Browsing by Issue Date, starting with "2014-08-16"

Now showing 1 - 20 of 25784

電性連接結構及其製備方法
(2014-08-16)
陳智
;
劉道奇
;
黃以撒
;
劉健民
本發明係有關於一種用以電性連接一第一基板及一第二基板之電性連接結構及其製備方法,其中製備方法包括:(A)提供一第一基板及一第二基板,其中第一基板上係設有一第一銅膜,第二基板上係設有一第一金屬膜,第一銅膜之一第一接合面係為一含(111)面之接合面,且該第一金屬膜具有一第二接合面;以及(B)將第一銅膜及第一金屬膜相互接合以形成接點,其中第一銅膜之第一接合面係與第一金屬膜之第二接合面相互對應。
石墨氧化物製備方法
(2014-08-16)
韋光華
;
鄧文成
一種石墨氧化物之製備方法，包含提供一電漿電解裝置，其中電漿電解裝置具有一電解液，以及電漿電解裝置之一陰極為一石墨電極；以及提供一陰極電流於石墨電極，使石墨電極進行一電漿電解反應以得到石墨氧化物。本發明藉由電漿電解程序，可在相對低溫、一般壓力及非常短的時間內，且不需濃縮酸及強氧化劑的條件下，即可製備石墨氧化物。本發明利用電漿電解程序將石墨直接製備為石墨氧化物，而不需任何事先純化。本發明之電漿電解程序相當具潛力，具有低成本、易製備、高效率及環保之優勢。
螢光增強裝置
(2014-08-16)
徐樹剛
;
張淑閔
一種螢光增強裝置包含光源、螢光材料層、第一光子晶體層及第二光子晶體層。光源可發射激發光，激發螢光材料層中的螢光材料進而發射螢光。第一光子晶體層與第二光子晶體層係設置於螢光材料層之激發光入射方向之下游。第一光子晶體層之第一光子晶體之光能隙與激發光之波長重疊，藉以反射激發光至螢光材料層。第二光子晶體層之第二光子晶體光能隙與螢光材料之螢光波長重疊，藉以反射螢光材料所發射之螢光。本發明之優勢包括可重複使用光子晶體進行感測並可增強螢光強度。
液晶聚合物透鏡結構
(2014-08-16)
陳宏山
;
林怡欣
本發明係揭露一種液晶聚合物透鏡結構，其包含折射率分佈膜、透鏡以及可撓性基材。可撓性基材係貼附於透鏡之表面，折射率分佈膜則封裝於可撓性基材中，且具有不均勻的折射率分佈。本發明之折射率分佈膜可設計成使液晶聚合物透鏡結構擁有多段式或漸進式的屈光力變化，以幫助老花眼於近距離之閱讀。
多重亮度影像處理方法
(2014-08-16)
莊仁輝
;
鄧文治
;
劉晉瑋
本發明係揭露一種多重亮度影像處理方法,其係利用一處理器執行之。首先,接收具有多重週期亮度之序列影像,並依其影像週期分成複數影像群組。接著,合併每一影像群組中的每一影像,以產生複數合併影像,並據此得到一影像序列。或者,建立複數序列,並將每一影像群組中具有同一亮度之影像按順序排列在同一序列中。然後,對每一序列之每一影像重新依序編號,以得到複數影像序列。當影像序列取得後,便可壓縮影像序列為一影像檔。本發明能改善多重亮度序列影像壓縮比,以減小影像檔案大小,並節省硬碟儲存空間。
編碼串流產生裝置、韻律訊息編碼裝置、韻律結構分析裝置與語音合成之裝置及方法
(2014-08-16)
陳信宏
;
王逸如
;
江振宇
;
謝喬華
本案係提供一種語音合成之裝置，其包括一階層式韻律模組，提供一階層式韻律模型；一韻律結構分析單元，接收一低階語言參數、一高階語言參數及一第一韻律參數，且根據該高階語言參數、該低階語言參數、該第一韻律參數及該階層式韻律模組，產生至少一韻律標記；以及一韻律參數合成單元，根據該階層式韻律模組、該低階語言參數及該韻律標記來合成一第二韻律參數。
人體通道傳輸方法以及系統
(2014-08-16)
桑梓賢
;
周世傑
;
張添烜
;
孫致晴
;
許碩文
一種人體通道傳輸方法包含以下步驟:使一第一人體通道傳輸裝置透過數種人體通道傳輸方式,分別傳送一測試訊號。藉由一第二人體通道傳輸裝置透過人體通道傳輸方式,分別接收測試訊號。根據透過各人體通道傳輸方式所接收之測試訊號,計算各人體通道傳輸方式之一訊噪比。選擇人體通道傳輸方式中,其訊噪比最大者。使第一人體通道傳輸裝置以及第二人體通道傳輸裝置間,以所選擇之人體通道傳輸方式傳輸資料。
Note on symmetric BCJ numerator
(2014-08-18)
Fu, Chih-Hao
;
Du, Yi-Jian
;
Feng, Bo
;
電子物理學系
;
Department of Electrophysics
We present an algorithm that leads to BCJ numerators satisfying manifestly the three properties proposed by Broedel and Carrasco in [42]. We explicitly calculate the numerators at 4, 5 and 6-points and show that the relabeling property is generically satisfied.
Crystal structure and molecular packing of an asymmetric giant amphiphile constructed by one C-60 and two POSSs
(2014-08-18)
Lin, Ming-Champ
;
Hsu, Chih-Hao
;
Sun, Hao-Jan
;
Wang, Chien-Lung
;
Zhang, Wen-Bin
Based on our recent understanding and development of functionalized molecular nanoparticles (MNPs) as building blocks for constructing various giant molecules, we report our efforts on design and synthesis of an asymmetric giant amphiphile, diBPOSS-C-60, composed of one [60]fullerene (C-60) covalently linked with two isobutyl-functionalized polyhedral oligomeric silsesquioxane (BPOSS) MNPs. Its crystal structure and molecular packing were investigated. The compositional asymmetry between C-60 and BPOSS led to a "sandwich-layered" molecular packing scheme, where a single layer of C-60 is sandwiched between double BPOSS layers: a so-called "one-and-half-layered" structure. Within these layers, the molecules further organized into crystalline arrays. Interestingly, this compound can be viewed as size amplification of a class of atomically thin, two-dimensional layered transition metal dichalcogenides with the "one-and-half-layered" structure. 2014 Elsevier Ltd. All rights reserved.
Crystal structure and molecular packing of an asymmetric giant amphiphile constructed by one C-60 and two POSSs
(2014-08-18)
Lin, Ming-Champ
;
Hsu, Chih-Hao
;
Sun, Hao-Jan
;
Wang, Chien-Lung
;
Zhang, Wen-Bin
Based on our recent understanding and development of functionalized molecular nanoparticles (MNPs) as building blocks for constructing various giant molecules, we report our efforts on design and synthesis of an asymmetric giant amphiphile, diBPOSS-C-60, composed of one [60]fullerene (C-60) covalently linked with two isobutyl-functionalized polyhedral oligomeric silsesquioxane (BPOSS) MNPs. Its crystal structure and molecular packing were investigated. The compositional asymmetry between C-60 and BPOSS led to a "sandwich-layered" molecular packing scheme, where a single layer of C-60 is sandwiched between double BPOSS layers: a so-called "one-and-half-layered" structure. Within these layers, the molecules further organized into crystalline arrays. Interestingly, this compound can be viewed as size amplification of a class of atomically thin, two-dimensional layered transition metal dichalcogenides with the "one-and-half-layered" structure. 2014 Elsevier Ltd. All rights reserved.
Effects of threading dislocations on drain current dispersion and slow transients in unpassivated AlGaN/GaN/Si heterostructure field-effect transistors
(2014-08-18)
Ghosh, Saptarsi
;
Dinara, Syed Mukulika
;
Mukhopadhyay, Partha
;
Jana, Sanjay K.
;
Bag, Ankush
Current transient analysis combined with response to pulsed bias drives have been used to explore the possibilities of threading dislocations affecting the current dispersion characteristics of AlGaN/GaN heterostructure field-effect transistors (HFETs). A growth strategy is developed to modulate the dislocation density among the heterostructures grown on silicon by plasma-assisted molecular-beam epitaxy. Slow pulsed I-V measurements show severe compressions and appear to be significantly dependent on the threading dislocation density. By analyzing the corresponding slow detrapping process, a deep-level trap with emission time constant in the order of seconds was identified as the cause. Among the specimens, both in the epilayers and at the surface, the number of dislocations was found to have a notable influence on the spatial distribution of deep-level trap density. The observations confirm that the commonly observed degraded frequency performance among AlGaN/GaN HFETs in the form of DC-radio frequency dispersions can at least partly be correlated with threading dislocation density. (C) 2014 AIP Publishing LLC.
Toward epitaxially grown two-dimensional crystal hetero-structures: Single and double MoS2/graphene hetero-structures by chemical vapor depositions
(2014-08-18)
Lin, Meng-Yu
;
Chang, Chung-En
;
Wang, Cheng-Hung
;
Su, Chen-Fung
;
Chen, Chi
Uniform large-size MoS2/graphene hetero-structures fabricated directly on sapphire substrates are demonstrated with layer-number controllability by chemical vapor deposition (CVD). The cross-sectional high-resolution transmission electron microscopy (HRTEM) images provide the direct evidences of layer numbers of MoS2/graphene hetero-structures. Photo-excited electron induced Fermi level shift of the graphene channel are observed on the single MoS2/graphene hetero-structure transistors. Furthermore, double hetero-structures of graphene/MoS2/graphene are achieved by CVD fabrication of graphene layers on top of the MoS2, as confirmed by the cross-sectional HRTEM. These results have paved the possibility of epitaxially grown multi-hetero-structures for practical applications. (C) 2014 AIP Publishing LLC.
Double-graded bandgap in Cu(In,Ga)Se-2 thin film solar cells by low toxicity selenization process
(2014-08-18)
Wang, Yi-Chih
;
Shieh, Han-Ping D.
;
交大名義發表
;
光電工程學系
;
顯示科技研究所
A low-toxic selenization with post gallium diffusion (PGD) treatment has been demonstrated to increase the bandgap in the surface Cu(In,Ga)Se-2 (CIGSe) absorbers and to form double-graded bandgap profiles to improve the cell efficiency. The CIGSe absorber with PGD for 5 min increased open-circuit voltage from 0.49 to 0.66V and efficiency from 9.2% to 13.2%, contributed by the enhancement of carrier recombination in the space-charge region. The reduction in short-circuit current from 30.8 to 29.9 mA/cm(2), attributed to the absorption loss in long-wavelength regions, can be potentially improved by further optimization of the minimum bandgap value in gradient valley. (C) 2014 AIP Publishing LLC.
Method to determine fiducial point for holographic data storage
(2014-08-19)
Ou-Yang Mang
;
Chen Yu-Ta
A method to determine a fiducial point for holographic data storage is disclosed, which utilizes a gray-level frame to sequentially retrieve a regional image used as a retrieved image with the size equal to that of the frame from a received gray-level image. The gray-level frame is compared with each retrieved image to obtain a plurality of values and construct a 2D proto-matrix. The 2D proto-matrix is transformed into a 2D matrix via letting the values smaller than 0 be 0. The 2D matrix and a retrieving matrix, which has a dimensionality equal to or smaller than that of the frame, are used to obtain an anchor matrix. A greatest value in the central region of the 2D matrix is found to function as an anchor value according to the anchor matrix, thereby find a fiducial point in the gray-level image.
Phase-locked loop
(2014-08-19)
Chen Wei-Zen
;
Wang Yan-Ting
The PLL includes a voltage-controlled oscillator (VCO), a frequency down conversion circuit, a phase-frequency detector (PFD), and an adjusting circuit. The VCO is configured to generate an output clock signal. The frequency down conversion circuit is configured to receive the output clock signal and an auxiliary clock signal, and to mix the output clock signal and the auxiliary clock signal to generate a feedback clock signal. By detecting the strength of the feedback clock signal, it provides an auxiliary signal to adjust the frequency of the output clock signal. The PFD is configured to compare the frequencies and the phases of the feedback clock signal and a reference clock signal to generate an adjusting signal. The adjusting circuit is configured to receive the adjusting signal, and to adjust the frequency of the output clock signal generated by the VCO according to the adjusting signal.
In Vivo Live Cell Imaging for the Quantitative Monitoring of Lipids by Using Raman Microspectroscopy
(2014-08-19)
Hosokawa, Masahito
;
Ando, Masahiro
;
Mukai, Shoichiro
;
Osada, Kyoko
;
Yoshino, Tomoko
A straightforward in vivo monitoring technique for biomolecules would be an advantageous approach for understanding their spatiotemporal dynamics in living cells. However, the lack of adequate probes has hampered the quantitative determination of the chemical composition and metabolomics of cellular lipids at single-cell resolution. Here, we describe a method for the rapid, direct, and quantitative determination of lipid molecules from living cells using single-cell Raman imaging. In vivo localization of lipids in the form of triacylglycerol (TAG) within oleaginous microalga and their molecular compositions are monitored with high spatial resolution in a non-destructive and label-free manner. This method can provide quantitative and real-time information on compositions, chain lengths, and degree of unsaturation of fatty acids in living cells for improving the cultivating parameters or for determining the harvest timing during large-scale cultivations for microalgal lipid accumulation toward biodiesel production. Therefore, this technique is a potential tool for in vivo lipidomics for understanding the dynamics of lipid metabolisms in various organisms.
Effect of grain orientations of Cu seed layers on the growth of < 111 >-oriented nanotwinned Cu
(2014-08-19)
Liu, Chien-Min
;
Lin, Han-Wen
;
Lu, Chia-Ling
;
Chen, Chih
;
材料科學與工程學系
We investigate the growth of Cu films on two different Cu seed layers: one with regular < 111 >-oriented grains and the other with very strong < 111 >-preferred orientation. It is found that densely-packed nanotwinned Cu (nt-Cu) can be grown by pulsed electroplating on the strong < 111 >-oriented Cu seed layer without a randomly-oriented transition layer between the nt-Cu and the Cu seed layer. The electroplated nt-Cu grow almost epitaxially on the seed layer and formed < 111 >-oriented columnar structures. However, with the regular < 111 >-oriented Cu seed, there is a randomly-oriented transition layer between the nt-Cu and the regular < 111 >-oriented Cu seed. The results indicate that the seed layer plays a crucial role on the regularity of < 111 >-oriented nanotwinned Cu.
交大e-News第169期
(2014-08-20)
Secretariat
;
國立交通大學秘書室
A steganographic method based on tetris games
(2014-08-20)
Ou, Zhan-He
;
Chen, Ling-Hwei
;
資訊工程學系
;
Department of Computer Science
Although various steganographic methods have been proposed that use distinct cover media, using games to hide data remains a recent development. The study presents a steganographic method based on online Tetris games, in which secret messages are embedded using a generated tetrimino sequence. Each time a person plays an online Tetris game, a new tetrimino sequence should be generated. The proposed method meets this requirement, generating a distinct stegoed tetrimino sequence for each game played. In addition, the study presents a scenario and a simulator for the proposed method. Theoretical proof and experimental results are provided to demonstrate that the proposed method is undetectable. (C) 2013 Elsevier Inc. All rights reserved.
Broadband antireflection and field emission properties of TiN-coated Si-nanopillars
(2014-08-21)
Chang, Yuan-Ming
;
Ravipati, Srikanth
;
Kao, Pin-Hsu
;
Shieh, Jiann
;
Ko, Fu-Hsiang
Broadband antireflection and field emission characteristics of silicon nanopillars (Si-NPs) fabricated by self-masking dry etching in hydrogen-containing plasma were systematically investigated. In particular, the effects of ultrathin (5-20 nm) titanium nitride (TiN) films deposited on Si-NPs by atomic layer deposition (ALD) on the optoelectronic properties were explored. The results showed that by coating the Si-NPs with a thin layer of TiN the antirefiection capability of pristine Si-NPs can be significantly improved, especially in the wavelength range of 1000-1500 nm. The enhanced field emission characteristics of these TiN/Si-NP heterostructures suggest that, in addition to the reflectance suppression in the long wavelength range arising from the strong wavelength-dependent refractive index of TiN, the TiN-coating may have also significantly modified the effective work function at the TiN/Si interface as well.