Browsing by Issue Date, starting with "2012-11-13"

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Reply to Comment on "Chemical-Composition-Dependent Metastability of Tetragonal ZrO2 in Sol-Gel-Derived Films under Different Calcination Conditions"
(2012-11-13)
Chang, Sue-min
;
Doong, Ruey-an
;
環境工程研究所
;
Institute of Environmental Engineering
Adjustable implant electrode system and implant electrode assembly thereof
(2012-11-13)
Choi Charles Tak-Ming
;
Hsu Chien-Hua
An adjustable implant electrode system comprises an adjustable implant electrode assembly and an adjustment device for adjusting the adjustable implant electrode assembly to a desired position. The adjustable implant electrode assembly comprises an implant, a plurality of electrodes, and a plurality of magnetic components. The electrodes are disposed in the implant for providing stimulating currents according to a control signal. The magnetic components are combined with the electrodes in one-to-one correspondence. The adjustment device comprises a control unit, an excitation unit, and one or more magnetic units. The control unit is used to select one or more magnetic components to be moved from the magnetic components, and the excitation unit is used to excite the selected one or more magnetic components for the same to generate a magnetic pole, and the magnetic unit is adapted to generate a magnetic field to drive the magnetic pole and accordingly move the implant.
Piezoelectric panel speaker and optimal method of designing the same
(2012-11-13)
Bai Mingsian R.
;
Tsai Yao-Kun
A piezoelectric panel speaker and an optimal method of designing the same is disclosed. In the structure of the speaker, at least one piezoelectric plate attached at a surrounding frame supports a diaphragm inside the surrounding frame. A spacer is inserted between the piezoelectric plate and the diaphragm. The structure of the piezoelectric plates fixed at the surrounding frame improves the speaker performance within the low frequency range. The finite element method is employed to build a mathematical model to simulate the sound pressure loading of the piezoelectric panel speaker. Also, the simulated annealing method is employed to approach the optimal design parameters of the speaker structure.
Dynamic overlay multicast for live multimedia streaming in urban VANETs
(2012-11-14)
Hsieh, Yi-Ling
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Wang, Kuochen
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應用化學系
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資訊工程學系
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Department of Applied Chemistry
Infotainment service has been a foreseeing trend in VANETs (Vehicular Ad Hoc Networks), and multimedia streaming has a high potential in VANET infotainment service. This paper considers the scenario of live multimedia streaming multicast to vehicles of the same group using a dynamic application layer overlay. Due to the willingness for cooperation of non-group nodes, application layer overlay multicast is more feasible than other kinds of multicast such as network-coding-based multicast and network-layer multicast. To adapt to high mobility and full of obstacles in urban VANETs, we propose an effective dynamic overlay multicast scheme for multimedia streaming, called OMV (Overlay Multicast in VANETs). The proposed OMV enhances an overlay's stability with two strategies: (1) QoS-satisfied dynamic overlay and (2) mesh-structure overlay. The QoS-satisfied strategy to adjust the overlay selects potential new parents based on their streams' packet loss rates and end-to-end delays. The mesh-structure strategy allow; a child to have multiple parents. We evaluate the proposed OMV in urban VANETs with obstacles using two real video clips to demonstrate the feasibility of the OMV for real videos. Evaluation results show that comparing the proposed OMV to Qadri et al.'s work, which is a static mesh overlay and is the best method available in VANETs, the packet loss rate is reduced by 27.1% and the end-to-end delay is decreased by 11.7%, with a small control overhead of 2.1%, on average. Comparing the proposed OMV for tree overlays to ALMA, which is for dynamic tree multicast overlays and is also the best method available in MANETs, the packet loss rate is reduced by 7.1% and the end-to-end delay is decreased by 13.1%. In addition, to address the problem of obstacle-prone urban VANETs, we also derive feasible stream rates and overlay sizes for city maps with different road section sizes. To the best of our knowledge, how to organize and dynamically adjust an application layer multicast overlay for live multimedia streaming have not been studied in existing VANET literatures. In summary, to deal with highly dynamic topologies in urban VANETs. we propose a QoS-satisfied strategy for group nodes to switch to new parents that can offer better QoS. The proposed OMV is feasible for live multimedia streaming applications, such as emergency live video transmission and live video tour guides for passengers in different vehicles that belong to the same multicast group. (c) 2012 Elsevier B.V. All rights reserved.
Decision tree-based learning to predict patient controlled analgesia consumption and readjustment
(2012-11-14)
Hu, Yuh-Jyh
;
Ku, Tien-Hsiung
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Jan, Rong-Hong
;
Wang, Kuochen
;
Tseng, Yu-Chee
Background: Appropriate postoperative pain management contributes to earlier mobilization, shorter hospitalization, and reduced cost. The under treatment of pain may impede short-term recovery and have a detrimental long-term effect on health. This study focuses on Patient Controlled Analgesia (PCA), which is a delivery system for pain medication. This study proposes and demonstrates how to use machine learning and data mining techniques to predict analgesic requirements and PCA readjustment. Methods: The sample in this study included 1099 patients. Every patient was described by 280 attributes, including the class attribute. In addition to commonly studied demographic and physiological factors, this study emphasizes attributes related to PCA. We used decision tree-based learning algorithms to predict analgesic consumption and PCA control readjustment based on the first few hours of PCA medications. We also developed a nearest neighbor-based data cleaning method to alleviate the class-imbalance problem in PCA setting readjustment prediction. Results: The prediction accuracies of total analgesic consumption (continuous dose and PCA dose) and PCA analgesic requirement (PCA dose only) by an ensemble of decision trees were 80.9% and 73.1%, respectively. Decision tree-based learning outperformed Artificial Neural Network, Support Vector Machine, Random Forest, Rotation Forest, and Naive Bayesian classifiers in analgesic consumption prediction. The proposed data cleaning method improved the performance of every learning method in this study of PCA setting readjustment prediction. Comparative analysis identified the informative attributes from the data mining models and compared them with the correlates of analgesic requirement reported in previous works. Conclusion: This study presents a real-world application of data mining to anesthesiology. Unlike previous research, this study considers a wider variety of predictive factors, including PCA demands over time. We analyzed PCA patient data and conducted several experiments to evaluate the potential of applying machine-learning algorithms to assist anesthesiologists in PCA administration. Results demonstrate the feasibility of the proposed ensemble approach to postoperative pain management.
CHINESE SPEECH RECOGNITION SYSTEM AND METHOD
(2012-11-15)
YANG Jyh-Her
;
Chiang Chen-Yu
;
Liu Ming-Chieh
;
Wang Yih-Ru
;
Liao Yuan-Fu
A Chinese speech recognition system and method is disclosed. Firstly, a speech signal is received and recognized to output a word lattice. Next, the word lattice is received, and word arcs of the word lattice are rescored and reranked with a prosodic break model, a prosodic state model, a syllable prosodic-acoustic model, a syllable-juncture prosodic-acoustic model and a factored language model, so as to output a language tag, a prosodic tag and a phonetic segmentation tag, which correspond to the speech signal. The present invention performs rescoring in a two-stage way to promote the recognition rate of basic speech information and labels the language tag, prosodic tag and phonetic segmentation tag to provide the prosodic structure and language information for the rear-stage voice conversion and voice synthesis.
Effect of processing kinetics on the structure of ferromagnetic-ferroelectric-ferromagnetic interfaces
(2012-11-15)
Krishnan, P. S. Sankara Rama
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Ramasse, Q. M.
;
Liang, Wen-I
;
Chu, Ying-Hao
;
Nagarajan, V.
Trilayer heterostructures consisting of a ferroelectric bismuth ferrite (BFO) film sandwiched between ferromagnetic lanthanum strontium manganese oxide (LSMO) films were fabricated using pulsed laser deposition. Both BFO thicknesses (20 nm, 5 nm) and cooling rates were varied to investigate the role of processing parameters on the chemistry of the interfaces. The interfaces were investigated using a dedicated aberration corrected scanning transmission electron microscope (STEM) operated at 100 kV via STEM-high angle annular dark field (STEM-HAADF) and STEM-electron energy loss spectroscopy (STEM-EELS) modes. Combined analysis through STEM-HAADF and STEM-EELS revealed the formation of lattice distortion in certain regions of the BFO layer for the similar to 5 nm film. Piezoresponse force microscopy (PFM) studies of the similar to 5 nm BFO sample revealed weak ferroelectric domain switching. Stacking fault defects with mixed valence manganese (Mn-B site cation) were formed in the top LSMO layer when the heterostructure was cooled at a slower rate irrespective of BFO thickness, thereby demonstrating the effect of processing kinetics on the physical integrity of the heterostructure. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4765045]
PHOTO-CROSSLINKABLE LIQUID CRYSTAL MONOMERS WITH OPTICAL ACTIVITY
(2012-11-15)
CHEN Yu-hsien
;
LIU Sheng-fa
;
LI Huai-an
;
FUH Sin-min
;
LIN Hong-cheu
The present invention relates to photo-crosslinkable liquid crystal monomers with optical activity. The liquid crystal monomers contains one chiral center with an acrylate group or terminal diacrylate groups, and terminal dibenzene rings are introduced in order to extend its hard segment for the purpose of getting a wider liquid crystalline phase. By introducing the liquid crystal monomers, the room temperature nematic liquid crystal or the cholesteric liquid crystal may have a better mutual solubility and a wider, steadier structure of liquid crystal. The liquid crystal monomers have the following formula structure:
Phase evolution of magnetite nanocrystals on oxide supports via template-free bismuth ferrite precursor approach
(2012-11-15)
Cheung, Jeffrey
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Bogle, Kashinath
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Cheng, Xuan
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Sullaphen, Jivika
;
Kuo, Chang-Yang
This report investigates the phase evolution pathway of magnetite nanocrystal synthesis on oxide-supported substrates. A template-free phase separation approach, which exploits the thermodynamic instability of ternary perovskite BiFeO3 and inherent volatility of bismuth oxide in low oxygen pressure and high temperature is presented. The formation of an intermediate hematite nanocrystal phase is found as a key step that controls the eventual size and morphology of the magnetite nanocrystals. X-ray absorption spectra measurements and X-ray magnetic circular dichroism confirm that the spectral fingerprints of the magnetite nanocrystals match with that of bulk crystals. Magnetic measurements show that magnetic anisotropy is directly attributed to the nanocrystal morphology. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4766748]
LOAD-ADAPTIVE BIOELECTRIC CURRENT STIMULATOR
(2012-11-15)
Ker Ming-Dou
;
Chen Wei-Ling
;
Lin Chun-Yu
The disclosure relates to a load-adaptive bioelectrical current stimulator, which comprises a current output module, an adaptation module and a control module. The current output module generates a stimulus current to an electrode. The adaptation module detects the electrical status of the stimulus current passing through the electrode and generates a feedback signal to the control module. According to the feedback signal, the control module controls the current output module to stabilize the output status of the stimulus current adaptively. Thereby, the load-adaptive bioelectrical current stimulator can use the feedback control mechanism to regulate the value of the stimulus current to adapt to variation of load impedance.
Active touch sensing circuit apparatus
(2012-11-15)
Tai Ya-Hsiang
;
Chou Lu-Sheng
;
Chiu Hao-Lin
The invention discloses an active matrix touch sensing circuit apparatus used in a touch panel comprises a sensing unit, a resistance, and a thin film transistor. The resistance connects the sensing unit and the first scan line. The control end of the thin film transistor connects the sensing unit, the second scan line connects the input end of the thin film transistor, and the read out line connects the output end of the thin film transistor. When the sensing value of the body touch sensing unit is changed, and then the input wave form of the control end is changed. The output end generates an open current, and the read out line transmits the open current.
Exploring the spatio-temporal dynamics of an optically pumped semiconductor laser with intracavity second harmonic generation
(2012-11-15)
Liang, Hsing-Chih
;
Lee, Yi-Chun
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Tung, Jung-Chen
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Su, Kuan-Wei
;
Huang, Kai-Feng
We experimentally observe an intriguing phenomenon of complex spatio-temporal dynamics in a commercial optically pumped semiconductor laser with intracavity second harmonic generation. We numerically verify that the experimental results come from the total mode locking of transverse electromagnetic modes (TEM00) and higher-order modes with significant astigmatism. The scenarios of the spatio-temporal dynamics are quite similar to the phenomena in soft-aperture Kerr-lens mode locked Ti:sapphire lasers. (C) 2012 Optical Society of America
Rotational Invariance of the Effective Refractive Index in Photonic Crystals
(2012-11-15)
Pei, Ting-Hang
;
Huang, Yang-Tung
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材料科學與工程學系
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電子工程學系及電子研究所
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Department of Materials Science and Engineering
The rotational invariance of the effective refractive index in the 2-D photonic crystal is discussed. It is proven that, in the case of the n-fold symmetrical omega-k equifrequency surface (EFS), there are two solutions that show the invariance of the effective refractive index after rotating a multiple of the basic repeated angle 2 pi/n within the first Brillouin zone. For the noncircular solution, the behavior of the effective refractive index N-eff(theta) at normal incidence shows that N-eff(0 degrees) has an additional constant of two in the very high symmetric EFS, higher than in the low symmetric case.
中文語音辨識裝置及其辨識方法
(2012-11-16)
楊智合
;
江振宇
;
劉銘傑
;
王逸如
;
廖元甫
本發明係揭露一種中文語音辨識裝置及其辨識方法，首先，接收一語音訊號，以進行辨識後，輸出一格狀詞組(word lattice)。接著，接收格狀詞組，並根據一韻律停頓模型、一韻律狀態模型、一音節韻律聲學模型、一音節間韻律聲學模型與一因子化語言模型，重新計算格狀詞組中詞弧上的分數，將其重新排名，以輸出語音訊號對應之一語言標籤、一韻律標籤與一音段標記。本發明利用兩階段方式重新計分，不僅可提升基本語音資訊的辨識率，更可標記出語言、韻律、音段等標籤，以供後級語音技術所需的韻律結構與語言資訊。
一種主動式觸控感測電路裝置
(2012-11-16)
戴亞翔
;
周祿盛
;
邱皓麟
本發明揭露一種主動式觸控感測電路裝置，係適用於一觸控面板，該主動式觸控感測電路包含：感測單元、電阻、電晶體。電阻係連接感測單元，且電阻係連接於第一掃瞄線。電晶體之控制端係連接於感測單元，電晶體之輸入端係連接於第二掃瞄線，電晶體之輸出端連接於讀取線。當一物體觸摸感測單元感測單元之感測值係改變，以使控制端之輸入波形產生改變，並使輸出端輸出開電流，而藉由讀取線傳輸開電流。
利用酵素法合成醣基化合物
(2012-11-16)
李耀坤
;
邱惜禾
;
傅于烈
;
呂佳諭
;
邱鈺安
本發明係有關於一種利用廣效性醣基轉移酶合成醣基化合物之方法，包括：提供一醣基提供者、一醣基接受者及一金屬離子之混合溶液；以及加入一廣效性醣基轉移酶至該混合溶液中，以合成一醣基化合物。其中，本發明之醣基接受者可為一苯酚類、硫酚類或芳香族胺化合物，且醣基化之後可改變原化合物之溶解度、生物利用性、化學穩定度等多種性質，大幅提高其應用性。
遠距收音裝置
(2012-11-16)
白明憲
;
王俊凱
本發明提供一種遠距收音裝置,包括至少一麥克風、至少一號角收音器及一自動增益控制模組,利用麥克風接收外部聲音,而號角收音器設於麥克風之前端可增加麥克風收音之指向性並抑制環境噪音;自動增益控制模組設於麥克風中或一主機中,依據麥克風所接收之外部聲音之音量大小,比對一統計曲線找出最適當的增益値,對外部聲音進行音訊增益。
具負載適應性之生物電流刺激器
(2012-11-16)
柯明道
;
陳韋霖
;
林群祐
本發明揭露一種具負載適應性之生物電流刺激器，包括一電流輸出模組、一適配模組以及一控制模組。電流輸出模組係用產生一刺激電流予一電極。適配模組係用以偵測刺激電流通過電極時的電性，進而產生一回授訊號給控制模組。最後，控制模組再根據回授訊號，控制電流輸出模組，以適應性穩定刺激電流的輸出狀態。藉此，具負載適應性之生物電流刺激器得以針對刺激電流之具體輸出狀況，透過回授控制機制來調整刺激電流的大小，以因應負載的阻抗變化。
心電生理訊號量測裝置
(2012-11-16)
李鎮宜
;
陳瑞杰
;
黃經堯
;
游瑞元
;
程士恒
一種心電生理訊號量測裝置，包含至少二個第一訊號感測單元、訊號處理模組及電源供應模組，其中，第一訊號感測單元係用以感測生物體之心電生理訊號，訊號處理模組用以接收感測出之心電生理訊號並進行校調處理，進而將經校調處理之心電生理訊號發送至外部的資訊顯示裝置，而電源供應模組係透過有線或無線之方式與訊號處理模組電性連接，藉以提供電源。藉此，本發明之心電生理訊號量測裝置可供使用者簡單、快速地感測出所需的心電生理訊號，以充分符合緊急醫療用途之需求。
照光聚合型之旋光性液晶單體
(2012-11-16)
陳玉仙
;
劉勝發
;
李懷安
;
傅欣敏
;
林宏洲
本發明揭露一種照光聚合型之旋光性液晶單體，包含單壓克力基或雙壓克力基之旋光中心分子，引進雙苯環結構來延伸其硬段，促使具有較寬廣的液晶相。將之摻混在室溫型之向列相液晶或是膽固醇相液晶時，能夠有較佳的互容性及較寬廣且穩定度佳的液晶結構。所述照光聚合型之旋光性液晶單體具有下列結構式：