Browsing by Issue Date, starting with "2009-09-17"

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METHOD FOR OFDM AND OFDMA CHANNEL ESTIMATION
(2009-09-17)
HUNG, Kun-Chien
;
Lin, David W.
This invention discloses a method for OFDM and OFDMA channel estimation via phase-rotated polynomial interpolation and extrapolation (inter/extra-polation). For complexity reason, polynomial inter/extra-polation is an often considered method for channel estimation in orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple access (OFDMA) systems, in which the simplest choice is linear inter/extra-polation. But the performance of this method depends on the accuracy of symbol timing estimation as well as the channel delay spread. The invention mitigates the problem by adding a linear phase factor to polynomial inter/extra-polation, which corresponds to adding a delay (also called delay shift) in the time domain.
從大學生到地球人
(2009-09-17)
王文華
;
開放教育推動中心
;
Open Education Office
課程日期： 2009年09月17日(四) 演講人：王文華先生內容摘要：王文華先生透過分享自身在大學的經驗，來鼓勵現在的大學生多多學習。所謂的學習指的不只是知識上的精進，也要認識自己、增進社交技巧，例如和同學、室友的相處等，這些都是在以前求學生涯中不會碰到的問題。內容：影音實況影音(*.flv檔) 實況影音(*.wmv檔)
OPTICAL AMPLIFIER FOR TUNING TRANSMISSION TIME OF OPTICAL SIGNAL
(2009-09-17)
CHEN, Jyehong
;
Kao, Wei-Che
;
Peng, Peng-Chun
;
Lin, Chun-Ting
;
Shih, Po Tsung
The present invention relates to a technique for tuning the transmission time of optical signal, which adopts an optical amplifier with a bending structure for enhancing the tunable time of optical signal. The effect of tunable time of optical signal can be achieved by adjusting the gain of the optical amplifier.
Passive matrix organic light emitting diode display device
(2009-09-17)
Meng, Hsin-Fei
;
Horng, Sheng-Fu
;
Chao, Yu-Chiang
A passive matrix organic light emitting diode display device comprises a plurality of vertical organic light emitting transistors, each having a first collector, a first grid/base, and a first emitter. Therein, the first collectors are electrically connected and arranged parallelly to form a plurality of first scan units, and the first grids/bases are electrically connected and arranged parallelly to form a plurality of second scan units, while the first emitters are integrated into a common electrode, in which the first scan units and the second scan units are perpendicularly crossed. By perpendicularly combining vertical transistors onto organic light emitting diodes so as to drive the organic light emitting diodes, an active area as well as a luminance of the organic light emitting diode display device are enhanced and consequently an aperture ratio of each pixel unit in the organic light emitting diode display device is increased.
高分子太陽電池の有機活性層材料溶液およびその製造方法
(2009-09-17)
陳方中
;
曾信展
;
葛祖榮
【課題】高分子太陽電池の製造工程を簡素化し、高分子太陽電池の光電変換効率を高める。【解決手段】有機活性層材料溶液は、有機活性層材料、第１の有機溶媒及びより沸点の高い第２の有機溶媒から構成される。第１の有機溶媒の沸点は５０～２００℃であり、第２の有機溶媒の沸点は１５０～３００℃である。第２の有機溶媒を第１の有機溶媒に加え、有機活性層材料を溶解する。第２の有機溶媒の沸点は高い（揮発速度が遅い）ので有機活性層溶液の揮発速度を低下させるため、溶液アニールにおける環境を有機活性層溶液を高飽和蒸気圧環境または密閉環境に維持する必要がなく、高分子太陽電池の製造工程を簡素化し、高分子太陽電池の光電変換効率を高めることができる。【選択図】図２
Vertical organic light emitting transistor assembly and horizontal organic light emitting transistor assembly
(2009-09-17)
Meng, Hsin-Fei
;
Horng, Sheng-Fu
;
Chao, Yu-Chiang
A vertical organic light emitting transistor assembly and-a horizontal organic light emitting transistor assembly are provided. The vertical organic light emitting transistor assembly comprises a first/second vertical transistor and a first/second organic light emitting diode perpendicularly integrated with the first/second vertical transistor, respectively. The horizontal organic light emitting transistor assembly comprises a substrate, a third vertical transistor and a third organic light emitting diode. The third vertical transistor and the third organic light emitting diode are arranged abreast on the substrate. By integrating the organic light emitting diode and the vertical transistor into a unitary electronic element, the vertical transistor can efficiently drive the organic light emitting diode so that the organic light emitting transistor assembly can overcome limitations caused by existing manufacturing processes and adapt to extensive applications.
TRANSIENT TO DIGITAL CONVERTERS
(2009-09-17)
Ker, Ming-Dou
;
Yen, Cheng-Cheng
;
Liao, Chi-Sheng
;
Chen, Tung-Yang
A digital converter including a first adjustment unit and a first transient detection unit. The first adjustment unit adjusts amplitude of an electrostatic discharge (ESD) pulse to generate a first adjustment signal when an ESD event occurs in a first power line and a second power line is at a complementary level. The first transient detection unit generates a first digital code according to the first adjustment signal.
98（上）服務學習教師培訓－光電系余沛慈老師經驗分享
(2009-09-18)
余沛慈
;
開放教育推動中心
;
Open Education Office
課程日期： 2009年09月18日(五) 演講人：光電系余沛慈老師內容摘要：余沛慈老師於本學期教師培訓課程中，應邀分享帶領「eKID光電未來式」營隊之經驗。余老師首先說明「eKID光電未來式」營隊是與國家實驗研究願國家高速網路與計算中心、明碁友達基金會合作，光電系同學可透過科學志工的服務學習方式，將自己所學的專業知識融入之中。內容：影音實況影音(*.flv檔)
98（上）服務學習教師培訓－電工系邱碧秀老師經驗分享
(2009-09-18)
邱碧秀
;
開放教育推動中心
;
Open Education Office
課程日期： 2009年09月18日(五) 演講人：交通大學電子工程學系邱碧秀老師內容摘要：邱碧秀老師於本學期教師培訓課程中，應邀分享帶領電子工程學系服務學習課程之經驗。邱老師希望藉由服務學習，能夠讓電工系這些全國頂尖的學生培養較大的心量，而不是成為只會唸書的「科學怪人」。內容：影音實況影音(*.flv檔)
交大e-News第056期
(2009-09-21)
Secretariat
;
國立交通大學秘書室
Voltage-tunable two-color quantum-dot infrared photodetectors
(2009-09-21)
Lin, Shih-Yen
;
Lin, Wei-Hsun
;
Tseng, Chi-Che
;
Chao, Kuang-Ping
;
Mai, Shu-Cheng
A two-terminal quantum-dot infrared photodetector with stacked five-period InAs/GaAs and InGaAs-capped InAs/GaAs quantum-dot (QD) structures is investigated. The device has exhibited distinct responses at mid-wavelength and long-wavelength infrared regions under positive and negative biases, respectively. The results suggest that the QD confinement states near the anode side are completely filled, such that selective responses at different wavelength ranges would be observed for the stacked structure under different voltage polarities. Also observed are the similar absorption ratios of the device under different incident light polarizations at the two response regions. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3236543]
Wave properties of an annular periodic multilayer structure containing the single-negative materials
(2009-09-21)
Chen, Mei-Soong
;
Wu, Chien-Jang
;
Yang, Tzong-Jer
;
電子物理學系
;
Department of Electrophysics
The optical properties of an annular periodic multilayer structure containing two kinds of single-negative materials are theoretically investigated based on the transfer matrix method of the cylindrical waves. At the azimuthal mode number m >= 1 and near the magnetic plasma frequency and the electronic plasma frequency for the TE wave and TM wave, respectively. we find that there is an additional high-reflectance band and some reflection dips exist when the plasma frequency is located in the photonic band gap. These two special features arising from the higher order azimuthal mode of the cylindrical waves are not seen in the planar one-dimensional Bragg reflector consisting of the single-negative materials. Such filtering responses provide a feasible way of designing a narrowband resonator without physically introducing any defect layer in the structure. (C) 2009 Elsevier B.V. All rights reserved.
An Unprecedentedly Huge Square-Grid Copper(II)-Organic Framework Material Built from a Bulky Pyrene-Derived Elongated Cross-Shaped Scaffold
(2009-09-21)
Tsai, Chen-Chuan
;
Luo, Tzuoo-Tsair
;
Yin, Jen-Fu
;
Lin, Hong-Cheu
;
Lu, Kuang-Lieh
A new bulky pyrene-derived elongated cross-shaped organic scaffold was successfully incorporated into a highly porous, non-interpenetrated square-grid copper(II)-organic framework material with the unprecedentedly huge dimensions of 25.5 x 25.5 angstrom(2), while the layer-to-layer NH center dot center dot center dot N interaction leads to a unique hydrogen-bonded 6(4).8(2)-nbo net.
Application of secondary electron potential contrast on junction leakage isolation
(2009-09-21)
Liu, Po-Tsun
;
Lee, Jeng-Han
;
Huan, Y. S.
;
Su, David
;
光電工程學系
Secondary electron potential contrast (SEPC) technology with an in situ dynamic trigger was studied to inspect P(+)/N-well junction leakage arising from P-well misalignment in a static random access memory cell. Combining SEPC with scanning electron microscopy observations allows direct identification of the junction shift. Furthermore, an in situ negative bias applied to the P-well can create a wider depletion region and eliminate the leakage path in P(+)/N-well contacts, allowing the P(+)/N well to operate normally. This proposed in situ dynamic trigger method is a promising and effective approach to investigating device physics under a dynamic scope. (C) 2009 American Institute of Physics. [doi:10.1063/1.3233963]
Structural and optical properties of buried InAs/GaAs quantum dots on GaAsSb buffer layer
(2009-09-21)
Wu, Y. H.
;
Chang, Li
;
Lin, P. Y.
;
Chiang, C. H.
;
Chen, J. F.
In this work, we investigated the effect of a 1 nm thick GaAs(94.3)Sb(0.57) buffer layer on structural and optical properties of buried InAs quantum dots (QDs) and wetting layers (WLs) in GaAs using photoluminescence (PL) and transmission electron microscopy (TEM). The density and emission wavelength of the QDs on the buffer were increased due to the size and the shape modification in comparison with those without a buffer. PL analysis of the ground-state (GS) peak of the QDs on the buffer showed a red-shift of 18 meV with an enhanced intensity. In addition, PL and TEM show that the buffer has a weak effect on the WLs and no apparent changes occur for the buffer during QD deposition and the capping process.
Synthesis of Photoisomerizable Block Copolymers by Atom Transfer Radical Polymerization
(2009-09-22)
Huang, Chih-Feng
;
Chen, Wei
;
Russell, Thomas P.
;
Balazs, Anna C.
;
Chang, Feng-Chih
A series of polystyrene-block-poly(n-butyl methacrylate) (PS-b-PnBMA) diblock copolymers (di-BCPs) with an azobenzene moiety [trans-4-methacryloyloxyazobenzene (MOAB)] in the PnBMA segment was prepared by atom transfer radical polymerization (ATRP). P(nBMA-co-MOAB) macroinitiators were prepared by activators regenerated by electron transfer (ARGET) ATRP. The MOAB was slightly more reactive than nBMA, resulting in a weak gradient fashion of copolymer. The macroinitiators were subsequently chain-extended with styrene. Acceleration of the ATRP rate was observed in the presence of a reducing agent. P(nBMA-co-MOAB)-b-PS di-BCPs were obtained with relatively narrow molecular weight distributions ((M) over bar (w)(M) over bar (n) = 1.16-1.49) and the molecular weights were in good agreement with the theoretical values. The efficiency of photoisomerization of the MOAB units was above 80%. DSC traces showed a single T(g) suggesting the block copolymers were miscible before UV irradiation. After UV irradiation, the X-ray reflectivity measurements showed the beating of two frequencies, indicating the formation of island-hole structure.
Method for modulating refractive indices of optical fiber gratings
(2009-09-22)
Hsu
;
Kuei Chu
;
Lai
;
Yin Chieh
The present invention proposes a method for modulating refractive indices of optical fiber gratings, wherein the UV exposure on a least one assigned location of an optical fiber grating is divided into to two UV shots, and the intensities or phases of the two UV shots, which expose the location sequentially, are controlled to make the total exposure intensity of one assigned location maintained at a fixed value, whereby the interference fringes, which are created by a superposition of the two UV shots, have fixed phases and adjustable intensities, and whereby the dc index of the optical fiber grating maintains fixed and the ac index independently adjustable.
一個全人的大學教育經驗：服務學習
(2009-09-23)
程萬里
;
開放教育推動中心
;
Open Education Office
課程日期： 2009年09月23日(三) 演講人：中原大學程萬里內容摘要：程萬里校長先以探討大學教育的內涵作為開端，引用了數位先哲對於教育的見解，將大學教育與全人教育作連結。大學生應該期待在大學生涯中，能夠得到教學、研究與服務的經驗。內容：影音實況影音(*.flv檔)
Compact single-to-balanced bandpass filter
(2009-09-24)
Chung, Shyh-Jong
;
Chen, Kun-Tzu
A compact single-to-balanced bandpass filter is proposed in this invention. Firstly, a pre-design circuit is presented, which is composed of an inductive coupled-line (ICL) bandpass filter and an out-of-phase capacitive coupled-line (CCL) bandpass filter. A novel compact circuit with three coupled lines configuration, derived from the pre-design circuit, is then proposed for miniaturizing the single-to-balanced bandpass filter. In order to verify the feasibility of the proposed structure, a 2.4 GHz multilayer ceramic chip type single-to-balanced bandpass filter with size of 2.0 mm×1.2 mm×0.7 mm is developed. The filter is designed by using circuit simulation as well as full-wave electromagnetic (EM) simulation softwares, and fabricated by the use of low-temperature co-fire ceramic (LTCC) technology. The measured results agree quite well with the simulated. According to the measurement results, the maximum insertion loss is 1.65 dB, the maximum in-band phase imbalance is within 3 degrees, and the maximum in-band magnitude imbalance is less than 0.32 dB.
LEAPING ITERATIVE COMPOSITION METHOD OF COMPLICATED GRAPHIC AND STORAGE MEDIUM HAVING COMPUTER PROGRAM EXECUTING THE SAME
(2009-09-24)
CHEN, Ming-Jang
A leaping iterative composition method of a complicated graphic and a storage medium having a computer program executing the same are described. First, an initiator and generators are set. After several times of iterating, a transitional object is formed. Then, a leaping recursion is performed based on this transitional object. When performing the leaping recursion, a generator of each of the iterations is designed by a single pattern converted from a structural result of a previous iteration added with a base object. Since the result of each of the iterations keeps the original structure, the structure is used as the input initiator. The initiator of the first iteration can be a feature of different iteration objects. Since the input structure of iterations are the same, the advantage of reducing computing resources and avoid system overload are reachable.