Browsing by Issue Date, starting with "2007-04-01"

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A formally fourth-order accurate compact scheme for 3D Poisson equation in cylindrical coordinates
(2007-04-01)
Lai, Ming-Chih
;
Tseng, Jui-Ming
;
應用數學系
;
Department of Applied Mathematics
In this paper, we extend our previous work (M.-C. Lai, A simple compact fourth-order Poisson solver on polar geometry, J. Comput. Phys. 182 (2002) 337-345) to 3D cases. More precisely, we present a spectral/finite difference scheme for Poisson equation in cylindrical coordinates. The scheme relies on the truncated Fourier series expansion, where the partial differential equations of Fourier coefficients are solved by a formally fourth-order accurate compact difference discretization. Here the formal fourth-order accuracy means that the scheme is exactly fourth-order accurate while the poles are excluded and is third-order accurate otherwise. Despite the degradation of one order of accuracy due to the presence of poles, the scheme handles the poles naturally; thus, no pole condition is needed. The resulting linear system is then solved by the Bi-CGSTAB method with the preconditioner arising, from the second-order discretization which shows the scalability with the problem size. (c) 2006 Elsevier B.V. All tights reserved.
The application of control chart for defects and defect clustering in IC manufacturing based on fuzzy theory
(2007-04-01)
Hsieh, Kun-Lin
;
Tong, Lee-Ing
;
Wang, Min-Chia
;
工業工程與管理學系
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Department of Industrial Engineering and Management
c-Chart was frequently used to monitor wafer defects during IC manufacturing. The clustering degree of defect on a wafer will increase along with the area of wafer gradually enlarging. The defect clustering causes the Poisson-based c-chart to exhibit many false alarms. Although several revised control charts have been developed to reduce the number of false alarms, those control charts still have some disadvantages in practical use. This study proposes a control chart that applies fuzzy theory and engineering experience to monitor wafer defects with the consideration of defect clustering. The proposed control chart is simpler and more rational than those revised c-charts. Finally, a case study of an IC company, owing to the HsinChu Scientific part at Taiwan, is used to demonstrate and verify the rationality and effectiveness. (C) 2006 Elsevier Ltd. All rights reserved.
Characterization of RF lateral-diffused metal-oxide-semiconductor field-effect transistors with different layout structures
(2007-04-01)
Hu, Hsin-Hui
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Chen, Kun-Ming
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Huang, Guo-Wei
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Chang, Chun-Yen
;
Lu, Yii-Chian
The DC and RF characteristics of lateral-diffused metal-oxide-semi conductor (LDMOS) transistors with different layout structures were studied. The devices were fabricated using a 0.5 mu m LDMOS process. The ring and fishbone structures, which are used widely in power devices, were designed and analyzed. We found that the. transconductance, on-resistance, cutoff frequency and maximum oscillation frequency were improved using the ring structure, due to a larger equivalent W/L and lower drain parasitic resistance. In addition, the self-heating effect of LDMOS transistors was also investigated by measuring the pulsed current-voltage (I-V) and pulsed RF characteristics. From the measured results, the ring structure appeared to be a better layout design for RF LDMOS transistors.
形成電子裝置閘極圖案之方法
(2007-04-01)
陳仕鴻
;
郭建億
;
張翼
一種形成電子裝置閘極圖案之方法,包括以下步驟:提供一基板,其上形成一第一光阻層;進行一第一道微影製程,以形成一具有一第一寬度之一第一圖案於該基板上;形成一第二光阻層,其覆蓋該基板上之該第一圖案以及該第一光阻層;以及進行一第二道微影製程,其與該第一道微影製程之間具有一位移,以形成一具有一第二寬度之一第二圖案於該基板上;其中,該第二寬度係小於該第一寬度。
用於製程中基板配對之方法
(2007-04-01)
巫木誠
;
張東華
;
王君豪
本發明揭露一種用於製程中基板配對之方法,基板配對(plate mapping)是將複數個第一卡匣(cassette)中之複數個第一基板(plate)與複數個第二卡匣中之複數個第二基板係進行配對,此方法可應用於組立製程(cell process)中,使第一基板與第二基板的配對集中於最少數量之第一卡匣與第二卡匣。此方法至少包含步驟如后,首先,藉由如製造執行系統(Manufacturing Execution System)的輔助工具,得到所有第一卡匣中之基板對應所有第二卡匣中之基板之良率,以建立一配對良率(mapping yield)表。接續,根據配對良率表,透過第一演算法(algorithm)係產生基板對應關係表,並據以產生初始卡匣對應關係表。又,提供第二演算法,根據基板對應關係表再配合配對良率表以檢驗基板對應關係表,並產生置換規則,且依據置換規則產生置換後之卡匣對應關係表。更,提供第三演算法,依據初始卡匣對應關係表及置換後卡匣對應關係表係計算卡匣對應値。最後,根據卡匣對應値,從所有置換規則中選取所需並產生集中化基板對應關係表及相應之集中化卡匣對應關係表。另外,提供一如排序機(sorter)之機台依據集中化基板對應關係表進行一抽換程序,將基板重新排序。
ISI-free block transceivers for unknown frequency selective channels
(2007-04-01)
Liu, Chih-Hao
;
Phoong, See-May
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Lin, Yuan-Pei
;
電控工程研究所
;
Institute of Electrical and Control Engineering
The orthogonal frequency-division multiplexing (OFDM) transceiver has enjoyed great success in many wideband communication systems. It has low complexity and robustness against channel-induced intersymbol interference (ISI). When the channel order does not exceed the length of cyclic prefix, any frequency-selective channel is converted to a set of frequency-nonselective subchannels. This channel-independent ISI-free property is useful for many applications. In this correspondence, we study general block transceiver with such a property. We will show that the solutions of channel-independent ISI-free block transceivers are given in a closed form. It is found that except for some special cases, the solutions are identical to the Lagrange-Vandermonde and Vandermonde-Lagrange transceivers.
Novel photo-dynamic caner therapy strategy development by nanodiamond-protein complex.
(2007-04-01)
Chen, Pei-Hsin
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Chiang, Ke-Yu
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Chang, Yu-Ching
;
Su, Chien-Ying
;
Chen, Kyh-Shin
Design of an FFT/IFFT processor for MIMO OFDM systems
(2007-04-01)
Lin, Yu-Wei
;
Lee, Chen-Yi
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電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, we present a novel 128/64 point fast Fourier transform (FFT)/ inverse FFT (IFFT) processor for the applications in a multiple-input multiple-output orthogonal frequency-division multiplexing based IEEE 802.11n wireless local area network baseband processor. The unfolding mixed-radix multipath delay feedback FFT architecture is proposed to efficiently deal with multiple data sequences. The proposed processor not only supports the operation of FFT/IFFT in 128 points and 64 points but can also provide different throughput rates for 1-4 simultaneous data sequences to meet IEEE 802.11n requirements. Furthermore, less hardware complexity is needed in our design compared with traditional four-parallel approach. The proposed FFT/IFFT processor is designed in a 0.13-mu m single-poly and eight-metal CMOS process. The core area is 660 x 2142 mu m(2), including an FFT/IFFT processor and a test module. At the operation clock rate of 40 MHz, our proposed processor can calculate 128-point FFT with four independent data sequences within 3.2 mu s meeting IEEE 802.11n standard requirements.
A Markovian engine for a biological energy transducer: The catalytic wheel
(2007-04-01)
Tsong, Tian Yow
;
Chang, Cheng-Hung
;
物理研究所
;
Institute of Physics
The molecular machines in biological cells are made of proteins, DNAs and other classes of molecules. The structures of these molecules are characteristically "soft", highly flexible, and yet their interactions with other molecules or ions are specific and selective. This chapter discusses a prevalent form, the catalytic wheel, or the energy transducer of cells, examines its mechanism of action, and extracts from it a set of simple but general rules for understanding the energetics of the biomolecular devices. These rules should also benefit design of manmade nanometer scale machines such as rotary motors or track-guided linear transporters. We will focus on an electric work that, by matching system dynamics and then enhancing the conformational fluctuation of one or several driver proteins, converts stochastic input of energy into rotation or locomotion of a receptor protein. The spatial (or barrier) and temporal symmetry breakings required for selected driver/receptor combinations are examined. This electric ratchet consists of a core engine that follows the Markovian dynamic, alleviates difficulties encountered in rigid mechanical model, and tailors to the soft-matter characteristics of the biomolecules. (c) 2006 Elsevier Ireland Ltd. All rights reserved.
消費者與組織採用不同學習策略之互動研究
(2007-04-01)
呂德財
;
陳重臣
;
廖國勛
;
Te-Tsai Lu
;
Jong-Chen Chen
近年來，企業面對全球化的市場競爭壓力與消費者的自主性與選擇機會增加的結果，促使企業必須因應外在環境的變化與消費者個人偏好進行學習與調適的活動，因此，企業如何針對消費者的需求進行組織學習乃是重要的研究課題之一。Stata(1989)指出組織學習的速率會明顯的影響其競爭優勢，而March(1991)更是建議組織必須採用不同寬狹目標的學習策略，以面對不同的競爭環境。本研究以不連續事件的模擬方法，建立一個組織與消費者之間動態的人工世界，目的是希望探討採用不同學習策略的組織，在面對不同特質的消費者時，其彼此之間的互動情形。本研究所採用的實驗設計是起源於Narver and Slater(1990)所主張的市場導向理論(Market Orientation Theory)，即組織必須向競爭者學習，並設計兩項實驗：第一是探討組織採用「快速」、「中速」、「緩慢」三種不同向競爭者學習的「學習速度」策略對其競爭力的影響；第二是探討組織採用「單一」、「略多」、「多」三種不同「學習對象」策略對其競爭力的影響。實驗結果顯示，組織採用學習策略可以提高其競爭力，但在學習的初期，組織採用「緩慢」學習策略，可以避免產生一窩蜂學習所產生的反效果。其次，在環境變動不大的環境中，組織採用「單一」學習目標，可以得到不錯的學習效果，然而，當環境變動相對較大時，組織應採用相對「較多」的學習目標較為適當。
The r-neighborhood graph: An adjustable structure for topology control in wireless ad hoc networks
(2007-04-01)
Jeng, Andy An-Kai
;
Jan, Rong-Hong
;
資訊工程學系
;
Department of Computer Science
In wireless ad hoc networks, constructing and maintaining a topology with lower node degrees is usually intended to mitigate excessive traffic load on wireless nodes. However, keeping lower node degrees often prevents nodes from choosing better routes that consume less energy. Therefore, the trade-off is between the node degree and the energy efficiency. In this paper, an adjustable structure, named the r-neighborhood graph, is proposed to control the topology. This structure has the flexibility to be adjusted between the two objectives through a parameter r, 0 <= r <= 1. More explicitly, for any set of n nodes, the maximum node degree and power stretch factor can be bounded from above by some decreasing and increasing functions of r, respectively. Specifically, the bounds can be constants in some ranges of r. Even more, the r-neighborhood graph is a general structure of both RNG and GG, two well-known structures in topology control. Compared with YGk, another famous adjustable structure, our method always results in a connected planar with symmetric edges. To construct this structure, we investigate a localized algorithm, named PLA, which consumes less transmitting power during construction and executes efficiently in O(n log n) time.
The study of recombinant fish growth hormone (rEaGH) folding and aggregation
(2007-04-01)
Zakowska, Izabela Lidia
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Chang, Chia-Ching
;
交大名義發表
;
National Chiao Tung University
Incorporating the electrode-tissue interface to cochlear implant models
(2007-04-01)
Lai, Wei-Dian
;
Choi, Charles T. M.
;
資訊工程學系
;
腦科學研究中心
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Department of Computer Science
The electrode is an important part of cochlear implant system because it affects the current spread and the response of the auditory nerves. In this paper, a new electrode-tissue interface model is coupled with a 3D cochlea and electrode model to simulate the condition of the electrodes in human cochlea is proposed. The effect of incorporating the electrode-tissue interface in a cochlea and the response of the auditory nerves is discussed. Three models are studied, a model of electrode without interface, a model of electrode incorporating the interface effect through an equivalent circuit, and a new model of electrode incorporating a thin layer between the electrode and the scala typmani. The three electrode models were studied using activating functions. Significant different results were found for electrodes with or without taking interface into account. The model results for the electrode model taking into account of the interface effect using an equivalent circuit and a thin interface layer are almost identical.
Chaos in a nonlinear damped Mathieu system, in a nano resonator system and in its fractional order systems
(2007-04-01)
Ge, Zheng-Ming
;
Yi, Chang-Xian
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機械工程學系
;
Department of Mechanical Engineering
In this paper, the chaotic behaviors of a nonlinear damped Mathieu system and of a nonlinear nano resonator system with integral orders and with fractional orders are studied. By applying numerical analyses such as phase portraits, Poincare maps and bifurcation diagrams, the periodic and chaotic motions are observed. It is found that chaos exists both in the nonlinear damped Mathieu system and in the integral order and fractional order nano resonator systems. (c) 2005 Elsevier Ltd. All rights reserved.
具有防止源汲極區摻雜離子在接面區外擴散的電晶體結構及其製作方法
(2007-04-01)
羅廣禮
;
楊宗
;
張翼
;
張俊彥
本發明係揭露一種具有防止源汲極區摻雜離子在接面區外擴散的電晶體結構及其製作方法,其係於半導體基底上形成材質為具有摻雜離子的含碳-矽化鍺(SiGe:C)嵌入式源汲極,利用碳能夠抑制摻雜離子擴散的特性,來形成兼具低接觸電阻與能抑制摻雜離子擴散的源汲極區,進而提高元件的可靠度。
Toxicity and detection of carboxylated nanodiamonds on human lung epithelial cells
(2007-04-01)
Chao, Jui-I
;
Liu, Kuang-Kai
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Cheng, Chia-Liang
;
Chang, Chia-Ching
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生物科技學系
賞鯨活動之旅遊服務品質區隔研究－問卷調查分析與類神經網路之應用
(2007-04-01)
林士彥
;
Shih-Yen Lin
;
Institute of Business and Management
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經營管理研究所
發展生態旅遊為政府東部觀光事業政策重點之一，台灣地理得天獨厚，周邊海域上的鯨豚發現紀錄種類豐富，自1997年起，遊客參與賞鯨活動及其相關配套行程為東海岸地區帶入可觀的觀光商機。在賞鯨活動日益發展之下，業者須針對服務內容不斷改善品質，提昇顧客滿意度，增強自身的競爭力，以期能永續經營。本研究以賞鯨活動為例，探討目前賞鯨活動之服務品質，並利用類神經網路分析比較賞鯨活動遊客服務品質型態的區隔，分析遊客的人口變數、旅遊特性對服務品質的差異。研究結果顯示採用類神經網路作分類判斷有較高的正確率，共區隔出「高度重視服務品質群」、「中度重視服務品質群」、「低度重視服務品質群」三個集群，做為賞鯨旅遊業者經營現有及開拓未來新業務時之市場區隔參考依據。
Resistive switching properties of SrZrO(3)-based memory films
(2007-04-01)
Lin, Chun-Chieh
;
Lin, Chao-Cheng
;
Tu, Bing-Chung
;
Yu, Jung-Sheng
;
Lin, Chen-Hsi
The resistive switching properties of the sputter-deposited SrZrO(3) (SZO) memory films were investigated in this study. The resistive switching behaviors of the SZO film can be improved by doping with vanadium oxide. The conduction mechanisms of the high and low current states of the 0.3% V-doped SZO (V:SZO) film are ohmic conduction and Frenkel-Poole emission, respectively, which implies the bulk effect of the memory film. The resistive ratio of two current states of the 0.3% V:SZO film remains 1000 times after applying 100 voltage sweeping cycles. Furthermore, the 0.3% V:SZO film shows stable resistive switching properties when measurement is performed at 100 degrees C. The band modulation of the SZO/LNO interface is proposed to explain the forming process of the SZO films. The 0.3% V:SZO memory film has excellent properties, such as high stability, good endurance, and long retention time, which make it a good candidate for next-generation nonvolatile memory application.
Increased organic light-emitting diode panel light efficiency by optimizing structure and improving alignment of pyramidal array light-enhancing layers
(2007-04-01)
Chen, Ming-Lung
;
Wei, An-Chi
;
Shieh, Han-Ping D.
;
光電工程學系
;
顯示科技研究所
A Pyramidal array light-enhancing layer (pyramidal ALEL) on ail organic light-emitting diode (OLED) panel has been optimized to enhance the luminance efficiency with a gain factor of 2.03 experimentally. The issues resulting from the misalignment of the ALEL and OLED pixels were investigated with respect to the effects of the pixel spacing and Moire pattern. The pixel spacing effect has been shown to be the main cause of gain loss during alignment, whereas the Moire pattern effect has been shown to be suppressed under the conditions of an appropriate rotational alignment and identical sizes for the ALEL and OLED pixels.
Saturated flow boiling heat transfer of refrigerant R-410A in a horizontal annular finned duct
(2007-04-01)
Hsieh, Y. Y.
;
Lie, Y. M.
;
Lin, T. F.
;
機械工程學系
;
Department of Mechanical Engineering
An experiment is conducted here to investigate the saturated flow boiling heat transfer characteristics of ozone friendly refrigerant R-410A in a horizontal annular finned duct. Meanwhile the associated bubble characteristics in the duct are also inspected from the flow visualization. The experimental data are presented in terms of saturated flow boiling curves, boiling heat transfer coefficients and flow photos. In addition, empirical correlation equations for the saturated flow boiling heat transfer coefficient and mean bubble departure diameter are proposed. The saturated flow boiling curves show that boiling hysteresis is insignificant in the flow and the wall superheat needed for the onset of nucleate boiling is slightly affected by the refrigerant mass flux. Besides, the boiling curves are mainly affected by the imposed heat flux and refrigerant mass flux. Moreover, the measured saturated flow boiling heat transfer coefficient increases with the imposed heat flux and refrigerant mass flux. Furthermore, at a higher refrigerant mass flux the departing bubbles are smaller. (c) 2006 Elsevier Ltd. All rights reserved.