Browsing by Issue Date, starting with "2020-09-28"

Now showing 1 - 20 of 4300

序言：遇見 ?%的客家
(國立交通大學傳播與科技學系, 2020-09-28)
國立交通大學客家文化學院院長黃紹恆
傳科系的「客家深度報導」，在師生殫精竭慮地尋找題材，經過縝密採訪、寫作及出版的計畫與執行，除展現師生整學期燒腦的成果外，也讓臺灣社會了解到今日臺灣國內外的各領域，原來都有些表現傑出的客家人。
Abnormal hysteresis formation in hump region after positive gate bias stress in low-temperature poly-silicon thin film transistors
(2020-09-30)
Tu, Hong-Yi
;
Chang, Ting-Chang
;
Tsao, Yu-Ching
;
Tai, Mao-Chou
;
Tsai, Yu-Lin
Degradation in low-temperature polycrystalline-silicon thin-film transistors after electrical stress was thoroughly investigated in this work. Main channel degradation, abnormal hump generation and hysteresis appearing in the hump region can be observed after positive bias stress. Furthermore, the difference in subthreshold swing (SS) values between forward/reverse sweep is observed. The electron trapping into the gate insulator (GI) dominates the main degradation and the hump generation. Additionally, the difference in SS values which appears in the hump region is attributed to the interface traps and the hysteresis is caused by electron trapping/detrapping into GI.
一「分」為二；一「生」為二
(國立陽明交通大學出版社, 2020-10-01)
王德威
【資訊系友】蔡祈岩學長：正面的態度讓你哪裡都是舒適圈
(國立交通大學資訊學院, 2020-10)
高儷玲
績效回饋的矛盾與創新型態：以台灣上市櫃半導體業為例
(國立交通大學經營管理研究所, 2020-10-01)
曾真真
;
曾曉萍
;
賴勇成
;
Jen-Jen Tseng
;
Hsiao-Ping Tsen
績效回饋如何影響組織適應是組織和策略研究中的重要議題。本研究延伸這一研究主軸，探討績效回饋對創新型態的影響。另外，探索和應用是創新的兩種形態，對公司的長期發展至關重要，因此我們特別採台灣上市櫃IC公司進行實證，以瞭解正回饋、負回饋及二種不一致的回饋對探索和應用二種創新活動的影響。實證時以台灣上市櫃IC業的152家公司1309個觀測值以GEE Poisson迴歸進行實證，研究結果發現正績效愈有助探索創新；負績效會降低探索創新。當廠商績效進步，但績效仍低於同業時，較會從事應用創新；廠商績效雖然退步，但仍超越同業時，較會從事探索創新。
Experimental investigation on defrosting of a cold flat plate via ultrasonic vibration under natural convection
(2020-10-01)
Amer, Mohammed
;
Wang, Chi-Chuan
;
機械工程學系
;
Department of Mechanical Engineering
The present experimental study examines the effect of ultrasonic vibration on the frost formation under a free convective environment. A stainless steel SS ANSI 316 flat surface is tested under 12-24 degrees C dry bulb temperature and 58-84% relative humidity. The experiments are conducted with direct contact and non-contact high-frequency ultrasonic source having continuous or intermittent vibrations. The ultrasonic transducer contains 28 +/- 0.5 kHz resonance frequency. It is found that increasing the relative humidity will increase the frost thickness and influences the frost property. Imposing ultrasonic vibration under high relative humidity and low ambient temperature increases the droplets' circularity with comparatively sparse distribution. Test results indicate that non-contact vibration has no effect on the frost formation. Intensive intermittent contact vibration is the most effective way to suppress frost growth. Compared to continuous contact vibration, either it is applied after each an hour or after every 30 min as an intensive continuous, intensive intermittent contact vibration shows a reduction in frost thickness as much as 24%. In addition, the ultrasonic vibration should be applied after the supersaturation stage since ultrasonic vibration enhances the supercooled process.
A mechanistic model for nucleate boiling heat transfer performance with lubricant-refrigerant mixture
(2020-10-01)
Hung, Jung-Tsung
;
Chen, Yu-Kai
;
Shih, Hou-Kuang
;
Wang, Chi-Chuan
;
機械工程學系
The present study proposes a rationally based model to investigate the influence of lubricant on the nucleate boiling characteristics of refrigerant-lubricant mixtures. This model is developed based on site-activation boiling mechanism along with detailed physical parameters in association with thermal and hydrodynamic processes, including waiting period for bubble incipience, bubble growth and departure period. Yet, the model also encompasses the polymer adsorption theory and energy gap concept to address the effect of lubricant with different chemical structure and physical property on the heat transfer phenomenon during each period of nucleate boiling individually. In addition, by using the partition function with Boltzmann energy distribution in different energy state, bubble density can be expressed in an analytic form to facilitate the calculation of heat transfer coefficient. Based on the proposed model, the presence of lubricant appreciably changes interfacial energy upon metal-liquid and liquid-bubble interfaces. The lubricant prefers lying on metal surface, thereby influencing surface coverage concentration when bubble is initiating. Such lubricant-rich layer near metal surface significantly alters the waiting period of nucleate boiling process, bubble size, growth and departure time, bubble density and superheat on heating surface. In essence, the presence of lubricant dramatically influences heat transfer performance. The proposed model is validated against some recent test data for R-134a/POE, R-1234ze/POE and R-134a/PVE refrigerant/lubricants mixtures. (C) 2020 Elsevier Ltd. All rights reserved.
Annealing effects on resistive switching of IGZO-based CBRAM devices
(2020-10-01)
Gan, Kai-Jhih
;
Liu, Po-Tsun
;
Ruan, Dun-Bao
;
Chiu, Yu-Chuan
;
Sze, Simon M.
In this study, the impact of post-oxide deposition annealing on performance of IGZO-based conductive-bridging random access memory (CBRAM) is reported. It is found that besides the distinct reduction in resistive switching parameters of SET/RESET voltages, their dispersions, and the resistance ratio of high-resistance state to low-resistance state can be improved after N-2 annealing. The annealing effects on enhancing of the resistive switching properties are investigated by x-ray photoelectron spectra. It can be considered that the formation of the filament is better controlled by the increase of oxygen vacancies in the switching layer, which is the main reason for the improvement of resistive switching characteristics.
信評機構與投資人能否辨識中國銀行業的影子？由財務報表觀察
(國立交通大學經營管理研究所, 2020-10-01)
黃玉麗
;
沈中華
;
Yu-Li Huang
;
Chung-Hua Shen
本文納入2007至2017年間，中國商業銀行獲得的本土與國際信評公司發布的信用評等，檢視信評公司與投資人是否關注並如何看待中國式的影子銀行。實證結果包括，首先，銀行的同業業務比率愈高，且不管是同業資產或者同業負債愈高，中國本土的信評公司均給予較差的信用評等。其次，中國的商業銀行承做愈高的同業業務，獲得的國際信評公司給予的信用評等愈差。此結果尤其成立與穆迪與惠譽信評公司。第三，信用評等可以解釋債券收益率差，當信評公司給予較差的信用評等，投資人會要求較高的風險溢酬，且不論是本土信評公司或國際信評公司的評等都對債券收益率差有訊息效果。第四，在排除信用評等對債券收益率差的影響之後，投資人對承做較高同業業務的銀行，要求較低的風險溢酬。可知，投資人對同業業務的風險意識低於信評公司。
Multiclass machine learning classification of functional brain images for Parkinson's disease stage prediction
(2020-10-01)
Huang, Guan-Hua
;
Lin, Chih-Hsuan
;
Cai, Yu-Ren
;
Chen, Tai-Been
;
Hsu, Shih-Yen
We analyzed a data set containing functional brain images from 6 healthy controls and 196 individuals with Parkinson's disease (PD), who were divided into five stages according to illness severity. The goal was to predict patients' PD illness stages by using their functional brain images. We employed the following prediction approaches: multivariate statistical methods (linear discriminant analysis, support vector machine, decision tree, and multilayer perceptron [MLP]), ensemble learning models (random forest [RF] and adaptive boosting), and deep convolutional neural network (CNN). For statistical and ensemble models, various feature extraction approaches (principal component analysis [PCA], multilinear PCA, intensity summary statistics [IStat], and Laws' texture energy measure) were employed to extract features, the synthetic minority over-sampling technique was used to address imbalanced data, and the optimal combination of hyperparameters was found using a grid search. For CNN modeling, we applied an image augmentation technique to increase and balance data sizes over different disease stages. We adopted transfer learning to incorporate pretrained VGG16 weights and architecture into the model fitting, and we also tested a state-of-the-art machine learning model that could automatically generate an optimal neural architecture. We found that IStat consistently outperformed other feature extraction approaches. MLP and RF were the analytic approaches with the highest prediction accuracy rate for multivariate statistical and ensemble learning models, respectively. Overall, the deep CNN model with pretrained VGG16 weights and architecture outperformed other approaches; it captured critical features from imaging, effectively distinguished between normal controls and patients with PD, and achieved the highest classification accuracy.
法治之非法
(國立陽明交通大學出版社, 2020-10-01)
陳錦榮
;
林家瑄
【教師專訪】黃敬群教授：學無止境，勇於創新
(國立交通大學資訊學院, 2020-10)
高儷玲
【產學合作】人工智慧系統檢測中心協助企業加速引進AI
(國立交通大學資訊學院, 2020-10)
陳添福/資工系教授
;
連慶/資科工所碩士生
抵抗、協商與認同：東莞夜市小販的身分實踐
(國立陽明交通大學出版社, 2020-10-01)
黃微子
;
王靜雯
中國大陸很多城市有著發達的夜市文化，卻缺乏對夜市小販群體的身分研究。本文以東莞作為田野，回溯小販在舊城街邊聚集形成夜市，到最終被迫搬遷、離開街道的四至五年歷史，主要討論小販如何通過日常活動實踐其身分政治。研究者發現，本地青年小販先是基於校友認同，繼而基於地緣政治內部的階級認同，來組織串聯，挪用文化保育的論述來合法化占街經營的行為。階級認同無法跨越地方文化歧視，因而形成本地小販對外地小販的排斥。但當攤販被迫搬遷上樓，經營的經濟門檻大幅提升後，地方認同實際上被擱置，夜市空間為小販中有相對較高資本的階層所共享。
關係連結對服務失誤補救滿意度和再購意願間關係之干擾效果
(國立交通大學經營管理研究所, 2020-10-01)
黃銘章
;
呂鴻德
;
洪千惠
;
陳彥寧
;
Ming-Chang Huang
曩昔有相當多的研究探討，服務失誤與補救的連結，所產生服務失誤矛盾的現象，然而，研究結果也相當多不一致。本研究認為關係連結，係為影響服務補救矛盾是否發生的重要因素，服務補救滿意度與顧客再購意願之間的關係，也會受到關係連結的影響。本研究藉由兩個2 X 2實驗設計進行資料收集並進行假說驗證。實驗一的目的在於檢視在不同的關係連結下，是否會發生服務失誤補救的矛盾；實驗二的目的，則是檢視關係連結對於補救滿意度與再購意願間關係的影響。進行實驗時，受測者被隨機指派到不同的實驗情境，觀賞不同情境的影片。篩選完無效問卷，實驗一有效問卷為558份，實驗二有效問卷獲致274份。本研究結果顯示，於強連結情境下，會發生服務補救矛盾的現象；另於強連結情境下，補救滿意度對再購意願間的影響則較強。
【募款計畫】
(國立交通大學資訊學院, 2020-10)
「麻風為業」的當代中國式汙名與韌性
(國立陽明交通大學出版社, 2020-10-01)
孫賀
《十年》與香港後雨傘情感政治
(國立陽明交通大學出版社, 2020-10-01)
麥樂文
《十年》是關於香港未來的電影拍攝計劃。由於碰觸了尖銳的政治議題，電影公映初期受傳統商業發行機制以各種理由排斥、抵制，只在少數院線上映，僅有的播放影院甚至在高票房情形下突然落畫。電影團隊後轉而與民間團體合作，舉行社區放映活動，以非主流的方式流通，卻取得了主流電影評獎體制的肯認－香港電影金像獎最佳電影。當電影被《環球時報》批評「《十年》導演們宣揚絕望」、「在這座城市裡擴散焦慮」，不少「進步」評論人同樣認為影片流於情緒抒發而無助建立香港主體性，對立的政治立場弔詭地同以情緒之名進行批評，正好指向了可能的介入路徑－情感的政治。《十年》作為電影文本固然是情感的中介，當文本在不同場域、社會機制流通時所產生的各種論述，同樣是情感流通的過程、環節之一，當中的抵抗與斡旋不僅指向《十年》本身，同時打開了討論當下香港文化政治的空間。本文將重構《十年》的流通脈絡，借助阿赫美（Sara Ahmed）、威廉斯（Raymond Williams）、布朗（Wendy Brown）等理論資源，探討文本及其流通的情感邏輯，嘗試尋求後雨傘香港文化政治的另類理解。
冷戰／劃界的思想考掘：朝向解放政治
(國立陽明交通大學出版社, 2020-10-01)
王智明
再現實驗場生命
(國立陽明交通大學出版社, 2020-10-01)
張超雄