Browsing by Issue Date, starting with "2010"

Now showing 1 - 20 of 49046

On the Misconception of Multicollinearity in Detection of Moderating Effects: Multicollinearity Is Not Always Detrimental
(2010)
Shieh, Gwowen
;
管理科學系
;
Department of Management Science
Due to its extensive applicability and computational ease, moderated multiple regression (MMR) has been widely employed to analyze interaction effects between 2 continuous predictor variables. Accordingly, considerable attention has been drawn toward the supposed multicollinearity problem between predictor variables and their cross-product term. This article attempts to clarify the misconception of multicollinearity in MMR studies. The counterintuitive yet beneficial effects of multicollinearity on the ability to detect moderator relationships are explored. Comprehensive treatments and numerical investigations are presented for the simplest interaction model and more complex three-predictor setting. The results provide critical insight that both helps avoid misleading interpretations and yields better understanding for the impact of intercorrelation among predictor variables in MMR analyses.
Improving the E-Store Business Model for Satisfying Customers' Needs Using a Hybrid MCDM Combined DANP with Grey Relational Model
(2010)
Chiu, Wan-Yu
;
Tzeng, Gwo-Hshiung
;
Li, Han-Lin
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
The current paper aims to qualitatively and quantitatively measure and evaluate e-store index criteria used to achieve the aspired levels for satisfying customers' needs. Such research should help e-store managers understand customers' feelings and requirements for improving the e-store business. Therefore, in the current approach, we use a hybrid MCDM model to address the dependent relational problems among the criteria. Specifically, we combine DANP (DEMATEL-based ANP) and grey relation analysis (GRA) methods to calculate the relative importance weights and relation of the criteria between interdependence and feedback. We also propose a strategy to improve the criteria gap for closing to the aspired levels of human life and convenient service. As such, this research can provide e-store managers with an understanding of how to improve business models in order to achieve consumers' needs and promote more repurchases and enable them to devise the best marketing strategies to provide the most effective and efficient service for their customers.
Pre-Treatment of Natural Organic Matters Containing Raw Water using Coagulation
(2010)
Cheng, Ya-Ling
;
Wong, Ruei-Jyun
;
Lin, Justin Chun-Te
;
Huang, Chihpin
;
Lee, Duu-Jong
Coagulation is a commonly adopted process as a pretreatment step for minimizing membrane fouling. Three coagulants, polyaluminum chloride (PACl), alum, and FeCl3 were tested under four mixing-settling schemes for turbidity and natural organic matters (NOM) removal. The organic matters in the raw waters were fractionated by high performance size exclusion chromatography (HP-SEC) system and were characterized using the excitation-emission matrix (EEM) fluorescence spectra. Sufficient rapid mixing and slow mixing or applying two-stage coagulation benefit turbidity removal using PACl or FeCl3 under oelectrostatic patch coagulationo (EPC) mechanism. The EPC mechanism is not efficient for alum coagulation. At higher coagulant doses, the NOM removal is not affected by mixing condition. Intensive rapid mixing alone benefits NOM removal using PACl or FeCl3. Alum is a poor coagulant for NOM removal under EPC mechanism.
Transient Performance of MBR with Flux Enhancing Polymer Addition
(2010)
Zhang, Jin Song
;
Zhou, Ji Ti
;
Su, Yu-Chun
;
Fane, Anthony G.
;
環境工程研究所
The polymeric membrane performance enhancer (MPE50) was applied in two parallel submerged membrane bioreactors to test its effect on membrane fouling. Although the flux enhancer showed significant benefit, the effect of dosage termination caused a dramatic drop in performance relative to the control. The MBRs were compared in three carefully controlled runs performed over 155 days. The total organic carbon (TOC), EPS, and particle size data were collected at regular intervals during the entire operation. In run 1, after a start-up period of 62 days, a stable state was achieved in both MBRs. In run 2, a one-off 400mg/L MPE and 15mg/L MPE daily maintenance dosage were applied in one reactor for 60 days. The ocritical fluxo determined by the flux stepping test was increased by 50% from 20 LMH to 30 LMH after the addition of MPE. Long-term experiments were implemented at three separate levels of constant flux, namely 20, 30, and 40 LMH. At the flux of 20 LMH (below the ocritical fluxo of both reactors with and without MPE), the performance in both reactors was similar. At the flux of 30 LMH (above the ocritical fluxo of the MBR without MPE but below the ocritical fluxo of the MBR with MPE), the addition of MPE was found to mitigate membrane fouling. At a flux of 40 LMH (above the critical flux for both reactors), the TMP rise in the MBR with MPE was slower than the MBR without MPE, although the performance of both MBRs was poor. The performance differences correlated with the increase in the particle size distribution of the activated sludge as well as the low level of SMP and EPS (mainly polysaccharides) concentrations in the supernatant during steady state. In run 3, after terminating the MPE addition, the membrane performance was found to be significantly worse than the MBR without MPE, which suggests that the continuous maintenance dose of MPE is essential upon MPE application to the MBR.
高階助聽器晶片及系統---子計畫五：助聽器類比積體電路設計(I)
(2010)
吳介琮
;
WU JIEH-TSORNG
;
國立交通大學電子工程學系及電子研究所
本計畫是「高階助聽器晶片及系統」整合型計劃的一個子計畫。目的是設計及實現此系統所需要的低功率混合訊號式介面電路，並且將與其他數位電路整合於同一晶片上。本計劃將研發（1）類比數位轉換器；（2）數位Class-D喇叭驅動電路；（3）數位電源控制電路。本計畫是延續前一期計畫的研究成果，將發展新技術，改善以上電路的效能。在麥克風接收端，訊號的頻寬有20 kHz，而訊號的動態範圍（Dynamic Range）可高達100 dB。我們已經研發出新型的Delta-Sigma類比數位轉換器（ADC），配合數位校正技術，可以簡化運算放大器而降低功率消耗。我們將改良此ADC，增進其動態範圍並進一步降低功率消耗。我們會在前端加入可調整增益的放大器（Programmable-Gain Amplifier）來涵蓋麥克風的整個動態範圍。在喇叭端的驅動電路將會是整個助聽器系統最耗電的部份。我們已經設計了一個高性能的Class-D喇叭驅動電路。我們將嘗試降低Class-D驅動電路的失真度。我們也會針對另一個子計畫所開發的微機電喇叭，設計新的Class-D驅動電路。本計畫的電源控制電路是從電池擷取能源，並提供穩定的電壓給系統中其他的電路使用。我們提出數位式的電源控制電路，藉以實現複雜的控制機制來提升電路的效能。此電源控制電路需要一個低功率的ADC。我們會用SAR（Successive-Approximation-Register）的架構來實現此ADC。本計畫的所有電路最後將整合於 90 nm 的 CMOS 單晶片中。以 1 V 電池操作，類比電路的功率消耗不得超過 500 uW。
SOLVING 9 LAYER TRIANGULAR NIM
(2010-01-01)
Shan, Yi-Chang
;
Wu, I-Chen
;
Lin, Hung-Hsuan
;
Kao, Kuo-Yuan
;
資訊工程學系
Triangular Nim, one variant of the game Nim, is a common two-player game in Taiwan and China. In the past, Hsu strongly solved 7 layer Triangular Nim while some of the authors recently strongly solved 8 layer Triangular Nim. The latter required 8 gigabytes in memory and 8878 seconds. Using a retrograde method, this paper strongly solves 9 layer Triangular Nim. In our first version, the program requires four terabytes in memory and takes about 129.21 days aggregately. In our second version, improved by removing some rotated and mirrored positions, the program reduces the memory by a factor of 5.86 and the computation time by a factor of 4.38. Our experiment result also shows that the loss rate is only 5.0%. This is also used to help improve the performance.
應用泛用型最佳化演算架構於無線網路傳輸技術最佳化問題之研究
(2010)
陳穎平
;
CHEN YING-PING
;
國立交通大學資訊工程學系（所）
於現代無線網路傳輸技術高度發展的今日，無論是電信業者或電腦網路中整體應用系統所涵蓋之部分，包括多媒體編碼，網路傳輸協定，同儕式平台架構，服務品質控制等方面，皆有許多最佳化問題亟待解決與處理。而最佳化技術的本身，更是現實世界中非常重要的課題，各種研究、工程領域中相當多的困難與問題，最終都需要仰賴最佳化技術來進行處理。因此本兩年期計畫的目標，即奠基於本實驗室所發展的泛用型最佳化架構，將之應用於各種數值型態問題 (例如：整數型問題、實數型問題、混合型問題… 等)。並針對無線傳輸控制、網路服務品質機制中各項最佳化問題加以量身訂製，建立適應性函數的數學模型、處理與解決，以促進無線網路傳輸技術之發展與進步。在此研究中，亦將藉由實驗結果來調校泛用型最佳化工具之設定，使整體架構與效能表現更趨於穩定。計畫第一年以LT 編碼 (LT code) 的編碼密度的機率模型 (Degree distribution) 為最佳化的問題標的。在此問題中，藉由設定不同的最佳化參數型別與個數來觀察泛用型最佳化演算法之行為，並進行分析與研究，逐步地改進最佳化演算法之性能。在完成最佳化演算架構之調校後，本計畫第二年再以無線網路傳輸系統中其他三種最佳化問題為目標，進行最佳化實驗，最後將各項參數結果加以整合，並實作於無線網路平台，加強無線傳輸之性能。
異質網路環境之行動搜尋關鍵技術---子計畫一：車用隨意網路存取控制與連結機制之研究
(2010)
簡榮宏
;
JAN RONG-HONG
;
國立交通大學資訊工程學系（所）
隨著無線通訊網路技術的進步，加上電子元件價格漸漸下降以及行車安全問題越來越受重視，各國政府紛紛投入智慧型運輸系統(Intelligent Transport Systems, ITS)的研究。車用隨意網路(Vehicle Ad-hoc Network, VANET)，為當前了為實現ITS所發展出的重要網路架構。在個架構下，每一個搭載無線通訊設備的車輛，都可以透過路旁的路側系統(Road Side Unit, RSU) 連線到Server 端索取所需的資訊。而當車輛距離基地台太遠超出傳訊範圍時，也可透過其它的車輛幫忙轉送。換句話說，每一個車輛都可視為是一部行動無線路由器(mobile wireless router)。因此，這樣的架構可大幅提升網路建置彈性，只要有車輛的地方，即可是VANET的涵蓋範圍。子計畫一的主要研究目標在於發展VANET網路之存取控制協定(Media Access Control, MAC)及連結機制(Connectivity Support)。分為三個階段:在第一年的計畫中，先針對網路低層的MAC進行設計，我們將基於未來最有可能被廣泛使用的專用短距離通通訊(Dedicated Short Range Communication , DSRC)標準進行發展，以合乎趨勢的走向。接下來，在第二年的研究裡，我們將為高速移動的車輛設計以有效的叢集化及功率指定方法，以減少網路干擾，進而提升流量產出及管理上的效果。基於這些低層的技術及規劃方法後，最後一年，我們將發展上層的路由及配送方法，以可克服VANET網路因高度移動和短距離傳輸所造成間歇性連結特性及其衍伸的延遲問題，達到可靠傳輸的最終目標。總括而言，我們將在三年中階段逐步完成下列三大主題:
台灣學生網路相關著作權、學術寫作倫理課程之發展與評量研究---台灣學生網路相關著作權、學術寫作倫理課程之發展與評量研究
(2010)
周倩
;
CHOU CHIEN
;
國立交通大學教育研究所
台灣學生網路相關著作權、學術寫作倫理課程之發展與評量研究中文摘要本研究群擬提出三年期計畫，分為二個面向進行。第一個面向是超越著作權的範疇，針對學術寫作倫理—不抄襲、不剽竊，為各級學生—從小學高年級到大學—具體設計與發展有關網路著作權、學術寫作倫理的課程，並進行教學實驗，透過教育管道教導學生正確的網路相關著作權、學術寫作倫理、改寫與引用方式。課程的設計將築基於傳播學理論「慎思可能性模式」（Elaboration Likelihood Model, ELM），並採用「案例教學法」、「概念卡通」，以及「雙層次測驗」來進行。本研究之第二個重要面向，將特別針對學生網路著作權概念與英文寫作剽竊之觀念、態度、行為等面向，進行深度探討，藉以釐清學生英文寫作剽竊的行為（特別是文句抄襲的現象）與其對於著作權之觀念與行為間，是否有相互關聯性。另外，本計畫也試著把學生將網路資源成為寫作剽竊的「抄襲資源」，轉化為寫作的「學習資源」。透過網路引導學生如何找尋語言的參考資訊，並透過改寫（paraphrasing）過程，轉化為自己的文字，並進而增強學生的英文寫作能力。
薄膜熱傳導性質量測及其應用之研究
(2010)
謝宗雍
;
HSIEH TSUNG-EONG
;
國立交通大學材料科學與工程學系（所）
A chronology of Paik Nak‐chung
(Routledge, 2010)
Groundwater fluctuations in heterogeneous coastal leaky aquifer systems
(2010)
Chuang, M. -H.
;
Huang, C. -S.
;
Li, G. -H.
;
Yeh, H. -D.
;
環境工程研究所
In the past, the coastal leaky aquifer system, including two aquifers and an aquitard between them, was commonly assumed to be homogeneous and of infinite extent in the horizontal direction. The leaky aquifer system may however be heterogeneous and of finite extent due to variations in depositional and post depositional processes. In this paper, the leaky aquifer system is divided into several horizontal regions for the heterogeneous aquitard and underlying aquifer. A one-dimensional analytical model is developed for describing the head fluctuation in such a heterogeneous leaky aquifer system. The hydraulic head of the upper unconfined aquifer is assumed constant. It is found that both the length and location of the discontinuous aquitards presented in the coastal area have significant effects on the amplitude and phase shift of the head fluctuation in the lower aquifer. In addition, the influence of the formation heterogeneity on the spatial head distribution is also investigated.
Combining Reputation and Content-Based Filtering for Blog Article Recommendation in Social Bookmarking Websites
(2010)
Peng, Chi-Chieh
;
Liu, Duen-Ren
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
The new generation of web-based communities, Web2.0, represents an innovative spirit in sharing and managing contents. Social bookmarking is a portal for users to share, organize, search, and manage bookmarks of web resources. However, with the rapid growth of web documents that are produced every day, people are facing the problem of information overload. The Social bookmarking web site provides the push (user recommendation) counts of articles indicating the recommended popularity degrees of articles. In this paper, we propose to derive the popularity degree of an article by considering the reputation of users that push the article. Moreover, we propose a personalized blog article recommendation approach, which combines the reputation-based popularity with content based filtering, to recommend popular blog articles to users that satisfy their personal preferences. Our experimental results show that the proposed approach outperforms conventional approaches.
台灣科學社群40年風雲 : 記錄六、七〇年代理工知識份子與科學月刊
(交大出版社, 2010)
林照真
國立交通大學工業工程與管理學系陳文智教師升等送審著作論文集
(國立交通大學, 2010)
陳文智
新穎性變阻式記憶體(RRAM)製作及其電性機制研究
(2010)
施敏
;
SZE SIMON MIN
;
國立交通大學電子工程學系及電子研究所
近年來，隨著半導體元件微縮技術的演進，使得傳統的浮停閘極記憶體面臨了元件可靠度的挑戰，在奈米尺度下，等比例微縮後之穿隧氧化層厚度不再具有足夠的阻障效果，儲存於浮停閘內的電荷容易藉由穿隧效應回到矽基材內而失去元件的記憶能力。此外，在經過長時間且高速的電壓操作後，亦容易使過薄的氧化層產生漏電路徑，因而導致記憶體元件的失效。為了解決浮停閘極記憶體所遇到的困境，許多不同技術的非揮發性記憶元件相繼被提出;其中，變阻式記憶體元件(RRAM)是最具有發展潛力的技術之一。變阻式記憶體元件是利用簡單的金屬-絕緣體-金屬結構，在特定之絕緣體材料[如: 氧化鎳(NiO)、氧化銅(CuO)]等施加電壓或電流，使絕緣體發生轉態而改變其電阻值，因而可以在選定電壓下得到兩個不同的電阻值做為元件＂1＂和＂0＂的判讀，完全不同於浮停閘極記憶體元件的儲存機制。變阻式記憶體元件擁有較好的耐操度及資訊儲存能力，同時，也具有極低的操作電壓、極短的寫入抹除時間及高度的元件可微縮性，因此相當具有實用化的潛力。本計畫主要的目標為新穎性變阻式記憶體元件之製作與電性機制研究。在第一年，主要將提出具有潛力之變阻式記憶體結構，採用不同的薄膜沉積條件、電極、轉態層材料(如: 金屬氧化物、半導體氮/氧化物)以及元件結構等方式製作高效能的記憶體元件，並搭配完整之電性量測與材料分析，建立元件最佳製程條件及元件參數之資料庫，同時萃取相關的特性分析，完成變阻式記憶體元件製作。第二年，計畫除了著重於元件進一步的優化及改善，亦透過第一年之成果，嘗試提出變阻式記憶體在操作過程中的電性轉態模型，探討元件特性與薄膜材料間的相關性，建立完整的變阻式記憶體元件理論與其電性傳導機制。
形式語意學及漢語句子的語意分析
(2010)
林若望
;
LIN JO-WANG
;
國立交通大學外國語文學系
光電廢棄物資源化製備奈米吸附材料及其應用於CO2捕獲之研究
(2010)
白曛綾
;
BAI Hsunling
;
國立交通大學環境工程研究所
Effect of Thermal Treatments on HfO2/In0.7Ga0.3As Metal-Oxide-Semiconductor Capacitor Characteristics
(2010)
Chang, Chia-Hua
;
Shie, Tin-En
;
Lin, Yueh-Chin
;
Kakushima, K.
;
Iwai, H.
Post deposition annealing is a critical process for the quality improvement of gate oxides on III-V MOS capacitors. Though high temperature annealing would effectively repair defects, it could also induce undesired electrical characteristics due to the crystallization of the gate oxide. In this work, we investigate the novel two steps annealing technique to improve the HfO2/In0.7Ga0.3As MOSCAP properties. The two steps process takes advantage of 1st high temperature annealing (550 degrees C) to improve the interface quality and 2nd low temperature annealing (450 degrees C) for curing bulk oxide without oxide crystallization. The two steps annealing technique greatly improves the HfO2/In0.7Ga0.3As properties as compared to single step process and is expected to be helpful for future III-V MOSFET development.
客家的形成與變遷
(交大出版社, 2010)
莊英章