dependent scenario and 7.4% in a speaker-independent scenario. 相似文献
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为有效识别浮动验证码,提出一种基于特征匹配与卷积神经网络的识别方法。首先使用特征匹配的方法得到匹配特征点,结合交叉匹配算法与 K 近邻匹配算法滤除错误匹配;然后对特征点进行聚类及投票分析,得到待识别字符区域,将其分割得到单个字符;最后在 mnist 手写数字数据集的基础上加入英文字符,构建卷积神经网络模型,将数据集送入模型进行训练。对 10 000 张浮动验证码进行测试,结果表明,该方法对浮动验证码的识别准确率达 95%,且构建的训练集具有可扩展性,可进一步应用到其它类型的字符识别中。 相似文献
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提出了一种新的语音识别方法,该方法综合了VQ和离散HMM算法,在每个状态通过用矢量量化误差值取代传统的HMM输出概率值来建立VQ-HMM.介绍了VQ-HMM,并通过非特定人汉语数码语音识别实验对其识别性能与传统的HMM作了相应的比较.实验结果表明该方法识别效果优于传统的HMM.,In this paper, a new speech recognition method was proposed, which integrated a VQ-distortion measure and a discrete HMM. The VQ-HMM uses a VQ-distortion measure at each state instead of a discrete output probability used by a discrete HMM. The VQ-HMM is described, and its speech recognition performance is compared with the conventional HMMs through the experiments on speaker-independent Chinese spoken digit recognition. The comparisons confirm that the new method over-performed traditional HMMs. 相似文献
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说话人识别可以看作语音识别的一种,本文研究了MFCC参数的提取方法,并对矢量量化VQ的识别模型进行了讨论,设计出了一种可行的识别方法,通过验证,这种方法对于文本有关的说话人识别,可达到较高的识别率. 相似文献
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自我中心性是指示语的基本特征,但为了达到礼貌等语用效果,指示语的自我中心会发生转移而出现指示语映射现象。借助Leech的礼貌原则,以编码时间、一般现在时和心理时间为参照点,分析了三大类时间指示语映射的礼貌功能。研究发现,时间指示语映射在很多情况下能促进人与人之间的沟通交流,但有时也会让人感觉到说话者不友好或不礼貌的态度。在时态教学中引入时间映射概念能提高学生对时态的理解和运用能力。 相似文献