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Exploring Participants's Willingness to Invest in Crowdfunding Projects
No full text[[abstract]]隨著社群網路的緊密，增加了人之人之間彼此互動的機會，加上在資訊科技的進步以及電子商務蓬勃發展的背景下，透過網路來創業的趨勢日漸興盛，2000年以後開始出現群眾募資的平台。2016年為止，在台灣群眾募資市場年度總金額已達5億元左右，贊助過群眾集資案件的總人數約為35萬人，顯示市場極具潛能。過去關於群眾募資的研究中鮮少使用社會認同理論為基礎發展，群眾募資專案以多數為藉著募資的方式來達到一個明確的目的，廣義來看，每一個專案都可以視為是一種微型創業模式，而創業也就能以企業雛形的角度來看待，因此，本研究運用社會認同理論的觀點並加上消費價值理論來探討參與者對於群眾募資專案贊助意圖與專案推薦的影響。研究結果發現，專案內容相關因素對於消費價值有正向顯著的影響，消費價值與認同對於贊助意圖、專案推薦皆有正向顯著的影響，而消費價值在專案內容與認同之間具有完全中介的效果，意即專案內容會透過消費價值來對認同產生影響，在調節效果的部分，回饋品報酬內容與目標達成率皆對於消費價值具有正向調節的作用存在，而前瞻使用者特性對於消費價值並無調節作用。本研究依照節我提出結論與見解，提供群眾募資專案發起者未來經營的參考建議，也根據本研究的研究發現提出相關研究限制與未來研究方向，供相關研究做後續的發展。[[abstract]]Withthedevelopmentofsocialnetwork,theopportunitiesforpeopletointeractwithothersincreaseandpeoplegetcloser.Furthermore,withthedevelopmentofinformationtechnologyandelectronicbusiness,thetrendofstartingbusinessthroughtheInternethasbecomeflourished.Therefore,therehasbeenaplatformforCrowdfundingsince2000.Until2016,thetotalannualamountoffundinghasreachedtoabout$500millioninTaiwan,andthetotalnumberofsponsorswhofundcasesisabout350,000.Itshowsthatthemarketishighlypotential.Inthepastresearch,itisrarelytostudyfundraisingbasedonthetheoryofsocialidentity.Crowdfundingprojectshaveachievedaclearpurposebymeansoffund-raising.Definedbroadly,eachprojectcanberegardedasamicro-enterprise,anditcanbeseenasanembryonicformofentrepreneurship.Therefore,thisstudyisbasedonthesocialidentitytheoryandthetheoryofconsumptionvaluetoexploretheimpactofparticipants'sponsorshipintentionandprojectrecommendation.Theresultsshowthattheprojectcontent-relatedfactorshaveapositivelysignificanteffectontheconsumptionvalue.Theconsumptionvalueandidentificationhaveapositivelysignificanteffectonthewillingnesstosponsorandrecommendtheproject.Andtheconsumptionvaluehasafullmediationeffectbetweentheprojectcontent-relatedfactorsandidentity.Meaningthattheprojectcontent-relatedfactorswillaffecttheidentitythroughtheconsumptionvalue.Inthepartofthemoderatoreffect,thefeedbackofrewardcontentandgoal-achievingratearebothpositiveandmoderatetotheconsumptionvalue,whilecharacteristicsofpioneerhavenomoderatingeffectontheconsumptionvalue.Accordingtotheresults,weprovideourconclusionandopinion.Thispaperprovidessomesuggestionstopeoplewhowanttoapplyforthecrowdfundingprojectinthefutureandalsoproposesthelimitationofthisresearchandfutureresearchdirections
The Influence of Personal Internal and External Factors on Relationship Marketing in Electronic Commerce
No full text[[abstract]]近年關係行銷受到許多注目，在充滿風險的電子商務環境中，吸引顧客不易，而如何留下顧客便成為相當重要的關鍵。另近年與電子商務及關係行銷之相關研究，多聚焦在社群媒體與交流軟體上，而鮮少著眼於購物商城。基於上述研究缺口，本研究之目的在於了解電子商務中關係行銷的應用，以顧客價值、顧客滿意、顧客信任、顧客忠誠為關係行銷之顯著表現，探索其在購物商城中關係行銷之效用，並加入個人內外影響因子，如：情感依附、口碑影響、個人特質等，以驗證電子商務之個人化應用之功效。本研究選定全台最大的本土入口網站PCHomeOnline之購物商城的使用顧客作為調查對象，調查了303位具有實際網購經驗的消費者，以IBMSPSSStatistics20.0進行資料分析，結果顯示：（１）顧客忠誠、顧客滿意、顧客信任與顧客忠誠間，即使在電子商務環境下，仍存在顯著且正向的影響，且三者間存在中介效果。（２）在個人內外因素中，口碑影響之干擾達到顯著。（３）在個人內外因素中，個人特質之干擾達到顯著影響，但情感依附之干擾並未達到顯著。本研究之成果可以幫助企業了解關係行銷在電子商務之購物商城中的實際應用效果，並強調了顧客價值、顧客滿意、顧客信任至顧客忠誠的演進線，提供企業影響顧客之手段。且在個人內外因素的干擾上做出驗證，再次驗證了在購物商城類型中情感依附的低干擾性，及強調了口碑的重要性與個人特質的影響，對企業資源分配可作為參考，以獲得最佳的效果。本研究最後根據研究結果討論其含義，為學術界及企業界提供些許建議與未來研究方向。[[abstract]]Relationshipmarketinghasbeennotinginthedomainofmarketingfordecades.Attractingconsumershasbeenadifficultprobleminelectroniccommerce,Assuchhowtosustaincustomersisessentialtoe-business.Theresearchofrelationshipmarketinginelectroniccommercehaslittleattentionononlineshoppingmall.Thisstudyusedcustomervalue,customersatisfaction,customertrustandcustomerloyaltyasthesignificantfeaturesinrelationshipmarketing.Thepurposeofthisstudyistoanalyzetherelationshipamongtheseimportantmarketingindicators.AndtofurtherestablishtheInfluenceofpersonal-internalandexternalfactorsononlineshoppingmall.Theempiricalsurveyinvolvedasampleof303participantswhohadexperiencedvariouskindsofonlineshoppingformPCHomeOnline.IBMSPSSStatistics20.0wasappliedfordataanalyses.Resultsshowedthat:(1)customervalue,customerSatisfaction,customertrustandcustomerloyaltyaresignificantlyrelatedtotheonetothenextinelectroniccommerce,andcustomersatisfactionandcustomertrusthavecriticalmediatingroleinthispath,(2)positiveandnegativewordofmouthhavesignificanteffectonthecausalrelationshipbetweencustomersatisfactionandcustomertrust,respectively,and,(3)personaltraitshaveamoderatingeffectonthecausalrelationshipbetweencustomertrustandcustomerloyalty,and,(4)emotionalattachmentshownosignificantmediatingeffectonthecausalrelationshipbetweencustomervalueandcustomersatisfaction
The Design and Development of Minimalist Style Drip Coffee Maker
No full text[[abstract]]鑑於咖啡文化在台灣已蔚為風潮，而咖啡機更是咖啡愛好者們，不可或缺的家電，再者現代的生活型態漸趨複雜的社會裡，人們尋求生活的簡樸、精神的內斂，而極簡風格以理性為訴求的思維，符合了現代人冀望的精神上的平靜，因此本研究以產品設計與開發的面向深度探討美式咖啡機創新的可能性，展現極簡風格的外在形態與內在精神在創新性的美式咖啡機上。本研究透過文獻分析法、問卷調查法、TRIZ等研究方法，探討極簡風格造形特徵與美式咖啡機設計開發相關要素，研究結果發現：其一，從文獻探討中發現極簡風格並非只有造形上的簡化，其是現代主義的延續，以減去不必要元素為出發點，不管是在造形上、結構上或是機能上皆是如此。其二，問卷結果顯示極簡風格的造形特徵當中，整體顏色是以冷色系、高明度、單一色相與調和色為主；整體外形是以幾何、對稱且圓滑的邊角處理為主；整體材質是光滑、一致且不透明的。其三，從個案研究中發現美式咖啡機突顯出設計上有「水量與咖啡量的配合不易」、「內部管路複雜」、「只能透過按鈕來操作」三項缺點，而上述的問題，在TRIZ方法下可以使用「容易製造」、「容易操作使用」與「控制複雜度」三項工程參數做為基礎，提出相對應的改良方案。其四，本研究透過「單壺雙槽」、「蒸氣導水」、「獨立式咖啡粉壺」與「彈簧式開關」的設計，讓美式咖啡機能在造形上具有「簡單幾何形態」、「無過多裝飾線與操作介面」；機構上具有「減少內部管路的複雜度」、「減少多餘控制元件」；操作上具有「水量與咖啡量容易配合」、「咖啡粉容易放置」、「啟動方式直覺」、「咖啡渣清理方便」優點，希望透過此產品開發型之論文讓未來以相關議題為目標之研究人員或設計人員做為參考之用。[[abstract]]Nowadays,coffeeculturehasalreadybeenpopularinTaiwanandcoffeelovershavealsoregardedcoffeemachineasoneofthenecessaryhomeappliances.What’smore,inthemodernsocietywiththeincreasinglycomplicatedlifestyle,peoplewouldliketopursuethesimplicityofthelifeandtheintroversionofthespirit.Owingtotheembeddedrationalthought,theminimaliststylehasfullyconformedtothespiritualcalmnessthatpeoplearealwayseagerfor.Therefore,thisresearchdiscussedthepossibilityofinnovationinthedripcoffeemakerfromtheperspectiveofproductdesignanddevelopmenttopresenttheexternalpatternandinternalspiritoftheminimaliststyleontheinnovativedripcoffeemaker.Thisresearchadoptedtheresearchmethodsofliteratureanalysis,questionnairesurveyandTRIZtodiscussthemoldfeatureofminimaliststyleandtheelementsrelatedtothedesignanddevelopmentofthedripcoffeemaker.Theresearchresultsshowthat:Firstly,itisfoundinliteraturereviewthattheminimaliststyleisnotmerelythesimplificationofthemoldbutthecontinuationofthemodernismanditisaimedtoeliminatetheunnecessaryelementsofthemold,structureandthefunction.Secondly,theresultofthequestionnaireshowsthatthemoldingfeaturesoftheminimaliststylemainlyconcentrateonthecoolcolors,highlight,singlehueandthecompoundcolor;themoldfocusesonthegeometric,symmetricalandthesleekcorners;thematerialsaresmooth,consistentandopaque.Thirdly,thecaseanalysisshowsthattherearethreeshortcomingsforthedesignofthedripcoffeemaker,including“thedifficultyinmaintainingthebalancebetweenthevolumeofwaterandcoffee”,“thecomplexityoftheinternalpipeline”and“thesingleoperationofbutton”.Accordingtotheabove-mentionedproblems,undertheTRIZmethod,thecorrespondingimprovementprogramshavebeenproposedbasedontheparametersofthreeprojects,namely,“easymanufacturing”,“easyoperation”and“complexitycontrol”.Fourthly,withtheassistanceof“singlepotandtwogrooves”,“importingwaterwithsteam”,“independentcoffeepowderpot”and“springtypeswitch”designs,thepatternofthedripcoffeemakerhasthe“simplegeometricpattern”andhasno“toomanydecoratinglinesandtheoperationinterface”;itsstructurecanreduce“theinternalpipelinecomplexity”and“thesparedcontrolcomponents”;itsoperationisfeaturedwithadvantagesof“achievingthebalancebetweenthevolumeofwaterandcoffee”,“placingthecoffeepowdereasily”,“startingupdirectly”and“cleaningthecoffeegroundsconveniently”.Itishopedthatthisthesisontheproductdevelopmentwillprovidereferencefortheresearchersordesignersmajoringintherelevanttopicsinthefuture
Design and Implementation of Adjustable Length of Leg Orthosis
No full text[[abstract]]對於小兒麻痺患者，使用支架輔具成為日常生活上不可或缺的一部分，由於患者多數自年幼需配置輔具，但隨著年齡成長，肢架輔具須不斷更換，加上支架輔具一般只能固定腳，而沒有動力輔助功能。本論文主要以因小兒麻痺病患為主，再以現有支架輔具分析與問卷訪談病患作為研究與設計基礎，進行肢架輔具設計，並以SolidWorks電腦繪製軟體繪製輔具模型，藉由SolidWorks軟體裡的工具進行測試，定案後進行加工製造。在支架輔具設計時，加入可調整式機構與儲能裝置，使用者能更輕易調整長度與具有支撐效果，初步完成的支架輔具後，找測試者進行輔具測試，而測試內容包含行走與坐下。[[abstract]]Forpoliomyelitispatient,usingassistivedevicesbecametheimportantpartoftheirdailylife.Duetomostofthemstarteduseorthosisassistivedevicesearly,however,astheygrowolder,theorthosisassistivedeviceshavetorenewoften.Inaddition,orthosisassistivedevicesjustfixedonfootsgenerally,butnotthefunctionofpowersupport.Thisthesisismainlybasedonpoliomyelitispatient,usingexistingassistivedevicesoforthosisanalysisandquestionnairesthepatient,asthebasisofresearchanddesign.Inordertocarryonthedesignofassistivedevices,throughSolidWorkswecouldcomputergraphicssoftwaretodrawamodel,withSolidWorkssoftwareinthetoolfortesting,afterthefinalizationofthemanufacturingprocess.Inthedesignoftheorthosisassistivedevices,theadjustablemechanismandtheenergystoragedeviceareadded.Theusercaneasilyadjustthelengthandthesupporteffect.Afterthepreliminaryorthosisassistivedevicesarefinishedthetesterswillcarryouttheorthosisassistivedevices.Thetestisincludingthatactionofwalkingandsitting
Regressive Model Representation and Quantization Factor Prediction of ECG Data Compression
No full text[[abstract]]現今不管在台灣、日本和韓國等已開發國家皆已進入高齡化社會，老人的疾病預防和健康照護是未來醫學的一重要課題，其中心電圖(Electrocardiography；ECG)訊號的長時間紀錄是重點項目之一。由於心電圖資料量龐大，如何方便長時間感測心電圖訊號並進行即時資料壓縮乃成為研究人員極欲達到的目標，穿戴式裝置是目前最有效益的方案。穿戴式裝置有三個基本要求：低功耗、體積小與重量輕。為了滿足上述需求，我們於先前研究中開發了一個具品質保證機制的小波心電圖資料即時壓縮系統。此系統由三個主要功能方塊所構成：小波轉換、具品質保證機制的量化器和無失真編碼。資料壓縮的核心處理是使用一個由基因演算法最佳規劃的十一階段非均勻量化器，其十一階量化尺度可由單一控制參數產生。品質保證機制則由一失真量測模組和線性追蹤演算法估算新的量化控制參數來實現。此新量化值預測模式使用簡化型頻域誤差指標(SPRD2)，不需要反小波轉換運算，可有效降低軟硬體成本。唯線性追蹤法需要除法運算求斜率，不利於VLSI的實現，本論文利用統計學中的迴歸分析法來克服此問題，首先紀錄所有量化資料於ΔSPRD2–ΔQF的座標空間，再依據誤差範圍將資料切割分類，求得每一區塊的迴歸方程式，此數學模式只需乘法與加法即可計算出斜率，如此一來就能解決除法器的成本問題以及避免大量資料的儲存。本篇研究的改良方法已使用48筆心電圖database進行測試，在結合了誤差計算模組與預設PRD=2%(percentagermsdifference,PRD)的品質控管中完成軟體模擬與驗證，最後也提出預測量化因子之雛型硬體架構，並以硬體語言描述後整理出相關合成數據。關鍵字：ECG、資料壓縮、PRD、迴歸分析、量化因子[[abstract]]InadditiontoTaiwan,Japan、SouthKoreahaveenteredtheagingsociety,andthenationalhealth、medicalaspectsofmoreandmoreattention.Diseasepreventionandmonitoringwillbethefuturetrend.Electrocardiography(ECG)isoneofthekeyprojectsinwhichthesignalrequiresalongrecordandlargeamountofinformation.Thepopularityanddevelopmentofwearingdevices,ECGcompressionsystemhasbecomeanimportantissue.Includinglowpower,devicevolumeanddatacompressionforthethreemajorchallenges.Thisarchitecturerequiresalargenumberofdivisions,andthecostofthedivideristoohigh.SoECGcompressionalgorithmcannotbedirectlyconvertedintoahardwarechip.Thispaperwilloptimizethequantizationfactorpredictionpartandsuccessfullyconvertitintohardwarearchitecture.Thesystemisdividedintothreeblocks:waveletconversion,quantizationandcoding.Inthecompressionprocess,afterthecompletionofthefirstpartofthewavelettransform,thesignalintothequantificationstep.BecauseofECGhasmedicalandmonitoringpurposes,soitsqualitycontrolisveryimportantinthequantitativesystem.Therefore,inthesoftwarealgorithmintoahardwarearchitecturemustalsoachievethedefaultqualitymanagement.Inwhichpredictthequantizationfactoroperation,weneedtocalculatethequantizationfactordividedbySPRD2.Inordertoavoidthedivision,sowefirstdefinethequantizationfactorfortheXaxis,SPRD2fortheYaxis.AndthenusethecoordinateaxestorecordallthequantizationfactorsandSPRD2atPRD(percentagermsdifference,PRD)=2%.AccordingtotheSPRD2rangetocuttheclassification,andapplythestatisticalregressionanalysisineachblock.Andproducethecorrespondingequation.Thisequationonlycontainsmultiplicationandadditionandcandirectlycalculatethetwoparametersofthedivision.Thismethodcansolvethecostofthedividerandavoidthestorageoflargeamountsofdata.Theimprovedmethodofthisstudyhasbeenused48kindsofECGdatabaseintheMatlabplatformfortesting,andallthesignalscancrossthedefaultPRD=2%qualitycontrol.Finally,wealsoproposethebasichardwarearchitectureandsyntheticdataforpredictingthequantizationfactor.Keywords:ECG,datacompression,PRD,regressionanalysis,quantizationfacto
Realization and Research of High Multiplication and High Resolution Frequency Synthesizer
No full text[[abstract]]現今由於電子與通訊系統快速發展，各類頻率合成器與其應用也隨之增加，因此本論文提出二種數位控制之頻率合成器架構，分別是高倍數倍頻器與高解析度頻率合成器。高倍數頻率倍頻器包含五個主要模組，分別為頻率計數器、Inverter_DCO、除法器，強生計數器與飛加器頻率合成器，經由量測輸出頻率最高可達輸入頻率之2097152倍（221），此架構已使用FPGA與台積電0.18um製程實現，電路核心面積為（312.51*312.205）um2。高解析度頻率合成器結合高倍數頻率倍頻器與飛加器頻率合成器之特性，經由小數累加器控制位元技術，來達成細微頻率解析度目標，其頻率解析度最高可達2-24。此頻率合成器已經由FPGA與台積電0.18um製程實現，電路核心面積為（382.335*371.725）um2。本論文所敘述的每個模組皆由數位元件構成，因此可快速地將本論文之架構實現於SOC（SystemonChip）架構。本論文中所使用的數位控制頻率合成器是飛加器頻率合成器（Flying-AdderFrequencySynthesizer），其使用時間平均頻率（TIME-Average-Frequency）概念來合成頻率，經由強生計數器（Johnsoncounter）來產生多相位參考訊號，再藉由小數累加器與多工器選擇不同之輸入週期訊號，達到以時間平均頻率技術完成細微頻率解析度之效果。[[abstract]]Nowadays,variousfrequencysynthesizersandtheirapplicationsincreaseduetotherapiddevelopmentofelectronicandcommunicationsystems.Thispaperproposestwokindsofdigitalcontrolfrequencysynthesizerarchitecture,namelyhighmultiplicationfrequencymultiplierandhighresolutionfrequencysynthesizer.Thehighmultiplicationfrequencymultiplierconsistsoffivemainmodules,namelythecounter,inverter_DCO,divider,johnsoncounterandflying-adderfrequencysynthesizer,whichare2097152times(221)oftheinputfrequencyviathemeasuredoutputfrequency.ThisarchitecturehasbeenusedFPGAandTSMC0.18umprocesstoachieve.Thecircuitcoreareais(312.51*312.205)um2.High-resolutionfrequencysynthesizercombinedwithhighmultiplicationfrequencymultiplierandflying-adderfrequencysynthesizercharacteristics,throughthefractionalaccumulatorcontrolbittechnologytoachievethetargetoffinefrequencyresolution.Thefrequencyresolutionisupto2-24.ThisfrequencysynthesizerhasbeenrealizedbybothFPGAandTSMC0.18umprocess.Thecircuitcoreareais(382.335*371.725)um2.Eachmoduledescribedinthispaperiscomposedofdigitalcomponents,sothearchitectureofthispapercanbequicklyimplementedinSOC(SystemonChip)design.ThedigitalcontrolfrequencysynthesizerusedinthispaperistheFlying-AdderFrequencySynthesizer,whichusestheTIME-Average-Frequencyconcepttosynthesizefrequencies
A Local Search Approach for Task Matching and Scheduling
No full text[[abstract]]在這日益普及的異構計算環境(heterogeneouscomputingenvironment)中，工作匹配與排程在分配運算資源方面發揮了關鍵作用。我們主要探討以最小化完成時間為目標之工作匹配與排程問題(TaskMatchingandSchedulingProblem)。由於工作匹配與排程問題已被證實為是一個NP-完備(NP-complete)問題，於是乎有相當多的研究以各種泛用啟發式演算法作為解決此一問題之方案，並試著在合?的計算時間內獲得?人滿意的近似解。在本研究中，我們提出了一種基於執行時期關鍵路徑(Runtime-CriticalPath)的區域搜尋演算法，可以減少其他排程演算法產生的問題解之排程長度。[[abstract]]Techniquesfortaskmatchingandschedulingplayakeyroleindistributingthecomputingresourcesofaheterogeneouscomputingenvironmentwhichhasbecomeincreasinglycommontoday.Weconsiderthetaskmatchingandschedulingwiththeobjectiveofminimizingmakespan.TaskmatchingandschedulingisknowntobeNP-completeinthestrongsense.Sincethisproblemisextremelycomplex,numerousresearcheffortshavefocusedonmanymetaheuristicapproachestoobtainnear-optimalsolutionswithinareasonableamountofcomputationtime.Inthisstudy,wepresentalocalsearchalgorithmbasedonruntime-criticalpath,thatcanreducetheschedulelengthproducedbyanyschedulingalgorithm
Pilot Assignment for PAPR Reduction of PTS-OFDM with Channel Estimation
No full text[[abstract]]部分傳輸序列(PartialTransmitsSequence,PTS)是一種能有效降低正交分頻多工(Orthogonalfrequencydivisionmultiplexing,OFDM)高峰均功率比(Peak-to-AveragePowerRatio,PAPR)的技術，但其缺點是需要傳送額外的旁資訊(SideInformation,SI)供接收端還原訊號。具有通道估測的PTS方法藉由通道估測在接收端將訊號還原，而不需要SI，但其PAPR降減與位元錯誤率效能則依導引訊號不同的分派方式而改變。本論文提出兩種導引訊號偽隨機分派方式以獲得最佳的PAPR降減與位元錯誤率效能，模擬結果顯示我們所提出的導引訊號分派法比其他方法更能有效的降低PAPR，同時位元錯誤率也未因此而增加。[[abstract]]hepartialtransmitsequence(PTS)methodisconsideredasaneffectivePAPRreductiontechniquefororthogonalfrequencydivisionmultiplexing(OFDM)system.However,themajorthrowbackofthegeneralPTSmethodisthatitneedstosendsideinformation(SI)toreceiverfordatarecovery.ThePTS-OFDMwiththepilotassignmentbasedchannelestimation(PTS-OFDM-CE)methodcanrecovertheOFDMsignalbyusingchannelestimationwithoutSI.Inthismethod,thePAPRreductionandbit-error-rate(BER)performanceofthesystemdependsonpilotassignmentpatterns.Inthisthesis,weproposedtwopseudo-randompilotassignmentschemesforachievingbothBERandPAPRreductionperformanceimprovementconcurrently.ThesimulationresultsshowthattheproposedschemesmaintainthesameBERperformance,buthavebetterPAPRreductionperformanceincomparisonwithotherpilotassignmentschemesinPTS-OFDMsystem
Design of Partial Discharge Real-Time Capture System
No full text[[abstract]]局部放電通常發生於絕緣體的內部或表面電場集中區域，會產生化學反應侵蝕絕緣材料使其劣化，並在電場集中區域造成放電效果，最後使絕緣材料崩潰進而導致儀器損毀和危及使用者人身安全。本論文提出一局部放電即時在線監測系統，其系統架構包含FPGA組件、人機介面和類比放大電路等，配合本論文開發的即時在線監測軟體，達到局部放電即時在線監測、記錄與分析的功能。首先將所抓到的局部放電訊號利用FPGA進行資料分析，其分析結果以RS-232傳輸至人機介面及顯示資料。分析的方式包含有FastFourierTransform(FFT)分析、TimeFrequencyMap(T-FMap)分析、PhaseResolvedPartialDischarge(PRPD)分析等，用以分別說明局部放電訊號所對應的特性，藉數據分析來提高系統的穩定性，降低誤判發生機率，並依據實測結果來分析局部放電可能發生的原因，進一步避免儀器設備的損壞與使用者的危險。本系統使用Altera公司的BeMicroCV和BeScope做為硬體基礎，設計類比放大電路倍率和頻寬分別達到10倍和100MHz，並使用高壓局部放電模擬平台來驗證系統正確性。關鍵字:局部放電、在線監測系統、FFT、T-FMap、PRPD[[abstract]]Partialdischargeusuallyoccursintheinsulatororsurfaceelectricfieldconcentrationarea.Itwillproduceachemicalreactiontoerodetheinsulatingmaterialdamagedandcausethedischargeeffectintheelectricfieldconcentratedarea.Theinsulationmaterialdeteriorationresultinstrumentdamageandendangerthesafetyofusersfinally.Thisthesispresentsanon-linepartialdischargereal-timeCaptureSystem.ThesystemarchitectureincludesFPGAcomponents,humanmachineinterface(HMI)andanalogamplifycircuits.Withthereal-timeonlinemonitoringsoftwaredevelopedinthispaper,theon-linemonitoring,recordingandanalysisofpartialdischargecanbeachieved.Inthisthesis,thecapturedsignalofpartialdischargeisfirstlyanalyzedbyFPGA,andtheanalysisresultisthentransmittedbyRS-232toHMIfordisplaying.TheanalysismethodincludesFastFourierTransform(FFT)analysis,TimeFrequencyMap(T-FMap)analysis,andPhaseResolvedPartialDischarge(PRPD)analysis.Theyareusedtodescribethecharacteristicsofpartialdischargesignals,respectively.Bydataanalysistoimprovethestabilityofthesystemandreducetheincidenceofmiscarriageofjustice,basedonthemeasuredresultstoanalyzethepossiblecausesofpartialdischargeandfurthertoavoiddamagingtoequipmentanduserrisk.Thehardwareofthepartialdischargereal-timemonitoringsystemwasdesignedbasedonBeMicroCVandBeScope,andthemagnificationrateandbandwidthofanalogamplifycircuitdesignedtoachieve10and100MHzrespectively.Finally,thehigh-voltagepartialdischargesimulationplatformwasusedtoverifythefeasibilityandpracticabilityofsystem.Keywords:PartialDischarge,On-LineMonitoringSystem,FFT,T-FMap,PRP
Miniaturization of transmission line with arbitrary length and its applications to compact Wilkinson power dividers
No full text[[abstract]]本文提出一任意電氣長度的傳輸線小型化設計方法，將其應用在威爾京生分波器，設計的操作頻率為1.0GHz，在中心頻率時保有傳統型威爾京生功率分配器的特性。本文提出一種縮小傳統型電路的方法，將任意電氣長度、任意阻抗之傳輸線，以ABCD矩陣推導出方程式，並將此傳輸線等效為T型傳輸線，並以馬蹄形耦合線等效此T型傳輸線，此架構是由兩段左右對稱馬蹄耦合線並聯一開路殘段所組成，其中該開路殘段可配合電路的需求設計成一y=jb的落地元件，可有效地增加電路的靈活度。經過相關理論分析以及本文整理的設計流程得到此架構之各項參數，再進行模擬及實作。小型化威爾京生分波器經過理論的分析，決定小型化架構中的電氣長度θ=12°，透過公式得到各項參數後，模擬並實作電路，最終電路的量測結果為反射損耗S_11=-27.65dB、S_22及S_33=-31.694dB，插入損耗S_21及S_31=-3.387dB，兩輸出端之隔離度S_32=-29.591dB，頻寬定義為|S_11|?15dB時FBW=54.57%，電路內面積為351.65?mm?^2，縮小比例為95%。本文提出的小型化威爾京生分波器不僅縮小了面積，在未來也可透過並聯一導納y=jb的方式以取代原本的開路殘段。透過本文的設計流程能方便實現於各種PCB電路板上，達到易設計、成本低廉，電路佈局簡易等優勢。[[abstract]]Adesignofminiaturizationoftransmissionlinewitharbitrarylengthinthisarticle.And,itapplytoWilkinsonpowerdividers.Wilkinsonpowerdividersarewidelyusedtosplitthepowerinmanycommunicationsystemsduetothelowinsertionlossandgreatlyhighisolationbetweenthetwooutputports[1].Thequarterwave-wavelengthtransmissionlinesarenecessarypartsoftraditionalWilkinsonpowerdividers,buttheyalsooccupythelargecircuitarea.Thisthesisispresentedamethodbymeansofreplacingquarter-wavelengthtransmissionlinebytheT-networktransmissionline.Accordingtoreference[2],thespurline’smatrixcanbelisted.And,lettheT-networktransmissionlineequivalenttothespurline.Thestructureiscomposedoffoursetsofspurlinesandopen-endedstubs.Theopen-endedstubcanmodifyitintoatransmissionlinewiththesamefeaturebutwithdifferenttype.Acompactpowerdividerthatoccupies95%areaofthatatraditionalpowerdividerisdesigned.Basedona15dBreturn-losscriterion,themeasuredFBWis54.57%.At1.0GHz,theinsertionlossesare-3.38dB,theinputreturnlossis-27.65dBandtheisolationislowerthan-25dB.Themainadvantagesofthisminiaturizedtechniqueareitscompactsize,simpledesignprocedure,lowcostandnotcomplexcircuitlayout