Browsing by Issue Date, starting with "2005-12-18"

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Suppliers capability and price analysis chart
(2005-12-18)
Chen, KL
;
Chen, KS
;
Li, RK
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
To remain competitive in customer-oriented economics, the major parties in the supply chain should be integrated and managed effectively to respond to customer needs. Thus, the efficiency of the entire supply chain is a main concern, and is determined by the members of that supply chain. Partner selection thus becomes one of the key steps in supply chain construction. Given buyer-supplier information asymmetry, obtaining complete information from suppliers is difficult, since some supplier attributes cannot be definitely and quantitatively measured. This study establishes a suppliers capability and price analysis chart (SCPAC) focused on the case where the specification limits are symmetric about the target for evaluating supplier performance which applies the process incapability index C-pp introduced by Greenwich and Jahr-Schaffrath (International Journal of Quality & Reliability Management 12 (1995) 58) to measure supplier quality performance and the price index I-p is proposed here to display the difference between budget and component price. Practitioners can instantly and visually obtain information based on the locations of suppliers and price indices on SCPAC. SCPAC also provides clear directions for quality improvement, such as process accuracy and precision. SCPAC thus is an effective and efficient method for evaluating suppliers, which can simplify supplier evaluation, facilitate their effective visual selection, and provide insights into the process situation of suppliers who can become technological innovation partners. (c) 2004 Published by Elsevier B.V.
Polymer hot-carrier transistor
(2005-12-19)
Chao, YC
;
Yang, SL
;
Meng, HF
;
Horng, SF
;
物理研究所
Metal-base hot-carrier transistor with conjugated polymer emitter and collector is demonstrated. The device is fabricated by multiple spin coating with the metal base sandwiched between two polymers. A thin insulating layer of LiF is inserted between the emitter and base to enhance the hot carrier kinetic energy and reduce mutual dissolution. Using poly(9-vinylcarbazole) as the emitter, Al as the base, and poly(3-hexylthiophene) as the collector, common-emitter current gain of 25 is obtained with operation voltage as low as 5 V.
Highly efficient white organic electroluminescent devices based on tandem architecture
(2005-12-19)
Chang, CC
;
Chen, JF
;
Hwang, SW
;
Chen, CH
;
電子物理學系
Two types of tandem organic light-emitting diodes (OLEDs) with white-light emission have been developed by using Mg:Alq(3)/WO3 as the interconnecting layer. While the Commission Internationale d'Eclairage (CIE) coordinates of the tandem device with individual blue- and yellow-emitting OLEDs was sensitive to the viewing angle and the operating time, the tandem device connecting two white-emitting OLEDs was considerably less. At an optimal WO3 thickness of 5 nm, the tandem two-unit device produced three higher luminance efficiency than that expected of a single-unit device. A maximum efficiency of 22 cd/A was achieved by the tandem device comprised of two white-fluorescent OLEDs, and the projected half-life under the initial luminance of 100 cd/m(2) was over 80 000 h.
用於金屬編碼唯讀記憶體中消除耦合雜訊干擾之方法
(2005-12-21)
張孟凡
;
溫岸
本發明提出一種用於金屬編碼唯讀記憶體中消除耦合雜訊干擾之方法，此金屬編碼唯讀記憶體包括複數條字元線、複數條位元線、複數個預充電電晶體以及複數個緊固電晶體。當這些位元線其中之一被選取時，相鄰兩側之位元線藉由緊固電晶體而被緊固(clamping)至一固定之電壓值(VDD或是GND或是其他電壓)，這種緊固方法於這些鄰近位元線上不會產生壓降以及能同時於所選擇之位元線上除去耦合雜訊，進而除去高速金屬編碼唯讀記憶體中耦合雜訊所引起之讀碼失敗以及達到較高的速度。
The electrochemical polishing behavior of porous austenitic stainless steel (AISI 316L) in phosphoric-sulfuric mixed acids
(2005-12-21)
Chen, SC
;
Tu, GC
;
Huang, CA
;
材料科學與工程學系
;
Department of Materials Science and Engineering
The electrochemical polishing of porous austenitic stainless steel (PASS), AISI 316L, in the phosphoric-sulfuric mixed acid with volume-ratio of 1: 1, 2: 1 and 3: 1 at temperature ranging from 60 to 80 degrees C was studied. Electrochemical polishing of PASS was performed in the potential located in the limiting-current plateau of its anodic polarization curve using a rotating cylinder electrode (RCE). The results show that the electrochemical polishing of PASS is strongly affected by the volume ratio of the mixed acid and the polishing temperature, yet very little by the potentiostatic polishing charge. An optimal brightening and leveling surface of PASS could be achieved by polishing in 2: 1 v/v mixed acid at 70 degrees C. Whereas, polishing in 1 : 1 and 2: 1 v/v ratios at and above 75 degrees C would result in formation of enlarged pores on the PASS surface due to high dissolution rate within the pores. Pores with rounded edges in the surface morphology of PASS was shown when polishing in 3: 1 v/v mixed acid at temperature ranging from 60 to 80 degrees C. The effects of temperature, acid volume-ratio as well as potentiostatic polishing charge on polishing behavior were discussed based on the results of electrochemical test and the polished surface morphology using scanning electron microscope (SEM). (c) 2005 Elsevier B.V. All rights reserved.
動態影像估測之裝置及方法
(2005-12-21)
吳炳飛
;
瞿忠正
;
陳昭榮
;
彭信元
;
游東龍
本發明係有關於一種動態影像估測之裝置及方法，此裝置具有複數個二維差值累積器、複數個位移暫存器、比較器、及加法器，二維差值累積器係用以執行變動影像及先前影像之比較，並輸出複數個對應之絕對差總和，再由比較器對此些絕對差總和進行比較，以取得一個最小之絕對差總和，因而得知變動影像與先前影像之運動向量，並記錄之。如此一來，影像資料僅需儲存變動影像及其運動向量，而非整幅之目前影像，故能減少影像資料之資料量。
Relaxation dynamics of 2,7-and 3,6-distyrylcarbazoles in solutions and in solid films: Mechanism for efficient nonradiative deactivation in the 3,6-linked carbazole
(2005-12-22)
Wang, TT
;
Chung, SM
;
Wu, FI
;
Shu, CF
;
Diau, EWG
We performed time-resolved spectral investigations of two distyrylcarbazole derivatives, 2,7- and 3,6-distyrylcarbazole (2,7-DPVTCz and 3,6-DPVTCz, respectively), in dilute toluene solution and in solid films mixed with poly(methyl methacrylate) (PMMA). The lifetime of 2,7-DPVTCz in its excited state in solution is similar to 100 times as great as that of 3,6-DPVTCz, consistent with their photophysical nature. The former shows intense emission, but the latter is nearly nonfluorescent in a free environment. Moreover, the lifetime of 3,6-DPVTCz in its excited state increased also similar to 100 times when the molecule was encapsulated in a 3,6-DPVTCz/PMMA solid film, indicating that intramolecular motion of the molecule significantly affects the observed relaxation dynamics in a confined environment. Calculations on the excited states indicate that ail efficient intersystern crossing is activated upon twisting of the bridged C-C single bond in a free 3,6-linked carbazole; such efficient deactivation is impractical in 2,7-linked carbazole or for 3,6-linked carbazole in a PMMA matrix. Information obtained from experiments on femtosecond fluorescence enables LIS to distinguish crucial relaxation processes in the excited state for a profound understanding of the details of vibrational and electronic relaxations of 3,6-DPVTCz in Solution.
WASTEWATER TREATMENT EQUIPMENT
(2005-12-22)
Huang, Chihpin
;
Den, Walter
A wastewater treatment equipment comprising a reaction tank, a plurality of anodic plates, a plurality of cathodic plates, a power supply and a collection device is provided. The reaction tank comprises an inlet and an outlet. The anodic plates and the cathodic plates are placed in a staggered order in the reaction tank. The power supply is electrically connected to the anodic plates and the cathodic plates. The collection device is disposed at the bottom of the reaction tank so the colloidal particles deposited at he bottom of the reaction tank can be removed.
A numerical study on the evolution and structure of a stress-driven free-surface turbulent shear flow
(2005-12-25)
Tsai, WT
;
Chen, SM
;
Moeng, CH
;
土木工程學系
;
Department of Civil Engineering
Turbulent shear flow beneath a flat free surface driven by a surface stress is simulated IF numerically to gain a better understanding of the hydrodynamic processes governing the scalar transfer across the air-water interface. The simulation is posed to mimic the subsequent development of a wind-driven shear layer as in a previous experiment except that the initiation of the surface waves is inhibited, thus focusing on the boundary effect of the stress-imposed surface on the underlying turbulent flow and vice versa. Despite the idealizations inherent in conducting the simulation, the computed flow exhibits the major surface features, qualitatively similar to those that appear in the laboratory and field experiments. Two distinct surface signatures, namely elongated high-speed streaks and localized low-speed spots, are observed in the simulated flow. Including temperature as a passive tracer and describing an upward heat flux at the surface, we obtain high-speed streaks that are colder and low-speed spots that are warmer than the surrounding regions. The high-speed streaks, arranged with somewhat equal cross-spacing of centimetres scale, are formed by an array of streamwise jets within the viscous sublayer immediately next to the surface. Beneath the streaks, counter-rotating streamwise vortex pairs are observed among other prevailing elongated vortices. However, they are significantly shorter in length and more irregular than their corresponding high-speed streaks at the surface. Accompanying the more organized high-speed streaks, localized regions of low streamwise velocity emerge randomly on the surface. These low-speed spots are attributed to strong upwelling flows which disrupt the viscous sublayer and also bring up the submerged fluids of low streamwise velocity. The occasional interruptions of the streamwise high-speed Jets by the upwelling flows account for bifurcation or dislocation of the surface streaks. Statistics of the turbulence are presented and their implications for the formation of the flow structures are discussed.
Ab initio characterization of electron transfer coupling in photoinduced systems: Generalized Mulliken-Hush with configuration-interaction singles
(2005-12-29)
Chen, HC
;
Hsu, CP
;
應用化學系分子科學碩博班
;
Institute of Molecular science
To calculate electronic couplings for photoinduced electron transfer (ET) reactions, we propose and test the use of ab initio quantum chemistry calculation for excited states with the generalized Mulliken-Hush (GMH) method. Configuration-interaction singles (CIS) is proposed to model the locally excited (LE) and charge-transfer (CT) states. When the CT state couples with other high lying LE states, affecting coupling values, the image charge approximation (ICA), as a simple solvent model, can lower the energy of the CT state and decouple the undesired high-lying local excitations. We found that coupling strength is weakly dependent on many details of the solvent model, indicating the validity of the Condon approximation. Therefore, a trustworthy value can be obtained via this CIS-GMH scheme, with ICA used as a tool to improve and monitor the quality of the results. Systems we tested included a series of rigid, sigma-linked donor-bridge-acceptor compounds where "through-bond" coupling has been previously investigated, and a pair of molecules where "through-space" coupling was experimentally demonstrated. The calculated results agree well with experimentally inferred values in the coupling magnitudes (for both systems studied) and in the exponential distance dependence (for the through-bond series). Our results indicate that this new scheme can properly account for ET coupling arising from both through-bond and through-space mechanisms.
Fast fourier transform processor, dynamic scaling method and fast Fourier transform with radix-8 algorithm
(2005-12-29)
Lee, Chen-Yi
;
Lin, Yu-Wei
The present invention provides a fast Fourier transform processor, dynamic scaling method and fast Fourier transform with radix-8 algorithm. It reduces quantization errors generated from the operation by using a matrix prefetch buffer-based fast Fourier transform processor. Operation sizes of the matrix prefetch buffer as block sizes the invention adjust the signals against overflow by the status of signals in each block. It can shunt time of complex multiplication operation systematically and reduce operation complexity in butterfly units by utilizing algorithms of 3-step radix-8 fast Fourier transform and re-scheduling. Moreover, the present invention provides a fast Fourier transform processor for realizing the methods and algorithms mentioned above.
Multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications
(2005-12-29)
Huang, Ching Yao
;
Tsai, Ming Yuan
;
Huang, Joe
A multi-slope handoff algorithm for controlling dynamic communication quality in wireless communications is proposed to let a mobile node adjust the handoff slope according to different communication connection situations for setting the optimum add/drop connection trigger thresholds. The algorithm comprises the following steps. First, a mobile node receives pilot strengths of its service pilot and nearby pilots to produce an aggregate strength. Next, the mobile node determines whether to perform handoff according to the magnitude of the aggregate strength. The handoff action is then controlled by multi-slope handoff operations to set an appropriate slope and to calculate the add/drop connection trigger thresholds when performing handoff. Finally, the pilot to be connected is selected based on the communication quality at that time. In this way, the quality of the communication service can be enhanced, the connection power consumption can be lowered, and the communication channel usage can be reduced.
A method for calibrating a motorized object rig
(2006)
Huang, PH
;
Tsai, YP
;
Lo, WY
;
Shih, SW
;
Chen, CS
Object Movies (OMs) have been successfully used in many applications. However, the techniques for acquiring OMs still need to be improved if high-quality and efficient OMs are desired. In this paper, we present a method for calibrating a motorized object rig to facilitate the acquisition of OMs. We first apply the CPC kinematic model to formulate the 3D configuration of the device, and then propose a method to estimate the parameters of the CPC model of the device. Furthermore, a visual tool is provided for users to adjust the controllable axes of the rig according to the estimated results. After this calibration, more accurate camera parameters can be obtained and then be used for different purposes. In this work, we use the parameters to reconstruct, from an OM, the 3D model of the object, and then adjust the OM according to the center of the 3D model so that a high-quality OM can be obtained for rendering.
科學概念的建構與重建數位學習研究---總計畫(III)
(2006)
佘曉清
;
SHE HSIAO-CHING
;
國立交通大學教育研究所
漁港水域之生態模式基礎研究
(2006)
郭一羽
;
KUO YI-YU
;
交通大學土木工程系
漁港水域之水質改善，對改善漁港的景觀生態環境而言是最重要的課題。水質與水中的浮游生物息息相關，而因一般的水質改善目標或評估標準難以確立，故利用生物來判斷水質是合理的作法。本研究擬利用現地水質與浮游生物的調查資料與數值計算模式，探討水質與浮游生物的相關性。研究目標擬建立港內水質數值模式、浮游生物之棲地模式，以及以浮游生物為主之生物指標或指標生物。研究成果期望對營造具生態性之親水環境的港池水域有所助益。
自身排列高分子薄膜太陽能電池之開發(II)
(2006)
陳方中
;
Chen Fang-Chung
;
交通大學光電工程研究所
口語、文字、祖先故事：貴州東部苗人的古歌與家譜比較研究
(2006)
簡美玲
;
Mei-Ling Chien
;
國立交通大學人文社會學系
本二年期研究計劃在面對口語及文字並存的當代貴州苗人社群，及其所創造的兩套歷史論述之間的對照及分離。本研究假設兩套對祖先及系譜想像有所區別的歷史論述，不僅再現苗社群對人觀、空間、時間(歷史)及中國國家的兩種不同想像，並也突顯口語及文字相互對照、分離的張力，以及由此而生的兩套在地的文明化經驗。研究對像為貴州東部清水江畔的苗人社群，及其以口語及文字而敘述祖先形象及祖先遷移、墾拓經歷的兩種文類：一為漢字書寫、印刷出版的家譜，一為由地方歌師傳唱及記音的苗族大歌(或古歌)。就區域研究及理論議題而言，這個比較研究仍在面對原本無文字的西南邊陲社會，對中國國家長期文字化及文明化(儒家)的在地回應。為探討文字化在西南中國苗人社區所展現的在地性，以及口語、文字的對照及分離，與苗人對祖先及國家的想像，本研究主旨有二：(1)通過文本的比較分析，討論口語及文字之祖先故事的結構差異，以及對時、空、人、國家的差異想像。(2) 比較及討論村寨苗人的性別、年齡、教育，與對兩套祖先故事之主觀觀點的對比及差異。本計畫第一年在釐清口語系統下苗族古歌的敘述結構，以及苗人藉由哪些詩歌語言的元素、意象的組合，傳達對祖先及遷徙時、空的想像。
分權式逆向供應鏈價格流量合約設計之研究
(2006)
洪一薰
;
Hong I-Hsuan Ethan
;
國立交通大學工業工程與管理學系(所)
分權式逆向供應鏈（Decentralized reverse supply chains），是由一群獨立運作的個體所組成，個體在系統中代表不同的功能，如回收商（Collectors）、集中商（Consolidation sites）或處理商（Processors），而個體中通常也互相競爭。多數逆向供應鏈之文獻以中央集權式（Centralized）的基本架構來規劃相關決策，在Centralized 系統中，系統規劃者知悉個體的資訊並訂定個體之決策變數使得系統表現最佳化。然而，逆向供應鏈系統經常是由一群各自獨立運作的個體所組成，每個獨立的個體在決策時有各自的考量，個體的決策變數（流量及收購價格）會影響到其它個體的表現，其它個體的決策也會影響到各自的表現，且個體也不願意將自己的資訊提供給其它個體或向大眾揭露。此種型態之系統，稱之為分權式（Decentralized）系統。本研究擬考慮一多階分權式逆向供應鏈系統，假設該系統由上游邊界層、中間階層及下游邊界層所組成。每個階層由一群獨立運作的個體所組成，上游個體經由制定價格 -流量合約關係與其下游個體所溝通，而下游個體訂定物料之收購價格，本研究擬以穩健性最佳化（Robust optimization）及貝氏決策分析（Bayesian decision-making）訂定此一合約關係，藉以描述下游個體收購價格之不確定性。
45-nm CMOS 80~120GHz 射頻前端電路前瞻研究與設計
(2006)
吳重雨
;
CHUNG-YUWU
;
交通大學電子工程系
中小學資訊素養之概念診斷、課程設計與評量研究(II)
(2006)
周倩
;
CHOU CHIEN
;
國立交通大學教育研究所