Browsing by Issue Date, starting with "2015-03"

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A 16-mW 8-Bit 1-GS/s Digital-Subranging ADC in 55-nm CMOS
(2015-03-01)
Chung, Yung-Hui
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Wu, Jieh-Tsorng
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電機工程學系
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Department of Electrical and Computer Engineering
This paper presents a digital-subranging (sub-R) analog-to-digital conversion (ADC) architecture to improve the operation speed of sub-R ADCs. Long latency between coarse and fine conversions will slow down the conventional sub-R ADCs. The proposed digital-sub-R uses digital circuits to implement the sub-R function and shorten this latency, thus benefits the CMOS scaling. Furthermore, the dynamic comparators are used to save more ADC power consumption. Their accuracy is improved by the proposed pseudodifferential offset calibration loop. The digital-sub-R also helps to reduce the dynamic offset of the fine comparators caused by the input common-mode variation. Fabricated using a 55-nm CMOS technology, the reported 8-bit 1-GS/s ADC consumes only 16 mW from a 1.2 V supply. Measured signal-to-noise ratio (SNR) and spurious free dynamic range (SFDR) are 46 and 55 dB, respectively. Measured effective number of bits (ENOB) is seven bits at 10-MHz input frequency. At Nyquist input, the ENOB performance of 6.3 bits is still maintained. Its figure-of-merit is 197-fJ/conversion-step.
Job-Level Alpha-Beta Search
(2015-03-01)
Chen, Jr-Chang
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Wu, I-Chen
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Tseng, Wen-Jie
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Lin, Bo-Han
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Chang, Chia-Hui
An approach called generic job-level (JL) search was proposed to solve computer game applications by dispatching jobs to remote workers for parallel processing. This paper applies JL search to alpha-beta search, and proposes a JL alpha-beta search (JL-ABS) algorithm based on a best-first search version of MTD(f). The JL-ABS algorithm is demonstrated by using it in an opening book analysis for Chinese chess. The experimental results demonstrated that JL-ABS reached a speed-up of 10.69 when using 16 workers in the JL system.
A 10-Gb/s, 1.24 pJ/bit, Burst-Mode Clock and Data Recovery With Jitter Suppression
(2015-03-01)
Su, Ming-Chiuan
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Chen, Wei-Zen
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Wu, Pei-Si
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Chen, Yu-Hsiang
;
Lee, Chao-Cheng
A burst mode clock and data recovery (BMCDR) circuit for 10 Gbps passive optical network (10G-PON) is presented. The proposed BMCDR is reconfigurable between data gating mode and phase tracking mode to achieve instantaneously phase-locked with jitter suppression capability. Incorporating selectively gating VCO (SGVCO), the BMCDR operates at 1/5-rate and accomplishes 1:5 demultiplexing with a high energy efficiency of 1.24 pJ/bit. With a 4 MHz, 0.22UI(pp) jitter stressed input data at 10 Gbps, the recovered clock jitter at 2 GHz is 2.94 ps(rms). The prototype is fabricated using 55 nm CMOS technology. The core area is 0.03 mm(2) only. It dissipates 12.4 mW from 1 V supply.
溼度感測器
(2015-03-01)
賴義澤
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張錫嘉
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李鎭宜
一種溼度感測器，包含接地電極、第一電極、第二電極、感濕層、計算模組及查表模組，其中接地電極耦接於接地端。第一電極相對於接地電極的第一端。第二電極相對於接地電極的第二端。感濕層至少填充於第一電極與第一端之間及第二電極與第二端之間。第一電極與接地電極的第一端之間具有第一電容值，第二電極與接地電極的第二端之間具有第二電容值。感濕層依據空氣溼度改變第一電容值與第二電容值。計算模組接收第一電容值及第二電容值，並計算第一電容值及第二電容值的差值。查表模組再依據差值，查找與差值對應的溼度值。
運動之後的思想：回應柄谷行人關於「超越民主」的問題－從《哲學的起源》出發
(國立陽明交通大學出版社, 2015-03-01)
劉紀蕙
單端靜態隨機存取記憶體
(2015-03-01)
周世傑
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林志宇
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莊景德
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杜明賢
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邱奕瑋
一種單端靜態隨機存取記憶體，包括至少一記憶胞以及第三開關。記憶胞包括資料拴鎖單元、第一開關、第二開關以及資料傳輸單元。資料拴鎖單元拴鎖所接收的輸入資料，並提供儲存資料及此儲存資料的反向資料。第一開關依據第一字元線信號使參考資料傳送至資料拴鎖單元。第二開關依據第二字元線信號使參考資料傳送至資料拴鎖單元。資料傳輸單元依據儲存資料以及控制信號以決定是否傳送參考資料至位元線。第三開關接收參考資料以及控制信號，依據控制信號以傳送參考資料至第一及第二開關以及資料傳輸單元。
Alex Around the World to Taiwan
(國立陽明大學, 2015-03)
Alexander Waits
NETWORK TESTING
(2015-03-01)
Lin, Ying-Dar
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Johnson, Erica
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交大名義發表
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National Chiao Tung University
A sampling and classification item selection approach with content balancing
(2015-03-01)
Chen, Pei-Hua
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交大名義發表
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National Chiao Tung University
Existing automated test assembly methods typically employ constrained combinatorial optimization. Constructing forms sequentially based on an optimization approach usually results in unparallel forms and requires heuristic modifications. Methods based on a random search approach have the major advantage of producing parallel forms sequentially without further adjustment. This study incorporated a flexible content-balancing element into the statistical perspective item selection method of the cell-only method (Chen et al. in Educational and Psychological Measurement, 72(6), 933-953, 2012). The new method was compared with a sequential interitem distance weighted deviation model (IID WDM) (Swanson & Stocking in Applied Psychological Measurement, 17(2), 151-166, 1993), a simultaneous IID WDM, and a big-shadow-test mixed integer programming (BST MIP) method to construct multiple parallel forms based on matching a reference form item-by-item. The results showed that the cell-only method with content balancing and the sequential and simultaneous versions of IID WDM yielded results comparable to those obtained using the BST MIP method. The cell-only method with content balancing is computationally less intensive than the sequential and simultaneous versions of IID WDM.
Automatic-Patterned Sapphire Substrate Nanometrology Using Atomic Force Microscope
(2015-03-01)
Hung, Shao-Kang
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Cheng, Chiao-Hua
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Chen, Cheng-Lung
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機械工程學系
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Department of Mechanical Engineering
Light emitting diodes become brighter because of the contribution of patterned sapphire substrates (PSS). The dimensions of PSS crucially affect its performance. The most suitable instrument to measure PSS is atomic force microscope, which provides three-dimensional surface profiles. This paper proposes an automatic method to analyze AFM-collected raw data and produce characteristic parameters of PSS, including height, diameters, pitch, and side angles. Experimental results show that this method has good repeatability of 1.2 and 6.3 nm on measuring height and bottom diameter, respectively. This nanometrology method will be extensively applicable for similar nanostructures with periodic patterns.
Layered MoS2 grown on c-sapphire by pulsed laser deposition
(2015-03-01)
Ho, Yen-Teng
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Ma, Chun-Hao
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Luong, Tien-Tung
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Wei, Lin-Lung
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Yen, Tzu-Chun
Layered growth of molybdenum disulphide (MoS2) was successfully achieved by pulsed laser deposition (PLD) method on c-plane sapphire substrate. Growth of monolayer to a few monolayer MoS2, dependent on the pulsed number of excimer laser in PLD is demonstrated, indicating the promising controllability of layer growth. Among the samples with various pulse number deposition, the frequency difference (A1gE12g) in Raman analysis of the 70 pulse sample is estimated as 20.11 cm(1), suggesting a monolayer MoS2 was obtained. Two-dimensional (2D) layer growth of MoS2 is confirmed by the streaky reflection high energy electron diffraction (RHEED) patterns during growth and the cross-sectional view of transmission electron microscopy (TEM). The in-plane relationship, (0006) sapphire//(0002) MoS2 and inline image sapphire//inline imageMoS(2) is determined. The results imply that PLD is suitable for layered MoS2 growth. Additionally, the oxide states of Mo 3d core level spectra of PLD grown MoS2, analysed by X-ray photoelectron spectroscopy (XPS), can be effectively reduced by adopting a post sulfurization process. (C) 2015 WILEY-VCH Verlag GmbH &Co. KGaA, Weinheim
Pattern-Based Near-Duplicate Video Retrieval and Localization on Web-Scale Videos
(2015-03-01)
Chou, Chien-Li
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Chen, Hua-Tsung
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Lee, Suh-Yin
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資訊工程學系
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Department of Computer Science
With the exponential growth of web multimedia contents, the Internet is rife with near-duplicate videos, the video copies applied with visual/temporal transformations and/or post productions. Two critical issues, copyright infringement and search result redundancy, arise accordingly. To resolve these problems, this paper proposes a spatiotemporal pattern-based approach under the hierarchical filter-and-refine framework for efficient and effective near-duplicate video retrieval and localization. Firstly, non-near-duplicate videos are fast filtered out through a computationally efficient data structure, termed pattern-based index tree (PI-tree). Then, an m-pattern-based dynamic programming (mPDP) algorithm is designed to localize near-duplicate segments and to re-rank the videos retrieved. The influence of time shift misalignment can be alleviated by time-shift m-pattern similarity (TPS) measurement. Comprehensive experiments on the five datasets are conducted to verify the effectiveness, efficiency, robustness, and scalability of the proposed approach. Convincing results demonstrate that our proposed approach outperforms the state-of-the-art approaches in terms of mean average precision (MAP) and normalized detection cost rate (NDCR) on the testing datasets. Furthermore, the proposed approach can achieve high quality of near-duplicate video localization in terms of quality frames (QF) and mean F1.
台積電志工社社長張淑芬女士演講：終身學習
(國立陽明大學, 2015-03)
秘書室
The assessment of high recharge areas using DO indicators and recharge potential analysis: a case study of Taiwan\'s Pingtung plain
(2015-03-01)
Tsai, Jui-Pin
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Chen, Yu-Wen
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Chang, Liang-Cheng
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Chen, Wen-Fu
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Chiang, Chung-Jung
Identifying high groundwater recharge areas is important for the conservation of groundwater quality and quantity. A common practice used by previous studies is to estimate groundwater recharge potential (GRP) using recharge potential analysis (RPA) under different environments. These studies use the estimated GRP to identify the high potential groundwater recharge sites. However, the RPA parameters are subjectively defined for these previous studies. To remove the supposition, this study proposes a systematic approach that defines the RPA parameter values based on the theory of parameter identification. This study uses dissolved oxygen (DO) indicators to calibrate the RPA parameters. This calibration improves the correlation coefficient between the DO indicators and computed GRP values from 0.63 to 0.87. By comparing the initial values, these results indicate that the estimated RPA parameters better represent the field infiltration characteristic. This result also indicates that defining the RPA parameter values based on DO indicators is necessary and important for accuracy. These calibrated parameters are used to estimate the GRP distribution of Taiwan\'s Pingtung Plain. The GRP values are delineated into five levels. High and excellent GRP areas are defined as high recharge areas, which compose about 26.74 % of the study area. Based on the proposed method, the estimated GRP distribution can accurately represent the study area\'s field recharge characteristics. These study results can be a good reference for groundwater recharge analyses, specifically if well data is limited or difficult to obtain.
Reducing Multi-hop Wireless Delay for High-Priority Applications in Vehicular Wireless Networks
(2015-03-01)
Wang, Kuo-Lung
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Wang, Tsan-Pin
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Tseng, Chien-Chao
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資訊工程學系
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Department of Computer Science
Vehicular wireless networks (VWNs) offer both high-priority safety and low-priority non-safety applications. In VWNs, the high-priority applications are urgent. Transmitting urgent information demands low delay and high bandwidth. When the traffic is heavy, how to reduce the multi-hop wireless delay will be critical for urgent information. In this paper, we propose a blocking strategy to preempt the transmission of low-priority vehicles and to decrease the number of contending vehicles. Thus, the multi-hop wireless delay of high-priority vehicles will be greatly reduced even if the traffic is heavy. Moreover, we also propose a mathematical model to evaluate the performance of the proposed strategy and compare the existing strategy. Performance results show that the proposed strategy can reduce the multi-hop wireless delay significantly.
Time-Shift Current Balance Technique in Four-Phase Voltage Regulator Module with 90% Efficiency for Cloud Computing
(2015-03-01)
Su, Yi-Ping
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Chen, Wei-Chung
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Huang, Yu-Ping
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Chen, Chun-Yen
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Ni, Chia-Lung
Four power stages for voltage regulator module (VRM) are adopted to provide high current driving capability and low output ripple in cloud computing. Thus, the time-shift current balance (TSCB) technique is proposed to achieve high performance power supply for servers. In addition, the power request, which includes the number of active phases and voltage identification, is acknowledged by servers for high driving capability during high throughput and high efficiency during standby mode. Furthermore, to equally distribute the current in each phase, the proposed TSCB technique in either voltage-mode or peak current-mode control improves the current balance performance and solves the stability problem. In the scale-down clouding computing prototype, the efficiency can be kept higher than 90% over a wide load current range of 2 A. In addition, the performance and operating frequency of the servers in stable operation are not limited by the VRM with the TSCB technique.
Effect of pressure on the moisture adsorption of silica gel and zeolite 13X adsorbents
(2015-03-01)
Lee, Yan-Ching
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Weng, Ling-Chia
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Tseng, Pen-Chang
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Wang, Chi-Chuan
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機械工程學系
The effect of pressure on the adsorption characteristics of spherical adsorbents of zeolite 13X and RD silica gel is numerically analyzed in this study. The numerical model considers simultaneous heat and mass transfer in a spherical desiccant particle, which accounts for diffusion of moisture into the particles by both Knudsen and surface diffusion. The calculations indicate a dramatic difference of the adsorption behaviors between silica gel and zeolite 13X at a higher pressure of 7.5 atm due to the capability of adsorption and the diffusive ability of adsorbate within the adsorbent. For a lower system pressure of 1 atm, the variation amid silica gel and zeolite 13X is opposite to that at P = 7.5 atm. This is because the amount of the adsorbate for silica gel at P = 1 atm is significantly reduced. At a higher system pressure of 7.5 atm, the initial water content casts a very small influence on the adsorption behaviors for silica gel. However, for a normal pressure of 1 atm, a detectable difference is encountered subject to initial water contents. On the other hand, the initial water content casts appreciable influence on the adsorption characteristics for zeolite 13X.
New thienofluoroanthenes as building blocks for optoelectronic applications
(2015-03-01)
Keshtov, M. L.
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Godovsky, D. Yu.
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Kuklin, S. A.
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Zou, Y.
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Chen, F. Ch.
普拉娣巴‧帕碼的反身策略：《真實之美：探索愛麗絲沃克》評論
(國立陽明交通大學出版社, 2015-03-01)
王遠洋
普拉娣巴‧帕碼（Pratibha Parmar）的紀錄片中屢見非裔美國女作家愛麗絲‧沃克（Alice Walker）的身影，其箇中原因除了兩人共有的族裔背景之外，最主要的原因是她們在書寫和影像敘事中都呈現出反身性（self-reflexivity）的策略。沃克的《紫色姐妹花》（The Color Purple）從1982年問世，到1985年由史蒂芬‧史匹柏（Steven Spielberg）所改編的電影搬上大銀幕映演，其中所呈現的亂倫、強暴、同性戀等暴力議題引發了相當大的社會爭議，尤其是來自黑人內部社群的不滿。沃克選擇忠實呈現這些暴力行為，卻反而遭受黑人同胞的攻訐，原因在於黑人認為她的書寫和後來史匹柏的改編電影中的暴力再現並不符合事實，且有損黑人的名譽。沃克之所以描寫這些黑人自相殘害的過程，將其公諸於世，恰與帕碼針對黑人女性主義與運動所提出的批判性自我審視（critical self-evaluation）不謀而合。本文同時評論帕碼的紀錄片作品與梳理其學術論述，指出非裔美國人的自我認同絕非僅是抵抗外部壓迫的單向運動，更是揭露並面對內在矛盾的自我批判。否則一來，種族主義可能使黑人片面地將自身問題歸咎於白人，膚色淪為逃避現實的擋箭牌；二來，那些無法被統合為共同體的族群也將持續被邊緣化。
Toward successful commercialization of university technology: Performance drivers of university technology transfer in Taiwan
(2015-03-01)
Hsu, David W. L.
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Shen, Yung-Chi
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Yuan, Benjamin J. C.
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Chou, Chiyan James
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科技管理研究所
The transfer of university technology(2)to industry involves a multitude of mechanisms which can be broken down into an even larger number of activities. These mechanisms and activities include launching technology-oriented start-ups, and providing the following: collaborative research, contract research, consulting services, technology licensing, graduate education, advanced training for enterprise staff, exchange of research staff, and other forms of formal or informal information transfer. Taking Taiwan\'s universities as a research base, this study intends to identify the critical drivers affecting the performance of university technology transfer. The Fuzzy Delphi method, interpretive structural modeling (ISM), and the analytic network process (ANP) are employed sequentially to derive the relative importance of the various performance drivers. Human capital and institutional/cultural resources are the two most emphasized resources for the improvement of university technology transfer in Taiwan. Some policy implications are derived on the basis of these results. (C) 2014 Elsevier Inc. All rights reserved.