Browsing by Issue Date, starting with "2013-12-30"

Now showing 1 - 20 of 29659

Frequency measurement of the 6P(3/2) -> 7S(1/2) transition of thallium
(2013-12-30)
Shie, Nang-Chian
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Chang, Chun-Yu
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Hsieh, Wen-Feng
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Liu, Yi-Wei
;
Shy, Jow-Tsong
The saturated absorption spectrum of the 6P(3/2) -> 7S(1/2) transition of Tl-203 and Tl-205 in a hollow cathode lamp has been observed with a frequency-doubled 1070 nm Nd : GdVO4 laser. The third-derivative spectrum of the hyperfine components are obtained using the wavelength modulation spectroscopy and used to stabilize the laser frequency. The analysis of the error signal shows that the frequency stability reaches 30 kHz at 1 s averaging time. Such a frequency-stabilized light source at 535 nm can be used for laser cooling of thallium and for investigating the parity non-conservation effect in thallium. The absolute frequencies of hyperfine components are measured with an accuracy of 30 MHz using a precision wavelengthmeter. Including the pressure shift correction, the center of gravity of the transition frequency is determined to an accuracy of 22 MHz for both isotopes. Meanwhile, the isotope shift derived is in good agreement with earlier measurement.
Improvement on RCS reduction using flat lossy focusing reflectors
(2013-12-30)
Chin, Cheng-Yuan
;
Jou, Christina F.
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電機工程學系
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Department of Electrical and Computer Engineering
In this paper, we propose a planar non-periodic subwavelength resistive grating (SWRG). The phase front of the scattered fields can be completely manipulated through non-periodic design of the grating while high absorptivity is preserved. The SWRG has an interesting property similar to a resistive concave reflecting lens. Scattered wave is focused in the near-field region, and spread out in the far-field. This feature of non-periodic resistive grating can improve the original radar cross section (RCS) reduction up to 22.86 dB in the boresight direction comparing to the periodic counterpart. Non-periodic design of SWRG could have a substantial impact on stealth technology, aerospace engineering, and microwave anechoic chamber. (C) 2013 Optical Society of America
Investigation on amorphous InGaZnO based resistive switching memory with low-power, high-speed, high reliability
(2013-12-31)
Fan, Yang-Shun
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Liu, Po-Tsun
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Hsu, Ching-Hui
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光電工程學系
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顯示科技研究所
Recently, non-volatile memory (NVM) has been widely used in electronic devices. Nowadays, the prevailing NVM is Flash memory. However, it is generally believed that the conventional Flash memory will approach its scaling limit within about a decade. The resistive random access memory (RRAM) is emerging as one of the potential candidates for future memory replacement because of its high storage density, low power consumption as well as simple structure. The purpose of this work is to develop a reliable a-InGaZnO based resistive switching memory. We investigate the resistive switching characteristics of TiN/Ti/IGZO/Pt structure and TiN/IGZO/Pt structure. The device with TiN/Ti/IGZO/Pt structure exhibits stable bipolar resistive switching. The impact of inserting a Ti interlayer is studied by material analyses. The device shows excellent resistive switching properties. For example, the DC sweep endurance can achieve over 1000 times; and the pulse induced switching cycles can reach at least 10,000 times. Furthermore, the impact of different sputtering ambience, the variable temperature measurement, and the conduction mechanisms are also investigated. According to our experiments, we propose a model to explain the resistive switching phenomenon observed in our devices. (C) 2013 Elsevier B. V. All rights reserved.
Investigation on plasma treatment for transparent Al-Zn-Sn-O thin film transistor application
(2013-12-31)
Chang, Chih-Hsiang
;
Liu, Po-Tsun
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光電工程學系
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顯示科技研究所
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Department of Photonics
This work reported the physical characteristics and electrical performance of amorphous Al-Zn-Sn-O thin film transistor (a-AZTO TFT) device under the temperature effects of thermal annealing process and various gas plasma post-treatments. The thermal annealing at 450 degrees C could strengthen the oxygen bonding of a-AZTO film, thereby improving the film quality and TFT device performance. In addition, the oxygen deficient can be reduced effectively by the O-2 and N2O plasma treatments, respectively, leading to enhanced electrical reliability. Also, the optical energy gap of a-AZTO films with O-2 or N2O plasma treatment was measured about 3.5 eV, which indicated that all of the a-AZTO films were insensitive to visible light. On the other hand, the electron mobility of a-AZTO TFT was observed to be promoted after NH3 plasma post-treatment. The improvement could be attributed to a slight doping effect of H+ ions. These results showed the potential of post-treatments for flat panel displays applications of transparent a-AZTO TFT technology. (C) 2013 Elsevier B. V. All rights reserved.
號誌控制技術研究計畫（1/4）
(2014)
黃銘崇
;
國立交通大學
台灣地狹人稠，都市型的短程運輸，汽、機車為絕大多數民眾的主要運具選擇，加上我國交通具有許多異於國外的本土特色，包括快慢分隔的路型、兩段式的機車左轉待轉區、機車專用停等區等。這些皆會影響到號誌設計的成效，也因此使用國外所發展的號誌控制模式與軟體一直有其適用性的疑慮。民國99年至102年，交通部委託中華民國運輸學會完成四年期的計畫「交通技術研發與人才培育規劃研究」，建構適用於我國之車流模擬軟體並開發一混合車流之號誌控制最佳化軟體。本研究將延續前期成果，並以軟體產品化之角度，針對前期之軟體、模式以及演算法做強化、改良及調校，進而建立一套符合本土特色之號誌控制軟體。
選殖表現特定真菌分泌之抗真菌活性及其機制探討
(2014)
楊昀良
;
YANG YUN-LIANG
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國立交通大學生物科技學系（所）
國立交通大學光電工程學系鄒志偉教師升等送審著作論文集
(國立交通大學, 2014)
鄒志偉
A novel approach to collaborative testing in a crowdsourcing environment (vol 86, pg 2143, 2013)
(2014-01-01)
Tung, Yuan-Hsin
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Tseng, Shian-Shyong
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Tsai, Wei-Tek
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資訊工程學系
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Department of Computer Science
BAYESIAN RECURRENT NEURAL NETWORK LANGUAGE MODEL
(2014)
Chien, Jen-Tzung
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Ku, Yuan-Chu
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電機學院
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College of Electrical and Computer Engineering
This paper presents a Bayesian approach to construct the recurrent neural network language model (RNN-LM) for speech recognition. Our idea is to regularize the RNN-LM by compensating the uncertainty of the estimated model parameters which is represented by a Gaussian prior. The objective function in Bayesian RNN (BRNN) is formed as the regularized cross entropy error function. The regularized model is not only constructed by training the regularized parameters according to the maximum a posteriori criterion but also estimating the Gaussian hyperparameter by maximizing the marginal likelihood. A rapid approximation to Hessian matrix is developed by selecting a small set of salient outer-products and illustrated to be effective for BRNN-LM. BRNN-LM achieves sparser model than RNN-LM. Experiments on different corpora show promising improvement by applying BRNN-LM using different amount of training data.
When Integration Works Better than Segregation Does in Multiple-Gain Situations: The Revised Coding Rules in Mental Accounting
(2014-01-01)
Chang, Chia-Chi
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Chen, Po-Yu
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管理科學系
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Department of Management Science
Mental accounting based on the S-shape value function in prospect theory has been widely accepted since it was posited. The coding rules in mental accounting (CRMA) further suggest that segregating gains in multiple-gain situations and aggregating losses (to one big loss) in multiple-loss situations are preferred. CRMA have been then successfully applied to many fields. However, in our daily life, we can find occasions when people tend to aggregate gains in multiple-gain situations (accumulate small money from colleagues for a bigger wedding gift) or segregate losses in multiple-loss situations (phase a monthly donation amount to a smaller daily amount). The only study to date showing experiment results conflicting to CRMA, though, focuses on comparing the utility losses of two losses that happen on the same day and on different days. In this study, in order to resolve the inconsistency, we replicate Thaler\'s experiments with different dollar amounts used in both gain and loss scenarios and propose that mental threshold could be the major reason why in some situations CRMA may not be applicable. Our results show that in multiple-gain (or multiple-loss) situations, CRMA reverse when the accumulated gain (or loss) is over people\'s mental threshold while the individual gains (or losses) are not. Another finding is that in prior-gain or prior-loss situations, the original reference points can serve as a natural mental threshold. When the accumulated gain (or loss) of multiple gains (or losses) is over the original reference point (anchored by prior gains or losses) while the individual gains (or losses) are not, our experiment results show that people\'s preference on segregating gains and aggregating losses is reduced.
以脆弱度與回復力觀點建構臺灣城際與海運運輸系統之風險評估
(2014)
馮正民
;
FENG CHENG-MIN
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國立交通大學交通運輸研究所
Modifications of Control Loop to Improve the Depth Response of Autonomous Underwater Vehicles
(2014)
Hsu, Sheng-Ping
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Liu, Tzong-Shi
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機械工程學系
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Department of Mechanical Engineering
During a constant depth maneuver of an autonomous underwater vehicle (AUV), its pitch attitude and stern plane deflections create forces and moments to achieve equilibrium in the vertical plane. If an AUV has a proportional controller only in its depth control loop, then different weights or centers of gravity will cause different steady-state depth errors at trimmed conditions. In general, a steady-state depth error can be eliminated by adding an integral controller in the depth control loop. However, an improper integrator may lead to a bad transient response, even though the steady-state depth error can finally be eliminated. To remove the steady-state depth error, this study proposes methods that adjust the depth command and add a switching integral controller in the depth control loop. Simulation results demonstrate that the steady-state depth error can be eliminated and the transient response can be improved.
奈米孔洞之層狀複合材料於高溫CO2捕捉與抗劣化技術開發
(2014)
陳三元
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國立交通大學材料科學與工程學系
在本研究中，主要利用添加了第二種金屬元素進入沸石咪唑骨架中，形成混合金屬沸石咪唑骨架孔洞粉體(zeolitic imidazolate framework, ZIF)及層狀薄膜應用於CO2捕獲及H2/CO2之氣體分離。首先第一部分先合成出ZIF-M- (M=Zn or Ca)奈米粉體及分析其相關特性與CO2物理及化學吸附的協同作用。本研究利用調控溶液中鹼液之比例，接著以XRD和FTIR驗證其特徵結構及鍵結，再利用氮氣等溫吸脫附測量其比表面積、孔體積及孔洞大小，最後搭配SEM觀察表面形貌和微結構。由硝酸鋅和硝酸鈷並加入鹼液三乙胺(TEA)於室溫合成出混合金屬沸石咪唑骨架奈米孔洞粉體(ZIF-Zn-)，隨著三乙胺莫耳濃度的增加，比表面積顯著的提高，並且從表面形貌可以觀察晶體顆粒隨之減小，達到晶體顆粒約為100nm左右之粉體，接著以不同比例的Ca含量進行置換以合成出具有奈米孔洞之ZIF-Ca奈米粉體，進而探討這些奈米粉體在不同熱處理溫度下之結構的穩定性以及CO2捕捉與抗劣化效果的分析。第二部分為利用微波水熱法進行二次生長合成出Co添加於ZIF-Zn混合金屬沸石咪唑薄膜(ZIF-Zn-Co)，合成之二次生長水溶液利用UV-Vis鑑定鈷離子配位為四配位，並且調控配位鍵與鹼液濃度搭配XRD和SEM觀察薄膜生長最優化條件，最後以GPA測試混合金屬沸石咪唑骨架層狀薄膜氣體分離特性。藉由鋅金屬及鈷金屬引入沸石咪唑骨架結構中，其鈷金屬對於二氧化碳氣體具有較強作用力，故其在氣體分離試驗中呈現較低的二氧化碳穿透能力，增加了氫氣/二氧化碳分離率。因此可以進一步用來評估其對於氫氣/二氧化碳分離的效果，以同時提升CO2捕捉的技術。
High performance hybrid white OLEDs based on new platinum complexes and new blue fluorescence host
(2014-01-01)
Poloek, Anurach
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Wang, Chieh
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Lin, Chiao-Wen
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Chen, Chin-Ti
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Chen, Chao-Tsen
A new series of platinum complexes containing 4-hydroxy-1,5-naphtyridine derivative with different substitutens such as methyl, dimethyl, phenyl, phenoxy, dimethyl amine, piperidine, morpholine, phenoxazine or carbazole unit as the primary ligand and 2-(2,4-difluorophenyl)pyridine as the secondary ligand were synthesized and characterized. Single crystal X-ray diffraction studies of FPtOPhND, FPtCzND and FPtdmaND showed trans-coordinated in distorted square-planar geometry. Their photophysical properties and electrochemical properties were examined. All platinum complexes in these series exhibited dual emissions not only in solution but also in solid state thin film. Employing CBP or 4P-NPD as host material, high efficiency monochromatic and high quality hybrid white organic light emitting diodes (WOLEDs) were achieved with the single platinum complex dopant device, a relatively simple device configuration.
Polymer TSV Fabrication Scheme with Its Electrical and Reliability Test Vehicle
(2014)
Lee, Shih-Wei
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Shih, Jian-Yu
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Chuang, Ching-Te
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Hwang, Wei
;
Chiou, Jin-Chern
In this research, a novel process scheme for polymer TSV fabrication is proposed to solve the difficulty of polymer liner formation in TSV technology. The corresponding structure shows great manufacturability to replace traditional fabrication approach. In addition, Kelvin structure of the daisy chain is designed for evaluating electrical performance and reliability. Moreover, daisy chain with dummy TSV is designed to verify the impact of TSV pitch on TSV fabrication by using electrical measurement. The reliability tests include thermal cycling and humidity test to verify the quality of proposed polymer TSV design. Finally, a void-free polymer TSV with uniform liner formation is successfully fabricated and demonstrated.
影像追蹤系統及其影像追蹤方法
(2014-01-01)
宋開泰
;
陳俊儒
本發明係揭露一種影像追蹤系統及其影像追蹤方法，影像追蹤系統包含一影像擷取模組、一偵測模組及一處理模組。影像擷取模組係擷取即時影像。偵測模組係分析即時影像，並偵測複數個器械之位置是否位於即時影像內。處理模組於即時影像中定義緩衝區域，根據該些器械之位置分析該些器械是否位於即時影像之緩衝區域內，並處理模組計算該些器械間之間隔距離，且判斷該些器械間之間隔距離是否小於預設距離。當間隔距離小於預設距離，則處理模組發出控制訊號以控制影像擷取模組移動至擷取位置。如此一來，本發明可即時完成影像追蹤，並提供穩定的影像。
Dark Matter Induced Neutrino Signature in IceCube DeepCore Detector
(2014-01-01)
Lee, Fei-Fan
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Lin, Guey-Lin
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Tsai, Yue-Lin Sming
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物理研究所
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Institute of Physics
The installation of DeepCore array significantly lowers IceCube\'s energy threshold to about 10 GeV and enhances the sensitivity of detecting neutrinos from annihilations and decays of light dark matter. To match this experimental development, we discuss decays of the event rate in DeepCore array due to neutrino flux produced by annihilations and galactic dark matter. This event rate is calculated with a 10 GeV threshold energy, which is smaller than the threshold energy taken in previous works. Taking into account the background event rate due to the atmospheric neutrino flux, we evaluate the sensitivity of DeepCore array for probing dark matter annihilation cross section and decay time. We compare our results with corresponding constraints derived from observations of WMAP, ACT and Fermi-LAT.
Z-scheme奈米異質結構其界面載子動力學研究
(2014)
徐雍鎣
;
Hsu Yung-Jung
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國立交通大學材料科學與工程學系（所）
Exploring the Effects of Information Processing Perceptions on Consumers\' Website Advice Continuance Intention
(2014-01-01)
Wang, Hui-Chih
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Doong, Her-Sen
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交大名義發表
;
National Chiao Tung University
With the rapid evolution of e-commerce, individuals\' daily lives are affected not only by information systems but also by the information offered via these systems. Webstore advice, which serves as a virtual salesperson to facilitate consumers\' online purchasing, is an important example, considering how frequently successful e-tailers are using this information service. However, existing information system studies mainly test consumers\' perceptions towards or re-usage of systems only: the information level has been largely neglected despite its popularity at actual Webstores. Specifically, few studies have uncovered why consumers continue to use Webstore advice from the lens of information processing. This study thus pioneered the integration of perceived fit and trust into the expectation disconfirmation theory to explore consumers\' satisfaction and continuance intentions towards Webstore advice at the information level. Based on empirical data, findings supported all the hypotheses proposed. Practical implications are discussed.
在個人、社群與產業三構面下之遊戲模組玩家的行為意義
(2014)
林應嘉
;
Ying-Chia Lin
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Department of Communication and Technology
;
傳播與科技學系
本文以數位遊戲模組玩家為研究中心，探討其模組之動機以及模組的意義和價值。主要研究目的在於勾勒模組玩家所處情境脈絡的多重面貌，以及這些因素如何與其模組經驗構連。透過文獻探討與深入訪談，得知國內模組玩家基本動機為獲得不同種類的愉悅感、滿足個人創作慾望、維護人際關係、獲取金錢和知識等。遊戲社群則是模組作者展示自我和獲得成就感的場域，也提供集體知識的累積和交換，是模組玩家的創作能量來源。雖然模組可能危害遊戲公司的權利，但在無法全面禁止與管制的情況下，遊戲產業儘可能地吸納模組活動，而進一步地將所有的遊玩商品化。