Browsing by Issue Date, starting with "2000-12-18"

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The energy spectrum of parabolic quantum dots
(2000-12-18)
Yang, CC
;
Huang, YS
;
電子物理學系
;
Department of Electrophysics
We calculate the energy spectrum of hydrogen impurity located in the center of parabolic quantum dot. The energy levels under this model differ from the previous results for the case of spherical quantum dot. The degeneracy of the energy levels is quite different as well. However, compared with the spherical quantum dot, the energy plateau under this model is not obvious. (C) 2000 Elsevier Science B.V. All rights reserved.
高強度鋼筋用於梁剪力筋之研究
(2001)
趙文成
;
國立交通大學土木工程學系
大學生跨領域科技能力培養研究計畫---培養大學生在生物科技與電機資訊跨領域科技能力之科技教育之研究(I)
(2001)
黃遠東
;
YANG-TUNGHUANG
;
國立交通大學電子工程學系
自主整合式W-CDWA基地台接收系統---子計畫I：W-CDMA基地台接收系統之架構與性能評估(III)
(2001)
蘇育德
;
SU YU TED
;
交通大學電信工程系
嘉南平原區域性地下水觀測站井佈置檢討
(2001)
張良正
;
Chang Liang-Cheng
;
國立交通大學防災工程研究中心
　　本計畫目標在配合嘉南平原及蘭陽平原新設觀測井所產生之水文地質資料，配合水文地質含水層分析及區域變數理論等較嚴謹的監測網規劃分析的方法，對嘉南平原、蘭陽平原及澎湖本島等地區進行地下水觀測站網站井位置、深度等之檢討並作出具體的建議。並為配合其他地震前後地下水位變化相關研究，於台南白河及新竹、苗栗地區新站井位置配合建議一至二口觀測井。
The state question in Chinese popular cultural studies
(Routledge, 2001)
J. Wang
38 GHz high-directivity planar leaky-mode antenna array
(2001)
Hung, TP
;
Tzuang, CKC
;
電信工程研究所
;
Institute of Communications Engineering
This paper resents a high-directivity planar microstrip antenna array operating at microwave frequency. The antenna array consists of 48 sub-arrays, and each sub-array comprises 4 elements. The radiation mechanism of the single element, by exciting the first higher order mode (EH, mode), can be estimated by the full-wave analysis. Through appropriately arranging and feeding these 192 single elements, the radiated characteristic of the antenna performs narrow radiation beamwidth both in azimuth (AZ) and elevation (EL), thus achieving high directivity. The planar microstrip antenna array prototype is built and tested at 38GHz by traditional printed circuit board (PCB) fabricating process. The measurement result indicates the high directivity of 22.3dB and the 3-dB beamwidth of 8degrees/12degrees (AZ/EL) at the elevated angle 30.2degrees away from the broadside direction.
介觀及無序金屬中電子相位破壞時間之量測(III)
(2001)
林志忠
;
LIN JUHN-JONG
;
國立交通大學物理研究所
Chemical modification of dicyclopentadiene-based epoxy resins to improve compatibility and thermal properties
(2001)
Hsiue, GH
;
Wei, HF
;
Shiao, SJ
;
Kuo, WJ
;
Sha, YA
A. series of siloxane-containing epoxy resins was obtained by curing dicyclopentadiene-containing epoxy DG with the silicon-containing curing agents TS, DS, and AS. Curing behavior was studied using DSC, and the activation energies of the DG curing reaction with curing agents TA, DS, and AS were found to be 59, 80, and 157 KJ/mol. Meanwhile, the curing reaction of DG with diamines was found to be a first-order reaction using Arrhenius plots. In addition, thermal stability and the weight loss behavior of the cured polymers were studied via TGA. The silicon-containing resins displayed higher weight loss temperatures and higher char yields than the silicon-free resin. The activation energies of degradation ranged from 108 to 206 KJ/mol. The morphology of the cured pieces were investigated using SEM. The DG/TS and DG/DS are more compatible between the epoxy and the curing agents than DG/AS. The limited oxygen index (LOI) values of 31 to 34 for the DG-based resin confirmed the effectiveness of silicon-containing epoxy resins as flame retardants. (C) 2001 Elsevier Science Ltd. All rights reserved.
A trustworthy Internet auction model with verifiable fairness
(2001)
Liao, GY
;
Hwang, JJ
;
資訊管理與財務金融系註：原資管所+財金所
;
Department of Information Management and Finance
Describes a novel Internet auction model achieving verifiable fairness, a requirement aimed at enhancing the trust of bidders in auctioneers. Distrust in remote auctioneers prevents bidders from participating in Internet auctioning. According to proposed survey reports, this study presents four characteristics that render the Internet untrustworthy for bidders. These intrinsic properties suggest that auction sites not only follow auction policies, but provide customers with evidence validating that the policies are applied fairly. Evidence of verifiable fairness provides bidders with a basis for confidence in Internet auctions. Cryptographic techniques are also applied herein to establish a novel auction model with evidence to manifest and verify every step of the auctioneer. Analysis results demonstrate that the proposed model satisfies various requirements regarding fairness and privacy. Moreover, in the proposed model, the losing bids remain sealed.
Implicit deregistration with forced registration for PCS mobility management
(2001)
Pang, AC
;
Lin, YB
;
Fang, YG
;
資訊工程學系
;
Department of Computer Science
Registration/deregistration with a mobility database called Visitor Location Registers (VLRs) is required in a PCS network when a mobile phone moves between registration areas. Several schemes were proposed to deregister a mobile phone after it moves out of a registration area. A simple scheme, called implicit deregistration, is studied in this paper, which does not specifically deregister any obsolete record in the VLR. If the VLR is full when a mobile phone arrives, a record in the VLR is deleted and the reclaimed storage is reassigned to the incoming mobile phone. It is possible that a valid record will be deleted. If so, the VLR record of a mobile phone may be deleted before a call to the mobile phone arrives. Our previous work assumed that the incoming call setup would be lost. In this paper, we propose forced registration to restore the VLR record before the call setup operation can proceed. With this modification, implicit deregistration totally eliminates the deregistration traffic at the cost of creating some forced registration traffic. We derive the record-missing probability and the portion of the network traffic saved by implicit deregistration. Our study indicates that implicit deregistration with forced registration may significantly reduce the deregistration traffic if the user mobility is high and the number of mobile phones in a registration area is not very large.
寬頻分碼多重進接無線通訊上鏈傳收系統之設計與製作---子計畫III：寬頻分碼多重進接無線通訊之同步與耙狀接收機研究及設計(III)
(2001)
陳紹基
;
CHEN SAU-GEE
;
交通大學電子工程研究所
低掠角入射海波之電磁散射分析
(2001)
黃瑞彬
;
HWANG RUEY BING
;
國立交通大學電子與資訊研究中心
Post-colonialism and Diasporic space in Japan
(Routledge, 2001)
K. Sangjung
單晶片第四代寬頻無線通訊系統設計技術之研究---子計畫III：高效能之快速傅立葉轉換演算法、架構設計及其在數位通信上的應用
(2001)
陳紹基
;
CHEN SAU-GEE
;
交通大學電子工程研究所
新穎元件架構實驗型高密度波長多工通訊網路系統整合研究---子計畫一：高密度分波多工技術應用於全光網路的光交換與波長繞徑之研究(I)
(2001)
祁甡
;
CHI SIEN
;
國立交通大學光電工程研究所
What was given over, given over?
(Routledge, 2001)
T. E. Barlow
高科技廠商生產區位決策與供應商選擇模式之研究
(2001)
許巧鶯
;
HSU CHAUG-ING
;
國立交通大學運輸科技與管理學系
2.4 V-operated enhancement mode PHEMT with 32 dBm output power and 61 % power efficenciecy
(2001)
Chen, SH
;
Chang, EY
;
Lin, YC
;
材料科學與工程學系
;
Department of Materials Science and Engineering
A 2.4 V operated enhancement-mode pseudormorphic high electron mobility transistors (E-PHEMTs) with high output power and power-added-efficiency (PAE) have been developed. With optimally designed epitaxial structure and gate recess process, the E-PHEMT shows high power performance and high power gain. Under 2.4 V bias at 1.9 GHz, the E-PHEMT shows maximum output power of 32.25 dBm and maximum power-added efficiency of 61.45% with linear power gain of 13.93 dB when the device was tuned for maximum output power match. When tuned for maximum output power added efficiency, the E-PHEMT can achieve a maximum PAE of 78.51%. The developed E-PHEMT with superior power performance is one of the candidates for power amplifiers used for 2.4 V-operated 3G wireless communication system.
Exploration of Web users' search interests through automatic subject categorization of query terms
(2001)
Pu, HT
;
Chuang, SL
;
Yang, C
;
交大名義發表
;
National Chiao Tung University
Web query term logs from Internet search engines provide an unobtrusive source for understanding users' search interests. To make the subject categorization of Web query terms more efficient and adaptive, an automatic or computer-aided mechanism is needed. The purpose of this paper is therefore to propose a mechanism that carefully integrates human and machine efforts to explore Web users' search interests. The approach is designed to consist of a four-step process including the extraction of core terms, construction of subject taxonomy, automatic subject categorization of query terms, and observation of users' search interests. Some experiments have been conducted, and the preliminary results show that it is possible to categorize query terms into a pre-defined subject taxonomy which helps to explore users' search interests by online monitoring the distribution of subject categories and the composed query terms in real time. The research findings are proved valuable for enhancing Web IR (Information Retrieval) systems and Web content organization.